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Frederick Charles Frank
Sir Frederick Charles Frank (6 March 1911 – 5 April 1998) was a British theoretical physicist. He is best known for his work on crystal dislocations, including (with Thornton Read) the idea of the Frank–Read source of dislocations. He also proposed the cyclol reaction in the mid-1930s, and made many other contributions to solid-state physics, geophysics, and the theory of liquid crystals. Early life and education He was born in Durban, South Africa, although his parents returned to England soon afterwards. He was educated at Thetford Grammar School and Ipswich School and went on to study chemistry at Lincoln College, Oxford, gaining a doctorate at the university's Engineering Laboratory. Career Prior to World War II, he worked as a physicist in Berlin and as a colloid chemist in Cambridge. During World War II he joined the Chemical Defence Experimental Station at Porton Down, Wiltshire, but in 1940 was transferred to the Air Ministry's Assistant Directorate of Intellig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Durban
Durban ( ; , from meaning "bay, lagoon") is the third-most populous city in South Africa, after Johannesburg and Cape Town, and the largest city in the Provinces of South Africa, province of KwaZulu-Natal. Situated on the east coast of South Africa, on the Natal Bay of the Indian Ocean, Durban is the Port of Durban, busiest port city in sub-Saharan Africa and was formerly named Port Natal. North of the harbour and city centre lies the mouth of the Umgeni River; the flat city centre rises to the hills of the Berea, Durban, Berea on the west; and to the south, running along the coast, is the Bluff, KwaZulu-Natal, Bluff. Durban is the seat of the larger eThekwini Metropolitan Municipality, which spans an area of and had a population of 4.2million in 2022 South African census, 2022, making the metropolitan population one of Africa's largest on the Indian Ocean. Within the city limits, Durban's population was 595,061 in 2011 South African census, 2011. The city has a humid subtr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frank–Van Der Merwe Growth
Frank–Van der Merwe growth (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 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 * Molecular-beam epitaxy Molecular-beam epitaxy (MBE) is an epitaxy method for thin-film deposition of single crystals. MBE is widely used in the manu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ipswich School
Ipswich School is a public school (English fee-charging boarding and day school) for pupils aged 3 to 18 in Ipswich, Suffolk, England. North of the town centre, Ipswich School has four parts on three adjacent sites. The Pre-Prep and Nursery were established in 1883 with the aim of preparing children aged 7 to 11 for entry into the Senior School. The Senior School occupies the main school site. The main buildings are a distinctive example of Victorian architecture, with Tudor style brick. The main building and chapel are both Grade II listed. The school buildings surround a central playing field and cricket square along with the Cricket Pavilion. The remainder of the School's sport's fields are located at a nearby site on the edge of the town. The School has a new purpose-built music school, adjacent to the Cricket Pavilion. Within the Senior School the students are divided into three: the Lower School (Years 7 and 8), the Middle School (Years 9–11) and the Sixth For ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thetford Grammar School
Thetford Grammar School is a private co-educational day school in Thetford, Norfolk, England. The school possibly dates back to the 7th century, which would make it one of the oldest schools in the United Kingdom. History The school website conjectures its origin traces back to 631,Thetford Grammar School - History , accessed 17 Aug 2009 and through its Roll of Headmasters to 1114. The Independent Schools Inspectorate assert in their 2012 report that "The school was originally founded in the 10th Century" but without any evidence provided. It appears to have ceased from around 1496 until its refoundation from the will of Sir Richard Fulmerston in 1566.'Thetford, chapter 23: Of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liquid Crystal
Liquid crystal (LC) is a state of matter whose properties are between those of conventional liquids and those of solid crystals. For example, a liquid crystal can flow like a liquid, but its molecules may be oriented in a common direction as in a solid. There are many types of LC Phase (matter), phases, which can be distinguished by their Optics, optical properties (such as Texture (crystalline), textures). The contrasting textures arise due to molecules within one area of material ("domain") being oriented in the same direction but different areas having different orientations. An LC material may not always be in an LC state of matter (just as water may be ice or water vapour). Liquid crystals can be divided into three main types: thermotropic, lyotropic, and #Metallotropic liquid crystals, metallotropic. Thermotropic and lyotropic liquid crystals consist mostly of organic molecules, although a few minerals are also known. Thermotropic LCs exhibit a phase transition into the L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geophysics
Geophysics () is a subject of natural science concerned with the physical processes and Physical property, properties of Earth and its surrounding space environment, and the use of quantitative methods for their analysis. Geophysicists conduct investigations across a wide range of scientific disciplines. The term ''geophysics'' classically refers to solid earth applications: Earth's figure of the Earth, shape; its gravitational, Earth's magnetic field, magnetic fields, and electromagnetic fields; its structure of the Earth, internal structure and Earth#Chemical composition, composition; its geodynamics, dynamics and their surface expression in plate tectonics, the generation of magmas, volcanism and rock formation. However, modern geophysics organizations and pure scientists use a broader definition that includes the water cycle including snow and ice; geophysical fluid dynamics, fluid dynamics of the oceans and the atmosphere; atmospheric electricity, electricity and magnetism in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solid-state Physics
Solid-state physics is the study of rigid matter, or solids, through methods such as solid-state chemistry, quantum mechanics, crystallography, electromagnetism, and metallurgy. It is the largest branch of condensed matter physics. Solid-state physics studies how the large-scale properties of solid materials result from their atomic-scale properties. Thus, solid-state physics forms a theoretical basis of materials science. Along with solid-state chemistry, it also has direct applications in the technology of transistors and semiconductors. Background Solid materials are formed from densely packed atoms, which interact intensely. These interactions produce the mechanical (e.g. hardness and Elasticity (physics), elasticity), Heat conduction, thermal, Electrical conduction, electrical, Magnetism, magnetic and Crystal optics, optical properties of solids. Depending on the material involved and the conditions in which it was formed, the atoms may be arranged in a regular, geometric patt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclol
The cyclol hypothesis is the now discredited first structural model of a folded, globular protein, formulated in the 1930s. It was based on the cyclol reaction of peptide bonds proposed by physicist Charles Frank in 1936, in which two peptide groups are chemically crosslinked. These crosslinks are covalent analogs of the non-covalent hydrogen bonds between peptide groups and have been observed in rare cases, such as the ergopeptides. Based on this reaction, mathematician Dorothy Wrinch hypothesized in a series of five papers in the late 1930s a structural model of globular proteins. She postulated that, under some conditions, amino acids will spontaneously make the maximum possible number of cyclol crosslinks, resulting in cyclol molecules and cyclol fabrics. She further proposed that globular proteins have a tertiary structure corresponding to Platonic solids and semiregular polyhedra formed of cyclol fabrics with no free edges. In contrast to the cyclol reaction itself ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dislocation
In materials science, a dislocation or Taylor's dislocation is a linear crystallographic defect or irregularity within a crystal structure that contains an abrupt change in the arrangement of atoms. The movement of dislocations allow atoms to slide over each other at low stress levels and is known as ''glide'' or Slip (materials science), slip. The crystalline order is restored on either side of a ''glide dislocation'' but the atoms on one side have moved by one position. The crystalline order is not fully restored with a ''partial dislocation''. A dislocation defines the boundary between ''slipped'' and ''unslipped'' regions of material and as a result, must either form a complete loop, intersect other dislocations or defects, or extend to the edges of the crystal. A dislocation can be characterised by the distance and direction of movement it causes to atoms which is defined by the Burgers vector. Plasticity (physics), Plastic deformation of a material occurs by the creation and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physicist
A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate causes of Phenomenon, phenomena, and usually frame their understanding in mathematical terms. They work across a wide range of Physics#Research fields, research fields, spanning all length scales: from atom, sub-atomic and particle physics, through biological physics, to physical cosmology, cosmological length scales encompassing the universe as a whole. The field generally includes two types of physicists: Experimental physics, experimental physicists who specialize in the observation of natural phenomena and the development and analysis of experiments, and Theoretical physics, theoretical physicists who specialize in mathematical modeling of physical systems to rationalize, explain and predict natural phenomena. Physicists can apply their k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fernand Holweck Medal And Prize
The Fernand Holweck Medal and Prize is a major European prize for Physics awarded jointly every year by the British Institute of Physics (IOP) and the Société Française de Physique (SFP). It is one of the four Grand Prix of the SFP and one of the four International Bilateral Awards of the IOP, consisting of a gold medal and a 3000€ cash prize. History The prize was established in 1945 as a memorial to Fernand Holweck and other French physicists who were persecuted or killed by the Nazis during the German occupation of France during World War II, from 1940 to 1945. It was originally a £150 prize. It is awarded for distinguished work in experimental physics (which reflects Holweck's scientific interest) or in theoretical physics which is closely related to experimentation. The Holweck Prize is awarded every year, alternately to a French physicist and a British or Irish physicist. In 1974 two awards were made to mark the centenaries of the two societies. Holweck Laureat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Society Bakerian Medal
The Bakerian Medal is one of the premier medals of the Royal Society that recognizes exceptional and outstanding science. It comes with a medal award and a prize lecture. The medalist is required to give a lecture on any topic related to physical sciences. It is awarded annually to individuals in the field of physical sciences, including computer science. History The prize was started in 1774, when Henry Baker left £100 to establish a spoken lecture given by a Fellow of the Royal Society about natural history or experimental philosophy. Awardees Source: 21st century * 2025 Ingrid Daubechies, ''for her outstanding work on wavelets and image compression and her exceptional contributions to a wide spectrum of physical, technological, and mathematical applications'' * 2024 Michele Dougherty, ''for her scientific leadership of the Cassini magnetic field instrument at Saturn, seminal research findings on potential life support on Enceladus and leadership of forthcoming missions to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
