In this paper the connection between the dipole moment tensor D and the spin four-tensor S is formulated in the form of the generalized UhlenbeckGoudsmit hypothesis, D = gSS . It is also found that the spin four-tensor S can be decomposed into two 4-vectors, the usual “space-space” intrinsic angular momentum S, which will be called ‘magnetic’ spin (mspin), and a new one, the “time-space” intrin...

AbstrAct: Merging traditional ways of teaching with modern approaches as e-Learning, focused on online multimedia applications and technologies, developed in a collaborative manner, became a real necessity in order to enhance learning and educational management. In this paper we introduce our developed Education Management Tool (EDM), a visual, interactive and collaborative e-Learning solution,...

the entanglement at zero-temperature is studied in a two-qubit xz spin-1/2 chain model in anexternal magnetic field which is applied in the z direction. we have obtained an analytical relation forthe effect of the external magnetic field on the concurrence. it is shown that the ground state of thesystem depends on the strength of exchange coupling. we have shown that the analytical relation oft...

Harnessing information technology to manage documents is one of the most important challenges facing IS managers in this decade. It is important because most of the valuable information in organizations is in the form of documents such as business forms, reports, letters, memos, policy statements, contracts, agreements, etc. Moreover, most of the important business processes in organizations ar...

Rechargeable batteries are essential for the increased demand energy storage technologies due to their ability adapt intermittent renewable energies into electric devices, such as vehicles. To boost battery performance, applying external fields assist electrochemical process has been developed and exhibits significant merits in efficiency cycle stability enhancement. This perspective focuses on...

Computer-based learning systems can now keep detailed logs of user-system interactions, including key clicks, eye-tracking, and video data, opening up new opportunities to study how students learn with technology. Educational Data Mining (EDM; Romero, Ventura, Pechenizkiy, & Baker, 2010) is concerned with developing, researching, and applying computerized methods to detect patterns in large col...

aims: arsenic contamination of natural water resources has become an important environmental problem in the world. the adsorption method by iron filings adsorbent or zero-valent iron was used. the study aimed to evaluate the efficiency of iron filings in arsenite removal from polluted water and to investigate the effect of magnetic field on the process. materials & methods: this interventional ...

in order to compare effect of magnetic field and frigate surfactant to enhance the efficacy of iodosulfuron-methyl-sodium plus mesosulfuron-methyl (chevalier) to control wild oat, a greenhouse experiment of dose-response was conducted. treatments were 0, 3, 6, 12, 18 and 24 doses g a.i. ha-1 of chevalier (i) without treatment, (ii) with frigate % 0.1 v/v, (iii) with magnetic field, and (iv) fri...