Analysis and Design Security Primitives Based on Chaotic Systems for eCommerce

Security is considered the most important requirement for the success of electronic commerce, which is built based on the security of hash functions, encryption algorithms and pseudorandom number generators. Chaotic systems and security algorithms have similar properties including sensitivity to any change or changes in the initial parameters, unpredictability, deterministic nature and random-like behaviour. Several security algorithms based on chaotic systems have been proposed; unfortunately some of them were found to be insecure and/or slow. In view of this, designing new secure and fast security algorithms based on chaotic systems which guarantee integrity, authentication and confidentiality is essential for electronic commerce development. In this thesis, we comprehensively explore the analysis and design of security primitives based on chaotic systems for electronic commerce: hash functions, encryption algorithms and pseudorandom number generators. Novel hash functions, encryption algorithms and pseudorandom number generators based on chaotic systems for electronic commerce are proposed. The securities of the proposed algorithms are analyzed based on some well-know statistical tests in this filed. In addition, a new one-dimensional triangle-chaotic map (TCM) with perfect chaotic behaviour is presented. We have compared the proposed chaos-based hash functions, block cipher and pseudorandom number generator with well-know algorithms. The comparison results show that the proposed algorithms are better than some other existing algorithms. Several analyses and computer simulations are performed on the proposed algorithms to verify their characteristics, confirming that these proposed algorithms satisfy the characteristics and conditions of security algorithms. The proposed algorithms in this thesis are high-potential for adoption in e-commerce applications and protocols

The Effect of Pilates Training on Some Physical and Skill Variables in Breaststroke Swimming

The study aimed to identify the effect of Pilates training on some physical and skill variables in breaststroke swimming, the researchers used the experimental method, designing one group for its suitability to the nature of the study. The study sample consisted of (14) students from the swimming training course at the faculty of physical education at yarmouk university, who were decided by the intentional method. The results showed that there were statistically significant differences between the tribal and remote measurements on the development of some physical variables in breaststroke among the experimental group members and in favor of the post measurement, and the presence of statistically significant differences between the two measurements, the pre and post, on the development of some skill variables in breaststroke among the experimental group members and in favor of the post measurement. The researchers recommended to more studies should be conducted on the impact of Pilate’s exercises on the development of some physical and skill variables among players in other sports such as athletics, football and basketball

Review the Operational Excellence Factors of Service Firms: A Literature Review

Operational excellence is considered as a competitive weapon for firms, both in service and manufacturing. Firms should therefore carefully study their operation strategy choices due to the high impact that results from applying operation strategy decisions on operational excellence. There are many factors that can lead to operational excellence, including leadership, human resource management practices, operations strategy, and involvement culture, and these will be the focus of this work. This research reviews the literature related to operations and excellence in service firms. Moreover, it investigates the factors that affect the operational excellence of service sector.  In the literature, operational excellence for the service sector is still ambiguous. This research is an attempt to take advantage of the developments made in the industrial field, while at the same time drawing together different factors that have been studied separately in the past. We propose a theoretical framework that investigates some factors that affect operational excellence. Therefore, we propose implementing our theoretical model in the service sector, amongst others. Moreover, we suggest a further investigation on the obstacles may face the firms to reach operational excellence.

Factors Affecting Consumers’ Intention to Use Mobile Ride Hailing Services in Developing Countries

Sharing economy services are growing very quickly, including with successful implementations such as mobile ridehailing services, where by consumers and drivers can coordinate to share rides. This research investigates factors that are affecting consumers’ intention to use mobile ridehailing services in developing countries. The research data was collected in June 2021 from Jordanian consumers using an online questionnaire. The collected data was then analyzed to verify the research hypothesizes using Partial Least Squares Structural Equation Modeling (PLS-SEM). The empirical findings indicate that personalized benefits positively attract consumers to use mobile ridehailing applications. The findings also show that consumers’ privacy concerns negatively affect consumers’ intention to use mobile ridehailing applications. Moreover, the findings also show that the role of laws and regulations is significant in such contexts as it decreases the negative interaction between privacy concerns and consumers’ intention to use ridehailing applications. Accordingly, this research suggests that ridehailing practitioners should focus on providing more convienent services and at the same time governments and policy makers should provide protective legislations to overcome user’s privacy concerns