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Structural Engineering
Structural engineering is a sub-discipline of civil engineering in which structural engineers are trained to design the 'bones and muscles' that create the form and shape of man-made structures. Structural engineers also must understand and calculate the stability, strength, rigidity and earthquake-susceptibility of built structures for buildings and nonbuilding structures. The structural designs are integrated with those of other designers such as architects and building services engineer and often supervise the construction of projects by contractors on site. They can also be involved in the design of machinery, medical equipment, and vehicles where structural integrity affects functioning and safety. See glossary of structural engineering. Structural engineering theory is based upon applied physical laws and empirical knowledge of the structural performance of different materials and geometries. Structural engineering design uses a number of relatively simple structu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Tour Eiffel Wikimedia Commons
Tour or Tours may refer to: Travel * Tourism, travel for pleasure * Tour of duty, a period of time spent in military service * Campus tour, a journey through a college or university's campus * Guided tour, a journey through a location, directed by a guide * Walking tour, a visit of a historical or cultural site undertaken on foot Entertainment * Concert tour, a series of concerts by an artist or group of artists in different locations * Touring theatre, independent theatre that travels to different venues Sports * Professional golf tours, otherwise unconnected professional golf tournaments * Tennis tour, tennis played in tournament format at a series of venues * Events in various sports named the Pro Tour (other) * Tour de France ('), the world's biggest bicycle race Places * Tour-de-Faure, Lot, France * Tour-en-Bessin, Calvados, France * Tour-en-Sologne, Loir-et-Cher, France * Tours, Indre-et-Loire, France * Tours-en-Savoie, Savoie, France * Tours-en-Vim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Imhotep
Imhotep (; egy, ỉỉ-m-ḥtp "(the one who) comes in peace"; fl. late 27th century BCE) was an Egyptian chancellor to the Pharaoh Djoser, possible architect of Djoser's step pyramid, and high priest of the sun god Ra at Heliopolis. Very little is known of Imhotep as a historical figure, but in the 3,000 years following his death, he was gradually glorified and deified. Traditions from long after Imhotep's death treated him as a great author of wisdom texts and especially as a physician. No text from his lifetime mentions these capacities and no text mentions his name in the first 1,200 years following his death. Apart from the three short contemporary inscriptions that establish him as chancellor to the Pharaoh, the first text to reference Imhotep dates to the time of Amenhotep III (). It is addressed to the owner of a tomb, and reads: It appears that this libation to Imhotep was done regularly, as they are attested on papyri associated with sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Newton's Laws Of Motion
Newton's laws of motion are three basic laws of classical mechanics that describe the relationship between the motion of an object and the forces acting on it. These laws can be paraphrased as follows: # A body remains at rest, or in motion at a constant speed in a straight line, unless acted upon by a force. # When a body is acted upon by a force, the time rate of change of its momentum equals the force. # If two bodies exert forces on each other, these forces have the same magnitude but opposite directions. The three laws of motion were first stated by Isaac Newton in his ''Philosophiæ Naturalis Principia Mathematica'' (''Mathematical Principles of Natural Philosophy''), originally published in 1687. Newton used them to investigate and explain the motion of many physical objects and systems, which laid the foundation for classical mechanics. In the time since Newton, the conceptual content of classical physics has been reformulated in alternative ways, involving differ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Philosophiæ Naturalis Principia Mathematica
( English: ''Mathematical Principles of Natural Philosophy'') often referred to as simply the (), is a book by Isaac Newton that expounds Newton's laws of motion and his law of universal gravitation. The ''Principia'' is written in Latin and comprises three volumes, and was first published on 5 July 1687. The is considered one of the most important works in the history of science. The French mathematical physicist Alexis Clairaut assessed it in 1747: "The famous book of ''Mathematical Principles of Natural Philosophy'' marked the epoch of a great revolution in physics. The method followed by its illustrious author Sir Newton ... spread the light of mathematics on a science which up to then had remained in the darkness of conjectures and hypotheses." A more recent assessment has been that while acceptance of Newton's laws was not immediate, by the end of the century after publication in 1687, "no one could deny that" (out of the ) "a science had emerged that, at least in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Isaac Newton
Sir Isaac Newton (25 December 1642 – 20 March 1726/27) was an English mathematician, physicist, astronomer, alchemist, theologian, and author (described in his time as a " natural philosopher"), widely recognised as one of the greatest mathematicians and physicists and among the most influential scientists of all time. He was a key figure in the philosophical revolution known as the Enlightenment. His book (''Mathematical Principles of Natural Philosophy''), first published in 1687, established classical mechanics. Newton also made seminal contributions to optics, and shares credit with German mathematician Gottfried Wilhelm Leibniz for developing infinitesimal calculus. In the , Newton formulated the laws of motion and universal gravitation that formed the dominant scientific viewpoint for centuries until it was superseded by the theory of relativity. Newton used his mathematical description of gravity to derive Kepler's laws of planetary motion, accoun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Robert Hooke
Robert Hooke FRS (; 18 July 16353 March 1703) was an English polymath active as a scientist, natural philosopher and architect, who is credited to be one of two scientists to discover microorganisms in 1665 using a compound microscope that he built himself, the other scientist being Antoni van Leeuwenhoek in 1676. An impoverished scientific inquirer in young adulthood, he found wealth and esteem by performing over half of the architectural surveys after London's great fire of 1666. Hooke was also a member of the Royal Society and since 1662 was its curator of experiments. Hooke was also Professor of Geometry at Gresham College. As an assistant to physical scientist Robert Boyle, Hooke built the vacuum pumps used in Boyle's experiments on gas law, and himself conducted experiments. In 1673, Hooke built the earliest Gregorian telescope, and then he observed the rotations of the planets Mars and Jupiter. Hooke's 1665 book '' Micrographia'', in which he coined the term " cell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Hooke's Law
In physics, Hooke's law is an empirical law which states that the force () needed to extend or compress a spring by some distance () scales linearly with respect to that distance—that is, where is a constant factor characteristic of the spring (i.e., its stiffness), and is small compared to the total possible deformation of the spring. The law is named after 17th-century British physicist Robert Hooke. He first stated the law in 1676 as a Latin anagram. He published the solution of his anagram in 1678 as: ("as the extension, so the force" or "the extension is proportional to the force"). Hooke states in the 1678 work that he was aware of the law since 1660. Hooke's equation holds (to some extent) in many other situations where an elastic body is deformed, such as wind blowing on a tall building, and a musician plucking a string of a guitar. An elastic body or material for which this equation can be assumed is said to be linear-elastic or Hookean. Hooke's law i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Two New Sciences
The ''Discourses and Mathematical Demonstrations Relating to Two New Sciences'' ( it, Discorsi e dimostrazioni matematiche intorno a due nuove scienze ) published in 1638 was Galileo Galilei's final book and a scientific testament covering much of his work in physics over the preceding thirty years. It was written partly in Italian and partly in Latin. After his ''Dialogue Concerning the Two Chief World Systems'', the Roman Inquisition had banned the publication of any of Galileo's works, including any he might write in the future. After the failure of his initial attempts to publish ''Two New Sciences'' in France, Germany, and Poland, it was published by Lodewijk Elzevir who was working in Leiden, South Holland, where the writ of the Inquisition was of less consequence (see House of Elzevir). Fra Fulgenzio Micanzio, the official theologian of the Republic of Venice, had initially offered to help Galileo publish in Venice the new work, but he pointed out that publishing the ''T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Galileo Galilei
Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642) was an Italian astronomer, physicist and engineer, sometimes described as a polymath. Commonly referred to as Galileo, his name was pronounced (, ). He was born in the city of Pisa, then part of the Duchy of Florence. Galileo has been called the "father" of observational astronomy, modern physics, the scientific method, and modern science. Galileo studied speed and velocity, gravity and free fall, the principle of relativity, inertia, projectile motion and also worked in applied science and technology, describing the properties of pendulums and " hydrostatic balances". He invented the thermoscope and various military compasses, and used the telescope for scientific observations of celestial objects. His contributions to observational astronomy include telescopic confirmation of the phases of Venus, observation of the four largest satellites of Jupiter, observation of Satur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Leonardo Da Vinci
Leonardo di ser Piero da Vinci (15 April 14522 May 1519) was an Italian polymath of the High Renaissance who was active as a painter, Drawing, draughtsman, engineer, scientist, theorist, sculptor, and architect. While his fame initially rested on his achievements as a painter, he also became known for #Journals and notes, his notebooks, in which he made drawings and notes on a variety of subjects, including anatomy, astronomy, botany, cartography, painting, and paleontology. Leonardo is widely regarded to have been a genius who epitomized the Renaissance humanism, Renaissance humanist ideal, and his List of works by Leonardo da Vinci, collective works comprise a contribution to later generations of artists matched only by that of his younger contemporary, Michelangelo. Born Legitimacy (family law), out of wedlock to a successful Civil law notary, notary and a lower-class woman in, or near, Vinci, Tuscany, Vinci, he was educated in Florence by the Italian painter and sculpto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Leonhard Euler 2 (1921-2014), German author & historian
{{disambiguation ...
Leonhard may refer to: *Leonhard Euler (1707–1783), Swiss mathematician and physicist *Leonhard Hutter (1563–1616), German theologian *Karl Leonhard (1904–1988), German psychiatrist *Jim Leonhard (1982– ), American football safety *LEONHARD (2009– ), Oslo-based DJ collective *Leonhard Rauwolf (1535–1596), German physician and botanist *Leonhard Stejneger (1851–1943), American herpetologist *Wolfgang Leonhard Wolfgang Leonhard (16 April 1921 – 17 August 2014) was a German political author and historian of the Soviet Union, the German Democratic Republic and Communism. A German Communist whose family had fled Hitler's Germany and who was educat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Sir Isaac Newton By Sir Godfrey Kneller, Bt
''Sir'' is a formal honorific address in English for men, derived from Sire in the High Middle Ages. Both are derived from the old French "Sieur" (Lord), brought to England by the French-speaking Normans, and which now exist in French only as part of "Monsieur", with the equivalent "My Lord" in English. Traditionally, as governed by law and custom, Sir is used for men titled as knights, often as members of orders of chivalry, as well as later applied to baronets and other offices. As the female equivalent for knighthood is damehood, the female equivalent term is typically Dame. The wife of a knight or baronet tends to be addressed as Lady, although a few exceptions and interchanges of these uses exist. Additionally, since the late modern period, Sir has been used as a respectful way to address a man of superior social status or military rank. Equivalent terms of address for women are Madam (shortened to Ma'am), in addition to social honorifics such as Mrs, Ms or Miss. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |