نتایج جستجو برای: microwave switch
تعداد نتایج: 110662 فیلتر نتایج به سال:
∗ Liam Devlin is with Plextek Communications Technology Consultants, London Road, Great Chesterford, Essex, CB10 1NY Tel: +44 (0)1799 533200 Fax: +44 (0)1799 533201 Email: [email protected] Integrated analogue switches can easily be designed using any Field Effect Transistor (FET) based process [1]. The challenges in switch design tend to come in extending the upper operating frequency and/or i...
The periodic trimming of the long hairs growing at the distal end of the tail -switch trimming- is humane alternative of tail docking. The purpose of this study was to determine the influence of switch trimming on somatic cell count (SCC), California mastitis test (CMT) and udder cleanliness of lactating cows in a free-stall dairy farm. In the present study, 219 healthy, pregnant Holstein cows ...
Background: Microwave Thermotherapy has been gradually used in radiotherapy and it is reported that microwave radiation increases bone demineralization rate independently of temperature. Furthermore, it becomes more and more widespread that the damage caused by the synergistic effect of microwave radiation and hypergravity. The experiment was designed to investigate the effect of microwa...
optoelectronic GaAs static induction transistor,’’ IEEE Electron Device Lett., vol. 14, no. 4, 1993, pp. 190–192. 18. F.C. Lee, D. Boroyevich, S.K. Mazumder, K. Xing, H. Dai, I. Milosavljevic, Z. Ye, T. Lipo, J. Vinod, G. Sinha, G. Oriti, J.B. Baliga, A. Ramamurthy, A.W. Kelley, and K. Armstrong, Power Electronics Building Blocks and System Integration, Blacksburg, Virginia: Virgin Power Electr...
With the development of science and technology, microwave has been used in many fields such as industry, military, medicine and communication. People are living in a lapped and dynamic electromagnetic environment. Concerns about potential hazards of microwave are getting increasing attentions. The single biological effects of microwave were widely discussed which was considered harmful. Relevan...
In this paper, a new non-isolated transformerless high step up Dc-Dc converter with low voltage stress on the active switch for solar energy application is proposed. The converter topology is simple, which makes the control scheme simple. In this converter, only one active switch is used which makes reducing the switching power loss. The voltage gain of the proposed converter is higher than the...
In this paper, we present a switch based on coupling and resonance in thegraphene plate and rings operating at 10 THz. This structure consists of several layers ofHexagonal Boron Nitride (hBN), SiO2 and P+Si, such that graphene plates and rings areinside the hBN layer. The terahertz wave is incident from the upper part of the switchand Surface Plasmons (SPs) are excited ...
Background: Due to the increase of public concern about the physical and psychological effects of radiation on the health of cell phone users, the present study aimed to determine public exposure to microwave propagation from current cell phones in different user conditions. Methods: In this cross-sectional study, the effective intensity of microwave radiation from cell phone were measured...
Microwave dyeing was carried out under a variety of conditions in terms of the power and time of a microwave to investigate the effects of microwaving on the dyeability of acrylic fibers. It was found that the dyeability of acrylic fibers were significantly improved under microwave irradiation caused by the increased adsorption of the dye into fibers due to the local over heating and an amplifi...
in the present study, theoretical chemical reactivates photo isomerization in cis-retinal as a natural photo switch in vision. dft hybrid functional, b3lyp and, post-hf method, were the theoretical methods applied utilizing g09 software. 6-31g+ (d,p) basis set employed for structural optimizations, and single point computations performed using b3lyp/6-31g+(d,p). the isomers cis molecule retinal...
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