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Cloud Data Center Selection Using a Modified Differential Evolution

Open Journal of Nephrology（肾脏病） 2024年第1期 48页

作者： Manal Abd El-salam Marwa Mohamed Anwar Rasha Mahmoud Gouda Naglaa Abou El Fattah Nadia Youssef Riad

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Computers, Materials & Continua 2021年第12期69卷 3179-3204页

作者： Yousef Sanjalawe Mohammed Anbar salam Al-E’mari Rosni Abdullah Iznan Hasbullah Mohammed Aladaileh National Advanced IPv6 Center(NAv6) Universiti Sains Malaysia11800 USMPenangMalaysia Computer Science Department PY CollageNorthern Border University(NBU)9280 NBUAr’arKingdom of Saudi Arabia

The interest in selecting an appropriate cloud data center is exponentially increasing due to the popularity and continuous growth of the cloud computing *** data center selection challenges are compounded by ever-increasing users’requests and the number of data centers required to execute these *** service broker policy defines cloud data center’s selection,which is a case of an NP-hard problem that needs a precise solution for an efficient and superior *** evolution algorithm is a metaheuristic algorithm characterized by its speed and robustness,and it is well suited for selecting an appropriate cloud data *** paper presents a modified differential evolution algorithm-based cloud service broker policy for the most appropriate data center selection in the cloud computing *** differential evolution algorithm is modified using the proposed new mutation technique ensuring enhanced performance and providing an appropriate selection of data *** proposed policy’s superiority in selecting the most suitable data center is evaluated using the CloudAnalyst *** results are compared with the state-of-arts cloud service broker policies.

关键词： Cloud computing data center data center selection cloud service broker differential evolution user request

N-Methylimidazolium perchlorate as a new ionic liquid for the synthesis of bis(pyrazol-5-ol)s under solvent-free conditions

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Chinese Chemical Letters 2016年第1期27卷 104-108页

作者： Nader Ghaffari Khaligh Sharifah Bee Abd Hamid salam J.J.Titinchi Nanotechnology & Catalysis Research Centre NANOCAT University Malaya Department of Chemistry University of the Western Cape

N-Methylimidazolium perchlorate（[MIm]ClO_4） was synthesized and some of its physico-chemical properties, such as density, surface tension were investigated. A thermo gravimetric analysis（TGA） and solvent performance were also studied. The results show that this ionic liquid is an excellent catalyst for the synthesis of 4,4＇-（arylmethylene）bis（1H-pyrazol-5-ol） derivatives under solvent-free *** method has the advantages of high yield, clean transformation, simple operation and short reaction time. The ionic liquid can be recycled without significant loss of activity.

关键词： Ionic liquid N-Methylimidazolium perchlorate Bis(pyrazol-5-ol)s Recycle

Bamboo biochar greater enhanced Cd/Zn accumulation in Salix psammophila under non-flooded soil compared with flooded

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Biochar 2022年第1期4卷 1072-1088页

作者： Xiaogang Li Yini Cao Jiang Xiao Mir Md Abdus salam Guangcai Chen Research Institute of Subtropical Forestry Chinese Academy of Forestry73Daqiao RdHangzhou 311400ZhejiangChina Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education School of EcologyEnvironment and ResourcesGuangdong University of TechnologyGuangzhou 510006China School of Forest Sciences University of Eastern FinlandYliopistokatu 7P.O.Box 11180100 JoensuuFinland Natural Resources Institute Finland(LUKE) Yliopistokatu 6B80100 JoensuuFinland

As a metal immobilizer,biochar can be used to remediate contaminated ***’s effect on the phytoremediation process in flooded conditions under a scenario of increasing flooding frequency as global climate change is not well *** study investigated bamboo biochar(BBC)effects on growth and metal accumulation of Salix in multi-metal contaminated soil under non-flooded versus flooded *** cuttings were cultivated in pots with severely contaminated soil by Cd and Zn,for 120 days,with four treatments including non-flooded treatment,flooded treatment,non-flooded with 3%BBC application(BBC/soil,w/w),and flooded with 3%BBC ***,flooding,and BBC×flooding significantly decreased the bioavailability of metals in soils(P<0.05).The BBC addition markedly stimulated Cd concentration in leaves under non-flooded(94.20%)and flooded conditions(32.73%)but showed little effect on *** BBC significantly boosted Cd and Zn transport from roots to aboveground parts by 68.85%and 102.27%compared with no BBC amendment under non-flooded treatment,while showing insignificant changes under flooded *** the plant biomass was little affected,BBC significantly increased Cd and Zn accumulation in the whole plant by 52.53%and 28.52%under non-flooded while showing an insignificant impact under flooded *** together,BBC enhanced the phytoremediation efficiency of Salix to Cd and Zn in severely polluted non-flooded soil,while flooding offset this *** results indicated the effects of BBC varied under different soil moisture,which should be considered in the biochar-assisted phytoremediation to variable and complex environments.

关键词： Heavy metals Amendment Salix Phytoremediation Soil flooding

Enhancement of oxygen reduction activity and stability via introducing acid-resistant refractory Mo and regulating the near-surface Pt content

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Journal of Energy Chemistry 2020年第12期29卷 246-252页

作者： Shouquan Feng Jiajia Lu Lin Luo Guangfu Qian Jinli Chen Hanna SAbbo salam JJTitinchi Shibin Yin College of Chemistry and Chemical Enginering.School of Physical Science and Technology.Key Laboratory of New Processing Technology for Nonferrous Metals and Materials State Key Laboratory of Processing for Non Ferrous Metal and Featured MaterialsGuangxi UniversityNanning 530004.GuangxiChina Department of Chemitry University of the Western Cape7535 Cape TownSouth Africa

Although Pt Ni catalyst possesses good oxygen reduction activity, its poor stability is the main obstacle for the commercialization of proton exchange membrane fuel cells(PEMFCs). In this work, we introduce the acid-resistant refractory Mo to enhance the structure stability and modify the electronic structure of Pt in the prepared PtNi catalyst, improving the catalytic activity for oxygen reduction reaction(ORR). In addition, near-surface Pt content in the nanoparticle is also optimized to balance the ORR activity and stability. The electrochemical results show that the alloy formed by Mo and Pt Ni is obviously more stable than the PtNi alloy alone, because the acid-resistant Mo and its oxides effectively prevent the dissolution of Pt. Especially, the Pt3 Ni3 MoN/C exhibits the optimal ORR catalytic performance in O2-saturated 0.1 mol L^(-1) HClO4 aqueous solutions, with mass activity(MA) of 900 m A mg^(-1) Pt at 0.90 V vs. RHE, which is 3.75 times enhancement compared with the commercial Pt/C(240 mA mg^(-1) Pt). After 30 k accelerated durability tests, its MA(690 m A mg^(-1) Pt) is still 2.88 times higher than the pristine Pt/C. This study thus provides a valuable method to design stable ORR catalysts with high efficiency and has great significance for the commercialization of PEMFCs.

关键词： Oxygen reduction reaction Surface platinum content regulate Ternary alloy catalyst Activity Stability

Investigation on available wind energy at Tungku beach

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Frontiers in Energy 2012年第3期6卷 275-279页

作者： M. G. YAZDANI M. A. salam Department of Mechanical Engineering Faculty of EngineeringInstitute Technology Brunei Brunei Darussalam Department of Electrical and Electronic Engineering Faculty of Engineering Institute Technology Brunei Brunei Darussalam

In this paper, wind velocities and directions （sea and land） are recorded in different days and times. The data collected were compared with the weather data from the Brunei Darussalam Meteorological Service （BDMS） and the findings of other researchers and were found to be in good agreement. The potential of wind energy is predicted from the available data collected. The average generated power （forenoon and afternoon） is found to be 25 （mean） and 18W （median）, 101 （mean） and 73W （median）, 912 （mean） and 660 W （median）, 10137 （mean） and 7331 W （median） for a rotor with a diameter of 2.5, 5, 15 and 50 m, respectively. The power density Pd for wind farming is found to be 0.26 （mean） and 0.19 （median）, 0.31 （mean） and 0.22 （median） for the rotor whose diameter is 2.5 and 50 m, respectively, while the average Pd values are found to be 0.28 （mean） and 0.2 （median） for the rotor whose diameter is 5 and 15 m.

关键词： wind velocity temperature tower height,power density Raleigh distribution electrical power

Impact of community-based interventions on HIV knowledge, attitudes, and transmission

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Infectious Diseases of Poverty 2014年第1期3卷 250-260页

作者： Rehana A salam Sarah Haroon Hashim H Ahmed Jai K Das Zulfiqar A Bhutta Division of Women and Child Health Aga Khan UniversityKarachiPakistan Center of Excellence in Women&Child Health The Aga Khan UniversityKarachiPakistan Center for Global Child Health Hospital for Sick Children TorontoCanada

In 2012,an estimated 35.3 million people lived with HIV,while approximately two million new HIV infections were ***-based interventions(CBIs)for the prevention and control of HIV allow increased access and ease availability of medical care to population at risk,or already infected with,*** paper evaluates the impact of CBIs on HIV knowledge,attitudes,and *** included 39 studies on educational activities,counseling sessions,home visits,mentoring,women’s groups,peer leadership,and street outreach activities in community settings that aimed to increase awareness on HIV/AIDS risk factors and ensure treatment *** review findings suggest that CBIs to increase HIV awareness and risk reduction are effective in improving knowledge,attitudes,and practice outcomes as evidenced by the increased knowledge scores for HIV/AIDS(SMD:0.66,95%CI:0.25,1.07),protected sexual encounters(RR:1.19,95%CI:1.13,1.25),condom use(SMD:0.96,95%CI:0.03,1.58),and decreased frequency of sexual intercourse(RR:0.76,95%CI:0.61,0.96).Analysis shows that CBIs did not have any significant impact on scores for self-efficacy and *** found very limited evidence on community-based management for HIV infected population and prevention of mother-to-child transmission(MTCT)for HIV-infected pregnant *** synthesis suggests that establishment of community support at the onset of HIV prevention programs leads to community acceptance and ***-based delivery of HIV prevention education and contraceptive distribution have also been advocated as potential strategies to target high-risk youth *** studies should focus on evaluating the effectiveness of community delivery platforms for prevention of MTCT,and various emerging models of care to improve morbidity and mortality outcomes.

关键词： Community-based interventions Antiretroviral therapy HIV prevention HIV/AIDS

Photocatalytic degradation of endocrine disruptor Bisphenol-A in the presence of prepared Ce_xZn_(1-x)O nanocomposites under irradiation of sunlight

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Journal of Environmental Sciences 2014年第11期26卷 2362-2368页

作者： Kamaraj M. Ranjith K.S. Rajeshwari Sivaraj Rajendra Kumar R.T. Hasna Abdul salam Department of Biotechnology Dr.N.G.P. Arts and Science College Coimbatore 641048 Tamil Nadu India Advanced Materials and Devices Laboratory Department of Physics Bharathiar University Coimbatore 641046 Tamil Nadu India Department of Biotechnology School of Life Sciences Karpagam University Coimbatore 641021 Tamil Nadu India

Photocatalytic degradation of Bisphenol A （BPA）, a representative endocrine disruptor chemical, was carried out under irradiation of sunlight in the presence of CexZn1-xO nanophotocatalyst. Cerium （Ce） ions were successfully incorporated into the bulk lattice of ZnO by simple co-precipitation process. The CexZn1-xO composite nanostructures exhibited higher photocatalytic efficiency than pure ZnO in the degradation of BPA under sunlight irradiation and nearly complete mineralization of BPA was achieved. The degradation rate was strongly dependent on factors such as the size and structure of catalyst, doping material concentration, BPA concentration, catalyst load, irradiation time and pH levels. This work suggested that the CexZn1-xO assisted photocatalytic degradation is a versatile, economic, environmentally benign and efficient method for BPA removal in the aqueous environment.

关键词： Bisphenol A (BPA) ZnO CexZn1-xO Sunlight Co-precipitation Cerium

Position and Velocity Time Delay for Suppression Vibrations of a Hybrid Rayleigh-Van der Pol-Duffing Oscillator

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Sound & Vibration 2020年第3期54卷 149-161页

作者： Y.A.Amer A.T.El-Sayed M.N.Abd El-salam Mathematics Department Science FacultyZagazig UniversityZagazigEgypt Basic Sciences Department Modern Academy for Engineering and TechnologyCairoEgypt Basic Sciences Department Higher Technological Institute10th of Ramadan CityEgypt

In this paper,we used time delay feedback to minimize the vibrations of a hybrid Rayleigh–van der Pol–Duffing *** system is a one-degree-offreedom containing the cubic and fifth nonlinear terms and an external *** applied the multiple scales method to get the solution from first *** and numerically,we studied the system before and after adding time delay feedback at the primary resonance case(ffi!).We used MATLAB program to simulate the efficacy of different parameters and the time delay on the main system.

关键词： Position time delay feedback velocity time delay feedback multiple scales method resonance cases

From ecophysiology to cultivation methodology:filling the knowledge gap between uncultured and cultured microbes

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Marine Life Science & Technology 2021年第2期3卷 132-147页

作者： Nimaichand salam Wen-Dong Xian Mipeshwaree Devi Asem Min Xiao Wen-Jun Li State Key Laboratory of Biocontrol Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Sciences and Engineering Guangdong Laboratory(Zhuhai)School of Life Science and School of EcologySun Yat-Sen UniversityGuangzhou510275China State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi830011China

Earth is dominated by a myriad of microbial communities,but the majority fails to grow under in situ laboratory *** basic cause of unculturability is that bacteria dominantly occur as biofilms in natural *** improvements in the culture techniques are mostly done by optimizing media ***,with technological advancement particularly in the field of genome sequencing and cell imagining techniques,new tools have become available to understand the ecophysiology of microbial ***,it becomes easier to mimic environmental conditions in the culture *** methods include co-culturing,emendation of growth factors,and cultivation after physical cell *** recently,techniques have been proposed for bacterial cultivation by employing genomic data to understand either microbial interactions(network-directed targeted bacterial isolation)or ecosystem engineering(reverse genomics).Hopefully,these techniques may be applied to almost all environmental samples,and help fill the gaps between the cultured and uncultured microbial communities.

关键词： Biofilms Ecophysiology Unculturability Co-occurrence network Reverse genomics