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Phase Characterizations and Photocatalytic Applications of Cuo-K_2Mo_4o_(13) Composites

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Acta Metallurgica Sinica(English Letters) 2014年第1期27卷 180-184页

作者： M.kassem Chemistry Department Atomic Energy Commission of Syria

A series of Cuo-K2Mo4013 composite materials have been prepared by mixing appropriates quantities, in solid state, of Cuo and pure K2Mo4013 according to the molar ratios Cuo/K2Mo4013 = 0.05, 0.1, 0.2, 0.5, and 1. The prepared samples were characterized using techniques such as X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FT-IR）, differential thermal analysis （DTA）, nitrogen adsorption measurements, and UV spectroscopy. According to XRD results, the phase composition of the Cuo-KeMo4013 systems has significantly changed by increasing the molar ratio Cuo/ K2Mo4013 where new phases, identified as K2Mo3olo and CuMoo4, have been detected. The formation of these new phases has been tracked through FT-IR and DTA measurements. The nitrogen adsorption-desorption measurements also reveal a change in the pore type of the studied materials due to the presence of these new phases. The photocatalytic activities of K2M04oI3 and Cuo-K2Mo4013 composites were studied by means of monitoring the ability of these materials to the degradation, under UV irradiation, of methyl red in liquid media. It was found that the phase composition of the used samples significantly controls their photocatalytic activities.

关键词： Potassium tetramolybdate Copper oxide Composite Photocatalyst

Synthesizing Distributed Protocol Specifications from a UML State Machine Modeled Service Specification

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Journal of Computer Science & Technology 2012年第6期27卷 1150-1168页

作者： Jehad Al Dallal kassem A.Saleh Department of Information Science College for WomenKuwait University

The object-oriented paradigm is widely applied in designing and implementing communication systems. Unified Modeling Language （UML） is a standard language used to model the design of object-oriented systems. A protocol state machine is a UML adopted diagram that is widely used in designing communication protocols. It has two key attractive advantages over traditional finite state machines： modeling concurrency and modeling nested hierarchical states. In a distributed communication system, each entity of the system has its own protocol that defines when and how the entity exchanges messages with other communicating entities in the system. The order of the exchanged messages must conform to the overall service specifications of the system. In object-oriented systems, both the service and the protocol specifications are modeled in UML protocol state machines. Protocol specification synthesis methods have to be applied to automatically derive the protocol specification from the service specification. otherwise, a time-consuming process of design, analysis, and error detection and correction has to be applied iteratively until the design of the protocol becomes error-free and consistent with the service specification. Several synthesis methods are proposed in the literature for models other than UML protocol state machines, and therefore, because of the unique features of the protocol state machines, these methods are inapplicable to services modeled in UML protocol state machines. In this paper, we propose a synthesis method that automatically synthesizes the protocol specification of distributed protocol entities from the service specification, given that both types of specifications are modeled in UML protocol state machines. our method is based on the latest UML version （UML2.3）, and it is proven to synthesize protocol specifications that are syntactically and semantically correct. As an example application, the synthesis method is used to derive the protocol specifi

关键词： distributed system network protocol object-oriented design method

Spectrally adapted red flare tracers with superior spectral performance

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Defence Technology（防务技术） 2017年第6期13卷 406-412页

作者： Ramy Sadek Mohamed kassem Mohamed Abdo Sherif Elbasuney School of Chemical Engineering Military Technical CollegeKobry ElkobaCairoEgypt

The production of bright light, with vivid color, is the primary purpose of signaling, illuminating devices,and fire control purposes. This study, reports on the development of red flame compositions with enhanced performance in terms of luminous intensity, and color quality. The light intensity and the imprint spectra of developed red flame compositions to standard NATo red tracer(R-284 NATo) were measured using digital luxmeter, and UV-Vis. spectrometer. The main giving of this study is that the light intensity of standard NATo red tracer was increased by 72%, the color quality was also improved by60%(over the red band from 650 to 780 nm). This enhanced spectral performance was achieved by means of deriving the combustion process to maximize the formation of red color emitting species in the combustion flame. Thanks to the optimum ratio of color source to color intensifier using aluminum metal fuel; this approach offered the highest intensity and color quality. Upon combustion, aluminum was found to maximize the formation SrCL(the main reactive red color emitting species) and to minimize the interfering incandescent emission resulted from Mgo and Sro. Quantification of active red color emitting species in the combustion flame was conducted using chemical equilibrium thermodynamic code named ICT. The improvement in red flare performance, established the rule that the color intensifier should be in the range from 10 to 15 Wt % of the total composition.

关键词： Pyrotechnics Colored flames Tracers Luminous intensity Molecular spectroscopy

Novel yellow colored flame compositions with superior spectral performance

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Defence Technology（防务技术） 2017年第1期13卷 33-39页

作者： Ramy Sadek Mohamed kassem Mohamed Abdo Sherif Elbasuney School of Chemical Engineering Military Technical CollegeKobry El-KobbaCairoEgypt

The production of colored flames is the primary purpose of military signaling, projectile tracing, and illuminating devices. Certain elements and compounds when heated to high temperature have the unique property of emitting lines or narrow bands in the visible region(380-780 nm). This study, reports on the development of novel yellow colored flame compositions with enhanced spectral performance in terms of luminous intensity, and color quality to standard Russian yellow tracer. The light intensity and the imprint spectra of developed yellow flares were measured using digital luxmeter and UV e Vis. spectrometer respectively. The main giving of this study is that the light intensity, and color quality of Russian yellow tracer were improved by 287%, and 170% respectively. This was accomplished by means of optimizing the ratio of novel binder to color source using aluminum metal fuel. Aluminumbased formulations were found to maximize the formation of yellow reactive emitting specimens, and to eliminate any interfering incandescent emission resulted from Mg o. Quantification of yellow color emitting specimens in the combustion gaseous products was achieved using chemical equilibrium thermodynamic code named ICT(Institute of Chemical Technology in Germany, Virgin 2008); in an attempt to judge the light quality. This improvement in yellow flare performance established the rule that the emission intensity increases as the reaction temperature increases. In the meantime upper limit of temperature was avoided to maximize the color quality.

关键词： Pyrotechnics Colored flames Yellow tracer Atomic spectroscopy Color quality

Structural Analysis for Qazzaz Metamorphic Core Complex,Northwestern Arabian Shield,Saudi Arabia

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Acta Geologica Sinica(English Edition) 2024年第5期98卷 1187-1201页

作者： Mansour H.AL-HASHIM osama M.K.kassem Department of Geology and Geophysics College of ScienceKing Saud University11451 RiyadhSaudi Arabia Department of Geology National Research CenterCairoEgypt

Identifying deformational mechanisms and associated structures at various scales,ranging from regional-scale structures to microscopic fabric,is crucial for the assessment of tectonic ***-three samples were taken from the Qazzaz metamorphic core complex to estimate the finite strain for felsic and mafic *** samples included gneisses rocks,monzogranite,and metavolcano-sedimentary rocks for both the Thalbah and Bayda *** the Rf/j and Fry methods,the axial ratios(XZ)range about 2.20 to 7.10 and 1.90 to 9.10,*** various rock units,the strain measurements show moderate to highly *** of the observed samples show shallow WNW dipping along a N to WNW trend of finite strain(X).The short axes(Z)based to be subvertical foliation related with a subhorizontal *** results demonstrate that contacts generated at semi-brittle to ductile deformation and that the strain of magnitude has the same value for different lithologic *** concluded that nappe generation in orogens results from pure shear deformation.

关键词： Finite strain metamorphic core complex Qazzaz area Saudi Arabia

Effects of vegetable oil residue after soil extraction on physical-chemical properties of sandy soil and plant growth

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Journal of Environmental Sciences 2008年第12期20卷 1458-1462页

作者： GoNG Zongqiang LI Peijun B. M. Wilke kassem Alef Instirute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Institute of Ecology Berlin University of Technology Berlin 10587 Germany

Vegetable oil has the ability to extract polycyclic aromatic hydrocarbons(PAHs)from contaminated sandy soil for a remediation purpose,with some of the oil remaining in the *** most of the PAHs were removed,the risk of residue oil in the soil was not *** objective of this study was to evaluate the effects of the vegetable oil residue on higher plant growth and sandy soil properties after soil extraction for a better understanding of the soil *** of sunflower oil and column ex...

关键词： soil vegetable oil plant growth organic carbon pH

Fire evacuation visualization in nursing homes based on agent and cellular automata

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Journal of Safety Science and Resilience 2021年第4期2卷 181-198页

作者： Chen Wang Yutong Tang Mukhtar A.kassem Heng Li Zhizhan Wu Director of Intelligence and Automation in Construction Fujian Province Higher-educational Engineering Research Centre College of Civil EngineeringHuaqiao University361021XiamenChina Intelligence and Automation in Construction Fujian Province Higher-educational Engineering Research Centre College of Civil EngineeringHuaqiao University361021XiamenChina College of Civil Engineering Huaqiao University361021XiamenChina Department of Building and Real Estate The Hong Kong Polytechnic UniversityHong Kong

As China’s population ages and the notion of contemporary people evolves,an increasing number of elderly people opt to spend their final years in a nursing ***,there have been more fires in nursing facilities for the *** a result,using computer simulation technology,this paper creates an evacuation micro-simulation model for the elderly and nursing staff,investigates the impact of psychological characteristics and evacuation behavior of the elderly and nursing staffon fire escape during the fire evacuation process,and designs fire evacuation for nursing *** on the nursing home’s regular evacuation paradigm,the study examines the behavioral *** simulate the three models and the influence of various behavioral and psychological features on fire evacuation,the authors utilized the MATLAB software,which is based on Agent theory and cellular *** simulation results show that the three models proposed in this study are capable of accurately describing reality.

关键词： Nursing home Staff evacuation Agent modeling Cellular automata Normal evacuation Crowded evacuation Panic evacuation

Novel colored flames via chromaticity of essential colors

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Defence Technology（防务技术） 2019年第2期15卷 210-215页

作者： Ramy Sadek Mohamed kassem Mohamed Abdo Ahmed Fahd Hesham Tantawy Amir Elsaidy Sherif Elbasuney School of Chemical Engineering Military Technical College

Colored flame compositions have distinctive variety of applications ranging from military signaling,rocket tracking, and illuminating devices. Certain elements and compounds when heated to high temperature are able to emit unique wavelengths in the visible region. This study, reports on the development of novel colored flames that cannot be generated by emitting atomic/molecular species. This was achieved by using chromaticity of basic colored flames. Mixing of high quality primary colored flames including Blue, Yellow, and Red in proper ratio was conducted; any interfering incandescent emission resulted from Mgo was eliminated using Al metal fuel. The spectral characteristics in terms of luminous intensity, and color quality were evaluated using digital luxmeter and UV-Vis. spectrometer *** quality mixed colored flames include violet, sweet pink, and marigold were developed. This study shaded the light on the state of the art for the real development of novel colored flame compositions and chromaticity of basic colored flames.

关键词： Pyrotechnics Colored flame Atomic spectroscopy Molecular spectroscopy Luminous intensity Color quality Chromaticity

Effect of Elevated Co_2 and Drought on Soil Microbial Communities Associated with Andropogon gerardii

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Journal of Integrative Plant Biology 2008年第11期50卷 1406-1415页

作者： Issmat I. kassem Puneet Joshi Yon Sigler Scott Heckathorn Qi Wang Department of Environmental Sciences University of Toledo Ohio 43606 USA Department of Civil Engineering University of Toledo Ohio 43606 USA

our understanding of the effects of elevated atmospheric Co2, singly and in combination with other environmental changes, on plant-soil interactions is incomplete. Elevated Co2 effects on C4 plants, though smaller than on C3 species, are mediated mostly via decreased stomatal conductance and thus water loss. Therefore, we characterized the interactive effect of elevated Co2 and drought on soil microbial communities associated with a dominant C4 prairie grass, Andropogon gerardii Vitman. Elevated Co2 and drought both affected resources available to the soil microbial community. For example, elevated Co2 increased the soil C：N ratio and water content during drought, whereas drought alone decreased both. Drought significantly decreased soil microbial biomass. In contrast, elevated Co2 increased biomass while ameliorating biomass decreases that were induced under drought. Total and active direct bacterial counts and carbon substrate use （overall use and number of used sources） increased significantly under elevated Co2. Denaturing gradient gel electrophoresis analysis revealed that drought and elevated Co2, singly and combined, did not affect the soil bacteria community structure. We conclude that elevated Co2 alone increased bacterial abundance and microbial activity and carbon use, probably in response to increased root exudation. Elevated Co2 also limited drought-related impacts on microbial activity and biomass, which likely resulted from decreased plant water use under elevated Co2. These are among the first results showing that elevated Co2 and drought work in opposition to modulate plant-associated soil-bacteria responses, which should then influence soil resources and plant and ecosystem function.

关键词： denaturing gradient gel electrophoresis drought elevated Co2 soil microbial communities.