|
Ma Jun (mechanical Engineer)
Ma Jun ( 220–265), courtesy name Deheng, was a Chinese mechanical engineer, inventor, and politician who lived in the state of Cao Wei during the Three Kingdoms period of China. His most notable invention was that of the south-pointing chariot, a directional compass vehicle which actually had no magnetic function, but was operated by use of differential gears (which applies equal amount of torque to driving wheels rotating at different speeds). It is because of this revolutionary device (and other achievements) that Ma Jun is known as one of the most brilliant mechanical engineers and inventors of his day (alongside Zhang Heng of the earlier Eastern Han dynasty). The device was re-invented by many after Ma Jun, including the astronomer and mathematician Zu Chongzhi (429–500). In the later medieval dynastic periods, Ma Jun's south-pointing chariot was combined in a single device with the distance-measuring odometer. Life According to his friend and contemporary poet and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ma (surname)
Ma () is a Chinese family name. The surname literally means "horse". As of 2006, it ranks as the 14th most common Chinese surname in Mainland China and the most common surname within the Islam in China, Chinese Muslim community, specifically the Hui people, Dongxiangs, Dongxiang people and Salar people. In 2019 it was the 13th most common surname in Mainland China. A 2013 study found it to be the 13th most common, shared by 17,200,000 people or 1.290% of the population, with the province with the most being Henan. It is the 52nd name on the ''Hundred Family Surnames'' poem.K. S. Tom. [1989] (1989). Echoes from Old China: Life, Legends and Lore of the Middle Kingdom. University of Hawaii Press. . The offspring of Zhao She adopted "Ma" (馬), the first word of the district Ma Fu, as their surname. Other romanizations include Mah, Beh and Mar. Hui people, Hui Muslims, Salar people, Salars, Bonan people, Bonan and Dongxiangs, Dongxiang people commonly adopted Ma as the translation for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fufeng Commandery
Fufeng ( zh, 扶風), also known as You Fufeng ( zh, 右扶風), was a historical region located in modern western Shaanxi. In early Han dynasty, the administrator of the capital Chang'an and its vicinities was known as ''You Neishi'' (右內史), and the region was also known by the same name. In 104 BC, the western half of ''You Neishi'' was split off and renamed ''You Fufeng'' ("correcting culture on the right"). In Western Han, the area administered 21 counties: Weicheng (渭城), Huaili (槐里), Hu (鄠), Zhouzhi (盩厔), Li (斄), Yuyi (郁夷), Meiyang (美陽), Mei (郿), Yong (雍), Qi (漆), Xunyi (栒邑), Yumi (隃麋), Chencang (陳倉), Duyang (杜陽), Qian (汧), Haozhi (好畤), Guo (虢), Anling (安陵), Maoling (茂陵), Pingling (平陵), and Wugong (武功). The population was 836,070 in 2 AD, in 216,377 households. In Eastern Han, the commandery administered 15 counties, including Huaili, Anling, Pingling, Maoling, Hu, Mei, Wugong, Chencang, Qian, Yumi, Y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Differential (mechanical Device)
A differential is a gear train with three drive shafts that has the property that the rotational speed of one shaft is the average of the speeds of the others, or a fixed multiple of that average. Functional description The following description of a differential applies to a traditional rear-wheel-drive car or truck with an open or limited slip differential combined with a reduction gearset using bevel gears (these are not strictly necessary; see spur-gear differential): Thus, for example, if the car is making a turn to the right, the main ring gear may make 10 full rotations. During that time, the left wheel will make more rotations because it has farther to travel, and the right wheel will make fewer rotations as it has less distance to travel. The sun gears (which drive the axle half-shafts) will rotate at different speeds relative to the ring gear (one faster, one slower) by, say, 2 full turns each (4 full turns relative to each other), resulting in the left wheel mak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yellow Emperor
The Yellow Emperor, also known as the Yellow Thearch or by his Chinese name Huangdi (), is a deity ('' shen'') in Chinese religion, one of the legendary Chinese sovereigns and culture heroes included among the mytho-historical Three Sovereigns and Five Emperors and cosmological Five Regions' Highest Deities (). Calculated by Jesuit missionaries on the basis of Chinese chronicles and later accepted by the twentieth-century promoters of a universal calendar starting with the Yellow Emperor, Huangdi's traditional reign dates are 2697–2597 or 2698–2598 BC. Huangdi's cult became prominent in the late Warring States and early Han dynasty, when he was portrayed as the originator of the centralized state, as a cosmic ruler, and as a patron of esoteric arts. A large number of texts – such as the ''Huangdi Neijing'', a medical classic, and the '' Huangdi Sijing'', a group of political treatises – were thus attributed to him. Having waned in influence during most of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qin Lang
Qin Lang ( 227–238), courtesy name Yuanming, was a military general of the state of Cao Wei during the Three Kingdoms period of China. Family background Qin Lang was born in the late Eastern Han dynasty and his ancestral home was in Xinxing Commandery (新興郡; around present-day Xinzhou, Shanxi). His father was Qin Yilu, a former subordinate of Lü Bu, a warlord who lived in the late Eastern Han dynasty. His mother was Qin Yilu's ex-wife, Lady Du (杜氏), who was taken by the warlord Cao Cao as a concubine after Lü Bu's defeat and death at the Battle of Xiapi in 198. At a young age, Qin Lang accompanied his mother and joined Cao Cao's household. Cao Cao adopted Qin Lang as a son and doted on him. Once, during a banquet, Cao Cao told his guests, "Would someone love his foster son (referring to Qin Lang) in the same way as I do?" During Cao Rui's reign When Qin Lang grew up, he travelled around China and did not take up any appointments in the civil service or in the milita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treadles
A treadle (from oe, tredan, "to tread") is a mechanism operated with a pedal for converting reciprocating motion into rotating motion. Along with cranks, treadmills, and treadwheels, treadles allow human and animal machine power in the absence of electricity. Before the widespread availability of electric power, treadles were widely used to power a range of machines. They may still be used as a matter of preference or in environments where electric power is not available. Operation and uses A treadle is operated by pressing down on its pedal with one or both feet, causing a rocking motion. This movement can then be stored as rotational motion via a crankshaft driving a flywheel. Alternatively, energy can be stored in a spring as in the pole lathe. Treadles were once used extensively to power most machines including lathes, rotating or reciprocating saws, spinning wheels, looms, and sewing machines. The last use was popularized by Elias Howe and Isaac Singer in the e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drawloom
A loom is a device used to weave cloth and tapestry. The basic purpose of any loom is to hold the warp threads under tension to facilitate the interweaving of the weft threads. The precise shape of the loom and its mechanics may vary, but the basic function is the same. Etymology and usage The word "loom" derives from the Old English ''geloma'', formed from ''ge-'' (perfective prefix) and ''loma'', a root of unknown origin; the whole word ''geloma'' meant a utensil, tool, or machine of any kind. In 1404 "lome" was used to mean a machine to enable weaving thread into cloth. By 1838 "loom" had gained the additional meaning of a machine for interlacing thread. Weaving Weaving is done by intersecting the longitudinal threads, the warp, i.e. "that which is thrown across", with the transverse threads, the weft, i.e. "that which is woven". The major components of the loom are the warp beam, heddles, harnesses or shafts (as few as two, four is common, sixteen not unheard of), s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silk
Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm ''Bombyx mori'' reared in captivity (sericulture). The shimmering appearance of silk is due to the triangular prism-like structure of the silk fibre, which allows silk cloth to refract incoming light at different angles, thus producing different colors. Silk is produced by several insects; but, generally, only the silk of moth caterpillars has been used for textile manufacturing. There has been some research into other types of silk, which differ at the molecular level. Silk is mainly produced by the larvae of insects undergoing complete metamorphosis, but some insects, such as webspinners and raspy crickets, produce silk throughout their lives. Silk production also occurs in hymenoptera ( bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Chinese-children Instruction Vehicle Of Expo 2005 Aichi Japan
''The'' () is a grammatical article in English, denoting persons or things that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The'' is the most frequently used word in the English language; studies and analyses of texts have found it to account for seven percent of all printed English-language words. It is derived from gendered articles in Old English which combined in Middle English and now has a single form used with nouns of any gender. The word can be used with both singular and plural nouns, and with a noun that starts with any letter. This is different from many other languages, which have different forms of the definite article for different genders or numbers. Pronunciation In most dialects, "the" is pronounced as (with the voiced dental fricative followed by a schwa) when followed by a consonant sound, and as (homophone of the archaic pron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmission Diagram
Transmission may refer to: Medicine, science and technology * Power transmission ** Electric power transmission ** Propulsion transmission, technology allowing controlled application of power *** Automatic transmission *** Manual transmission *** Electric transmission (propulsion) * Signal transmission, the process of sending and propagating an analogue or digital information signal ** Analogue transmission - the process of sending and propagating an analogue signal ** Data communication, Data transmission, the process of sending and propagating digital information ** Signaling (telecommunications) - transmission of meta-information related to the actual transmission * Monetary transmission mechanism, process by which asset prices and general economic conditions are affected as a result of monetary policy decisions * Pathogen transmission, the passing of a disease from an infected host individual or group to a particular individual or group * Cellular signaling - transmission of si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Introverted
The traits of extraversion (also spelled extroversion Retrieved 2018-02-21.) and introversion are a central dimension in some human personality theories. The terms ''introversion'' and ''extraversion'' were introduced into psychology by Carl Jung,Jung, C. G. (1921) ''Psychologische Typen'', Rascher Verlag, Zurich – translation H.G. Baynes, 1923. although both the popular understanding and current psychological usage vary. Extraversion tends to be manifested in outgoing, talkative, energetic behavior, whereas introversion is manifested in more reflective and reserved behavior. Jung defined introversion as an "attitude-type characterised by orientation in life through subjective psychic contents", and extraversion as "an attitude-type characterised by concentration of interest on the external object". Extraversion and introversion are typically viewed as a single continuum, so to be higher in one necessitates being lower in the other. Jung provides a different perspective ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orator
An orator, or oratist, is a public speaker, especially one who is eloquent or skilled. Etymology Recorded in English c. 1374, with a meaning of "one who pleads or argues for a cause", from Anglo-French ''oratour'', Old French ''orateur'' (14th century), Latin ''orator'' ("speaker"), from ''orare'' ("speak before a court or assembly; plead"), derived from a Proto-Indo-European base *''or-'' ("to pronounce a ritual formula"). The modern meaning of the word, "public speaker", is attested from c. 1430. History In ancient Rome, the art of speaking in public (''Ars Oratoria'') was a professional competence especially cultivated by politicians and lawyers. As the Greeks were still seen as the masters in this field, as in philosophy and most sciences, the leading Roman families often either sent their sons to study these things under a famous master in Greece (as was the case with the young Julius Caesar), or engaged a Greek teacher (under pay or as a slave). In the young revolutionar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.png "Click for more on -> The Chinese-children Instruction Vehicle Of Expo 2005 Aichi Japan")
