نتایج جستجو برای: term duration
تعداد نتایج: 765448 فیلتر نتایج به سال:
We present a monolithic passively Q-switched microchip laser generating 200 ps pulses at a wavelength of 1064 nm with a repetition rate of up to 2 MHz. While maintaining transversal and longitudinal single-mode operation, the pulse energy can be changed from 130 nJ to 400 nJ by varying the pump conditions of the laser. To the best of our knowledge, the repetition rate of 2 MHz is by far the hig...
In this paper we show that every real-time system speciied in a certain subset of Duration Calculus 24] can be decomposed into an untimed system communicating with suitable timers. Both asynchronous and synchronous communication are considered.
The spin dynamics in Ni is studied by an exact diagonalization method on the ultrafast time scale. It is shown that the femtosecond relaxation of the magneto-optical response results from exchange interaction and spin-orbit coupling. Each of the two mechanisms affects the relaxation process differently. We find that the intrinsic spin dynamics occurs during about 10 fs while extrinsic effects s...
We present a complete axiomatisation of the operator of projection onto state in the Duration Calculus (DC ) relative to validity in DC without extending constructs. Projection onto state was introduced and studied extensively in our earlier works. We first establish the completeness of a system of axioms and proof rules for the operator relative to validity in the extension of DC by neighbourh...
Among the possible approaches for expressing real-time problems with the B method, two are dominant : the use of the usual B mechanisms to define temporal constraints on one hand, and extending B through another formalism more adapted to the real-time context. We define here a possible temporal semantic for B, by using a temporal logic (the duration calculus), and we illustrate how this extensi...
Introduction After birth, many infants were in hospital undergo repeated invasive procedures and because there is increasing evidence of short-term and long-term adverse neurodevelopment consequences, pain management in neonates is very important. Methods and Materials This was a quasi experimental study of clinical trial type that carried out on 80 term neonate that were allocated to two int...
Abstract Introduction: Survival after cardiac arrest is one of the most important issues related to the safety and quality of patient care, and unexpected events such as failure to follow guidelines can endanger the patient's safety. Objective: This study aimed to determine the long-term survival after cardiopulmonary resuscitation and its predictors in patients with cardiac arrest. Materi...
This study was conducted to assess the role of maternal oxygen administration during the second stage of labor on umbilical cord blood gas values. This study was done in Fatemieh hospital on 160 pregnant women who were admitted for vaginal delivery and had the inclusion criteria. A group ...
background: the effects of opium dependence on prognosis and short term outcome of patients with acute myocardial infarction (ami) are not clear yet. methods: from march 2004 to august 2004 all male patients admitted with diagnosis of ami were enrolled. patients who fulfilled dsm- iv-tr criteria were chosen as opium dependent patients (odp). demographic data, risk factors, peak enzyme levels, l...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید