نتایج جستجو برای: dissipation factor

تعداد نتایج: 870006  

Journal: :Physical review letters 2008
J Walowski G Müller M Djordjevic M Münzenberg M Kläui C A F Vaz J A C Bland

We relate the energy dissipation processes at the femtosecond (electron-spin relaxation time tau el-sp) and nanosecond time scale (Gilbert relaxation taualpha) to the microscopic model proposed by Koopmans [Phys. Rev. Lett. 95, 267207 (2005)]. At both time scales, Elliot-Yafet scattering is proposed as the dominant contribution. We controllably manipulate the energy dissipation by transition me...

2003
T. Arslan

Power dissipation is becoming a limiting factor in the realization of VLSI systems. The principal reasons for this are maximum operating temperature and, for portable applications, battery life. Because of the relatively greater complexity, the power dissipation in digital signal processing (DSP) applications is of special significance, and low power design technique,'; are now emerging. This p...

2006
Y. B. Gao C. P. Sun

The fluctuation-dissipation relation is well known for the quantum open system with energy dissipation. In this paper a similar underlying relation is found between the bath fluctuation and the dephasing of the quantum open system, of which energy is conserved, but the information is leaking into the bath. To obtain this relation we revisit the universal, but simple dephasing model with quantum...

1997
S. Ramanathan V. Visvanathan

I n this paper, we first present a pipelined delayed least mean square (DLMS) adaptive filter architecture whose power dissipation meets a specified budget. This low-power architecture exploits the parallelism in the DLMS algorithm to meet the required computational throughput. The architecture exhibits a novel tradeoff between algorithmic performance and power dissipation. This architecture is...

2013
Stefan C. Mancas Haret C. Rosu

For the constant frequency case, we introduce a special type of Ermakov-Pinney equations with nonlinear dissipation based on the corresponding Chiellini integrable Abel equation. General solutions of these equations are obtained following the Abel equation route. Based on particular solutions, we also provide general solutions containing a factor with the phase of the Milne type. In addition, t...

2003
T. K. Saha P. Purkait

Deterioration of the underground power cables insulation has been established to be caused by electrical, thermal and environmental stresses. With the degradation of dielectric strength of the insulation, the underground cables will not be able to function optimally or as planned. As a supplement to the existing dissipation factor and other conventional cable diagnostic measurements, the Decay ...

2004
O Pfeiffer

The dynamic characteristics of a tip oscillating in the nc-AFM mode in close vicinity to a Cu(100)-surface are investigated by means of phase variation experiments in the constant amplitude mode. The change of the quality factor upon approaching the surface deduced from both frequency shift and excitation versus phase curves yield to consistent values. The optimum phase is found to be independe...

2001
Amir Levinson

The possibility that the peak of the spectral energy distribution (SED) of prompt GRB emission is produced on compact scales, prior to the acceleration of the fireball to its terminal Lorentz factor is considered. It is argued that if dissipation on these scales is associated with pair creation processes, then the observed clustering of SED peaks can be accounted for quite naturally by this mec...

Journal: :journal of petroleum science and technology 2014
maryam jouyandeh mehdi moayed mohseni fariborz rashidi

a theoretical solution is presented for the forced convection heat transfer of a viscoelastic fluid obeying the giesekus constitutive equation in a concentric annulus under steady state, laminar, and purely tangential flow. a relative rotational motion exists between the inner and the outer cylinders, which induces the flow. a constant temperature was set in both cylinders, in this study. the f...

2003
Nicolas A. F. Jaeger

Integrated-optic devices for use in high-voltage substations are reviewed. Specifically, two types of integrated-optic Mach-Zehnder and the integrated-optic Pockels cell are described and compared. A system for monitoring the condition offluid-and-paper insulation systems, such as are used in many current transformers and power transformer bushings, is also described. This condition monitoring ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید