Sharif Digital Repository

Many embedded processors are used in harsh environments and their behavior should be investigated against the incidence of common faults. Fault Injection is a prevalent method to do this investigation. Simulation-based fault injection is one of the most prominent forms of fault injection. A fault model is required to do simulation-based fault injection. Simulated faults should have the most similarity to the real faults. Temperature variation and in the extreme case thermal shock is one of the probable faults in harsh environment. In this thesis, we want to propose fault models for thermal shock in various abstraction levels, evaluate and compare these fault models and present methods to use... 

Researches on internationalization and export have categorized all factors as internal and external and most of them try to explain this behavior by studying external factors. Recent study in this field have shown that simply promoting specific behavior is not enough, and it is important to try to change the attitudes of managers toward internationalization. Utilizing Theory of Planned Behavior (TPB), this research tries to understand the relationship between attitudes of managers and internationalization behavior of an organization. the explicit objective of this research is to determine the factors which influence the organization behavior on internationalization (specifically indirect... 

In this thesis, study of some kinds of dual band transmission lines and structures are investigated. Attention to 3 important kinds, CRLH, SCRLH and the equal phase line are introduced and the formulations of each one are derived and considered. Also the method of designing these lines are attached. These lines form a complete category that makes the ability of designing all kind of dual band line with arbitrary frequencies and result phases with arbitrary non-integer ratio less or more than 1. Also an important attention is paid for the designing these lines in the microstrip configuration. Various kinds of Dual band structures are proposed at the last part of the introducing each lines.... 

Considering the importance of maintaining palm trees, this research focuses on the design of a climbing robot utilizing wheels. The goals of this robot include easy installation on the tree, climbing despite variations in trunk diameter and surface irregularities, maintaining static balance to prevent falling in a stationary state, and enabling tree pruning. Additionally, descending from the tree is an essential capability of this robot. For climbing, a rotating wheel and four auxiliary wheels are employed. A motor with a gearbox drives the rotating wheel, while the auxiliary wheels, supported by spring-lock mechanisms, provide the necessary force to prevent slipping and ensure stable... 

The recent breakthroughs in the lab-on-a-chip technology will not be directly used as clinical devices unless the specific applications are carefully tested and certified. As there is a growing trend towards microfluidic devices for biomedical research, an active microfluidic device was developed. Common microfabrication methods were used to develop a microchip to separate and concentrate live and dead cells based on the dielectrophoresis phenomenon. Unique capabilities of the dielectrophoresis phenomenon make it a powerful tool for micro particle manipulation in micro scale. In this research, geometry for the mentioned purpose is designed and optimized. Three-dimensional microelectrodes are...