Using basic unit testing techniques we found 25 faults in a core component within a larger component oriented framework after the component had already started to be reused. We found that, even though this particular component had been subject to subsystem and system testing and used for some time, several faults were discovered which seriously would have affected applications using it, especia...

Fault analysis poses a serious threat to embedded security devices, especially smart cards. In particular, modeling faults and finding effective practical approaches that are also generic is considered to be of interest for smart card industry. In this work we propose a novel methodology to deal with a difficult question of choosing multiple parameters required for effective faults. To this aim...

Nowadays in industry there many processes where human intervention is replaced by electrical machines, especially induction machines due to his robustness and performance. Although, induction machines are a high reliable device, they are also susceptible to faults. Therefore, the study of induction machine state is essential to reduce human and financial costs. It is presented in this paper an ...

Integration of wind turbine based on doubly fed induction generator (DFIG) into the electrical grid has become an important part of electrical generation in many countries and its importance is continuing to increase. A few of them are various speed generations, the decoupled control of active and reactive power and high power capacity. The current and future wind power situation is modeled as ...

Faults introduced into systems during development are costly to fix, and especially so for business-critical systems. These systems are developed using common development practices, but have high requirements for dependability. This paper reports on an ongoing investigation of fault reports from Norwegian IT companies, where the aim is to seek a better understanding on faults that have been fou...

General functions for human survival and mortality may support a possibility of general mechanisms in human ageing. We discovered that the survival and mortality curves could be described very simply and accurately by the Weibull survival function with age-dependent shape parameter. The age-dependence of shape parameter determines the shape of the survival and mortality curves and tells the nat...

Feed forward neural networks are investigated here for fault diagnosis in chemical processes, especially batch processes. The use of the neural model prediction error as the residual for fault diagnosis of sensor and component is analyzed. To reduce the training time required for the neural process model, an input feature extraction process for the neural model is implemented. An additional rad...

Object-oriented programs cause a shift in focus from software units to the way software classes and components are connected. Thus, we are finding that we need less emphasis on unit testing and more on integration testing. The compositional relationships of inheritance and aggregation, especially when combined with polymorphism, introduce new kinds of integration faults, which can be covered us...

The practical problem. In many practical situations, it is extremely important to be able to detect hidden cracks (and other possible faults) in aerospace and other structures. One way of testing the structural integrity of such structures is by using ultrasonic waves. For thin plates, Lamb waves (which direct the energy along the plate) are especially useful. To use these waves, we set up a tr...

The authors present a sensor for real-time detection of solder-joint faults in programmed, operational Field Programmable Gate Arrays (FPGAs), especially those FPGAs in Ball Grid Array (BGA) packages, such as a XILINX® FG1156 [1]. FPGAs are used in all manner and kinds of control systems in aerospace applications. The ability to sense high-resistance faults in the solder joints of operational F...