Today snow and avalanche studies have progressed dramatically throughout the world, and countries are experiencing avalanche phenomena have established advanced research and development centers in this regard. For many years, they have used their research and results. In Iran, despite the presence of snow in some parts of the country, no official observing centers have made in the country. One of the important issues in the avalanche studies are: the avalanche risk map that identifies avalanches in snowy and mountainous regions, but this map is very different from the avalanche risk map. Many domestic researchers find the two maps mistakenly the same. In this research, we have tried to determine the difference between avalanche hazard map and avalanche risk map.

Myocardial Infarction happens when blood stops flowing properly to part of the heart and the heart muscle is injured due to not receiving enough oxygen. Percutaneous coronary intervention (PCI), is a non-surgical procedure used to treat the Myocardial Infarction. When PCI is success, average life expectancy of patient is increased and patient returns to normal life. Every year, part of PCI knowledge, as scientific articles, are provided to medical communities. Extraction of implicit knowledge in papers facilitated access to PCI knowledge, PCI Knowledge map shows a comprehensive picture of PCI. Knowledge map is a tool for presenting complex process and relation between concepts. This paper base on text mining and using Co-occurrence Analysis method, extracted causal relationships between PCI concepts from abstract of 20 years paper and illustrating these relationships, then Validated PCI map by experts, Importance of relationships between concepts is determined Using fuzzy cognitive map. in this paper FCM is trained with AHL and DHL algorithms, result indicated PCI has scientific Structure. PCI Fuzzy Knowledge map can be used in training, process of PCI changes, and determines the most important factors that influence the success of PCI.

Nowadays, RFID technology is using widely in our daily lives. This technology is used in many applications such as healthcare, military, identifying friend or foe of fighter-aircraft and etc. In order to provide security and privacy of RFID systems, different authentication protocols have been proposed. Pang proposed a RFID authentication protocol based on EPC C-1 G-2 standard. They claimed that their protocol is secure against various attacks and provides user privacy. It is shown that protocol proposed by pang is not safe and suffer from attacks such as tag ID exposure, tag impersonation, reader impersonation and de-synchronization. Also to enhance security of RFID users, an improved version of this protocol is proposed, showing that it is secure against aforementioned attacks. In addition, complexity and efficiency of the improved protocol is compared with some similar ones and it is shown that the improved protocol is completely secure. Eventually, security of the improved protocol is compared with some existed protocols.

Two forms of Acetylcholinesterase (AChE) could be found in the Wistar rat brain homogenate, soluble and membrane bound enzyme. In order to study and purification of this enzyme, a homogenate of Wistar rat brain was prepared in a phosphate buffer, after centrifugation, supernatant which contains the soluble enzyme was separated. In the second stage the pellet was resuspended in the same volume of phosphate buffer contained Triton X-100 and centrifuged again. The supernatant this time contained the membrane bound enzyme. This enzyme was isotaled and purified using map-Agarose.