one of the most important problems in organization and management research is uncompatibility of subject and research method. traditionally researchers of management and organization have used research methods of natural sciences to explore the unknown of organizations. in this article, author tries to introduce qualitative research as an appropriate approach to solve the mentioned problem. nat...

Basic role based access control [RBAC] provides a mechanism for segregating access privileges based upon users' hierarchical roles within an organization. This model doesn't scale well when there is tight integration of multiple hierarchies. In a case where there is joint-tenancy and a requirement for different levels of disclosure based upon a user's hierarchy, or in our case, organization or ...

I n this issue of the Journal of ExperimentaI Medicine, Loetscher et al. show that receptors for ~-chemokines are upregulated when T lymphocytes are activated by interleukin-2 (1). This paper will be of considerable interest not just to those who have worked for some years to identify conditions whereby chemokines could attract T ceils, but also to HIV researchers and conceivably to retrovirolo...

For many years the tribes and communities of American Indians and Alaska Natives have been the subject of intense study and research in a number of disciplines, particularly anthropology, sociology, psychology, and medicine. Until recently, virtually all research was conducted by non-Indians. Only in the past 20 years have more American Indians begun to enter into the social science professions...

Role-based access control (RBAC) has recently received a lot of attention due to its exibility, expressive power and simplicity in administration. In RBAC permissions are associated with roles and users are made members of roles thereby acquiring the associated permissions. Centralized management of RBAC in large systems is a tedious and costly task. An appealing possibility is to use RBAC itse...

researchers of razi vaccine and serum research institute have vital role in the health, food security and prevention of common diseases in the country. therefore, conducting research on information seeking behavior and information needs will help us to delivering the better information services. so, investigation of information seeking behavior of the researchers and methods in accessing to the...

NEXT MONTH IN TOKYO, ASIA’S LARGEST BIOTECHNOLOGY EVENT WILL TAKE PLACE—THE International Bio Technology Exhibition and Conference. Japan’s traditional strength in both biology and technology makes it a very appropriate site for this forum. But over the long term, Japan’s science and technology future will require that our nation place a much stronger focus on encouraging risk taking and indepe...