检索结果-南通市图书馆

Double balloon device compared to oxytocin for induction of labour after previous caesarean section

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Obstetrics and Gynecology 2013年第1期3卷 212-216页

作者： Estefanía Rodríguez Ferradas Izaskun lasa alvarado Miren Arrue Gabilondo Irene Diez-Itza José García-Adanez Departament of Obstetrics and Gynecology Asturias Central Hospital Oviedo Spain Departament of Obstetrics and Gynecology Donostia Hospital San Sebastián Spain

Objective: To assess cervical changes, duration of oxytocin infusion, mode of delivery and complications after cervical ripening using a double balloon device in women with a previous caesarean section. Methods: longitudinal study including 80 women with a previous caesarean section, no previous vaginal delivery and an unfavourable cervix (Bishop

关键词： Double Balloon Device Induction labor Vaginal Birth after Caesarean Cervical Ripening

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

秘鲁—中国铁矿石贸易运输研究

秘鲁—中国铁矿石贸易运输研究

作者：夏谙特(Armando Zarate alvarado) 大连海事大学

学位级别：硕士

秘鲁具有丰富的矿产资源,是世界12大矿产国家之一。中国和秘鲁从1971年建交以来,在经济、外交、能源合作等方面都建立了非常好的关系,目前中国和秘鲁已经成为全面的战略伙伴关系。在1993-2013年间中国与秘鲁的进出口贸易额增长了75倍。2... 详细信息

秘鲁具有丰富的矿产资源,是世界12大矿产国家之一。中国和秘鲁从1971年建交以来,在经济、外交、能源合作等方面都建立了非常好的关系,目前中国和秘鲁已经成为全面的战略伙伴关系。在1993-2013年间中国与秘鲁的进出口贸易额增长了75倍。2009年中国与秘鲁签署了自由贸易协定,目前中国已经成为秘鲁最大的贸易伙伴和出口市场。秘鲁与中国的货物贸易中,铁矿石贸易占有非常重要的地位。2014年中国与秘鲁的铁矿石贸易量为104万吨左右,是中国的第9大铁矿石进口国家,未来中国和秘鲁的铁矿石贸易也具有较好的发展前景。然而秘鲁目前在国内和国际的运输方面存在一定的问题,制约了中国和秘鲁铁矿石贸易的发展。因此,预测秘鲁-中国的铁矿石贸易出口量,分析秘鲁到中国的铁矿石运输市场情况以及运输能力,明确目前秘鲁与中国铁矿石贸易运输存在的主要问题,提出提升中国-秘鲁铁矿石贸易运输水平的对策具有重要的意义。本文首先分析秘鲁-中国铁矿石贸易相关背景及贸易运输的研究现状,本文的主要内容以及研究思路。然后分析秘鲁铁矿石的出口状况以及秘鲁与中国铁矿石贸易的状况,在此基础上本文选择了趋势外推模型对未来五年秘鲁与中国的铁矿石贸易量进行了预测,对比未来中国与秘鲁铁矿石贸易量的发展及秘鲁国内及国际运输的状况,分析了影响秘鲁-中国铁矿石贸易运输的主要因素以及运输能力,最后,针对两国的铁矿石贸易运输水平的提升提出了具体的对策建议。

关键词：秘鲁采矿业中国铁矿石出口贸易运输分析

Numerical Simulation of the Blood Flow through a Brain Vascular Aneurysm with an Artificial Stent Using the SPH Method

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Engineering（科研） 2018年第12期10卷 891-912页

作者： leonardo Di G. Sigalotti Jaime Klapp Karla Pedroza Edgar Nathal Carlos E. alvarado-Rodríguez Area of Physics of Irreversible Processes Department of Basic Sciences Autonomous Metropolitan University-Azcapotzalco (UAM-A) Mexico City Mexico Physics Department National Institute of Nuclear Research (ININ) Ocoyoacac Mexico los Cabos H+ Hospital San José del Cabo Mexico National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez” Mexico City Mexico Departament of Chemical Engineering DCNyE University of Guanajuato Guanajuato Mexico

We present numerical simulations of blood flow through a brain vascular aneurysm with an artificial stent using Smoothed Particle Hydrodynamics (SPH). The aim of this work is to analyze how the flow into an aneurysm changes using different stent configurations. The initial conditions for the simulations were constructed from angiographic images of a real patient with an aneurysm. The wall shear stresses, pressure and highest velocity within the artery, and other particular quantities are calculated which are of medical specific interest. The numerical simulations of the cerebral circulation help doctors to determine if the patient’s own vascular anatomy has the conditions to allow arterial stenting by endovascular method before the surgery or even evaluate the effect of different stent structure and materials. The results show that the flow downstream the aneurysm is highly modified by the stent configuration and that the best choice for reducing the flow in the aneurysm is to use a completely extended Endeavor stent.

关键词： Brain Vascular Flow Aneurysms Blood Flow Particle Methods Numerical Modeling

Effects of anatomical position on esophageal transit time:A biomagnetic diagnostic technique

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2008年第37期14卷 5707-5711页

作者： Teodoro Cordova-Fraga Modesto Sosa Carlos Wiechers Jose Maria De la Roca-Chiapas Alejandro Maldonado Moreles Jesus Bernal-alvarado raquel Huerta-Franco Instituto de Física Universidad de GuanajuatoLeón 37150 Gto. Mexico Instituto de Investigaciones sobre el Trabajo Universidad de GuanajuatoLeón 37150 Gto. Mexico

AIM： To study the esophageal transit time （ETT） and compare its mean value among three anatomical inclinations of the body; and to analyze the correlation of ETT to body mass index （BMI）. METHODS： A biomagnetic technique was implemented to perform this study：（1） The transit time of a magnetic marker （MM） through the esophagus was measured using two fluxgate sensors placed over the chest of 14 healthy subjects; （2） the EIF was assessed in three anatomical positions （at upright, fowler, and supine positions; 90°, 45° and 0°, respectively）. RESUlTS： ANOVA and Tuckey post-hoc tests demonstrated significant differences between E-IT mean of the different positions. The ETT means were 5.2 ± 1.1 s, 6.1 ± 1.5 s, and 23.6 ± 9.2 s for 90°, 45° and 0°, respectively. Pearson correlation results were r = -0.716 and P 〈 0.001 by subjects＇ anatomical position, and r = -0.024 and P 〉 0.05 according the subject＇s BMI. CONClUSION： We demonstrated that using this biomagnetic technique, it is possible to measure the ETT and the effects of the anatomical position on the ETT.

关键词： Transit time Magnetic marker Esophagus Anatomical position Non-invasive

哥斯达黎加Tortugal 89Ma科马提岩岩套:暗示着加勒比和东太平洋地区形成于一个地幔柱这同一地质成因

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

海洋地质动态 1997年第10期 22-24页

作者： GuillermoE.alvarado 韩新霞

哥斯达黎加Ｔｏｒｔｕｇａｌ８９Ｍａ科马提岩岩套：暗示着加勒比和东太平洋地区形成于一个地幔柱这同一地质成因ＧｕｉｌｅｒｍｏＥ．Ａｌｖａｒａｄｏ等科马提岩原用于描述太古代超镁铁质火山岩。唯一一个证实科马提拉班玄武岩序列的... 详细信息

哥斯达黎加Ｔｏｒｔｕｇａｌ８９Ｍａ科马提岩岩套：暗示着加勒比和东太平洋地区形成于一个地幔柱这同一地质成因ＧｕｉｌｅｒｍｏＥ．Ａｌｖａｒａｄｏ等科马提岩原用于描述太古代超镁铁质火山岩。唯一一个证实科马提拉班玄武岩序列的显生宙标本出现在哥伦比亚乔治那岛（...

关键词：科马提岩岩套地幔柱地质成因太平洋地区

Evaluation of a point of care ultrasound curriculum for Indonesian physicians taught by fi rst-year medical students

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Emergency Medicine 2017年第4期8卷 281-286页

作者： Jonathan B.lee Christina Tse Thomas Keown Michael louthan Christopher Gabriel Alexander Anshus Bima Hasjim Katrina lee Esther Kim luke Yu Allen Yu Shadi lahham Steven Bunch Maili alvarado Abdulatif Gari John C.Fox School of Medicine University of CaliforniaIrvineUSA Department of Emergency Medicine University of CaliforniaIrvineOrangeCalifornia 92868USA

BACKGROUND: The purpose of this study was to assess the short-term efficacy of a 4-week ultrasound curriculum taught by American first-year medical students to general practitioners working in public health care clinics, or puskesmas, in Bandung, ***: We performed a prospective, observational study of Indonesian health care practitioners from public clinics in Bandung, Indonesia. These practitioners were enrolled in a 4-week ultrasound training course taught by first-year American medical students. A total of six sessions were held comprising of 38 ultrasound milestones. A pre-course and post-course written exam and practical exam was taken by each ***: We enrolled 41 clinicians in the course. The average pre-course exam score was 35.2% with a 2.4% pass rate, whereas the average post-course exam score was 82.0% with a 92.7% pass rate. The average practical score at the completion of the course was 83.2%(SD=0.145) with 82.9% of the class passing(score above 75.0%).CONClUSION: Our data suggests that first-year medical students can effectively teach ultrasound to physicians in Indonesia using a 4-week intensive ultrasound training course. Future studies are needed to determine the amount of training required for proficiency and to evaluate the physicians' perceptions of the student-instructors' depth of knowledge and skill in point of care ultrasound.

关键词： Ultrasound education Ultrasound teaching Indonesia

Borehole Heat Budget Calculator: A New Tool for the Quick Exploitation of High-Resolution Temperature Profiles by Hydrogeologists

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2019年第2期11卷 122-147页

作者： Guillaume Meyzonnat Florent Barbecot José Antonio Corcho alvarado Jean-Marc lauzon Renald McCormack Antoine Tognelli Hermann Zeyen Marina Alazard Geotop-UQAM Department of Earth and Atmospheric Sciences Montreal Canada Spiez laboratory Federal Office for Civil Protection Spiez Switzerland TechnoRem Inc. Laval Canada Envir’Eau-Puits Inc. Levis Canada CEA DAM DIF F-91297 Arpajon France Department of Earth Sciences GEOPS Laboratory Paris-Saclay University Paris-Sud University CNRS Orsay France

Distributed temperature sensing is known to provide sharp signals which are very efficient for mapping hydraulically active fractures in wellbores. High-resolution temperature sensing has specifically demonstrated its capacity to characterize very low flows in wellbores. But as sharp as they can be, temperature profiles are often difficult to decipher. The aim of the present work is to provide and to test the “Borehole Heat Budget Calculator” (BHB Calculator), which is implemented as a fast and easy to use tool for the quantitative analysis of depth-temperature profiles. The Calculator is suitable for most pumping and draining configurations, as the heat budget is generalized for modelling multidirectional flow systems within the same wellbore. The formatted worksheet allows the quick exploitation of temperature logs, and is applicable for the characterization of distributed fractures in long screened wellbores. Objectives of the heat modelling are to enhance the readability of complex depth-temperature data, as well as to quantify distribution of inflow intensities and temperatures with depth. The use of heat budget helps to clearly visualize how heat conduction and heat advection contributions are distributed along wellbores profiles. Calculations of inflow temperatures and their evolution through pumping duration is a prerequisite to infer about the nature of aquifer properties (i.e. conduits, distributed or discrete fractures, porous media), as well as to give insight information about the mapping of effective flow paths draining the aquifer. The efficiency and limitations of the BHB Calculator are being tested through high-resolution temperature logging, along with complementary flowmetering and televiewing logging in fractured aquifers located in the St-lawrence lowlands, Quebec, Canada.

关键词： Fractured Bedrock Aquifer High-Resolution Temperature logging Heat Budget Modelling long Screened Wellbores

Evaluation of the Finnish Diabetes Risk Score to predict type 2 diabetes mellitus in a Colombian population: A longitudinal observational study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Diabetes 2015年第17期6卷 1337-1344页

作者： Diego Gomez-Arbelaez laura alvarado-Jurado Miguel Ayala-Castillo leonardo Forero-Naranjo Paul Anthony Camacho Patricio lopez-Jaramillo Dirección de Investigaciones Clínica de Síndrome Metabólico Prediabetes y Diabetes Fundación Oftalmológica de Santander - FOSCAL Instituto de Investigaciones MASIra Facultad de Medicina Universidad de Santander - UDES División de Endocrinología Escuela de Medicina Universidad de Santiago de Compostela Escuela de Medicina Universidad Autónoma de Bucaramanga

AIM: To assess the performance of the Finnish Diabetes Risk Score(FINDRISC) questionnaire for detecting and predicting type 2 diabetes mellitus(DM2) in a Colombian ***: This is a longitudinal observational study conducted in Floridablanca, Colombia. Adult subjects(age ≥ 35 years) without known diabetes, were included. A modified version of FINDRISC was completed, and the glycemia values from all the subjects were collected from the hospital's database. Firstly, a cross-sectional analysis was performed and then, the subsample of prediabetic participants was followed for diabetes incidence. RESUlTS: A total of 772 subjects were suitable for the study. The overall prevalence of undiagnosed DM2 was 2.59%, and the incidence of DM2 among the prediabetic participants was 7.5 per 100 person-years after a total of 265257 person-years follow-up. The FINDRISC at baseline was significantly associated with undiagnosed and incident DM2. The area under receiver operating characteristics curve of the FINDRISC score for detecting undiagnosed DM2 in both men and women was 0.7477 and 0.7175, respectively; and for predicting the incidence of DM2 among prediabetics was 71.99% in men and 67.74% in women. CONClUSION: The FINDRISC questionnaire is a useful screening tool to identify cross-sectionally unknown DM2 and to predict the incidence of DM2 among prediabetics in the Colombian population.

关键词： Finnish diabetes risk score Type 2 diabetes mellit

Business Architecture： A Case Study of a Medium Enterprise in Mexico

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

通讯和计算机（中英文版） 2014年第1期11卷 22-29页

作者： Alicia Valdez Menchaca Sergio Castaneda alvarado Gloria Campos Posada Alma Domfnguez lugo Alicia Silva Avila Samuel Hernandez Donjuan Research Center Faculty of Engineering Mechanical and Electrical University Autonomous of Coahuila Coahuila Mexico Academic Unit Computer Systems Faculty of Engineering Mechanical and Electrical University Autonomous of CoahuilaCoahuila Mexico