نتایج جستجو برای: impulse sensitivity function reduction

تعداد نتایج: 1942535  

In this paper, an intuitive analysis of a phase noise reduction technique is done, and then a modified structure is proposed to achieve higher phase noise reduction than the original one. This method reduces the impact of noise sources on the phase noise by decreasing closed-loop gain in zero-crossings points and moving this high closed-loop gain to the non-zero-crossings points. This reduction...

Journal: :iranian journal of nuclear medicine 2003
hossein rajabi bahareh shalchian nahid yaghoobi ahmad bitarafan rajabi fereidoon rastgoo

introduction: renal dynamic study is a well-established and popular test in routine practice of nuclear medicine. the test is non-invasive, rapid and unique in evaluation of the kidney function. in despite of its clinical values, the parameters derived from renogram are physiologically meaningless. that is due to the fact that renogram is not the true kidney function. from mathematical points o...

Journal: :اقتصاد و توسعه کشاورزی 0
کرباسی کرباسی کاتب کاتب

abstract in this research by using a synchronous equivalents system, the functions of supply and demand of any kind of meat and corn in fars province, iran are considered. the purpose of this study is to predict the functions of supply and the price of meat and corn, recognition and analysis of effective issued on supply and price of this sections, considering the effect of shocks and the cross...

Journal: :journal of research in medical sciences 0
babak amra victoria beigi borougeni mohammad golshan forogh soltaninejad

background: several studies have showed an increased prevalence of airflow obstruction in first degree relatives of individuals with chronic obstructive pulmonary disease (copd). considering no specific research had evaluated airway resistance in offspring of patients with severe copd, we utilized a spirometry and a impulse oscillometry (io) to evaluate this population. materials and methods: i...

2012
Kiel G. Ormerod Tatiana P. Rogasevskaia Jens R. Coorssen A. Joffre Mercier

The cholesterol chelating agent, methyl-β-cyclodextrin (MβCD), alters synaptic function in many systems. At crayfish neuromuscular junctions, MβCD is reported to reduce excitatory junctional potentials (EJPs) by impairing impulse propagation to synaptic terminals, and to have no postsynaptic effects. We examined the degree to which physiological effects of MβCD correlate with its ability to red...

Ahmad Bitarafan Rajabi Bahareh Shalchian Fereidoon Rastgoo Hossein Rajabi, Nahid Yaghoobi Seyed Hassan Firoozabadi

Introduction: Renal dynamic study is a well-established and popular test in routine practice of nuclear medicine. The test is non-invasive, rapid and unique in evaluation of the kidney function. In despite of its clinical values, the parameters derived from renogram are physiologically meaningless. That is due to the fact that renogram is not the true kidney function. From mathematical po...

2015
Constantine Saadeh Charles Saadeh Blake Cross Michael Gaylor Melissa Griffith

OBJECTIVES This retrospective study was a comparative analysis of sensitivity of impulse oscillometry and spirometry techniques for use in a mixed chronic obstructive pulmonary disease group for assessing disease severity and inhalation therapy. METHODS A total of 30 patients with mild-to-moderate chronic obstructive pulmonary disease were monitored by impulse oscillometry, followed by spirom...

Journal: :مجله علوم اعصاب شفای خاتم 0
malihe hassan nia islamic azad university, mashhad branch, mashhad, iran hossein mohebbi islamic azad university, mashhad branch, mashhad, iran nafise bahrami islamic azad university, mashhad branch, mashhad, iran zahra ghane islamic azad university, mashhad branch, mashhad, iran

zinc is a substance that regulates neural excitability by binding whit sodium channel and potassium channel. the efficiency of free zinc ion, make down the neural survival rate, reduced the peak amplitude of na+ and make depolarization na channel, increased the peak amplitude of transition outward k+ currents and delayed rectifier. also it is an effective blocker of one subtype of tetrodoxine (...

2003
Jason Stauth Anshi Liang

— This paper investigates the concept of using body bias as a design tool to optimize the timing jitter and power dissipation in single ended CMOS ring oscillators. A theoretical model for phase noise and timing jitter in ring oscillators is summarized and used as a basis for simulation of the impulse sensitivity function. Simulation results are then used to estimate timing jitter and phase noi...

2011
Hong Shi Sergey Shumarayev Weichi Ding Xiaohong Jiang Shufang Tian Aman Aflaki

Jitter behavior has become increasingly critical design considerations for 12Gbps and 28Gbps transceiver devices featuring stringent specification compliance. In this paper, we present a comprehensive study of noise to jitter transfer mechanism, in which two dominant yet distinct jitter causes, power supply noise and signal crosstalk are investigated by phase noise method. The analysis reveals ...

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