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About 2,710 papers for “Gilbert model”

gilbert-elliot-model

Pieper, Jaden · Zenodo (CERN European Organization for Nuclear Research) · 2022

Initial release of gilbert-elliot model python package.

Cited by 0Open access

Erdős–Rényi–Gilbert Model

Alan Frieze, Michał Karoński · Cambridge University Press eBooks · 2023

A summary is not available for this content so a preview has been provided. Please use the Get access link above for information on how to access this content.

Cited by 0

Valuing the Gilbert Model

John Harrington Cox, Blake Frank, Nanette Philibert · Performance Improvement Quarterly · 2006

Leaders such as Thomas Gilbert, Geary Rummier, and Edward Deming have argued that the greatest leverage for solving performance problems lies with solutions targeted at system or environmental factors (those under the control of management) versus individual performer factors. A 12-item research instrument titled Achieving Productive Performance (APP) was developed based on the six variables that make up Gilbert's human performance model. MBA candidates whoworkfull-time primarily in middle management positions were asked to make value judgments on strategies for producing productive performance (where value for the performance exceeds the costs), Results support the concept of leverage espoused by Gilbert, Rummier, and Deming. Implications for workplace learning and performance professionals are discussed.

Cited by 15

Modeling Discrete Channels Based on Gilbert Model using MATLAB Software

Temurbek Rakhimov, Ismailov Shavkat Kuzievich, Matyokubov Utkir Karimovich et al. · International Journal of Engineering and Advanced Technology · 2019

Examining the state of discrete channels requires the study of the physical and mathematical characteristics of these channels. The Gilbert model allows for the determination of the channel state for detecting and correcting errors mainly in discrete channels. In the Gilbert model, the channel can be in two cases. It is a good case that there are no errors, and in the worst case, an error with px is likely to occur. The need for error-free channels for discrete channels, as well as the use of discrete channels for data transmission, as well as the use of Virtual programs for error detection and correction. The article deals with the use of Gilbert's model to detect and correct errors in discrete channels, and to combat noise in providing reliability and resilience of information. In addition, Gilbert's model is based on the modeling of the discrete channels using the MATLAB software and the removal of detected errors by a virtual model.

Cited by 2Open access

'Standard' CGE Model from Chapter 27 of Gilbert and Tower (2013)

John Gilbert, Edward Tower · Psychiatry Research · 2012

The Attention Network Test (ANT) provides measures for three different components of visual attention: executive control (=conflict inhibition), orienting, and alerting. There is reasonable evidence that alterations of attention-mainly in the executive/conflict domain-are associated with susceptibility to psychiatric illness. Specific impairments may be a characteristic for a medical condition such as schizophrenia and thus shift our understanding from a neuropsychological endophenotype to a more precise genetic understanding of this disorder. Study subjects comprised 35 schizophrenic patients and 35 healthy controls (13 female and 22 male in both groups). The ANT was administered to all participants and rated individual responses for the three factors (alerting, orienting, and conflict) and their respective ratios relative to mean reaction times. With regard to gender differences, group comparisons were performed for schizophrenic patients vs. healthy controls. Significant differences between patients and controls could be detected for mean reaction time (639 vs. 538 ms) and for conflict ratio (0.158 vs. 0.191). The latter difference mainly resulted from gender-specific variances of the conflict network in opposite directions. The executive function as represented by the conflict network of visual attention of the ANT is affected in schizophrenia. We have detected hitherto unreported gender-specific differences between healthy controls and schizophrenic patients. Especially as regards the conflict network, the ANT offers a promising methodology to detect a neuropsychological endophenotype of schizophrenia.

Cited by 0

Non-local Gilbert damping tensor within the torque-torque correlation model

Thonig, Danny, Kvashnin, Yaroslav, Eriksson, Olle et al. · arXiv (Cornell University) · 2017

An essential property of magnetic devices is the relaxation rate in magnetic switching which depends strongly on the damping in the magnetisation dynamics. It was recently measured that damping depends on the magnetic texture and, consequently, is a non-local quantity. The damping enters the Landau-Lifshitz-Gilbert equation as the phenomenological Gilbert damping parameter $α$, that does not, in a straight forward formulation, account for non-locality. Efforts were spent recently to obtain Gilbert damping from first principles for magnons of wave vector $\mathbf{q}$. However, to the best of our knowledge, there is no report about real space non-local Gilbert damping $α_{ij}$. Here, a torque-torque correlation model based on a tight binding approach is applied to the bulk elemental itinerant magnets and it predicts significant off-site Gilbert damping contributions, that could be also negative. Supported by atomistic magnetisation dynamics simulations we reveal the importance of the non-local Gilbert damping in atomistic magnetisation dynamics. This study gives a deeper understanding of the dynamics of the magnetic moments and dissipation processes in real magnetic materials. Ways of manipulating non-local damping are explored, either by temperature, material's doping or strain.

Cited by 0Open access

Link quality estimation with the Gilbert-Elliot model for wireless sensor networks

Ana Bildea, Olivier Alphand, Franck Rousseau et al. · HAL (Le Centre pour la Communication Scientifique Directe) · 2015

In this paper, we apply the Gilbert-Elliot model to analyze measurements on a large-scale wireless sensor testbed with nodes equipped with CC1101 and CC2420 radio chips. The model considers a packet loss process as a sequence of transitions between Good and Bad states. We analyze the Packet Reception Ratio (PRR) based on the probabilities derived from the Gilbert-Elliot model. We show that the probabilities and other parameters (run and loss lengths) can very well discriminate between the main categories of link quality such as good and weak links. Identification of link quality is crucial for routing protocols such as RPL and LOADng.

Cited by 34Open access

Gilbert damping in conducting ferromagnets. II. Model tests of the torque-correlation formula

Ion Garate, A. H. MacDonald · Physical Review B · 2009

We report on a study of Gilbert damping due to particle-hole pair excitations in conducting ferromagnets. We focus on a toy two-band model and on a four-band spherical model which provide an approximate description of ferromagnetic (Ga,Mn)As. These models are sufficiently simple that disorder-ladder-sum vertex corrections to the long-wavelength spin-spin response function can be summed to all orders. An important objective of this study is to assess the reliability of practical approximate expressions which can be combined with electronic structure calculations to estimate Gilbert damping in more complex systems.

Cited by 49Open access

Dynamics of Multi-Spin Systems : Landau-Lifshitz-Gilbert Model and ferromagnetic pattern formation

Jung, Soyoung, Berrondo, Dr. Manuel · ScholarsArchive (Brigham Young University) · 2014

Modeling has been an important part of many fields of research. Even though it sometimes could be considered to be non-practical, it has sharpened the questions and has been a useful tool for experimental research to understand what is being observed in the laboratory. Likewise, the Heisenberg model constitutes an essential stepping stone to understand anti/ferromagnetism in magnetic materials. We have been able to develop a spin model using Landau-Lifshitz-Gilbert equation enhanced with anisotropy and long range interaction that is comparable to experimental results.

Cited by 0

Breathing Fermi surface model for noncollinear magnetization: A generalization of the Gilbert equation

M. Fähnle, Daniel Steiauf · Physical Review B · 2006

The breathing Fermi surface model which has been developed to describe the dissipative magnetization dynamics of collinear magnetization configurations is generalized to the case of noncollinear configurations. The theory is valid for small relative cantings of the atomic magnetic moments, and it is based on a phenomenological expansion of the ab initio density functional electron theory in atomic-sphere approximation for the spin direction. An equation of motion is obtained which looks like a Gilbert equation, with the important difference that Gilbert's damping constant is replaced by a damping matrix ${\underset{͇}{\ensuremath{\alpha}}}_{\mathbf{R}}({{\mathbf{M}}_{\mathbf{R}}})$ which in general is different for the different atomic sites $\mathbf{R}$ and which depends on the momentary magnetization configuration ${{\mathbf{M}}_{\mathbf{R}}}$ of the whole system, i.e., it is a strongly nonlocal equation.

Cited by 46

Gilbert Damping in Conducting Ferromagnets II: Model Tests of the Torque-Correlation Formula

Garate, Ion, MacDonald, Allan · arXiv (Cornell University) · 2008

We report on a study of Gilbert damping due to particle-hole pair excitations in conducting ferromagnets. We focus on a toy two-band model and on a four-band spherical model which provides an approximate description of ferromagnetic (Ga,Mn)As. These models are sufficiently simple that disorder-ladder-sum vertex corrections to the long-wavelength spin-spin response function can be summed to all orders. An important objective of this study is to assess the reliability of practical approximate expressions which can be combined with electronic structure calculations to estimate Gilbert damping in more complex systems.

Cited by 0Open access

A Gilbert-Elliot Bit Error Model and the Efficient Use in Packet Level Simulation

Jean-pierre Ebert, Andreas Willig, Dr. -ing Adam Wolisz et al. · 1999

When investigating complex communication protocols and a large number of stations using discrete event simulation, it is of great interest to keep the number of necessary simulation events low, since this number directly translates into simulation runtime. One important target for optimizations is the packet or frame exchange over an underlying transmission medium. The number of simulation events involved in transmitting packets should be as low as possible. On the other hand, it is often of great importance to accurately model the channel characteristics and the exact error process. A prominent example are wireless channels. Unfortunately packet errors are very difficult to model, since they depend on channel and source characteristics (e.g. coding). Often the results of erroneous bits differ with the position of the bit hit by an error. Thus it may be necessary to simulate packet transmission on a bit level to derive the packet error process. Simulation at bit level requires at least...

Cited by 0