Rammstein (German for ramming stone) is a German Neue Deutsche Härte band formed in Berlin in 1994. The band's lineup—consisting of lead vocalist Till Lindemann, lead guitarist Richard Kruspe, rhythm guitarist Paul Landers, bassist Oliver Riedel, drummer Christoph Schneider, and keyboardist Christian "Flake" Lorenz—has remained unchanged throughout their history, along with their approach to songwriting, which consists of Lindemann writing and singing the lyrics over instrumental pieces the rest of the band has completed beforehand. Prior to their formation, some members were associated with the punk rock acts Feeling B and First Arsch.

After winning a local contest, Rammstein was able to record demos and send them to different record labels, eventually signing with Motor Music. Working with producer Jacob Hellner, they released their debut album Herzeleid in 1995. Though the album initially sold poorly, the band gained popularity through their live performances and the album eventually reached No. 6 in Germany. Their second album, Sehnsucht, was released in 1997 and debuted at No. 1 in Germany, resulting in a worldwide tour lasting nearly four years and spawning the successful singles "Engel" and "Du hast" and the live album Live aus Berlin (1999). Following the tour, Rammstein signed with major label Universal Music and released Mutter in 2001. Six singles were released from the album, all charting in countries throughout Europe. The lead single, "Sonne", reached No. 2 in Germany. Rammstein released Reise, Reise in 2004 and had two more singles reach No. 2 in Germany: "Mein Teil" and "Amerika"; the former song reached No. 1 in Spain, becoming their first No. 1 single.

Their fifth album, Rosenrot, was released in 2005, and the lead single, "Benzin", reached No. 6 in Germany. Their second live album, Völkerball, was released in 2006. The band released their sixth album, Liebe ist für alle da, in 2009, with its lead single, "Pussy", becoming their first No. 1 hit in Germany despite having a controversial music video that featured hardcore pornography. The band then entered a recording hiatus and toured for several years, releasing the Made in Germany greatest hits album as well as the Rammstein in Amerika and Paris live albums. After a decade without new music, Rammstein returned in 2019 with the song "Deutschland", which became their second No. 1 hit in Germany. Their untitled seventh studio album was released in May 2019 and reached No. 1 in 14 countries. While sheltering during COVID-19 lockdowns, the band spontaneously wrote and recorded their eighth studio album, Zeit, which was released in April 2022.

Rammstein was one of the first bands to emerge within the Neue Deutsche Härte genre, with their debut album leading the music press to coin the term, and their style of music has generally had a positive reception from music critics. Commercially, the band has been very successful, earning many No. 1 albums as well as gold and platinum certifications in countries around the world. Their grand live performances, which often feature pyrotechnics, have contributed to the growth in their popularity. Despite success, the band has been subject to some controversies, with their overall image having been criticized; for instance, the song "Ich tu dir weh" forced its parent album Liebe ist für alle da to be re-released in Germany with the song removed due to its sexually explicit lyrics.

In 1989, East German guitarist Richard Kruspe escaped to West Berlin and started the band Orgasm Death Gimmick. At that time, he was heavily influenced by US music, especially that of rock group Kiss. After the Berlin Wall came down, he moved back home to Schwerin, where Till Lindemann worked as a basket-weaver and played drums in the band First Arsch (loosely translated as "First Arse" or "First Ass"). At this time, Kruspe lived with Oliver Riedel of the Inchtabokatables and Christoph Schneider of Die Firma.

In 1992, Kruspe made his first trip to the United States with Till Lindemann and Oliver "Ollie" Riedel. He realized that he did not want to make US music and concentrated on creating a unique German sound. Kruspe, Riedel and Schneider started working together on a new project in 1993. Finding it difficult to write both music and lyrics, Kruspe persuaded Lindemann, whom he had overheard singing while he was working, to join the fledgling group. The band called themselves Rammstein-Flugschau (Rammstein Airshow) after the 1988 Ramstein air show disaster. Guitarist Paul Landers said the spelling of Ramstein with the extra "m" was a mistake. After the band became popular, the band members denied the connection to the air show disaster and said that their name was inspired by the giant doorstop-type devices found on old gates, called Rammsteine. The extra "m" in the band's name makes it translate literally as "ramming stone". In a 2019 feature, Metal Hammer explained that the band was named after one of their earliest songs, "Ramstein", written after the air show disaster at the American airbase in Ramstein. According to the band, people started to refer to them as "the band with the 'Ramstein song'" and later as the "Ramstein band".

Rammstein co-existed with the members' previous projects for about a year and a half. Members would invest the money raised with Feeling B shows in Rammstein. They recorded their first songs in a building that had been squatted by Feeling B frontman Aljoscha Rompe. A contest was held in Berlin for amateur bands in 1994, the winner of which would receive access to a professional recording studio for a whole week. Kruspe, Riedel, Schneider, and Lindemann entered and won the contest with a 4-track demo tape with demo versions of songs from Herzeleid, written in English. This sparked Landers' attention, who wanted in on the project upon hearing their demo. To complete their sound, Rammstein attempted to recruit Christian "Flake" Lorenz, who had played with Landers in Feeling B. Though initially hesitant, Lorenz eventually agreed to join the band. Later, Rammstein were signed by Motor Music.

Rammstein began to record their first studio album, Herzeleid, in March 1995 with producer Jacob Hellner. They released their first single "Du riechst so gut" that August and released the album in September. Later that year, they toured with Clawfinger in Warsaw and Prague. Rammstein headlined a 17-show tour of Germany in December, which helped boost the band's popularity and establish them as a credible live act. They went on several tours throughout early 1996, releasing their second single titled "Seemann" on 8 January. On 27 March 1996, Rammstein performed on MTV's Hanging Out in London, their first performance in the UK. Their first major boost in popularity outside Germany came when Nine Inch Nails frontman Trent Reznor chose two Rammstein songs, "Heirate mich" and "Rammstein", during his work as music director for the David Lynch 1997 film Lost Highway. The soundtrack for the film was released in the U.S. in late 1996 and later throughout Europe in April 1997. In the middle of 1996, they headlined one tour of their own in small, sold-out venues. Rammstein went on to tour through Germany, Austria, and Switzerland from September to October 1996, performing an anniversary concert on 27 September called "100 years of Rammstein". Guests to the concert included Moby, Bobo, and the Berlin Session Orchestra, while Berlin director Gert Hof was responsible for the light show.


Streetcars or trolley(car)s (North American English for the European word tram) were once the chief mode of public transit in hundreds of North American cities and towns. Most of the original urban streetcar systems were either dismantled in the mid-20th century or converted to other modes of operation, such as light rail. Today, only Toronto still operates a streetcar network essentially unchanged in layout and mode of operation.

Older surviving lines and systems in Boston, Cleveland, Mexico City, Newark, Philadelphia, Pittsburgh, and San Francisco were often infrastructure-heavy systems with tunnels, dedicated right-of-way, and long travel distances, or have largely rebuilt their streetcar systems as light rail systems. About 22 North American cities, starting with Edmonton, Calgary and San Diego, have installed new light rail systems, some of which run along historic streetcar corridors. A few recent cases feature mixed-traffic street-running operation like a streetcar. Portland, Oregon, Seattle, and Salt Lake City have built both modern light rail and modern streetcar systems, while Tucson, Oklahoma City and Atlanta have built new modern streetcar lines. A few other cities and towns have restored a small number of lines to run heritage streetcars either for public transit or for tourists; many are inspired by New Orleans' St. Charles Streetcar Line, generally viewed as the world's oldest continuously operating streetcar line.

From the 1820s to the 1880s urban transit in North America began when horse-drawn omnibus lines started to operate along city streets. Examples included Gilbert Vanderwerken's 1826 omnibus service in Newark, New Jersey. Before long Omnibus companies sought to boost profitability of their wagons by increasing ridership along their lines. Horsecar lines simply ran wagons along rails set in a city street instead of on the unpaved street surface as the omnibus lines used. When a wagon was drawn upon rails the rolling resistance of the vehicle was lowered and the average speed was increased.

A horse or team that rode along rails could carry more fare paying passengers per day of operation than those that did not have rails. North America's first streetcar lines opened in 1832 from downtown New York City to Harlem by the New York and Harlem Railroad, in 1834 in New Orleans, and in 1849 in Toronto along the Williams Omnibus Bus Line.

These streetcars used horses and sometimes mules. Mules were thought to give more hours per day of useful transit service than horses and were especially popular in the south in cities such as New Orleans, Louisiana. In many cities, streetcars drawn by a single animal were known as "bobtail streetcars" whether mule-drawn or horse-drawn. By the mid-1880s, there were 415 street railway companies in the U.S. operating over 6,000 miles (9,700 km) of track and carrying 188 million passengers per year using animal-drawn cars. In the nineteenth century Mexico had streetcars in around 1,000 towns and many were animal-powered. The 1907 Anuario Estadístico lists 35 animal-powered streetcar lines in Veracruz state, 80 in Guanajuato, and 300 lines in Yucatán.

Although most animal-drawn lines were shut down in the 19th century, a few lines lasted into the 20th century and later. Toronto's horse-drawn streetcar operations ended in 1891. New York City saw regular horsecar service last until 1917. In Pittsburgh, Pennsylvania, the Sarah Street line lasted until 1923. The last regular mule-drawn cars in the United States ran in Sulphur Rock, Arkansas, until 1926 and were commemorated by a U.S. Postage Stamp issued in 1983. The last mule tram service in Mexico City ended in 1932, and a mule-powered line in Celaya, survived until May 1954.

In the 21st century, horsecars are still used to take visitors along the 9-kilometre (5.6 mi) tour of the 3 cenotes from Chunkanán near Cuzamá Municipality in the state of Yucatán. Disneyland theme park in Anaheim, Cal., has operated a short horsecar line since it opened in July 1955. Similarly, Disney World theme park in Orlando has operated a short horsecar line since it opened in Oct 1971. At both parks, they run from 8-9am to 1:30-2pm, and, depending on the season, sometimes 5-7pm.

By 1889 110 electric railways incorporating Sprague's equipment had been started or were planned on several continents. By 1895 almost 900 electric street railways and nearly 11,000 miles (18,000 km) of track had been built in the United States.

The rapid growth of streetcar systems led to the widespread ability of people to live outside of a city and commute into it for work on a daily basis. Several of the communities that grew as a result of this new mobility were known as streetcar suburbs. Another outgrowth of the popularity of urban streetcar systems was the rise of interurban lines, which were basically streetcars that operated between cities and served remote, even rural, areas. In some areas interurban lines competed with regular passenger service on mainline railroads and in others they simply complemented the mainline roads by serving towns not on the mainlines. The largest of these was the Pacific Electric system in Los Angeles, which had over 1,000 miles (1,600 km) of track and 2,700 scheduled services each day.

The Hagerstown and Frederick Railway that started in 1896 in northern Maryland was built to provide transit service to resorts and the streetcar company built and operated two amusement parks to entice more people to ride their streetcars. The Lake Shore Electric Railway interurban in northern Ohio carried passengers to Cedar Point and several other Ohio amusement parks. The Lake Compounce amusement park, which started in 1846, had by 1895 established trolley service to its rural Connecticut location. Although outside trolley service to Lake Compounce stopped in the 1930s, the park resurrected its trolley past with the opening of the "Lakeside Trolley" ride in 1997 which is still operating today as a short heritage line. In the days before widespread radio listening was popular and in towns or neighborhoods too small to support a viable amusement park streetcar lines might help to fund an appearance of a touring musical act at the local bandstand to boost weekend afternoon ridership.

Many of Mexico's streetcars were fitted with gasoline motors in the 1920s and some were pulled by steam locomotives. Only 15 Mexican streetcar systems were electrified in the 1920s.


The East Carolina Pirates are a college football team that represents East Carolina University (variously "East Carolina" or "ECU"). The team is a member of the American Athletic Conference, which is in Division I Football Bowl Subdivision (formerly Division I-A) of the National Collegiate Athletic Association (NCAA). Mike Houston is the head coach.

The Pirates have won seven conference championships and nine bowl games. The Pirates have 20 All-Americans over its history. Four players have their jerseys retired. Numerous Pirates have played in the NFL, including ten current players.

The team played its inaugural season in 1932. The team played home games at College Stadium on the main campus from the 1949 to the 1962 season. With the exception of the 1999 Miami football game, they have played their home games at Dowdy–Ficklen Stadium every year since 1963. The stadium is located south of East Carolina's main campus near the intersection of South Charles Boulevard and 14th Street. Dowdy-Ficklen underwent an expansion in 2010, raising the capacity of the stadium to 50,000. The Pirates announced a $55 million renovation project to Dowdy-Ficklen in 2016, which will add a new tower above the south side stands, among other things.

The coaches and administrative support is located in the Ward Sports Medicine Building, which is located adjacent to the stadium. Strength and conditioning for the players occurs in the Murphy Center, a $13 million indoor training facility which was completed in June 2002 and which is located in the west end zone of Dowdy–Ficklen Stadium. The Pirates also practice and train at the Cliff Moore Practice Facility, which was fully renovated in 2005 and which has two full-length NFL-caliber fields.

Replacing Logan as the Pirates head coach was Florida defensive coordinator John Thompson. Thompson came to ECU with a great resume as an assistant coach and a reputation as a brilliant defensive mind, working under Lou Holtz at Arkansas, Joe Raymond Peace at Louisiana Tech, Curley Hallman and Jeff Bower at Southern Miss, Houston Nutt at Arkansas and Ron Zook at Florida.

Coach Thompson's tenure set the Pirates back several years, accumulating only three wins over two years, with records of 1–11 in 2003 and 2–9 in 2004. His teams beat only Army both years and Tulane his second year. Amid much fan and administration impatience and frustration with the struggles of the football program, athletics director Terry Holland fired Thompson after the 2004 season. Thompson left with an abysmal 3–20 record.

In December 2004, Holland brought in former UConn head coach Skip Holtz, son of legendary coach Lou Holtz, to become the Pirates nineteenth head football coach.

In his first season, Coach Holtz helped turn the team around winning five games, two more wins than the John Thompson had accomplished in his entire tenure. His second season marked the Pirates first winning season since 2000, winning seven games, and East Carolina was bowl-eligible for the first time since the 2001 season. The 2006 team had notable wins over Virginia, Southern Miss, Central Florida and North Carolina State. A loss to Rice in the last conference game of the year kept the Pirates out of the Conference USA Championship Game. For the teams winning season, the newly created Papajohns.com Bowl invited the team to play in their contest, where East Carolina lost to former C-USA rival South Florida, 24–7.

In 2007, Holtz' Pirates continued their winning ways. The team won eight regular season games, earning the team their second bowl game in two years. The Pirates played the Boise State in the Hawai'i Bowl, defeating the Broncos by a score of 41–38. The Hawaii Bowl win marked the first for the Pirates since the Galleryfurniture.com Bowl win against Texas Tech in 2000.

On August 30, 2008 the Pirates pulled off a stunning upset against then 17th ranked Virginia Tech 27–22 on a late blocked punt returned for a touchdown by senior wide receiver T.J. Lee. The following week they pulled off an even stronger upset of then 8th ranked West Virginia by the score of 24–3, not allowing a touchdown for the entire game. This was the Pirates third straight victory against a top-25 ranked opponent, counting Boise State from the year before. As a result, East Carolina was awarded with the number 14 ranking in the Associated Press poll and 20th in the USA Today poll, the highest since January 1992 when the Pirates were ranked ninth. The Pirates finished the 2008 regular season at 9-5, winning the Eastern Division of Conference USA and defeating Tulsa in the Championship game. This was the first Conference Championship for ECU since 1976. ECU was then invited to the Auto Zone Liberty bowl to face Kentucky, where the Pirates controlled the first half, but fell to UK 25-19. The next season, East Carolina produced a second Conference USA title with a 38-32 win over Houston, and finished the season at 9–5 after an overtime loss to the Arkansas in the Liberty Bowl.

On January 14, 2010, it was announced that Holtz was leaving his position at East Carolina to take the head football coach position at the South Florida, replacing the recently fired Jim Leavitt. Holtz left ECU with a 38–27 record.


The music industry consists of the individuals and organizations that earn money by writing songs and musical compositions, creating and selling recorded music and sheet music, presenting concerts, as well as the organizations that aid, train, represent and supply music creators. Among the many individuals and organizations that operate in the industry are: the songwriters and composers who write songs and musical compositions; the singers, musicians, conductors, and bandleaders who perform the music; the record labels, music publishers, recording studios, music producers, audio engineers, retail and digital music stores, and performance rights organizations who create and sell recorded music and sheet music; and the booking agents, promoters, music venues, road crew, and audio engineers who help organize and sell concerts.

The industry also includes a range of professionals who assist singers and musicians with their music careers. These include talent managers, artists and repertoire managers, business managers, entertainment lawyers; those who broadcast audio or video music content (satellite, Internet radio stations, broadcast radio and TV stations); music journalists and music critics; DJs; music educators and teachers; musical instrument manufacturers; as well as many others. In addition to the businesses and artists there are organizations that also play an important role, including musician's unions (e.g. American Federation of Musicians), not-for-profit performance-rights organizations (e.g. American Society of Composers, Authors and Publishers) and other associations (e.g. International Alliance for Women in Music, a non-profit organization that advocates for women composers and musicians).

The modern Western music industry emerged between the 1930s and 1950s, when records replaced sheet music as the most important product in the music business. In the commercial world, "the recording industry"—a reference to recording performances of songs and pieces and selling the recordings–began to be used as a loose synonym for "the music industry". In the 2000s, a majority of the music market is controlled by three major corporate labels: the French-owned Universal Music Group, the Japanese-owned Sony Music Entertainment,[1] and the US-owned Warner Music Group. Labels outside of these three major labels are referred to as independent labels (or "indies"). The largest portion of the live music market for concerts and tours is controlled by Live Nation, the largest promoter and music venue owner. Live Nation is a former subsidiary of iHeartMedia Inc, which is the largest owner of radio stations in the United States.

In the first decades of the 2000s, the music industry underwent drastic changes with the advent of widespread digital distribution of music via the Internet (which includes both illegal file sharing of songs and legal music purchases in online music stores). A conspicuous indicator of these changes is total music sales: since 2000, sales of recorded music have dropped off substantially while live music has increased in importance. In 2011, the largest recorded music retailer in the world was now a digital, Internet-based platform operated by a computer company: Apple Inc.'s online iTunes Store. Since 2011, the music industry has seen consistent sales growth with streaming now generating more revenue per year than digital downloads. Spotify, Apple Music, and Amazon Music are the largest streaming services by subscriber count.

Music publishing using machine-printed sheet music developed during the Renaissance music era in the mid-15th century. The development of music publication followed the evolution of printing technologies that were first developed for printing regular books. After the mid-15th century, mechanical techniques for printing sheet music were first developed. The earliest example, a set of liturgical chants, dates from about 1465, shortly after the Gutenberg Bible was printed. Prior to this time, music had to be copied out by hand. To copy music notation by hand was a very costly, labor-intensive, and time-consuming process, so it was usually undertaken only by monks and priests seeking to preserve sacred music for the church. The few collections of secular (non-religious) music that are extant were commissioned and owned by wealthy aristocrats. Examples include the Squarcialupi Codex of Italian Trecento music and the Chantilly Codex of French Ars subtilior music.

The use of printing enabled sheet music to reproduced much more quickly and at a much lower cost than hand-copying music notation. This helped musical styles to spread to other cities and countries more quickly, and it also enabled music to be spread to more distant areas. Before the invention of music printing, a composer's music might only be known in the city she lived in and its surrounding towns, because only wealthy aristocrats would be able to afford to have hand copies made of her music. With music printing, though, a composer's music could be printed and sold at a relatively low cost to purchasers from a wide geographic area. As sheet music of major composer's pieces and songs began to be printed and distributed in a wider area, this enabled composers and listeners to hear new styles and forms of music. A German composer could buy songs written by an Italian or English composer, and an Italian composer could buy pieces written by Dutch composers and learn how they wrote music. This led to more blending of musical styles from different countries and regions.

At the dawn of the early 20th century, the development of sound recording began to function as a disruptive technology to the commercial interests which published sheet music. During the sheet music era, if a regular person wanted to hear popular new songs, he or she would buy the sheet music and play it at home on a piano, or learn the song at home while playing the accompaniment part on piano or guitar. Commercially released phonograph records of musical performances, which became available starting in the late 1880s, and later the onset of widespread radio broadcasting, starting in the 1920s, forever changed the way music was heard and listened to. Opera houses, concert halls, and clubs continued to produce music and musicians and singers continued to perform live, but the power of radio allowed bands, ensembles and singers who had previously performed only in one region to become popular on a nationwide and sometimes even a worldwide scale. Moreover, whereas attendance at the top symphony and opera concerts was formerly restricted to high-income people in a pre-radio world, with broadcast radio, a much larger wider range of people, including lower and middle-income people could hear the best orchestras, big bands, popular singers and opera shows.

The "record industry" eventually replaced the sheet music publishers as the music industry's largest force. A multitude of record labels came and went. Some noteworthy labels of the earlier decades include the Columbia Records, Crystalate, Decca Records, Edison Bell, The Gramophone Company, Invicta, Kalliope, Pathé, Victor Talking Machine Company and many others. Many record companies died out as quickly as they had formed, and by the end of the 1980s, the "Big six" — EMI, CBS, BMG, PolyGram, WEA and MCA — dominated the industry. Sony bought CBS Records in 1987 and changed its name to Sony Music in 1991. In mid-1998, PolyGram Music Group merged with MCA Music Entertainment creating what we now know as Universal Music Group. Since then, Sony and BMG merged in 2004, and Universal took over the majority of EMI's recorded music interests in 2012. EMI Music Publishing, also once part of the now defunct British conglomerate, is now co-owned by Sony as a subsidiary of Sony/ATV Music Publishing. As in other industries, the record industry is characterised by many mergers and/or acquisitions, for the major companies as well as for middle sized business (recent example is given by the Belgium group PIAS and French group Harmonia Mundi).

Genre-wise, music entrepreneurs expanded their industry models into areas like folk music, in which composition and performance had continued for centuries on an ad hoc self-supporting basis. Forming an independent record label, or "indie" label, or signing to such a label continues to be a popular choice for up-and-coming musicians, especially in genres like hardcore punk and extreme metal, even though indies cannot offer the same financial backing of major labels. Some bands prefer to sign with an indie label, because these labels typically give performers more artistic freedom.


A transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any coil due to a changing magnetic flux encircled by the coil.

Transformers are used to change AC voltage levels, such transformers being termed step-up or step-down type to increase or decrease voltage level, respectively. Transformers can also be used to provide galvanic isolation between circuits as well as to couple stages of signal-processing circuits. Since the invention of the first constant-potential transformer in 1885, transformers have become essential for the transmission, distribution, and utilization of alternating current electric power.[2] A wide range of transformer designs is encountered in electronic and electric power applications. Transformers range in size from RF transformers less than a cubic centimeter in volume, to units weighing hundreds of tons used to interconnect the power grid.

An ideal transformer is linear, lossless and perfectly coupled. Perfect coupling implies infinitely high core magnetic permeability and winding inductance and zero net magnetomotive force. A varying current in the transformer's primary winding creates a varying magnetic flux in the transformer core, which is also encircled by the secondary winding. This varying flux at the secondary winding induces a varying electromotive force or voltage in the secondary winding. This electromagnetic induction phenomenon is the basis of transformer action and, in accordance with Lenz's law, the secondary current so produced creates a flux equal and opposite to that produced by the primary winding.

The windings are wound around a core of infinitely high magnetic permeability so that all of the magnetic flux passes through both the primary and secondary windings. With a voltage source connected to the primary winding and a load connected to the secondary winding, the transformer currents flow in the indicated directions and the core magnetomotive force cancels to zero.

According to Faraday's law, since the same magnetic flux passes through both the primary and secondary windings in an ideal transformer, a voltage is induced in each winding proportional to its number of windings. The transformer winding voltage ratio is equal to the winding turns ratio.

An ideal transformer is a reasonable approximation for a typical commercial transformer, with voltage ratio and winding turns ratio both being inversely proportional to the corresponding current ratio.

The load impedance referred to the primary circuit is equal to the turns ratio squared times the secondary circuit load impedance.

The ideal transformer model assumes that all flux generated by the primary winding links all the turns of every winding, including itself. In practice, some flux traverses paths that take it outside the windings. Such flux is termed leakage flux, and results in leakage inductance in series with the mutually coupled transformer windings. Leakage flux results in energy being alternately stored in and discharged from the magnetic fields with each cycle of the power supply. It is not directly a power loss, but results in inferior voltage regulation, causing the secondary voltage not to be directly proportional to the primary voltage, particularly under heavy load. Transformers are therefore normally designed to have very low leakage inductance.

In some applications increased leakage is desired, and long magnetic paths, air gaps, or magnetic bypass shunts may deliberately be introduced in a transformer design to limit the short-circuit current it will supply. Leaky transformers may be used to supply loads that exhibit negative resistance, such as electric arcs, mercury- and sodium- vapor lamps and neon signs or for safely handling loads that become periodically short-circuited such as electric arc welders.

Air gaps are also used to keep a transformer from saturating, especially audio-frequency transformers in circuits that have a DC component flowing in the windings. A saturable reactor exploits saturation of the core to control alternating current.

Knowledge of leakage inductance is also useful when transformers are operated in parallel. It can be shown that if the percent impedance [e] and associated winding leakage reactance-to-resistance (X/R) ratio of two transformers were the same, the transformers would share the load power in proportion to their respective ratings. However, the impedance tolerances of commercial transformers are significant. Also, the impedance and X/R ratio of different capacity transformers tends to vary.


The North China Craton is a continental crustal block with one of Earth's most complete and complex records of igneous, sedimentary and metamorphic processes. It is located in northeast China, Inner Mongolia, the Yellow Sea, and North Korea. The term craton designates this as a piece of continent that is stable, buoyant and rigid. Basic properties of the cratonic crust include being thick (around 200 km), relatively cold when compared to other regions, and low density. The North China Craton is an ancient craton, which experienced a long period of stability and fitted the definition of a craton well. However, the North China Craton later experienced destruction of some of its deeper parts (decratonization), which means that this piece of continent is no longer as stable.

The North China Craton was at first some discrete, separate blocks of continents with independent tectonic activities. In the Paleoproterozoic (2.5-1.8 billion years ago) the continents collided and amalgamated and interacted with the supercontinent, creating belts of metamorphic rocks between the formerly separate parts. The exact process of how the craton was formed is still under debate. After the craton was formed, it stayed stable until the middle of the Ordovician period (480 million years ago). The roots of the craton were then destabilised in the Eastern Block and entered a period of instability. The rocks formed in the Archean and Paleoproterozoic eons (4.6–1.6 billion years ago) were significantly overprinted during the root destruction. Apart from the records of tectonic activities, the craton also contains important mineral resources, such as iron ores and rare earth elements, and fossils records of evolutionary development.

The North China Craton covers approximately 1,500,000 km2 in area and its boundaries are defined by several mountain ranges (orogenic belts), the Central Asian Orogenic Belt to the north, the Qilianshan Orogen to the west, Qinling Dabie Orogen to the south and Su-Lu Orogen to the east. The intracontinental orogen Yan Shan belt ranges from east to west in the northern part of the craton.

The North China Craton consists of two blocks, the Western Block and the Eastern Block, separated by the 100–300 km wide Trans North China Orogen, which is also called Central Orogenic Belt or Jinyu Belt. The Eastern Block covers areas including southern Anshan-Benxi, eastern Hebei, southern Jilin, northern Liaoning, Miyun-Chengdu and western Shandong. Tectonic activities, such as earthquakes, increased since craton root destruction started in the Phanerozoic. The Eastern Block is defined by high heat flow, thin lithosphere and a lot of earthquakes. It experienced a number of earthquakes with a magnitude of over 8 on the Richter scale, claiming millions of lives. The thin mantle root, which is the lowest part of lithosphere, is the reason for its instability. The thinning of the mantle root caused the craton to destabilize, weakening the seismogenic layer, which then allows earthquakes to happen in the crust. The Eastern Block may once have had a thick mantle root, as shown by xenolith evidence, but this seems to have been thinned during the Mesozoic. The Western Block is located in Helanshan-Qianlishan, Daqing-Ulashan, Guyang-Wuchuan, Sheerteng and Jining. It is stable because of the thick mantle root. Little internal deformation occurred here since Precambrian.

The rocks in the North China craton consist of Precambrian (4.6 billion years ago to 539 million years ago) basement rocks, with the oldest zircon dated 4.1 billion years ago and the oldest rock dated 3.8 billion years ago. The Precambrian rocks were then overlain by Phanerozoic (539 million years ago to present) sedimentary rocks or igneous rocks. The Phanerozoic rocks are largely not metamorphosed. The Eastern Block is made up of early to late Archean (3.8-3.0 billion years ago) tonalite-trondhjemite-granodiorite gneisses, granitic gneisses, some ultramafic to felsic volcanic rocks and metasediments with some granitoids which formed in some tectonic events 2.5 billion years ago. These are overlain by Paleoproterozoic rocks which were formed in rift basins. The Western Block consists of an Archean (2.6–2.5 billion years ago) basement which comprises tonalite-trondhjemite-granodiorite, mafic igneous rock, and metamorphosed sedimentary rocks. The Archean basement is overlain unconformably by Paleoproterozoic khondalite belts, which consist of different types of metamorphic rocks, such as graphite-bearing sillimanite garnet gneiss. Sediments were widely deposited in the Phanerozoic with various properties, for example, carbonate and coal bearing rocks were formed in the late Carboniferous to early Permian (307-270 million years ago), when purple sand-bearing mudstones were formed in a shallow lake environment in the Early to Middle Triassic. Apart from sedimentation, there were six major stages of magmatism after the Phanerozoic decratonization. In Jurassic to Cretaceous (100-65 million years ago) sedimentary rocks were often mixed with volcanic rocks due to volcanic activities.

The North China Craton is very important in terms of understanding biostratigraphy and evolution. In Cambrian and Ordovician time, the units of limestone and carbonate kept a good record of biostratigraphy and therefore they are important for studying evolution and mass extinction. The North China platform was formed in early Palaeozoic. It had been relatively stable during Cambrian and the limestone units are therefore deposited with relatively few interruptions. The limestone units were deposited in underwater environment in Cambrian. It was bounded by faults and belts for example Tanlu fault. The Cambrian and Ordovician carbonate sedimentary units can be defined by six formations: Liguan, Zhushadong, Mantou, Zhangxia, Gushan, Chaomidian. Different trilobite samples can be retrieved in different strata, forming biozones. For example, lackwelderia tenuilimbata (a type of trilobite) zone in Gushan formation. The trilobite biozones can be useful to correlate and identify events in different places, like identifying unconformity sequences from a missing biozones or correlates events happening in a neighbouring block (like Tarim block).

The carbonate sequence can also be of evolutionary significance because it indicates extinction events like the biomeres in the Cambrian. Biomeres are small extinction events defined by the migration of a group of trilobite, family Olenidae, which had lived in deep sea environment. Olenidae trilobites migrated to shallow sea regions while the other trilobite groups and families died out in certain time periods. This is speculated to be due to a change in ocean conditions, either a drop in ocean temperature, or a drop in oxygen concentration. They affected the circulation and living environment for marine species. The shallow marine environment would change dramatically, resembling a deep sea environment. The deep sea species would thrive, while the other species died out. The trilobite fossils actually records important natural selection processes. The carbonate sequence containing the trilobite fossils hence important to record paleoenvironment and evolution.


The Chennai Metro is a rapid transit system serving the city of Chennai, Tamil Nadu, India. It is the 4th longest metro system In india. The system commenced service in 2015 after partially opening the first phase of the project. The network consists of two colour-coded lines covering a length of 54.65 kilometres (33.96 mi). The Chennai Metro Rail Limited (CMRL), a joint venture between Government of India and the Government of Tamil Nadu built and operates the Chennai Metro. The system has a mix of underground and elevated stations and uses standard gauge. The services operate daily between 4:30 and 23:00 with a varying frequency of 5 to 14 minutes.

Chennai had an established Chennai Suburban Railway network that spanned from Beach to Tambaram, which dates back to 1931 and operated on a metre-gauge line. This service is now being continued after conversion to broad gauge line up to Chengalpattu. The suburban network also consists of two more suburban lines, the west bound Dr. M.G.R. Central–Arakkonam suburban service and the north bound Dr. M.G.R. Central–Gummidipoondi. The first phase of Chennai Mass Rapid Transit System , India's first elevated line between Chennai Beach and Thirumayilai opened in 1995 with an extension to Velachery in 2007. Modeled after the Delhi Metro, a similar modern metro rail system was planned for Chennai by Delhi Metro chief E Sreedharan due to his special interest in the Chennai city.

The 25 km long Chennai Mass Rapid Transit System is likely to be handed over to CMRL by the Southern Railway. The entire system from Mount–Velachery–Beach will be upgraded as a broad gauge metro with all the facilities of the metro stations which includes tracks, security, ticketing system and the rolling stock. On 11 May 2022, Southern Railway granted in-principle approval for the Chennai Metro to takeover the MRTS.

The cost for the second phase was estimated at ₹63,000 crore (US$7.9 billion) with the project funded by the government and the lending agencies. JICA has sanctioned concessional loan amounts of ₹8,877 crore (US$1.1 billion) for the project. Phase 2 is to be funded partially by JICA, AIIB, ADB and NDB. Further the blue line extension from Airport to kilambakkam is estimated at ₹4,080 crore (US$510 million).

Chennai Metro runs in standard gauge measuring 1,435 millimetres (56.5 in) and the lines are double-tracked. The rail tracks were manufactured in Brazil and the raw material was supplied by Tata Steel. The average speed of operation is 35 kilometres per hour (22 mph) and maximum speed is 80 kilometres per hour (50 mph). Chennai Metro operates trains from 4:30 AM to 11:00 PM with a frequency of one train every 4.5 minutes in peak hours and every 15 minutes in lean hours. CMRL plans to increase the frequency to one train every 2.5 minutes once footfalls reach 600,000 passengers a day.


The political career of John C. Breckinridge included service in the state government of Kentucky, the Federal government of the United States, as well as the government of the Confederate States of America. In 1857, 36 years old, he was inaugurated as Vice President of the United States under James Buchanan. He remains the youngest person to ever hold the office. Four years later, he ran as the presidential candidate of a dissident group of Southern Democrats, but lost the election to the Republican candidate Abraham Lincoln.

A member of the Breckinridge political family, John C. Breckinridge became the first Democrat to represent Fayette County in the Kentucky House of Representatives, and in 1851, he was the first Democrat to represent Kentucky's 8th congressional district in over 20 years. A champion of strict constructionism, states' rights, and popular sovereignty, he supported Stephen A. Douglas's Kansas–Nebraska Act as a means of addressing slavery in the territories acquired by the U.S. in the Mexican–American War. Considering his re-election to the House of Representatives unlikely in 1854, he returned to private life and his legal practice. He was nominated for vice president at the 1856 Democratic National Convention, and although he and Buchanan won the election, he enjoyed little influence in Buchanan's administration.

In 1859, the Kentucky General Assembly elected Breckinridge to a U.S. Senate term that would begin in 1861. In the 1860 United States presidential election, Breckinridge captured the electoral votes of most of the Southern states, but finished a distant second among four candidates. Lincoln's election as President prompted the secession of the Southern states to form the Confederate States of America. Though Breckinridge sympathized with the Southern cause, in the Senate he worked futilely to reunite the states peacefully. After the Confederates fired on Fort Sumter, beginning the Civil War, he opposed allocating resources for Lincoln to fight the Confederacy. Fearing arrest after Kentucky sided with the Union, he fled to the Confederacy, joined the Confederate States Army, and was subsequently expelled from the Senate. He served in the Confederate Army from October 1861 to February 1865, when Confederate President Jefferson Davis appointed him Confederate States Secretary of War. Then, concluding that the Confederate cause was hopeless, he encouraged Davis to negotiate a national surrender. Davis's capture on May 10, 1865 effectively ended the war, and Breckinridge fled to Cuba, then Great Britain, and finally Canada, remaining in exile until President Andrew Johnson's offer of amnesty in 1868. Returning to Kentucky, he refused all requests to resume his political career and died of complications related to war injuries in 1875.

Slavery issues dominated Breckinridge's political career, although historians disagree about Breckinridge's views. In Breckinridge: Statesman, Soldier, Symbol, William C. Davis argues that, by adulthood, Breckinridge regarded slavery as evil; his entry in the 2002 Encyclopedia of World Biography records that he advocated voluntary emancipation. In Proud Kentuckian: John C. Breckinridge 1821–1875, Frank Heck disagrees, citing Breckinridge's consistent advocacy for slavery protections, beginning with his opposition to emancipationist candidates—including his uncle, Robert Jefferson Breckinridge—in the state elections of 1849.

Breckinridge's grandfather, John, owned slaves, believing it was a necessary evil in an agrarian economy. He hoped for gradual emancipation but did not believe the federal government was empowered to effect it; Davis wrote that this became "family doctrine". As a U.S. Senator, John Breckinridge insisted that decisions about slavery in Louisiana Territory be left to its future inhabitants, essentially the "popular sovereignty" advocated by John C. Breckinridge prior to the Civil War. John C. Breckinridge's father, Cabell, embraced gradual emancipation and opposed government interference with slavery, but Cabell's brother Robert, a Presbyterian minister, became an abolitionist, concluding that slavery was morally wrong. Davis recorded that all the Breckinridges were pleased when the General Assembly upheld the ban on importing slaves to Kentucky in 1833.

John C. Breckinridge encountered conflicting influences as an undergraduate at Centre College and in law school at Transylvania University. Centre President John C. Young, Breckinridge's brother-in-law, believed in states' rights and gradual emancipation, as did George Robertson, one of Breckinridge's instructors at Transylvania, but James G. Birney, father of Breckinridge's friend and Centre classmate William Birney, was an abolitionist. In an 1841 letter to Robert Breckinridge, who became his surrogate father after Cabell Breckinridge's death, John C. Breckinridge wrote that only "ignorant, foolish men" feared abolition. In an Independence Day address in Frankfort later that year, he decried the "unlawful dominion over the bodies ... of men". An acquaintance believed that Breckinridge's move to Iowa Territory was motivated, in part, by the fact that it was a free territory under the Missouri Compromise.

After returning to Kentucky, Breckinridge became friends with abolitionists Cassius Marcellus Clay, Garrett Davis, and Orville H. Browning. He represented freedmen in court and loaned them money. He was a Freemason and member of the First Presbyterian Church, both of which opposed slavery. Nevertheless, because blacks were educationally and socially disadvantaged in the South, Breckinridge concluded that "the interests of both races in the Commonwealth would be promoted by the continuance of their present relations". He supported the new state constitution adopted in 1850, which forbade the immigration of freedmen to Kentucky and required emancipated slaves to be expelled from the state. Believing it was best to relocate freedmen to the African colony of Liberia, he supported the Kentucky branch of the American Colonization Society. The 1850 Census showed that Breckinridge owned five slaves, aged 11 to 36. Heck recorded that his slaves were well-treated but noted that this was not unusual and proved nothing about his views on slavery.

Because Breckinridge defended both the Union and slavery in the General Assembly, he was considered a moderate early in his political career. In June 1864, Pennsylvania's John W. Forney opined that Breckinridge had been "in no sense an extremist" when elected to Congress in 1851. Of his early encounters with Breckinridge, Forney wrote: "If he had a conscientious feeling, it was hatred of slavery, and both of us, 'Democrats' as we were, frequently confessed that it was a sinful and an anti-Democratic institution, and that the day would come when it must be peaceably or forcibly removed." Heck discounts this statement, pointing out that Forney was editor of a pro-Union newspaper and Breckinridge a Confederate general at the time it was published. As late as the 1856 presidential election, some alleged that Breckinridge was an abolitionist.

By the time he began his political career, Breckinridge had concluded that slavery was more a constitutional issue than a moral one. Slaves were property, and the Constitution did not empower the federal government to interfere with property rights. From Breckinridge's constructionist viewpoint, allowing Congress to legislate emancipation without constitutional sanction would lead to "unlimited dominion over the territories, excluding the people of the slave states from emigrating thither with their property". As a private citizen, he supported the slavery protections in the Kentucky Constitution of 1850 and denounced the Wilmot Proviso, which would have forbidden slavery in territory acquired in the Mexican–American War. As a state legislator, he declared slavery a "wholly local and domestic" matter, to be decided separately by the residents of each state and territory. Because Washington, D.C., was a federal entity and the federal government could not interfere with property rights, he concluded that forced emancipation there was unconstitutional. As a congressman, he insisted on Congress's "perfect non-intervention" with slavery in the territories. Debating the 1854 Kansas–Nebraska Act, he explained, "The right to establish [slavery in a territory by government sanction] involves the correlative right to prohibit; and, denying both, I would vote for neither."


Meat & Livestock Australia (M&LA) is an independent company which regulates standards for meat and livestock management in Australian and international markets. Headquartered in North Sydney, Australia; M&LA works closely with the Australian government, and the meat and livestock industries. As a multi-faceted authority, M&LA has numerous roles across the financial, public and research sectors. The M&LA corporate group conducts research and offers marketing services to meat producers, government bodies and market analysts alike. Forums and events are also run by M&LA aim to provide producers with the opportunity to engage with other participants in the supply chain.

The M&LA corporate group is led by Meat and Livestock Limited (M&LA Ltd.), which is the parent company of two subsidiaries that have diverse roles in the meat and livestock industry. The Integrity System Company (ISC) and the MLA Donor Company (MDC) are wholly owned subsidiaries by M&LA. Numerous studies into Australia's livestock production and marketing are funded or operated by M&LA. The corporate group also participates in environmental initiatives alongside government authorities and other research bodies, which aim to address the contribution of the livestock industry to climate change in Australia.

In its research and data analysis capacity, M&LA generates the Eastern Young Cattle Indicator (EYCI) and supports the implementation of Meat Standards Australia (MSA) in the Australian meat industry. M&LA also conducts educational programs regarding the production and consumption of red meat. Statutory obligations which have been imposed upon M&LA by the Australian government, require the corporate group to undergo regular independent reviews of its performance and efficiency. Marketing campaigns are produced by M&LA to promote red meat consumption, however, many advertisements have been subject to criticism, regarding cultural appropriation and discrimination allegations.

The Coronavirus (COVID-19) outbreak has disrupted economic markets and production globally. The COVID-19 pandemic has also impacted the revenue of the M&LA corporate group. In the 2019–20 financial year, M&LA produced an overall revenue of A$269.7 million. M&LA experienced a 0.1% drop in revenue compared to the 2018–19 financial year, in which the corporate group accumulated a total revenue of A$269.9 million.

The COVID-19 outbreak has disrupted many of the initiatives managed by M&LA, which have consequently been cancelled or indefinitely postponed. M&LA has introduced online educational programs and social forums, which aim to educate the Australia population. Research and data analysis conducted by M&LA has also been interrupted by the pandemic, however, analysis of global markets has been undertaken by M&LA to provide information on conditions in the meat and livestock industries. M&LA aims to directly support producers through the COVID-19 pandemic by providing accessible resources regarding COVID-19 restrictions and mental health support. In 2020, the annual "Red Meat" event which is hosted by M&LA was cancelled due to COVID-19. Jason Strong, the managing director of M&LA, commented on the cancellation: "large events such as Red Meat are just not feasible in the current environment and so the only sensible course of action was to cancel for 2020."

Despite this cancellation, the M&LA Annual General Meeting (AGM) for 2020 is projected to be held online.

The COVID-19 outbreak has made collecting data and statistics from local and global markets more difficult. Due to COVID-19 restrictions and reduced access to data, M&LA temporarily ceased production of the EYCI between March and June 2020. Following the easing of COVID-19 restrictions throughout Australia, the market indicator returned in the last week of June 2020. M&LA aims to continue providing producers and market analysts with data on international market conditions by implementing studies in foreign markets, which are of interest to Australian producers in terms of meat export volumes. In 2018–19, Australia exported 72% of all beef and veal production, and China accounted for 24% of Australia's beef exports in 2019. M&LA conducted consumer research in China to analyse consumer behaviour and growth trends during the COVID-19 pandemic. The findings from the study indicated a continued increase in consumer demand for red meat in China, with demand for Australian beef increasing by 43% in Chinese markets during the pandemic. These studies seek to improve producer confidence and provide data for market analysts during the COVID-19 pandemic.


Archaic Greece was the period in Greek history lasting from circa 800 BC to the second Persian invasion of Greece in 480 BC,[1] following the Greek Dark Ages and succeeded by the Classical period. In the archaic period, Greeks settled across the Mediterranean and the Black Seas, as far as Marseille in the west and Trapezus (Trebizond) in the east; and by the end of the archaic period, they were part of a trade network that spanned the entire Mediterranean.

The archaic period began with a massive increase in the Greek population and of significant changes that rendered the Greek world at the end of the 8th century entirely unrecognisable from its beginning. According to Anthony Snodgrass, the archaic period was bounded by two revolutions in the Greek world. It began with a "structural revolution" that "drew the political map of the Greek world" and established the poleis, the distinctively Greek city-states, and it ended with the intellectual revolution of the Classical period.

The archaic period saw developments in Greek politics, economics, international relations, warfare and culture. It laid the groundwork for the Classical period, both politically and culturally. It was in the archaic period that the Greek alphabet developed, the earliest surviving Greek literature was composed, monumental sculpture and red-figure pottery began in Greece and the hoplite became the core of Greek armies.

In Athens, the earliest institutions of democracy were implemented under Solon, and the reforms of Cleisthenes at the end of the archaic period brought in Athenian democracy as it was during the Classical period. In Sparta, many of the institutions credited to the reforms of Lycurgus were introduced during the archaic period, the region of Messenia was brought under Spartan control, helotage was introduced and the Peloponnesian League was founded and made Sparta a dominant power in Greece.

The word archaic derives from the Greek word archaios, meaning 'old', and refers to the period in ancient Greek history before the classical period. The archaic period is generally considered to have lasted from the beginning of the 8th century BC until the beginning of the 5th century BC, with the foundation of the Olympic Games in 776 BC and the Second Persian invasion of Greece in 480 BC forming notional starting and ending dates. The archaic period was long considered to have been less important and historically interesting than the classical period and was studied primarily as a precursor to it. More recently, archaic Greece has come to be studied for its own achievements. With this reassessment of the significance of the archaic period, some scholars have objected to the term archaic because of its connotations in English of being primitive and outdated. No term which has been suggested to replace it has gained widespread currency, however, and the term is still in use.

Much evidence about the Classical period of ancient Greece comes from written histories, such as Thucydides's History of the Peloponnesian War. By contrast, no such evidence survives from the archaic period. Surviving contemporary written accounts of life in the period are in the form of poetry. Other written sources from the archaic period include epigraphical evidence, including parts of law codes, inscriptions on votive offerings and epigrams inscribed on tombs. However, none of that evidence is in the quantity for which it survives from the classical period.[8] What is lacking in written evidence is made up for in the rich archaeological evidence from the archaic Greek world. Indeed, although much knowledge of Classical Greek art comes from later Roman copies, all surviving archaic Greek art is original.

Other sources for the archaic period are the traditions recorded by later Greek writers such as Herodotus. However, those traditions are not part of any form of history that would be recognised today. Those transmitted by Herodotus were recorded whether or not he believed them to be accurate. Indeed, Herodotus did not even record any dates before 480 BC.

The Greek population doubled during the eighth century, resulting in more and larger settlements than previously. The largest settlements, such as Athens and Knossos, might have had populations of 1,500 in 1000 BC; by 700 they might have held as many as 5,000 people. This was part of a wider phenomenon of population growth across the Mediterranean region at this time, which may have been caused by a climatic shift that took place between 850 and 750, which made the region cooler and wetter. This led to the expansion of population into uncultivated areas of Greece and was probably also a driver for colonisation abroad.

Ancient sources give us little information on mortality rates in archaic Greece, but it is likely that not many more than half of the population survived to the age of 18: perinatal and infant mortality are likely to have been very high. The population of archaic Greece would have consequently been very young – somewhere between two-fifths and two-thirds of the population might have been under 18. By contrast, probably less than one in four people were over 40, and only one in 20 over the age of 60.

Evidence from human remains shows that the average age at death increased over the archaic period, but there is no clear trend for other measures of health. The size of houses gives some evidence for prosperity within society; in the eighth and seventh centuries, the average house size remained constant around 45–50 m2, but the number of very large and very small houses increased, indicating increasing economic inequality. From the end of the seventh century, this trend reversed, with houses clustering closely around a growing average, and by the end of the archaic period the average house size had risen to about 125 m2.


Sale el Sol (English: The Sun Comes Out) is the ninth studio album by Colombian singer and songwriter Shakira, released on 19 October 2010, by Epic Records. The album marks a return to Shakira's signature Latin pop sound after the electropop record She Wolf (2009). The singer split the album into three musical "directions": a romantic side, a "rock and roll" side, and a "Latino, tropical" side. The latter two "directions" experiment with rock and merengue music, respectively. As co-producer, Shakira enlisted collaborators including Josh Abraham, El Cata, Gustavo Cerati, John Hill, Lester Mendez, and Residente from Calle 13.

Five singles were released from Sale el Sol. The lead single "Loca" peaked atop the record charts of Italy, Spain, and Switzerland and the Billboard Hot Latin Songs chart in the United States. The third single, "Rabiosa," reached top ten positions in Austria, Belgium, Italy and Spain. The other singles achieved moderate chart success in Hispanic regions. Shakira embarked on The Sun Comes Out World Tour in late-2010 to promote the album.

At the 2011 Latin Grammy Awards ceremony, Sale el Sol won the award for Best Female Pop Vocal Album and was also nominated for Album of the Year. A success throughout Europe and Latin America, the album reached number one on the charts in Belgium, Croatia, France, Mexico, Portugal and Spain. In the United States, it debuted at number seven on the Billboard 200 chart and at number one on both the Top Latin Albums and Latin Pop Albums charts. Sale el Sol attained numerous record certifications in several regions across the globe, including multi-platinum certifications in Italy, Mexico, Spain, Switzerland and Poland, and diamond certifications in Brazil, France, Colombia and United States (Latin).

Sale el Sol is considered to be Shakira's return to her "roots" and is a "fusion between rock and pop heavily influenced from Latino and Colombian music". Shakira said there are three "directions" of Sale el Sol: a romantic one, a "very rock and roll" one, and a "Latino, tropical" one. Explaining the romantic "direction" of the album, she said that it was something "which I hadn't tapped into for the past three years, but it suddenly came to me and I couldn't hold it back. So it’s [the album has] got songs that are very intense, very romantic [sic]". Examples include ballads like "Antes de las Seis" ("Before Six O'Clock") and "Lo Que Mas" ("The Most"); in the former Shakira delivers "sad, emotional, and heartfelt vocals,"[15] while in the latter she sings over a piano and string-supplemented melody. About the rock and roll "direction" of the album, Shakira said "I started my career as a rock artist and then I kind of crossed over into pop, so it’s been fun to re-encounter that side of my artistic personality".

The title track is an acoustic guitar-driven alternative rock and Latin pop-infused song, while "Devoción" ("Devotion") is a techno-influenced alternative rock track in which Shakira "beats all U2-inspired arena rockers at their own game," according to AllMusic critic Stephen Thomas Erlewine. The "sultry, energetic, bass-laden" "Tu Boca" ("Your Mouth") finds influences from new wave music. "Islands" is a cover of the original song of the same name by English indie pop band The xx. Shakira adds a few house music elements to the original art pop song.

The "Latino" and tropical side of the album is prominently influenced by merengue music. The genre is characterized by the use of the accordion and the percussion instrument tambora. "Loca" ("Crazy"), is Shakira's interpretation of El Cata's song "Loca Con Su Tiguere", and is composed of horn-heavy merengue beats set over techno dance percussion beats. Similarly, "Rabiosa" ("Rabid") is Shakira's interpretation of El Cata's song "La Rabiosa", and is a fast-paced merengue-influenced dance track. In addition to merengue, songs like "Addicted to You", which features "bilingual lyrics, a very 70's chorus and Copacabana sounds", are influenced by reggaeton music. "Gordita" ("Chubby"), a duet between Residente Calle 13 and Shakira, is a cumbia and Latin rap hybrid.

Talking about the album's lyrical content, Shakira said that there are some songs "that are just to dance to in a club, that don’t have a big transcendence". In "Rabiosa", Shakira sings about her partner's sex appeal. "Loca" expresses Shakira's erratic and obsessive behaviour towards her lover, more so than his other leading lady. However, Shakira also said that there are some songs which "will remain in people’s hearts and people’s consciousness, sometimes forever". She described these tracks as "songs that have the power to feed people’s relationships and states of mind and states of spirit". According to Billboard, the title track is composed of "evocative and hopeful" lyrics which are dedicated to Argentine singer-songwriter and Shakira's friend Gustavo Cerati, who had been in a coma around the time of the release of the album. "Antes de las Seis" deals with issues of longing, regrets and loneliness. Shakira said these songs are written "in such a personal and intimate way that at that moment. I'm not really thinking much. I'm just letting it all out".


The Programme for International Student Assessment has had several runs before the most recent one in 2012. The first PISA assessment was carried out in 2000. The results of each period of assessment take about one year and a half to be analysed. First results were published in November 2001. The release of raw data and the publication of technical report and data handbook only took place in spring 2002. The triennial repeats follow a similar schedule; the process of seeing through a single PISA cycle, start-to-finish, always takes over four years. 470,000 15-year-old students representing 65 nations and territories participated in PISA 2009. An additional 50,000 students representing nine nations were tested in 2010.

Every period of assessment focuses on one of the three competence fields of reading, math, science; but the two others are tested as well. After nine years, a full cycle is completed: after 2000, reading was again the main domain in 2009.

The results for PISA 2003 were released on 14 December 2004. This PISA cycle tested 275,000 15 year-olds on mathematics, science, reading and problem solving and involved schools from 30 OECD member countries and 11 partner countries. Note that for Science and Reading, the means displayed are for "All Students", but for these two subjects (domains), not all of the students answered questions in these domains. In the 2003 OECD Technical Report (pages 208, 209), there are different country means (different than those displayed below) available for students who had exposure to these domains.

The results for the first cycle of the PISA survey were released on 14 November 2001. 265,000 15 year-olds were tested in 28 OECD countries and 4 partner countries on mathematics, science and reading. An additional 11 countries were tested later in 2002.

The correlation between PISA 2003 and TIMSS 2003 grade 8 country means is 0.84 in mathematics, 0.95 in science. The values go down to 0.66 and 0.79 if the two worst performing developing countries are excluded. Correlations between different scales and studies are around 0.80. The high correlations between different scales and studies indicate common causes of country differences (e.g. educational quality, culture, wealth or genes) or a homogenous underlying factor of cognitive competence. European Economic Area countries perform slightly better in PISA; the Commonwealth of Independent States and Asian countries in TIMSS. Content balance and years of schooling explain most of the variation.

Education professor Yong Zhao has noted that PISA 2009 did not receive much attention in the Chinese media, and that the high scores in China are due to excessive workload and testing, adding that it's "no news that the Chinese education system is excellent in preparing outstanding test takers, just like other education systems within the Confucian cultural circle: Singapore, Korea, Japan, and Hong Kong."

Students from Shanghai, China, had the top scores of every category (Mathematics, Reading and Science) in PISA 2009. In discussing these results, PISA spokesman Andreas Schleicher, Deputy Director for Education and head of the analysis division at the OECD’s directorate for education, described Shanghai as a pioneer of educational reform in which "there has been a sea change in pedagogy". Schleicher stated that Shanghai abandoned its "focus on educating a small elite, and instead worked to construct a more inclusive system. They also significantly increased teacher pay and training, reducing the emphasis on rote learning and focusing classroom activities on problem solving."

University of Copenhagen Professor Svend Kreiner, who examined in detail PISA's 2006 reading results, noted that in 2006 only about ten percent of the students who took part in PISA were tested on all 28 reading questions. "This in itself is ridiculous," Kreiner told Stewart. "Most people don't know that half of the students taking part in PISA (2006) do not respond to any reading item at all. Despite that, PISA assigns reading scores to these children."

The stable, high marks of Finnish students have attracted a lot of attention. According to Hannu Simola the results reflect a paradoxical mix of progressive policies implemented through a rather conservative pedagogic setting, where the high levels of teachers' academic preparation, social status, professionalism and motivation for the job are concomitant with the adherence to traditional roles and methods by both teachers and pupils in Finland's changing, but still quite paternalistic culture. Others advance Finland's low poverty rate as a reason for its success. Finnish education reformer Pasi Sahlberg attributes Finland's high educational achievements to its emphasis on social and educational equality and stress on cooperation and collaboration, as opposed to the competition among teachers and schools that prevails in other nations.

Of the 74 countries tested in the PISA 2009 cycle including the "+" nations, the two Indian states came up 72nd and 73rd out of 74 in both reading and mathematics, and 73rd and 74th in science. India's poor performance may not be linguistic as some suggested. 12.87% of US students, for example, indicated that the language of the test differed from the language spoken at home. while 30.77% of Himachal Pradesh students indicated that the language of the test differed from the language spoken at home, a significantly higher percent. However, unlike American students, those Indian students with a different language at home did better on the PISA test than those with the same language. India's poor performance on the PISA test is consistent with India's poor performance in the only other instance when India's government allowed an international organization to test its students and consistent with India's own testing of its elite students in a study titled Student Learning in the Metros 2006. These studies were conducted using TIMSS questions. The poor result in PISA was greeted with dismay in the Indian media. The BBC reported that as of 2008, only 15% of India's students reach high school.


"Savage" is a song by American rapper Megan Thee Stallion. It was released on March 6, 2020, as part of her EP Suga and later sent to US Top 40 radio formats on April 7, 2020, by 1501 Certified Entertainment and 300 Entertainment as the third single from the EP. The song was written by the artist with Bobby Sessions, Akeasha Boodie, and producer J. White Did It. It went viral on video-sharing app TikTok, with people performing the "Savage" dance challenge during the song's chorus.

A remix featuring Beyoncé was surprise-released on April 29, 2020, and included on Megan's debut album Good News. "Savage Remix" was met with widespread critical acclaim with praise for Megan and Beyoncé's chemistry and various delivery styles, as well as for fully transforming the song with new verses. The song reached number one on the US Billboard Hot 100 on May 26, 2020, becoming Megan Thee Stallion's first and Beyoncé's seventh number-one single on the chart. As of May 2021, the song is certified Quadruple Platinum in the US. The remix was critics' second-best song of 2020, with publications such as Lindsey Zoladz of The New York Times, Slate, and The Ringer placing the song at number one on their year-end lists. The remix received two awards at the 63rd Annual Grammy Awards for Best Rap Performance and Best Rap Song. It was also nominated for Record of the Year.

According to engineer Eddie "eMIX" Hernandez, Megan did the song "on the spot", in under an hour. Hernandez explained the recording process: "The collaboration was going on at the same time. We were building as the song was forming. While he was laying down the snares and the kicks, she was writing to the skeleton of the beat. Once he had the production all ready and sent it over to me, she was ready to go. She had all her writing done. Her recording? She knocks them things out." White said that "it didn't take me more than 10, maybe 15 minutes tops" to produce the record. White described "Savage" as a "godsend", adding: "That song came out of the air man, it came out of the air from God... It was a gift. And straight away, I told her, 'This is going to be a number one record, watch.' When you know, you know."

Candace McDuffie of Consequence of Sound noted, in the song, Megan "paints herself as 'the hood Mona Lisa' while celebrating her complexity." Megan employs huge bravado on the song, which, according to HipHopDX's Aaron McKrell, works to her advantage, as she "surgically pummels a formidable J. White Did It beat into submission, and still makes time for cool quips like \'I need a mop to clean the floor, it's too much drip, ooh\'." Complex's Jessica McKinney said the beat is "reminiscent of nostalgic hip-hop music videos set on a Miami beach, and its chorus is expressive, which is perfect for dancing."

Consequence of Sound named "Savage" as one of the essential tracks off Suga. Complex's Jessica McKinney also named it a "stand-out track" from the EP. Vulture commented that the song was "joyfully conceited", and that previous single "'B.I.T.C.H.' is a little lightweight as a first single when there's heat like 'Savage' on deck". Rob Sheffield of Rolling Stone wrote that Megan is "at her absolute peak" and "on top". Following its release, The Fader's Salvatore Maicki named "Savage" one of the "10 songs you need in your life this week", saying Megan checks all of the boxes [classy, bougie, ratchet, sassy, moody, AND nasty] and "sounds fly as fuck while doing it". Vice's Kristin Corry listed it as one of the best songs for the month of March 2020, asserting that "with a hook that acknowledges all parts of her [Megan's] identity, just like each of her EPs introduces a new persona, it's no wonder the world fell in love with it".


The nebular hypothesis is the most widely accepted model in the field of cosmogony to explain the formation and evolution of the Solar System (as well as other planetary systems). It suggests the Solar System is formed from gas and dust orbiting the Sun. The theory was developed by Immanuel Kant and published in his Universal Natural History and Theory of the Heavens (1755) and then modified in 1796 by Pierre Laplace. Originally applied to the Solar System, the process of planetary system formation is now thought to be at work throughout the universe. The widely accepted modern variant of the nebular theory is the solar nebular disk model (SNDM) or solar nebular model. It offered explanations for a variety of properties of the Solar System, including the nearly circular and coplanar orbits of the planets, and their motion in the same direction as the Sun's rotation. Some elements of the original nebular theory are echoed in modern theories of planetary formation, but most elements have been superseded.

According to the nebular theory, stars form in massive and dense clouds of molecular hydrogen—giant molecular clouds (GMC). These clouds are gravitationally unstable, and matter coalesces within them to smaller denser clumps, which then rotate, collapse, and form stars. Star formation is a complex process, which always produces a gaseous protoplanetary disk (proplyd) around the young star. This may give birth to planets in certain circumstances, which are not well known. Thus the formation of planetary systems is thought to be a natural result of star formation. A Sun-like star usually takes approximately 1 million years to form, with the protoplanetary disk evolving into a planetary system over the next 10–100 million years.

The protoplanetary disk is an accretion disk that feeds the central star. Initially very hot, the disk later cools in what is known as the T Tauri star stage; here, formation of small dust grains made of rocks and ice is possible. The grains eventually may coagulate into kilometer-sized planetesimals. If the disk is massive enough, the runaway accretions begin, resulting in the rapid—100,000 to 300,000 years—formation of Moon- to Mars-sized planetary embryos. Near the star, the planetary embryos go through a stage of violent mergers, producing a few terrestrial planets. The last stage takes approximately 100 million to a billion years.

The formation of giant planets is a more complicated process. It is thought to occur beyond the frost line, where planetary embryos mainly are made of various types of ice. As a result, they are several times more massive than in the inner part of the protoplanetary disk. What follows after the embryo formation is not completely clear. Some embryos appear to continue to grow and eventually reach 5–10 Earth masses—the threshold value, which is necessary to begin accretion of the hydrogen–helium gas from the disk. The accumulation of gas by the core is initially a slow process, which continues for several million years, but after the forming protoplanet reaches about 30 Earth masses (MEarth) it accelerates and proceeds in a runaway manner. Jupiter- and Saturn-like planets are thought to accumulate the bulk of their mass during only 10,000 years. The accretion stops when the gas is exhausted. The formed planets can migrate over long distances during or after their formation. Ice giants such as Uranus and Neptune are thought to be failed cores, which formed too late when the disk had almost disappeared.

There is evidence that Emanuel Swedenborg first proposed parts of the nebular theory in 1734.Immanuel Kant, familiar with Swedenborg's work, developed the theory further in 1755, publishing his own Universal Natural History and Theory of the Heavens, wherein he argued that gaseous clouds (nebulae) slowly rotate, gradually collapse and flatten due to gravity, eventually forming stars and planets.

Pierre-Simon Laplace independently developed and proposed a similar model in 1796 in his Exposition du systeme du monde. He envisioned that the Sun originally had an extended hot atmosphere throughout the volume of the Solar System. His theory featured a contracting and cooling protosolar cloud—the protosolar nebula. As this cooled and contracted, it flattened and spun more rapidly, throwing off (or shedding) a series of gaseous rings of material; and according to him, the planets condensed from this material. His model was similar to Kant's, except more detailed and on a smaller scale. While the Laplacian nebular model dominated in the 19th century, it encountered a number of difficulties. The main problem involved angular momentum distribution between the Sun and planets. The planets have 99% of the angular momentum, and this fact could not be explained by the nebular model. As a result, astronomers largely abandoned this theory of planet formation at the beginning of the 20th century.

A major critique came during the 19th century from James Clerk Maxwell (1831–1879), who maintained that different rotation between the inner and outer parts of a ring could not allow condensation of material. Astronomer Sir David Brewster also rejected Laplace, writing in 1876 that "those who believe in the Nebular Theory consider it as certain that our Earth derived its solid matter and its atmosphere from a ring thrown from the Solar atmosphere, which afterwards contracted into a solid terraqueous sphere, from which the Moon was thrown off by the same process". He argued that under such view, "the Moon must necessarily have carried off water and air from the watery and aerial parts of the Earth and must have an atmosphere". Brewster claimed that Sir Isaac Newton's religious beliefs had previously considered nebular ideas as tending to atheism, and quoted him as saying that "the growth of new systems out of old ones, without the mediation of a Divine power, seemed to him apparently absurd".

The perceived deficiencies of the Laplacian model stimulated scientists to find a replacement for it. During the 20th century many theories addressed the issue, including the planetesimal theory of Thomas Chamberlin and Forest Moulton (1901), the tidal model of James Jeans (1917), the accretion model of Otto Schmidt (1944), the protoplanet theory of William McCrea (1960) and finally the capture theory of Michael Woolfson. In 1978 Andrew Prentice resurrected the initial Laplacian ideas about planet formation and developed the modern Laplacian theory. None of these attempts proved completely successful, and many of the proposed theories were descriptive.

The birth of the modern widely accepted theory of planetary formation—the solar nebular disk model (SNDM)—can be traced to the Soviet astronomer Victor Safronov. His 1969 book Evolution of the protoplanetary cloud and formation of the Earth and the planets, which was translated to English in 1972, had a long-lasting effect on the way scientists think about the formation of the planets. In this book almost all major problems of the planetary formation process were formulated and some of them solved. Safronov's ideas were further developed in the works of George Wetherill, who discovered runaway accretion. While originally applied only to the Solar System, the SNDM was subsequently thought by theorists to be at work throughout the Universe; as of 1 September 2022 astronomers have discovered 5,157 extrasolar planets in our galaxy.

Use of the term "accretion disk" for the protoplanetary disk leads to confusion over the planetary accretion process. The protoplanetary disk is sometimes referred to as an accretion disk, because while the young T Tauri-like protostar is still contracting, gaseous material may still be falling onto it, accreting on its surface from the disk's inner edge. In an accretion disk, there is a net flux of mass from larger radii toward smaller radii.

However, that meaning should not be confused with the process of accretion forming the planets. In this context, accretion refers to the process of cooled, solidified grains of dust and ice orbiting the protostar in the protoplanetary disk, colliding and sticking together and gradually growing, up to and including the high-energy collisions between sizable planetesimals.

In addition, the giant planets probably had accretion disks of their own, in the first meaning of the word. The clouds of captured hydrogen and helium gas contracted, spun up, flattened, and deposited gas onto the surface of each giant protoplanet, while solid bodies within that disk accreted into the giant planet's regular moons.


In mathematics, logic, and computer science, a type theory is the formal presentation of a specific type system, and in general type theory is the academic study of type systems. Some type theories serve as alternatives to set theory as a foundation of mathematics. Two influential type theories that were proposed as foundations are Alonzo Church's typed λ-calculus and Per Martin-Löf's intuitionistic type theory. Most computerized proof-writing systems use a type theory for their foundation. A common one is Thierry Coquand's Calculus of Inductive Constructions.

Type theory was created to avoid a paradox in a mathematical foundation based on naive set theory and formal logic. Russell's paradox, which was discovered by Bertrand Russell, existed because a set could be defined using "all possible sets", which included itself. Between 1902 and 1908, Bertrand Russell proposed various "theories of type" to fix the problem. By 1908 Russell arrived at a "ramified" theory of types together with an "axiom of reducibility" both of which featured prominently in Whitehead and Russell's Principia Mathematica published between 1910 and 1913. This system avoided Russell's paradox by creating a hierarchy of types and then assigning each concrete mathematical entity to a type. Entities of a given type are built exclusively of subtypes of that type, thus preventing an entity from being defined using itself. Russell's theory of types ruled out the possibility of a set being a member of itself.

Types were not always used in logic. There were other techniques to avoid Russell's paradox. Types did gain a hold when used with one particular logic, Alonzo Church's lambda calculus.

The most famous early example is Church's simply typed lambda calculus. Church's theory of types helped the formal system avoid the Kleene–Rosser paradox that afflicted the original untyped lambda calculus. Church demonstrated that it could serve as a foundation of mathematics and it was referred to as a higher-order logic.

The phrase "type theory" now generally refers to a typed system based around lambda calculus. One influential system is Per Martin-Löf's intuitionistic type theory, which was proposed as a foundation for constructive mathematics. Another is Thierry Coquand's calculus of constructions, which is used as the foundation by Coq, Lean, and other "proof assistants" (computerized proof writing programs). Type theories are an area of active research, as demonstrated by homotopy type theory.


In 1994, the Irish Blood Transfusion Service Board (BTSB) informed the Minister for Health that a blood product they had distributed in 1977 for the treatment of pregnant mothers had been contaminated with the hepatitis C virus. Following a report by an expert group, it was discovered that the BTSB had produced and distributed a second infected batch in 1991. The Government established a Tribunal of Inquiry to establish the facts of the case and also agreed to establish a tribunal for the compensation of victims but seemed to frustrate and delay the applications of these, in some cases terminally, ill women.

This controversy also sparked an examination of the BTSB's lax procedures for screening blood products for the treatment of haemophilia and exposed the infection of many haemophiliacs with HIV, hepatitis B and hepatitis C.

The Blood Transfusion Service Board (BTSB) has responsibility for the production and supply of human blood products used for the treatment of various blood-related conditions. In 1970, it began production of anti-D human immunogloblin for the treatment of rhesus negative (blood type) mothers who, having previously given birth to rhesus positive babies, could have anti-bodies that would cause haemolytic disease (HDFN) in the foetus of future pregnancies. If, following a neo-natal blood test, the rhesus (Rh) factor of the infant is found to be incompatible with that of the mother, an anti-D injection can be given to the mother to protect her future pregnancies. If the mother were to develop her own rhesus anti-bodies, she would be required to undergo a course of plasma exchange transfusion throughout her pregnancy to reduce the level of rhesus antibodies in her blood.

In 1970 the BTSB began manufacturing anti-D human immunoglobulin for intravenous application at its Dublin laboratory using a process developed in 1967 by Professor Hans-Hermann Hoppe of Hamburg's Central Institute for Transfusionmedicine, one of the founders of the German transfusion service, StKB. The process involved the use of ion-exchange chromatography together with an ethanol precipitation, which was thought at the time to inactivate viruses that might be present in donated blood, thereby removing them from the plasma eventually fractionated in the process. In 1972 Professor Hoppe notified the BTSB that he had refined his process to include a plasma quarantine period and ultrafiltration (instead of ethanol precipitation) but the BTSB continued to use his 1967 process. By 1975 it was known that hepatitis was a blood-born disease and that multiple types of hepatitis virus were in circulation. Tests were available to identify the hepatitis A and hepatitis B viruses and although it was suspected that another strain of the virus was responsible for Jaundice in patients whose blood did not test positive for either type, there was no diagnostic test for hepatitis C until 1990.

In 1976 a pregnant woman (referred to as "Patient X" in the report of the Finlay Tribunal) was a patient of Dr. McGuinness, assistant master of the Coombe Maternity Hospital. Having had several pregnancies severely affected by haemolytic disease, Patient X was prescribed a therapeutic course of plasma exchange over a 25-week period, to reduce the antibodies that would damage her foetus. The obstetric consultant suggested to one of the BTSB staff that they could off-set the cost of Patient X's treatment by using the plasma extracted from her (which had high concentrations of anti-D) to manufacture anti-D immunoglobulin. Patient X was never asked to consent to her plasma being used in this way.

Her treatment began in September 1976 and plasma from her first two treatments was mixed with that from other donors in 5 batches of anti-D produced by the BTSB and distributed between January and April 1977. On 4 November 1976, Patient X had a reaction to her plasma exchange and her treatment was suspended temporarily. On 17 November the Coombe Hospital notified the BTSB that Patient X had become jaundiced and was diagnosed as having hepatitis.

Dr. McGuinness requested that a sample of her blood be tested for hepatitis B and sent a second sample to the Middlesex Hospital in London. These tests reported negative for hepatitis B (hepatitis C was not recognized not to mention testable at this time.) As Patient X's plasma exchange treatments continued, regular blood samples were sent to the BTSB to monitor the level of rhesus anti-bodies in her blood, each sample labelled "infective hepatitis". Despite all senior medical staff at the BTSB being aware of this infection, they continued to take plasma donations from Patient X throughout January 1977 and include these in the pools used to make 16 batches of anti-D which were distributed to maternity hospitals for administration. The number of doses in each batch could vary from 250 to 400 injections.

In July 1977, the BTSB received a report from the Rotunda Hospital that 3 mothers who had received injections from anti-D batch 238 had subsequently developed hepatitis. On 25 July, the chief biochemist of the BTSB laboratory was instructed to exclude Patient X's plasma from all pools used to manufacture anti-D. She did precisely this but did not, however, consider disposal or recall of existing batches in which Patient X's plasma had already been used and continued to distribute these to hospitals.

Samples from the 16 batches of anti-D that included Patient X's plasma and samples from the 3 Rotunda patients were sent to the Middlesex Hospital for testing, which again were inconclusive as no test for hepatitis C existed. The Scientific Committee of the BTSB began to compile a list of the destinations to which doses from anti-D batch 238 had been sent. It is unclear however, if this was completed or used in any recall operation. Between August and December 1977, the BTSB received notifications of similar cases from the maternity hospitals at the Coombe and Holles Street in Dublin indicating contamination amongst two other batches of anti-D. Despite continued notifications of hepatitis cases in 1977 and 1978, the BTSB issued no national recall of its anti-D product.


The 1960 Los Angeles Chargers season was the team's inaugural season and also the inaugural season of the American Football League (AFL). Head coach Sid Gillman led the Chargers to the AFL Western Division title with a 10–4 record, winning eight games out of nine after a 2–3 start, and qualifying to play the Houston Oilers in the AFL championship game.

The Chargers had the right to host the championship game at their home venue, the Los Angeles Memorial Coliseum. However, as the team's attendance for home games was falling below 10,000, league and television officials feared showing empty seats in the 100,000+ seat Coliseum, and they persuaded the Chargers to give up the advantage. The game was moved to Houston's Jeppesen Stadium. The teams had split their two games in the regular season, with the home teams winning, and the host Oilers were 6.5-point favorites to win the title. Down by a point after three quarters, the Chargers gave up an 88-yard touchdown in the fourth quarter and lost, 24–16.

The Chargers' poor attendance figures soon led to speculation that they might leave Los Angeles. In December, owner Barron Hilton denied that he was planning a move, but in late January he relocated the Chargers down the coast to Balboa Stadium in San Diego for the 1961 season. The team would not return to Los Angeles until 2017.

The AFL granted a Los Angeles franchise to Barron Hilton on August 14, 1959; the nickname "Chargers" was announced on October 27. Hilton's first major signing was former Notre Dame coach and administrator Frank Leahy, who became the club's first general manager on October 14 and began the search for a head coach. Leahy also employed Don Klosterman as Director of Personnel, to help sign new players.

Bob McBride, a former assistant of Leahy's at Notre Dame, was named the first Chargers head coach on November 19, but McBride changed his mind within 24 hours of the announcement and pulled out. Subsequently, Leahy had several talks with Los Angeles Rams offensive line coach Lou Rymkus about the vacancy, but Rymkus ultimately joined another AFL team, the Houston Oilers.

On December 12, Sid Gillman left the NFL's Los Angeles Rams after five years as their head coach. The Rams had reached the NFL Championship Game in Gillman's first season in charge, but went 2-10 in 1959. After his exit, Gillman considered retiring from football to become a stockbroker, but was soon lured to the AFL when approached by Hilton, signing a three-year contract on January 7, 1960, having been out of work for just 26 days.

Gillman recruited four assistant coaches in the months that followed. Both Joe Madro and Jack Faulkner had been on Gillman's staff with the Rams; they were installed as offensive line and defensive backfield coaches, respectively. Al Davis was serving as the defensive coordinator at the University of Southern California when Gillman called to offer him a post of his choosing. Davis agreed, taking over the offensive ends, as he wanted to be involved with the passing game. The group was completed on February 1 by the addition of Chuck Noll as defensive line coach. Noll had recently concluded a seven-year career with the Cleveland Browns where he had served as both offensive lineman and linebacker. Three of the coaches on this five-man team are now in the Hall of Fame: Gillman, Davis and Noll.

In July 1960, Leahy resigned as general manager due to ill health, and Gillman took over the role on top of his head coaching duties.

Los Angeles won their first regular season game with a late comeback. Dallas had touchdown drives of 60 and 94 yards either side of a Charger punt, and led 13–0 midway through the 2nd quarter. Later, Dallas had to punt from deep in their own territory, and Los Angeles took over on the Texan 46. They scored their first touchdown on the next play as Jack Kemp faked a handoff and threw a deep pass down the left sideline. Ralph Anderson caught the ball at the five and back-pedaled into the end zone. Dallas responded with an 80-yard touchdown drive, and led 20–7 at the break.

In the 3rd quarter, Los Angeles reached the Dallas eight yard line, but Kemp was sacked on 4th down and goal. They appeared to have been stopped on downs again in the 4th quarter, but Anderson had drawn a pass interference penalty, and the drive continued. Running back Paul Lowe completed a 24-yard pass to Anderson, then Kemp scrambled in from the Dallas 7 yard line, diving across the goal line with 9:38 to play.

Following a Texan three-and-out, the Chargers began the winning drive on their own 10. Penalties were again key. Dallas recovered a fumble in Charger territory, but the turnover was negated by a flag. Kemp then converted a 3rd and 15 with a 16-yard completion to Howard Clark, before Los Angeles reached a 4th and 6 from the Dallas 37 yard line. Again, Kemp's pass was incomplete, but again a pass interference call (this time drawn by Dave Kocourek) saved the drive. Five plays later, it was 3rd and goal from the four yard line, and Kemp found Howie Ferguson in the left flat for the winning score with 2:15 to play. Jimmy Sears stopped Dallas with a 4th-down interception, and the Chargers ran out the clock.

Kemp was 24 of 41 for 275 yards, two touchdowns and no interceptions. Anderson caught 5 passes for 103 yards and a touchdown; Lowe was the leading Charger rusher with just 20 yards.