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A Hybrid Model for Reliability Aware and Energy-Efficiency in Multicore Systems

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Computers, Materials & Continua 2022年第3期70卷 4447-4466页

作者： Samar nour Sameh A.Salem Shahira M.Habashy Department of Computer and Systems Engineering Faculty of EngineeringHelwan UniversityCairo11792Egypt Egyptian Computer Emergency Readiness Team(EG-CERT) National Telecom Regulatory Authority(NTRA)Cairo12577Egypt

Recently,Multicore systems use Dynamic Voltage/Frequency Scaling(DV/FS)technology to allow the cores to operate with various voltage and/or frequencies than other cores to save power and enhance the *** this paper,an effective and reliable hybridmodel to reduce the energy and makespan in multicore systems is *** proposed hybrid model enhances and integrates the greedy approach with dynamic programming to achieve optimal Voltage/Frequency(Vmin/F)***,the allocation process is applied based on the *** hybrid model consists of three *** first stage gets the optimum safe voltage while the second stage sets the level of energy efficiency,and finally,the third is the allocation *** results on various benchmarks show that the proposed model can generate optimal solutions to save energy while minimizing the makespan *** with other competitive algorithms show that the proposed model provides on average 48%improvements in energy-saving and achieves an 18%reduction in computation time while ensuring a high degree of system reliability.

关键词： Energy-efficiency safe voltage multicore processors core utilization dynamic voltage/frequency scaling makespan

A Flocking-Based on Demand Routing Protocol for Unmanned Aerial Vehicles

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Journal of Computer Science & Technology 2018年第2期33卷 263-276页

作者： nour El Houda Bahloul Saadi Boudjit Marwen Abdennebi Djallel Eddine Boubiche LaSTIC Laboratory University of Batna 2 Batna 05078 Algeria L2TI Laboratory University of Paris 13 Villetaneuse 93430 France

The interest shown by some community of researchers to autonomous drones or UAVs （unmanned aerial vehicles） has increased with the advent of wireless communication networks. These networks allow UAVs to cooperate more efficiently in an ad hoc manner in order to achieve specific tasks in specific environments. To do so, each drone navigates autonomously while staying connected with other nodes in its group via radio links. This connectivity can deliberately be maintained for a while constraining the mobility of the drones. This will be suitable for the drones involved in a given path of a given transmission between a source and a destination. This constraint could be removed at the end of the transmission process and the mobility of each concerned drone becomes again independent from the others. In this work, we proposed a flocking-based routing protocol for UAVs called BR-AODV. The protocol takes advantage of a well known ad hoc routing protocol for on-demand route computation, and the Boids of Reynolds mechanism for connectivity and route maintaining while data is being transmitted. Moreover, an automatic ground base stations discovery mechanism has been introduced for a proactive drones and ground networks association needed for the context of real-time applications. The performance of BR-AODV was evaluated and compared with that of classical AODV routing protocol and the results show that BR-AODV outperforms AODV in terms of delay, throughput and packet loss.

关键词： unmanned aerial vehicle (UAV) AODV Boids of Reynolds mobility control

Impact of the COVID-19 pandemic on healthcare workers’families

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World Journal of Clinical Cases 2022年第27期10卷 9964-9966页

作者： Mariana Helou nour El Osta Rola Husni Department of Emergency Medicine Lebanese American University school of MedicineBeirutLebanon Lebanese American University-Rizk Hospital BeirutLebanon Department of Emergency Lebanese American University School of MedicineBeirutLebanon Department of Infectious Diseases Lebanese American University School of MedicineBeirutLebanon

The coronavirus disease 2019 pandemic had a significant effect on the mental health,social lives,and family relationships of healthcare *** the pandemic,these workers had to prioritize their work over parenting,spending time with their kids or partners,planning weddings,and childbearing ***,special recognition should be given to the families of these employees.

关键词： Healthcare COVID-19 Relationship Pandemic Emergency Mental health

Investigation of the fluid flow in an isolated rotor-stator system with a peripheral opening

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Science China(Physics,Mechanics & Astronomy) 2013年第4期56卷 745-754页

作者： DEBUCHY Roger ABDEL nour Fadi NAJI Hassane BOIS Gérard Laboratoire Génie Civil & géo-Environnement (LGCgE- EA 4515) UArtois/FSA Béthune F-62400 Béthune France Université Lille Nord de France F-59000 Lille France Damascus University Department of Water Engineering Damascus Syria LML-PRES Lille Nord de France Arts et Métiers ParisTech Lille France

This paper deals with an experimental, theoretical and numerical study of a turbulent flow with separated boundary layers between a rotor and a stator. The system is not subjected to any superimposed radial flow. The periphery of the cavity is opened to the atmosphere so that the solid body rotation for infinite discs is not always observed. Emphasis was placed on develop- ment of an asymptotic approach and a step-by-step method to compute the radial distribution of the core swirl ratio and the static pressure on the stator side. The theory also includes the radial and axial velocities in the core region. The numerical simulation has been conducted with the commercial CFD code Fluent 6.1. The k- SST turbulence model is used, with the assumption of 2D-axisymmetric and steady flow. CFD validations have been performed by comparison of the numerical results with the corresponding theoretical results. Numerical and experimental results are in good agreement with analytical solutions.

关键词： rotor-stator cavity analytical solution numerical simulations k- SST turbulence model

Molecular typing of methicillin and vancomycin-resistant Staphylococcus aureus isolated from clinical specimens by double locus sequence typing(DLST)method

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BIOCELL 2020年第3期44卷 411-419页

作者： SOHEILA hasanIAN nour AMIRMOZAFARI AHMAD FARAJZADEH SHEIKH IRAJ MEHREGAN Department of Biology Science and Research BranchIslamic Azad UniversityTehranIran Department of Microbiology School of MedicineIran University of Medical SciencesTehranIran Department of Microbiology School of MedicineAhvaz Jundishapur University of Medical SciencesAhvazIran

Methicillin-resistant Staphylococcus aureus(MRSA)strains are the essential cause of infections in communities and *** present study was conducted to determine the molecular typing of MRSA,isolated from hospitalized patients,using the double-locus sequence typing(DLST).In total,280 *** isolated from clinical specimens by phenotypic(catalase,coagulase,DNase,oxacillin,vancomycin screening agar and antibiotic disk diffusion),and molecular methods(PCR for determining the mecA,vanA and nuc genes).The DLST and sequencing was performed for MRSA containing *** of 280 specimens,confirmed as Staphylococcus aureus(***),123(43.9%)strains were *** highest resistance toward the erythromycin(15μg),followed by ciprofloxacin(5μg),clindamycin(2μg),tetracycline(30μg),gentamicin(10μg)and rifampicin(5μg),was 98.3%,97.5%,94.3%,90.2%,83.7%and 41.4%,***,the least resistance(0%)was observed in each of teicoplanin(30μg),linzolide(30μg),and vancomycin(30μg).All(100%)of MRSA strains had the mecA,and none of them have had the *** results of DLST showed that the most common sequence types were BPH 2003 and *** DLST type 18-32 was a significant cluster of *** sequencing MRSA and comparing the dominant types via the DLST,it is possible to establish the etiology of the disease in a much shorter time,and prevent the complications of the ***,the combination of partial sequences of clfB and spa can serve as useful genetic markers for MRSA *** concluded that the MRSA in our region was relatively high,but no vancomycin resistance was *** majority of the MRSA DLST type was 18–32.

关键词： Antibiotic resistance DLST MRSA Staphylococcus aureus

Molecular cloning of virB12 gene of Brucella melitensis 16M strain in pET28a vector

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Asian Pacific Journal of Tropical Medicine 2012年第7期5卷 511-513页

作者： Shiva Mirkalantari nour Amirmozafari Bahram Kazemi Gholamreza Irajian Tehran University of Medical Sciences School of MedicineMicrobiology DepartmentTehranIran Shahid Beheshli University of Medical Sciences Department of BiotechnologyTehranIran

Objective:To clone the virB12 gene in pET28a expression vector for production of recombinant protein to be used as antigenic component for future serological test ***: Brucella melitensis(***) 16M strain was cultured and bacterial DNA was extracted by Bioneer AccuPrep~ Genomic DNA Extraction *** primer pair was designed based on Brucella virB12 gene sequence with BamHI and HindIII restriction site at 5’ end of the forward and reverse primers,*** amplification was performed using PrimSTAR~ HS DNA polymerase and the PCK product was purified by DNA AccuPrepGel Purification *** DNA was cloned into pJET1.2 cloning ***12 gene fragment was excised from pJET1.2 asing BamHI/HindIII and subsequendy subcloned into pET28a(+).Results:Brucella virB12 gene was successfully cloned in pJET1.2 and then in pET28a(+) *** and restriction enzyme digestion confirms the ***:We cloned and expressed the Brucella virB12 gene which could be used as antigenic component for specific serological assay development.

关键词： Brucella Cloning virB12 pET28a pJE1.2

The cellular microenvironment and cytoskeletal actin dynamics in liver fibrogenesis

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BIOCELL 2022年第9期46卷 2003-2007页

作者： nour HIJAZI DON C.ROCKEY ZENGDUN SHI Medical University of South Carolina Charleston29425USA

Hepatic stellate cells(HSCs)are the primary effector cells in liver *** the normal liver,HSCs serve as the primary vitamin A storage cells in the body and retain a“quiescent”***,after liver injury,they transdifferentiate to an“activated”myofibroblast-like phenotype,which is associated with dramatic upregulation of smooth muscle specific actin and extracellular matrix *** result is a fibrotic,stiff,and dysfunctional ***,understanding the molecular mechanisms that govern HSC function is essential for the development of anti-fibrotic *** actin cytoskeleton has emerged as a key component of the fibrogenic response in wound *** data indicate that the cytoskeleton receives signals from the cellular microenvironment and translates them to cellular function—in particular,increased type I collagen *** in nature,the actin cytoskeleton continuously polymerizes and depolymerizes in response to changes in the cellular *** this viewpoint,we discuss the recent developments underlying cytoskeletal actin dynamics in liver fibrosis,including how the cellular microenvironment affects HSC function and the molecular mechanisms that regulate the actininduced increase in collagen expression typical of activated HSCs.

关键词： Extracellular matrix Actin dynamics Transcriptional regulation Signaling

Enhancing IoT anomaly detection performance for federated learning

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Digital Communications and Networks 2022年第3期8卷 314-323页

作者： Brett Weinger Jinoh Kim Alex Sim Makiya Nakashima nour Moustafa K.John Wu Stony Brook University Stony BrookNYUSA Lawrence Berkeley National Laboratory BerkeleyCAUSA Texas A&M University CommerceTXUSA University of New South Wales CanberraAustralia

Federated Learning (FL) with mobile computing and the Internet of Things (IoT) is an effective cooperative learning approach. However, several technical challenges still need to be addressed. For instance, dividing the training process among several devices may impact the performance of Machine Learning (ML) algorithms, often significantly degrading prediction accuracy compared to centralized learning. One of the primary reasons for such performance degradation is that each device can access only a small fraction of data (that it generates), which limits the efficacy of the local ML model constructed on that device. The performance degradation could be exacerbated when the participating devices produce different classes of events, which is known as the class balance problem. Moreover, if the participating devices are of different types, each device may never observe the same types of events, which leads to the device heterogeneity problem. In this study, we investigate how data augmentation can be applied to address these challenges and improving detection performance in an anomaly detection task using IoT datasets. Our extensive experimental results with three publicly accessible IoT datasets show the performance improvement of up to 22.9% with the approach of data augmentation, compared to the baseline (without relying on data augmentation). In particular, stratified random sampling and uniform random sampling show the best improvement in detection performance with only a modest increase in computation time, whereas the data augmentation scheme using Generative Adversarial Networks is the most time-consuming with limited performance benefits.

关键词： Data augmentation Federated learning Internet of things Anomaly detection Machine learning

Remarkable Link between Projected Uncertainties of Arctic Sea-Ice Decline and Winter Eurasian Climate

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Advances in Atmospheric Sciences 2018年第1期35卷 38-51页

作者： Hoffman H.N.CHEUNG Noel KEENLYSIDE nour-Eddine OMRANI Wen ZHOU Geophysical Institute University of BergenBergen 5007Norway Bjerknes Centre for Climate Research University of BergenBergen 5007Norway Nansen Environmental and Remote Sensing Center Bergen 5006Norway Guy Carpenter Asia-Pacific Climate Impact Centre School of Energy and EnvironmentCity University of Hong KongHong KongChina City University of Hong Kong Shenzhen Research Institute Shenzhen 518057China

We identify that the projected uncertainty of the pan-Arctic sea-ice concentration(SIC) is strongly coupled with the Eurasian circulation in the boreal winter(December–March; DJFM), based on a singular value decomposition(SVD) analysis of the forced response of 11 CMIP5 models. In the models showing a stronger sea-ice decline, the Polar cell becomes weaker and there is an anomalous increase in the sea level pressure(SLP) along 60°N, including the Urals–Siberia region and the Iceland low region. There is an accompanying weakening of both the midlatitude westerly winds and the Ferrell cell,where the SVD signals are also related to anomalous sea surface temperature warming in the midlatitude North *** the Mediterranean region, the anomalous circulation response shows a decreasing SLP and increasing precipitation. The anomalous SLP responses over the Euro-Atlantic region project on to the negative North Atlantic Oscillation–like ***, pan-Arctic SIC decline could strongly impact the winter Eurasian climate, but we should be cautious about the causality of their linkage.

关键词： Arctic climate Siberian high Icelandic low three-cell meridional circulation