|
Umesh Mishra
Umesh K. Mishra is a professor in the Electrical & Computer Engineering Department at the University of California, Santa Barbara (1990–present). In 2023, he was appointed dean of the UC Santa Barbara College of Engineering. He is the CTO, co-founder and board member of Transphorm, founded in 2007 and the first company to deliver gallium nitride (GaN) transistor products for high efficiency power conversion technologies. Prior to Transphorm, he co-founded Nitres Inc. in 1996, which was the first company to develop GaN LEDs and transistors. Career Mishra earned a B.Tech degree from the Indian Institute of Technology Kanpur, India in 1979. He went on earn his M.S. in Electrical Engineering at Lehigh University in 1981 and Ph.D. at Cornell University in 1984 and served as a principal staff engineer at General Electric. Mishra was elected to the National Academy of Engineering in 2009 for his contributions to the development of gallium nitride electronics and other high-speed, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Engineering
Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems that use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the latter half of the 19th century after the commercialization of the electric telegraph, the telephone, and electrical power generation, distribution, and use. Electrical engineering is divided into a wide range of different fields, including computer engineering, systems engineering, power engineering, telecommunications, radio-frequency engineering, signal processing, instrumentation, photovoltaic cells, electronics, and optics and photonics. Many of these disciplines overlap with other engineering branches, spanning a huge number of specializations including hardware engineering, power electronics, Electromagnetism, electromagnetics and waves, microwave engineering, nanotechnology, electrochemistry, renewable energies, mechatronics/control ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gallium Nitride
Gallium nitride () is a binary III/ V direct bandgap semiconductor commonly used in blue light-emitting diodes since the 1990s. The compound is a very hard material that has a Wurtzite crystal structure. Its wide band gap of 3.4 eV affords it special properties for applications in optoelectronics, high-power and high-frequency devices. For example, GaN is the substrate that makes violet (405 nm) laser diodes possible, without requiring nonlinear optical frequency doubling. Its sensitivity to ionizing radiation is low (like other group III nitrides), making it a suitable material for solar cell arrays for satellites. Military and space applications could also benefit as devices have shown stability in high-radiation environments. Because GaN transistors can operate at much higher temperatures and work at much higher voltages than gallium arsenide (GaAs) transistors, they make ideal power amplifiers at microwave frequencies. In addition, GaN offers promising c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornell University Alumni
Cornell University is a private Ivy League research university based in Ithaca, New York, United States. The university was co-founded by American philanthropist Ezra Cornell and historian and educator Andrew Dickson White in 1865. Since its founding, Cornell University has been a co-educational and nonsectarian institution. As of fall 2024, the student body included 16,128 undergraduate and 10,665 graduate students from all 50 U.S. states and 130 countries. The university is organized into eight undergraduate colleges and seven graduate divisions on its main Ithaca campus. Each college and academic division has near autonomy in defining its respective admission standards and academic curriculum. In addition to its primary campus in Ithaca, Cornell University administers three satellite campuses, including two in New York City, the medical school and Cornell Tech, and a branch of the medical school in Al Rayyan, Qatar's Education City. Cornell is o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinrich Welker
Heinrich Johann Welker (9 September 1912 in Ingolstadt – 25 December 1981 in Erlangen) was a German theoretical and applied physicist who invented the " transistron", a transistor made at Westinghouse independently of the first successful transistor made at Bell Laboratories. He did fundamental work in III-V compound semiconductors, and paved the way for microwave semiconductor elements and laser diodes. Biography and important work Starting in 1931, Welker studied at the University of Munich under Arnold Sommerfeld, and was granted a Ph.D. in 1936. The book '' Electrodynamics - Lectures on Theoretical Physics Volume III'' by Sommerfeld was based on lecture notes prepared by Welker during the winter semester of 1933/1934. Welker was granted his Habilitation under Sommerfeld in 1939.Mehra, Volume 6, Part 2, 2001, p. 868. During the war years, 1940 to 1945, Welker worked at Luftfunkforschungs Institut in Oberpfaffenhofen, but still maintained association (1942 to 1944) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
H-index
The ''h''-index is an author-level metric that measures both the productivity and citation impact of the publications, initially used for an individual scientist or scholar. The ''h''-index correlates with success indicators such as winning the Nobel Prize, being accepted for research fellowships and holding positions at top universities. The index is based on the set of the scientist's most cited papers and the number of citations that they have received in other publications. The index has more recently been applied to the productivity and impact of a scholarly journal as well as a group of scientists, such as a department or university or country. The index was suggested in 2005 by Jorge E. Hirsch, a physicist at UC San Diego, as a tool for determining theoretical physicists' relative quality and is sometimes called the Hirsch index or Hirsch number. Hirsch intended the ''h''-index to address the main disadvantages of other bibliometric indicators. The total number of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IEEE David Sarnoff Award
The IEEE David Sarnoff Award was a Technical Field Award presented in 1959–2016 by the Institute of Electrical and Electronics Engineers (IEEE). It was awarded annually for exceptional contributions to electronics. The award was established in 1959 by the RCA Corporation; in 1989 the Sarnoff Corporation became its sponsor. It consisted of a bronze medal, certificate and honorarium, and was presented each year to an individual or small team (up to three people). The award was discontinued in 2016. Recipients SourceIEEE See also * List of engineering awards * List of awards named after people This is a list of awards that are named after people. A B C D E F G H I J K L M N O P R S T U–V W Y Z See also *Lists of awards *List of eponyms *List of awards named after governors-g ... References {{DEFAULTSORT:Sarnoff Award David Sarnoff Award Awards established in 1959 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Academy Of Engineering
The National Academy of Engineering (NAE) is an American Nonprofit organization, nonprofit, NGO, non-governmental organization. It is part of the National Academies of Sciences, Engineering, and Medicine (NASEM), along with the National Academy of Sciences (NAS) and the National Academy of Medicine (NAM). The NAE operates engineering programs aimed at meeting national needs, encourages education and research, and recognizes the superior achievements of engineers. New members are annually elected by current members, based on their distinguished and continuing achievements in original research. The NAE is autonomous in its administration and in the selection of its members, sharing with the rest of the National Academies the role of advising the federal government. History The National Academies of Sciences, Engineering, and Medicine#History, National Academy of Sciences was created by an Act of Incorporation dated March 3, 1863, which was signed by then president of the United ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Economic Forum
The World Economic Forum (WEF) is an international non-governmental organization, international advocacy non-governmental organization and think tank, based in Cologny, Canton of Geneva, Switzerland. It was founded on 24 January 1971 by German engineer Klaus Schwab. The foundation's stated mission is "improving the state of the world by engaging business, political, academic, and other leaders of society to shape global, regional, and industry agendas". The foundation is mostly funded by its 1,000 member Multinational corporation, multi-national companies. The WEF is mostly known for its annual meeting at the end of January in Davos, a mountain resort in the canton of Graubünden, in the eastern Alps region of Switzerland. The meeting brings together some 3,000 paying members and selected participants – among whom are investors, business leaders, political leaders, economists, celebrities and journalists – for up to five days to discuss list of global issues, global issu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light-emitting Diode
A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresponding to the energy of the photons) is determined by the energy required for electrons to cross the band gap of the semiconductor. White light is obtained by using multiple semiconductors or a layer of light-emitting phosphor on the semiconductor device. Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared (IR) light. Infrared LEDs are used in remote-control circuits, such as those used with a wide variety of consumer electronics. The first visible-light LEDs were of low intensity and limited to red. Early LEDs were often used as indicator lamps, replacing small incandescent bulbs, and in seven-segment displays. Later developments produced LEDs available in visible, ultraviolet (U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transistor
A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch electrical signals and electric power, power. It is one of the basic building blocks of modern electronics. It is composed of semiconductor material, usually with at least three terminal (electronics), terminals for connection to an electronic circuit. A voltage or Electric current, current applied to one pair of the transistor's terminals controls the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Some transistors are packaged individually, but many more in miniature form are found embedded in integrated circuits. Because transistors are the key active components in practically all modern electronics, many people consider them one of the 20th century's greatest inventions. Physicist Julius Edgar Lilienfeld proposed the concept of a field-effect transisto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transphorm
Transphorm, Inc. is an American semiconductor company focused on producing transistors made from gallium nitride (GaN) for use in switched-mode power supplies. The company was acquired by Renesas Electronics in 2024. History Transphorm was founded in February 2007 in Delaware. It is headquartered in Goleta, California, close to the University of California at Santa Barbara (UCSB) from which the company is an offshoot and where the co-founder and CTO, Umesh Mishra, is a professor. In 2011, Google Ventures invested $20 million into Transphorm. The money is to assist the companies development of power conversion technologies. They also received capital from Kleiner Perkins and others amounting to $18 million. In September 2012, Transphorm released the TPH2006PS which was the first JEDEC qualified 600V HEMT in the industry. In November 2013, Transphorm teamed up with Fujitsu Semiconductor to integrate their GaN power devices into power supply businesses with Fujitsu as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Materials Science
Materials science is an interdisciplinary field of researching and discovering materials. Materials engineering is an engineering field of finding uses for materials in other fields and industries. The intellectual origins of materials science stem from the Age of Enlightenment, when researchers began to use analytical thinking from chemistry, physics, and engineering to understand ancient, phenomenological observations in metallurgy and mineralogy. Materials science still incorporates elements of physics, chemistry, and engineering. As such, the field was long considered by academic institutions as a sub-field of these related fields. Beginning in the 1940s, materials science began to be more widely recognized as a specific and distinct field of science and engineering, and major technical universities around the world created dedicated schools for its study. Materials scientists emphasize understanding how the history of a material (''processing'') influences its struc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
