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A Six-Year Rev.ew of Caesarean Sections at the Federal Teaching Hospital Abakaliki, Ebonyi State, South East Nigeria

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Open Journal of Obstetrics and Gynecology 2020年第12期10卷 1669-1676页

作者： Johnbosco E. Mamah Obiora G. Asiegbu Uzoma v. Asiegbu Kenneth C. Ekwedigwe Ugochukwu U. Nnadozie Lov. Okafor Obstetrics and Gynaecology Department Alex Ekwueme Federal University Teaching Hospital Abakaliki Nigeria Paediatrics Department Alex Ekwueme Federal University Teaching Hospital Abakaliki Nigeria Div.sion of Plastic Surgery Department of Surgery Alex Ekwueme Federal University Teaching Hospital Abakaliki Nigeria

Background: Globally, the rise in the rate of caesarean section is becoming a public health problem. This study examined the rate, indications and complications of caesarean section at the Federal Teaching Hospital Abakaliki (FETHA). Subjects and Methods: This was a six-year retrospective study covering January 1st 2012 to December 31st 2017. Patients who met the inclusion criteria were identified from the theatre records and their case notes retrieved from the health information unit of the hospital. Information extracted includes sociodemographic data, indications and types of caesarean section performed and the complications. Data was collected using a structured proforma and entered into a secured personal computer. Data analysis was performed by means of Epi Info version 7. Results are presented in tables, means and simple percentages. Results: During this period, a total of 11,215 deliveries were recorded at FETHA, of these, 3908 were delivered by CS giving a caesarean section rate of 34.8%. The mean age of the study subjects was 29.3 ± 5.03 years. Almost half (49.7%) of the patients were in the 20 - 29 age group. Multiparous women made up 36.0% while nulliparous women were 12.6%. The most common indication for an emergency caesarean section was v.rdana;">failure

关键词： Abakaliki Caesarean Section Rate Maternal Mortality Perinatal Mortality

The electrolyte comprising more robust water and superhalides transforms Zn-metal anode rev.rsibly and dendrite-free

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Carbon Energy 2021年第2期3卷 339-348页

作者： Chong Zhang Woochul Shin Liangdong Zhu Cheng Chen Joerg C.Neuefeind Yunkai Xu Sarah I.Allec Cong Liu Zhixuan Wei Aigerim Daniyar Jia‐Xing Jiang Chong Fang P.alex Greaney Xiulei Ji Key Laboratory of Applied Surface and Colloid Chemistry(Shaanxi Normal Univ.rsity) Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'anShaanxiChina Department of Chemistry Oregon State UniversityCorvallisOregon Spallation Neutron Source Oak Ridge National LaboratoryOak RidgeTennessee Materials Science and Engineering University of CaliforniaRiversideCalifornia Argonne National Laboratory Chemical Sciences and Engineering DivisionLemontIllinois

A great challenge for all aqueous batteries,including Zn-metal batteries,is the parasitic hydrogen ev.lution reaction on the low-potential ***,we report the formula of a highly concentrated aqueous electrolyte that mitigates hydrogen ev.lution by transforming water molecules more *** electrolyte comprises primarily ZnCl_(2) and LiCl as an additiv.,both of which are inexpensiv. *** O-H cov.lent bonds in water get strengthened in a chemical env.ronment that has fewer hydrogen bonding interactions and a greater number of Zn-Cl superhalides,as suggested by integrated characterization and *** a result,the av.rage Coulombic efficiency of zincmetal anode is raised to an unprecedented>99.7%at 1mA cm^(−2).In the new electrolyte,the plating/stripping processes leav. the zinc-metal anode dendrite-free,and the zinc-metal anode deliv.rs stable plating/stripping cycles for 4000 hours with an areal capacity of 4 mAh cm^(−2) at 2mA cm^(−2).Furthermore,the high Coulombic efficiency of zinc-metal anode in the ZnCl_(2)-LiCl mixture electrolyte is demonstrated in full cells with a limited *** v.(2)O_(5)·H_(2)O||Zn full cell with an N/P mass ratio of 1.2 deliv.rs a stable life of more than 2500 cycles,and the LiMn_(2)O_(4)||Zn hybrid cell with an N/P mass ratio of 0.6 exhibits 1500 cycles in its stable life.

关键词： LiCl rev.rsibility stability water-in-salt electrolyte Zn anode ZnCl_(2)

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千万别撞

汽车测试报告 2007年第2期 90-91页

作者： Bill Yhomas alex P（图）

在纽博格林惨遭不测的首辆阿斯顿·马丁v. N24刚一修好，我们立刻就拿到了钥匙。不过最好还是悠着点儿开，是这么回事吧？

关键词：纽博格林阿斯顿·马丁v. N24 汽车赛车安全

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适合于v.v.用的先进RF滤波器

汽车制造业 2017年第17期 44-45页

作者： Robert Aigner Connie MacKenzie alex Zajac Qorv.公司

本文将探讨有体声波（BAW）滤波器技术的3个关键挑战：DSRC频段中的802．11p、LTE与Wi-Fi共存和卫星无线电，还会讨论与汽车应用有关的可靠性和温度稳定性。

关键词： RF滤波器汽车应用 Wi-Fi 温度稳定性 C频段 DSR 体声波无线电

基于分子电子传感器技术可用于行星探测的微型地震仪

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世界地震译丛 2014年第5期45卷 109-114页

作者： H.Huang B.Carande R.Tang J.Oiler D.Zaitsev.v.agafonov H.Y.Yu 孙宏志赵龙梅卢山刘一萌高业欣吕春来不详辽宁省地震局

描述了一种基于分子电子传感器(MET)技术的微型机械地震计的研制过程。不同于固体惯性质量,分子电子传感器地震计是探测液体电解质相对于固定电极的移动。使用微机电系统技术将探测单元的内部尺寸减小到1μm并且提高了设备的再现性。对6... 详细信息

描述了一种基于分子电子传感器(MET)技术的微型机械地震计的研制过程。不同于固体惯性质量,分子电子传感器地震计是探测液体电解质相对于固定电极的移动。使用微机电系统技术将探测单元的内部尺寸减小到1μm并且提高了设备的再现性。对600mv.工作偏置电压,在0.32Hz的400μg(g≡9.81m/s2)加速度条件下可测得灵敏度为809v.(m/s2)。在1Hz获得的噪声水平为-115dB(相对于(m/s2)/Hz^(1/2))。这项工作研发了一个可供选择小尺寸、高灵敏度、低本底噪声、高振动范围和独立安装角度的地震计设备。这有希望成为下一代行星探测用的地震仪。

关键词：传感器技术行星探测分子电子微型机械地震仪微机电系统技术电子传感器高灵敏度

Agonist-directed sorting of β2-adrenergic receptor signaling and its therapeutic implication in heart

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郑州大学学报(医学版) 2000年第1期35卷 37-45页

作者： ZHANG Shengjun,XIAO Ruiping,ZHOU Yingying,Meike Kuschel,XIA Xianmin,Richard A.Bond ,Olga v.Fedorov.,alex Y.Bagrov.C.Wiuiam Balke,Edward G.Lakatta,CHEN Heping Laboratory of Cardiov.scular Science ,Gerontology Research Center,NIA,NIH,Baltimore,MD 21224

Cardiac β 2 adrenergic receptor (AR) dually couples to G s and to pertussis toxin(PTX) sensitiv. G i proteins ,resulting in opposing effects on cell *** we show that the coupling preference of β 2AR to the bifurcated signaling pathways,tested ov.r wide ranges of agonist concentrations and receptor densities,is determined by agonist *** β 2AR agonists including zinterol,procaterol or salbutamol activ.te concurrent G s and G i signaling in both rat and mouse v.ntricular myocytes,as ev.denced by a marked potentiating effect of PTX on contractile ***,howev.r ,sorts the β 2AR primarily to G s signaling,as ev.denced by the lack of effect of *** results were observ.d in transgenic mice ov.rexpressing human β *** cells from failing rat hearts where the contractile response to zinterol was sev.rely depressed due to an up regulation of G i,fenoterol,which activ.tes G s bypassing the G i signaling pathway,rescued the diminished β 2AR ***,agonist directed sorting of receptor stimulus affords a nov.l therapeutic strategy to enhance desired “signaling specific”effects while av.iding adv.rse side effects of therapeutic agents.

关键词： adrenergic beta receptor agonists G protein toxins cell contra-ctihty

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鲁昂音乐厅及展览中心

城市环境设计 2016年第1期 114-119页

作者： Bernard Tschumi Peter Cornell Megan Miller Joel Rutten Kim Starr Roderick v.llafranca Robert Holton v.ronique Descharrèires alex Reid Christina Dev.zzi Laurane Ponsonnet Kev.n Collins

这座音乐厅及展览中心被视为促进鲁昂区经济文化发展的重要市政设施。它坐落于城市的门户地带,距离巴黎只有一个半小时的车程。7 000个座席的音乐厅、面积达7 000m2的展厅以及一系列开放空间构成了富有冲击力的当代形象,为区域经济文化... 详细信息

这座音乐厅及展览中心被视为促进鲁昂区经济文化发展的重要市政设施。它坐落于城市的门户地带,距离巴黎只有一个半小时的车程。7 000个座席的音乐厅、面积达7 000m2的展厅以及一系列开放空间构成了富有冲击力的当代形象,为区域经济文化的复苏添砖加瓦。声学上的要求促成了音乐厅双层表皮的建筑语言。内

关键词：鲁昂展览中心公共建筑音乐厅建筑物

Wireless,battery-free,and fully implantable electrical neurostimulation in freely mov.ng rodents

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Microsystems & Nanoengineering 2021年第4期7卷 127-138页

作者： alex Burton Sang Min Won Arian Kolahi Sohrabi Tucker Stuart Amir Amirhossein Jong Uk Kim Yoonseok Park Andrew Gabros John A.Rogers Flav.a v.tale Andrew G.Richardson Philipp Gutruf Department of Biomedical Engineering University of ArizonaTucsonAZ 85721USA Department of Electrical and Computer Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Department of Neurosurgery Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA 19104USA Querrey Simpson Institute for Bioelectronics Northwestern UniversityEvanstonIL 60208USA Center for Bio-Integrated Electronics Northwestern UniversityEvanstonIL 60208USA Department of Mechanical Engineering Northwestern UniversityEvanstonIL 60208USA Department of Biomedical Engineering Northwestern UniversityEvanstonIL 60208USA Department of Materials Science and Engineering Northwestern UniversityEvanstonIL 60208USA Department of Neurological Surgery Feinberg School of MedicineNorthwestern UniversityChicagoIL 60611USA Department of Neurology BioengineeringPhysical Medicine&RehabilitationCenter for Neuroengineering and TherapeuticsUniversity of PennsylvaniaPhiladelphiaPA 19104USA Bio5 Institute and Neuroscience GIPP University of ArizonaTucsonAZ 85721USA Department of Electrical and Computer Engineering University of ArizonaTucsonAZ 85721USA

Implantable deep brain stimulation(DBS)systems are utilized for clinical treatment of diseases such as Parkinson's disease and chronic ***,long-term efficacy of DBS is limited,and chronic neuroplastic changes and associated therapeutic mechanisms are not well *** and mechanistic inv.stigation,typically accomplished in small animal models,is difficult because of the need for chronic stimulators that currently require either frequent handling of test subjects to charge battery-powered systems or specialized setups to manage tethers that restrict experimental paradigms and compromise *** ov.rcome these challenges,we demonstrate a fully implantable,wireless,battery-free platform that allows for chronic DBS in rodents with the capability to control stimulation parameters digitally in real *** dev.ces are able to prov.de stimulation ov.r a wide range of frequencies with biphasic pulses and constant v.ltage control v.a low-impedance,surface-engineered platinum *** dev.ces utilize off-the-shelf components and feature the ability to customize electrodes to enable broad utility and rapid *** of the system is demonstrated with a readout of stimulation-ev.ked neural activ.ty in v.v. and chronic stimulation of the medial forebrain bundle in freely mov.ng rats to ev.ke characteristic head motion for ov.r 36 days.

关键词： stimulation battery mov.ng