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Jan H Van Der Merwe
Johannes Hendrik van der Merwe (28 February 1922 - 28 February 2016) was a South Africa, South African mathematician and physicist. The Frank–van der Merwe growth, Frank–Van der Merwe crystal growth model carries his name and he was awarded numerous South African academic prizes. He is sometimes referred to as the "Father of Epitaxy". His research is seen as fundamental to applications in communication technology. Education and early life Van der Merwe was born on 28 February 1922 to Dorslandtrekkers Johannes Marthinus van der Merwe and Catharina Margaretha van der Merwe in Humpata, Portuguese Angola, Angola. Although his parents both came from large families—his father had four siblings and his mother had five siblings—he was an only child. In 1928, he and his family moved to South West Africa. It is believed that they travelled by ox-wagon. During his formative years the family moved between present day Outjo and Gobabis and finally settled in Otjiwarongo, where he f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humpata
Humpata is a town and municipality in the province of Huíla, Angola. The municipality had a population of 89,144 in 2014. Humpata was the primary destination of the Trekboers on the Dorsland Trek in the 1870s. These Afrikaners formed the majority population in the area for some time, before leaving to South West Africa after World War I, though some stayed until 1975, on the onset of the Angolan Civil War The Angolan Civil War ( pt, Guerra Civil Angolana) was a civil war in Angola, beginning in 1975 and continuing, with interludes, until 2002. The war immediately began after Angola became independent from Portugal in November 1975. The war was .... See also * Voortrekkers * Dorsland Trek * History of Angola * Trekboers References Populated places in Huíla Province Municipalities of Angola Great Trek {{Angola-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Council For Scientific And Industrial Research
The Council for Scientific and Industrial Research (CSIR) is South Africa's central and premier scientific research and development organisation. It was established by an act of parliament in 1945 and is situated on its own campus in the city of Pretoria. It is the largest research and development (R&D) organisation in Africa and accounts for about 10% of the entire African R&D budget. It has a staff of approximately 3,000 technical and scientific researchers, often working in multi-disciplinary teams. CSIR contract research and development Overview The CSIR contract R&D portfolio aims to enable clear understanding of national imperatives and the needs of industry to optimise the impact of the CSIR's R&D outputs. It leverages public, private and international partnerships in support of cutting-edge science, engineering and technology (SET).The organisation has clients in both the private sector (micro, small, medium and large enterprises; formal and informal), as well as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Differential Equation
In mathematics, a differential equation is an equation that relates one or more unknown functions and their derivatives. In applications, the functions generally represent physical quantities, the derivatives represent their rates of change, and the differential equation defines a relationship between the two. Such relations are common; therefore, differential equations play a prominent role in many disciplines including engineering, physics, economics, and biology. Mainly the study of differential equations consists of the study of their solutions (the set of functions that satisfy each equation), and of the properties of their solutions. Only the simplest differential equations are solvable by explicit formulas; however, many properties of solutions of a given differential equation may be determined without computing them exactly. Often when a closed-form expression for the solutions is not available, solutions may be approximated numerically using computers. The theory of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Virginia
The University of Virginia (UVA) is a public research university in Charlottesville, Virginia. Founded in 1819 by Thomas Jefferson, the university is ranked among the top academic institutions in the United States, with highly selective admission. Set within the Academical Village, a UNESCO World Heritage Site, the university is referred to as a "Public Ivy" for offering an academic experience similar to that of an Ivy League university. It is known in part for certain rare characteristics among public universities such as its historic foundations, student-run honor code, and secret societies. The original governing Board of Visitors included three U.S. presidents: Jefferson, James Madison, and James Monroe. The latter as sitting President of the United States at the time of its foundation. As its first two rectors, Presidents Jefferson and Madison played key roles in the university's foundation, with Jefferson designing both the original courses of study and the u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of The Witwatersrand
The University of the Witwatersrand, Johannesburg (), is a multi-campus South African public research university situated in the northern areas of central Johannesburg. It is more commonly known as Wits University or Wits ( or ). The university has its roots in the mining industry, as do Johannesburg and the Witwatersrand in general. Founded in 1896 as the South African School of Mines in Kimberley, it is the third oldest South African university in continuous operation. The university has an enrolment of 40,259 students as of 2018, of which approximately 20 percent live on campus in the university's 17 residences. 63 percent of the university's total enrolment is for undergraduate study, with 35 percent being postgraduate and the remaining 2 percent being Occasional Students. The 2017 Academic Ranking of World Universities (ARWU) places Wits University, with its overall score, as the highest ranked university in Africa. Wits was ranked as the top university in South Africa in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frank Nabarro
Frank Reginald Nunes Nabarro MBE OMS FRS (7 March 1916 – 20 July 2006) was an English-born South African physicist and one of the pioneers of solid-state physics, which underpins much of 21st-century technology. Education Born 7 March 1916 in London, UK, into a Sephardi Jewish family, he studied at Nottingham High School, then at New College, Oxford where he obtained a first-class honours degree in physics in 1937 and another in mathematics in 1938. At the University of Bristol his work under Professor Nevill Francis Mott, a future Nobel Laureate in physics, earned him the Oxford degree of BSc (then equivalent to an MSc elsewhere). Then followed an M.A. in 1945. Within a few years he had risen to a leading role in the field of crystal lattice dislocations and plasticity. In this period he wrote a number of seminal papers which are still cited. Later papers and the books that he published cemented his dominance of the field. (See also Egon Orowan) Military and academic c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Pretoria
The University of Pretoria ( af, Universiteit van Pretoria, nso, Yunibesithi ya Pretoria) is a multi-campus public research university in Pretoria, the administrative and de facto capital of South Africa. The university was established in 1908 as the Pretoria campus of the Johannesburg-based Transvaal University College and is the fourth South African institution in continuous operation to be awarded university status. The university has grown from the original 32 students in a single late Victorian house to approximately 53,000 in 2019. The university was built on seven suburban campuses on . The university is organised into nine faculties and a business school. Established in 1920, the University of Pretoria Faculty of Veterinary Science is the second oldest veterinary school in Africa and the only veterinary school in South Africa. In 1949, the university launched the first MBA programme outside North America, and the university's Gordon Institute of Business Science (GIBS ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frank–Van Der Merwe Growth
Frank–Van der Merwe growth (or FM growth) is one of the three primary modes by which thin films grow epitaxially at a crystal surface or interface. It is also known as 'layer-by-layer growth'. It is considered an ideal growth model, requiring perfect lattice matching between the substrate and the layer growing on to it, and it is usually limited to homoepitaxy. For FM growth to occur, the atoms that are to be deposited should be more attracted to the substrate than to each other, which is in contrast to the layer-plus-island growth model. FM growth is the preferred growth model for producing smooth films. It was first described by South African physicist Jan van der Merwe and British physicist Frederick Charles Frank in a series of four papers based on Van der Merwe's PhD research between 1947 and 1949. See also * Epitaxy * Thin films A thin film is a layer of material ranging from fractions of a nanometer ( monolayer) to several micrometers in thickness. The controll ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epitaxy
Epitaxy refers to a type of crystal growth or material deposition in which new crystalline layers are formed with one or more well-defined orientations with respect to the crystalline seed layer. The deposited crystalline film is called an epitaxial film or epitaxial layer. The relative orientation(s) of the epitaxial layer to the seed layer is defined in terms of the orientation of the crystal lattice of each material. For most epitaxial growths, the new layer is usually crystalline and each crystallographic domain of the overlayer must have a well-defined orientation relative to the substrate crystal structure. Epitaxy can involve single-crystal structures, although grain-to-grain epitaxy has been observed in granular films. For most technological applications, single domain epitaxy, which is the growth of an overlayer crystal with one well-defined orientation with respect to the substrate crystal, is preferred. Epitaxy can also play an important role while growing superlatti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doris Kuhlmann-Wilsdorf
Doris Kuhlmann-Wilsdorf (February 15, 1922 – March 25, 2010) was a German metallurgist. Biography Doris Kuhlmann-Wilsdorf was born in Bremen, Germany on February 15, 1922, to Adolph Friedrich and Elsa Kuhlmann. She attended the University of Göttingen from 1942 where she received her doctorate in materials science in 1947. Kuhlmann-Wilsdorf continued her research under Sir Nevill Francis Mott at the University of Bristol. She married Heinz Wilsdorf in 1950, with whom she travelled to University of the Witwatersrand to work as a lecturer in the same year. In 1956 they moved to the United States to work at the University of Virginia as professors in the Physics and Materials Science departments. She was named university professor of applied science in 1966; she was the first woman named as a full professor at the University of Virginia outside the schools of Medicine and Nursing. In 1994 Kuhlmann-Wilsdorf and her husband funded a professorship in their name and former students ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Mannering Tyndall
Arthur Mannering Tyndall, CBE, FRS, LLD (18 September 1881 – 29 October 1961) was an English physicist from Bristol, England.His teaching activities included lecturing in atomic physics at the University of Bristol. Among his notable students was Paul Dirac, who he introduced to the laws of quantum theory. The university's other early staff included John Edward Lennard-Jones, Beryl May Dent, Herbert Wakefield Banks Skinner Herbert Wakefield Banks Skinner (7 October 1900 – 20 January 1960) was a British physicist. Biography Skinner was born on 7 October 1900 at 15 Woodville Road, Ealing, the only son of George Herbert, director of the shoe firm Lilley & Skinn ... and William Sucksmith. References {{DEFAULTSORT:Tyndall, Arthur Mannering 1881 births 1961 deaths Fellows of the Royal Society Academics of the University of Bristol 20th-century British physicists Scientists from Bristol Academics of University College Bristol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
