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In business environment, the case could be highly uncertain, or ambiguity which makes decision making process is strenuous. Therefore, creating a Decision Support System (DSS) to deal with this complexity is significant. In this paper, a DSSs bank has been suggested, where a decision maker select a decision from group of suitable provided decisions. First Order Logic (FOL) has been used for modeling and validating the proposed bank. Four FOL rules have been presented and explained to validate this proposed decisions bank. Keywords— decision support systems, knowledge management, decision modeling.

The continuous development of social media and online commerce, which permeates all aspects of our lives, leads to the need for a similar mechanism similar to the financial credit score in traditional business. Also, a realistic classification of users through social media to be used in all aspects of the relation-ships between users and some of them or between them and organizations is needed. In this article a new metrics to classify users according to their creditworthiness of the transactions that take place through the Internet is established. The object from this aricle design a social credit system model (SCSM) based on these new metrics. How to deal on the Internet, attacking people on social media, violating the privacy of people and others. Also Buying and selling operations, executing purchase and sale orders, paying amounts of money easily and quickly, and so on. These data and their degree of importance were determined according to several questionnaires directed to several segments of society. This creditworthiness can be used in banks, Uber, Online transactions and so on.

Solar energy has been considered as one of the promising energy sources. The construction of the solar photovoltaic (PV) plants has brought modelling issues. The accurate and efficient full system model is crucial for performance evaluation. Most of the existing theoretical studies focus on partial modelling and there are not many studies focus on full system modelling. The main aim of this paper is to provide a realistic mathematical modelling for the major system components for precise performance assessment. Firstly, the system is tested under different solar irradiance levels and constant ambient temperature for the constant load. Secondly, the system is tested at low irradiance level and maintaining a constant ambient temperature for different loads. The results of the system models under the different testing conditions precisely draw the system behavior based on the mathematical expression. The proposed models accurately disclosure the system behavior under different working conditions. The results also have provided a realistic and efficient system performance evaluation. Comparing the results of the system behaviour under different working conditions with and without battery storage, using battery storage has shown better system power reliability.

Cloud computing is undoubtedly considered one of the most discussed topics in recent times, both in the research and business sectors. Various schools of thought have attempted to provide a fitting definition from many aspects. This computing paradigm can be defined as a web-based computing model designed to allow both off-site storage and easy data and digital file sharing. The SQL injection, which is certainly one of the top ranking vulnerabilities in cloud systems, is addressed in this paper. Also, a novel three-tier system for detection and mitigation of SQLi attacks is proposed. The methodology is involved over dynamic, static and runtime prevention and detection mechanisms. Moreover, it removes malicious queries and ensures the system is prepared for an environment that is secure despite being focused on the database server only. For the three-tier architecture, the first approach involves detection and prevention that follows the client logic access and data server (three-tier) organization to access, process and exchange queries. Furthermore, it makes sure no vulnerable code is executed that might affect the hosted operating system either partially or entirely. Experimental evaluation schemes demonstrate the efficiency and superiority of the scheme compared with existing approaches.