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Nico F. Declercq
Nico Felicien Declercq ( Kortrijk ( Belgium), 27 December 1975) is a physicist and mechanical engineer. He is a professor with the Georgia Institute of Technology in Atlanta and Georgia Tech Lorraine in France. He is specialized in ultrasonic nondestructive evaluation of materials, propagation of ultrasonic waves in highly complex materials, in acoustics, in theoretical and experimental linear and nonlinear ultrasonics, acousto-optics, Medical Physics and Acoustic Microscopy. He has investigated the acoustics of Chichen Itza and Epidaurus. Education, career and awards Declercq received his BSc and MSc in physics (with a major in astrophysics) from the Katholieke Universiteit Leuven in 1996 and 2000, respectively, and received a PhD in engineering physics from Ghent University in 2005. He worked as a Belgian National Science Foundation (FWO Vlaanderen) postdoctoral fellow with Ghent University and has been a visiting scientist, supported by NATO, at the National Cente ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kortrijk
Kortrijk ( , ; vls, Kortryk or ''Kortrik''; french: Courtrai ; la, Cortoriacum), sometimes known in English as Courtrai or Courtray ( ), is a Belgian city and municipality in the Flemish province of West Flanders. It is the capital and largest city of the judicial and administrative arrondissement of Kortrijk. The wider municipality comprises the city of Courtrai proper and the villages of Aalbeke, Bellegem, Bissegem, Heule, Kooigem, Marke, and Rollegem. Courtrai is also part of the cross-border Lille-Kortrijk-Tournai metropolitan area. The city is on the river Leie, southwest of Ghent and northeast of Lille. Mouscron in Wallonia is just south of Courtrai. Courtrai originated from a Gallo-Roman town, ''Cortoriacum'', at a crossroads near the Leie river and two Roman roads. In the Middle Ages, Courtrai grew significantly thanks to the flax and wool industry with France and England and became one of the biggest and richest cities in Flanders. The city is often referred to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karava
Karava () is a Sinhalese speaking ethnic group of Sri Lanka, whose ancestors from ancient times migrated from the Coromandel coast, claiming lineage to the Kaurava royalty of the old Kingdom of Kuru in Northern India. The Tamil equivalent is Karaiyar. Both groups are also known as the Kurukula (Kuru clan). The last mass migration to Sri Lanka happened in the 15th century from Tamil Nadu to fight against the Mukkuvar confederation as mentioned in the Mukkara Hatana. They have also given great importance to trade and commerce. The elite families are involved in entrepreneurial activities including the development of plantation agriculture such as coconut, tea and rubber. Etymology The origins of the term ''Karava'' are still debated. The name might be a modified version of the Tamil ''Karaiyar'', where "Karava" has the same root word ''kara'' or ''karai'' meaning "coast" or "shore" in Tamil. The name "Karava" has also been proposed to be a corruption of the Sanskrit name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epidaurus
Epidaurus ( gr, Ἐπίδαυρος) was a small city ('' polis'') in ancient Greece, on the Argolid Peninsula at the Saronic Gulf. Two modern towns bear the name Epidavros: '' Palaia Epidavros'' and '' Nea Epidavros''. Since 2010 they belong to the new municipality of Epidaurus, part of the regional unit of Argolis. The seat of the municipality is the town Lygourio. The nearby sanctuary and ancient theatre were inscribed on the UNESCO World Heritage List in 1988 because of their exemplary architecture and importance in the development and spread of healing sanctuaries and cults across the ancient Greek and Roman worlds. Name and etymology The name “Epidaurus” is of Greek origin. It was named after the hero Epidauros, son of Apollo. According to Strabo, the city was originally named Ἐπίκαρος (Epíkaros) under the Carians, ( Aristotle claimed that Caria, as a naval empire, occupied Epidaurus and Hermione) before taking the name Ἐπίταυρος (Epít ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chichen Itza
Chichen Itza , es, Chichén Itzá , often with the emphasis reversed in English to ; from yua, Chiʼchʼèen Ìitshaʼ () "at the mouth of the well of the Itza people" was a large pre-Columbian city built by the Maya people of the Terminal Classic period. The archeological site is located in Tinúm Municipality, Yucatán State, Mexico. Chichen Itza was a major focal point in the Northern Maya Lowlands from the Late Classic (c. AD 600–900) through the Terminal Classic (c. AD 800–900) and into the early portion of the Postclassic period (c. AD 900–1200). The site exhibits a multitude of architectural styles, reminiscent of styles seen in central Mexico and of the Puuc and Chenes styles of the Northern Maya lowlands. The presence of central Mexican styles was once thought to have been representative of direct migration or even conquest from central Mexico, but most contemporary interpretations view the presence of these non-Maya styles more as the result of cul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acoustic Microscopy
Acoustic microscopy is microscopy that employs very high or ultra high frequency ultrasound. Acoustic microscopes operate non-destructively and penetrate most solid materials to make visible images of internal features, including defects such as cracks, delaminations and voids. History The notion of acoustic microscopy dates back to 1936 when S. Ya. Sokolov proposed a device for producing magnified views of structure with 3-GHz sound waves. However, due to technological limitations at the time, no such instrument could be constructed, and it was not until 1959 that Dunn and Fry performed the first acoustic microscopy experiments, though not at very high frequencies. The scientific literature shows very little progress toward an acoustic microscope following the Dunn and Fry experiments up until about 1970 when two groups of activity emerged, one headed by C.F. Quate (Stanford University) and the other by A. Korpel and L.W. Kessler (Zenith Radio Research Labs). The first efforts t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medical Physics
Medical physics deals with the application of the concepts and methods of physics to the prevention, diagnosis and treatment of human diseases with a specific goal of improving human health and well-being. Since 2008, medical physics has been included as a health profession according to International Standard Classification of Occupation of the International Labour Organization. Although medical physics may sometimes also be referred to as ''biomedical physics'', ''medical biophysics'', ''applied physics in medicine'', ''physics applications in medical science'', ''radiological physics'' or ''hospital radio-physics'', however a "medical physicist" is specifically a health professional with specialist education and training in the concepts and techniques of applying physics in medicine and competent to practice independently in one or more of the subfields of medical physics. Traditionally, medical physicists are found in the following healthcare specialties: radiation oncology ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acousto-optic Effect
Acousto-optics is a branch of physics that studies the interactions between sound waves and light waves, especially the diffraction of laser light by ultrasound (or sound in general) through an ultrasonic grating. Introduction Optics has had a very long and full history, from ancient Greece, through the renaissance and modern times. As with optics, acoustics has a history of similar duration, again starting with the ancient Greeks. In contrast, the acousto-optic effect has had a relatively short history, beginning with Brillouin predicting the diffraction of light by an acoustic wave, being propagated in a medium of interaction, in 1922. This was then confirmed with experimentation in 1932 by Debye and Sears, and also by Lucas and Biquard. The particular case of diffraction on the first order, under a certain angle of incidence, (also predicted by Brillouin), has been observed by Rytow in 1935. Raman and Nath (1937) have designed a general ideal model of interaction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultrasonics
Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" (audible) sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz (20,000 hertz) in healthy young adults. Ultrasound devices operate with frequencies from 20 kHz up to several gigahertz. Ultrasound is used in many different fields. Ultrasonic devices are used to detect objects and measure distances. Ultrasound imaging or sonography is often used in medicine. In the nondestructive testing of products and structures, ultrasound is used to detect invisible flaws. Industrially, ultrasound is used for cleaning, mixing, and accelerating chemical processes. Animals such as bats and porpoises use ultrasound for locating prey and obstacles. History Acoustics, the science of sound, starts as far back as Pythagoras in the 6th century BC, who wrote o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acoustics
Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics technology may be called an acoustical engineer. The application of acoustics is present in almost all aspects of modern society with the most obvious being the audio and noise control industries. Hearing is one of the most crucial means of survival in the animal world and speech is one of the most distinctive characteristics of human development and culture. Accordingly, the science of acoustics spreads across many facets of human society—music, medicine, architecture, industrial production, warfare and more. Likewise, animal species such as songbirds and frogs use sound and hearing as a key element of mating rituals or for marking territories. Art, craft, science and technology h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nondestructive Testing
Nondestructive testing (NDT) is any of a wide group of analysis techniques used in science and technology industry to evaluate the properties of a material, component or system without causing damage. The terms nondestructive examination (NDE), nondestructive inspection (NDI), and nondestructive evaluation (NDE) are also commonly used to describe this technology. Because NDT does not permanently alter the article being inspected, it is a highly valuable technique that can save both money and time in product evaluation, troubleshooting, and research. The six most frequently used NDT methods are eddy-current, magnetic-particle, liquid penetrant, radiographic, ultrasonic, and visual testing. NDT is commonly used in forensic engineering, mechanical engineering, petroleum engineering, electrical engineering, civil engineering, systems engineering, aeronautical engineering, medicine, and art. Innovations in the field of nondestructive testing have had a profound impact on med ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georgia Tech Lorraine
Georgia Tech Europe (GTE) is a campus of the Georgia Institute of Technology in Metz, France and is part of Georgia Tech's International Plan. GTE offers undergraduate and graduate programs in electrical and computer engineering, mechanical engineering, computer science, and liberal arts. Organization Georgia Tech Europe is integrated into French and American structures—it is an affiliate of the Georgia Institute of Technology, and it is incorporated under French law as a non-profit organization (“Association à but non lucratif"). GTE is also home to a sponsored research program through the Georgia Tech – CNRS Unité Mixte Internationale (GT-CNRS UMI 2958), an international joint laboratory between the Georgia Institute of Technology in Atlanta, Georgia, United States, and the French National Centre for Scientific Research in the area of advanced materials, secured networks, non-linear dynamics and optics, and robotics. History Georgia Tech-Europe was established as Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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