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Dust-Lower-Hybrid Surface Waves in Classical and Degenerate Plasmas

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Communications in Theoretical Physics 2013年第11期60卷 623-629页

作者： m.Ayub H.A.Shah m.N.S.Qureshi m.Salimullah Department of Physics G. C. University Department of Physics Mirpur University of Science and Technology (MUST) Department of Physics Jahangirnagar University

The dispersion relation for general dust low frequency electrostatic surface waves propagating on an interface between a magnetized dusty plasma region and a vacuum is derived by using specular reflection boundary conditions both in classical and quantum regimes. The frequency limit ω ≤ωei ≤ ωce is considered and the dispersion relation for the Dust-Lower-Hybrid Surface Waves （DLHSW＇s） is derived for both classical and quantum plasma half-space and analyzed numerically. It is shown that the wave behavior changes as the quantum nature of the problem is considered.

关键词： dusty plasma lower hybird surface wave degenerate plasma

REGRESSION Of ANTERIOR SEGmENT NEOVASCULARISATION fOLLOWING CAROTID ENDARTERECTOmY IN A PA-TIENT SUffERING fROm OCULAR IS-CHAEmIC SYNDROmE

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国际眼科杂志 2003年第1期3卷 34-35页

作者： C.Gutierrez m.moreno J.m.Hernaez f.munoz Ramon Y Caial Hospital Spain Ramon Y Caial Hospital SpainRamon Y Caial Hospital SpainRamon Y Caial Hospital Spain

Purpose: To report a case of bilateral regression of anterior segment neovascularisation after carotid endarterectomy in a patient with bilateral ocular ischaemic syndrome (OIS). Patient and methods: Case report. A 61 year-old man suffering from bilateral ocular ischaemic syndrome causing iris neovascularisation (NVI) and neovascular glaucoma (NVG), was planned for bilateral panretinal photocoagulation (PRP) and endarterectomy. PRP was technically only possible in his right eye, while endarterectomy was performed in both carotids. Results: Bilateral complete NVI regression was observed a month after surgery. Conclusion: In some OIS uveal ischaemia could be the major responsible for NVI. Carotid endarterectomy benefits patients who have more than 70% stenosis and improves ocular blood flow, so it should be considered in patients suffering OIS with NVI unre- spective of other cerebral ischaemic symptoms.

关键词：双侧眼缺血颈动脉内膜切除术后前段新生血管退化青光眼

Dynamics of Sutterby fluid flow due to a spinning stretching disk with non-fourier/fick heat and mass flux models

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Applied mathematics and mechanics(English Edition) 2021年第9期42卷 1247-1258页

作者： f.mABOOD J.mACKOLIL B.mAHANTHESH A.RAUf S.A.SHEHZAD Department of Information Technology Fanshawe College LondonON N5Y 5R6Canada Department of mathematics CHRIST(Deemed to be University)Bangalore 560029India Department of mathematics COMSATS University IslamabadSahiwal 57000Pakistan

The magnetohydrodynamic Sutterby fluid flow instigated by a spinning stretchable disk is modeled in this *** Stefan blowing and heat and mass flux aspects are incorporated in the thermal *** conventional models for heat and mass flux,i.e.,fourier and fick models,are modified using the Cattaneo-Christov(CC)model for the more accurate modeling of the *** boundary layer equations that govern this problem are solved using the apt similarity *** subsequent system of equations is tackled by the Runge-Kutta-fehlberg(RKf)*** graphical visualizations of the results are discussed with the physical *** rates of mass and heat transmission are evaluated for the augmentation in the pertinent *** Stefan blowing leads to more species diffusion which in turn increases the concentration field of the *** external magnetism is observed to decrease the velocity ***,more thermal relaxation leads to a lower thermal field which is due to the increased time required to transfer the heat among fluid *** heat transport is enhanced by the stretching of the rotating disk.

关键词： Sutterby fluid Stefan blowing Cattaneo-Christov(CC)theory magnetic field rotating stretching disk

Characterization of 1-Aminocyclopropane-1-Carboxylate(ACC) Deaminase-Containing Pseudomonas *** the Rhizosphere of Salt-Stressed Canola

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Pedosphere 2014年第4期24卷 461-468页

作者： A.R.AKHGAR m.ARZANLOU P.A.H.m.BAKKER m.HAmIDPOUR Department of Soil Science Vali-e-Asr University of RafsanjanRafsanjan(Iran) Department of Soil Science University of TabrizTabriz(Iran) Department of Biology Plant-Microbe InteractionsUtrecht UniversityUtrecht(Netherlands)

When exposed to biotic or abiotic stress conditions, plants produce ethylene from its immediate precursor 1-aminocyclopropane-1- carboxylate （ACC）, leading to retarded root growth and senescence. many plant growth-promoting rhizobacteria contain the enzyme ACC deaminase and this enzyme can cleave ACC to form a-ketobutyrate and ammonium, thereby lowering levels of ethylene. The aim of this study was to isolate and characterize ACC deaminase-producing bacteria from the rhizosphere of salt-stressed canola （Brassica napus L.）. Out of 105 random bacterial isolates, 15 were able to utilize ACC as the sole source of nitrogen. These 15 isolates were also positive for indole acetic acid （IAA） production. Phylogenetic analysis based on partial 16S rDNA sequences showed that all isolates belonged to fluorescent Pseudomonas spp. In the canola rhizosphere investigated in this study, Pseudomonas fluorescens was the dominant ACC deaminase-producing species. Cluster analysis based on BOX-AIR-based repetitive extragenic palindromic-polymerase chain reaction （BOX-PCR） patterns suggested a high degree of genetic variability in ACC deaminase-producing P. fluorescens strains. The presence of indigenous ACC-degrading bacteria in the rhizosphere of canola grown in saline soils indicates that these bacteria may contribute to salinity tolerance.

关键词： BOX-AiR-based repetitive extragenic palindromie-polymerase chain reaction (BOX-PCR) ethylene indole acetic acid phylogenetic analysis plant growth-promoting rhizobacteria (PGPR) Pseudomonas fluorescens

Reliability and validation of the Arabic version of the Conditions for Workplace Effectiveness Questionnaire-Ⅱ

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International Journal of Nursing Sciences 2021年第2期8卷 215-220,I0006页

作者： Wafa'a f.Ta'an mohammed m.Al-Hammouri Jehad A.Rababah mohammad m.Suliman Department of Community and mental Health Nursing Faculty of NursingJordan University of Science and TechnologyIrbidJordan Department of Adult Health Nursing Faculty of NursingJordan University of Science and TechnologyIrbidJordan Department of Community and mental Health Nursing Faculty of NursingAl al-Bayt UniversityMafraqJordan

Objective:This study aimed to examine the psychometric properties of the Conditions for Workplace Effectiveness Questionnaire-Ⅱ-Arabic Version(CWEQ-Ⅱ-AV),which measures structural empowerment among *** enhance the usability and credibility of the CWEQ-Ⅱ among researchers within Arabicspeaking countries,a valid and reliable Arabic version of the measure is ***:A cross-sectional research design was *** December 2018 to June 2019,275 nurses working in 4 hospitals participated in the *** was assessed by examining internal consistency and split-half reliability.A confirmatory factor analysis was performed to evaluate the factor structure of the CWEQ-Ⅱ-***:The psychometric properties of the CWEQ-Ⅱ-AV were excellent regarding the six-factor model(opportunity,information,resources,support,formal power,and informal power).The results showed the following fit indices meet the criteria set a priori:comparative fit index(CfI)=0.96,root mean square of error approximation(RmSEA)=0.06,andХ^(2)/df=***'s a coefficient was 0.95 for the total questionnaire and ranged between 0.83 and 0.89 for the individual *** split-half reliability was 0.91 for the total questionnaire and ranged from 0.83 to 0.87 for individual ***:This study provides evidence that CWEQ-Ⅱ-AV is both a reliable and valid measure of structural empowerment among Arab nurses.

关键词： Empowerment Hospital nursing staff Nursing administration research Psychometrics Jordan

Crystal-oriented wrinkles with origami-type junctions in few-layer hexagonal boron nitride

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Nano Research 2015年第5期8卷 1680-1688页

作者： Camilla K. Oliveira Egleidson f. A. Gomes mariana C. Prado Thonimar V. Alencar Regiane Nascimento Leandro m. malard Ronaldo J. C. Batista Alan B. de Oliveira Helio Chacham Ana m. de Paula Bernardo R, A. Neves Departamento de fisica ICEx Universidade Federal de Minas Gerais - UFMG C.P. 702 30123-970 - Belo Horizonte Brazil Departamento de fisica ICEB Universidade Federal de Ouro Preto - UFOP 35400-000 - Ouro Preto Brazil

Understanding layer interplay is the key to utilizing layered heterostructures formed by the stacking of different two-dimensional materials for device applications. Boron nitride has been demonstrated to be an ideal substrate on which to build graphene devices with improved mobilities. Here we present studies on the morphology and optical response of annealed few-layer hexagonal boron nitride flakes deposited on a silicon substrate that reveal the formation of linear wrinkles along well-defined crystallographic directions. The wrinkles formed a network of primarily threefold and occasionally fourfold origami-type junctions throughout the sample, and all threefold junctions and wrinkles formed along the armchair crystallographic direction. furthermore, molecular dynamics simulations yielded, through spontaneous symmetry breaking, wrinkle junction morphologies that are consistent with both the experimental results and the proposed origami-folding model. Our findings indicate that this morphology may be a general feature of several two-dimensional materials under proper stress-strain conditions, resulting in direct consequences in device strain engineering.

关键词： hexagonal boron nitride 2D materials wrinkles origami folding annealing

Twinning in Intermetallic Compounds Are Long Shear Vectors and/or Shuffles Really Necessary?

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Journal of materials Science & Technology 1993年第5期9卷 313-321页

作者： f.m.Chu David P.Pope Dept.of materials Science and Engineering,University of Pennsylvania,Philadelphia,PA 19104,USA

In this paper the geometric description and general theory of mechanical twinning are reviewed, the twins in general lattices and superlattices are summarized, and the kinetic process by which mechanical twins form is revisited. A case study of mechanical twinning of HfV2+Nb, (cubic) Laves phase, is presented and the synchroshear of selected atomic layers is proposed to explain the physical process of twin formation. If the twins form in this way, then long shear vectors and / or atomicshuffles are not really necessary.

关键词： twin intermetallic compounds shear vector shuffles

Comparative carbon emission assessments of recycled and natural aggregate concrete: Environmental influence of cement content

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Geoscience frontiers 2021年第6期12卷 66-75页

作者： marian Sabǎu Dan V.Bompa Luis f.O.Silva Department of Civil and Environmental Engineering Universidad de la Costa080020 BarranquillaColombia Department of Civil and Environmental Engineering University of SurreyGuildford GU27XHUK Departamento de Ingeniería Civil y Arquitectura Universidad de LimaAvenida Javier Prado Este 4600Santiago de Surco 1503Peru

This work examines the environmental and geochemical impact of recycled aggregate concrete production with properties representative for structural *** environmental influence of cement content,aggregate production,transportation,and waste landfilling is analysed by undertaking a life cycle assessment and considering a life cycle inventory largely specific for the *** obtain a detailed insight into the optimum life cycle parameters,a sensitivity study is carried out in which supplementary cementitious materials,different values of natural-to-recycled aggregate content ratio and case-specific transportation distances were *** results show that carbon emissions were between 323 and 332 kgCO_(2)e per cubic metre of cement only natural aggregate *** values can be reduced by up to 17%by replacing 25%of the cement with fly *** contrast,carbon emissions can increase when natural coarse aggregates are replaced by recycled aggregates in proportions of 50%and 100%,and transportation is not included in ***,the concrete with 50%recycled aggregate presented lower increase,only 0.3%and 3.4%for normal and high strength concrete,*** some cases,the relative contribution of transportation to the total carbon emissions increased when cement was replaced by fly ash in proportions of 25%,and case-specific transportation distances were *** absolute values,the concrete mixes with 100%recycled aggregates and 25%fly ash had lower carbon emissions than concrete with cement and natural aggregates *** environmental benefits can be obtained when the transportation distances of fly ash are relatively short(15–25 km)and the cement replacement by fly ash is equal or higher than 25%,considering that the mechanical properties are adequate for practical *** observations from this paper show that recycled aggregate concrete with strength characteristics representative for structural members can have lowe

关键词： Life cycle assessment Recycled aggregate Natural aggregate Transportation distance OpenLCA

Can morphological and behavioral traits predict the foraging and feeding dynamics of social arachnids?

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Current Zoology 2021年第2期67卷 183-190页

作者： Renan f.mOURA Everton TIZO-PEDROSO Kleber DEL-CLARO Laboratório de Ecologia Comportamental e de Interaçōes Instituto de BiologiaUniversidade Federal de UberlândiaUberlândiaMG38402-020Brazil Centro de Ensino e Aprendizado em Rede Universidade Estadual de GoiásAnápolisGO75123-315Brazil

Complex social insect species exhibit task specialization mediated by morphological and behavior-al ***,evidence of such traits is scarce for other social *** investigated whether the social pseudoscorpion Paratemnoides nidificator exhibits morphologically and behav-iorally specialized individuals in prey *** measured body and chela sizes of adult pseudo-scorpions and analyzed predation *** individuals spent more time moving through the colony and foraging than smaller *** that captured prey had increased body and absolute chelae *** larger individuals had relatively small chelae size,they showed a higher probability of prey *** individuals manipulated prey often,although they fed less than smaller *** that initiated captures fed more frequently and for more time than the *** selection might be favoring individuals speci-alized in foraging and colony protection,allowing smaller and less efficient adults to avoid contact with dangerous *** our knowledge,there is incipient information regarding specialized indi-viduals in arachnids,and our results might indicate the emergence of a morphologically special-ized group in this species.

关键词： altruistic species behavioral ecology cooperative species morphological specialization Pseudoscorpiones social arachnids