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1 – 3 of 3Nebojsa B. Raicevic and Nikola Raicevic
Underground cables can produce higher electromagnetic fields directly above them than an overhead line. The majority of cable failures on distribution system are caused by defects…
Abstract
Purpose
Underground cables can produce higher electromagnetic fields directly above them than an overhead line. The majority of cable failures on distribution system are caused by defects in the cable accessories. Nowadays, significant research has been carried out worldwide into examining whether electricity, and in particular, the presence of electric and magnetic fields have an adverse impact on health, especially the occurrence of cancer and childhood leukemia. The purpose of this paper is to optimize the electric field distribution in underground cable accessories. This reduces the impact of the harmful effects of the fields on living beings and humans.
Design/methodology/approach
Cable terminations and joints are designed to eliminate the stress concentration at the termination screen to avoid the breakdown of the cable and high values of electric field at these points. Any improvement in the cable termination and joints construction is of great interest. There are several methods for the solution of electric field distribution. These can be summarized as analytical, experimental, free-hand field mapping, analogue methods and numerical methods. In this paper cable accessories are modeled by using multilayer dielectric system and very thin deflector’s cones.
Findings
This model includes specific insulators design and smart choice of electrodes position. Stress-grading nonlinear materials in form of tapes and tubes were used with much success. In order to optimize the cable joint parameters, two criteria were monitored – total electric field magnitude and magnitude of the tangential component. More than 30 percent is reduced impact of cables on the environment.
Originality/value
In order to investigate the accuracy of the applied numerical model, various configurations of the cable accessories are studied. The first time is applied new Hybrid Boundary Elements Method on the protection of the environment.
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Nikola Ćurčić, Aleksandar Grubor and Vuk Miletić
Human resources (HR) are undoubtedly one of the most important factors of any organization. That is why making decisions on the HR policy is becoming a very sensitive issue, both…
Abstract
Human resources (HR) are undoubtedly one of the most important factors of any organization. That is why making decisions on the HR policy is becoming a very sensitive issue, both when hiring adequate candidates for the job and during the process work, i.e., during training and development of employees who work in the organization. The purpose of this study was to investigate the importance of HR and decisions on the HR policy as the premise for generating the organization’s expected business excellence. The starting assumption of this chapter is that appropriate decisions on the HR policy are predictors of engaging adequate employees and managing their potentials on the right way. The research is directed toward identifying differences in decisions on the personnel policy in organizations from Serbia that have different decision-makers and different management styles, which are directly related to their business success. Apart from the decision-maker, a significant role in profiling an organization’s personnel should also be done by the Human Resource Department, who take part in recruiting, selecting for education, building, and motivating personnel. In order to confirm the starting assumption, the comparative analysis method, the synthesis method, and the multiple comparison and statistical test methods are used.
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