<span lang="EN-US">Because of rising dependency on fossil fuels, and rising amounts of toxic gases in the environment, it found that people are in need of a way to ensure the safety specifically those that live in cities. An approach is suggested in this paper, that is economical yet affords good detection, and can give accurate readings that can be analyzed and manipulated, and can even provide warnings through sending emails. These requirements are found in the Raspberry Pi when it hooked up to the sensors. This paper was focused on few dangerous gases such as Carbon Monoxide (CO), Nitrogen Dioxide (NO2) and other gases. The results in this paper showed that some gases, specifically CO, may be a problem in Kuwait as it is always slightly below the warning level. The success with the Raspberry Pi and the results were encouraging to open the way for much improvement in the future.</span>
The aim of this paper is to develop a general conceptual model of attack progression that can be applied to modeling of computer and communication threat risks. This paper focuses on attacks that aim at overpowering the victim/prey to gain some benefi t. It examines existing models and introduces a new fl ow model to facilitate development of a general model of two-sided combat. The symmetry between the attacker's and defender's fl ow systems of signals, information, plans, decisions, and actions results in a single combat model incorporating the realms of both attacker and defender. Based on this conceptualization, it is possible to characterize the weak points and develop a map of vulnerabilities in the defender's system. Such a methodology of attack modeling provides a base for analysis in the fi elds of threat modeling and secure software development. Finally, this new model is applied to an SQL injection problem in web services to demonstrate implementation of a real system problem.
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