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Error resilient concurrent video streaming over wireless mesh networks

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journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第5期7卷 684-695页

作者： CHUAH Chen-nee YOO ben S.j. Electrical and Computer Engineering Department University of California Davis 95616 USA Electrical and Computer Engineering Department

In this paper, we propose a multi-source multi-path video streaming system for supporting high quality concurrent video-on-demand (VoD) services over wireless mesh networks (WMNs), and leverage forward error correction to enhance the error resilience of the system. By taking wireless interference into consideration, we present a more realistic networking model to capture the characteristics of WMNs and then design a route selection scheme using a joint rate/interference-distortion optimiza- tion framework to help the system optimally select concurrent streaming paths. We mathematically formulate such a route selec- tion problem, and solve it heuristically using genetic algorithm. Simulation results demonstrate the effectiveness of our proposed scheme.

关键词： Wireless mesh network, Concurrent video streaming, Interference

Stability Analysis and Performance Evaluation of Additive Mixed-Precision Runge-Kutta Methods

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Communications on Applied Mathematics and Computation 2024年第1期6卷 705-738页

作者： ben Burnett Sigal Gottlieb Zachary j.Grant Center for Scientific Computing and Data Science Research UMass DartmouthNorth DartmouthMassachusettsUSA CSME Michigan State UniversityEast LansingMichiganUSA

Additive Runge-Kutta methods designed for preserving highly accurate solutions in mixed-precision computation were previously proposed and *** specially designed methods use reduced precision for the implicit computations and full precision for the explicit *** this work,we analyze the stability properties of these methods and their sensitivity to the low-precision rounding errors,and demonstrate their performance in terms of accuracy and *** develop codes in FORTRAN and julia to solve nonlinear systems of ODEs and PDEs using the mixed-precision additive Runge-Kutta(MP-ARK)*** convergence,accuracy,and runtime of these methods are *** show that for a given level of accuracy,suitably chosen MP-ARK methods may provide significant reductions in runtime.

关键词： Mixed precision Runge-Kutta methods Additive methods Accuracy

Taxonomy of the lesser jerboa jaculus jaculus (Dipodidae,Rodentia) based on allozymic and morphological variation

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Current Zoology 2010年第4期56卷 421-431页

作者： Abderraouf ben FALEH Abdelwaheb ben OthMEN Khaled SAID Génétique Biodiversité et Valorisation des Bio-ressources (UR03ES09) Institut Supérieur de Biotechnologie de Monastir 5000 Génétique Biodiversité Valorisation des Bio-ressources (UR03ES09) Institut Supérieur de Biotechnologie de Monastir 5000

the lesser Egyptian jerboa jaculus jaculus, is a member of the subfamily Dipodinae, known to have a number of subspecies. Previous studies of j. jaculus from North Africa found various morphological forms of unknown taxonomic status, which are frequently grouped into two taxa： j. jaculus and j. deserti. We assessed the taxonomic status of this taxon in Tunisia using allozymic （phylogenetic analysis of 23 genetic loci encoding 16 enzymatic proteins） and morphological （multivariate analysis of 13 craniodental characters） analyses of 136 j. jaculus specimens collected from seven localities within its distribution range. Allozymic analysis clearly indicated the existence of two distinct groups of j. jaculus, with a mean genetic distance （D） value of 0.99 and FΩ=0.52. Individuals within the two groups did not show any obvious geographical structuration, even within the Matmata locality which represents the meeting point for the two groups where they were found in sympatry. Additionally, morphometric analysis of 13 craniodental characters was clearly separated the two groups. these results were obtained over a very restricted area of the total distribution of j. jaculus and strongly suggest the occurrence of two separate and often sympatric species within the currently accepted *** in Tunisia： *** and j. deserti

关键词： Dipodidae jaculus jaculus Taxonomy Allozyme Morphomotric analysis Tunisia

Experimental study of the effects of a transversal air-flow deflector in electronics air-cooling

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journal of thermal Science 2011年第1期20卷 76-81页

作者： M.REBAY A.ARFAOUI j.PADET R.ben MAAD Université de Reims GRESPI/lab.de ThermomécaniqueFaculté des sciencesBP 103951687 ReimsFrance Laboratoire d'Energétique et Transferts thermique et Massique Faculté des sciences2092 Manar IITunisia

this paper presents an experimental investigation of the influence of a transversal flow deflector on the cooling of a heated block mounted on a flat *** deflector is inclined and therefore it guides the air flow to the upper surface of the *** configuration is simulating the air-cooling of a rectangular integrated circuit or a current converter mounted on an electronic *** electronic component is assumed dissipating low heat power,as such,air forced convection is still a sufficient cooling way even without fan or heat sink on the *** measurements are given by hot and cold wires anemometers and by an InfraRed *** results give details of the effects of the deflection on the hydrodynamic and the thermal fields on and over the block for different inclination *** show that the deviation caused by the deflector may significantly enhance the heat transfer from the *** is also able to avoid local overheating of the electronic *** heat transfer rate and homogenised temperature are shown to be obtained with an inclination angle =30°.

关键词： Electronic cooling infrared imaging hot wire anemometer upward facing step backward facing step

Zircon U-Pb dating and geochemical study of the Xianggou granite in the Ma'anqiao gold deposit and its relationship with gold mineralization

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Science China Earth Sciences 2010年第2期53卷 220-240页

作者： LEE ben State Key Laboratory of Continental Dynamics Department of GeologyNorthwest University

Single zircon LA-ICP-MS U-Pb dating and lithogeochemical studies have been performed on the Xianggou monzonitic granitic porphyry outcropped in the Ma’anqiao gold deposit.A weighted average U-Pb age of 242.0±0.8 Ma for Xianggou monzonitic porphyry has been *** corresponds with the conclusions of previous studies indicating a syn-orogenic age (242±21 Ma) of the Qinling Orogenic Belt,suggesting that the formation of the Xianggou granite should be associated with the collisional event of the North China Plate and the Yangtze Plate in the Indosinian *** Xianggou granite is characterized by the high silicon and alkali of high K calc-alkaline series *** is rich in Al (Al2O3=14.49%-15.61%) and Sr (457.10-630.82 ppm),poor in Y (the Xianggou granite can be classified as C-type adakitic *** initial Sr isotope ratios for the Xianggou granite vary from 0.70642 to 0.70668,εNd(t) values from -4.54 to -3.98,and TDM values from 1152 Ma to 1220 *** low εNd(t) and ISr and high TDM values,as well as Na2O/K2O ratios of the Xianggou granite are close to 1 (Na2O/K2O=0.95-1.10),indicating that it is not an I-type adakite formed by partial melting of the subducting oceanic crust,nor adakitic rock formed by melting of the underplated basaltic lower crust,but the product of partial melting of the nonunderplated basaltic thickened lower *** from the Xianggou pluton have a homogeneous Hf isotopic composition with negative εHf(t) values (between -9.7 and -5.9,with an average of -6.9),indicating that the rock-forming materials were mostly extracted from the ancient crust,not from the depleted *** Xianggou monzonitic granitic porphyry is rich in LILE and LREE and depleted in HSFE,HREE and Y;the composition of trace element and REE are similar to those

关键词： zircon U-Pb dating Xianggou monzonitic granitic porphyry Carlin type and Carlin-like type gold deposits petrologenic and metallogenic dynamic background

Cysteine proteases as therapeutic targets:does selectivity matter? A systematic review of calpain and cathepsin inhibitors

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Acta Pharmaceutica Sinica B 2015年第6期5卷 506-519页

作者： Marton Siklos Manel ben Aissa Gregory R.j.thatcher Department of Medicinal Chemistry and Pharmacognosy University of Illinois College of Pharmacy

Cysteine proteases continue to provide validated targets for treatment of human *** neurodegenerative disorders,multiple cysteine proteases provide targets for enzyme inhibitors,notably caspases,calpains,and *** reactive,active-site cysteine provides specificity for many inhibitor designs over other families of proteases,such as aspartate and serine;however,a)inhibitor strategies often use covalent enzyme modification,and b)obtaining selectivity within families of cysteine proteases and their isozymes is *** review provides a general update on strategies for cysteine protease inhibitor design and a focus on cathepsin B and calpain 1 as drug targets for neurodegenerative disorders;the latter focus providing an interesting query for the contemporary assumptions that irreversible,covalent protein modification and low selectivity are anathema to therapeutic safety and efficacy.

关键词： Cysteine protease Calpain Cathepsin Enzyme inhibitors Neurodegeneration Alzheimer’s disease

Regulation of HMGB1 release by infl ammasomes

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Protein & Cell 2013年第3期4卷 163-167页

作者： ben Lu Haichao Wang Ulf Andersson Kevin j.Tracey Laboratory of Biomedical Science Feinstein Institute for Medical Research350 Community DriveManhassetNY 11030USA the Elmezzi Graduate School of Molecular Medicine North Shore-LIJ Health system350 Community DriveManhassetNY 11030USA Department of Emergency Medicine North Shore University HospitalManhassetNY 11030USA Department of Women’s and Children’s Health Karolinska InstitutetS-17677 StockholmSweden

High mobility group box 1(HMGB1)is an evolutionarily conserved non-histone chromatin-binding *** infection or injury,activated immune cells and damaged cells release HMGB1 into the extracellular space,where HMGB1 functions as a proinflammatory mediator and contributes importantly to the pathogenesis of inflammatory *** studies reveal that infl ammasomes,intracellular protein complexes,critically regulate HMGB1 release from activated immune cells in response to a variety of exogenous and endogenous danger *** stranded RNA dependent kinase(PKR),an intracellular danger-sensing molecule,physically interacts with inflammasome components and is important for infl ammasome activation and HMGB1 ***,these studies not only unravel novel mechanisms of HMGB1 release during infl ammation,but also provide potential therapeutic targets to treat HMGB1-related infl ammatory diseases.

关键词： HMGB1 infl ammasome PKR

Inductively coupled plasma emission spectroscopic and flame photometric analysis of goat epididymal fluid

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Asian journal of Andrology 2000年第4期2卷 288-292页

作者： Meenakshi Gaur Vikas Pruthi Ramasare Prasad ben M.j.Pereira Reproductive Biology Laboratory Dept. of Bioscience and Biotechnology University of Roorkee Roorkee-247 667 U. P. IndiaReproductive Biology Laboratory Dept. of Bioscience and Biotechnology University of Roorkee Roorkee-247 667 U. P. IndiaReproductive Biology Laboratory Dept. of Bioscience and Biotechnology University of Roorkee Roorkee-247 667 U. P. IndiaReproductive Biology Laboratory Dept. of Bioscience and Biotechnology University of Roorkee Roorkee-247 667 U. P. India

Aim: the elemental composition of the epididymal luminal fluid (ELF) in adult goat ( Capra indica) was investigat-ed. Methods: ELF was collected by micropuncture from twelve sites along the epididymal duct. the elementalcontents was analyzed with inductively coupled plasma (ICP) emission spectroscopy, a microanalytical technique thatcan simultaneously measure many elements in minute volumes of sample. the Na and K concentrations were determinedby flame photometry. Results: ICP spectroscopy showed the presence of copper, calcium, nickel, iron, magne-sium, chromium, titanium and zinc in ELF, with fluctuating levels at different sites along the length of the ***, cobalt, lead and manganese were not fotmd. the Na^+ / K^+ ratio was seen to be higher at the initial seg-ments of the epididymis and lower at the distal. Conclusion: It is proposed that the observed characteristic distribu-tion of elements in ELF may have far reaching implications in sperm maturation and storage known to occur in the epi-didymis. (Asian j Androl 2000 Dec; 2: 288-292)

关键词： goat epididymis epididymal luminal fluid elements spectroscopy flame photometry

Semi-global leader-following consensus-based formation flight of unmanned aerial vehicles

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Chinese journal of Aeronautics 2022年第1期35卷 31-43页

作者： Panpan ZHOU ben M.CHEN Department of Mechanical ami Automation Engineering The Chinese University of Hong KongHong KongChina

In this paper,we investigate a formation control problem of multi-agent systems(specifically a group of unmanned aerial vehicles)based on a semi-global leader-following consensus approach with both the leader and the followers subject to input *** the low gain feedback design technique,a distributed static control protocol and a distributed adaptive control protocol are *** former solves the problem under an assumption that the communication network is undirected,and it depends on the global information of the *** the latter,we relax the undirected graph to directed ***,an adaptive updating gain is designed to avoid using the global information of the communication *** is shown that the consensus protocols can solve the semi-global leader-following consensus problem if the leader agent is globally *** results are verified successfully by both simulation and real flight tests.

关键词： Consensus Formation flying Input saturation Low gain feedback Multi-agent systems Unmanned aerial vehicles