Papers in Physics最新文献_第6页

Self-sustained oscillations with delayed velocity feedback 具有延迟速度反馈的自激振荡

IF 0.9

Papers in Physics Pub Date : 2017-03-30 DOI: 10.4279/PIP.090003

D. Zanette

引用次数: 7

An alternative derivation of the Dirac operator generating intrinsic Lagrangian local gauge invariance 产生固有拉格朗日局部规范不变性的狄拉克算子的另一种推导

IF 0.9

Papers in Physics Pub Date : 2017-01-14 DOI: 10.4279/PIP.090002

B. Wolk

引用次数: 11

Influence of bottleneck lengths and position on simulated pedestrian egress 瓶颈长度和位置对模拟行人出口的影响

IF 0.9

Papers in Physics Pub Date : 2017-01-13 DOI: 10.4279/PIP.090001

D. Parisi, G. Patterson

{"title":"Influence of bottleneck lengths and position on simulated pedestrian egress","authors":"D. Parisi, G. Patterson","doi":"10.4279/PIP.090001","DOIUrl":"https://doi.org/10.4279/PIP.090001","url":null,"abstract":"In this paper, the problem of pedestrian egress under different geometries is studied by means of two numerical models. The length of the bottleneck after the exit and the distance of the exit to the lateral wall of a squared room are investigated. Both models show that an increase in the bottleneck length increases the evacuation time by more than 20 %, for any exit position. Hence, a bottleneck length tending to zero is the best choice. On the contrary, the results of moving the exit closer to the lateral wall are different in both models and, thus, its convenience cannot be stated. To unveil whether this layout modification is favorable, experimental data are required. Moreover, the discrepancy between models indicates that they should be validated considering several scenarios. Received: 25 August 2016, Accepted: 3 January 2017; Edited by: G. C. Barker; Reviewed by: A. Seyfried, Institute for Advanced Simulation Julich Supercomputing Centre, Germany; DOI: http://dx.doi.org/10.4279/PIP.090001 Cite as: D R Parisi, G A Patterson, Papers in Physics 9, 090001 (2017) This paper, by D R Parisi, G A Patterson , is licensed under the Creative Commons Attribution License 3.0 .","PeriodicalId":19791,"journal":{"name":"Papers in Physics","volume":"9 1","pages":"090001-090001"},"PeriodicalIF":0.9,"publicationDate":"2017-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48703521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

An efficient impurity-solver for the dynamical mean field theory algorithm 动态平均场理论算法的高效杂质求解器

IF 0.9

Papers in Physics Pub Date : 2017-01-08 DOI: 10.4279/PIP.090005

Y. N. Fernández, K. Hallberg

{"title":"An efficient impurity-solver for the dynamical mean field theory algorithm","authors":"Y. N. Fernández, K. Hallberg","doi":"10.4279/PIP.090005","DOIUrl":"https://doi.org/10.4279/PIP.090005","url":null,"abstract":"One of the most reliable and widely used methods to calculate electronic structure of strongly correlated models is the Dynamical Mean Field Theory (DMFT) developed over two decades ago. It is a non-perturbative algorithm which, in its simplest version, takes into account strong local interactions by mapping the original lattice model on to a single impurity model. This model has to be solved using some many-body technique. Several methods have been used, the most reliable and promising of which is the Density Matrix Renormalization technique. In this paper, we present an optimized implementation of this method based on using the star geometry and correction-vector algorithms to solve the related impurity Hamiltonian and obtain dynamical properties on the real frequency axis. We show results for the half-filled and doped one-band Hubbard models on a square lattice. Received: 31 March 2017, Accepted: 6 June 2017; Edited by: D. Dominguez; Reviewed by: A. Feiguin, Northeastern University, Boston, United States; DOI: http://dx.doi.org/10.4279/PIP.090005 Cite as: Y Nunez Fernandez, K Hallberg, Papers in Physics 9, 090005 (2017) This paper, by Y Nunez Fernandez, K Hallberg , is licensed under the Creative Commons Attribution License 3.0 .","PeriodicalId":19791,"journal":{"name":"Papers in Physics","volume":"9 1","pages":"090005-090005"},"PeriodicalIF":0.9,"publicationDate":"2017-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47226031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Knife-bladed vortices in non-Newtonian fluids 非牛顿流体中的刃状涡

IF 0.9

Papers in Physics Pub Date : 2016-11-24 DOI: 10.4279/PIP.080007

É. Freyssingeas, Damien Frelat, Y. Dossmann, J. Géminard

引用次数: 0

Invited review: Fluctuation-induced transport. From the very small to the very large scales 特邀评审:波动引起的运输。从很小的尺度到很大的尺度

IF 0.9

Papers in Physics Pub Date : 2016-09-04 DOI: 10.4279/PIP.080004

G. Suárez, M. Hoyuelos, D. Chialvo

{"title":"Invited review: Fluctuation-induced transport. From the very small to the very large scales","authors":"G. Suárez, M. Hoyuelos, D. Chialvo","doi":"10.4279/PIP.080004","DOIUrl":"https://doi.org/10.4279/PIP.080004","url":null,"abstract":"The study of fluctuation-induced transport is concerned with the directed motion of particles on a substrate when subjected to a fluctuating external field. Work over the last two decades provides now precise clues on how the average transport depends on three fundamental aspects: the shape of the substrate, the correlations of the fluctuations and the mass, geometry, interaction and density of the particles. These three aspects, reviewed here, acquire additional relevance because the same notions apply to a bewildering variety of problems at very different scales, from the small nano or micro-scale, where thermal fluctuations effects dominate, up to very large scales including ubiquitous cooperative phenomena in granular materials. Received: 30 October 2015, Accepted: 4 February 2016; Edited by: G. Martinez Mekler; Reviewed by: J. Mateos, Departamento de Sistemas Complejos, Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Mexico.; DOI: http://dx.doi.org/10.4279/PIP.080004 Cite as: G P Suarez, M Hoyuelos, D R Chialvo, Papers in Physics 8, 080004 (2016) This paper, by G P Suarez, M Hoyuelos, D R Chialvo , is licensed under the Creative Commons Attribution License 3.0 .","PeriodicalId":19791,"journal":{"name":"Papers in Physics","volume":"8 1","pages":"080004-080004"},"PeriodicalIF":0.9,"publicationDate":"2016-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71010892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Increasing granular flow rate with obstructions 有障碍物时颗粒流速增大

IF 0.9

Papers in Physics Pub Date : 2016-03-28 DOI: 10.4279/PIP.080003

Alan T. Murray, F. Alonso-marroquin

引用次数: 6

Piezoelectric energy harvesting from colored fat-tailed fluctuations: An electronic analogy 从彩色厚尾波动中收集压电能量:一个电子类比

IF 0.9

Papers in Physics Pub Date : 2015-09-30 DOI: 10.4279/PIP.070014

J. I. P. Rossell'o, R. Deza, J. Ignacio Deza, H. Wio

引用次数: 1

The role of master regulators in gene regulatory networks 基因调控网络中主调控者的角色

IF 0.9

Papers in Physics Pub Date : 2015-07-14 DOI: 10.4279/PIP.070011

E. Hern'andez-Lemus, K. Baca-L'opez, R. Lemus, R. Garc'ia-Herrera

{"title":"The role of master regulators in gene regulatory networks","authors":"E. Hern'andez-Lemus, K. Baca-L'opez, R. Lemus, R. Garc'ia-Herrera","doi":"10.4279/PIP.070011","DOIUrl":"https://doi.org/10.4279/PIP.070011","url":null,"abstract":"Gene regulatory networks present a wide variety of dynamical responses to intrinsic and extrinsic perturbations. Arguably, one of the most important of such coordinated responses is the one of amplification cascades, in which activation of a few key-responsive transcription factors (termed master regulators, MRs) lead to a large series of transcriptional activation events. This is so since master regulators are transcription factors controlling the expression of other transcription factor molecules and so on. MRs hold a central position related to transcriptional dynamics and control of gene regulatory networks and are often involved in complex feedback and feedforward loops inducing non-trivial dynamics. Recent studies have pointed out to the myocyte enhancing factor 2C (MEF2C, also known as MADS box transcription enhancer factor 2, polypeptide C) as being one of such master regulators involved in the pathogenesis of primary breast cancer. In this work, we perform an integrative genomic analysis of the transcriptional regulation activity of MEF2C and its target genes to evaluate to what extent are these molecules inducing collective responses leading to gene expression deregulation and carcinogenesis. We also analyzed a number of induced dynamic responses, in particular those associated with transcriptional bursts, and nonlinear cascading to evaluate the influence they may have in malignant phenotypes and cancer. Received: 20 Novembre 2014, Accepted: 24 June 2015; Edited by: C. A. Condat, G. J. Sibona; DOI: http://dx.doi.org/10.4279/PIP.070011 Cite as: E Hernandez-Lemus, K Baca-Lopez, R Lemus, R Garcia-Herrera, Papers in Physics 7, 070011 (2015) This paper, by E Hernandez-Lemus, K Baca-Lopez, R Lemus, R Garcia-Herrera , is licensed under the Creative Commons Attribution License 3.0 .","PeriodicalId":19791,"journal":{"name":"Papers in Physics","volume":"7 1","pages":"070011-070011"},"PeriodicalIF":0.9,"publicationDate":"2015-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71011057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Reaction rate in an evanescent random walkers system 随逝随机行走系统的反应速率

IF 0.9

Papers in Physics Pub Date : 2015-07-04 DOI: 10.4279/PIP.070003

M. R'e, N. Bustos

引用次数: 3