Series and parallel circuits

Components of an electrical circuit or electronic circuit can be connected in many different ways. The two simplest of these are called series and parallel and occur frequently. Components connected in series are connected along a single path, so the same current flows through all of the components. Components connected in parallel are connected so the same voltage is applied to each component.

A circuit composed solely of components connected in series is known as a series circuit; likewise, one connected completely in parallel is known as a parallel circuit.

In a series circuit, the current through each of the components is the same, and the voltage across the circuit is the sum of the voltages across each component. In a parallel circuit, the voltage across each of the components is the same, and the total current is the sum of the currents through each component.

Consider a very simple circuit consisting of four light bulbs and one 6 V battery. If a wire joins the battery to one bulb, to the next bulb, to the next bulb, to the next bulb, then back to the battery, in one continuous loop, the bulbs are said to be in series. If each bulb is wired to the battery in a separate loop, the bulbs are said to be in parallel. If the four light bulbs are connected in series, there is same current through all of them, and the voltage drop is 1.5 V across each bulb, which may not be sufficient to make them glow. If the light bulbs are connected in parallel, the currents through the light bulbs combine to form the current in the battery, while the voltage drop is across each bulb and they all glow.

Taxonomic rank

In biological classification, rank is the relative level of a group of organisms (a taxon) in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, class, kingdom, etc.

A given rank subsumes under it less general categories, that is, more specific descriptions of life forms. Above it, each rank is classified within more general categories of organisms and groups of organisms related to each other through inheritance of traits or features from common ancestors. The rank of any species and the description of its genus is basic; which means that to identify a particular organism, it is usually not necessary to specify ranks other than these first two.

Consider a particular species, the red fox Vulpes vulpes: its next rank, the genus Vulpes, comprises all the 'true foxes'. Their closest relatives are in the immediately higher rank, the family Canidae, which includes dogs, wolves, jackals, all foxes, and other caniforms; the next higher rank, the order Carnivora, includes feliforms and caniforms (lions, tigers, bears, hyenas, wolverines, and all those mentioned above), plus other carnivorous mammals. As one group of the class Mammalia, all of the above are classified among those with backbones in the Chordata phylum rank, and with them among all the animals in the Animalia kingdom rank. Finally, all of the above will find their earliest relatives somewhere in their domain rank Eukarya.

Séries+

Séries+ is a Canadian French language Category A specialty channel devoted to scripted comedy and dramatic programming. The channel is owned by Corus Entertainment.

History

On May 21, 1999, Alliance Atlantis Communications (AAC) and Premier Choix Networks (a division of Astral Media) were granted approval by the Canadian Radio-television and Telecommunications Commission (CRTC) to launch a national French-language specialty television service called Canal Fiction, described as a "service devoted to drama."

The channel was launched on January 31, 2000 as Séries+ at 6pm EST.

On January 18, 2008, a joint venture between Canwest and Goldman Sachs Capital Partners known as CW Media purchased AAC and gained AAC's interest in Séries+.

On October 27, 2010, Shaw Communications completed its acquisition of Canwest and Goldman Sachs' interest in CW Media, giving it control of CW Media's 50% interest in Séries+.

On March 4, 2013, Corus Entertainment announced that it would acquire Astral Media's stakes in Séries+ and Historia, as well as several other properties, under separate transactions with the two companies. The purchase was tied to Bell Media's pending takeover of Astral Media; an earlier proposal had been rejected by the CRTC in October 2012 due to concerns surrounding its total market share following the merger, but was restructured under the condition that the companies divest certain media properties. In a separate deal, Corus also acquired Shaw's interests in Séries+ and Historia, giving it full ownership. The deals were approved by the CRTC on December 20, 2013 and Corus officially become the full owner of the channel on January 1, 2014.

203 series

The 203 series (203系) is an electric multiple unit (EMU) train type operated in Japan between 1982 and 2011 by Japanese National Railways (JNR) and later by East Japan Railway Company (JR East), and currently operated by KRL Jabodetabek in Indonesia and Philippine National Railways (PNR) in the Philippines.

Operations

The 203 series sets were on through services between the Joban Line and Tokyo Metro Chiyoda Line until they were replaced by E233-2000 series EMUs, and finally withdrawn from services in Japan in September 2011.

Formation

The sets were formed as follows.

Cars 3, 6, and 9 were each fitted with one PS21 pantograph.

Interior

Interior view, September 2007

Interior view, September 2007

Priority seating, November 2010

Priority seating, November 2010

History

Withdrawal

The trains were gradually replaced by new E233-2000 series EMUs, and the last set ran in revenue service on 26 September 2011.

Overseas operations

Indonesia

Five former 203 series sets have been sent to KRL Jabodetabek (KCJ) in Jakarta, Indonesia. All trains are in operation in the Jabodetabek area with 8 cars per set, due to the short platforms at most stations in Indonesia.