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HDec-POSMDPs MRS Exploration and Fire Searching Based on IoT Cloud Robotics

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International Journal of Automation and computing 2020年第3期17卷 364-377页

作者： Ayman el Shenawy Khalil mohamed Hany Harb Systems and Computers Engineering Department Faculty of EngineeringAl-Azhar UniversityCairo 11751Egypt Information Technology College Misr University for Science and Technology(MUST)Cairo 77Egypt

The multi-robot systems(MRS)exploration and fire searching problem is an important application of mobile robots which require massive computation capability that exceeds the ability of traditional MRS′*** paper propose a cloud-based hybrid decentralized partially observable semi-Markov decision process(HDec-POSMDPs)*** proposed model is implemented for MRS exploration and fire searching application based on the Internet of things(IoT)cloud robotics *** this implementation the heavy and expensive computational tasks are offloaded to the cloud *** proposed model achieves a significant improvement in the computation burden of the whole task relative to a traditional *** proposed model is applied to explore and search for fire objects in an unknown environment;using different sets of robots *** preliminary evaluation of this implementation demonstrates that as the parallelism of computational instances increase the delay of new actuation commands which will be decreased,the mean time of task completion is decreased,the number of turns in the path from the start pose cells to the target cells is minimized and the energy consumption for each robot is reduced.

关键词： Multi-robot systems hybrid decentralized partially observable semi-Markov decision process(HDec-POSMDPs) multi-robot systems(MRS)exploration and fire searching cloud robotics cloud computing

Influence of host age and host deprivation on longevity, egg load dynamics and oviposition rate in Microplitis rufiventris

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Insect Science 2007年第6期14卷 485-495页

作者： ESMAT mohamed HEGAZI GEHAN mohamed ABD el-AZIZ AHMED YOUSEF el-SHAZLY WEDAD EMAM KHAFAG Department of Entomology Faculty of Agriculture University of Alexandria Plant Protection Research Institute Sabahia Alexandria Egypt

Adult size, longevity, egg load dynamics and oviposition ofMicroplitis rufiventris Kok. which began their development in the first, second, third （preferred hosts） or fourth （non-preferred hosts） instar larvae of Spodoptera littoralis （Boisd.） were studied. The parasitoid size was largely determined by the initial host size at parasitism. Non-ovipositing females derived from older hosts lived for longer periods than those derived from younger ones. However, the ovipositing females, irrespective of their size, lived for almost the same periods. At emergence, the oviducts of adult females contain a significant amount of mature eggs available for oviposition for a few hours on eclosion day. Egg load increases during the early phase of adult life. The amount of additional mature eggs and rate of egg maturation per hour was greater for wasps derived from preferred hosts compared with those in females derived from non-preferred hosts. The pattern of egg production in M. rufiventris females depended on the availability of hosts for parasitization. Host-deprived females depleted the egg complement with aging; the longer the host deprivation, the lower the oviduct egg load. Marked reduction in both realized or potential fecundity of host-deprived females was observed following host availability. Host privation for more than 3 days induced a marked deficit fecundity pattern through the female＇ s life. The realized fecundity was determined by the interaction among host availability, the number of eggs that are matured over the female＇ s life span, oviposition rate and host size from which the female was derived. These results suggest that：（i） M. rufiventris wasp is a weak synovigenic species; （ii） the maturation of additional eggs is inhibited once the maximum oviduct egg load is reached; （iii） the egg load of the newly emerged female is significantly less than the realized fecundity; and （iv） because M. rufiventris females oviposit fewer eggs when they begin depleting their

关键词： aging egg production host privation longevity Microplitis rufiventris,oviposition Spodoptera littoralis wasp size

The comparison of the Wnt signaling pathway inhibitor delivered electrospun nanoyarn fabricated with two methods for the application of urethroplasty

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Frontiers of Materials Science 2016年第4期10卷 346-357页

作者： Xuran GUO Kaile ZHANG mohamed el-AASSAR Nanping WANG Hany el-HAMSHARY mohamed el-NEWEHY Qiang FU Xiumei MO State Key Lab for Modification of Chemical Fibers & Polymer Materials College of Chemistry & Chemical Engineering and Biotechnology Donghua University Shanghai 201620 China Department of Urology Affiliated Sixth People's Hospital Shanghai Jiaotong University Shanghai 200030 China Polymer Materials Research Department Advanced Technology and New Material Institute City of Scientific Research and Technological Applications (SRTA-City) New Borg El-Arab City Alexandria 21934 Egypt Shanghai Aquatic Product Research Institute Shanghai 200030 China Department of Chemistry College of Science King Saud University Riyadh i 1451 Saudi Arabia Department of Chemistry Faculty of Science Tanta University Tanta 31527 Egypt Shandong International Biotechnology Park Development Co. Ltd. Shanghai 200030 China

Urethral strictures were common disease caused by over-expression of extracellular matrix from fibroblast. In this study, we compare two nanoyarn scaffolds for improving fibroblasts infiltration without inhibition the over-expression of extracellular matrix. Collagenlpoly（L-lactide-co-caprolactone）（ColIP（LLA-CL）） nanoyarn scaffolds were prepared by conjugated electrospinning and dynamic liquid electrospinning, respectively, in addition, co-axial electrospinning technique was combined with the nanoyarn fabrication process to produce nanoyarn scaffolds loading Wntsignaling pathway inhibitor. The mechanical properties of the scaffolds were examined and morphology was observed by SEM. Cell morphology, proliferation and infiltration on the scaffolds were investigated by SEM, MTT assay and H＆E staining, respectively. The release profiles of different scaffolds were determined using HPLC. The results indicated that cells showed an organized morphology along the nanoyarns and considerable infiltration into the nanoyarn scaffolds prepared by dynamic liquid electrospinning （DLY）. It was also observed that the DLY significantly facilitate cell proliferation. The D-DLY could facilitate the infiltration of the fibroblasts and could be a promising scaffold for the treatment of urethra stricture while it may inhibit the collagen production.

关键词： biomaterials nanoyarn electrospinning inhibitor

Fibrolamellar hepatocellular carcinoma:A rare but unpleasant event

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World Journal of Gastrointestinal Oncology 2022年第6期14卷 1103-1114页

作者： Walaa Abdelhamed mohamed el-Kassas Department of Endemic Medicine Sohag UniversitySohag 14322Egypt Department of Endemic Medicine Faculty of MedicineHelwan UniversityCairo 11795Egypt

Fibrolamellar carcinoma(FLC)is a rare variant of hepatocellular carcinoma(HCC),comprising 1%–9%of all *** is a poorly understood malignancy,which seems to be more prevalent in young patients with no underlying liver *** term“fibrolamellar”is derived from thick fibrous collagen bands surrounding the tumor *** HCC,cirrhosis and viral hepatitis infection are not predisposing to FLC,and it is not associated with elevations in serum *** patients often present with vague abdominal pain,nausea,malaise,and weight *** cases present are at an advanced stage at the time of initial ***,curative treatment options can still be offered to up to 70%of ***(resection/liver transplantation)is the mainstay of treatment and the only potentially curative *** have been less chemoresponsive than the conventional HCC,however,in advanced cases,multimodality treatments can be *** advances in molecular studies of FLC have found a unique DNAJB1–PRKACA fusion transcript in most of the cases *** review aims to describe clinical characteristics,diagnostic methods,and therapeutic modalities for this rare tumor to raise awareness among clinicians and surgeons.

关键词： Fibrolamellar carcinoma Hepatocellular carcinoma Hepatitis Cirrhosis Viral hepatitis infection

Influence of ECAP as grain refinement technique on microstructure evolution, mechanical properties and corrosion behavior of pure aluminum

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Transactions of Nonferrous Metals Society of China 2015年第12期25卷 3865-3876页

作者： mohamed Ibrahim ABD el AAL M.M.SADAWY Mechanical Design and Production Department Faculty of Engineering Zagazig University Mining and Petroleum Engineering Department Al-Azhar University

Pure aluminum samples were processed by equal channel angular pressing（ECAP） up to 10 passes at room temperature. The effects of the ECAP number of passes on the microstructure evolution, the mechanical properties, deformation homogeneity and corrosion behavior of the processed samples were fully investigated. The imposed strain resulted in an obvious reduction in the grain size from 390 μm before ECAP down to 1.8, 0.4, and 0.3 μm after ECAP up to 2, 4 and 10 passes, respectively. The microhardness, deformation homogeneity and tensile strength were increased while the elongation decreased with the increase of ECAP number of passes. Immersion tests, open circuit potential, Tafel polarization, cyclic polarization and potentiostatic measurements in 3.5% Na Cl solution revealed an obvious improvement in the corrosion resistance of ECAP processed samples compared with the as-cast sample. The increase of the number of passes can be used successfully in producing ultra-fine grained（UFG） bulk pure aluminum sample with a high misorientation angle, reasonably high mechanical properties and corrosion resistance.

关键词： equal channel angular pressing(ECAP) microstructure mechanical properties corrosion resistance passive film pitting

Pan-African high-grade metamorphism of southern Sinai, Egypt, fluid inclusion evidence

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Chinese Journal Of Geochemistry 2009年第4期28卷 358-363页

作者： mohamed el Tokhi Abdalla Musallum Geology Department College of Science United Arab Emirates UniversityUnited Arab Emirates

Fluid inclusions in the leucosomes of Wadi Feiran migmatites showed that CO2, H2O and (H2O-CO2) fluids were likely to have been present when partial melting began in these rocks. Low salinity, aqueous fluid, to a lesser extent, CO2-rich fluids are the most abundant fluids. The present study suggests that high-density CO2 inclusions were formed at the earliest stage, while H2O inclusions were formed at the late stage. In an intermediate stage, low-density CO2 and H2O, CO2 inclusions were formed. At the early stage of uplift and during melt crystallization, the CO2-bearing vapour was trapped at grain boundaries. At the late stage of uplift, H2O released at the time of crystallization of the melt was trapped as inclusions.

关键词：流体包裹体西奈半岛变质作用埃及证据二氧化碳局部熔融熔体包裹体

Metabolic aspects of hepatitis C virus

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World Journal of Gastroenterology 2022年第22期28卷 2429-2436页

作者： mohamed el-Kassas Abeer Awad Department of Endemic Medicine Faculty of MedicineHelwan UniversityCairo 11795Egypt Department of Internal Medicine Faculty of MedicineCairo UniversityCairo 11566Egypt

Many metabolic factors are associated with chronic hepatitis C virus(HCV)infection and can influence the course of the illness and impact the progression of liver and non-liver-related diseases through complex *** of these factors impact the course of chronic HCV(CHC)and result in the conceptual translation of CHC from a localized to systemic *** the traditional liver manifestations associated with CHC infection,such as cirrhosis and hepatocellular carcinoma,various extrahepatic disorders are associated with HCV infection,including atherosclerosis,glucose and lipid metabolic disturbances,alterations in the iron metabolic pathways,and lymphoproliferative *** coexistence of metabolic disorders and CHC is known to influence the chronicity and virulence of HCV and accelerates the progression to liver fibrosis and hepatocellular *** resistance is one of the key factors that have a tremendous metabolic impact on ***,there is a great need to properly evaluate patients with CHC infection and correct the modifiable metabolic risk ***,patients with HCV who achieved a sustained virological response showed an overall improvement in glucose metabolism,but the exact evidence still requires further studies with long-term *** review delineates the most recent evidence on the main metabolic factors associated with CHC and the possible influence of chronic HCV infection on metabolic features.

关键词： Hepatitis C virus Metabolic factors Steatosis Insulin resistance

Microstructure and mechanical properties of hot extruded 6016 aluminum alloy/graphite composites

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Journal of Materials Science & Technology 2018年第9期34卷 1580-1591页

作者： mohamed M.el-Sayed Seleman mohamed M.Z.Ahmed Sabbah Ataya Department of Metallurgical and Materials Engineering Faculty of Petroleum and Mining Engineering Suez University 43518 Suez Egypt Suez and Sinai Metallurgical and Materials Research Center of Scientific Excellence (SSMMR-CSE) 43518 Suez Egypt The British University in Egypt Mechanical Engineering Deportment El-Sherouk City 11837 Cairo Egypt Department of Mechanical Engineering College of Engineering AI Imam Mohammad Ibn Saud Islamic University Riyadh 11432 saudi Arabia

The incorporation of graphite particles into AA6016 aluminum alloy matrix to fabricate metal/ceramic composites is still a great challenge and various parameters should be considered. In this study, dense AA6016 aluminum alloy/（0-20 wt%） graphite composites have successfully been fabricated by powder metallurgy process. At first, the mixed aluminum and graphite powders were cold compacted at 200 MPa and then sintered at 500 ℃ for 1 h followed by hot extrusion at 450 ℃. The influence of ceramic phases（free graphite and in-situ formed carbides） on microstructure, physical and mechanical properties of the produced composites were finally investigated. The results show that the fabricated composites have a relative density of over 98%. SEM observations indicate that the graphite has a good dispersion in the alloy matrix even at high graphite content. Hardness of all the produced composites was higher than that of aluminum alloy matrix. No cracks were observed at strain less than 23% for all hot extruded *** strength, reduction in height, ultimate tensile stress, fracture stress, yield stress, and fracture strain of all Al/graphite composites were determined by high precision second order equations. Both compressive and ultimate tensile strengths have been correlated to microstructure constituents with focusing on the in-situ formed ceramic phases, silicon carbide（SiC） and aluminum carbide（Al4 C3）. The ductile fracture mode of the produced composites became less dominant with increasing free graphite content and in-situ formed carbides. Wear resistance of Al/graphite composites was increased with increasing graphite content. Aluminum/20 wt% graphite composite exhibited superior wear resistance over that of AA6016 aluminum alloy.

关键词： AA6016/graphite composites Hot extrusion In-situ carbides Mechanical properties Wear resistance Fracture behavior

New phase transitions for formulas in Lukasiewicz logic

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Frontiers of Computer Science 2020年第6期14卷 197-199页

作者： mohamed el HALABY Areeg ABDALLA Department of Mathematics Faculty of ScienceCairo UniversityGiza 12613Egypt

1 Introduction L-clausal forms is an interesting class of formulas in Eukasiewicz logic that was shown to be NP-complete[1].These formulas are defined over the following Lukasiewicz operations:negation-x=1-x strong di... 详细信息

关键词： formulas transitions Lukasiewicz