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现代世界伦理学新趋向

plasticity Analysis of Nano—Grain—Sized NiAl Alloy in an Atomic Scale

1990年

作者： j.p.·德马科(j.p. Demarco) R.M.·福克斯(R.M. Fox)

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Chinese physics Letters 2002年第1期19卷 105-107页

作者：王京阳 j.Rifkin 等 ShenyangNationalLaboratoryforMaterialsScience InstituteofMetalResearchChineseAcademyofSciencesShenyang110016 InstituteofMaterialsScience UniversityofConnecticutUSA

The molecular dynamics method is used to simulate a uniaxial tensile deformation of 3.8nm nano-NiAl alloy with curved amorphous-like interfaces at 0K. plastic deformation behaviour is studied by examining the strain-stress relationship and the microstructural evolution characteristics. Atomic level analysis has shown that the micro-strain is essentially heterogeneous in simulated nano-phase samples. The plastic deformation is not only attributed to the plasticity of interfaces, but also accompanied with the plastic shear strain mechanism inside lattice distortion regions and grains.

关键词： plastic deformation

Nasopharyngeal colonization of otopathogens in South Indian children with acuteotitis media -- A case control pilot study

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journal of Otology 2021年第4期16卷 220-224页

作者： M.Napolean V.Rosemol M.john A.M.Varghese j.periyasamy V.Balaji p.Naina Department of ENT Christian Medical CollegeVelloreTamil NaduIndia Department of Clinical Microbiology Christian Medical CollegeVelloreIndia

Background: Acute otitis media (AOM) is an inflammatory disease of the middle ear causing significantmorbidity in early childhood. A pilot study was undertaken to identify the role of various risk factorsSouth Indian children with AOM, especially the role of nasopharyngeal ***: A prospective case control pilot study was conducted in children aged below six years,presenting to a single tertiary care from 2018 to 2019. Fifty cases with AOM and 45 age and gendermatched controls were recruited. Two nasopharyngeal swabs were collected, one was processed forbacterial culture. The other swab was processed according to the CDC recommended broth enrichmentmethod to identify carriage of S. pneumoniae. Subsequent serotyping was done by Quellung method andconventional sequential multiplex ***: Otalgia was the major presentation seen in 92% of the children with AOM. None of the clinical anddemographic characteristics were found to be statistically significant between the cases and controls. Themost common otopathogen was S. pneumoniae (55%) followed by H. influenza (29%). The commonS. pneumoniae serotypes encountered were 11A and *** colonization with S. pneumoniae[OR 6.57, p p p pharyngeal colonization ofotopathogens and AOM as a risk factor that is enhanced by co-colonization.S. pneumoniae was the mainotopathogen in this population, serotypes 11A and 19F being the most common.

关键词： Acute otitis media Nasopharyngeal Otopathogens Case control study Streptococcus pneumoniae Haemophilus influenzae Moraxella catarrhalis Staphylococcus aureus

Fabrication of SAW Sensor for Detecting Chemical Agent

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稀有金属材料与工程 2006年第A3期35卷 433-435页

作者： j H Lee B S joo j S Huh D D Lee School of Electronic & Electrical Engineering Kyungpook National UniversityKorea Dept.of Materials Science and Metallurgy Kyungpook National UniversityKorea

SAW sensors using five different types of polymer to detect of chemical agents(DMMp,CH_3CN,CH_2Cl_2,DCp) have been fabricated and its gas response characteristics were extensively *** polymers used as the sensing material are polyisobutylene(pIB),polyepichlorohydrin(pECH),polydimethylsiloxane(pDMS),polyisoprene(pIp)and polybutadiene(pBD).Their thin films were coated on quartz substrate by spin coating *** types of simulants gases,dimethylmethylphosphonate(DMMp),acetonitrile(CH_3CN)and dichloromethane(CH_2Cl_2),dichloropentane(DCp)were used as target gases,instead of the real nerve,blood,choking and vesicant *** spin coating of pIB and pECH,the substrates were heated to 65℃with N_2 flow for 1 h to remove the cyclohexane and ethylacetate which was used as solvent. pDMS was heated to 75℃with N_2 flow for 2 h to remove the ethylacetate which was used as *** and pIp on the substrate were heated to 60℃with N_2 flow for 1 h to remove the benzen which was used as *** sensing characteristics of the SAW sensors were measured by using E-5061A network analyzer.

关键词： SAW DMMp CH3CN CH2Cl2 DCp polymer film

DISSOLUTION KINETICS OF pHOSpHATE ORE IN ACIDIC SOLUTIONS

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Chinese journal of Chemical Engineering 1994年第2期2卷 13-22页

作者：马三剑 E.T.M.j.Martynowicz G.j.Witkamp G.M.vanRosmalen Faculty of Chemical Technology and Material Science Delft University of TechnologyLeeghwaterstraat 442628RZ DelftThe Netherlands

1 INTRODUCTIONIn the wet processes of industrial phosphoric acid production,sedimentary or francolitephosphate ore dissolves in mineral *** the acid is sulphuric acid,which is a classic wetprocess,the crystallization of calcium sulphate *** rate of crystallization is normallyconsidered quite slower than that of *** only few publications have

关键词： dissolution kinetics phosphate ore diffusion mechanically stripping hydrogen calcium ions concentration shrinking core model

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护士共情疲劳及应对策略的质性研究

International journal of Nursing Sciences 2022年第4期9卷 467-480页

作者： Natália Ondrejková júlia Halamová Institute of Applied psychology Faculty of Social and Economic SciencesComenius University in BratislavaMlynske Luhy 482105BratislavaSlovakia

目的护士存在共情疲劳的风险,这会影响他们的个人和职业生活。本研究旨在调查导致中欧护士共情疲劳的压力来源、他们的共情疲劳体验以及应对策略。方法通过社交网站招募来自中欧的86名护士。通过网络问卷进行资料收集,问卷包括关于共情... 详细信息

目的护士存在共情疲劳的风险,这会影响他们的个人和职业生活。本研究旨在调查导致中欧护士共情疲劳的压力来源、他们的共情疲劳体验以及应对策略。方法通过社交网站招募来自中欧的86名护士。通过网络问卷进行资料收集,问卷包括关于共情疲劳的压力因素、体验和应对策略的开放式问题。基于Figley关于共情疲劳的理论,应用理论性主题分析法对资料进行分析。多次读取原始资料,识别重复出现的陈述。然后将每个陈述归类到不同维度、子维度、类别和子类别。结果研究结果表明了中欧护士共情疲劳的压力因素、体验和应对策略与Figley所确定的共情疲劳的认知、情感、行为、身体、人际关系、精神和工作相关症状的关联。结论本研究详细总结了中欧护士共情疲劳的压力因素、体验和应对策略,可为开发早期筛查工具和干预措施提供参考,以缓解护士共情疲劳,并对医疗保健系统进行预防性调整。

关键词：共情疲劳应对自我照顾护士质性研究适应,心理学

Study of the Adhesion of Clinical Strains of Staphylococcus aureus on an Abiotic Surface Using the Biofilm Ring Test^(█)

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journal of Biomaterials and Nanobiotechnology 2012年第4期3卷 547-556页

作者： j.M.Liesse Iyamba N.B.Takaisi-Kikuni S.Dulanto j.p.Dehaye Laboratoire de Chimie biologique et medicale et de Microbiologie pharmaceutique Faculte de PharmacieUniversite libre de BruxellesBrusselsBelgium Laboratoire de Microbiologie Experimentale et pharmaceutique Facultedes Sciences Pharmaceu-tiquesUniversite de KinshasaDemocratic Republic of Congo

Four methicillin-sensitive (MSSA) and 4 methicillin-resistant (MRSA) strains of Staphylococcus aureus were collected and isolated at the Laboratory of Bacteriology of the provincial General Reference Hospital of Kinshasa in the Democratic Republic of Congo. The microbial adhesion to solvents (MATS) test showed that the MRSA strains had a less hydrophobic membrane than the MSSA strains. Using the Biofilm Ring Test? (BFRT?) to investigate on the adhesion of these bacterial strains to smooth surfaces, we observed that the MSSA strains adhered more rapidly than the MRSA strains. The biomass of the produced biofilm measured by the Crystal violet staining method (CVSM) was more important with MSSA than with MRSA strains. Ethylene glycol-bis(2-aminoethylether)-N,N,N',N'-tetraacetic acid (EGTA) inhibited the adhesion and the formation of a biofilm by MRSA strains;this inhibition was reversed by calcium, magnesium and manganese. The MRSA strains adhered less to silicon tubing and the adhesion was inhibited by EGTA in 2 of the 4 MRSA strains and none of the MSSA strains. In conclusion, the MSSA and MRSA strains adhered on an abiotic surface and formed a biofilm at distinct rates and with different sensitivities to ions. The results also confirm the utility as well as the limits of the BFRT? to study the adhesion of bacteria on a surface.

关键词： Biofilm Ring Test^(█) Crystal Violet Cell Surface Hydrophobicity Adhesion Catheter Tube

Feasibility study applied to mapping tidal effects in the pannonian basin--An effort to check location dependencies atμGal level

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Geodesy and Geodynamics 2018年第3期9卷 237-245页

作者： G.papp j.Benedek p.Varga M.Kis A.Koppan B.Meurers R.Leonhardt M.K.Baracza Geodetic and Geophysical Institute Research Centre for Astronomy and Earth SciencesHungarian Academy of Sciences.9400 SopronHungary Geological and Geophysical Institute of Hungary 1145 BudapestHungary University of Vienna Department of Meteorology and Geophysics1090 WienAustria Zentralanstalt fur Meteorologie and Geodynamik 1190 ViennaAustria University of Miskolc Department of Geophysics3515 Miskolc-EgyetemvarosHungary

This paper summarizes the main instrumental and methodological points of the tidal research which was performed in the framework of the National Scientific Research Fund project K101603. Since the project is still running the tidal analysis results published here are only preliminary. Unmodelled tidal effects have been highlighted in some recent absolute gravity measurements carried out in the pannonian basin resulting in a periodic modulation exceeding the typical standard deviations （±1microGal） of the drop sets. Since the most dominant source of the daily gravity variation is the bulk tidal effect, the goal of the project is to check its location dependency at BGal level. Unfortunately Hungary has had no dedicated instrumentation, so an effort was made to make the available LaCoste- Romberg spring G meters capable for continuous recording. As a reference instrument the GWR SG025 operated in the Conrad Observatory, Austria was also used and in the mean time of the project, a Scintrex CG-5 became also available, Eventually 6 instruments at 5 different locations were operated for 3 9 months mainly in co-located configuration. Although many experiments （moving mass calibrations） were done to determine the scale factors and scale functions of the instruments, the direct comparison of the tidal parameters obtained from the observations is still questionable. Therefore the ratio of the delta factors of O1 and M2 tidal constituents was investigated supposing that M2 is much more influenced by the ocean loading effect than O1. The slight detected increase of δ（O1 ）/δ（M2）（≈0.2%） toward east does not contradict to theory. This result has to be validated in the near future by analyzing available ocean loading models.

关键词： Gravity tide mapping Spring gravity meters Instrumental tests Co-located observations Location dependence of delta factors

EXpERIMENTAL STUDY ON BED SHEAR STRESS AND SEDIMENT TRANSpORT IN A MEANDERING LABORATORY CHANNEL

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International journal of Sediment Research 2002年第1期17卷 1-19页

作者： L. YILMAZ1, Vijay p. SINGH2, S.K. MISHRA3, D. D. ADRIAN2 and j. j. SANSALONE2 1 Civil Engineering Faculty, Hydraulic Division, Technical University of Istanbul, 80626, Maslak, Istanbul, Turkey Civil Engineering Faculty Hydraulic Division Technical University of Istanbul 80626 Maslak Istanbul Turkey Dept. of Civil and Environmental Engineering Louisiana State University Baton Rouge LA 70803-6405 U. S. A. National Institute of Hydrology Roorkee-247 667 Uttaranchal India

An experimental study was carried out to investigate bed shear stress of a flow boundary layer with meandering features and sediment transport in a meandering channel. By measuring the shear stress distribution with hot-film sensors, the stability of the fluid-bed interface and the characteristics of the bed features were investigated experimentally in a laboratory model for free-surface flow over an erodible bed. The experimental results are presented in two parts. First, experimental observations of meander evolution due to inhomogeneous distribution of boundary layer meander features are qualitatively described in terms of the shear stress distribution. Second, an empirical relation is proposed for the shear stress distribution measured with WTG-50 hotfilmanemometer at the wavy iron bed. The sediment transport rate measured in the meandering channel in a laboratory flume was used to evaluate and compare the sediment transport formulae of Shield (1936), meyer-peter and Mller (1948), Einstein (1950), and Bagnold (1966). The sedimentation rates computed using these formulae were found to be generally higher than those observed in the laboratory. However, the Einstein formula yields these rates closest to the measured ones but with an over-prediction of 64.5% in general. Using the experimental observations, empirical formulae were also developed for predicting the sediment transport rate and the meander planforms for a specific condition.

关键词： Bed shear stress Sediment transport Meandering channel Stability Boundary layer