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1877 In Science
The year 1877 in science and technology involved some significant events, listed below. Events * June 19 – Eadweard Muybridge successfully produces a fast-motion sequence of photographs showing a horse in movement, ''Sallie Gardner at a Gallop'', using multiple cameras at Palo Alto, California, demonstrating that a running horse has all four legs lifted off the ground at once. The sequence could be run on a Zoopraxiscope. Astronomy * August 12 – American astronomer Asaph Hall discovers Deimos, the smaller of the two moons of Mars. On August 18, he discovers the larger, Phobos. Cartography * Peirce quincuncial projection devised by Charles Sanders Peirce. Chemistry * Ludwig Boltzmann establishes statistical derivations of many important physical and chemical concepts, including entropy, and distributions of molecular velocities in the gas phase. Earth sciences * June 26 – Volcanic eruption of Cotopaxi in Ecuador. History of science * Dr. August Eisenlohr publishes t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cotopaxi
Cotopaxi () is an active stratovolcano in the Andes Mountains, located near Latacunga city of Cotopaxi Province, about south of Quito, and northeast of the city of Latacunga, Ecuador. It is the second highest summit in Ecuador (after Chimborazo), reaching a height of . Cotopaxi is among the highest active volcanoes in the world. Cotopaxi is known to have erupted 87 times, resulting in the creation of numerous valleys formed by lahars (mudflows) around the volcano. An ongoing eruption began on 21 October 2022. At the end of February 2023, the Geophysical Institute of Ecuador reported that Cotopaxi had produced around 8,000 earthquakes since October 21, 2022, amounting to 1,600 events per month. Description On a clear day, Cotopaxi is clearly visible on the skyline from Latacunga and Quito. It is part of the chain of volcanoes around the Pacific Plate known as the Pacific Ring of Fire. It has an almost symmetrical cone that rises from a highland plain of about , with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continuum Hypothesis
In mathematics, specifically set theory, the continuum hypothesis (abbreviated CH) is a hypothesis about the possible sizes of infinite sets. It states: Or equivalently: In Zermelo–Fraenkel set theory with the axiom of choice (ZFC), this is equivalent to the following equation in aleph numbers: 2^=\aleph_1, or even shorter with beth numbers: \beth_1 = \aleph_1. The continuum hypothesis was advanced by Georg Cantor in 1878, and establishing its truth or falsehood is the first of Hilbert's 23 problems presented in 1900. The answer to this problem is independent of ZFC, so that either the continuum hypothesis or its negation can be added as an axiom to ZFC set theory, with the resulting theory being consistent if and only if ZFC is consistent. This independence was proved in 1963 by Paul Cohen, complementing earlier work by Kurt Gödel in 1940. The name of the hypothesis comes from the term '' continuum'' for the real numbers. History Cantor believed the continuum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Cantor
Georg Ferdinand Ludwig Philipp Cantor ( ; ; – 6 January 1918) was a mathematician who played a pivotal role in the creation of set theory, which has become a foundations of mathematics, fundamental theory in mathematics. Cantor established the importance of one-to-one correspondence between the members of two sets, defined infinite set, infinite and well-order, well-ordered sets, and proved that the real numbers are more numerous than the natural numbers. Cantor's method of proof of this theorem implies the existence of an infinity of infinities. He defined the cardinal number, cardinal and ordinal number, ordinal numbers and their arithmetic. Cantor's work is of great philosophical interest, a fact he was well aware of. Originally, Cantor's theory of transfinite numbers was regarded as counter-intuitive – even shocking. This caused it to encounter resistance from mathematical contemporaries such as Leopold Kronecker and Henri Poincaré and later from Hermann Wey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Technological Change
Technological change (TC) or technological development is the overall process of invention, innovation and diffusion of innovations, diffusion of technology or business process, processes.From ''The New Palgrave Dictionary otechnical change by S. Metcalfe. •biased and biased technological change by Peter L. Rousseau. •skill-biased technical change by Giovanni L. Violante. In essence, technological change covers the invention of technologies (including processes) and their commercialization or release as open source via research and development (producing emerging technologies), the continual improvement process, continual improvement of technologies (in which they often become less expensive), and the diffusion of technologies throughout industry or society (which sometimes involves disruptive innovation, disruption and technological convergence, convergence). In short, technological change is based on both better and more technology. Modeling technological chan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Social Progress
Progress is movement towards a perceived refined, improved, or otherwise desired state. It is central to the philosophy of progressivism, which interprets progress as the set of advancements in technology, science, and social organization efficiency – the latter being generally achieved through direct societal action, as in social enterprise or through activism, but being also attainable through natural sociocultural evolution – that progressivism holds all human societies should strive towards. The concept of progress was introduced in the early-19th-century social theories, especially social evolution as described by Auguste Comte and Herbert Spencer. It was present in the Enlightenment's philosophies of history. As a goal, social progress has been advocated by varying realms of political ideologies with different theories on how it is to be achieved. Measuring progress Specific indicators for measuring progress can range from economic data, technical innovations, chan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancient Society
''Ancient Society'' is an 1877 book by the American anthropologist Lewis H. Morgan. Building on the data about kinship and social organization presented in his 1871 '' Systems of Consanguinity and Affinity of the Human Family'', Morgan develops his theory of the three stages of human progress, i.e., from Savagery through Barbarism to Civilization. Contemporary European social theorists such as Karl Marx and Friedrich Engels were influenced by Morgan's work on social structure and material culture, as shown by Engels' '' The Origin of the Family, Private Property, and the State'' (1884). The concept of progress The dominant idea of Morgan's thought is that of ''progress''. He conceived it as a ''career'' of social ''states'' arranged in a ''scale'' on which man has ''worked his way up'' from the ''bottom''. Progress is ''historically true of the entire human family'', but not uniformly. Different ''branches'' of the family have evidenced ''human advancement'' to different condi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lewis H
Lewis may refer to: Names * Lewis (given name), including a list of people with the given name * Lewis (surname), including a list of people with the surname Music * Lewis (musician), Canadian singer * " Lewis (Mistreated)", a song by Radiohead from ''My Iron Lung'' Places * Lewis (crater), a crater on the far side of the Moon * Isle of Lewis, the northern part of Lewis and Harris, Western Isles, Scotland United States * Lewis, Colorado * Lewis, Indiana * Lewis, Iowa * Lewis, Kansas * Lewis Wharf, Boston, Massachusetts * Lewis, Missouri * Lewis, Essex County, New York * Lewis, Lewis County, New York * Lewis, North Carolina * Lewis, Vermont * Lewis, Wisconsin Ships * USS ''Lewis'' (1861), a sailing ship * USS ''Lewis'' (DE-535), a destroyer escort in commission from 1944 to 1946 Science * Lewis structure, a diagram of a molecule that shows the bonding between the atoms * Lewis acids and bases * Lewis antigen system, a human blood group system * Lewis number, a dim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethnologist
Ethnology (from the , meaning 'nation') is an academic field and discipline that compares and analyzes the characteristics of different peoples and the relationships between them (compare cultural, social, or sociocultural anthropology). Scientific discipline Compared to ethnography, the study of single groups through direct contact with the culture, ethnology takes the research that ethnographers have compiled and then compares and contrasts different cultures. The term ''ethnologia'' (''ethnology'') is credited to Adam Franz Kollár (1718–1783) who used and defined it in his ''Historiae ivrisqve pvblici Regni Vngariae amoenitates'' published in Vienna in 1783. as: "the science of nations and peoples, or, that study of learned men in which they inquire into the origins, languages, customs, and institutions of various nations, and finally into the fatherland and ancient seats, in order to be able better to judge the nations and peoples in their own times." Kollár's inter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lawyer
A lawyer is a person who is qualified to offer advice about the law, draft legal documents, or represent individuals in legal matters. The exact nature of a lawyer's work varies depending on the legal jurisdiction and the legal system, as well as the lawyer's area of practice. In many jurisdictions, the legal profession is divided into various branches — including barristers, solicitors, conveyancers, notaries, canon lawyer — who perform different tasks related to the law. Historically, the role of lawyers can be traced back to ancient civilizations such as Greece and Rome. In modern times, the practice of law includes activities such as representing clients in criminal or civil court, advising on business transactions, protecting intellectual property, and ensuring compliance with laws and regulations. Depending on the country, the education required to become a lawyer can range from completing an undergraduate law degree to undergoing postgraduate education and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railroad
Rail transport (also known as train transport) is a means of transport using wheeled vehicles running in railway track, tracks, which usually consist of two parallel steel railway track, rails. Rail transport is one of the two primary means of land transport, next to road transport. It is used for about 8% of passenger and rail freight transport, freight transport globally, thanks to its Energy efficiency in transport, energy efficiency and potentially high-speed rail, high speed.Rolling stock on rails generally encounters lower friction, frictional resistance than rubber-tyred road vehicles, allowing rail cars to be coupled into longer trains. Power is usually provided by Diesel locomotive, diesel or Electric locomotive, electric locomotives. While railway transport is capital intensity, capital-intensive and less flexible than road transport, it can carry heavy loads of passengers and cargo with greater energy efficiency and safety. Precursors of railways driven by human or an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States asserts sovereignty over five Territories of the United States, major island territories and United States Minor Outlying Islands, various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's List of countries and dependencies by area, third-largest land area and List of countries and dependencies by population, third-largest population, exceeding 340 million. Its three Metropolitan statistical areas by population, largest metropolitan areas are New York metropolitan area, New York, Greater Los Angeles, Los Angel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
