abstract background and aim: visual impairment affects people's quality of life. since the effect of rehabilitation services is measured by improving in quality of life, this study was performed to evaluate the effect of rehabilitation services on quality of life in the blind. materials and methods: 121 blind and low vision people who covered by zahedan welfare organization were studied by...

Recent work on applying semantic technologies to learning has concentrated on providing novel means of accessing and making use of learning objects. However, this is unnecessarily limiting: semantic technologies will make it possible to develop a range of educational Semantic Web services, such as interpretation, structure-visualization, support for argumentation, novel forms of content customi...

Recently, a large amount of content is delivered to users by content delivery services through broad-band networks. The necessity for the service which guarantees quality is increasing in the Internet, because users' requirements are diversified. Differentiated services, which have multiple classes using priority control, are being introduced. The limited network resources can be used effective...

plants are always exposed to vast aspects of either environmental biotic or abiotic stresses and those stresses affecting the plant growth and therefore crop production. molecular and physiological mechanisms influence plant resistance to environmental stresses, therefore the identification of these mechanisms can be an important step in challenging the damages. in this study, plant physiologic...

introduction: medical tourism marketing is currently known as a competitive and profitable industry throughout the world. it is considered as a modern field of developed tourism. appropriate provision of information would increase the awareness of medical tourists about the capabilities of health services. this study was conducted to evaluate the effects of information mechanisms on attracting ...

Service Oriented Enterprises (SOEs) are subject to constant change and variation. In this paper, the changes are considered from an economic perspective based on service culture notion. Once a change is implemented, the costs of some member services may increase, whereas the costs of some other services may reduce. We construct a game theoretic model trying to capture the possible conflicting i...