نتایج جستجو برای: and communications sectors

تعداد نتایج: 16835254  

Journal: :پژوهش های علوم تاریخی 0
فرج¬اله احمدی استادیار گروه تاریخ دانشگاه تهران

although the history of communication is as old as history of human society, the speed and volume of communication with the advent of electronic era in the 19th century created a revolution in the communication technology. at a time when prussia was traversing the path of industrialization and the number of companies investing in different industries was increasing by the day, the company of si...

Journal: :iranian journal of neonatology 0
hossein jabbari national public health management center (npmc) and department of social medicine, tabriz university of medical sciences, tabriz, iran fariba bakhshian department of public health, tabriz university of medical sciences, tabriz, iran hossein alikhah physician, researcher, tabriz university of medical sciences, tabriz, iran reza piri liver and gastrointestinal disease research center, tabriz university of medical science, tabriz, iran mohammad naghavi-behzad students research committee, medical faculty, tabriz university of medical science tabriz, iran farid karkon shayan medical philosophy and history research center, tabriz university of medical science, tabriz, iran

background: this study aimed to investigate different methods used to provide necessary supplementations for pregnant women and obtain reliable data about the general status of health promotion during pregnancy. methods: this descriptive, cross-sectional study was conducted on 401 pregnant women referring to different women’s hospitals of tabriz, including alzahra, taleghani, 29-bahman, zakariy...

2010
Hidekazu Taoka Satoshi Nagata Kazuaki Takeda Yuichi Kakishima Katsutoshi Kusume

† Currently DOCOMO Communications Laboratories Europe GmbH *1 MIMO: A signal transmission technology that uses multiple antennas at both the transmitter and receiver to perform spatial multiplexing and improve communication quality and spectral efficiency (see *3). *2 CoMP: Technology which sends and receives signals from multiple sectors or cells to a given UE. By coordinating transmission amo...

Journal: :تحقیقات اقتصادی 0
حسن سبحانی دانشیار دانشکده اقتصاد دانشگاه تهران حمید عزیز محمدلو دانشجوی دکتری علوم اقتصادی دانشگاه تهران

the main objective of this study is to investigate the production factors productivity in large manufacturing sub-sectors. for this purpose, using statistical data for period 1972-2004, we have tried to study and analyze the trend and level of production factors productivity (partial and total productivity) in each sub-sectors classified according to isic two digits code. the average and margin...

2013

Abstract This paper proposes a hybrid scanning antenna architecture for applications in mmwave intelligent mobile sensing and communications. We experimentally demonstrate suitable Wband leaky-wave antenna prototypes in substrate integrated waveguide (SIW) technology. Three SIW antennas have been designed that within a 6.5% fractional bandwidth provide beam scanning over three adjacent angular...

2001
Catherine Beaudry Peter Swann Annalee Saxenian Ashish Arora Alfonso Gambardella Paul Romer

This paper studies how firm performance is influenced by the strength of the industrial cluster (or industrial district) in which it is located. The paper presents estimates of firm-level growth models for a range of two-digit industries in the UK. In these models, employment in the firm’s own sector and employment in other sectors is taken as a measure the strength of the cluster. Strong posit...

2007
Ita Richardson

Purpose – This paper considers the requirements for an industry sector approach to entrepreneurship education – The Information and Communications Technology (ICT) Sector. We present a modified Process Framework for Entrepreneurship Education focusing specifically on ICT. The primary components of the Process Framework are described (inputs, process and content, assessment and outputs) to assis...

2004
Barry Boehm LiGuo Huang

In this article, we show how you can use the MBASE process framework to generate a family of acquisition process models for delivering user-satisfactory systems under schedule, cost, and quality constraints. We present the six major steps of the Schedule/Cost/Schedule-Cost-Quality as Independent Variable (SAIV/CAIV/SCQAIV) process using SAIV and a representative Department of Defense (DoD) Comm...

Journal: :CoRR 2015
Tavish Vaidya

Widespread and extensive use of computers and their interconnections in almost all sectors like communications, finance, transportation, military, governance, education, energy etc., they have become attractive targets for adversaries to spy, disrupt or steal information by presses of keystrokes from any part of the world. This paper presents a survey of major cyberattacks from 2001 to 2013 and...

2009
Paul Rohmeyer

This paper explores the concept of enterprise resiliency in Information and Communications Technologies (ICT) for development initiatives. ICT are necessary to improve access to vital services and to ultimately support efforts to improve economic conditions in developing regions. Access to information resources provides substantial benefits in the public and private sectors of regions with low ...

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