in this paper, we focus on a continuously deteriorating critical equipment which its failure cannot be measured by cost criterion. for these types of systems like military systems, nuclear systems, etc it is extremely important to avoid failure during the actual operation of the system. in this paper we propose an approach which constrains failure probability to a pre-specified value. this valu...

The recent advancements in the wireless technology and their wide-spread deployment have made remarkable enhancements in efficiency in the corporate and industrial and Military sectors The increasing popularity and usage of wireless technology is creating a need for more secure wireless Ad hoc networks. This paper aims researched and developed a new protocol that prevents wormhole attacks on a ...

The paper analyzes the electromagnetic (EM) radiofrequency (RF) radiation hazards onboard a ship arising from shipboard radiocommunication and navigation equipment. EM field effect on personnel and equipment can be harmful if field levels exceed the threshold values. These fields need to be controlled for proper protection. Ships are equipped with lots of EM RF radiation sources with different ...

For comparative purposes, a 200 volt dc system for a large modern commercial aircraft has been designed and Its weight compared with that of a conventional three-phase ac system. To obtain necessary design informatlon, studies have been made of a 50 kW brushless dc generator, the problem of circuit Interruption, conversion equipment and brushless motors. The vulnerability of the system due to t...

Night vision devices provide enormous benefits. They enable personnel to carry out operations under conditions that would not otherwise be possible. However, these benefits carry considerable risks. For instance, individuals often become over confident about their ability to use image intensification and infrared devices. In consequence, the use of night vision equipment is an increasingly comm...

Defense planners spend considerable time generating and evaluating options for modernizing our nation's aging fleets of weapon systems. In the U.S. Army, this process involves generating plans for modernizing units with new equipment and identifying efficient strategies for using older equipment. Dynamic constraints and variables such as changes in defense doctrine or military force structure c...

This paper presents a simulation study for military land equipment operational availability (OA). A discrete event simulation model was developed within this study to support the analysis of the effect of several maintenance regimes on OA namely Corrective Maintenance (CM), Scheduled Preventive Maintenance (SPM), and Condition-Based Maintenance (CBM). The model was implemented using the ARENA e...

Composite materials are often more practical in use for different military applications. These materials provide interesting results especially through their good strength properties, corrosion resistance and low specific weight. These materials have various structures. Any defect of these materials usually has a more complicated and other form than in metals and that is why methods and diagnos...