Conformal Invariance and Quantum Aspects of Matter

The vacuum sector of the Brans-Dicke theory is studied from the viewpoint of a non-conformally invariant gravitational model. We show that, this theory can be conformally symmetrized using an appropriate conformal transformation. The resulting theory allows a particle interpretation, and suggests that the quantum aspects of matter may be geometrized.Comment: 6 page

Explaining the Role of Ngos in the Development of Environmental Law

Development is a process that coordinates people's and government's attempt to improve social, cultural and economic condition in any location and enables them all to participate in national progress and this terminology can be considered as an important process to teach people to participate in taking group decisions and in the meanwhile to take responsibilities which is in fact the same as Cooperative Development. This cooperative approach is supported by managers and intellectuals as the object. They claim that terminology should be considered as one of the main humans rights and should be supported in form of a goal and in its particles not for its results. NGOs as part of civil society's organs (CSOs) play significant role in realization of social development objectives. In situations when societies were not successful in solving environmental, developmental and welfare problems, NGOs were selected as shortcuts to pass development road. In those articles, the researcher first studied the importance of the role of NGOs in development and then evaluated the performance of these organizations in relation with development of environmental laws

Incorporating Betweenness Centrality in Compressive Sensing for Congestion Detection

This paper presents a new Compressive Sensing (CS) scheme for detecting network congested links. We focus on decreasing the required number of measurements to detect all congested links in the context of network tomography. We have expanded the LASSO objective function by adding a new term corresponding to the prior knowledge based on the relationship between the congested links and the corresponding link Betweenness Centrality (BC). The accuracy of the proposed model is verified by simulations on two real datasets. The results demonstrate that our model outperformed the state-of-the-art CS based method with significant improvements in terms of F-Score

Constraints on scalar-tensor theories from observations

We study the dynamical description of scalar-tensor gravity by performing the best-fit analysis for two cases of exponential and power-law form of the potential and scalar field function coupled to the curvature. The models are then tested against observational data. The results show that in both scenarios the Universe undergoes an acceleration expansion period and the geometrical equivalent of dark energy is associated with a time-dependent equation of state.Comment: 16 pages, 32 figure

A NON-ISOLATED HIGH STEP-UP CONVERTER WITH LOW RIPPLE INPUT CURRENT AND REDUCED VOLTAGE STRESS

In this paper a new non-isolated high step-up interleaved cascade converter is presented. In comparison with the conventional cascade boost converter, the proposed converter has a higher voltage gain, lower input current ripple and reduced voltage stress for the switches and diodes. Besides, unlike the conventional cascade boost converter, in the proposed converter the input current is shared between inductors and hence the converter can be implemented with lower current rated inductors. Thus, the converter size and conduction losses are reduced and the efficiency is increased. The proposed converter is analyzed and experimental results of a 200W laboratory prototype are presented

AVICENINA MEDICINSKA DIDAKTIČKA PJESMA: URJUZEHTEBBI

Historical research shows that many physicians experienced in medical sciences are also talented in art, literature and poetry. Avicenna was a sage who was skilled in poetry in addition to philosophy and medicine. He wrote two different types of poetry: those meant to be enjoyed for their literary qualities of novelty and imagination, and his didactic Urjuzeh. Didactic poems are different from poetry evoked by imagination and feeling. In didactic poetry, the poets want to learn science and philosophy, whether spiritual, ethical or practical to the readers. Rhyme and poetry were often used for scientific writing in Avicenna’s era, and were considered a method for memorizing scientific information and raising students’ interest in difficult scientific concepts. Verse was used to simplify the didactic content, ease memorization and make difficult scientific issues more attractive. In medieval Persia, students of medicine had learned the basics of philosophy before starting medical courses. Poetry could help the students memorize the poem itself in combination with its meaning, in a way that was better and easier than prose. Avicenna’s masterpiece, UrjuzehTebbi, comprises a perfect course in traditional Persian medicine in rhyming text written in Arabic. This great work was translated into Persian at the research centre for traditional medicine and history of medicine. We hope that the Persian translation of Urjuzeh Tebbi will allow students and experts to better appreciate the role of didactic poems in compiling and transmitting the concepts of Iranian medicine.Povijesna istraživanja ukazuju da su mnogi liječnici, iskusni u medicinskim znanostima, također talentirani za umjetnost, književnost i pjesništvo. Avicena je bio mudrac koji je bio vješt u pjesništvu nastavno na filozofiju i medicinu. Pisao je dvije vrste pjesama: one koje su bile namijenjene uživanju u književnoj kvaliteti originalnosti i imaginacije te njegova didaktička poema Urjuzeh. Didaktičke poeme razlikuju se od pjesništva evociranog imaginacijom i osjećajem. U didaktičkom pjesništvu pjesnici žele podučiti čitatelje znanosti i filozofiji, bilo spiritualno, etički ili praktički. U Avicenino vrijeme srok i pjesništvo često su korišteni za znanstveno pisanje i smatrani su metodom zapamćivanja znanstvenih informacija i podizanja studentova interesa za teške znanstvene pojmove. Stih je korišten za pojednostavnjenje didaktičkog sadržaja, olakšanje zapamćivanja i činjenja teških znanstvenih pitanja pristupačnijima. U srednjovjekovnoj Perziji student je medicine morao naučiti osnove filozofije prije negoli je započeo medicinsku poduku. Pjesništvo je moglo pomoći studentu upamtiti samu pjesmu u kombinaciji s njenim značenjem, na način koji je bio bolji i lakši negoli je to kod proze. Avicenino remek-djelo UrjuzehTebbi uključuje savršenu poduku u tradicionalnoj perzijskoj medicini u rimovanu tekstu pisanu na arapskom. Ovo veliko djelo bilo je prevedeno na perzijski pri centru za istraživanje tradicionalne medicine i povijesti medicine. Nadamo se da će perzijski prijevod Urjuzeh Tebbi omogućiti studentima i stručnjacima bolje uvažavanje uloge didaktičkih poema u sabiranju i prenošenju pojmova iranske medicine