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Georg Wilhelm Munke
Georg Wilhelm Muncke or Georg Wilhelm Munke (28 November 1772, in Hilligsfeld – 17 October 1847, in Großkmehlen) was a German physicist. From 1797 to 1810 he worked as an administrator at the Georgianum in Hanover. In 1810 he became a professor at the University of Marburg, where he gave lectures in mathematics and experimental physics. From 1817 up until his death in 1847 he was a professor of physics at the University of Heidelberg. In 1826 he became an honorary member of the Russian Academy of Sciences. Published works * ''System der atomistischen Physik. Nach den neuesten Erfahrungen und Versuchen dargestellt'' (1809) – System of atomic physics. * ''Handbuch der Naturlehre'', (2 volumes, 1829) – Manual of natural science. * ''Die ersten Elemente der gesammten Naturlehre zum Gebrauche für höhere Schulen und Gymnasien'', 1842 – The first elements of the doctrine of nature. * ''Populäre Wärmelehre; oder, Darstellung des Wesens und Verhaltens der ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hilligsfeld
Hamelin ( ; german: Hameln ) is a town on the river Weser in Lower Saxony, Germany. It is the capital of the district of Hamelin-Pyrmont and has a population of roughly 57,000. Hamelin is best known for the tale of the Pied Piper of Hamelin. History Hamelin started with a monastery, which was founded as early as 851 AD. A village grew in the neighbourhood and had become a town by the 12th century. The incident with the "Pied Piper" (see below) is said to have happened in 1284 and may be based on a true event, although somewhat different from the tale. In the 15th and 16th centuries Hamelin was a minor member of the Hanseatic League. In June 1634, during the Thirty Years' War, Lothar Dietrich, Freiherr of Bönninghausen, a General with the Imperial Army, lost the Battle of Oldendorf to the Swedish General Kniphausen, after Hamelin had been besieged by the Swedish army. The era of the town's greatest prosperity began in 1664, when Hamelin became a fortified border town of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electromagnetism
In physics, electromagnetism is an interaction that occurs between particles with electric charge. It is the second-strongest of the four fundamental interactions, after the strong force, and it is the dominant force in the interactions of atoms and molecules. Electromagnetism can be thought of as a combination of electricity and magnetism, two distinct but closely intertwined phenomena. In essence, electric forces occur between any two charged particles, causing an attraction between particles with opposite charges and repulsion between particles with the same charge, while magnetism is an interaction that occurs exclusively between ''moving'' charged particles. These two effects combine to create electromagnetic fields in the vicinity of charge particles, which can exert influence on other particles via the Lorentz force. At high energy, the weak force and electromagnetic force are unified as a single electroweak force. The electromagnetic force is responsible for many o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heidelberg University Faculty
Heidelberg (; Palatine German language, Palatine German: ''Heidlberg'') is a city in the States of Germany, German state of Baden-Württemberg, situated on the river Neckar in south-west Germany. As of the 2016 census, its population was 159,914, of which roughly a quarter consisted of students. Located about south of Frankfurt, Heidelberg is the List of cities in Baden-Württemberg by population, fifth-largest city in Baden-Württemberg. Heidelberg is part of the densely populated Rhine-Neckar, Rhine-Neckar Metropolitan Region. Heidelberg University, founded in 1386, is Germany's oldest and one of Europe's most reputable universities. Heidelberg is a Science, scientific hub in Germany and home to several internationally renowned #Research, research facilities adjacent to its university, including the European Molecular Biology Laboratory and four Max Planck Society, Max Planck Institutes. The city has also been a hub for the arts, especially literature, throughout the centurie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Hamelin
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity Personal identity is the unique numerical identity of a person over time. Discussions regarding personal identity typically aim to determine the necessary and sufficient conditions under which a person at one time and a person at another time can ... and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1847 Deaths
Events January–March * January 4 – Samuel Colt sells his first revolver pistol to the U.S. government. * January 13 – The Treaty of Cahuenga ends fighting in the Mexican–American War in California. * January 16 – John C. Frémont is appointed Governor of the new California Territory. * January 17 – St. Anthony Hall fraternity is founded at Columbia University, New York City. * January 30 – Yerba Buena, California, is renamed San Francisco. * February 5 – A rescue effort, called the First Relief, leaves Johnson's Ranch to save the ill-fated Donner Party (California-bound emigrants who became snowbound in the Sierra Nevada earlier this winter; some have resorted to survival by cannibalism). * February 22 – Mexican–American War: Battle of Buena Vista – 5,000 American troops under General Zachary Taylor use their superiority in artillery to drive off 15,000 Mexican troops under Antonio López de Santa Anna, defeating the Mexicans the next day. * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1772 Births
Year 177 ( CLXXVII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Commodus and Plautius (or, less frequently, year 930 ''Ab urbe condita''). The denomination 177 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Lucius Aurelius Commodus Caesar (age 15) and Marcus Peducaeus Plautius Quintillus become Roman Consuls. * Commodus is given the title ''Augustus'', and is made co-emperor, with the same status as his father, Marcus Aurelius. * A systematic persecution of Christians begins in Rome; the followers take refuge in the catacombs. * The churches in southern Gaul are destroyed after a crowd accuses the local Christians of practicing cannibalism. * Forty-seven Christians are martyred in Lyon (Saint Blandina and Pothinus, bishop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Needle Telegraph
A needle telegraph is an electrical telegraph that uses indicating needles moved electromagnetically as its means of displaying messages. It is one of the two main types of electromagnetic telegraph, the other being the armature system, as exemplified by the telegraph of Samuel Morse in the United States. Needle telegraphs were widely used in Europe and the British Empire during the nineteenth century. Needle telegraphs were suggested shortly after Hans Christian Ørsted discovered that electric currents could deflect compass needles in 1820. Pavel Schilling developed a telegraph using needles suspended by threads. This was intended for installation in Russia for government use, but Schilling died in 1837 before it could be implemented. Carl Friedrich Gauss and Wilhelm Eduard Weber built a telegraph that was used for scientific study and communication between university sites. Carl August von Steinheil adapted Gauss and Weber's rather cumbersome apparatus for use on various ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Samuel Traugott Gehler
Johann Samuel Traugott Gehler (1 November 1751, in Görlitz – 16 October 1795, in Leipzig) was a German lawyer and physicist. He studied mathematics, natural sciences and law at the University of Leipzig, obtaining his habilitation for mathematics in 1776 and his law degree the following year. While a student, his influences included physicist Johann Heinrich Winckler. In 1783 he became a city councilman in Leipzig, and from 1786 served as an associate at the Oberhofgericht Leipzig. He is best remembered as the author of a popular dictionary of physical sciences, ''Physikalisches Wörterbuch'', published from 1787 in six volumes. Decades later, the dictionary was edited and re-issued in 11 volumes (1825–45); its editors being Heinrich Wilhelm Brandes, Leopold Gmelin, Johann Caspar Horner, Carl Ludwig Littrow, Christian Heinrich Pfaff and Georg Wilhelm Muncke. In 1783 he published a German translation of Tiberius Cavallo Tiberius Cavallo (also Tiberio) (30 March 1749, N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francis Ronalds
Sir Francis Ronalds FRS (21 February 17888 August 1873) was an English scientist and inventor, and arguably the first electrical engineer. He was knighted for creating the first working electric telegraph over a substantial distance. In 1816 he laid an eight-mile length of iron wire between wooden frames in his mother's garden and sent pulses using electrostatic generators. Upbringing and family Born to Francis Ronalds and Jane (née Field), wholesale cheesemongers, at their business premises in Upper Thames Street, London, he attended Unitarian minister Eliezer Cogan's school before being apprenticed to his father at the age of 14 through the Drapers' Company. He ran the large business for some years. The family later resided in Canonbury Place and Highbury Terrace, both in Islington, at Kelmscott House in Hammersmith, Queen Square in Bloomsbury, at Croydon, and on Chiswick Lane. Several of Ronalds' eleven brothers and sisters also led noteworthy lives. His younges ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Telegraph
Electrical telegraphs were point-to-point text messaging systems, primarily used from the 1840s until the late 20th century. It was the first electrical telecommunications system and the most widely used of a number of early messaging systems called ''telegraphs'', that were devised to communicate text messages quicker than physical transportation. Electrical telegraphy can be considered to be the first example of electrical engineering. Text telegraphy consisted of two or more geographically separated stations, called telegraph offices. The offices were connected by wires, usually supported overhead on utility poles. Many different electrical telegraph systems were invented, but the ones that became widespread fit into two broad categories. The first category consists of needle telegraphs in which a needle pointer is made to move electromagnetically with an electric current sent down the telegraph line. Early systems used multiple needles requiring multiple wires. The first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermoelectrics
Thermoelectric materials show the thermoelectric effect in a strong or convenient form. The ''thermoelectric effect'' refers to phenomena by which either a temperature difference creates an electric potential or an electric current creates a temperature difference. These phenomena are known more specifically as the Seebeck effect (creating a voltage from temperature difference), Peltier effect (driving heat flow with an electric current), and Thomson effect (reversible heating or cooling within a conductor when there is both an electric current and a temperature gradient). While all materials have a nonzero thermoelectric effect, in most materials it is too small to be useful. However, low-cost materials that have a sufficiently strong thermoelectric effect (and other required properties) are also considered for applications including power generation and refrigeration. The most commonly used thermoelectric material is based on bismuth telluride (). Thermoelectric materials are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetism
Magnetism is the class of physical attributes that are mediated by a magnetic field, which refers to the capacity to induce attractive and repulsive phenomena in other entities. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. Magnetism is one aspect of the combined phenomena of electromagnetism. The most familiar effects occur in ferromagnetic materials, which are strongly attracted by magnetic fields and can be magnetized to become permanent magnets, producing magnetic fields themselves. Demagnetizing a magnet is also possible. Only a few substances are ferromagnetic; the most common ones are iron, cobalt, and nickel and their alloys. The rare-earth metals neodymium and samarium are less common examples. The prefix ' refers to iron because permanent magnetism was first observed in lodestone, a form of natural iron ore called magnetite, Fe3O4. All substances exhibit some type of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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