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Defence Technology（防务技术） 2019年第4期15卷 545-556页

作者： S.ajith Arul Daniel R.Pugazhenthi R.Kumar S.Vijayananth Department of Mechanical Engineering Vels Institute of ScienceTechnology and Advanced Studies

This study aims to optimize the input parameters such as mass fraction and particle size of SiC along with depth of cut,feed and cutting speed in the milling of Al5059/SiC/*** hybrid metal matrix composites are generally fabricated by reinforcing of different sizes(10,20,40 μm)of SiC with aluminium at a different levels(5%,10%& 15%)whereas the MoS2 addition is fixed as 2%.The effect of each control factor on response variables are analyzed through Taguchi S/N ratio ***,the most significant method for prediction of response parameters is satisfied by ANN model than the regression *** of variance(ANOVA)results envisage that mass fraction of SiC,feed rate is the most domineering factor on response variable.

关键词： Silicon carbide Temperature Surface roughness Cutting forces Artificial neural network Grey relational analysis

Distortion product otoacoustic emissions in newborn babies with and without late-term maternal iron deficiency anaemia

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journal of Otology 2023年第3期18卷 132-138页

作者： Deepashree Somanahalli Ramachandra ajith Kumar Uppunda Kumar Gavali Suryanarayana Vivekananda Memorial Hospital A Unit of Swami Vivekananda Youth Movement(SVYM)Hanchipura RoadSaragurSaragur TalukMysuru DistrictKarnataka571121India All India Institute of Speech and Hearing(AIISH) ManasagangothriMysuruKarnataka570006India

Background:Studies on animals have demonstrated that maternal iron deficiency anaemia(IDA)could result in decreased cochlear sensory hair cells and reduced amplitudes of distortion-product otoacoustic emissions(DPOAEs)of young guinea ***,it is essential to study the functioning of cochlear hair cells using DPOAEs in human newborn babies with maternal *** current study explores maternal IDA’s effect on DPOAEs in newborn ***:A total of 110 newborn babies with gestational age≥34 weeks were considered and a‘betweensubjects’design was *** participants were divided into 3 groups-“Normal”(61 babies without maternal IDA),“Mild”(28 babies with mild maternal IDA)and“Moderate”(21 babies with moderate maternal IDA).The cord blood was collected and the DPOAEs were recorded for each baby for a range of frequencies(1 k 8 kHz)and a range of intensities(7040 dB SPL in 10 dB steps).Results:The analysis of both DP-gram and DP input-output(I/O)function showed that there was no significant difference(p>0.05)across the normal,mild,and moderate groups in the overall presence of DPOAEs as well as the amplitude across frequencies or intensities(7040 dB SPL).Also,the overall correlation of RBC indices with DPOAE amplitude across frequencies as well as the slope of the I/O function showed no ***:The current study concludes that there is no effect of late-term maternal IDA on the DPOAEs of newborn babies.

关键词： Maternal iron deficiency anaemia Newborn babies Distortion product otoacoustic emissions Cochlear hair cell functioning Red blood cell indices Haemoglobin

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高温燃料气脱硫过程的最佳设计

煤炭转化 1984年第4期 28-35页

作者： j.thomas Schrodt,吕玉茀美国肯塔基大学化学工程系

本文提出了一种高温气体脱硫法,此法有效地利用了煤炭气化炉废渣中的氧化铁与煤转化成的燃料气中的H2S、COS和CS2反应并吸附之。过程于填充床反应器中,在1033K和2.22兆帕（斯加）条件下进行。硫化了的废渣可以反复再生,由此产生克分子比... 详细信息

本文提出了一种高温气体脱硫法,此法有效地利用了煤炭气化炉废渣中的氧化铁与煤转化成的燃料气中的H2S、COS和CS2反应并吸附之。过程于填充床反应器中,在1033K和2.22兆帕（斯加）条件下进行。硫化了的废渣可以反复再生,由此产生克分子比为30/70的S2和SO2的混合物,它适宜于完全还原成元素硫或制造硫酸。最佳化分析预示:用填充高为0.61米的浅床反应器,按脱硫生产时间仅0.37小时的周期程序操作。这样,显著地降低投资和生产费。一座处理1.22百万标米3/小时、含H2SO.63克分子%的燃料气的工厂预计需投资7.638百万美元（1981年价）和年生产费5.229百万美元。一座回收副产品SO2为硫酸的标准工厂预计需另加投资11.38百万美元,但可得税前利润10.46百万美元（硫酸售价80美元/吨）。这一巨大利润反映了副产品SO2的价值。

关键词：固定床反应器最佳设计投资美元填充床反应器最优设计财政管理本位币脱硫过程吸附剂气体燃料燃料气

Surgical techniques for the management of male infertility

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Asian journal of Andrology 2012年第1期14卷 94-102,177页

作者： Natalya A Lopushnyan thomas j Walsh Department of Urology University of Washington Seattle WA 98195 USA

Evaluation and surgical treatment of male infertility has evolved and expanded, now leading to more precise diagnoses and tailored treatments with diminished morbidity and greater success. Surgeries for male infertility are divided into four major categories：（i） diagnostic surgery; （ii） surgery to improve sperm production; （iii） surgery to improve sperm delivery; and （iv） surgery to retrieve sperm for use with in vitrofertilization and intracytoplasmic sperm injection （IVF-ICSI）. While today we are more successful than ever in treating male infertility, pregnancy is still not always achieved likely due to factors that remain poorly understood. Clinicians treating infertility should advocate for couple-based therapy, and require that both partners have a thorough evaluation and an informed discussion before undergoing specific surgical therapies.

关键词： male infertility testis varicocele

Outcomes of critically ill children with pre-existing mental health conditions

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Pediatric Investigation 2024年第2期8卷 108-116页

作者： Conrad Krawiec Morgan Cash Gary Ceneviva Zizhong Tian Shouhao Zhou Neal j.thomas Department of Pediatrics Pediatric Critical Care MedicinePenn State Hershey Children's HospitalPennsylvaniaUSA Department of Public Health Sciences Division of Biostatistics and BioinformaticsPennsylvania State University College of MedicinePennsylvaniaUSA Department of Public Health_Sciences Pennsylvania State University College of MedicinePennsylvaniaUSA

Importance:Critically ill children with pre-existing mental health conditions may have an increased risk of poor health ***:We aimed to evaluate if pre-existing mental health conditions in critically ill pediatric patients would be associated with worse clinical outcomes,compared to children with no documented mental health ***:This retrospective observational cohort study utilized the TriNetX electronic health record database of critically ill subjects aged 12-18 *** were analyzed for demographics,pre-existing conditions,diagnostic,medication,procedural codes,and ***:From a dataset of 102027 critically ill children,we analyzed 1999 subjects(284[14.2%]with a pre-existing mental health condition and 1715[85.8%]with no pre-existing mental health condition).Multivariable analysis demonstrated that death within one year was associated with the presence of pre-existing mental health conditions(odds ratio 8.97[3.48-23.15],P<0.001),even after controlling for the presence of a complex chronic ***:The present study demonstrates that the presence of pre-existing mental health conditions was associated with higher odds of death within 1 year after receiving critical ***,the confidence interval was wide and hence,the findings are *** studies with a larger sample size may be necessary to evaluate the true long-term impact of children with pre-existing mental health conditions who require critical care services.

关键词： Critical care Psychiatry Psychology Public health

A survey on future research about electron beam welding for aerospace applications

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China Welding 2018年第1期27卷 60-64页

作者： ajith Raj Rajendran Dev Anand Manoharan Department of Aeronautical Engineering Noorul Islam Centre for Higher EducationKanyakumari 629180India Noorul Islam Centre for Higher Education Kanyakumari 629180India

Electron beam welding plays an important role in the aerospace industry where components like sensors,gears,actuators and air frames used in aircraft and rocket engines were welded using this *** is normally performed in a vacuum to avoid the scatter of electron due to the presence of gas molecules in the atmosphere and hence electron beam welding process provides the greater *** still joining of dissimilar metals is *** paper represents review of process,generation and distribution of heat source various input parameters,materials,microstructure,mechanical strength and the possibilities of joining dissimilar metals using electron beam welding.

关键词： dissimilar metal joints electron beam welding mechanical strength microstructure

Theory and classification of mass extinction causation

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National Science Review 2024年第1期11卷 16-36页

作者： thomas j.Algeo jun Shen State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences—Wuhan State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences—Wuhan Department of Geosciences University of Cincinnati

Theory regarding the causation of mass extinctions is in need of systematization, which is the focus of this contribution. Every mass extinction has both an ultimate cause, i.e. the trigger that leads to various climato-environmental changes, and one or more proximate cause(s), i.e. the specific climato-environmental changes that result in elevated biotic mortality. With regard to ultimate causes, strong cases can be made that bolide(i.e. meteor) impacts, large igneous province(LIP) eruptions and bioevolutionary events have each triggered one or more of the Phanerozoic Big Five mass extinctions, and that tectono-oceanic changes have triggered some second-order extinction events. Apart from bolide impacts, other astronomical triggers(*** flares, gamma bursts and supernova explosions) remain entirely in the realm of speculation. With regard to proximate mechanisms, most extinctions are related to either carbon-release or carbon-burial processes, the former being associated with climatic warming, ocean acidification, reduced marine productivity and lower carbonate δ13C values, and the latter with climatic cooling, increased marine productivity and higher carbonate δ13C values. Environmental parameters such as marine redox conditions and terrestrial weathering intensity do not show consistent relationships with carbon-cycle *** this context, mass extinction causation can be usefully classified using a matrix of ultimate and proximate factors. Among the Big Five mass extinctions, the end-Cretaceous biocrisis is an example of a bolide-triggered carbon-release event, the end-Permian and end-Triassic biocrises are examples of LIP-triggered carbon-release events, and the Late Ordovician and Late Devonian biocrises are examples of bioevolution-triggered carbon-burial events. Whereas the bolide-impact and LIP-eruption mechanisms appear to invariably cause carbon release, bioevolutionary triggers can result in variable carbon-cycle changes, e.g. carbon burial durin

关键词： biocrisis ultimate cause proximate cause bolide large igneous province bioevolutionary event

Foreword： varicocele - unraveling the enigma

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Asian journal of Andrology 2016年第2期18卷 159-160页

作者： Anthony j.thomas Cleveland Clinic Lerner College of Medicine of CaseWestern University Cleveland Ohio USA.

It was more than 40 years ago, as a first-year Urology resident, that I performed my first varicocele ligation （a palomo procedure under the watchful eye and able hands of my staff physician. I dutifully read all I could the night before the procedure and became familiar with the names of Barfield, Macomber and Sanders, Tulloch, MacLeod, Ivanissevich, Palomo, Amelar and Dubin and others who had written about varicoceles being associated with abnormal semen parameters and a potentially surgically correctable cause of male infertility.

关键词： Foreword varicocele - unraveling the enigma

The terminology of the 2012 Atlanta consensus conference on post-inflammatory collections after acute pancreatitis:An assessment of utilization in practice

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Hepatobiliary & Pancreatic Diseases International 2022年第5期21卷 508-510页

作者： Santhalingam jegatheeswaran Louise M Finch Maya C Siriwardena ajith K Siriwardena Regional Hepato-Pancreato-Biliary Surgery Unit Manchester Royal InfirmaryOxford RoadManchester M139WLUK Warwick Medical School WarwickUK Faculty of Biology Medicine and HealthUniversity of ManchesterManchesterUK

To the Editor The report of the 1992 Atlanta consensus conference provided a framework for standardization of the terminology for description of acute pancreatitis and its complications[1].Terms such as“pancreatic phlegmon”which had historically been subjected to differential interpretation were discontinued and modern terminology was introduced[1].With subsequent clinical usage and with the accrual of new knowledge it became clear that further changes were necessary.

关键词： pancreatitis acute terminology

Synthesis and electronic properties of expanded 5-(hetero)arylthien-2-yl substituted 3-ethynyl quinoxalines with AIE characteristics

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Science China Chemistry 2018年第8期61卷 909-924页

作者： Franziska K.Merkt thomas j.j.Müller Institute of Organic Chemistry and Macromolecular Chemistry Heinrich Heine University Düsseldorf

Expanded 5-(hetero)aryl-thien-2-yl substituted 3-ethynyl quinoxaline dyes with variable substitution pattern on the peripheral thiophene ring were synthesized in moderate to very good yields by Suzuki and Buchwald-Hartwig coupling of the corresponding brominated 3-ethynyl quinoxalines. Dumbbell-shaped bis(thienyl 3-ethynyl quinoxalines) are also accessible by the Suzuki protocol. The photophysical properties were investigated by UV and fluorescence spectroscopy. Most of the obtained compounds display fluorescence in solution and some of them also in the solid state. Additionally, tuning of the emission color of the quinoxaline based chromophores can be conveniently accomplished by the remote substituent group. The determined absorption and emission maximum as well as the Stokes shifts strongly correlate with Hammett σp+parameters. Besides,photophysical properties of selected derivatives in the solid state, biphasic solutions, and PMMA films, along with their relationships, are comparatively investigated. Moreover, two 5-(hetero)aryl-thien-2-yl substituted 3-ethynyl quinoxaline dyes are aggregation induced emission(AIE) chromophores indicated by restriction of molecular motions. A covalently restricted 3-ethynyl quinoxaline supports that the inhibition of molecular rotation is responsible for the significant enhancement of fluorescence in acetonitrile/water mixtures.

关键词： absorption aggregation induced emission cross-coupling fluorescence heterocycles palladium