检索结果-南通市图书馆

Changes in sexual activity in young women during pregnancy

在线全文

学校读者我要写书评

暂无评论

Asian pacific Journal of Reproduction 2024年第5期13卷 213-218页

作者： Ghazal mansouri Mina Zakeri Fatemeh Karami Robati Leila Allahqoli Azam Dehghani Department of Obstetrics and Gynecology School of MedicineAfzalipour HospitalKerman University of Medical SciencesKermanIran Clinical Research Development Unit Afzalipour HospitalKerman University of Medical SciencesKermanIran School of Public Health Iran University of Medical Sciences(IUMS)TehranIran Gastroenterology and Hepatology Research Center Institute of Basic and Clinical Physiology SciencesKerman University of Medical SciencesKermanIran

Objective:To conduct changes in sexual activity during pregnancy and its related factors in pregnant ***:The present descriptive cross-sectional study was conducted in 2017 on pregnant women who referred to the women's clinic of Afzalipour Hospital in the southeast of *** were included in the study through convenient *** data collection tool was a researcher-made questionnaire consisting of two parts of personal social information of the couple and questions to measure the level of sexual activity and the attitude of the subjects during pregnancy compared to before ***:201 Pregnant women were *** average age of pregnant women was(27.3±6.1)years and their average gestational age was(24.7±11.8)*** than 62%of women had decreased sexual *** was a significant relationship between the amount of changes in sexual activity and delivery time(P=0.013),abortion history(P=0.001)and premature birth history(P=0.002).Most pregnant women believed that sex during pregnancy caused damage to the fetus(67.7%).A decrease in the intensity of sexual desire was reported in 63%of pregnant *** than 60%of the subjects did not consult with doctors and midwives with regards to sexual issues(63.5%).The most common reason for not consulting was not feeling the need(32%).Most women experienced back pain during(42.8%)and after(39.8%)***:Changes in sex life during pregnancy are often caused by the lack of sexual knowledge and the increase in misconceptions among couples,which can affect the quality of *** role of education is ***,it is suggested that by including sexual counseling along with pregnancy care,wrong beliefs and information among women will be corrected.

关键词： Sexual behavior Women Pregnancy Midwifery Sex counseling Fetus

Network and data location aware approach for simultaneous job scheduling and data replication in large-scale data grid environments

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2014年第3期8卷 391-408页

作者： Najme mansouri Department of Computer Science Shahid Bahonar University of Kerman Kerman 97175-569 Iran

Data Grid integrates graphically distributed resources for solving data intensive scientific applications. Effective scheduling in Grid can reduce the amount of data transferred among nodes by submitting a job to a node, where most of the requested data files are available. Scheduling is a traditional problem in parallel and distributed system. However, due to special issues and goals of Grid, traditional approach is not effective in this environment any more. Therefore, it is necessary to propose methods specialized for this kind of parallel and distributed system. Another solution is to use a data replication strategy to create multiple copies of files and store them in convenient locations to shorten file access times. To utilize the above two concepts, in this paper we develop a job scheduling policy, called hierarchical job scheduling strategy （HJSS）, and a dynamic data replication strategy, called advanced dynamic hierarchical replication strategy （ADHRS）, to improve the data access efficiencies in a hierarchical Data Grid. HJSS uses hierarchical scheduling to reduce the search time for an appropriate computing node. It considers network characteristics, number of jobs waiting in queue, file locations, and disk read speed of storage drive at data sources. Moreover, due to the limited storage capacity, a good replica replacement algorithm is needed. We present a novel replacement strategy which deletes files in two steps when free space is not enough for the new replica： first, it deletes those files with minimum time for transferring. Second, if space is still insufficient then it considers the last time the replica was requested, number of access, size of replica and file transfer time. The simulation results show that our proposed algorithm has better performance in comparison with other algorithms in terms of job execution time, number of intercommunications, number of replications, hit ratio, computing resource usage and storage usage.

关键词： data replication data grid optorSim job scheduling simulation

Epidemiological, Clinical and Coronary Angiography Aspects of Acute Coronary Syndrome in the Cardiology Department of the Hospital Mother-Child “Le Luxembourg”Mali

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 Cardiovascular Diseases 2024年第4期14卷 228-233页

作者： Sidibé Samba Toure Mamadou Konate Massama Sankaré Hamma Traoré Ousmane Mahamat Guire Sadik Diall mahan Ameri Dicko Bahaide Daffe Sanoussy Keita Asmaou Thiam Coumba Adiaratou Diarra Soumaila Menta Ichaka Cardiology Department CHU-M&#232re Enfant Bamako Mali Cardiology Department CHU-Point G Bamako Mali Faculty of Medicine University of Sciences Techniques and Technologies of Bamako Bamako Mali Cardiology Department CHU-Gabriel Tour&#233 Bamako Mali Cardiology Department Mali Hospital Bamako Mali

Introduction: Cardiac catheterisation plays a fundamental role in the management of acute coronary syndrome. These explorations require heavy, complex and costly equipment and a large team of doctors, nurses and technicians with highly specialized training. Aims: To describe epidemiological, clinical and coronary angiography aspects of patients with acute coronary syndrome. Patients and Methods: Descriptive study from September 2019 to December 2023 in the Cardiology Department of the Hôpital Mère-Enfant of Bamako. Inclusion criteria were patients admitted for coronary angiography with the diagnosis of acute coronary syndrome. Results: During the study period, 1253 patients underwent coronary angiography, 596 of whom had acute coronary syndrome as an indication, representing a hospital frequency of 47%. Sex-ratio was 2.10. Mean age of patients was 58.5 ± 11.39 years. ST elevation acute coronary syndrome was the most common indication with 63.92% of cases. High blood pressure was the main cardiovascular risk factor with 58.7% of cases, and radial access approach was used in 98% of cases. Coronary angiography was pathological in 91.70% of cases (n = 548). Patients with lesions of anterior interventricular artery were 73.73% of cases. Tritruncal lesions accounted for 40.63% of cases. Conclusion: ST elevation acute coronary syndrome is the most frequent manifestation of acute coronary syndrome. Anterior interventricular artery is most often the culprit lesion for our patients.

关键词： Coronary Angiography Acute Coronary Syndrome Bamako Mali

Adaptive data replication strategy in cloud computing for performance improvement

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2016年第5期10卷 925-935页

作者： Najme mansouri Department of Computer Science Shahid Bahonar University of Kerman Kerman *** Iran

Cloud computing is becoming a very popular word in industry and is receiving a large amount of atten- tion from the research community. Replica management is one of the most important issues in the cloud, which can offer fast data access time, high data availability and reliability. By keeping all replicas active, the replicas may enhance system task successful execution rate if the replicas and requests are reasonably distributed. However, appropriate replica place- ment in a large-scale, dynamically scalable and totally vir- tualized data centers is much more complicated. To provide cost-effective availability, minimize the response time of ap- plications and make load balancing for cloud storage, a new replica placement is proposed. The replica placement is based on five important parameters： mean service time, failure probability, load variance, latency and storage usage. How- ever, replication should be used wisely because the storage size of each site is limited. Thus, the site must keep only the important replicas. We also present a new replica replacement strategy based on the availability of the file, the last time the replica was requested, number of access, and size of replica. We evaluate our algorithm using the CloudSim simulator and find that it offers better performance in comparison with other algorithms in terms of mean response time, effective network usage, load balancing, replication frequency, and storage usage

关键词： cloud computing CloudSim replica placement,replica replacement

在线全文

学校读者我要写书评

暂无评论

兼容火箭推进剂的燃料电池混合能源系统

电源技术 2024年第5期48卷 963-968页

作者：马菡王绍成孙凤换齐济北京航天动力研究所北京100076

针对使用液氢/液氧的重型火箭发动机上存在氢氧蒸发气体无法有效利用的问题,提出了一种与火箭推进剂兼容的氢氧燃料电池混合能源系统设计方案。混合能源系统以满足负载使用需求为主要目标,综合考虑氢氧燃料电池效率和锂电池使用寿命,制... 详细信息

针对使用液氢/液氧的重型火箭发动机上存在氢氧蒸发气体无法有效利用的问题,提出了一种与火箭推进剂兼容的氢氧燃料电池混合能源系统设计方案。混合能源系统以满足负载使用需求为主要目标,综合考虑氢氧燃料电池效率和锂电池使用寿命,制定了混合能源系统的控制策略以及混合能源系统评价函数。基于MATLAB的仿真分析结果表明,在火箭上使用混合能源系统比单一的锂电池减重约940 kg,系统比能量提高约214.5%,且可以与箭上生命保障、环境热控系统相结合,具有广阔的实际应用前景。

关键词：液氢/液氧火箭发动机氢氧燃料电池混合能源

The influence of inlet swirl intensity and hot-streak on aerodynamics and thermal characteristics of a high pressure turbine vane

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2021年第11期34卷 66-78页

作者： Zakaria.mansouri Riyadh BELAMADI ABYLSEN Science&Technology Rhone Alpes Grenoble 38000France Ecole Superieure de Technologies Industrielles(ESTI) Annaba 23000Algeria

In modern gas turbines,the High Pressure Turbine(HPT)is exposed to an extreme thermal environment due to the burned gases leaving the *** burned gases are characterized by flow and temperature distortions that effect the aerodynamics and heat transfer of the *** purpose of this paper is to investigate numerically the effect of the intensity of the swirling flow combined with the temperature non-uniformity‘‘Hot-Streak"(H-S)on the aerothermal performances of a HPT Nozzle Guide Vane(NGV).The investigations are conducted on the solid untwisted NGV annular cascade developed in NASA Lewis Research *** swirl intensities(|S_(n)|=0,0.1,0.25 and 0.5),two swirl orientations(positive and negative)and two hot-streaks(rounded and radial)at the NGV inlet are *** simulations are done by solving the Reynolds Averaged Navier-Stokes(RANS)equations using ANSYS-CFX *** results show that the H-S with swirl undergoes twisting following the orientation of the *** H-S twist is aggressive under positive swirl compared to the negative swirl *** inlet swirl generates a new secondary flow structure,so called Swirl Vortex(SV),which induces more aerodynamic *** aerodynamic efficiency under negative swirl found to be higher than that under positive *** maximum temperature on the vane surface is controlled by the radial transport of the SV towards the endwalls.

关键词： Aerodynamics Heat transfer Hot-Streak HP turbine NGV Swirl intensity

Dirac Points in Two-Dimensional Inverse Opals

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2013年第10期30卷 164-166页

作者： G.D.mahan Department of Physics Pennsylvania State UniversityUniversity ParkPA 16802USA

The electron energy states and energy bands are calculated for a two-dimensional inverse opal *** that the opal structure is closed-packed circles,the inverse opal has the honeycomb *** honeycomb lattice in two dimensions has a Diract *** properties can be manipulated by altering the structure of the inverse opal:the radius of the circle,and the small gap between circles.

关键词： structure inverse Dirac

Therapeutic cell engineering:designing programmable synthetic genetic circuits in mammalian cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Protein & Cell 2022年第7期13卷 476-489页

作者： Maysam mansouri Martin Fussenegger Department of Biosystems Science and Engineering ETH ZurichMattenstrasse 264058 BaselSwitzerlandDepartment of Biosystems Science and EngineeringETH ZurichMattenstrasse 264058 BaselSwitzerland Faculty of Science University of BaselMattenstrasse 264058 BaselSwitzerland

Cell therapy approaches that employ engineered mam-malian cells for on-demand production of therapeutic agents in the patient's body are moving beyond proof-of-concept in translational *** therapeutic cells can be customized to sense user-defined signals,pro-cess them,and respond in a programmable and pre-dictable *** this paper,we introduce the available tools and strategies employed to design therapeutic ***,various approaches to control cell behav-iors,including open-loop and closed-loop systems,are *** also highlight therapeutic applications of engineered cells for early diagnosis and treatment of various diseases in the clinic and in experimental dis-ease ***,we consider emerging technolo-gies such as digital devices and their potential for incorporation into future cell-based therapies.

关键词： synthetic biology cell-based therapy cell engineering therapeutic gene expression controllable genetic circuits

Numerical Investigation of Effect of Porosity and Fuel Inlet Velocity on Diffusion Filtration Combustion

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2021年第4期30卷 1278-1288页

作者： TAROKH Ali LAVRENTEV Artem mansouri Abraham Department of Mechanical Engineering Lakehead UniversityThunder BayP7B5E1Canada Department of Mechanical Engineering Higher College of TechnologyDBMDubai 15825UAE

Methane-air diffusion filtration combustion in a radiative round-jet burner was numerically investigated in this *** purpose of this study was focused on the effects of porous media porosity and gas velocity on temperature distribution and CO and NO_(x)*** chemical kinetics was used where air and methane were assumed to be at their stoichiometric ratio,while thermo-physical properties were varied per the solid matrix porosity *** characteristics were evaluated based on conduction and radiation as the two primary heat transfer modes within the solid *** simulations were carried out based on a packed bed with 3 mm alumina *** show that combustion temperature increases while the temperature gradient decreases with the increase in porosity,yielding higher NO_(x),and lower CO ***,the combustion temperature is the lowest and most uniformly distributed with 1 m/s and 3 m/s gas velocities,wherewith 3 m/s gas velocity,combustion occurs outside of the porous *** corresponding NO_(x)and CO emissions are the lowest with 1 m/s gas velocity and increase with the increase in gas velocity from 1 m/s to 10m/s.

关键词： non-premixed diffusion filtration combustion methane-air combustion porous media numerical simulation