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Biography
John Boardman
Jack Melton Boardman, commonly known as John Boardman, (born September 8, 1932) is an American physicist. He is a former professor of physics at Brooklyn College; a noted science fiction fan, author and fanzine publisher; and a gaming authority. Boardman earned his B.A. at the University of Chicago in 1952 and his M.S. from Iowa State University in 1956. He then attended Florida State Univers
  • 444
  • 26 Dec 2022
Biography
Moritz Ludwig Frankenheim
Moritz Ludwig Frankenheim (June 29, 1801 – January 14, 1869) was a German physicist, geographer, and crystallographer. Moritz Ludwig Frankenheim was born in 1801 in Brunswick. His family was Jewish.[1] He attended the Gymnasium (high school) there and in Wolfenbüttel. Afterwards he went to Berlin to attend the Alma Mater Berolinensis (today Humboldt University of Berlin) to study physics.
  • 532
  • 26 Dec 2022
Biography
Petr Beckmann
Petr Beckmann (November 13, 1924 – August 3, 1993) was a professor of electrical engineering who became a well-known advocate of libertarianism and nuclear power. Later in his life he challenged Albert Einstein's theory of relativity and other accepted theories in modern physics. In 1939, when Beckmann was 14, his family fled their home in Prague, Czechoslovakia to escape the Nazis. From 19
  • 417
  • 26 Dec 2022
Biography
Yuri N. Gnedin
Prof. Dr. Yuri N. Gnedin was an outstanding astrophysicist whose scientific interests and expertise were extraordinarily wide. He was an expert in theoretical investigation of the polarized radiation transfer, generation of high-energy radiation in close binary star systems and galactic nuclei, and cyclotron lines in spectra of accreting neutron stars. Prof. Dr. Yuri N. Gnedin developed the pion
  • 765
  • 20 Dec 2022
Topic Review
Nanocrystalline Magnetic Semiconductors for Spintronics
Сhallenge for spintronics is to find new ways for the control of electronic phenomena and magnetic properties of solids at nanoscale. Some promising aspects are connected with developing new materials. The research highlights the areas devoted to the creation of new functional materials for spintronics based on magnetic semiconductors and demonstrates the technical possibilities of creating various devices, in particular, a maser, a p-n junction with a colossal magnetoresistance, a spin valve, a magnetic lens, modulators, spin wave amplifier, etc. A magnetic semiconductor is a magnetic material that, in terms of specific conductivity, occupies an intermediate position between a conductor and an insulator, and has a band gap comparable to ~kBT. Most known magnetic semiconductors (SC) are either oxides or chalcogenides (sulfides, selenides and tellurides) of 3d transition metals, rare earth 4f metals or a combination. Spintronics (spin electronics) studies spin current transfer (spin-polarized transport) in condensed media, including contact structures, heterostructures, superlattices and multilayers. Much attention is paid to the mechano-physical methods of obtaining of high-density transparent nanoceramics based on magnetic semiconductors. The potential possibility of using nanoceramics as an absorber of solar energy, as well as in modulators of electromagnetic radiation, is also presented. The THz magneto-optics in magnetic semiconductors is shown to be beneficial to the intensively developing fields of spintronics – ultrafast magnetooptics and magnetophotonics in magnetic semiconductors.
  • 636
  • 20 Dec 2022
Topic Review
X-ray Images and Spectrograms with Spatial Resolution
X-ray imaging diagnostics based on Fresnel lenses are very promising as the field of view is of the order of 1 mm and even higher, and the spatial resolution can reach hundreds of nm. The obvious disadvantage of such diagnostics is the presence of the chromatic effect, which reduces the contrast of the image and leads to the need to use a rather narrow spectral range. The spectrographs with flat or curved crystals used have a satisfactory spectral resolution but cannot always provide sufficient luminosity and spatial resolution when it comes to obtaining images of plasma sources. Spectrometers with toroidal schemes do not have these disadvantages, but their surface is much more difficult to fabricate and the resulting schemes are difficult to set up because of the limitation in all six degrees of freedom.
  • 593
  • 16 Dec 2022
Biography
Carl Eckart
Carl Henry Eckart (May 4, 1902 in St. Louis, Missouri – October 23, 1973 in La Jolla, California ) was an United States physicist, physical oceanographer, geophysicist, and administrator. He co-developed the Wigner–Eckart theorem and is also known for the Eckart conditions in quantum mechanics,[1] and the Eckart–Young theorem in linear algebra.[2] Eckart began college in 1919 at Washing
  • 453
  • 14 Dec 2022
Topic Review
Biosensing Applications of GLAD-Fabricated Nanostructures
Glancing angle deposition (GLAD) is a technique for the fabrication of sculpted micro- and nanostructures under the conditions of oblique vapor flux incident and limited adatom diffusion. GLAD-based nanostructures are emerging platforms with broad sensing applications due to their high sensitivity, enhanced optical and catalytic properties, periodicity, and controlled morphology. GLAD-fabricated nanochips and substrates for chemical and biosensing applications are replacing conventionally used nanomaterials due to their broad scope, ease of fabrication, controlled growth parameters, and hence, sensing abilities.
  • 460
  • 13 Dec 2022
Biography
Willi A. Kalender
Willi A. Kalender (born 1 August 1949) is a German Medical Physicist and Professor and Chairman of the Institute of Medical Physics of the University of Erlangen-Nuremberg.[1] Kalender has produced several new technologies in the field of diagnostic radiology imaging. Kalender is a Fellow of the American Association of Physicists in Medicine (AAPM) and Honorary Fellow of the British Institute o
  • 505
  • 13 Dec 2022
Biography
Gregory S. Boebinger
Gregory Scott Boebinger is the director of the National High Magnetic Field Laboratory in Tallahassee, Florida, and a professor of physics at Florida State University. Boebinger was born June 29, 1959 in Indianapolis, Indiana, one of four sons of a minister and an elementary-school teacher. He is a 1977 graduate of North Central High School in Indianapolis. He married his high-school sweethea
  • 342
  • 13 Dec 2022
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