نتایج جستجو برای: transmitter

تعداد نتایج: 18487  

Journal: :The Journal of the Institute of Television Engineers of Japan 1968

Journal: :Journal of Cell Biology 1970

Journal: :International Journal of Computer Applications 2014

2008

This editorial comments on recent evidence concerning the roles in depression of the transmitter amines 5-hydroxytryptamine (5HT), dopamine (DA) and noradrenaline (NA). It focuses on evidence from brain chemistry and from effects of drugs used in treatment. The literature on urinary excretion of amine metabolites and on platelet erythrocyte and neuroendocrine abnormalities will not be discussed...

Journal: :IEEE Journal on Selected Areas in Communications 1999
Ye Li Justin C.-I. Chuang Nelson Sollenberger

Transmitter diversity and down-link beamforming can be used in high-rate data wireless networks with orthogonal frequency division multiplexing (OFDM) for capacity improvement. In this paper, we compare the performance of delay, permutation and space–time coding transmitter diversity for high-rate packet data wireless networks using OFDM modulation. For these systems, relatively high block erro...

2008

This editorial comments on recent evidence concerning the roles in depression of the transmitter amines 5-hydroxytryptamine (5HT), dopamine (DA) and noradrenaline (NA). It focuses on evidence from brain chemistry and from effects of drugs used in treatment. The literature on urinary excretion of amine metabolites and on platelet erythrocyte and neuroendocrine abnormalities will not be discussed...

2014
Ravi Shukla Nashra Hashim Akhilesh Kumar Singh Yadav

there was a rapid development in wireless network area focusing on high speed and long range application. For this purpose Zigbee technology was developed. Zigbee based devices operates usually three bands i.e. 868 MHz, 915 MHz, and 2.4 GHz. This paper explore about several blocks of transmitter using VHDL. The transmitter consist of CRC(cyclic redundancy check), Bil-to-Symbol block, symbol-to-...

Journal: :Journal of physiology, Paris 1993
R S Zucker

The mechanism of transmitter release by intracellular Ca has been explored by recording presynaptic Ca concentration ([Ca2+]i) with Ca-sensitive fluorescent dyes and by controlling [Ca2+]i with photosensitive Ca chelators. [Ca2+]i decays slowly (in seconds) after presynaptic action potentials, while transmitter release lasts only a few ms after each spike at fast synapses. Simulations of Ca dif...

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