نتایج جستجو برای: اسیلاتور lc

تعداد نتایج: 29436  

Journal: :journal of operation and automation in power engineering 2007
m. mirzaie a. azizi tousi

one of the important factors influencing outdoor insulators performance is pollution phenomenon. the pollution, especially during humidity condition, reduces superficial resistance of insulator and lead to a flow of leakage currents (lc) on the insulator surface, which may result in total flashover. the lc characteristics are affected by parameters such as nature and severity of pollution. loca...

ژورنال: :اعتیاد پژوهی 0
حسین عزیزی hosin azizi medical sciences college of tarbiat modares [email protected] عاطفه هادیان atefeh hadian medical sciences college, tarbiat modares universityدانشگاه علوم پزشکی دانشگاه تربیت مدرس سعید سمنانیان saeed semnanian medical sciences college of tarbiat modares universityدانشکده علوم پزشکی دانشگاه تربیت مدرس

مقدمه: نوروپپتید اورکسین که از هسته های هیپوتالاموسی منشأ می گیرد در رفتار محرومیت از اپیوئید نقش دارد. هیپوتالاموس فیبرهای فراوان اورکسینرژیک را به هسته لوکوس سرولئوس lc ارسال می-کند. سندرم محرومیت از نظر زمانی با افزایش فعالیت نورون های هسته lc منطبق است. افزایش فعالیت القا شده به واسطه محرومیت در این نورون ها در محیط in vitro اتفاق نمی افتد. بنابراین ممکن است فاکتورهای خارجی سبب تشدید فعالیت...

Journal: :physiology and pharmacology 0
mojdeh navidhamidi tarbiat modares university mohammad javan tarbiat modares university yaghoub fatholahi tarbiat modares university saeed semnanian tarbiat modares university

introduction: the aim of this study was to assess the effect of ca2+/calmodulin-dependent kinase iiα (camkiiα) inhibitor (kn-93) injection into the locus coeruleus (lc) on the modulation of withdrawal signs. we also sought to study the effect of chronic morphine administration on camkiiα activity in the rat lc. methods: the research was based on behavioral and molecular studies. in the behavior...

1992
Albert E. Ruehli Hansruedi Heeb

A growing need exists for electrical interconnect analysis ( E I A ) fo r chips, packages and printed circuit boards. I n this short tutorial we review key issues regarding EIA for V L S I parasitic circuits. W e give a general introduction of important aspects for technologies with different performances and then we review some issues of concern fo r state of the art high performance chips and...

2002
Antônio Carlos M. de Queiroz

This paper generalizes the idea of “multiple resonance networks” to energy transfers between inductors and between capacitors and inductors, extending the theory about this class of LC lossless circuits. The networks discussed have the property of transferring all the energy initially stored in a particular capacitor or inductor in an LC network to another element in the network, through a line...

Proton exchange membrane fuel cells (PEMFCs) are electrochemical devices that show the highest power densities compared to the other type of fuel cell. In this work, nanocomposite membranes used for proton exchange membrane fuel cells as poly(vinyl alcohol)/La2Ce2O7 (PVA-LC) with the aim of increasing the water uptake and proton conductivity. Glutaraldehyde (GA) was used as cross linking agent ...

Journal: :medical journal of islamic republic of iran 0
s semnanlan from the department of physiology, shaheed beheshti university of medical sciences, tehran, islamicrepublic of iran. m dashti

bulbospinal noradrenergic pathways are shown to have an important role in descending inhibition of pain sensation. locus ceruleus (lc), as a rich noradrenergic nucleus in the brain stem which has projections into the dorsal horn of the spinal cord, was evaluated for antinociceptive activity by using tonic and phasic pain models in the rat. lc-lesioned rats demonstrated moderate increase in both...

Journal: :Chest 1995
Y Mizushima M Kobayashi

To define the clinical characteristics of multiple lung cancer (LC) associated with idiopathic pulmonary fibrosis (IPF), we reviewed 154 LC patients associated with IPF: 23 patients with synchronous multiple LC (IPF-multiple LC group) and 131 with single LC (IPF-single LC group), and these were compared with 4,931 patients with LC from 1975 to 1977 in Japan (whole LC group). In the IPF-single a...

2014
Paola Arias Ariel Arza Babette Döbrich Jorge Gamboa Fernando Méndez

We point out that a cold dark matter condensate made of gauge bosons from an extra hidden U(1) sector dubbed hiddenphotons can create a small, oscillating electric density current. Thus, they could also be searched for in the recently proposed LC-circuit setup conceived for axion cold dark matter search by Sikivie, Sullivan and Tanner. We estimate the sensitivity of this setup for hidden-photon...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2001
A L Curtis N T Bello R J Valentino

Endogenous opioids target noradrenergic locus ceruleus (LC) neurons and potently inhibit LC activity. Nonetheless, it has been difficult to demonstrate functional regulation of the LC-noradrenergic system by endogenous opioids because of the lack of effect of opiate antagonists. The present findings provide evidence that endogenous opioids regulate LC neuronal activity during the termination of...

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