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Case Reports in Clinical Medicine 2024年第7期13卷 227-233页

作者： Arja Alemu Nathan ross Department of Obstetrics and Gynecology AGC Tenwek Hospital Bomet Kenya Department of Obstetrics and Gynecology Soddo Christian Hospital Soddo Ethiopia

Background: Vaginal discharge syndrome is a common condition across the world with the main causes being infectious. Rare causes include obstructed hemivagina with ipsilateral renal agenesis (OHVIRA syndrome). Case Presentation: This case involves an 18-year-old woman with a 9-year history of vaginal discharge treated unsuccessfully by multiple physicians and different health facilities. After she presented to our hospital gynecology clinic with the same complaint she investigated with blood, urine, discharge wet-mount, pelvic ultrasound, and abdominopelvic computed tomography at different times. Preoperatively she was suspected to have OHVIRA syndrome which was successfully surgically treated with a full return of function. Conclusion: This case emphasizes the need to consider non-infectious causes commonly congenital mullerian anomaly in young women presented with long-time vaginal discharge symptoms soon after menarche and which are nonresponding to different multiple medical treatments. In peripheral health institutions like ours, it is best to consider computed tomography if available but better not to forget at least abdominopelvic ultrasound to look for congenital Mullerian anomalies.

关键词： OHVIRA syndrome Vaginal Discharge syndrome Early Marriage

symptom presentation and evolution in the first 48 hours after injury are associated with return to play after concussion in elite Rugby Union

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Journal of sport and Health science 2024年第3期13卷 387-397页

作者： ross Tucker Matt Cross Keith stokes Lindsay starling Rosy Hyman simon Kemp stephen West Martin Raftery Eanna Falvey James Brown Institute of sport and Exercise Medicine(IsEM) Department of ExerciseUniversity of StellenboschTygerberg 7505South Africa World Rugby Ltd. Dublin D02 AE93Ireland Premiership Rugby London SW1V 1PXUK Centre for Health and Injury and Illness Prevention in SportUniversity of BathClaverton Down BA27AYUK UK Collaborating Centre on Injury and Illness Prevention in sport(UKCCIIs) University of BathClaverton Down BA27AYUK Rugby Football Union London TW27BAUK London school of Tropical Medicine London WC1E 7HTUK sport Injury Prevention Research Centre Faculty of KinesiologyUniversity of CalgaryCalgary T2N 1N4Canada Department of Medicine School of Medicine and HealthUniversity College CorkCork T12 EC8PIreland Carnegie Applied Rugby Research(CARR)centre Carnegie School of SportLeeds Beckett UniversityLeeds LS63QSUK

Background:Return to play(RTP)in elite rugby is managed using a 6-stage graduated RTP protocol,which can result in clearance to play within 1 week of *** aimed to explore how symptom,cognitive,and balance presentation and evolution during concussion screens 2 h(head injury assessment(HIA2)and 48 h(HIA3)after injury were associated with time to RTP)to identify whether a more conservative graduated RTP may be ***:A retrospective cohort study was conducted in 380 concussed rugby players from elite men’s rugby over 3 consecutive *** were classified as shorter or longer returns,depending on whether RTP occurred within 7 days(allowing them to be considered to play the match 1 week after injury)or longer than 8 days,***,cognitive,and balance performance during screens was assessed relative to baseline(normal or abnormal)and to the preceding screen(improving or worsening).Associations between sub-test abnormalities and RTP time were explored using odds ratios(OR,longer ***).Median day absence was compared between players with abnormal or worsening results and those whose results were normal or ***:Abnormal symptom results during screens 2 h and 48 h after concussion were associated with longer return time(HIA2:OR=2.21,95%confidence interval(95%CI):1.39-3.50;HIA3:OR=3.30,95%CI:1.89-5.75).Worsening symptom number or severity from the time of injury to 2 h and 48 h post-injury was associated with longer return(HIA2:OR=2.49,95%CI:1.36-4.58;HIA3:OR=3.34,95%CI:1.10-10.15).Median days absence was greater in players with abnormal symptom results at both HIA2 and *** and balance performance were not associated with longer return and did not affect median days ***:symptom presentation and evolution within 48 h of concussion were associated with longer RTP *** may guide a more conservative approach to RTP,while still adhering to individualized concussion management principles.

关键词： Brain injury Concussion management General return to play Medical management

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完美数及其相关问题

数学进展 2024年第4期53卷 673-689页

作者：蔡天新 Tyler ross 浙江大学数学科学学院杭州浙江310058

完美数问题是最古老的数学问题之一,可能来源于古希腊的毕达哥拉斯学派,被意大利当代数学家奥迪弗雷迪列为面向21世纪的“四大数学难题”之首.本文对古老的完美数问题及相关的梅森素数进行综述,尤其是对其拓展为平方完美数、立方完美数... 详细信息

完美数问题是最古老的数学问题之一,可能来源于古希腊的毕达哥拉斯学派,被意大利当代数学家奥迪弗雷迪列为面向21世纪的“四大数学难题”之首.本文对古老的完美数问题及相关的梅森素数进行综述,尤其是对其拓展为平方完美数、立方完美数及s-完美数以后所产生的问题进行了综述.

关键词：完美数平方完美数立方完美数 s-完美数

The Effect of Retinoic Acid on Neutrophil Innate Immune Interactions With Cutaneous Bacterial Pathogens

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Infectious Microbes & Diseases 2024年第2期6卷 65-73页

作者： Alexandra stream ross Corriden simon Döhrmann Richard L.Gallo Victor Nizet Ericka L.Anderson Division of Host-Microbe systems and Therapeutics Department of PediatricsUniversity of California San Diego School of MedicineLa JollaCaliforniaUSA Department of Dermatology University of California San Diego School of MedicineLa JollaCaliforniaUSA skaggs school of Pharmacy and Pharmaceutical sciences University of California San DiegoLa JollaCaliforniaUSA

Vitamin A and its biologically active derivative,retinoic acid(RA),are important for many immune ***,in particular,is essential for the development of immune cells,including neutrophils,which serve as a front-line defense against *** vitamin A deficiency has been linked to higher susceptibility to infections,the precise role of vitamin A/RA in host-pathogen interactions remains poorly ***,we provided evidence that RA boosts neutrophil killing of methicillin-resistant staphylococcus aureus(MRsA).RA treatment stimulated primary human neutrophils to produce reactive oxygen species,neutrophil extracellular traps and the antimicrobial peptide cathelicidin(LL-37).Because RA treatment was insufficient to reduce MRsA burden in an in vivo murine model of skin infection,we expanded our analysis to other infectious *** did not affect the growth of a number of common bacterial pathogens,including MRsA,Escherichia coli K1 and Pseudomonas aeruginosa;however,RA directly inhibited the growth of group A streptococcus(GAs).This antimicrobial effect,likely in combination with RA-mediated neutrophil boosting,resulted in substantial GAs killing in neutrophil killing assays conducted in the presence of ***,in a murine model of GAs skin infection,topical RA treatment showed therapeutic potential by reducing both skin lesion size and bacterial *** findings suggest that RA may hold promise as a therapeutic agent against GAs and perhaps other clinically significant human pathogens.

关键词： retinoic acid neutrophil bacterial infection staphylococcus aureus group A streptococcus neutrophil extracellular traps antimicrobial peptide cathelicidin

Laser-direct-drive program: Promise, challenge, and path forward

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Matter and Radiation at Extremes 2017年第2期2卷 37-54页

作者： E.M.Campbell V.N.Goncharov T.C.sangster s.P.Regan P.B.Radha R.Betti J.F.Myatt D.H.Froula M.J.Rosenberg I.V.Igumenshchev W.seka A.A.solodov A.V.Maximov J.A.Marozas T.J.B.Collins D.Turnbull F.J.Marshall A.shvydky J.P.Knauer R.L.McCrory A.B.sefkow M.Hohenberger P.A.Michel T.Chapman L.Masse C.Goyon s.ross J.W.Bates M. Karasik J.Oh J.Weaver A.J.schmitt K.Obenschain s.P.Obenschain s.Reyes B.Van Wonterghem Laboratory for Laser Energetics University of RochesterRochesterNYUSA Lawrence Livermore National Laboratory LivermoreCAUSA Naval Research Laboratory WashingtonDCUSA

Along with laser-indirect(X-ray)-drive and magnetic-drive target concepts,laser direct drive is a viable approach to achieving ignition and gain with inertial confinement *** the United states,a national program has been established to demonstrate and understand the physics of laser direct *** program utilizes the Omega Laser Facility to conduct implosion and coupling physics at the nominally 30-kJ scale and lasereplasma interaction and coupling physics at the MJ scale at the National Ignition *** article will discuss the motivation and challenges for laser direct drive and the broad-based program presently underway in the United states.

关键词： Inertial fusion Direct drive Laser interactions Hydrodynamics Omega National ignition facility

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“虚拟骨骼”的性别和年龄估测的可行性研究

国际医学放射学杂志 2009年第2期32卷 205-205页

作者： s.Grabherr C.Cooper s.Ulrich-Bochsler T.Uldin s.ross L.Oesterhelweg 刘靖 Institute of Forensic Medicine University Hospital of Lausanne

本文介绍了多层CT（MDCT）估测死者骨龄和性别的可行性研究。为获得虚拟骨骼。用特殊方案对22例已知死亡年龄的死者进行多层CT扫描，包括头颅、肩胛骨（包括肱骨上段）、耻骨联合和股骨上段的高分辨率成像。骨与软组织进行了二维和三维... 详细信息

本文介绍了多层CT（MDCT）估测死者骨龄和性别的可行性研究。为获得虚拟骨骼。用特殊方案对22例已知死亡年龄的死者进行多层CT扫描，包括头颅、肩胛骨（包括肱骨上段）、耻骨联合和股骨上段的高分辨率成像。骨与软组织进行了二维和三维的重建。3名具不同专业经验的人类学家对所测得的数据进行了分析。

关键词：骨龄年龄估计性别估计虚拟骨骼虚拟解剖数字化骨骼学

Effect of Eu3+,Bi3+,and Li+ doping on luminescent property of GdNbO4

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Journal of Rare Earths 2024年第1期42卷 66-75页

作者： s.W.Wi Y.s.Lee Department of Physics and Integrative Institute of Basic sciences Soongsil University

We investigated the emission properties of Eu3+-doped GdNbO4-based oxide phosphors,aiming at improving the Eu3+emission by codoping of Bi3+and Li+.Eu3+singly doped,Eu3+and Bi3+doubly doped,and Eu3+,Bi3+,and Li+triply doped GdNbO4were prepared using a high-temperature solid-state reaction *** red-orange emissions from Eu3+in the singly doped samples are significantly improved by the codoping of Bi3+,mainly due to the energy transfer from Bi3+to Eu3+.The additional codoping of Li+is found to increase the Eu3+emission *** improvement might be attributed to the increase in the photoluminescent quantum yield originating from larger grain sizes and better crystallinity.A detailed analysis of the X-ray diffraction pattern and the asymmetric ratio estimated from the photoluminescence spectra show that the local lattice environment around Eu3+in GdNbO4does not change significantly with the codoping of Bi3+and Li+.Our results indicate that Li+doping is a promising way to improve the emission properties of rare-earth ion-doped GdNbO4phosphors.

关键词： Eu 3+ GdNbO 4 Codoping of Li + Photoluminescence sensitizer Rare earths

First evidence for chiral wobbling of triaxial nuclei

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Nuclear science and Techniques 2024年第7期35卷 4-7页

作者： s.Frauendorf Department of Physics and Astronomy University of Notre DameNotre DameIN 46556USA

Chirality(Greek“handiness”)is a property of many com-plex *** molecules exist in two forms,one being the mirror image of the *** for our hands,it is impossible to make the images identical by a suitable *** two forms are called left-handed and *** have the same binding energy,because the electro-magnetic interaction,which holds the molecule together,does not change under a *** properties that are insensitive to the geometry are also the *** different geometry is the reason why the left-handed form turns the polarization plane of transmitted light in one direction by some angle while the right-handed form turns it in the oppo-site direction by the same ***,the geometrical differences between the two species may have other *** two species of the carvon molecule shown in Fig.1 taste quite differently.

关键词： turns Chiral mirror

Tribological behavior of lubricant-impregnated porous polyimide

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Friction 2024年第4期12卷 711-725页

作者： Jinbang LI Ningning ZHOU Janet s.s.WONG school of Mechanical Engineering and Mechanics Ningbo UniversityNingbo 315211China Beijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms Beijing Institute of Control EngineeringBeijing 100029China Department of Mechanical Engineering Imperial College LondonLondon SW72AZUK

Porous materials impregnated with lubricants can be used in conditions where limited lubricant is *** this work,three porous polyimides(PPI)with different densities were ***(PAO)impregnated PPI(iPPI)discs were rubbed against steel and sapphire *** operando observations of the iPPI-sapphire contacts show that oil is released under an applied load,forming a meniscus around *** at the outlet is created at high sliding *** amount of released oil increases with increasing PPI *** moduli,E*,estimated based on the actual contact size show that trapped oil in iPPIs contributes to load *** higher speeds,tribological rehydration of the contact occurs in low density iPPI,with that E*rises with *** high density PPIs,high speeds give a constantly high E*which is limited by the viscoelastic properties of the PPI network and possibly the rate of oil *** of iPPI-steel contacts is governed by the mechanical properties of the PPI,the flow of the lubricant,and the roughness of the PPI *** low-and medium-density(highly porous,high roughness)PPIs,large amount of oil is released,and lubrication is mainly via lubricant restricted in the contact in the pores and possibly tribological *** high density(low porosity)PPI,with lower roughness,hydrodynamic lubrication is achieved which gives the lowest *** results show that polymeric porous materials for effective lubrication require the optimization of its surface roughness,stiffness,oil flow,and oil retentions.

关键词： polyimide porous material friction mechanism polymer limited lubrication

Enhancing fatigue performance of AZ31 magnesium alloy components fabricated by cold metal transfer-based wire arc directed energy deposition through LPB

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Journal of Magnesium and Alloys 2024年第4期12卷 1638-1662页

作者： shambhu Kumar Manjhi srikanth Bontha A.s.s.Balan Department of Mechanical Engineering National Institute of Technology KarnatakaSurathkalSrinivasanagarMangaloreKarnataka 575025India

Cold Metal Transfer-Based Wire Arc Directed Energy Deposition(CMT-WA-DED)presents a promising avenue for the rapid fabrication of components crucial to automotive,shipbuilding,and aerospace ***,the susceptibility to fatigue of CMT-WA-DED-produced AZ31 Mg alloy components has impeded their widespread adoption for critical load-bearing *** this study,a comprehensive investigation into the fatigue behaviour of WA-DED-fabricated AZ31 Mg alloy has been carried out and compared to commercially available wrought AZ31 *** findings indicate that the as-deposited parts exhibit a lower fatigue life than wrought Mg alloy,primarily due to poor surface finish,tensile residual stress,porosity,and coarse grain microstructure inherent in the WA-DED *** Plasticity Burnishing(LPB)treatment is applied to mitigate these issues,which induce significant plastic deformation on the *** treatment resulted in a remarkable improvement of fatigue life by 42%,accompanied by a reduction in surface roughness,grain refinement and enhancement of compressive residual stress ***,during cyclic deformation,WA-DED specimens exhibited higher plasticity and dislocation density compared to both wrought and WA-DED+LPB specimens.A higher fraction of Low Angle Grain Boundaries(LAGBs)in WA-DED specimens contributed to multiple crack initiation sites and convoluted crack paths,ultimately leading to premature *** contrast,wrought and WA-DED+LPB specimens displayed a higher percentage of High Angle Grain Boundaries(HAGBs),which hindered dislocation movement and resulted in fewer crack initiation sites and less complex crack paths,thereby extending fatigue *** findings underscore the effectiveness of LPB as a post-processing technique to enhance the fatigue performance of WA-DED-fabricated AZ31 Mg alloy *** study highlights the importance of LPB surface treatment on AZ31 Mg components produced by CMT-WA-DED to remove surface d

关键词： Wire arc additive manufacturing AZ31 Mg alloy Low plasticity burnishing Low cycle fatigue test strain amplitude