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Margaret Eliza Maltby
Margaret Eliza Maltby (December 10, 1860 – May 3, 1944) was an American physicist notable for her measurement of high Electrolyte, electrolytic Electrical resistance and conductance, resistances and the Conductivity (electrolytic), conductivity of very dilute Solution (chemistry), solutions. Maltby was the first woman to earn a Bachelor of Science degree from the Massachusetts Institute of Technology, and the first woman to earn a Doctor of Philosophy, Ph.D. in physics from any German university. She taught for over 30 years at Barnard College where she introduced one of the first courses on the Musical acoustics, physics of music. Maltby was active in the American Association of University Women where she was instrumental in helping female academics receive fellowships to study and conduct research, at a time when it was uncommon for women to be eligible for such fellowships. Maltby had a child out of Marriage, wedlock. Unusually for her time, she was able to continue her care ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bristolville, Ohio
Bristolville is an unincorporated community in central Bristol Township, Trumbull County, Ohio, United States. It lies at the intersection of State Routes 45 and 88 and has a post office with the ZIP code 44402. It is part of the Youngstown–Warren metropolitan area. The train station was nearby at Bristolville Station and was served by the Spokane Post Office. History Bristolville was founded in 1807, and named after Bristol, Connecticut, the native home of a first settler. Northern Ohio had settlers mostly from the Northeast, many of whom supported abolition of slavery before the Civil War. One of the notable natives of Bristolville is John Henrie Kagi, who fought with John Brown in Bleeding Kansas before its admission to the Union. He was second in command during Brown's Harper's Ferry raid on the federal arsenal, where he was killed by state militia at the age of 24. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Resistivity And Conductivity
Electrical resistivity (also called volume resistivity or specific electrical resistance) is a fundamental specific property of a material that measures its electrical resistance or how strongly it resists electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek alphabet, Greek letter (Rho (letter), rho). The SI unit of electrical resistivity is the ohm-metre (Ω⋅m). For example, if a solid cube of material has sheet contacts on two opposite faces, and the Electrical resistance, resistance between these contacts is , then the resistivity of the material is . Electrical conductivity (or specific conductance) is the reciprocal of electrical resistivity. It represents a material's ability to conduct electric current. It is commonly signified by the Greek letter (Sigma (letter), sigma), but (kappa) (especially in electrical engineering) and (gamma) are sometimes used. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
College-preparatory School
A college-preparatory school (often shortened to prep school, preparatory school, college prep school or college prep academy) is a type of secondary school. The term refers to state school, public, Independent school, private independent or parochial school, parochial schools primarily designed to prepare students for higher education. Japan In Japan, college-prep schools are called ''Shingakukō'' , which means a school used to progress into another school. Prep schools in Japan are usually considered prestigious and are often difficult to get into. However, there are many tiers of prep schools, the entry into which depends on the university that the school leads into. Japanese prep schools started as , secondary schools for boys, which were founded after the secondary school law in 1886. Later, , secondary school for girls (1891), and , Vocational school, vocational schools (1924), were included among and were legally regarded as schools on the same level as a school f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oberlin, Ohio
Oberlin () is a city in Lorain County, Ohio, United States. It is located about southwest of Cleveland within the Cleveland metropolitan area. The population was 8,555 at the 2020 United States census, 2020 census. Oberlin is the home of Oberlin College, a liberal arts college and music College or university school of music, conservatory with approximately 3,000 students. The town is the birthplace of the Anti-Saloon League and the Hall-Héroult process, the process of reducing aluminum from its fluoride salts by electrolysis, which made industrial production of aluminum possible. History Oberlin was founded in 1833 by two Presbyterianism, Presbyterian ministers, John Jay Shipherd and Philo P. Stewart. The pair had become friends while spending the summer of 1832 together in nearby Elyria, Ohio, Elyria and discovered a shared dissatisfaction with what they saw as the lack of strong Christian morals among the settlers of the American West. Their proposed solution was to create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machine
A machine is a physical system that uses power to apply forces and control movement to perform an action. The term is commonly applied to artificial devices, such as those employing engines or motors, but also to natural biological macromolecules, such as molecular machines. Machines can be driven by animals and people, by natural forces such as wind and water, and by chemical, thermal, or electrical power, and include a system of mechanisms that shape the actuator input to achieve a specific application of output forces and movement. They can also include computers and sensors that monitor performance and plan movement, often called mechanical systems. Renaissance natural philosophers identified six simple machines which were the elementary devices that put a load into motion, and calculated the ratio of output force to input force, known today as mechanical advantage. Modern machines are complex systems that consist of structural elements, mechanisms and contr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Margaret Maltby (center) With Her Sisters Betsy (Maltby) Mayhew And Martha Jane Maltby, January 18, 1892
Margaret Eliza Maltby (December 10, 1860 – May 3, 1944) was an American physicist notable for her measurement of high electrolytic resistances and the conductivity of very dilute solutions. Maltby was the first woman to earn a Bachelor of Science degree from the Massachusetts Institute of Technology, and the first woman to earn a Ph.D. in physics from any German university. She taught for over 30 years at Barnard College where she introduced one of the first courses on the physics of music. Maltby was active in the American Association of University Women where she was instrumental in helping female academics receive fellowships to study and conduct research, at a time when it was uncommon for women to be eligible for such fellowships. Maltby had a child out of wedlock. Unusually for her time, she was able to continue her career in academia by keeping the birth a secret and later claiming the child publicly through adoption. Early life Margaret Maltby was born Minnie Eliza ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marriage
Marriage, also called matrimony or wedlock, is a culturally and often legally recognised union between people called spouses. It establishes rights and obligations between them, as well as between them and their children (if any), and between them and their Affinity (law), in-laws. It is nearly a cultural universal, but the definition of marriage varies between cultures and religions, and over time. Typically, it is an institution in which interpersonal relationships, usually sexual, are acknowledged or sanctioned. In some cultures, marriage is recommended or considered to be Premarital sex, compulsory before pursuing sexual activity. A marriage ceremony is called a wedding, while a private marriage is sometimes called an elopement. Around the world, there has been a general trend towards ensuring Women's rights, equal rights for women and ending discrimination and harassment against couples who are Interethnic marriage, interethnic, Interracial marriage, interracial, In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Association Of University Women
The American Association of University Women (AAUW), officially founded in 1881, is a non-profit organization that advances Justice, equity for women and girls through advocacy, education, and research. The organization has a nationwide Social network, network of 170,000 members and supporters, 1,000 local branches, and 800 college and university partners. Its headquarters are in Washington, D.C. AAUW's CEO is Gloria L. Blackwell. History 19th century In 1881, Emily Fairbanks Talbot, Marion Talbot and Ellen Swallow Richards invited 15 alumnae from 8 colleges to a meeting in Boston, Massachusetts. The purpose of this meeting was to create an organization of women college graduates that would assist women in finding greater opportunities to use their education, as well as promoting and assisting other women's college attendance. The Association of Collegiate Alumnae or ACA (AAUW's predecessor organization) was officially founded on January 14, 1882. The ACA also worked to improve st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Musical Acoustics
Musical acoustics or music acoustics is a multidisciplinary field that combines knowledge from physics, psychophysics, organology (classification of the instruments), physiology, music theory, ethnomusicology, signal processing and instrument building, among other disciplines. As a branch of acoustics, it is concerned with researching and describing the physics of music – how sounds are employed to make music. Examples of areas of study are the function of musical instruments, the human voice (the physics of speech and singing), computer analysis of melody, and in the clinical use of music in music therapy. The pioneer of music acoustics was Hermann von Helmholtz, a German polymath of the 19th century who was an influential physician, physicist, physiologist, musician, mathematician and philosopher. His book '' On the Sensations of Tone as a Physiological Basis for the Theory of Music'' is a revolutionary compendium of several studies and approaches that provided a complete n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doctor Of Philosophy
A Doctor of Philosophy (PhD, DPhil; or ) is a terminal degree that usually denotes the highest level of academic achievement in a given discipline and is awarded following a course of Postgraduate education, graduate study and original research. The name of the degree is most often abbreviated PhD (or, at times, as Ph.D. in North American English, North America), pronounced as three separate letters ( ). The University of Oxford uses the alternative abbreviation "DPhil". PhDs are awarded for programs across the whole breadth of academic fields. Since it is an earned research degree, those studying for a PhD are required to produce original research that expands the boundaries of knowledge, normally in the form of a Thesis, dissertation, and, in some cases, defend their work before a panel of other experts in the field. In many fields, the completion of a PhD is typically required for employment as a university professor, researcher, or scientist. Definition In the context o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solution (chemistry)
In chemistry, a solution is defined by IUPAC as "A liquid or solid phase containing more than one substance, when for convenience one (or more) substance, which is called the solvent, is treated differently from the other substances, which are called solutes. When, as is often but not necessarily the case, the sum of the mole fractions of solutes is small compared with unity, the solution is called a dilute solution. A superscript attached to the ∞ symbol for a property of a solution denotes the property in the limit of infinite dilution." One important parameter of a solution is the concentration, which is a measure of the amount of solute in a given amount of solution or solvent. The term " aqueous solution" is used when one of the solvents is water. Types ''Homogeneous'' means that the components of the mixture form a single phase. ''Heterogeneous'' means that the components of the mixture are of different phase. The properties of the mixture (such as concentration, temp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conductivity (electrolytic)
Conductivity or specific conductance of an electrolyte solution is a measure of its ability to conduct electricity. The SI unit of conductivity is siemens per meter (S/m). Conductivity measurements are used routinely in many industrial and environmental applications as a fast, inexpensive and reliable way of measuring the ionic content in a solution. For example, the measurement of product conductivity is a typical way to monitor and continuously trend the performance of water purification systems. In many cases, conductivity is linked directly to the total dissolved solids (TDS). High-quality deionized water has a conductivity of : \kappa = 0.05501 \pm 0.0001 μS/cm at 25 °C. This corresponds to a specific resistivity of : \rho = 18.18 \pm 0.03 MΩ⋅cm. The preparation of salt solutions often takes place in unsealed beakers. In this case the conductivity of purified water often is 10 to 20 times higher. A discussion can be found below. Typical drinking water is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
