Monday 25 April 2016

Have a smiling day friend

Take a Break-weekly magazine aimed at women

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Take a Break is a weekly magazine aimed at women, currently published in the United Kingdom by H Bauer Publishing, the UK subsidiary of the German-owned family business, the Bauer Media Group. It retails at 92 pence and a new issue is published every Thursday. Take a Break is the most circulated women's magazine in the United Kingdom, and the 12th most circulated overall, with estimated circulation figures at 900,016 for the second half of 2009. Circulation figures dropped below 600,000 in 2015 but the magazine remains the most circulated women's magazine in the United Kingdom. The magazine sits within the true life sector of the women's weekly market and is aimed at women who prefer to read stories about everyday women rather than celebrities. An element of the magazine is its competitions, the magazine gives away over £32,000 worth of prizes in every issue and pictures of the winners are printed in the magazine.


Take a Break is currently edited by Rebecca Fleming, the magazine has been voted Best Women's Weekly by the British Society of Magazine Editors on nine occasions, including 2007 and 2009. Take a Break has a number of brand extensions, including Take a Break's Fiction Feast which runs an annual Young Fiction Writer of the Year competition and a number of puzzle magazines. The magazine also has a website so that readers can enter competitions, sign up for one of the magazine's campaigns or send in stories online. As well as features, the magazine may feature puzzles, such as crosswords, word search, sudoku or arroword.

Close Up- influential literary magazine

Close Up was an influential literary magazine devoted to film, published by the Pool Group between 1927 and 1933. "It was the brain child of Kenneth Macpherson, a young man of independent means, not a little talent, and quite a lot of personal charm".The monthly magazine, founded at the group's 'headquarters' in Territet, Switzerland would be dedicated to "independent cinema and cinema from around the world". The first issue of Close Up, describing itself on the front cover as an "international magazine devoted to film art", appeared in July, 1927. Macpherson was editor-in-chief, with Bryher as assistant editor, and Hilda Doolittle ("H.D.") and Oswell Blakeston making regular contributions.

The publication was truly international with correspondents reporting on productions worldwide, with major literary and cinematic figures contributing articles on the latest film theory (René Crevel, Dorothy Richardson, Sergei Eisenstein, Hans Sachs, Harry Potamkin) and advertising revenue coming from Paris, Berlin, and New York.

Macpherson "dictated the tone and direction of the publication, contributing articles that defined the role of the director and defended the integrity of cinema and its right to be considered as art".Close Up would discard the vulgar entertainment films coming out of Britain and Hollywood, preferring the avant-garde productions from Germany and the Soviet Union. Blakeston, the most prolific of the magazine's writers, would mock British lack of imagination and general ineptitude. Editorial offices opened in 1928 at 24 Devonshire Street, and from April 1930 at 25 Litchfield Street, off Charing Cross Road, London, above Anton Zwemmer's bookshop and gallery.

The Academy cinema at 165 Oxford Street, which was dedicated to showing Continental and 'Unusual' art-house films, frequently advertised in its pages.

The magazine reduced its publication frequency from monthly to quarterly, eventually fizzling out in 1933 when Macpherson departed. A printed slip was attached to the flyleaf of the final December issue, requesting that in future all letters and orders should be addressed to Mr. A. Zwemmer, 87 Charing Cross Road.

Boxing News-the longest-running boxing magazine

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Boxing News is the longest-running boxing magazine still in publication, dating back to 1909. Owned by Newsquest Specialist Media (parent company: Gannett).Boxing News was founded in 1909 by original editor John Murray as, simply, Boxing. Murray had been a regular contributor to Health & Strength magazine and convinced its owner, Bill Berry (later Lord Camrose) to launch a weekly magazine dedicated solely to boxing. It is believed Murray had been inspired by Jack Johnson beating Tommy Burns to become the first black World heavyweight champion. In his first editorial, Murray stated, "Boxing will stand for good clean sport. Its success of failure is in the hands of those who believe in sport of this character. Our energies will be devoted to giving the best paper that time, thought and money can devise." When circulation began to decline in the depression days of the late 20s, the name of the magazine was changed to Boxing, Racing and Football. In October 1931, the paper was sold to a syndicate of London sportsmen, who installed Sydney Rushton, a long-time London fight reporter, as the new editor. The layout changed, the page size was increased and Rushton proved less popular than Murray. The paper was again put up for sale and, while waiting for a buyer, the old features were reinstated and there was no official Editor. Another set of sportsmen bought the paper and Godfrey Williams was named editor. He attempted to run Boxing as a newspaper, cutting popular features and reducing news stories down to the shortest possible length. The circulation quickly dropped to its lowest ever.


Billy Masters, a city printer and huge boxing fan, saved the paper, appointing W.H. Millier as the new editor. He completely reinvigorated the magazine, helped in no small measure by its first colour cover.

In 1935, Millier departed and the owner replaced him with Sydney Ackland, who had previously worked as John Murray's assistant editor and had been taught by him. World War II brought many changes as first Sydney, then replacement Stanley Nelson, contributed to the war effort. Murray made a popular comeback as editor but ill health forced him to step down in 1941. Gilbert Odd took over until the building housing the paper was destroyed by the enemy. Odd was then called up for national service and both Masters and Murray served further terms. Now with the new name of Boxing News, the paper was bought by Australian publicist Vivian Brodzky and former promoter Sydney Hulls. Northern sports writer Bert Callis was the new editor. Odd took over for a second term upon Callis’ retirement. Odd implemented the tradition of reporting the results and fighters' weights for every single fight in the country. When Odd quit to write books, he was succeeded by Jack Wilson and then Tim Riley. When Brodzky died, Boxing News was sold twice in quick succession, and Graham Houston became editor in 1971, immediately broadening the range of coverage, especially in North America. Houston left in 1977 to work on morning newspapers in Canada. This prompted the appointment of perhaps BN's greatest Editor of recent years, Harry Mullan. Circulation increased exponentially during the Mullan years, which doubled as a time of great change in the boxing world. Most notable new developments were the proliferation of ‘world’ titles and the increase in the number of major British promoters. Mullan was fiercely principled and tremendously well respected in the boxing fraternity. When Mullan left in October 1996, he was given this glowing tribute from then BN Publisher Peter Kravitz: "His writing stands comparison with the Lieblings, Hausers and Mailers of this century of boxing."

Assistant Editor Claude Abrams succeeded Mullan in November 1996. Boxing News was redesigned and switched to a full-colour format and become more extensive in content. In March 1999 the paper went to A3 size before reverting to A4, and increasing in size to 48 pages (from 24) in September 2005. The magazine remained the main trade paper in Britain. Abrams left BN – after 22 years – in December 2009, just three months after the publication celebrated its centenary, and was succeeded as editor by Tris Dixon.Tris left the magazine in December 2014, with Matt Christie taking over as editor.

The Anglo-Welsh Review" -literary and cultural magazine

"The Anglo-Welsh Review" was a literary and cultural magazine published in Wales between 1949 and 1988. Its original title was ″Dock Leaves″, a reference to the fact that it was published in Pembroke Dock, the town in which its founding editor Raymond Garlick lived and taught in the local school. He published an account of the early years of the magazine in 1971. The name was changed in 1957 to reflect the editor’s work in defining a tradition of writing known as ‘Anglo-Welsh Literature’, prefigured in an editorial to the magazine in 1952 expressing the hope that “someone will persuade a publishing house to put forth a badly needed anthology of Anglo-Welsh poetry”.Garlick, together with fellow founder of the magazine Roland Mathias, eventually published such an anthology.The name change also placed the magazine in a tradition with ″The Welsh Review″ (1939-1948). Roland Mathias took over the editorship in 1960 by which time, financially supported by the Welsh Arts Council, it had become more substantial both in terms of the number of pages and the breadth of its coverage of Welsh cultural life. The magazine was subsequently edited by Gillian Clarke who joined Roland Mathias as Reviews Editor in 1973 and became its editor in 1976. Greg Hill joined her as Reviews Editor in 1980 and himself became editor in 1985.

The growth of the book review section indicates an attempt to provide a coverage of all aspects of Welsh life but also enabled a series of reviews editors to take on a substantial editorial role and gradually move to co-editing before taking over as main editors. This process is well documented in memoirs by Gillian Clarke  Roland Mathias  and Greg Hill.The magazine had been printed since its early days and eventually published by Five Arches Press and ceased publication in 1988 following a review of franchise arrangements linking Welsh Arts Council funded publications with printers. Following this review the publication grant was awarded to a consortium including The Welsh Academy for a magazine which has since been published as New Welsh Review.

Amstrad Action-monthly magazine, published in the United Kingdom

Amstrad Action was a monthly magazine, published in the United Kingdom, which catered to owners of home computers from the Amstrad CPC range and later the GX4000 console.

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It was the first magazine published by Chris Anderson's Future Publishing, which with a varied line-up of computing and non-computing related titles has since become one of the foremost magazine publishers in the UK.


The publication, often abbreviated to AA by staff and readers, had the longest lifetime of any Amstrad magazine, running for 117 issues from October 1985 until June 1995 - long after the CPC had ceased production and games were no longer available.
Published by Future plc, a company set up by Chris Anderson (ex-Personal Computer Games and Zzap!64 editor). Launch Editor, Peter Connor, also an ex-PCG staff member, shared the writing duties with the only other staff writer, Bob Wade. Bob, another ex-PCG/Zzap!64 staff member,was given the title ‘Software Editor’ and would review the vast majority of the games featured, with Peter given a second opinion. Trevor Gilham, Art Editor, would complete the four man team.

Issue 1 dated October 1985 was released in September 1985 with the cover price of £1; 1p for every one of the 100 pages. It took the new publication a few issues to find its readers, but with the help of a bumper 116 page Christmas 1985 issue with a cover mounted tape, the circulation figures grew rapidly. In October 1986 Amstrad Action split into three separate publications. AA still catered for the CPC range, while 8000 Plus and PC Plus focused on the Amstrad PCW and PC range respectively.

AA eventually gave in to reader’s pleas to have a permanent cover tape. An announcement was made, in AA66, that the following issue would not only include a cover tape, but contain more colour and be printed on different paper. Review pages were also slightly re-designed.

In April 1992 the Audit Bureau of Circulation figures showed an increase to 37,120, the highest circulation since July–December 1988’s 38,457.

AA100 looked at the top 100 products for the CPC and took a trip down memory lane, looking back at past editors and staff. As circulation figures wound down further still there was a drastic drop in page numbers from 60 to 36 in July 1994's AA106. More compact issues mean no superfluous columns or features. AA107 became the first issue with only one member of official staff.

In AA111 there was no credits list, but the new editor, Karen Levell, answered the Reaction letters and confirmed her appointment. Although everything appeared as normal in June 1995's AA117, with AA118 advertised in the next month box, this was the last AA ever. The last ever headline (on issue AA117) was Publish and be Damned.

Sunday 24 April 2016

In Indian past history there was many untouchable groups lived. Have now also ?

Untouchability is the low status of certain social groups confined to menial and despised jobs. It is usually associated with the Hindu caste system, but similar groups exist outside Hinduism, for example the Burakumin in Japan, Blacks in South Africa, and Hutu and Twa of Rwanda.At the beginning of the twenty-first century there were over 160 million untouchables on the Indian subcontinent.

The earliest of the Hindu scriptures, the Rig Veda (10.90.11-12), describes a society divided into four varnas ("colors" or castes): Brahman (poet-priest), Kshatriya (warrior-chief), Vaishya (traders), and Shudras (menials, servants). The four basic divisions of society had their roots in the Vedic era (1500-800 BCE) and assumed definitive form by the sixth century BCE. The idea is further developed in the Laws of Manu (200 BCE-200 CE). The first three varnas are known as the twice-born, all of whom undergo a ceremony in their youth admitting them into high status.

The varna caste division excluded the Untouchables, who were and are below the Shudras in any ranking, despised because they engaged in occupations that were considered unclean and polluting. Untouchable castes became a category as avarnas, without varna, probably sometime after the fourth century CE. The untouchables (ćaṇḍālas) are mentioned in the Upanishads and early Buddhist literature, as a "fifth caste" resulting from the polluting contact of Shudra males and Brahmana females.

Parallel to the varnas and outside scripture were jatis, meaning "by birth" and also translated as castes. A jati is an endogamy group, sharing many customs and often an occupation, usually based in one language area. There were hundreds of jatis within each varna, and while untouchables were avarna, they were members of specific jatis. Jatis preceded Aryan social division of society and by being grafted on to the Aryan concept of social order (varna), have acquired Brahman-caste sanction.

The varna model of social ranking persisted throughout the Hindu subcontinent for over millennia. Beliefs about pollution generally regulated all relations between castes. Members were not allowed to marry outside their caste; there were strict rules about the kind of food and drink one could accept and from what castes; and there were restrictions on approaching and visiting members of another caste. Violations of these rules entailed purification rites and sometimes expulsion from the caste. This hierarchical society was justified with traditional Hindu religious beliefs about samsara (reincarnation) and karma (quality of actions). A person's position in this life was determined by his or her actions in previous lives. Persons who were born in a Brahman family must have performed good deeds in their earlier lives. Being born a Shudra or an Untouchable was punishment for the sinful acts committed in previous lives.

Untouchables were confined to menial, despised jobs, working as sweepers, gutter and latrine cleaners, scavengers, watchmen, farm laborers, rearers of unclean animals such as pigs, and curers of hides. They were denied access to Hindu temples, were not allowed to read religious Sanskrit books and remained illiterate, could not use village wells and tanks, were forced to live in settlements outside the village, and were forbidden to enter the residential areas of the upper castes. Burning ghat workers and executioners are two of the occupations still considered most polluting. The seventh century Chinese traveler Xuanzang listed butchers, fishermen, public performers, executioners, and scavengers as marked castes living outside the city. Anything to do with a dead cow or its hide is the work only of untouchables. A caste of drummers in the south known as the Parayan contributed the word pariah (outcaste) to English. In this case, the drumhead made of hide is polluting.

For most Indians, especially those who live in rural areas (73% of the Indian population is still rural), caste factors are an integral part of their daily lives. In many parts of the country Untouchables are not allowed inside temples and cannot use village water wells. Marriages are generally arranged between persons of the same caste. Deferential bodily movements and speech patterns in the presence of members of the upper castes have governed the appropriate conduct of untouchables in public, and have frequently forbidden them the use of various markers of honor and status, from modes of transport such as elephants, horses, and palanquins to apparel and accessories such as upper-body garments, turbans, and shoes.

Toward the end of the nineteenth century, the British began recording and codifying caste, and more untouchable castes based usually on occupation emerged: Bhangis or removers of human waste in the north; Doms, the caretakers of the extensive burning grounds in the holy city of Benaras (Varanasi); Dhobis, laundrymen who handle polluted clothing; Mahar and Chamar. However, occupation is not always a reliable guide. Laundrymen (Dhobis) and barbers may be untouchables in certain areas of the north but not in the state of Maharashtra.

In 1935, the new term "scheduled castes", those on a list or schedule, was applied to 429 castes. By 1993 the number had grown to 4,635, including sub-castes and small castes. Harijan ("children of God", a term coined by Gandhi) became the most popular word for the general public, replacing the terms "depressed classes", "exterior castes", "out-castes", and "untouchables".

The British granted special political representation to the Untouchables, who had become politically mobilized under the leadership of Bhimrao Ramji Ambedkar. Ambedkar, a convert from Hinduism to Buddhism, held that the Untouchables had been Buddhists isolated and despised when Brahmanism became dominant about the fourth century. While Ambedkar pursued legal and political means of securing Untouchable's rights, Gandhi opposed those measures as too divisive, condemning "untouchable" without renouncing the varna concept of caste.

After India became independent from British rule in 1947, a new Constitution was adopted, which abolished "untouchable" and prohibited discrimination in public places. In addition, special places were reserved for Untouchables in higher educational institutions, government services, and in the lower houses of the central and state legislatures. A small proportion of Untouchables have managed to gain entry into the middle class as school teachers, clerks, bank tellers, typists, and government officials. However, most politicians belonging to the Untouchable community have little say in party matters and government policy making. The majority of Untouchables remain landless agricultural laborers, powerless, desperately poor, and illiterate.

Since the 1970s, the name Dalit ("ground down", "broken up", as in the title "Broken People") has replaced the words "untouchable" and "harijan" in most public pronouncements and the press. Young men who called themselves Dalit Panthers in imitation of the Black Panthers in the United States are no longer active.

Other oppressed castes, who belong mainly to the Shudra caste and form about 50% of the country's population, have demanded from the government benefits similar to those available to Dalits in government service and educational institutions, leading to discontent among the upper castes.

A Dalit political party, the Bahujan Samaj Party ("party of the majority"), founded in 1984 by Kanshi Ram, an untouchable Sikh, is particularly strong in the northern Indian state of Uttar Pradesh where they received 20.61% of the votes in the 1996 general elections. Mayawati, a Chamar woman, served three terms as chief minister of Uttar Pradesh. However, at the national level, the party has captured only 11 seats (3.64% of the votes) in the 1996 general elections.

In the 1990s there were numerous instances of violence between the middle peasant castes and Dalits in rural areas.

Sunday 17 April 2016

Comet Hale–Bopp - most widely observed of the 20th century

Comet Hale–Bopp (formally designated C/1995 O1) is a comet that was perhaps the most widely observed of the 20th century and one of the brightest seen for many decades. It was visible to the naked eye for a record 18 months, twice as long as the previous record holder, the Great Comet of 1811.
Hale–Bopp was discovered on July 23, 1995, at a great distance from the Sun, raising expectations that the comet would brighten considerably by the time it passed close to Earth. Although predicting the brightness of comets with any degree of accuracy is very difficult, Hale–Bopp met or exceeded most predictions when it passed perihelion on April 1, 1997. The comet was dubbed the Great Comet of 1997.The comet was discovered independently on July 23, 1995 by two observers, Alan Hale and Thomas Bopp, both in the United States.

Hale had spent many hundreds of hours searching for comets without success, and was tracking known comets from his driveway in New Mexico when he chanced upon Hale–Bopp just after midnight. The comet had an apparent magnitude of 10.5 and lay near the globular cluster M70 in the constellation of Sagittarius.Hale first established that there was no other deep-sky object near M70, and then consulted a directory of known comets, finding that none were known to be in this area of the sky. Once he had established that the object was moving relative to the background stars, he emailed the Central Bureau for Astronomical Telegrams, the clearing house for astronomical discoveries.

Bopp did not own a telescope. He was out with friends near Stanfield, Arizona observing star clusters and galaxies when he chanced across the comet while at the eyepiece of his friend's telescope. He realized he might have spotted something new when, like Hale, he checked his star maps to determine if any other deep-sky objects were known to be near M70, and found that there were none. He alerted the Central Bureau for Astronomical Telegrams through a Western Union telegram. Brian G. Marsden, who had run the bureau since 1968, laughed, "Nobody sends telegrams anymore. I mean, by the time that telegram got here, Alan Hale had already e-mailed us three times with updated coordinates."

The following morning, it was confirmed that this was a new comet, and it was given the designation C/1995 O1. The discovery was announced in International Astronomical Union circular 6187.

The comet may have been observed by ancient Egyptians during the reign of pharaoh Pepi I (2332–2283 BC). In Pepi's pyramid in Saqqara is a text referring to an "nhh-star" as a companion of the pharaoh in the heavens, where "nhh" is the hieroglyph for long hair.Hale–Bopp's orbital position was calculated as 7.2 astronomical units (AU) from the Sun, placing it between Jupiter and Saturn and by far the greatest distance from Earth at which a comet had been discovered by amateurs. Most comets at this distance are extremely faint, and show no discernible activity, but Hale–Bopp already had an observable coma. An image taken at the Anglo-Australian Telescope in 1993 was found to show the then-unnoticed comet some 13 AU from the Sun, a distance at which most comets are essentially unobservable. (Halley's Comet was more than 100 times fainter at the same distance from the Sun.)Analysis indicated later that its comet nucleus was 60±20 kilometres in diameter, approximately six times the size of Halley.

Its great distance and surprising activity indicated that comet Hale–Bopp might become very bright indeed when it reached perihelion in 1997. However, comet scientists were wary – comets can be extremely unpredictable, and many have large outbursts at great distance only to diminish in brightness later. Comet Kohoutek in 1973 had been touted as a 'comet of the century' and turned out to be unspectacular.Hale–Bopp became visible to the naked eye in May 1996, and although its rate of brightening slowed considerably during the latter half of that year,scientists were still cautiously optimistic that it would become very bright. It was too closely aligned with the Sun to be observable during December 1996, but when it reappeared in January 1997 it was already bright enough to be seen by anyone who looked for it, even from large cities with light-polluted skies.

The Internet was a growing phenomenon at the time, and numerous websites that tracked the comet's progress and provided daily images from around the world became extremely popular. The Internet played a large role in encouraging the unprecedented public interest in comet Hale–Bopp.

As the comet approached the Sun, it continued to brighten, shining at 2nd magnitude in February, and showing a growing pair of tails, the blue gas tail pointing straight away from the Sun and the yellowish dust tail curving away along its orbit. On March 9, a solar eclipse in China, Mongolia and eastern Siberia allowed observers there to see the comet in the daytime. Hale–Bopp had its closest approach to Earth on March 22, 1997 at a distance of 1.315 AU.

As it passed perihelion on April 1, 1997 the comet developed into a spectacular sight. It shone brighter than any star in the sky except Sirius, and its dust tail stretched 40–45 degrees across the sky. The comet was visible well before the sky got fully dark each night, and while many great comets are very close to the Sun as they pass perihelion, comet Hale–Bopp was visible all night to northern hemisphere observers.
The comet likely made its previous perihelion 4,200 years ago.The comet's orbit is almost perpendicular to the plane of the ecliptic, which ensures that close approaches to planets are rare. However, in April 1996 the comet passed within 0.77 AU of Jupiter, close enough for its orbit to be affected by the planet's gravity.The comet's orbit was shortened considerably to a period of roughly 2,533 years,and it will next return to the inner Solar System around the year 4385.Its greatest distance from the Sun (aphelion) will be about 370 AU,reduced from about 525 AU.

Over many orbits, the cumulative effect of gravitational perturbations on comets with high orbital inclinations and small perihelion distances is generally to reduce the perihelion distance to very small values. Hale–Bopp has about a 15% chance of eventually becoming a sungrazing comet through this process.

It has been calculated that the previous visit by Hale–Bopp occurred in July 2215 BC. The comet may have presented a similar sight to people then, as the estimated closest approach to Earth was 1.4 AU, but no records of it have survived. Hale–Bopp may have had a near collision with Jupiter in early June 2215 BC, which probably caused a dramatic change in its orbit, and 2215 BC may have been its first passage through the inner Solar System.

The estimated probability of Hale-Bopp's striking Earth in future passages through the inner Solar System is remote, about 2.5×10−9 per orbit.However, given that the comet nucleus is around 60 km in diameter, the consequences of such an impact would be apocalyptic. Weissman conservatively estimates the diameter at 35 km; an estimated density of 0.6 g/cm3 then gives a cometary mass of 1.3×1019 g. At a probable impact velocity of 52.5 km/s, impact energy can be calculated as 1.9×1032 ergs, or 4.4×109 megatons, about 44 times the estimated energy of the K-T impact even

PC World, stylized PCWorld -global computer magazine

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PC World, stylized PCWorld, is a global computer magazine published monthly by IDG.Since 2013 it has been an online-only publication. It offers advice on various aspects of PCs and related items, the Internet, and other personal-technology products and services. In each publication, PC World reviews and tests hardware and software products from a variety of manufacturers, as well as other technology related devices such as still and video cameras, audio devices and televisions.


The current editor of PC World is Jon Phillips, formerly of Wired. In August 2012, he replaced Steve Fox, who had been editorial director since the December 2008 issue of the magazine. Fox replaced the magazine's veteran editor Harry McCracken, who resigned that spring,after some rocky times, including quitting and being rehired over editorial control issues in 2007.

PC World is published under other names such as PC Advisor and PC Welt in some countries. PC World's company name is IDG Consumer & SMB, and it is headquartered in San Francisco.

Some of the non-English PC World websites now redirect to other IDG sites; for example, PCWorld.dk (Denmark) is now Computerworld.dk.
The publication was announced at the COMDEX trade show in November 1982, and first appeared on newsstands in March 1983; Felix Dennis set up Personal Computer World which he later sold to VNU, and established MacUser which he sold to Ziff Davis Publishing in the mid-eighties. PC Magazine was also acquired by Ziff Davis.

The magazine was founded by David Bunnell and Cheryl Woodard, and its first editor was Andrew Fluegelman.PC World's magazine and web site have won a number of awards from Folio, the American Society of Business Publication Editors, MIN, the Western Publications Association, and other organizations; it is also one of the few technology magazines to have been a finalist for a National Magazine Award.

Many well-known technology writers have contributed to PC World, including Steve Bass, Daniel Tynan, Christina Wood, Stephen Manes, Lincoln Spector, Stewart Alsop, David Coursey, James A. Martin, and others. Editors have included Harry Miller, Richard Landry, Eric Knorr, Phil Lemmons, Cathryn Baskin, Kevin McKean, and Harry McCracken.

In 2005 the show Digital Duo was slightly rebranded and relaunched as PC World's Digital Duo and ran for an additional 26 episodes.As of 2006, PC World's audited rate base of 750,000 made it the largest-circulation computing magazine in the world.

On July 10, 2013 owner IDG announced[8] that the magazine would cease its 30-year print run. The August 2013 issue was the last printed of PC World magazine, future issues would be digital-only.

Time (styled within the magazine as TIME)- American weekly news magazine


Time (styled within the magazine as TIME) is an American weekly news magazine published in New York City. It was founded in 1923 and for decades was dominated by Henry Luce, who built a highly profitable stable of magazines.


A European edition (Time Europe, formerly known as Time Atlantic) is published in London and also covers the Middle East, Africa and, since 2003, Latin America. An Asian edition (Time Asia) is based in Hong Kong. The South Pacific edition, which covers Australia, New Zealand and the Pacific Islands, is based in Sydney, Australia. In December 2008, Time discontinued publishing a Canadian advertiser edition.

Time has the world's largest circulation for a weekly news magazine, and has a readership of 26 million, 20 million of which are based in the United States.As of 2012, it had a circulation of 3.3 million making it the eleventh most circulated magazine in the United States reception room circuit, and the second most circulated weekly behind People. As of 2014, its circulation was 3,286,467.

Richard Stengel was the managing editor from May 2006 to October 2013, when he joined the U.S. State Department.Nancy Gibbs has been the managing editor since October 2013.
Time magazine was created in 1923 by Briton Hadden and Henry Luce, making it the first weekly news magazine in the United States.The two had previously worked together as chairman and managing editor respectively of the Yale Daily News. They first called the proposed magazine Facts. They wanted to emphasize brevity, so that a busy man could read it in an hour. They changed the name to Time and used the slogan "Take Time–It's Brief".Hadden was considered carefree and liked to tease Luce and saw Time as important but also fun, which accounted for its heavy coverage of celebrities (including politicians), the entertainment industry, and pop culture—criticized as too light for serious news.

It set out to tell the news through people, and for many decades the magazine's cover depicted a single person. The first issue of Time was published on March 3, 1923, featuring Joseph G. Cannon, the retired Speaker of the House of Representatives, on its cover; a facsimile reprint of Issue No. 1, including all of the articles and advertisements contained in the original, was included with copies of the February 28, 1938 issue as a commemoration of the magazine's 15th anniversary. The cover price was 15¢ (equivalent to $2.08 today) On Hadden's death in 1929, Luce became the dominant man at Time and a major figure in the history of 20th-century media. According to Time Inc.: The Intimate History of a Publishing Enterprise 1972–2004 by Robert Elson, "Roy Edward Larsen was to play a role second only to Luce's in the development of Time Inc". In his book, The March of Time, 1935–1951, Raymond Fielding also noted that Larsen was "originally circulation manager and then general manager of Time, later publisher of Life, for many years president of Time Inc., and in the long history of the corporation the most influential and important figure after Luce".

Around the time they were raising $100,000 from wealthy Yale alumni like Henry P. Davison, partner of J.P. Morgan & Co., publicity man Martin Egan and J.P. Morgan & Co. banker Dwight Morrow, Henry Luce, and Briton Hadden hired Larsen in 1922 – although Larsen was a Harvard graduate and Luce and Hadden were Yale graduates. After Hadden died in 1929, Larsen purchased 550 shares of Time Inc., using money he obtained from selling RKO stock which he had inherited from his father, who was the head of the Benjamin Franklin Keith theatre chain in New England. However, after Briton Hadden's death, the largest Time stockholder was Henry Luce, who ruled the media conglomerate in an autocratic fashion, "at his right hand was Larsen", Time's second-largest stockholder, according to Time Inc.: The Intimate History of a Publishing Enterprise 1923–1941. In 1929, Roy Larsen was also named a Time Inc. director and vice-president. J. P. Morgan retained a certain control through two directorates and a share of stocks, both over Time and Fortune. Other shareholders were Brown Brothers W. A. Harriman & Co., and The New York Trust Company (Standard Oil).

By the time Henry Luce died in 1967, the Time Inc. stock which Luce owned was worth about $109 million and yielded him a yearly dividend income of more than $2.4 million, according to Curtis Prendergast's The World of Time Inc: The Intimate History of a Changing Enterprise 1957–1983. The value of the Larsen family's Time stock was now worth about $80 million during the 1960s and Roy Larsen was both a Time Inc. director and the chairman of its Executive Committee, before serving as Time's vice-chairman of the board until the middle of 1979. According to the September 10, 1979 issue of The New York Times, "Mr. Larsen was the only employee in the company's history given an exemption from its policy of mandatory retirement at age 65".

After Time magazine began publishing its weekly issues in March 1923, Roy Larsen was able to increase its circulation by utilizing U.S. radio and movie theaters around the world. It often promoted both Time magazine and U.S. political and corporate interests. According to The March of Time, as early as 1924, Larsen had brought Time into the infant radio business with the broadcast of a 15-minute sustaining quiz show entitled Pop Question which survived until 1925". Then, in 1928, Larsen "undertook the weekly broadcast of a 10-minute programme series of brief news summaries, drawn from current issues of Time magazine which was originally broadcast over 33 stations throughout the United States".

Larsen next arranged for a 30-minute radio program, The March of Time, to be broadcast over CBS, beginning on March 6, 1931. Each week, the program presented a dramatisation of the week's news for its listeners, thus Time magazine itself was brought "to the attention of millions previously unaware of its existence", according to Time Inc.: The Intimate History of a Publishing Enterprise 1923–1941, leading to an increased circulation of the magazine during the 1930s. Between 1931 and 1937, Larsen's The March of Time radio program was broadcast over CBS radio and between 1937 and 1945 it was broadcast over NBC radio – except for the 1939 to 1941 period when it was not aired. People Magazine was based on Time's People page.

In 1989, when Time, Inc. and Warner Communications merged, Time became part of Time Warner, along with Warner Bros. .In 1988, Jason McManus succeeded Henry Grunwald as Editor-in-Chief and oversaw the transition before Norman Pearlstine succeeded him in 1995.

In 2000, Time magazine became part of AOL Time Warner, which reverted to the name Time Warner in 2003.In 2007, Time moved from a Monday subscription/newsstand delivery to a schedule where the magazine goes on sale Fridays, and is delivered to subscribers on Saturday. The magazine actually began in 1923 with Friday publication.

During early 2007, the year's first issue was delayed for roughly a week due to "editorial changes", including the layoff of 49 employees.

In 2009 Time announced that they were introducing a personalized print magazine, Mine, mixing content from a range of Time Warner publications based on the reader's preferences. The new magazine met with a poor reception, with criticism that its focus was too broad to be truly personal.

The magazine has an online archive with the unformatted text for every article published. The articles are indexed and were converted from scanned images using optical character recognition technology. There are still minor errors in the text that are remnants of the conversion into digital format.

Time Inc. and Apple have come to an agreement wherein U.S. subscribers to Time will be able to read the iPad versions for free, at least until the two companies sort out a viable digital subscription model.

In January 2013, Time Inc. announced that it would cut nearly 500 jobs – roughly 6% of its 8,000 staff worldwide. Although Time magazine has maintained high sales, its ad pages have declined significantly over time.

Also in January 2013, Time Inc. named Martha Nelson as the first female editor-in-chief of its magazine division. In September 2013 Nancy Gibbs was named as the first female managing editor of Time magazine.

Extinction -In biology and ecology,

In biology and ecology, extinction is the end of an organism or of a group of organisms (taxon), normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence.

The age of the Earth is about 4.54 billion years.The earliest undisputed evidence of life on Earth dates at least from 3.5 billion years ago, during the Eoarchean Era after a geological crust started to solidify following the earlier molten Hadean Eon. There are microbial mat fossils found in 3.48 billion-year-old sandstone discovered in Western Australia. Earlier physical evidences of life include graphite, a biogenic substance, in 3.7 billion-year-old metasedimentary rocks discovered in southwestern Greenland, as well as, "remains of biotic life" found in 4.1 billion-year-old rocks in Western Australia. According to one of the researchers, "If life arose relatively quickly on Earth ... then it could be common in the universe."

More than 99 percent of all species, amounting to over five billion species,That ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.

Through evolution, species arise through the process of speciation—where new varieties of organisms arise and thrive when they are able to find and exploit an ecological niche—and species become extinct when they are no longer able to survive in changing conditions or against superior competition. The relationship between animals and their ecological niches has been firmly established.A typical species becomes extinct within 10 million years of its first appearance,although some species, called living fossils, survive with virtually no morphological change for hundreds of millions of years.

Mass extinctions are relatively rare events; however, isolated extinctions are quite common. Only recently have extinctions been recorded and scientists have become alarmed at the current high rate of extinctions.Most species that become extinct are never scientifically documented. Some scientists estimate that up to half of presently existing plant and animal species may become extinct by 2100.
A species is extinct when the last existing member dies. Extinction therefore becomes a certainty when there are no surviving individuals that can reproduce and create a new generation. A species may become functionally extinct when only a handful of individuals survive, which cannot reproduce due to poor health, age, sparse distribution over a large range, a lack of individuals of both sexes (in sexually reproducing species), or other reasons.

Pinpointing the extinction (or pseudoextinction) of a species requires a clear definition of that species. If it is to be declared extinct, the species in question must be uniquely distinguishable from any ancestor or daughter species, and from any other closely related species. Extinction of a species (or replacement by a daughter species) plays a key role in the punctuated equilibrium hypothesis of Stephen Jay Gould and Niles Eldredge.

In ecology, extinction is often used informally to refer to local extinction, in which a species ceases to exist in the chosen area of study, but may still exist elsewhere. This phenomenon is also known as extirpation. Local extinctions may be followed by a replacement of the species taken from other locations; wolf reintroduction is an example of this. Species which are not extinct are termed extant. Those that are extant but threatened by extinction are referred to as threatened or endangered species.

Currently an important aspect of extinction is human attempts to preserve critically endangered species. These are reflected by the creation of the conservation status "extinct in the wild" (EW). Species listed under this status by the International Union for Conservation of Nature (IUCN) are not known to have any living specimens in the wild, and are maintained only in zoos or other artificial environments. Some of these species are functionally extinct, as they are no longer part of their natural habitat and it is unlikely the species will ever be restored to the wild.When possible, modern zoological institutions try to maintain a viable population for species preservation and possible future reintroduction to the wild, through use of carefully planned breeding programs.

The extinction of one species' wild population can have knock-on effects, causing further extinctions. These are also called "chains of extinction".This is especially common with extinction of keystone species.

chemical formula- expressing information- proportions of atoms - particular chemical compound,

A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound, using a single line of chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs. These are limited to a single typographic line of symbols, which may include subscripts and superscripts. A chemical formula is not a chemical name, and it contains no words. Although a chemical formula may imply certain simple chemical structures, it is not the same as a full chemical structural formula. Chemical formulas can fully specify the structure of only the simplest of molecules and chemical substances, and are generally more limited in power than are chemical names and structural formulas.

The simplest types of chemical formulas are called empirical formulas, which use letters and numbers indicating the numerical proportions of atoms of each type. Molecular formulas indicate the simple numbers of each type of atom in a molecule, with no information on structure. For example, the empirical formula for glucose is CH2O (twice as many hydrogen atoms as carbon and oxygen), while its molecular formula is C6H12O6 (12 hydrogen atoms, six carbon and oxygen atoms).

Sometimes a chemical formula is complicated by being written as a condensed formula (or condensed molecular formula, occasionally called a "semi-structural formula"), which conveys additional information about the particular ways in which the atoms are chemically bonded together, either in covalent bonds, ionic bonds, or various combinations of these types. This is possible if the relevant bonding is easy to show in one dimension. An example is the condensed molecular/chemical formula for ethanol, which is CH3-CH2-OH or CH3CH2OH. However, even a condensed chemical formula is necessarily limited in its ability to show complex bonding relationships between atoms, especially atoms that have bonds to four or more different substituents.

Since a chemical formula must be expressed as a single line of chemical element symbols, it often cannot be as informative as a true structural formula, which is a graphical representation of the spatial relationship between atoms in chemical compounds (see for example the figure for butane structural and chemical formulas, at right). For reasons of structural complexity, there is no condensed chemical formula (or semi-structural formula) that specifies glucose (and there exist many different molecules, for example fructose and mannose, have the same molecular formula C6H12O6 as glucose). Linear equivalent chemical names exist that can and do specify any complex structural formula (see chemical nomenclature), but such names must use many terms (words), rather than the simple element symbols, numbers, and simple typographical symbols that define a chemical formula.

Chemical formulas may be used in chemical equations to describe chemical reactions and other chemical transformations, such as the dissolving of ionic compounds into solution. While, as noted, chemical formulas do not have the full power of structural formulas to show chemical relationships between atoms, they are sufficient to keep track of numbers of atoms and numbers of electrical charges in chemical reactions, thus balancing chemical equations so that these equations can be used in chemical problems involving conservation of atoms, and conservation of electric charge.
A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element. In empirical formulas, these proportions begin with a key element and then assign numbers of atoms of the other elements in the compound, as ratios to the key element. For molecular compounds, these ratio numbers can all be expressed as whole numbers. For example, the empirical formula of ethanol may be written C2H6O because the molecules of ethanol all contain two carbon atoms, six hydrogen atoms, and one oxygen atom. Some types of ionic compounds, however, cannot be written with entirely whole-number empirical formulas. An example is boron carbide, whose formula of CBn is a variable non-whole number ratio with n ranging from over 4 to more than 6.5.

When the chemical compound of the formula consists of simple molecules, chemical formulas often employ ways to suggest the structure of the molecule. These types of formulas are variously known as molecular formulas and condensed formulas. A molecular formula enumerates the number of atoms to reflect those in the molecule, so that the molecular formula for glucose is C6H12O6 rather than the glucose empirical formula, which is CH2O. However, except for very simple substances, molecular chemical formulas lack needed structural information, and are ambiguous.

For simple molecules, a condensed (or semi-structural) formula is a type of chemical formula that may fully imply a correct structural formula. For example, ethanol may be represented by the condensed chemical formula CH3CH2OH, and dimethyl ether by the condensed formula CH3OCH3. These two molecules have the same empirical and molecular formulas (C2H6O), but may be differentiated by the condensed formulas shown, which are sufficient to represent the full structure of these simple organic compounds.

Condensed chemical formulas may also be used to represent ionic compounds that do not exist as discrete molecules, but nonetheless do contain covalently bound clusters within them. These polyatomic ions are groups of atoms that are covalently bound together and have an overall ionic charge, such as the sulfate .
Chemical formulas as described here are distinct from the far more complex chemical systematic names that are used in various systems of chemical nomenclature. For example, one systematic name for glucose is (2R,3S,4R,5R)-2,3,4,5,6-pentahydroxyhexanal. This name, interpreted by the rules behind it, fully specifies glucose's structural formula, but the name is not a chemical formula as usually understood, and uses terms and words not used in chemical formulas. Such names, unlike basic formulas, may be able to represent full structural formulas without graphs.

Hydrogen chloride -the chemical formula HCl.

The compound hydrogen chloride has the chemical formula HCl. At room temperature, it is a colorless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric humidity. Hydrogen chloride gas and hydrochloric acid are important in technology and industry. Hydrochloric acid, the aqueous solution of hydrogen chloride, is also commonly given the formula HCl.
Hydrogen chloride is a diatomic molecule, consisting of a hydrogen atom H and a chlorine atom Cl connected by a covalent single bond. Since the chlorine atom is much more electronegative than the hydrogen atom, the covalent bond between the two atoms is quite polar. Consequently, the molecule has a large dipole moment with a negative partial charge (δ−) at the chlorine atom and a positive partial charge (δ+) at the hydrogen atom. In part because of its high polarity, HCl is very soluble in water (and in other polar solvents).

Upon contact, H2O and HCl combine to form hydronium cations H3O+ and chloride anions Cl− through a reversible chemical reaction:

HCl + H2O → H3O+ + Cl−
The resulting solution is called hydrochloric acid and is a strong acid. The acid dissociation or ionization constant, Ka, is large, which means HCl dissociates or ionizes practically completely in water. Even in the absence of water, hydrogen chloride can still act as an acid. For example, hydrogen chloride can dissolve in certain other solvents such as methanol, protonate molecules or ions, and serve as an acid-catalyst for chemical reactions where anhydrous (water-free) conditions are desired.

HCl + CH3OH → CH3O+H2 + Cl−
Because of its acidic nature, hydrogen chloride is corrosive, particularly in the presence of moisture.Frozen HCl undergoes phase transition at 98.4 K. X-ray powder diffraction of the frozen material shows that the material changes from an orthorhombic structure to a cubic one during this transition. In both structures the chlorine atoms are in a face-centered array. However, the hydrogen atoms could not be located.Analysis of spectroscopic and dielectric data, and determination of the structure of DCl (deuterium chloride) indicates that HCl forms zigzag chains in the solid, as does HF
The infrared spectrum of gaseous hydrogen chloride, shown om the left, consists of a number of sharp absorption lines grouped around 2886 cm−1 (wavelength ~3.47 µm). At room temperature, almost all molecules are in the ground vibrational state v = 0. Including anharmonicity the vibrational energy can be written as.

E_\mathrm{vib}= h\nu_e\cdot\left(v + \tfrac\right)+ hx_e\nu_e\cdot\left(v+\tfrac\right)^2
To promote an HCl molecule from the v = 0 to the v = 1 state, we would expect to see an infrared absorption about νo = νe + 2xeνe = 2880 cm−1. However, this absorption corresponding to the Q-branch is not observed due to it being forbidden by symmetry. Instead, two sets of signals (P- and R-branches) are seen owing to a simultaneous change in the rotational state of the molecules. Because of quantum mechanical selection rules, only certain rotational transitions are permitted. The states are characterized by the rotational quantum number J = 0, 1, 2, 3, ... selection rules state that ΔJ is only able to take values of ±1.

E(J)_\mathrm{rot} = h \cdot B \cdot J(J+1)
The value of the rotational constant B is much smaller than the vibrational one νo, such that a much smaller amount of energy is required to rotate the molecule; for a typical molecule, this lies within the microwave region. However, the vibrational energy of HCl molecule places its absorptions within the infrared region, allowing a spectrum showing the rovibrational transitions of this molecule to be easily collected using an infrared spectrometer with a gas cell. The latter can even be made of quartz as the HCl absorption lies in a window of transparency for this material.

Naturally abundant chlorine consists of two isotopes, 35Cl and 37Cl, in a ratio of approximately 3:1. While the spring constants are identical within experimental error, the reduced masses are different causing measurable differences in the rotational energy, thus doublets are observed on close inspection of each absorption line, weighted in the same ratio of 3:1.

Saturday 16 April 2016

A white dwarf, also called a degenerate dwarf

A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: its mass is comparable to that of the Sun, while its volume is comparable to that of Earth. A white dwarf's faint luminosity comes from the emission of stored thermal energy; no fusion takes place in a white dwarf wherein mass is converted to energy. The nearest known white dwarf is Sirius B, at 8.6 light years, the smaller component of the Sirius binary star. There are currently thought to be eight white dwarfs among the hundred star systems nearest the Sun.The unusual faintness of white dwarfs was first recognized in 1910. The name white dwarf was coined by Willem Luyten in 1922.
White dwarfs are thought to be the final evolutionary state of stars whose mass is not high enough to become a neutron star, including our Sun and over 97% of the other stars in the Milky Way., §1. After the hydrogen–fusing period of a main-sequence star of low or medium mass ends, such a star will expand to a red giant during which it fuses helium to carbon and oxygen in its core by the triple-alpha process. If a red giant has insufficient mass to generate the core temperatures required to fuse carbon, around 1 billion K, an inert mass of carbon and oxygen will build up at its center. After a star sheds its outer layers and forms a planetary nebula, it will leave behind this core, which is the remnant white dwarf.Usually, therefore, white dwarfs are composed of carbon and oxygen. If the mass of the progenitor is between 8 and 10.5 solar masses (M☉), the core temperature is sufficient to fuse carbon but not neon, in which case an oxygen–neon–magnesium white dwarf may form.Stars of very low mass will not be able to fuse helium, hence, a helium white dwarf may form by mass loss in binary systems.

The material in a white dwarf no longer undergoes fusion reactions, so the star has no source of energy. As a result, it cannot support itself by the heat generated by fusion against gravitational collapse, but is supported only by electron degeneracy pressure, causing it to be extremely dense. The physics of degeneracy yields a maximum mass for a non-rotating white dwarf, the Chandrasekhar limit—approximately 1.4 M☉—beyond which it cannot be supported by electron degeneracy pressure. A carbon-oxygen white dwarf that approaches this mass limit, typically by mass transfer from a companion star, may explode as a type Ia supernova via a process known as carbon detonation.(SN 1006 is thought to be a famous example.)

A white dwarf is very hot when it forms, but because it has no source of energy, it will gradually radiate its energy and cool. This means that its radiation, which initially has a high color temperature, will lessen and redden with time. Over a very long time, a white dwarf will cool to temperatures at which it will no longer emit significant heat or light, and it will become a cold black dwarf. The length of time it takes for a white dwarf to reach this state is calculated to be longer than the current age of the universe (approximately 13.8 billion years), and it is thought that no black dwarfs yet exist. The oldest white dwarfs still radiate at temperatures of a few thousand kelvin.
The first white dwarf discovered was in the triple star system of 40 Eridani, which contains the relatively bright main sequence star 40 Eridani A, orbited at a distance by the closer binary system of the white dwarf 40 Eridani B and the main sequence red dwarf 40 Eridani C. The pair 40 Eridani B/C was discovered by William Herschel on 31 January 1783;, p. 73 it was again observed by Friedrich Georg Wilhelm Struve in 1825 and by Otto Wilhelm von Struve in 1851.In 1910, Henry Norris Russell, Edward Charles Pickering and Williamina Fleming discovered that, despite being a dim star, 40 Eridani B was of spectral type A, or white. In 1939, Russell looked back on the discovery.
Although white dwarfs are known with estimated masses as low as 0.17 M☉ and as high as 1.33 M☉,the mass distribution is strongly peaked at 0.6 M☉, and the majority lie between 0.5 to 0.7 M☉.The estimated radii of observed white dwarfs are typically 0.8–2 % the radius of the Sun;this is comparable to the Earth's radius of approximately 0.9% solar radius. A white dwarf, then, packs mass comparable to the Sun's into a volume that is typically a million times smaller than the Sun's; the average density of matter in a white dwarf must therefore be, very roughly, 1,000,000 times greater than the average density of the Sun, or approximately 106 g/cm3, or 1 tonne per cubic centimetre. A typical white dwarf has a density of between 10 7 and 1011 kg per cubic meter. White dwarfs are composed of one of the densest forms of matter known, surpassed only by other compact stars such as neutron stars, black holes and, hypothetically, quark stars.[30]

White dwarfs were found to be extremely dense soon after their discovery. If a star is in a binary system, as is the case for Sirius B or 40 Eridani B, it is possible to estimate its mass from observations of the binary orbit. This was done for Sirius B by 1910, yielding a mass estimate of 0.94 M☉. (A more modern estimate is 1.00 M☉.)Since hotter bodies radiate more energy than colder ones, a star's surface brightness can be estimated from its effective surface temperature, and that from its spectrum. If the star's distance is known, its absolute (overall) luminosity can also be estimated. From the absolute luminosity and distance, the star's surface area and its radius can be calculated. Reasoning of this sort led to the realization, puzzling to astronomers at the time, that Sirius B and 40 Eridani B must be very dense. When Ernst Öpik estimated the density of a number of visual binary stars in 1916, he found that 40 Eridani B had a density of over 25,000 times the Sun's, which was so high that he called it "impossible".As Arthur Stanley Eddington put it later in 1927

A red giant - in a late phase of stellar evolution

A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses (M☉)) in a late phase of stellar evolution. The outer atmosphere is inflated and tenuous, making the radius immense and the surface temperature low, from 5,000 K and lower. The appearance of the red giant is from yellow-orange to red, including the spectral types K and M, but also class S stars and most carbon stars.
The most common red giants are stars nearing the end of the so-called red-giant-branch (RGB) but are still fusing hydrogen into helium in a shell surrounding a degenerate helium core. Other red giants are: the red clump stars in the cool half of the horizontal branch, fusing helium into carbon in their cores via the triple-alpha process; and the asymptotic-giant-branch (AGB) stars with a helium burning shell outside a degenerate carbon–oxygen core, and sometimes with a hydrogen burning shell just beyond that.

The nearest red giant is Gamma Crucis, 88 light years away, but the orange giant Arcturus is described by some as a red giant and it is 36 light years away.
Red giants are stars that have exhausted the supply of hydrogen in their cores and switched to thermonuclear fusion of hydrogen in a shell surrounding the core. They have radii tens to hundreds of times larger than that of the Sun. However, their outer envelope is lower in temperature, giving them a reddish-orange hue. Despite the lower energy density of their envelope, red giants are many times more luminous than the Sun because of their great size. Red-giant-branch stars have luminosities about a hundred to several hundred times that of the Sun (L☉), spectral types of K or M, have surface temperatures of 3,000–4,000 K, and radii about 20–100 times the Sun (R☉). Stars on the horizontal branch are hotter, whereas asymptotic-giant-branch stars are around ten times more luminous, but both these types are less common than those of the red-giant branch.

Among the asymptotic-giant-branch stars belong the carbon stars of type C-N and late C-R, produced when carbon and other elements are convected to the surface in what is called a dredge-up.The first dredge-up occurs during hydrogen shell burning on the red-giant branch, but does not produce dominant carbon at the surface. The second, and sometimes third, dredge up occurs during helium shell burning on the asymptotic-giant branch and convects carbon to the surface in sufficiently massive stars.

The stellar limb of a red giant is not sharply-defined, contrary to their depiction in many illustrations. Rather, due to the very low mass density of the envelope, such stars lack a well-defined photosphere, and the body of the star gradually transitions into a 'corona'. The coolest red giants have complex spectra, with molecular lines, masers, and sometimes emission.

Another noteworthy feature of red giants is that, unlike Sun-like stars whose photospheres have a large number of small convection cells (solar granules), red-giant photospheres, as well as those of red supergiants, have just a few large cells, whose feature cause the variations of brightness so common on both types of stars.
Red giants are evolved from main-sequence stars with masses in the range from about 0.3 M☉ to around 8 M When a star initially forms from a collapsing molecular cloud in the interstellar medium, it contains primarily hydrogen and helium, with trace amounts of "metals" (in stellar structure, this simply refers to any element that is not hydrogen or helium i.e. atomic number greater than 2). These elements are all uniformly mixed throughout the star. The star reaches the main sequence when the core reaches a temperature high enough to begin fusing hydrogen (a few million kelvin) and establishes hydrostatic equilibrium. Over its main sequence life, the star slowly converts the hydrogen in the core into helium; its main-sequence life ends when nearly all the hydrogen in the core has been fused. For the Sun, the main-sequence lifetime is approximately 10 billion years. More-massive stars burn disproportionately faster and so have a shorter lifetime than less massive stars.

When the star exhausts the hydrogen fuel in its core, nuclear reactions can no longer continue and so the core begins to contract due to its own gravity. This brings additional hydrogen into a zone where the temperature and pressure are adequate to cause fusion to resume in a shell around the core. The higher temperatures lead to increasing reaction rates, enough to increase the star's luminosity by a factor of 1,000–10,000. The outer layers of the star then expand greatly, thus beginning the red-giant phase of the star's life. As the star expands, the energy produced in the burning shell of the star is spread over a much larger surface area, resulting in a lower surface temperature and a shift in the star's visible light output towards the red – hence it becomes a red giant. In actuality, though, the color usually is orange. At this time, the star is said to be ascending the red-giant branch of the Hertzsprung–Russell (H–R) diagram.The outer layers carry the energy evolved from fusion to the surface by way of convection. This causes material exposed to nuclear "burning" in the star's interior (but not its core) to be brought to the star's surface for the first time in its history, an event called the first dredge-up.

The evolutionary path the star takes as it moves along the red-giant branch, that ends finally with the complete collapse of the core, depends on the mass of the star. For the Sun and stars of less than about 2 M the core will become dense enough that electron degeneracy pressure will prevent it from collapsing further. Once the core is degenerate, it will continue to heat until it reaches a temperature of roughly 108 K, hot enough to begin fusing helium to carbon via the triple-alpha process. Once the degenerate core reaches this temperature, the entire core will begin helium fusion nearly simultaneously in a so-called helium flash. In more-massive stars, the collapsing core will reach 108 K before it is dense enough to be degenerate, so helium fusion will begin much more smoothly, and produce no helium flash. Once the star is fusing helium in its core, it contracts and is no longer considered a red giant. The core helium fusing phase of a star's life is called the horizontal branch in metal-poor stars, so named because these stars lie on a nearly horizontal line in the H–R diagram of many star clusters. Metal-rich helium-fusing stars instead lie on the so-called red clump in the H–R diagram.

In stars massive enough to ignite helium fusion, an analogous process occurs when the central helium is exhausted and the star collapses once again, causing helium in an outer shell to begin fusing. At the same time hydrogen may begin fusion in a shell just outside the burning helium shell. This puts the star onto the asymptotic giant branch, a second red-giant phase. The helium fusion results in the build up of a carbon–oxygen core. A star below about 8 M will never start fusion in its degenerate carbon–oxygen core. Instead, at the end of the asymptotic-giant-branch phase the star will eject its outer layers, forming a planetary nebula with the core of the star exposed, ultimately becoming a white dwarf. The ejection of the outer mass and the creation of a planetary nebula finally ends the red-giant phase of the star's evolution. The red-giant phase typically lasts only around a billion years in total for a solar mass star, almost all of which is spent on the red-giant branch. The horizontal-branch and asymptotic-giant-branch phases proceed tens of times faster.

If the star has about 0.2 to 0.5 M☉,it is massive enough to become a red giant but does not have enough mass to initiate the fusion of helium. These "intermediate" stars cool somewhat and increase their luminosity but never achieve the tip of the red-giant branch and helium core flash. When the ascent of the red-giant branch ends they puff off their outer layers much like a post-asymptotic-giant-branch star and then become a white dwarf.

The American River Review- literary journal

ARR 2010 Cover.jpgThe American River Review is a literary journal, first published in 1984, by students and faculty of American River College (ARC). An entirely student-produced magazine, the faculty at ARC facilitate in the financial and legal facets of production. Students are responsible for every creative aspect of production including writing, editing, accepting or rejecting submissions, final copy proofing, and the production of art, graphic design, and layout.

The American River Review has expanded the scope of its coverage annually. It currently showcases prose, poetry, fashion, culinary, and visual arts. The 2011 edition included a DVD featuring interviews with staff members and footage of the ARC theater department's dramatic interpretations of the literary pieces.

To date, the American River Review has received the title of Best in the Nation in the Community College Humanities Association Literary Magazine Competition on nine separate occasions. It is currently the only literary magazine in the nation to have received this award more than twice.

The American Poetry Review (APR)- American poetry magazine

The American Poetry Review (APR) is an American poetry magazine printed every other month on tabloid-sized newsprint.
The American Poetry Review September October 2003 cover.jpg
Founded in 1972 by Stephen Berg in Philadelphia, Pennsylvania. The magazine's editors are David Bonanno and Elizabeth Scanlon.The American Poetry Review was founded by Berg in 1972 in Philadelphia. The magazine lacked capital but had "significant support in the national poetry community", according to the magazine's Web site. By 1976 the publication was being produced and distributed more efficiently, making it "the most widely circulated poetry magazine ever". In 1977 the publication began paying out small salaries to editors and staff and small payments to authors.


In 2001, W.W. Norton & Co. published the anthology The Body Electric: America's Best Poetry from The American Poetry Review