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1974 In Science
The year 1974 in science and technology involved some significant events, listed below. Astronomy and space exploration * February 8 – After 84 days in space, the last crew of the temporary American space station Skylab return to Earth. * February 13–15 – Sagittarius A*, thought to be the location of a supermassive black hole, is identified by Bruce Balick and Robert Brown using the baseline interferometer of the United States National Radio Astronomy Observatory. * November 16 – Arecibo message transmitted from Arecibo Observatory (Puerto Rico) to Messier 13. * Hawking radiation is predicted by Stephen Hawking. Computer Science * The Mark-8 microcomputer based on the Intel 8008 microprocessor is designed by Jonathan Titus. It is announced on the cover of the July 1974 issue of Radio-Electronics as "Your Personal Minicomputer". History of science * F. W. Winterbotham publishes ''The Ultra secret: the inside story of Operation Ultra, Bletchley Park and Enigma'', the firs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science
Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Science may be as old as the human species, and some of the earliest archeological evidence for scientific reasoning is tens of thousands of years old. The earliest written records in the history of science come from Ancient Egypt and Mesopotamia in around 3000 to 1200 BCE. Their contributions to mathematics, astronomy, and medicine entered and shaped Greek natural philosophy of classical antiquity, whereby formal attempts were made to provide explanations of events in the physical world based on natural causes. After the fall of the Western Roman Empire, knowledge of Greek conceptions of the world deteriorated in Western Europe during the early centuries (400 to 1000 CE) of the Middle Ages, but was preserved in the Muslim world during the Islamic Golden Age and later by the efforts of Byzantine Greek scholars who brought Greek ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intel 8008
The Intel 8008 ("''eight-thousand-eight''" or "''eighty-oh-eight''") is an early byte-oriented microprocessor designed by Computer Terminal Corporation (CTC), implemented and manufactured by Intel, and introduced in April 1972. It is an 8-bit CPU with an external 14-bit address bus that could address 16 KB of memory. Originally known as the 1201, the chip was commissioned by Computer Terminal Corporation (CTC) to implement an instruction set of their design for their Datapoint 2200 programmable terminal. As the chip was delayed and did not meet CTC's performance goals, the 2200 ended up using CTC's own TTL-based CPU instead. An agreement permitted Intel to market the chip to other customers after Seiko expressed an interest in using it for a calculator. History CTC formed in San Antonio in 1968 under the direction of Austin O. "Gus" Roche and Phil Ray, both NASA engineers. Roche, in particular, was primarily interested in producing a desktop computer. However, given the immaturi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archie Cochrane
Archibald Leman Cochrane (12 January 1909 – 18 June 1988) was a Scottish doctor noted for his book ''Effectiveness and Efficiency: Random Reflections on Health Services''. This book advocated the use of randomized control trials to make medicine more effective and efficient. His advocacy of randomized controlled trials eventually led to the development of the Cochrane Library database of systematic reviews, the establishment of the UK Cochrane Centre in Oxford and the international organisation Cochrane. He is known as one of the fathers of modern clinical epidemiology and evidence-based medicine and is considered to be the originator of the idea of evidence-based medicine in the current era. Biography Cochrane was born in Kirklands, Galashiels, Scotland, into a family he described as "industrial upper middle class". His father was killed whilst serving with the King's Own Scottish Borderers during World War I. He won a scholarship to Uppingham School, and obtained another ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perinatal
Prenatal development () includes the development of the embryo and of the fetus during a viviparous animal's gestation. Prenatal development starts with fertilization, in the germinal stage of embryonic development, and continues in fetal development until birth. In human pregnancy, prenatal development is also called antenatal development. The development of the human embryo follows fertilization, and continues as fetal development. By the end of the tenth week of gestational age the embryo has acquired its basic form and is referred to as a fetus. The next period is that of fetal development where many organs become fully developed. This fetal period is described both topically (by organ) and chronologically (by time) with major occurrences being listed by gestational age. The very early stages of embryonic development are the same in all mammals, but later stages of development, and the length of gestation varies. Terminology In the human: Different terms are used to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Controlled Trials
Clinical trials are prospective biomedical or behavioral research studies on human participants designed to answer specific questions about biomedical or behavioral interventions, including new treatments (such as novel vaccines, drugs, dietary choices, dietary supplements, and medical devices) and known interventions that warrant further study and comparison. Clinical trials generate data on dosage, safety and efficacy. They are conducted only after they have received health authority/ethics committee approval in the country where approval of the therapy is sought. These authorities are responsible for vetting the risk/benefit ratio of the trial—their approval does not mean the therapy is 'safe' or effective, only that the trial may be conducted. Depending on product type and development stage, investigators initially enroll volunteers or patients into small pilot studies, and subsequently conduct progressively larger scale comparative studies. Clinical trials can vary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frank Jobe
Frank James Jobe (July 16, 1925 – March 6, 2014) was an American orthopedic surgeon and co-founder of the Kerlan-Jobe Orthopaedic Clinic. Jobe pioneered both elbow ligament replacement and major reconstructive shoulder surgery for baseball players. In 1974, Jobe performed the first "Tommy John surgery" on then-Los Angeles Dodgers pitcher Tommy John. The procedure has become so prevalent an estimated one-third of all major league pitchers have undergone it. Jobe also performed the first major reconstructive shoulder surgery on a big league player in 1990, which allowed Dodger star Orel Hershiser to continue his career. Jobe served as a special medical adviser to the Dodgers until his death. Early life Frank Jobe was born in 1925 in Greensboro, North Carolina. After graduating from Collegedale Academy in Collegedale, Tennessee in 1943, he enlisted in the United States Army and reported to Camp Barkeley for training. Serving in World War II as a medical staff sergeant in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulnar Collateral Ligament Of Elbow Joint
The ulnar collateral ligament (UCL) or internal lateral ligament is a thick triangular ligament at the medial aspect of the elbow uniting the distal aspect of the humerus to the proximal aspect of the ulna. Structure It consists of two portions, an anterior and posterior united by a thinner intermediate portion. Note that this ligament is also referred to as the medial collateral ligament and should not be confused with the lateral ulnar collateral ligament (LUCL). The ''anterior portion'', directed obliquely forward, is attached, above, by its apex, to the front part of the medial epicondyle of the humerus; and, below, by its broad base to the medial margin of the coronoid process of the ulna. The ''posterior portion'', also of triangular form, is attached, above, by its apex, to the lower and back part of the medial epicondyle; below, to the medial margin of the olecranon. Between these two bands a few intermediate fibers descend from the medial epicondyle to blend with a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tommy John Surgery
Ulnar collateral ligament reconstruction, colloquially known as Tommy John surgery (TJS), is a surgical graft procedure where the ulnar collateral ligament in the medial elbow is replaced with either a tendon from elsewhere in the patient's body, or with one from a deceased donor. The procedure is common among collegiate and professional athletes in several sports, particularly in baseball. The procedure was devised in 1974 by orthopedic surgeon Frank Jobe, a Los Angeles Dodgers team physician who served as a special advisor to the team until his death in 2014. It is named after the first baseball player to undergo the surgery, major league pitcher Tommy John, whose record of 288 career victories ranks seventh among left-handed pitchers. The initial operation, John's successful post-surgery career, and the relationship between the two men was the subject of a 2013 ESPN ''30 for 30'' documentary. Uses The ulnar collateral ligament (UCL) can become stretched, frayed or torn thr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frey Curve
In mathematics, a Frey curve or Frey–Hellegouarch curve is the elliptic curve ::y^2 = x(x - a^\ell)(x + b^\ell) associated with a (hypothetical) solution of Fermat's equation :a^\ell + b^\ell = c^\ell. The curve is named after Gerhard Frey. History came up with the idea of associating solutions (a,b,c) of Fermat's equation with a completely different mathematical object: an elliptic curve. If ℓ is an odd prime and ''a'', ''b'', and ''c'' are positive integers such that :a^\ell + b^\ell = c^\ell, then a corresponding Frey curve is an algebraic curve given by the equation :y^2 = x(x - a^\ell)(x + b^\ell) or, equivalently :y^2 = x(x - a^\ell)(x - c^\ell). This is a nonsingular algebraic curve of genus one defined over Q, and its projective completion is an elliptic curve over Q. called attention to the unusual properties of the same curve as Hellegouarch, which became called a Frey curve. This provided a bridge between Fermat and Taniyama by showing that a counterexample ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fermat's Last Theorem
In number theory, Fermat's Last Theorem (sometimes called Fermat's conjecture, especially in older texts) states that no three positive integers , , and satisfy the equation for any integer value of greater than 2. The cases and have been known since antiquity to have infinitely many solutions.Singh, pp. 18–20. The proposition was first stated as a theorem by Pierre de Fermat around 1637 in the margin of a copy of '' Arithmetica''. Fermat added that he had a proof that was too large to fit in the margin. Although other statements claimed by Fermat without proof were subsequently proven by others and credited as theorems of Fermat (for example, Fermat's theorem on sums of two squares), Fermat's Last Theorem resisted proof, leading to doubt that Fermat ever had a correct proof. Consequently the proposition became known as a conjecture rather than a theorem. After 358 years of effort by mathematicians, the first successful proof was released in 1994 by Andrew Wiles and form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bletchley Park
Bletchley Park is an English country house and estate in Bletchley, Milton Keynes ( Buckinghamshire) that became the principal centre of Allied code-breaking during the Second World War. The mansion was constructed during the years following 1883 for the financier and politician Sir Herbert Leon in the Victorian Gothic, Tudor, and Dutch Baroque styles, on the site of older buildings of the same name. During World War II, the estate housed the Government Code and Cypher School (GC&CS), which regularly penetrated the secret communications of the Axis Powersmost importantly the German Enigma and Lorenz ciphers. The GC&CS team of codebreakers included Alan Turing, Gordon Welchman, Hugh Alexander, Bill Tutte, and Stuart Milner-Barry. The nature of the work at Bletchley remained secret until many years after the war. According to the official historian of British Intelligence, the "Ultra" intelligence produced at Bletchley shortened the war by two to four years, and without it th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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