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Linear and nonlinear optical analysis on semiorganic-proline cadmium chloride single crystal

Chinese Physics B 2018年第4期27卷 476-482页

作者： mohd Anis m I Baig S S Hussaini m D Shirsat mohd Shkir H A Ghramh Department of Physics Sant Gadge Baba Amravati University Amravati-444602 Maharashtra India Ram meghe College of engineering and management Amravati-444701 Maharashtra India Crystal Growth Laboratory Department of Physics Milliya Arts Science and Management Science College Beed431122 Maharashtra India RUSA Center for Advanced Sensor Technology Department of Physics Dr. Babasaheb-Ambedkar-Marathwada University A urangabad-431005 Maharashtra India Research Center for Advanced materials Science (RCAmS) King Khalid University P. O. Box 9004 Abha-61413 Saudi Arabia Advanced Functional materials & Optoelectronic Laboratory (AFmOL) Department of Physics College of Science King Khalid University P. O. Box 9004 Ahha-61413 Saudi Arabia

In the current investigation,L-proline cadmium chloride monohydrate（LPCC） single crystal is grown by a slow solvent evaporation technique to identify its credibility for nonlinear optical device *** constituent elements of LPCC crystal are determined by the energy dispersive spectroscopic（eDS） *** single crystal x-ray diffraction technique is used to determine the structural dimensions of LPCC *** UV-visible studies are carried out within a wavelength range of 200 nm–1100 nm to determine the optical transmittance of LPCC *** linear optical parameters of LPCC crystal are evaluated using the transmittance data to discuss its importance for distinct optical *** Nd：YAG laser assisted Kurtz–Perry test is carried out to determine the enhancement in second harmonic generation efficiency of LPCC crystal with reference to KDP *** Z-scan technique is employed to assess the third order nonlinear optical（TONLO） properties of LPCC crystal at 632.8 *** Z-scan data are utilized to evaluate the TONLO refraction,absorption and susceptibility of LPCC *** color oriented luminescence behavior of LPCC crystal is investigated within a spectral range of 350 nm–700 *** dependence of dielectric constant and dielectric loss on temperature and frequency is evaluated through the dielectric measurement studies.

关键词： crystal growth dielectric studies nonlinear optical materials optical studies

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Coherent Structures Generated by a Circular Jet Issuing into a Cross Laminar Boundary Layer

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Journal of Thermal Science 1997年第2期6卷 81-85页

作者： L. e. Brizzi J. L. Bousgarbiès e. Foucault Laboratoire d’etudes Aérodynamiques URA 191 Poitiers France Laboratoire d’etudes Aérodynamiques URA 191 (eSIP) Poitiers France

Visualisations by LASeR topographies and velocity measurements by LDV have allowed the study of the fiow resulting from the illteraction between a circular jet and a cross boundary layer. This type of fiow is dominated by the presence of many complex vortices that come from the recombining of the vorticity created in the injection tube and that created aIong the chamber floor.

关键词： jet vortical structures cross-flow boundary layer

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Time-Resolved emission Spectroscopic Study of Laser-Induced Steel Plasmas

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Plasma Science and Technology 2013年第6期15卷 546-551页

作者： m.L.SHAH A.K.PULHANI B.m.SURI G.P.GUPTA Laser and Plasma Technology Division Bhabha Atomic Research CentreMumbai-400 085India

Laser-induced steel plasma is generated by focusing a Q-switched Nd：YAG visible laser（532 nm wavelength） with an irradiance of 1 x 109 W/cm2 on a steel sample in air at atmospheric *** echelle spectrograph coupled with a gateable intensified charge-coupled detector is used to record the plasma *** time-resolved spectroscopic measurements of the plasma emissions,the temperature and electron number density of the steel plasma are determined for many times of the detector *** validity of the assumption by the spectroscopic methods that the laser-induced plasma（LIP） is optically thin and is also in local thermodynamic equilibrium（LTe） has been evaluated for many delay *** the temporal evolution of the intensity ratio of two Fe I lines and matching it with its theoretical value,the delay times where the plasma is optically thin and is also in LTe are found to be 800 ns,900 ns and 1000 ns.

关键词： laser-induced plasma steel emission spectroscopy plasma temperature and electron number density

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An Approach to Polynomial NARX/NARmAX Systems Identification in a Closed-loop with Variable Structure Control

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International Journal of Automation and computing 2008年第3期5卷 313-318页

作者： O.m.mohamed Vall R.m'hiri Laboratory of Systems Analysis and Control Department of Electrical EngineeringNational School for Engineers of Tunis Research Unit of electrical machines and Power Systems(Rme) National Institute of Applied Sciences and Technology of Tunis

many physical processes have nonlinear behavior which can be well represented by a polynomial NARX or NARmAX model. The identification of such models has been widely explored in literature. The majority of these approaches are for the open-loop identification. However, for reasons such as safety and production restrictions, open-loop identification cannot always be done. In such cases, closed-loop identification is necessary. This paper presents a two-step approach to closed-loop identification of the polynomial NARX/NARmAX systems with variable structure control （VSC）. First, a genetic algorithm （GA） is used to maximize the similarity of VSC signal to white noise by tuning the switching function parameters. Second, the system is simulated again and its parameters are estimated by an algorithm of the least square （LS） family. Finally, simulation examples are given to show the validity of the proposed approach.

关键词： Identification variable structure control (VSC) genetic algorithm (GA) NARX/NARmAX models

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Database Recovery Technique for mobile Computing:A Game Theory Approach

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Computers, materials & Continua 2022年第2期70卷 3205-3219页

作者： magda m.madbouly Yasser F.mokhtar Saad m.Darwish Institute of Graduate Studies and Research Alexandria UniversityAlexandriaEgypt Assistant General manager IT DepartmentEgyptian Petrochemicals Co.AlexandriaEgypt

Contact between mobile hosts and database servers presents many problems in themobile Database System(mDS).It is harmed by a variety of causes,including handoff,inadequate capacity,frequent transaction updates,and repeated failures,both of which contribute to serious issues with the information system’s ***,error tolerance technicality allows devices to continue performing their functions in the event of a *** aim of this paper is to identify the optimal recovery approach from among the available state-of-the-art techniques in mDS by employing game *** of the presented recovery protocols are chosen and evaluated in order to determine the most critical factors affecting the recovery mechanism,such as the number of processes,the time required to deliver messages,and the number of messages logged-in ***,using the suggested payout matrix,the game theory strategy is adapted to choose the optimum recovery technique for the specified environmental *** NS2 simulatorwas used to carry out the tests and apply the chosen recovery *** experiments validate the proposed model’s usefulness in comparison to other methods.

关键词： mobile computing game theory decision making mobile database recovery

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effect of the addition of rare earths on the activity of alumina supported copper cobaltite in CO oxidation, CH_4 oxidationand NO decomposition

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Journal of Rare earths 2015年第4期33卷 382-390页

作者： B.Ivanov I.Spassova m.milanova G.Tyuliev m.Khristova Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences Faculty of Chemistry and Pharmacy Sofia University Institute of Catalysis Bulgarian Academy of Sciences

The effect of the addition of small amounts of rare earths （Ln=La, Ce, Nd and Gd） to alumina supported copper-cobalt spinel oxide on the catalysts efficiency in CO and CH4 oxidation and in NO decomposition was investigated. Samples of Ln/CuCo/AI catalyst were prepared and characterized by X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, atomic absorption spectroscopy （AAS）, scanning electron mieroscopy-energy dispersive spectroscopy （Sem-eDS）, H2-temperature-programmed reduc- tion （H2-TPR）, electron paramagnetic resonanee （ePR） spectroscopy and low temperature nitrogen adsorption, The results showed that the addition of rare earths changed the surface state of the alumina supported copper-cobalt spinel catalyst. As a result, partial re- duction of copper species was observed as well as migration of these species between the surface and the bulk. The Ln/CuCo/A1 catalysts behaved differently in oxidation and reduction processes. In oxidation processes where oxide structure was important, Ce/CuCo/A1 and Nd/CuCo/A1 were the most active catalysts. The catalyst Ce/CuCo/AI was the most active in the oxidation reactions because of the availability and favorable surface distribution of the redox couples Cu＋/Cu2＋ and Ce3＋/Ce4＋. In NO decompostion, Ln-modified catalysts significantly improved the selectivity of the process to N2.

关键词： copper cobaltite NO decomposition CO oxidation CH4 oxidation rare earths

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Utilization of iron oxide bearing pellets waste for preparing hard and soft ferromagnetic glass ceramics

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Journal of Advanced Ceramics 2014年第4期3卷 259-268页

作者： Salwa A.m.ABDeL-HAmeeD Ibrahim m.HAmeD Nehal A.eRFAN Glass Research Department National Research CenterDokkiCairoEgypt Chemical engineering Department Faculty of EngineeringMinia UniversityMiniaEgyp

About 8%of the imported iron oxide pellets burdens to egypt are *** this paper,broken pellets waste(BPW)is used as raw material for the preparation of hard magnetic glass ceramics(HmGC)as well as soft magnetic glass ceramics(SmGC).About 54 wt%and 37 wt%of BPW are used to prepare SmGC and HmGC,*** thermal analysis(DTA)reveals two broad exothermic peaks for HmGC at 591℃and 697℃,whereas one exothermic peak at 820℃is detected for SmGC.X-ray diffraction(XRD)shows the crystallization of hematite as the sol phase in BPW,and meanwhile,Zn-ferrite and Ba-hexaferrite are identified in SmGC and HmGC,*** electron microscopy(Tem)reveals the crystallization of nanosize particles of~20 nm for SmGC and~12 nm for *** scanning magnetometer(VSm)reveals an increase in saturation magnetization from~1 emu/g for BPW to~77 emu/g for SmGC and 21 emu/g for HmGC.

关键词： magnetic materials nanostructure pellets waste

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Haplotype Diversity at Sub1 Locus and Allelic Distribution Among Rice Varieties of Tide and Flood Prone Areas of South-east Asia

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Rice science 2017年第4期24卷 198-206页

作者： A.S.m.mASUDUZZAmAN md.maksudul HAQUe A.K.m.SHAmSUDDIN m.A.SALAm md.Ansar ALI Plant Breeding Division Bangladesh Rice Research InstituteGazipur 1701Bangladesh Scientific Officer(Golden Rice) Plant Breeding DivisionBangladesh Rice research InstituteGazipur 1701Bangladesh Department of Genetics and Plant Breeding Bangladesh Agricultural UniversityMymensingh 2202Bangladesh Director Research Bangladesh Rice Research InstituteGazipur 1701Bangladesh

Single nucleotide polymorphisms and restriction digestion-based haplotype variations among 160 flood prone rice varieties were analyzed with enzymes Alu I and Cac8 I to generate polymorphisms at Sub1A and Sub1C loci （conferring submergence tolerance）, respectively. Haplotype associated with phenotype was used to study the haplotype variations at Sub1A and Sub1C loci and to determine their functional influence on submergence tolerance and stem elongation. Three patterns at Sub1A locus, Sub1A0 （null allele）, Sub1A1 （does not cut） and Sub1A2 （one SNP）, and four patterns at Sub1C locus, Sub1C1, Sub1C2, Sub1C3 and Sub1C4, were generated. Both tolerant Sub1A1 and intolerant Sub1A2 had the same length, but the difference was presence of a restriction site in the Sub1A2, but absent at the Sub1A1. Further, two types of polymorphism were detected at the Sub1C, one included major length polymorphisms （165, 170 and 175 bp） and the other was a single restriction site at different position. eight haplotypes （different combinations of the two loci）, A1C1, A1C2, A1C4, A2C2, A2C4, A0C2, A0C3 and A0C4, were detected among 160 varieties. Haplotype A1C1 was comparatively more related to haplotypes A1C2 and A1C4, having the same Sub1A allele, and these haplotypes were found only in Bangladeshi, Sri Lankan and Indian varieties. most tolerant varieties in A1C1 haplotype showed slow elongation, having tolerant specific Sub1A1 and Sub1C1 alleles. Further, the varieties madabaru and Kottamali （A2C2） also showed moderate level of tolerance without Sub1A1 allele. These varieties were different with FR13A and also suspected to carry different novel tolerant genes at other loci. These materials could be used for hybridization with Sub1 varieties for pyramiding additional tolerant specific alleles into a single genotype for improving submergence tolerance in rice.

关键词： haplotype Sub1 allele single nucleotide polymorphism submergence

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A 24 hour naproxen dose on gastrointestinal distress and performance during cycling in the heat

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Sports medicine and Health Science 2020年第1期2卷 19-24页

作者： Dawn m.emerson J.mark Davis Stephen CL.Chen Toni m.Torres-mcGehee Craig e.Pfeifer Charles C.emerson Joseph D.Bivona Justin V.Stone Department of Health Sportand Exercise SciencesUniversity of KansasLawrenceKansasUSA Department of exercise Science University of South CarolinaColumbiaSCUSA Division of exercise and Sport Science Bob Jones UniversityGreenvilleSouth CarolinaUSA Applied Sport and exercise Sciences The ParkUniversity of GloucestershireCheltenham GL502RHUnited Kingdom Department of Athletics University of Missouri-Kansas CityKansas CityUSA

Using a double-blind,randomized and counterbalanced,cross-over design,we assessed naproxen's effects on gastrointestinal(GI)distress and performance in eleven volunteers(6 male,5 female).Participants completed 4 trials:1)placebo and ambient);2)placebo and heat;3)naproxen and ambient;and 4)naproxen and *** variables were one placebo or 220 mg naproxen pill every 8 h(h)for 24 h and ambient(22.7±1.8℃)or thermal environment(35.7±1.3℃).Participants cycled 80 min at a steady heart rate then 10 min for maximum *** exertion was measured throughout *** distress was assessed pre-,during,post-,3 h post-,and 24 h post-cycling using a GI index for upper,lower,and systemic *** statistically significant differences occurred between conditions at any time for GI symptoms or perceived exertion,distance,or heart rate during maximum effort.A 24 h naproxen dose did not significantly affect performance or cause more frequent or serious GI distress when participants were euhydrated and cycling at moderate intensity in a thermal environment.

关键词： NSAID Gastrointestinal bleeding Heart rate Perceived exertion

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Thermomechanical Behavior of Brake Drums Under extreme Braking Conditions

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Computers, materials & Continua 2022年第8期72卷 2259-2273页

作者： T.Khatir m.Bouchetara K.Derrar m.Djafri S.Khatir m.Abdel Wahab Institute of Science and Technology University Center Salhi Ahmed NaamaAlgeria Laboratory of Gas Combustion and environment University of Sciences and Technology of OranL.P 1505 El-MenaouerOranUSTO 31000Algeria High School of Aeronautic Techniques Dar el Beida Algeria Ho Chi minh City Open University Ho Chi Minh CityViet Nam Faculty of engineering Van Lang UniversityHo Chi Minh CityVietnam Soete Laboratory Faculty of Engineering and ArchitectureGhent UniversityTechnologieparkZwijnaarde 903B-9052 ZwijnaardeBelgium

Braking efficiency is characterized by reduced braking time and distance,and therefore passenger safety depends on the design of the braking *** the braking of a vehicle,the braking system must dissipate the kinetic energy by transforming it into heat energy.A too high temperature can lead to an almost total loss of braking *** excessive rise in brake temperature can also cause surface cracks extending to the outside edge of the drum friction *** transfer and temperature gradient,not to forget the vehicle’s travel environment(high speed,heavy load,and steeply sloping road conditions),must thus be the essential criteria for any brake system *** aim of the present investigation is to analyze the thermal behavior of different brake drum designs during the single emergency braking of a heavy-duty vehicle on a steeply sloping *** calculation of the temperature field is performed in transient mode using a three-dimensional finite element model assuming a constant coefficient of *** this study,the influence of geometrical brake drum configurations on the thermal behavior of brake drums with two different materials in grey cast iron FG200 and aluminum alloy 356.0 reinforced with silicon carbide(SiC)particles is analyzed under extreme vehicle braking *** numerical simulation results obtained using Fe software ANSYS are qualitatively compared with the results already published in the literature.

关键词： Drum brake finite element method braking energy distribution friction heat power friction heat flux transient temperature field

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