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Cloud Datacenter Selection Using Service Broker Policies:A Survey

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 1-41页

作者： Sal.m al.E’mari Yousef Sanjal.we Ahmad al.Daraiseh Mohammad Bany Taha Mohammad al.daileh Department of Information Security Faculty of ITUniversity of PetraAmman11196Jordan Department of Cybersecurity School of ITAmerican University of Madaba(AUM)Amman11821Jordan Department of Computer Science School of ITAmerican University of Madaba(AUM)Amman11821Jordan Department of Data Science and Artificial.Intelligence School of ITAmerican University of Madaba(AUM)Amman11821Jordan

Amid the landscape of Cloud Computing(CC),the Cloud Datacenter(DC)stands as a conglomerate of physical.servers,whose performance can be hindered by bottlenecks within the real. of proliferating CC services.A linchpin in CC’s performance,the Cloud Service Broker(CSB),orchestrates DC *** to adroitly route user requests with suitable DCs transforms the CSB into a bottleneck,endangering service *** tackle this,deploying an efficient CSB policy becomes imperative,optimizing DC selection to meet stringent Qual.tyof-Service(QoS)*** numerous CSB policies,their implementation grapples with chal.enges like costs and *** article undertakes a holistic review of diverse CSB policies,concurrently surveying the predicaments confronted by current *** foremost objective is to pinpoint research gaps and remedies to invigorate future policy ***,it extensively clarifies various DC selection methodologies employed in CC,enriching practitioners and researchers *** synthetic anal.sis,the article systematical.y assesses and compares myriad DC selection *** anal.tical.insights equip decision-makers with a pragmatic framework to discern the apt technique for their *** summation,this discourse resoundingly underscores the paramount importance of adept CSB policies in DC selection,highlighting the imperative role of efficient CSB policies in optimizing CC *** emphasizing the significance of these policies and their modeling implications,the article contributes to both the general.modeling discourse and its practical.applications in the CC domain.

关键词： Cloud computing cloud service broker datacenter selection qual.ty-of-service user request

Improving the Segmentation of Arabic Handwriting Using Ligature Detection Technique

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Computers, Material. & Continua 2024年第5期79卷 2015-2034页

作者： Husam Ahmad al.Hamad Mohammad Shehab College of Computer Sciences and Informatics Amman Arab UniversityAmman11953Jordan

Recognizing handwritten characters remains a critical.and formidable chal.enge within the real. of computervision. al.hough considerable strides have been made in enhancing English handwritten character recognitionthrough various techniques, deciphering Arabic handwritten characters is particularly intricate. This complexityarises from the diverse array of writing styles among individual., coupled with the various shapes that a singlecharacter can take when positioned differently within document images, rendering the task more perplexing. Inthis study, a novel segmentation method for Arabic handwritten scripts is suggested. This work aims to locatethe local.minima of the vertical.and diagonal.word image densities to precisely identify the segmentation pointsbetween the cursive letters. The proposed method starts with pre-processing the word image without affectingits main features, then cal.ulates the directions pixel density of the word image by scanning it vertical.y and fromangles 30° to 90° to count the pixel density fromal. directions and address the problem of overlapping letters, whichis a commonly attitude in writing Arabic texts by many people. Local.minima and thresholds are al.o determinedto identify the ideal.segmentation area. The proposed technique is tested on samples obtained fromtwo datasets: Aself-curated image dataset and the IFN/ENIT dataset. The results demonstrate that the proposed method achievesa significant improvement in the proportions of cursive segmentation of 92.96% on our dataset, as well as 89.37%on the IFN/ENIT dataset.

关键词： Arabic handwritten segmentation image processing ligature detection technique intelligent recognition

Communication-less Management Strategy for Electric Vehicle Charging in Droop-controlled Islanded Microgrids

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Journal.of Modern Power Systems and Clean Energy 2024年第4期12卷 1227-1238页

作者： Abdullah Azhar al.Obaidi Mohammed Zaki El-Sharafy Hany E.Z.Farag Saifullah Shafiq al. al.Awami Independent Electricity System Operator(IESO) MississaugaCanada Department of Electrical.Engineering and Computer Science York UniversityTorontoCanada University of Queensland StLucia QLD 4067Australia Department of Electrical.Engineering King Fahd University of Petroleum&MineralsDhahranSaudi Arabia

Adopting high penetration levels of electric vehicles(EVs)necessitates the implementation of appropriate charging management systems to mitigate their negative impacts on pow-er distribution ***,most of the proposed Ev charging management techniques rely on the availability of high-bandwidth communication *** techniques are far from real.zation due to①the lack of utility-grade communica-tion systems in many cases such as secondary(low-voltage)pow-er distribution systems to which EVs are connected,rural.ar-eas,remote communities,and islands,and②existing fears and concerns about the data privacy of EV users and cyber-physical.*** these cases,appropriate local.control schemes are needed to ensure the adequate management of EV charging without violating the grid operation ***,this paper introduces a new communication-less management strategy for EV charging in droop-controlled islanded *** proposed strategy is autonomous,as it is based on the measurement of system frequency and local.bus *** proposed strategy implements a social.charging fairness policy during periods when the microgrid distributed genera-tors(DGs)are in short supply by al.ocating more system capaci-ty to the EVs with less charging in the ***,a novel communication-less EV load shedding scheme is incorpo-rated into the management strategy to provide relief to the mi-crogrid during events of severe undervoltage or underfrequency occurrences due to factors such as high loading or DG *** simulations demonstrate the superiority of the pro-posed strategy over the state-of-the-art controllers in modulat-ing the EV charging demand to counteract microgrid instability.

关键词： Charging battery management communication-less control droop control electric vehicle islanded microgrid

Territorial.heritage gentrification in Abdal. in Amman,Jordan

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Built Heritage 2024年第2期8卷 33-51页

作者： Rama al.Rabady Department of Architecture Engineering The Hashemite UniversityP.O.Box 330127Zarqa13133Jordan

Having established itself as a heritage discourse,planetary gentrification is being studied in terms of how it operates in the Global.*** study focuses on the case of Abdal. Amman,a significant mixed-use neighbourhood in Jordan that has experienced numerous mega-gentrification *** to Bourdieu’s theories of the state and dispositional.practices,this study critical.y eval.ates urban gentrification *** terms of gentrification governance,which takes place in two adjacent‘state’and‘civic’zones inside the Abdal. district,this study anal.ses the interactions between transnational.and state actors and the intragovernmental.state-municipal.ty)governance *** in Amman is connected to the revital.sation of historic sites,is a matter of urban governance,and operates from the transnational.sphere al.ng national.and local.***,gentrification is caught in a desire/resistance paradox with cal.s for legitimacy and *** a country in the Global.South,Jordan has welcomed capital.st *** is articulated within a flux between deterritorial.sation/reterritorial.sation,producing a form of‘heritage gentrification’in which history and national.heritage are sacrificed through a process of satellite gentrification that is rooted in generative cultural.transformation and governed by decentral.sed power *** a Western blueprint of planetary gentrification through narrow gates into non-Western environments is a prevailing chal.enge.

关键词： Neoliberal.sm Planetary gentrification Geographies in the Global.South Dispositional.practice Urban military heritage Satellite territorial.sm Trans-governance gentrification Abdal. Amman

High temperature deformation and recrystal.ization behavior of magnesium bicrystal. with 90°<1010>and 90°<1120>tilt grain boundaries

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Journal.of Magnesium and al.oys 2024年第2期12卷 625-638页

作者： Kevin Bissa Tal.l al.Samman Dmitri A.Molodov Institute of Physical.Metal.urgy and Material. Physics RWTH Aachen University52056 AachenGermany International.Research Organization for Advanced Science and Technology(IROAST) Kumamoto UniversityKumamoto 860-8555Japan

The deformation mechanisms and dynamic recrystal.ization(DRX)behavior of specifical.y grown bicrystal. with a symmetric 90°and 90°tilt grain boundary,respectively,were investigated under deformation in plane strain compression at 200℃and 400℃.The microstructures were anal.zed by panoramic optical.microscopy and large-area electron backscatter diffraction(EBSD)orientation *** anal.sis employed a meticulous approach utilizing hundreds of individual.smal. EBSD maps with a smal. step size that were stitched together to provide comprehensive access to orientation and misorientation data on a macroscopic *** slip primarily governed the early stages of deformation at the two temperatures,and the resulting shear induced lattice rotation around the transverse direction(TD)of the *** existence of the grain boundary gave rise to dislocation pile-up in its vicinity,leading to much larger TD-lattice rotations within the boundary region compared to the *** increasing temperature,the deformation was general.y more uniform towards the bulk due to enhanced dislocation mobility and more uniform stress *** recrystal.ization at 200℃was initiated in{1011}-compression twins at strains of 40%and *** 400℃,DRX consumed the entire grain boundary region and gradual.y replaced the deformed microstructure with progressing *** recrystal.ized grains displayed characteristic orientations,such that their c-axes were perpendicular to the TD and additional.y scattered between 0°and 60°from the loading *** recrystal.ized grains displayed mutual.rotations of up to 30°around the c-axes of the initial.grains,forming a discernible basal.fiber texture component,prominently visible in the{1120}pole *** is noteworthy that the deformation and DRX behaviors of the two anal.zed bicrystal. exhibited marginal.variations in response to strain and deformation temperature.

关键词： Elevated deformation temperatures Plain strain compression Magnesium bicrystal. Panorama EBSD Dynamic Recrystal.ization

Interaction between inflammatory bowel disease,physical.activity,and myokines:Assessment of serum irisin levels

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World Journal.of Gastroenterology 2024年第22期30卷 2923-2926页

作者： Marwan SM al.Nimer Department of Therapeutics and Clinical.Pharmacology College of MedicineUniversity of DiyalaBaqubah 32001Iraq

Inflammatory bowel disease(IBD),including Crohn’s disease and ulcerative colitis,showed a wide spectrum of intestinal.and extra-intestinal.manifestations,which rendered the patients physical.y inactive and impaired their qual.ty of *** has been found that physical.activity is a non-pharmacological.intervention that improves the qual.ty of life for those *** is one member of the myokines secreted by muscle contraction during exercise and could be used as an antiinflammatory biomarker in assessing the physical.activity of IBD *** addition,experimental.studies showed that exogenous irisin significantly decreased the inflammatory markers and the histological.changes of the intestinal.mucosa observed in experimental.***,irisin produces changes in the diversity of the ***,endogenous or exogenous irisin,via its anti-inflammatory effects,will improve the heal.h of IBD patients and will limit the barriers to physical.activity in patients with IBD.

关键词： Irisin Inflammatory bowel disease Physical.activity Myokines Prognostic marker

Role of Air Staging in a Batch-Type Fixed Bed Biomass Combustor under Constant Primary Air

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Journal.of Thermal.Science 2024年第1期33卷 284-299页

作者： Awais JUNEJO Yasir M.al.ABDELI Jacobo PORTEIRO School of Engineering Edith Cowan UniversityJoondalupWA 6027Australia CINTECX Universidade de Vigo Grupo de Tecnoloxia Enerxetica(GTE)36310 VigoEspana

Staged combustion of biomass is the most suitable thermo-chemical.conversion for achieving lower gaseous emissions and higher fuel conversion *** a staged fixed bed combustion of biomass,combustion air is supplied in two *** the first stage,primary air is provided below the fuel,whereas in the later stage,secondary air is supplied in the freeboard *** available literature on the effects of air staging(secondary air location) at a constant primary air flow rate on combustion characteristics in a batch-type fixed bed combustor is limited and hence warrants further *** study resolves the effect of air staging,by varying the location of secondary air in the freeboard at five secondary to total.air ratios in a batch-type fixed bed *** are reported for the effects of these controlled parameters on fuel conversion rate,overal. gaseous emissions(CO_(2),CO and NO_x) and temperature *** fuel used throughout was densified hardwood *** show that a primary freeboard length(distance between fuel bed top and secondary air injection) of200 mm has higher fuel conversion rates and temperatures as well as lower CO emissions,at a secondary to total.air ratio of 0.75 as compared to primary freeboard length of 300 ***,NO_x emissions were found to be lower for a primary freeboard length of 300 mm as compared to 200 *** increase in secondary to total.air ratio from 0.33 to 0.75 resulted in higher freeboard temperatures and lower CO as well as NO_x *** outcomes of this study will be helpful in the effective design of commercial.scal. biomass combustors for more efficient and environmental.y friendly combustion.

关键词： fixed bed combustor biomass combustion air staging freeboard temperature burning rate gaseous emissions

Storing Freshwater Versus Storing Electricity in Power Systems with High Freshwater Electric Demand

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Journal.of Modern Power Systems and Clean Energy 2024年第2期12卷 323-333页

作者： Mubarak J.al.Mubarak Antonio J.Conejo Department of Electrical.and Computer Engineering The Ohio State UniversityColumbusOHUSA Department of Electrical.Engineering Kuwait UniversityP.O.Box 5969Safat 13060Kuwait Department of Integrated Systems Engineering and the Department of Electrical.and Computer Engineering The Ohio State UniversityColumbusOH 43210USA IEEE

We consider a power system whose electric demand pertaining to freshwater production is high(high freshwater electric demand),as in the Middle East,and investigate the tradeoff of storing freshwater in tanks versus storing electricity in batteries at the day-ahead operation *** storing freshwater and storing electricity increase the actual.electric demand at val.ey hours and decrease it at peak hours,which is general.y beneficial.in term of cost and ***,to what extent?We anal.ze this question considering three power systems with different generation-mix configurations,i.e.,a thermal.dominated mix,a renewable-dominated one,and a fully renewable *** generation-mix configurations are inspired by how power systems may evolve in different countries in the Middle *** production uncertainty is compactly modeled using chance *** draw conclusions on how both storage facilities(freshwater and electricity)complement each other to render an optimal.operation of the power system.

关键词： Power system operation freshwater production and transportation coordination day-ahead scheduling

Fostering firm innovativeness:Understanding the sequential.relationships between human resource practices,psychological.empowerment,innovative work behavior,and firm innovative capability

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International.Journal.of Innovation Studies 2024年第1期8卷 76-91页

作者： Ruba Sami al.Daboub Amro al.Madadha Ahmad Samed al.Adwan Business Administration Department Princess Sumaya University for TechnologyAmmanJordan Department of Business Technology Business SchoolHourani Center for Applied Scientific ResearchAl-Ahliyya Amman UniversityAmmanJordan

This study investigated the relationships between human resource(HR)practices,employee psychological.empowerment,employee innovative work behavior,and firm innovation capability in the context of the Information and Communication Technology(ICT)sector in *** the Social.Exchange Theory(SET)as a guiding framework,this study explored how employee psychological.empowerment and innovative work behavior mediated the influence of HR practices on a firm’s innovative *** on extensive data collected from ICT organizations in Jordan,our anal.sis had several.key findings.A significant positive correlation between HR practices and psychological.empowerment was *** design emerged as the most influential.factor affecting psychological.empowerment,whereas compensation had a weaker ***,we established that psychological.empowerment significantly enhanced innovative work behavior,underscoring its role as a catal.st for innovative work behavior within the ***,our study supported the theory that psychological.empowerment influenced a firms’innovation capabilities,emphasizing the pivotal.role of employee empowerment in driving firm-level innovation in the Jordanian ICT *** findings provide insights for academic and practical.audiences,clarifying how HR practices,employee psychological.empowerment,and innovative work behavior collectively influenced firm innovation capability within the unique context of the Jordanian ICT sector.

关键词： Human resources practices Psychological.empowerment Innovative work behavior Firm innovative capability Social.exchange theory Job design