After examining the specific problems of testing and quality assurance for web-based applications, we propose a strategy by integrating existing testing techniques and reliability analyses in a hierarchical framework. This strategy combines various usage models for statistical testing to perform high level testing and to guide selective testing of critical and frequently used subparts or compon...

Purpose High-reliability performance and high-hazard are intertwined in High-Reliability Organizations (HROs) operations; these organizations highly safe, hazardous significant for the modern society, not only valuable resources they have, but also indispensable services provide. This research intend to understand how HROs could produce high quality despite their challenging demanding contexts....

e nergy consumption has increased significantly in iran during the recent decades. in this study, an inter-industrial model has been improved to investigate the sources of the changes in the energy consumption of the country. the input-output tables of iran for the years 1988 and 2001 have been employed as the database of the model. the innovation of this research allows the researchers to stud...

integration and coherence within a city’s physical structure have become an issue for towns and cities as theyrapidly expand, incorporate new elements, and undergo incessant changes. at present, we are facing an extensive accumulation of signs and traits in modern urban patterns; many unaccustomed to and incongruous are affecting the socio-cultural and physical characters of cities. here, we wi...

A large number of problems in manufacturing processes, production planning, finance and engineering design require an understanding of potential sources of variations and quantification of the effect of variations on product behavior and performance. Traditionally, in engineering problems uncertainties have been formulated only through coarse safety factors. Such methods often lead to overdesig...

present research seeks to review factors affecting responsiveness of training organizations to society network evolution. data from 500 directors and deputies of secondary schools in the city of tehran using stratified random sampling gathered through a questionnaire and analyzed using structural equation modeling. reliability of this questionnaire was calculated using cronbach's alpha at ...

the validity of survey was approved by human resources experts in university of tehran and reliability has been calculated using cronbach's alpha coefficient in which the coefficient of each dependent and independent variable calculated more than 0.7. the statistical population of this research included as employees of university of tehran including staff and expert managers, this populati...

current practices in railway track analysis and design are reviewed and discussed in this paper. the mechanical behavior of railway track structure comprising of various components has not been fully understood due to the railway track structural complexity. although there have been some improvements in the accuracy of current track design methods in recent decades, there are still considerable...