New variables for brane-world gravity

Geometric variables naturally occurring in a time-like foliation of brane-worlds are introduced. These consist of the induced metric and two sets of lapse functions and shift vectors, supplemented by two sets of tensorial, vectorial and scalar variables arising as projections of the two extrinsic curvatures. A subset of these variables turn out to be dynamical. Brane-world gravitational dynamics is given as the time evolution of these variables.Comment: 6 pages, to appear in the Proceedings of the Albert Einstein's Century International Conference, Paris 2005 (AIP Conference Proceedings, 2006

Accretion processes in magnetically and tidally perturbed Schwarzschild black holes

We study the accretion process in the region of the Preston-Poisson space-time describing a Schwarzschild black hole perturbed by asymptotically uniform magnetic field and axisymmetric tidal structures. We find that the accretion disk shrinks and the marginally stable orbit shifts towards the black hole with the perturbation. The radiation intensity of the accretion disk increases, while the radius where radiation is maximal remains unchanged. The spectrum is blue-shifted. Finally, the conversion efficiency of accreting mass into radiation is decreased by both the magnetic and the tidal perturbations.Comment: to be published in Phys. Rev. D, 13 pages, 7 figures, 1 tabl

Beszámoló a X. Pedagógiai Értékelési Konferenciáról

A Szegedi Tudományegyetem Neveléstudományi Intézete és Neveléstudományi Doktori Iskolája szervezésében 2012. április 26-28-án rendezték meg a X. Pedagógiai Értékelési Konferenciát (továbbiakban: PÉK). Az idei alkalom nem csak a tíz éves jubileum miatt volt különleges. A konferencia első alkalommal külföldi kutatók számára is meghirdetésre került, így ezzel nemzetközi szakmai konferenciává vált, amin hazai és külföldi kutatók magyar és angol nyelvű előadásait lehet megtekinteni. Beszámolónkban áttekintjük az elmúlt tíz év legfontosabb állomásait, a kialakulás és a fejlődés folyamatát. A kulcsszavak vizsgálatával körvonalazzuk, mely területek voltak a konferencián hangsúlyosak. Ennek megfelelően választottunk ki, a plenáris előadásokon felül, néhány prezentációt, amelyeket röviden bemutatunk, ezzel érzékeltetve a konferencia gazdagságát és szakmai színvonalát

Examining some fields within human resources management

Human resources management is one of the management functions, dealing with people as the essential resource of the organization. This function aims at the most efficient usage of employees in order to realize both organizational and individual goals. Nowadays high significance is attributed to human resources management, since the human factor is the resource that determines the success of an organization. The results of a company are in proportion with the knowledge and talent of the people on its payroll. Human talent and knowledge can be utilized to the greatest extent in case management is able to motivate employees to meet not only the necessary requirements but also to achieve the highest possible results. Human resources management consists of several fields of activities, among which the following are the most important: analysis, planning and assessment of the scope of activities, human resources planning, workforce supply, performance assessment, motivation, developing human resources, labour relations, labour safety, HEM information system. Our studies cover a few fields within human resources management. Our research has been carried out at organizations in Hajdú-Bihar County. The study is based on questionnaires, which have been processed by computers and evaluated using statistical methods