نتایج جستجو برای: q frame

تعداد نتایج: 221432  

Journal: :Physical review 2021

We investigate the transition form factors $f_+(q^2)$ and $f_-(q^2)$ [or $f_0(q^2)$] for exclusive semileptonic $B\to D\ell\nu_\ell$ $(\ell=e, \mu,\tau)$ decays in standard light-front quark model (LFQM) based on LF quantization. The common belief is that while can be obtained without involving any treacherous contributions such as zero mode instantaneous contribution, receives those since it i...

1995
Scott Chapman Pierre Scotto

Using two specific models and a model-independent formalism, we show that in addition to the usual quadratic “side”, “out” and “longitudinal” terms, a previously neglected “out-longitudinal” cross term arises naturally in the exponent of the two-particle correlator. Since its effects can be easily observed, such a term should be included in any experimental fits to correlation data. We also sug...

2014
Kavala Kiran Kumar R. Govardhana Rao

Active power filter continues to be a powerful tool to control harmonics in power systems thereby enhancing the power quality. This paper presents a fuzzy tuned PID controller based shunt active filter to diminish the harmonics caused by non linear loads like thyristor bridge rectifiers and imbalanced loads. Here Fuzzy controller provides the tuning of PID, based on firing of thyristor bridge r...

1999
Jozsef Vass Shelley Zhuang Jia Yao Xinhua Zhuang

| A novel middleware-based system providing e ective and e cient video access for mobile users communicating over low bandwidth error-prone wireless links is proposed. The middleware, implemented as mobile proxy server located at the mobile support station, is chosen for the seamless integration of mobile users and video servers by hiding the speci c details of the underlying system. For e cien...

1997
Fabrizio Caccavale Ciro Natale Bruno Siciliano Luigi Villani

1. I n t r o d u c t i o n One of the most reliable strategies to manage the interaction of the end effector of a robot manipulator with a compliant environment is impedance control [1]. The major i ty of interaction control schemes refer to three-degree-of-freedom (dof) tasks in that they handle end-effector position and contact linear force. On the other hand, in order to perform six-dof task...

1999
Changhao Jin

It was proposed [1] recently to use the decay distribution in terms of the observable ξu = (q 0 + |q|)/MB in the B rest frame to measure Vub, where q is the momentum transfer to the lepton pair. This decay spectrum is unique in that the tree-level and virtual gluon processes b → ulν at the parton level generate a trivial ξu spectrum — a discrete line at ξu = mb/MB, solely on kinematic grounds. ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم دریایی 1392

چکیده ندارد.

Journal: :Physical review 2022

We study the correspondence that connects space of solutions General Relativity (GR) with Ricci-based Gravity theories (RBGs) $f(R,Q)$ type in metric-affine formulation, where $Q=R_{(\mu\nu)}R^{(\mu\nu)}$. focus on case scalar matter and show when one considers a free massless GR frame, important simplifications arise allow to establish for arbitrary Lagrangian. particularize analysis quadratic...

2006
R Keith Ellis

One of the advantages of giving the closing talk at a conference with only plenary sessions, is that a summary is certainly superfluous. I shall take full advantage of that freedom in my talk and present only a few topics. In the infinite momentum frame (IMF) a proton or nucleus is seen as a Lorentz contracted disk, and xg(x, Q 2) is the number of gluons per unit rapidity of transverse size les...

2005
J. H. Field

The force due to electromagnetic induction on a test charge is calculated in different reference frames. The Faraday-Lenz Law and different formulae for the fields of a uniformly moving charge are used. The classical Heaviside formula for the electric field of a moving charge predicts that the inductive force vanishes in the frame in which the magnet is in motion and the test charge at rest. In...

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