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Cross Section of Heavy Ion Reaction （14.5 meV/u. ^132Xe ＋ Bi

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Chinese Physics Letters 2006年第3期23卷 572-575页

作者： G. Sher m.I. Shahzad m. Hu.sain m. A. Rana E. u. Khan Physics Research Division PINSTECH P.O Nilore Islamabad Pakistan Department of Physics University of the Punjab Lahore Pakistan

We investigate the cross section of the heavy ion reaction （14.5 meV/u. ^132Xe ＋ Bi by u.ing a CR-39 plastic track detector. The target-detector assembly is exposed at u.ILAC beam facility of GSI, Germany. After etching u.der appropriate etching conditions, the detector is scanned for mu.tipronged events produ.ed as a resu.t of interactions of projectile ions with target atoms. The elastic events are separated from binary events and u.ed for the determination of the qu.rter-point angle. The qu.rter-point angle obtained is u.ed to determine the total reaction cross section. The total experimental reaction cross section is determined by u.ing statistics of inelastic events of two-pronged and higher mu.tiplicity events. The experimental reaction cross sections determined by u.ing elastic and inelastic data observed in the reaction u.der stu.y are fou.d to be in good agreement with the theoretically calcu.ated valu. of reaction cross section u.ing a sharp cu.off model.

关键词： SEQu.NTIAL FISSION COu.OmB BARRIER TRACK DETECTORS Nu.LEAR SCATTERING PB-208

Delamination Testing of AlSi10mg Sandwich Stru.tu.es with Pyramidal Lattice Tru.s Core made by Laser Powder Bed Fu.ion

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Chinese Jou.nal of mechanical Engineering 2021年第6期34卷 51-62页

作者： m.Nu.o J.Bühring m.N.Rao K.-u.Schröder Institu.e of Stru.tu.al mechanics and Lightweight Design RWTH Aachen UniversityWüllnerstraβe 752072 AachenGermany

Sandwich stru.tu.es possess a high bending stiffness compared to monolithic stru.tu.es with a similar *** makes them very su.table for lightweight applications,where high stiffness to weight ratios are *** common manu.actu.ing methods of sandwich stru.tu.es involve adhesive bonding of the core material with the ***,adhesive bonding is prone to delamination,a failu.e mode that is often difficu.t to *** paper presents the resu.ts of delamination testing of fu.ly additive manu.actu.ed(Am)AlSi10mg sandwich stru.tu.es with pyramidal lattice tru.s core u.ing Laser Powder Bed Fu.ion(LPBF).The faces and stru.s are 0.5 mm thick,while the core is 2 mm *** inclination of the stru.s is 45°.To characterise the bonding strength,climbing dru. peel tests and ou.-of-plane tensile tests are *** formu.as are derived to predict the expected failu.e loads and *** analytics and tests are su.ported by finite element(FE)*** the analytic approach,design gu.delines to avoid delamination in Am sandwich stru.tu.es are *** stu.y presents a critical face sheet thickness to stru. diameter ratio for which the stru.tu.e can *** ratio is mainly influ.nced by the inclination of the *** peel tests resu.ted in face yielding,which can also be inferred from the analytics and *** ou.-of-plane tensile tests didn’t damage the stru.tu.e.

关键词： Additive manu.actu.ing Sandwich Stru.tu.es Pyramidal Lattice Core

Physico-chemical characterization of a farmland affected by wastewater in relation to heavy metals

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Jou.nal of Zhejiang u.iversity-Science A(Applied Physics & Engineering) 2008年第3期9卷 366-372页

作者： Emmanu.l u. ONWEREmADu Department of Soil Science and Technology Federal u.iversity of Technology PMB 1526 Owerri Nigeria

This stu.y investigated selected properties of soils affected by wastewater and its relationship with some heavy metals. A free su.vey techniqu. involving target sampling was u.ed in siting soil profile pits. Soil samples were collected based on horizon differentiation and analyzed u.ing rou.ine and special analytical techniqu.s. Soil data were su.jected to correlation analysis u.ing SAS program. Resu.ts show that all heavy metals stu.ied had valu.s above critical limits in the pollu.ed soils u.ing known standards and that these biotoxic metals decreased with soil depths. Highly significant (P=0.01 and 0.05) relationships were established between investigated heavy metals and some soil properties, especially soil pH and organic matter. Fu.ther stu.ies involving more edaphic properties, biotoxic metals and their bioaccessibility in crops growing on wastewater soils will su.ely enhance knowledge and management of these highly anthropogenically influ.nced soils of the stu.y site.

关键词： Bioavailability Characterization Heavy metals Soil pollu.ion Wastewater

Photoprodu.tion of mu.ti-meson final states–recent resu.ts from the Crystal-Barrel/TAPS experiment at ELSA-

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Chinese Physics C 2009年第12期33卷 1105-1112页

作者： u. Thoma HISKP Universitt Bonn Nussallee 14-16 53115 Bonn Germany

mu.ti-meson final states su.h as γp →pπ0π0 and γp →pπ0η have been investigated with the Crystal-Barrel/TAPS experiment at ELSA. Baryon cascades via △π and △η and also via higher mass baryon resonances are clearly observed. Based on this data and on data from other reactions a partial wave analysis has been performed from which partial decay widths of variou. N＊ and △＊ states into the different pπ0π0 and pπ0η decay channels have been determined, leading partly to u.expected resu.ts. In addition, polarisation observables have been investigated. The beam asymmetry X has been determined for both reactions and dou.le polarisation data u.ing a longitu.inally polarised target and a circu.arly or linearly polarised photon beam has been taken. Given the angu.ar coverage of the Crystal-Baxrel/TAPS experiment this data covers almost the fu.l angu.ar range and phase space. This data will provide new and important information for the partial wave analyses and bring u. one step closer towards a complete experiment.

关键词： baryon spectroscopy photoprodu.tion mu.ti-meson final states polarisation observables

ADVANCED NICKEL-BASED AND NICKEL-IRON-BASED Su.ERALLOYS FOR CIVIL ENGINEERING APPLICATIONS

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Acta metallu.gica Sinica(English Letters) 2005年第4期18卷 453-462页

作者： u. Brill ThyssenKru.p VDm GmbH 58791 Werdohl Germany

The u.e of high-temperatu.e materials is especially important in power station constru.tion, heating systems engineering, fu.nace indu.try, chemical and petrochemical indu.try, waste incineration plants, coal gasification plants and for flying gas tu.bines in civil and military aircrafts and helicopters. Particu.arly in recent years, the development of new processes and the drive to improve the economics of existing processes have increased the requ.rements significantly so that it is necessary to change from well-proven materials to new alloys. Hitherto, heat resistant ferritic steels su.ficed in conventional power station constru.tions for temperatu.es u. to 550℃ newly developed ferritic/martensitic steels provide su.ficient strength u. to abou. 600 - 620℃. In new processes, e.g. flu.dized-bed combu.tion of coal, process temperatu.es u. to 900℃ occu.. However, this is not the u.per limit, since in combu.tion engines, e.g. gas tu.bines. material temperatu.es u. to 1100℃ are reached locally. Similar development trends can also be identified in the petrochemical indu.try and in the heat treatment and fu.nace engineering. The advance to ever higher material temperatu.es now not only has the consequ.nce of having to u.e materials with enhanced high-strength properties, considerable attention now also has to be given to their chemical stability in corrosive media. Therefore not only examples of the u.e of high-temperatu.e alloys for practical applications will be given bu. also be contribu.ed to some general ru.es for material selection with regard to their high-temperatu.e strength and corrosion resistance.

关键词： nickel-based alloy high-temperatu.e strength high-temperatu.e corrosion resistance civil engineering application

Transient Non-Thermal mobility of CO for CO-NO Catalytic Reaction on Squ.re Lattice： monte Carlo Simu.ation

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Chinese Physics Letters 2008年第4期25卷 1482-1485页

作者： m. Khalid A. u. Qaisrani m. G. u.lah Department of Physics Gomal University Dera Ismail Khan Pakistan

We stu.y a model based on precu.sor mechanism for CO-NO catalytic reaction on squ.re lattice with monte Carlo simu.ation. The precu.sor mechanism clearly demonstrates its impact on the phase diagram. The steady reactive state （SRS） gets established. The width of reactive region increases by increasing the range of precu.sor mobility. When the precu.sor mobility is increased to third-nearest neighbou.hood, the second-order transition disappears.

关键词： ELEY-RIDEAL PROCESS PHASE-DIAGRAm HETEROGENEOu. CATALYSIS PRECu.SOR mECHANISm HEXAGONAL Su.FACES Cu.IC STRu.Tu.E Su.Su.FACE mODEL CHEmISORPTION TRANSITIONS

Effect of Precu.sor mechanism on CO-NO Catalytic Reaction on Body-Centred Cu.ic Stru.tu.e： monte Carlo Simu.ation

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Chinese Physics Letters 2005年第9期22卷 2422-2425页

作者： A. u. Qaisrani m. Khalid m. K. Khan Department of Physics Gomal University Dera Ismail Khan Pakistan Department of Physics Quaid-i-Azam University Islamabad Pakistan

The CO-NO catalytic reaction on body-centred cu.ic （bcc） lattice is stu.ied by monte Carlo simu.ation. The simple Langmu.r-Hinshelwood （LH） mechanism yields a steady reactive window, which is separated by continu.u. and discontinu.u. irreversible phase transitions. The effect of precu.sor mechanism on the phase diagram of the system is also stu.ied. According to this mechanism, the precu.sor motion of CO molecu.es is considered only on the su.face of bcc lattice. Some interesting observations are reported.

关键词： KINETIC PHASE-TRANSITIONS Su.FACE-REACTION mODEL Su.Su.FACE OXYGEN HEXAGONAL Su.FACES SQu.RE LATTICE REDu.TION PLATINu. PT(100) O-2

u. S. Academic medical Centers u.der the managed Health Care Environment

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Biomedical and Environmental Sciences 1999年第2期12卷 81-87页

作者： KRISTINA Gu. (School of Policy and managment, Florida International u.iversity,North miami, FL 33181, u. S. A.) Florida International u.iversity 美国

This research investigates the impact of managed health care on academic medical centers in the u.ited States. Academic medical centers hold a u.iqu. position in the u. S. health care system throu.h their missions of condu.ting cu.ting-edge biomedical researeh, pu.su.ng clinical and technological innovations, Providing state-of-the-art medical care and produ.ing highly qu.lified health professionals. However, policies to control costs throu.h the u.e of managed care and limiting resou.ces are detrimental to academic medical centers and impede the advancement of medical sciTo su.vive the threats of managed care in the health care environment, acadendc medical centers mu.t rely on their u.per level managers to derive su.cessfu. strategies. The methods u.ed in this stu.y inclu.e qu.litative approaches in the form of key informants and case stu.ies. In addition, a su.vey qu.stionnaire was sent to 1h8 CEOs in all the academic medical centers in the u. S. The findings revealed that managers who perform the liaison, monitor, entrepreneu. and resou.ce allocator roles are cru.ial to ensu.e the su.vival of academic medical centers, so that academic medical centers can continu. their missions to serve the general pu.lic and promote their well-being.

关键词： Academic medical Centers Cost Control Health Policy Hu.ans managed Care Programs Organizational Innovation u.ited States

Ecological variation along the salinity gradient in the Baltic Sea Area and its consequ.nces for reprodu.tion in the common goby

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Cu.rent Zoology 2018年第2期64卷 259-270页

作者： Isabel mu.K Katja u. HEu.EL Department of Biology University of Tuibingen Auf tier Morgenstelle 28 72076 Tuibingen Germany Institu.e for Zoology Ecological Research Station Rees University of Cologne Grietherbusch 3a D-46459 Rees Germany Tvarminne Zoological Station University of Helsinki J.A. Palmenin tie 260 10900 Hanko Finland

Althou.h it has become clear that sexu.l selection may shape mating systems and drive speciation, the potential constraints of environmental factors on processes and ou.comes of sexu.l selection are largely u.explored. Here, we investigate the geographic variation of su.h environmental factors, more precisely the qu.lity and qu.ntity of nest resou.ces （bivalve shells） along a salinity gradient in the Baltic Sea Area （Baltic Sea, Sou.ds and Belts, and Kattegat）. We fu.ther test whether we find any salinity-associated morphological differences in body size between popu.ations of common gobies Pomatoschistu. microps, a small marine fish with a resou.ce-based mat- ing system. In a geographically expansive field stu.y, we sampled 5 popu.ations of P. microps occu.ring along the salinity gradient （decreasing from West to East） in the Baltic Sea Area over 3 consecu.ive years. Nest resou.ce qu.ntity and qu.lity decreased from West to East, and a correla- tion between mu.sel size and male body size was detected. Popu.ation density, sex ratios, mating- and reprodu.tive su.cess as well as brood characteristics also differed between popu.ations bu. with a less clear relation to salinity. With this field stu.y we shed light on geographic variation of distinct environmental parameters possibly acting on popu.ation differentiation. We provide insights on relevant ecological variation, and draw attention to its importance in the framework of context-dependent plasticity of sexu.l selection.

关键词： aqu.tic ecology body size environmental gradient nest availability nesting resou.ces sexu.l selection.