نتایج جستجو برای: their capability to transmit signal over long distance without any additional amplifiers

تعداد نتایج: 11342387  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان 1388

abstract recent studies suggest that prelistening activities play an important role in the development of listening comprehension (e.g. long 1990;chiang and dunkel 1992; schmidt-rinehart 1994; jensen and hansen 1995; robinson et al., 1995; buck, 1995; foster and skehan,1996; teng 1996; robinson, 2001; chang and read 2006). in line with previous studies and to shed light on a new aspect of sche...

2016
Besim Limani

Telecommunication networks now days require high speed and transmission capacity. Such a trend is present in Kosovo too. The overall backbone transmission technology in Kosovo is based on fiber optic. To reach this requirement it is necessary to develop and use optical networks which are based on advanced optical technologies, such as WDM/DWDM transmitting technology and different amplifiers. H...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده ادبیات و علوم انسانی 1390

this study intends to investigate samuel beckett’s waiting for godot and endgame under the lacanian psychoanalysis. it begins by explaining the most important concepts of lacanian psychoanalysis. the beckettian characters are studied regarding their state of unconscious, and not the state of consciousness as is common in most beckett studies. according to lacan, language plays the sole role in ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی 1390

this study attempted to explore if teaching english collocations through two different modes of awareness-raising and input flooding has any possible differential effect on immediate retention as well as retention in a delayed assessment. it also compared the possible differential effect of teaching english collocations implicitly and explicitly on actively using the items in writing. m...

2005
MALCOLM HAWKSFORD

Continuousand discrete-time switching audio power amplifiers are studied both with and without feedback. Pulse-width modulation (PWM) and sigma–delta modulation (SDM) amplifier configurations are simulated and their interrelationship is described using linear phase modulation (LPM) and linear frequency modulation (LFM). Distortion generation encountered when applying negative feedback to PWM is...

2002
M. O'Droma N. Mgebrishvili A. Goacher

Linearity and power efficiency in transmit front ends are conflicting requirements demanding innovative solutions for present and future wireless mobile systems. The demand is greater in energy constrained mobile units, especially as signal bandwidths increase and other unit parts require a greater share of the available energy. This paper briefly reviews modern linearising techniques for the h...

2002
Kevin M. K. H. LEONG Ryan Y. MIYAMOTO Tatsuo ITOH

I. Introduction When receiving a signal from an unspecified direction, retrodirective arrays [1] are able to transmit a signal response to that same direction without any previous knowledge of the source direction. This function is performed automatically, without the use of phase-shifters or digital circuitry. The capability to perform high gain antenna pointing automatically, makes the retrod...

پایان نامه :دانشگاه رازی - کرمانشاه - دانشکده ادبیات و علوم انسانی 1393

in recent years, there has been a growing interest among researchers to investigate the relationship betweenteacher self-efficacy and classroom behavior management, especially students misbehavior. therefore, this study aimed to comparatively investigate english and arabic teachers’ use of different behavior managementstrategies, their self-efficacy, and their success in an iranian context. th...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1390

any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده ادبیات و زبانهای خارجی 1390

monumental changes occurring on a daily basis have altered the world into a global village of expanding technology and shrinking geography in which preparing language learners for intercultural communication seems to be a sine qua non for modern language education. employing a cross-sectional design in its first phase, this study investigated the intercultural sensitivity and language proficien...

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