دسترس پذیری

The emerging technology of the Internet of Things provides the ability to send and receive data between different objects through communication networks and can be the source of tremendous changes in military equipment and enhancing the efficiency of defense departments. The command and control system is one of the most important areas of defense systems that can be transformed by Internet of Things technology. Command and control is the planning, guidance, coordination and control of the operations based on the effective operation of the operational scenario, so in order to achieve the best result, complete, accurate and timely information is essential. On the other hand, utilizing the Internet of Things technology allows the commanders to get the most accurate and accurate information about the battle scene in the shortest time. This research was conducted with the aim of examining the requirements for exploiting the Internet of Things technology in the command and control system.This study is a descriptive and qualitative descriptive in terms of the purpose of the applied type and in terms of descriptive and qualitative method, using content analysis method. The statistical population of the study was people who were expert and knowledgeable about cyber space and command and control issues, that 30 person of them were selected purposefully and a questionnaire was conducted about them.The results show that in order to use the Internet of Things in the command and control system, it should be in three layers of the program, reception, network and infrastructure, in order to upgrade and localize the software, use dynamic security patches, ensure the health of the microprocessors, provide security of the sensors, utilizing cryptography, providing network availability, matching protocols, network scalability, creating a Private cloud, providing physical protection and energy supply of sensors.

The aim of this study is to determine how to provide acquisition work, and how to provide access to electronic resources in academic libraries in the province of Ardebil.
Survey research method was used and the data was collected by a researcher­-­made questionnaire. Ninety-eight managers and collection development officers of fifty-four central and faculty library were participated in this research.
Findings: The results of this study showed that, of fifty-four university libraries surveyed, eight libraries (14.8 percent) did not include any kind of electronic resources in their collections. About the provision of electronic resources, the most important provision of electronic journals is, "sharing" (by mean of 4.44), the most important provision of the e-books is, "Buying" (by mean of 4.44), the most important provision of databases is, "Sharing" (by mean of 3/76), and most importantly producing electronic theses are, "produced in electronic form" (by mean of 4/50), respectively. Other results indicated that the "internal network university" with an average availability of 2/57 was the most important method of electronic resources in academic libraries in the province of Ardebil.
The study investigated the electronic resources in the academic libraries in the province of Ardabil, information about electronic resources available as to provide access to these resources in the library to be achieved to other institutions and organizations in the development of their electronic documents easier to operate.

Finding the shortest path in transportation networks is one of the most important analyses which is usesd mobile GeoInformation Systems. Continuous changes of traffic congestion in transportation networks make unreliability in estimating the shortest path using current algorithms. This leads each obtained path to have “risk of changing path” in severe traffic congestion.In the current paper, after introducing the concept of the risk, the method of modeling this risk based on topologic and geometric characteristics of networks has been mentioned. The effectiveness of shortest path algorithms could be much increased with an acceptable rate using the proposed model. This is confirmed by testing the proposed algorithm on the real network of a region of Tehran.