Results 241 to 250 of about 17,793 (302)
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Applied Optics, 1992
We describe the design, construction, and performance of a resonant cryogenic chopper that operates at 4.2 K. The chopper is mechanically and thermally robust; it can occult a 2.54-cm aperture at 4.5 Hz while dissipating ~1 mW. Both the stator and rotor magnetic fields are controllable to allow for performance optimization and to help in measuring any ...
L A, Page, E S, Cheng, S S, Meyer
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We describe the design, construction, and performance of a resonant cryogenic chopper that operates at 4.2 K. The chopper is mechanically and thermally robust; it can occult a 2.54-cm aperture at 4.5 Hz while dissipating ~1 mW. Both the stator and rotor magnetic fields are controllable to allow for performance optimization and to help in measuring any ...
L A, Page, E S, Cheng, S S, Meyer
openaire +2 more sources
Generalized chopper stabilization
ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196), 2002The concept of traditional chopper-stabilized amplifiers is extended to linear dynamical and certain types of nonlinear circuits. Simulation results are given to confirm the theory.
László Tóth 0007, Yannis P. Tsividis
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2010 20th International Conference on Electronics Communications and Computers (CONIELECOMP), 2010
AC choppers are a family of ac-to-ac power converters that can be derived from the traditional dc-to-dc converters. Research activity in this kind of converter has recently increased in applications for power conditioning—such as voltage control in the distribution system and power flow control in the transmission system—as an alternative for the dc ...
Julio Cesar Rosas-Caro +7 more
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AC choppers are a family of ac-to-ac power converters that can be derived from the traditional dc-to-dc converters. Research activity in this kind of converter has recently increased in applications for power conditioning—such as voltage control in the distribution system and power flow control in the transmission system—as an alternative for the dc ...
Julio Cesar Rosas-Caro +7 more
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A correlation chopper or chopper with coding disk
Nuclear Instruments and Methods, 1974Abstract The properties of various decoding methods of results obtained by a correlation chopper are analysed. A new method of diminishing the background was demonstrated. Some conclusions leading to construction of new devices are presented.
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Long Range Planning, 2006
This article explores the conditions under which organizational change increases the risk of organizational failure. To reach this goal, we examine the pros and cons of flexibility and inertia arguments. Empirically, we measure the survival consequences of product portfolio expansion in the British motorcycle industry during the period from 1895 to ...
Wezel, F C, van Witteloostuijn, A
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This article explores the conditions under which organizational change increases the risk of organizational failure. To reach this goal, we examine the pros and cons of flexibility and inertia arguments. Empirically, we measure the survival consequences of product portfolio expansion in the British motorcycle industry during the period from 1895 to ...
Wezel, F C, van Witteloostuijn, A
openaire +2 more sources
2022
Toward the end of the Pleistocene, the world experienced a mass extinction of megafauna. In North America these included its proboscideans – the mammoths and mastodons. Researchers in conservation biology, paleontology, and archaeology have debated the role played by human predation in these extinctions.
Otarola-Castillo, Erik +2 more
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Toward the end of the Pleistocene, the world experienced a mass extinction of megafauna. In North America these included its proboscideans – the mammoths and mastodons. Researchers in conservation biology, paleontology, and archaeology have debated the role played by human predation in these extinctions.
Otarola-Castillo, Erik +2 more
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2001
Abstract One of the things which most astonished almost all the participants in these controversies was the sheer inability of their adversaries to understand the plain meaning of scripture.Indeed, the very fact that so much else was held in common made their disagreement on this all the more puzzling—foes who had begun as members of a ...
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Abstract One of the things which most astonished almost all the participants in these controversies was the sheer inability of their adversaries to understand the plain meaning of scripture.Indeed, the very fact that so much else was held in common made their disagreement on this all the more puzzling—foes who had begun as members of a ...
openaire +1 more source
AMATERAS: A Cold-Neutron Disk Chopper Spectrometer
Journal of the Physical Society of Japan, 2011Seikô Ohira-Kawamura +2 more
exaly