Prediction of reliability of broadcasting transmitter systems

This paper shows that the SPICE circuit simulation program is a useful tool for predicting the reliability of broadcasting transmitters. A broadcasting system formed of two transmitters fed from a common power supply unit is considered as a vehicle to illustrate the use of the proposed technique. Agreement between the steady-state probabilities obtained using the proposed technique are compared with results obtained using the Laplace transform metho

Applications of SPICE simulation software to the study of reliability and availability in electrical engineering education

The effectiveness of SPICE in calculating probabilities, reliability, steady-state availability, and mean time to failure of repairable systems described by Markov models is demonstrated. Two examples are presented. The first example is a two-unit, warm standby, microcomputer system with self-reset function and repair facility. The second example is a robotic system comprising two identical robots and one safety system. In both cases, the results obtained using SPICE are compared with previously published results obtained using the Laplace transform method. Full SPICE listings are included

ANFIS TVA Power Plants Availability Modeling Development

In the present chapter, the evaluation of the Tennessee Valley Authority (TVA) Markov model transient behavior is derived and studied. It is focused on finding the models of the transient-state availability and unavailability of the four (TVA) models among using an adaptive neuro-fuzzy inference system (ANFIS). The developed ANFIS model for the TVA models is derived, and both availability and unavailability of the four TVA models are derived using the curve fitting technique, where each model of the transient availability of the three-state models of the TVA models is found. Each model is considered as a three-state model, and its equations obtained using the curve fitting technique are helping for the future availabilities and unavailabilities. The availability is a very important measure of performance for the availability of TVA power plants. The technique is used and applied on the four models in the present study to formulate and obtain the TVA models’ results and are compared. In addition, the generation effects on the reliability investigation. The generation study evaluates the improvement in reliability over a time

Prediction of reliability of broadcasting transmitter systems

This paper shows that the SPICE circuit simulation program is a useful tool for predicting the reliability of broadcasting transmitters. A broadcasting system formed of two transmitters fed from a common power supply unit is considered as a vehicle to illustrate the use of the proposed technique. Agreement between the steady-state probabilities obtained using the proposed technique are compared with results obtained using the Laplace transform metho

Exploring the relationship between sense of ownership and employee behavior in an organization: A study on siemens pakistan

In order to get success in competitive business environment, organizations emphasize on maintaining productive and motivated workforce within their offices and Sense of Ownership has been considered as key tool to achieve this. The term “sense of ownership” is frequently cited as a significant characteristic of employee behavior. While there is increasing use of the terms ownership or sense of ownership, there is a paucity of research regarding what these terms mean, how this body of knowledge influences employee behavior, and the various approaches that can be applied in contemporary research and practice. A sense of ownership in an organization described as a concept through which employee feel like an owner while performing their jobs and have influence over decisions, and take responsibility for the outcome. Applying the concept of ownership can increase the productivity and also help to develop motivated environment in the organization. Sense of ownership incorporates personalization, sense of control, territoriality, and involvement. In addition, the potential for ownership can be understood in part by examining the capacity for and quality of trust. Implications are discussed regarding how this sense of ownership advances in modern day organizational environment and how relevant employees consider it for their behavior in the organization and what sort of implementations organization should do to nurture this feeling

Applications of SPICE simulation software to the study of reliability and availability in electrical engineering education

The effectiveness of SPICE in calculating probabilities, reliability, steady-state availability, and mean time to failure of repairable systems described by Markov models is demonstrated. Two examples are presented. The first example is a two-unit, warm standby, microcomputer system with self-reset function and repair facility. The second example is a robotic system comprising two identical robots and one safety system. In both cases, the results obtained using SPICE are compared with previously published results obtained using the Laplace transform method. Full SPICE listings are included

Empiric transcatheter arterial embolization for massive or recurrent gastrointestinal bleeding: Ten-year experience from a single tertiary care center

Purpose In patients with massive or recurrent gastrointestinal bleeding (GIB) which is not amenable to endoscopic therapy, angiographic interventions are often employed. We report our ten-year experience of empiric transcatheter arterial embolization (TAE) for patients with massive or recurrent GIB. Methods All patients who had undergone empiric TAE at our hospital between March 2004 and June 2015 were identified using the institutional radiology information system. A retrospective chart review was performed using a structured pro forma. Technical success rate, 30-day clinical success rate, 30-day mortality rate, and rate of procedural complications were computed. Statistical analysis was performed using Statistical Package for Social Sciences (SPSS) version 20. Results A total of 32 patients had undergone empiric TAE for GIB during the study period. The median age of subjects was 56 years and two-thirds of them were male (68.7%). Gastroduodenal (n=24), ileocolic (n=3), left gastric (n=2), right gastroepiploic (n=1), and branches of superior and middle rectal arteries (n=1) were embolized using microcoils (n=25), polyvinyl alcohol particles (n=25), and gelatin sponge (n=3)--either alone or in combination. Technical and 30-day clinical success rates were 96.9% (31/32) and 71.9% (23/32), respectively. The 30-day mortality rate for our cohort was 21.9% (7/32). One patient developed re-bleeding at two days after the initial procedure and required repeat embolization. Coil migration (n=3) and access site hematoma (n=1) were the observed procedural complications. Conclusion Empiric TAE can be a useful treatment option for selected patients with massive or recurrent GIB that is not amenable to endoscopic therapy

The Impact of Employee Empowerment on Managerial Creativity: An Empirical Study in the Ministry of Information Affairs in the Kingdom of Bahrain

The present study aimed to examine the impact of the employee empowerment (delegation authority, teamwork, training and motivation) on managerial creativity in in the Ministry of Information Affairs in the Kingdom of Bahrain. The research adopted the descriptive research design and the quantitative approach to answer the research questions and to test the hypotheses. The population of this study is a total of 1528 employees in the Ministry of Information Affairs in the Kingdom of Bahrain. For the purpose of this research, questionnaire as a data collection tool which was prepared based on previous studies that dealt with the research variables where it was distributed to 320 workers through self-administered survey. Overall, a total of 300 employees responded giving a response rate (94%). The analysis was conducted using multiple and simple regression to test the hypotheses. The results of this study indicated that the employee empowerment have significant impact on managerial creativity. Furthermore, the results revealed that delegation of authority had the highest impact on employee empowerment, while the training had the lowest impact on employee empowerment. This study contributes to the body of knowledge by providing empirical evidence to support the relationship between employee empowerment and managerial creativity. The present study provides the number of conclusions, recommendations and future studies

Spark plug failure detection using Z-freq and machine learning

Preprogrammed monitoring of engine failure due to spark plug misfire can be traced using a method called machine learning. Unluckily, a challenge to get a high-efficiency rate because of a massive volume of training data is required. During the study, these failure-generated were enhanced with a novel statistical signal-based analysis called Z-freq to improve the exploration. This study is an exploration of the time and frequency content attained from the engine after it goes under a specific situation. Throughout the trial, the misfire was formed by cutting the voltage supplied to simulate the actual outcome of the worn-out spark plug. The failure produced by fault signals from the spark plug misfire were collected using great sensitivity, space-saving and a robust piezo-based sensor named accelerometer. The achieved result and analysis indicated a significant pattern in the coefficient value and scattering of Z-freq data for spark plug misfire. Lastly, the simulation and experimental output were proved and endorsed in a series of performance metrics tests using accuracy, sensitivity, and specificity for prediction purposes. Finally, it confirmed that the proposed technique capably to make a diagnosis: fault detection, fault localization, and fault severity classification