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Energy Efficient Scheduler of Aperiodic Jobs for Real-time Embedded Systems

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International Journal of Automation and computing 2020年第5期17卷 733-743页

作者： Hussein el Ghor el-hadi Maggoune University Institute of Technology Lebanese UniversityLebanon Sensor Networks and Cellular Systems(SNCS)Research Center UTSaudi Arabia electrical Engineering Department University of Tabuk Sensor Networks and Cellular Systems(SNCS)Research Center 71491 TabukSaudi Arabia

Energy consumption has become a key metric for evaluating how good an embedded system is,alongside more performance metrics like respecting operation deadlines and speed of *** improvement is no longer the only metric by which optimality is *** fact,energy efficiency is becoming a preferred choice with a fundamental objective to optimize the system's *** this work,we propose an optimal energy efficient scheduling algorithm for aperiodic real-time jobs to reduce CPU energy ***,we apply the concept of real-time process scheduling to a dynamic voltage and frequency scaling(DVFS)*** address a variant of earliest deadline first(EDF)scheduling algorithm called energy saving-dynamic voltage and frequency scaling(ES-DVFS)algorithm that is suited to unpredictable future energy production and irregular job *** prove that ES-DVFS cannot attain a total value greater than C/ˆSα,whereˆS is the minimum speed of any job and C is the available energy *** also investigate the implications of having in advance,information about the largest job size and the minimum speed used for the competitive factor of *** show that such advance knowledge makes possible the design of semi-on-line algorithm,ES-DVFS∗∗,that achieved a constant competitive factor of 0.5 which is proved as an optimal competitive *** experimental study demonstrates that substantial energy savings and highest percentage of feasible job sets can be obtained through our solution that combines EDF and DVFS optimally under the given aperiodic jobs and energy models.

关键词： Real-time systems energy efficiency aperiodic jobs scheduling dynamic voltage scaling low-power systems embedded systems

Influence of Silica Fume on Corrosion Behaviour of Reinforced Steel in Different Media

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Journal of Materials Science & Technology 2002年第1期18卷 83-88页

作者： Z.A.el-hadi I.Z.Selim 等 DepartmentofChemistry UniversityCollegeforGirlsAinShamsUniversityEgypt PhysicalChemistryDepartment NationalResearchCenterCairoEgypt

The electrochemical and corrosion behaviours of reinforced steel embedded in cement pastes incorporating different amounts of silica fume as a partial replacement of cement have been studied in chloride and sulphate solutions by using different electrochemical techniques. The results indicate that, while the passivity degree of the steel is low in the control sample upon soaking in the corrosive media, it is high in the sample incorporating silica fume and increases with the increase of silica fume content. The improvement effect of silica fume may be attributed to the pore solution structure of cement paste, which limits the mobility of aggressive ions near the surface of the steel. The mechanism of steel corrosion due to chloride and sulphate attack and the passivation effect of silica fume are discussed.

关键词： Corrosion Reinforced steel Cement pastes Silica fume Aggressive ions

Effect of Pb Ions on the Ionic Conductivity of Some Silicate Glass Systems

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Journal of Materials Science & Technology 2002年第5期18卷 391-394页

作者： A.G.Mostafa Z.A.el-hadi 等 PhysicsDepartment FacultyofScienceAl-AzharUniversityNasrCityCairoEgypt ChemistryDepartment UniversityCollegeforGirlsAinShamsUniversityCairoEgypt

Conductivity of glasses in the systems ***, (where R=Ca, Sr or Ba) was investigated between room temperature and 530 K. The dependence of log resistivity as well as the activation energy on the PbO content has been studied. Based on the present experimental results, the possible different conduction mechanisms in such glasses are discussed. It was postulated that Pb2+ ions may represent the major charge carrying species in these glasses. This assumption was confirmed by the calculations of the mean distance between the interstitial Pb2+ ions and the effective center of the O2- ions in the glass networks. The variation in the values of the density and the molar volume with PbO content is also discussed in view of the obtained activation energies for the studied glass-systems.

关键词： Ionic conductivity Pb ion Silicate glass systems

Sedimentologic Study of Miocene Outcrops-Ouenza in Algero-Tunisian Frontiers

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地学前缘 2009年第S1期16卷 201-202页

作者： Mazouz el hadi Hamimed Messaoud University of Tebessa ALGERIA

The results of the granulometrical and sequential analysis supported by micropaleontological dating using the foraminifera as well as chemico-ponderous and X-ray diffraction analysis,confirmed the contemporaneity of the Burdigalian outcrops of the two studied zones(Ain Sidi Salah zone in the northeast and Fedj el Behim zone in the southwest), both located at the north of the city of Ouenza in

关键词： sedimentology sequence analysis foraminifera Burdigalian Ouenza

Dielectric Properties of Some Borate Glasses

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Journal of Materials Science & Technology 2001年第2期17卷 278-282页

作者： Z.A.el-hadi Chemistry Department, College For Girls, Ain-Shams University, Heliopolis, Cairo, Egypt Dept. of Chem. Coll. for Girls Ainshams Univ. Cairo Egypt

The dielectric constant, e', and the dielectric loss. e', for some selected lead borate glasses within the frequency band 105 to 107 Hz and the temperature range (20-50)'C were measured. The dielectric dispersion and the dielectric loss absorption bands were observed. the relaxation time, the activation enthalpy and entropy change of the dielectric relaxation were calculated. The results obtained were discussed and correlated to the internal network structure of the glasses studied.

关键词： rate Dielectric Properties of Some Borate Glasses

Human epidermal growth factor receptor-2 in oesophageal cancers:An observational study

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World Journal of Gastroenterology 2012年第44期18卷 6447-6451页

作者： Hazem Al-Momani Rachel Barnes Ahmed el-hadi Rachit Shah Wyn G Lewis Paul Edwards Department of Surgery Nevill Hall HospitalAbergavenny NP7 7EGWalesUnited Kingdom Department of Surgery University Hospital of WalesCardiff CF14 4XWUnited Kingdom

AIM:To determine the incidence of human epidermal growth factor receptor 2(HER2) over expression in oesophageal ***:A retrospective study,of one hundred consecutive cases of endoscopic histological samples of oesophageal cancers from a single British cancer network were *** cases were diagnosed between April 2007 and June ***2 over expression was assessed using immunohistochemistry,those that scored "0" and "+1" were considered "negative" for HER2;those that scored "+3" were considered "Positive".Cases that were scored "+2" on immunohistochemistry further went on to have HER2 gene analysis using the Ventana HER brightfield dual-colourin situ hybridisations(HER B DISH) assay and either came back to be positive or negative for HER2 over *** survival was measured from date of histological diagnosis until date of death.93% of the cases were followed up till five years or death,and all were followed up till two *** of gastro-oesophageal junctional tumours were ***:The median age of our sample was 66 years(range:38-91 years).Eighty one were male and 19 ***-one of the cases were adenocarcinoma of the oesophagus and the rest were cases of squamous cell *** anatomical distribution of the tumours was;upper oesophagus 2,middle oesophagus 11,and 87 were in the lower *** resection was completed in 15 cases;seven cases had attempted surgical resections,i.e.,open and close,33 patients received definitive chemo-radiation and 52 had palliative ***-five of the cancers showed evidence of HER2 over expression,all were *** the 25 cases that showed evidence of HER2 over expression,21(84%) were located in the lower third of the *** staging,24 out of the 25 HER2 positive cases were at stage 3 or more(13 at stage 3 and 11 at stage 4),For HER2 negative cases 37 were at stage 3 and 32 were staged as stage *** out of twenty five cases(68%) with HER

关键词：表皮生长因子受体癌症患者食管免疫组织化学过度表达肿瘤患者手术切除常规检测

Hygrothermal/UV Aging Effect on Visual Aspect and Mechanical Properties of Non-Woven Natural-Fiber Composites

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Journal of Renewable Materials 2019年第9期7卷 866-876页

作者： Daniel Scida Sébastien Alix Stéphane Buet el hadi Saidane François Courmont Karim Behlouli Rezak Ayad Universitéde Reims Champagne Ardenne LISM EA469551097 ReimsFrance EcoTechnilin SAS ZA Caux Multipôles 76190 ValliquervilleArrondissement de RouenFrance

This work aims at studying the effect of hygrothermal and UV cyclic aging on the tensile properties and esthetic characteristics of non-woven *** composite materials were thermo-compressed from non-woven mats made up of PP and flax or kenaf *** works included evaluating the change in color appearance and analyzing the variations in tensile properties and damage mechanisms,depending on the aging *** presence of the UV protection film on the composite surface showed its effectiveness against *** visual observations and measurement of colorimetric parameters,it has been proved effective in the reduction of the bleaching and yellowing of the *** regards the tensile tests,the UV protection film enabled to stabilize the Young’s modulus after 1-week aging for Kenaf/PP and after 3-weeks for Flax/*** 4-weeks aging,it halved the number of acoustic emission events related to interfacial decohesion and fiber slippage/pull out for Flax/PP and Kenaf/PP composites.

关键词： Aging colorimetry mechanical properties natural fibers non-woven

The Effect of Annealing Treatments on Spherulitic Morphology and Physical Ageing on Glass Transition of Poly Lactic Acid (PLLA)

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Materials Sciences and Applications 2011年第5期2卷 439-443页

作者： el-hadi Ahmed Mohamed 不详

Spherulitic morphology of pure poly lactic acid (PLLA) PLLA have investigated after thermal annealing. The morphology of spherulite of pure poly lactic acid (PLLA) PLLA have investigated after thermal annealing. The effect of both annealing temperature and crystallization temperature on the formation of cracks was described by polarized optical microscope (POM). Non banded spherulite (fibrils) with cracks was detected in PLLA film after annealing at 160°C (180 min.) and isothermal crystallization temperatures at 140°C and 150°C. With increasing temperature after annealing treatment the size of spherulite is increased and more cracks are formed. The maximum growth rate of spherulites was found at 130°C. The physical ageing was carried out by annealing the PLLA sample at room temperature for several annealing time (ta) from 0 h to 720 h. The enthalpy relaxation has been studied by differential scanning calorimetry (DSC) through analysis of the endothermic peak of glass transition temperature, which increased and shifted towards higher temperature as the annealing time increased.

关键词： Poly Lactic Acid (PLLA) Morphology Non-Banded Spherulites Annealing Polarized Optical Microscopy Physical Ageing

Differential expression of cell cycle regulators in HCV-infection and related hepatocellular carcinoma

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World Journal of Hepatology 2010年第1期2卷 32-41页

作者： Azza E el Bassiouny Mona M Nosseir Mona K Zoheiry Noha A Ameen Ahmed M Abdel-hadi Ibrahim M Ibrahim Suher Zada Abdel-Hakeem Saad el-Deen Nora E el-Bassiouni Department of Immunology Theodor Bilharz Research Institute Department of Pathology Central Laboratory Theodor Bilharz Research Institute Department of Hepato-Gastroenterology Theodor Bilharz Research Institute Biology Department American University Zoology Department Faculty of ScienceCairo University Department of Hematology Theodor Bilharz Research Institute

AIM:To investigate cell cycle proteins in chronic hepatitis C virus infection in order to analyze their role in the process of hepatocyte transformation and to characterize their prognostic properties. METHODS:Subjects of the current study included 50 cases of chronic hepatitis C(CHC) without cirrhosis,30 cases of CHC with liver cirrhosis(LC) ,and 30 cases of hepatitis C-related hepatocellular carcinoma(HCC) admitted to the Department of Hepato-Gastroenterology,Theodor Bilharz Research Institute(TBRI) ,Giza,*** wedge liver biopsies,taken during laparoscopic cholecystectomy,were also included as normal *** investigations including urine and stool analysis,liver function tests and prothrombin concentration;serologic markers for viral hepatitis and ultrasonography were done for all cases of the study together with immunohistochemical analysis using primary antibodies against Cyclin D1,Cyclin E,p21,p27 and Rb/p105 proteins. RESULTS:Normal wedge liver biopsies didn't express Cyclin E or Rb/p105 immunostaining but show positive staining for Cyclin D1,p21 and *** D1 expressed nuclear staining that was sequentially increased from CHC to LC(Pelated to Rb/p105 *** expression of p21 and p27 was significantly increased in CHC and LC cases compared to normal controls and HCCs with no significant difference between well-and poorlydifferentiated tumors.p21 showed only a nuclear pattern of staining,while,p27 presented with either cytoplasmic and/or nuclear reactivity in all studied *** analysis revealed a direct relation between Cyclin D1 and p21 in CHC cases(Pelationship was detected between Cyclin D1 and p21 or p27(P<0.001) and between p21 and Rb/p105(P<0.05) in HCCs. CONCLUSION:Upregulation of Cyclin D1 in CHC p

关键词： Chronic hepatitis C Liver cirrhosis Hepatocellular carcinoma Cell cycle Cyclin D1 Cyclin E p21 p27 Rb/p105