Research ArticleOpen accessIn the keywordsStructural Dynamics of the Distribution Mechanism with Rocking Tappet with RollFlorian Ion T. Petrescu, John Kaiser Calautit, Dragan MarinkovicIn this study, the authors present a new method to dynamically synthesize a mechanism with rotary cam and rotated tappet with roll, used with priority at the distribution mechanisms from the heat engines with internal combustion. This type of distribution can improve the changes of gases and may decrease significantly the level of vibration, noises and emissions. As long as … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 4 · 28 Oct 2015 · 9,290 accessesView PDFCite
Research ArticleOpen accessIn the keywordsMODELING THE UNIVERSE AS A QUANTUM WELLMichael Harney, Julie SealBy modeling the Universe as a quantum well for standing waves and solving Schrodinger’s equation for a particle trapped in this well, the solutions for the allowable rest-energies of all particles in the Universe are obtained, from the mass of the photon up to the mass of the Universe. The quantum numbers that predict the allowable rest-energies of all particles … …Physics International, Vol. 5, Issue 1 · 19 Mar 2014 · 8,241 accessesView PDFCite
Research ArticleOpen accessIn the keywordsStrategy in Turbulent Environment: A Case Study of Indian Domestic CompanySapna A. Narula, K.M. UpadhyayProblem statement: This case deled with an Indian pesticide company in the turbulent environment, which had to adopt a strategic shift due to changing environmental factors such as increasing competition from multinationals, regulatory forces, changing technologies. The case presented environmental situation in the industry and also described the events which led to the turbulency. Approach: This is a teaching case … …American Journal of Economics and Business Administration, Vol. 2, Issue 2 · 30 Jun 2010 · 8,064 accessesView PDFCite
Research ArticleOpen accessIn the keywordsSome Basic Reactions in Nuclear FusionRelly Victoria Virgil Petrescu, Aversa Raffaella, Samuel Kozaitis et al.Over time it has advanced the idea that the achievement of a hot nuclear reaction can require tens or hundreds of millions of degrees. Precise calculations clearly indicate a much higher temperature. At least 10 million degrees are necessary for 1 keV in thermonuclear reaction. At 400 keV it needs a temperature of 4000 million degrees to occur the hot … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 3 · 20 Jul 2017 · 8,880 accessesView PDFCite
Research ArticleOpen accessIn the keywordsSome Proposed Solutions to Achieve Nuclear FusionRelly Victoria Virgil Petrescu, Aversa Raffaella, Samuel Kozaitis et al.Despite research carried out around the world since the 1950s, no industrial application of fusion to energy production has yet succeeded, apart from nuclear weapons with the H-bomb, since this application does not aims at containing and controlling the reaction produced. There are, however, some other less mediated uses, such as neutron generators. The fusion of light nuclei releases enormous … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 3 · 20 Jul 2017 · 8,836 accessesView PDFCite
Research ArticleOpen accessIn the keywordsA Dynamic Model for GearsAversa Raffaella, Relly Victoria V. Petrescu, Antonio Apicella, Florian Ion T. PetrescuNearly all models studying the dynamic of gearing with parallel axes are based on classical mechanical models and known which are studying the spinning vibration of shafts gears and determine their own beats and strains of shafts spinning. These classical dynamic models are very useful, but they didn't take in consideration the dynamic events formed between the two teeth in … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 2 · 10 May 2017 · 7,644 accessesView PDFCite
Research ArticleOpen accessIn the keywordsSomething about the V Engines DesignRaffaella Aversa, Relly Victoria Petrescu, Antonio Apicella et al.First time the corresponding author has studied these problems of motors in V, in the framework of some contracts made with the research collective of UPB and "Autobuzul" plant, in years 1980-1986. In the first phase, have been studied the vibrations and noises of an engine in V, their transmissibility from the engine to the chassis and the cab driver … …American Journal of Applied Sciences, Vol. 14, Issue 1 · 31 Dec 2016 · 8,861 accessesView PDFCite
Research ArticleOpen accessIn the keywordsAbout the Gear Efficiency to a Simple Planetary TrainRelly Victoria V. Petrescu, Raffaella Aversa, Antonio Apicella, Florian Ion T. PetrescuSynthesis of classical planetary mechanisms is usually based on kinematic relations, considering the achieved transmission ratio input-output. The planetary mechanisms are less synthesized based on their mechanical efficiency which is developed during operation, although this criterion is part of the real dynamics of mechanisms and also the most important criterion in terms of performance of a mechanism. Even when the … …American Journal of Applied Sciences, Vol. 13, Issue 12 · 23 Dec 2016 · 8,811 accessesView PDFCite
Research ArticleOpen accessIn the keywordsTHE PROPERTIES OF NUCLEAR MATTERKhaled Hassaneen, Hesham MansourThe microscopic and bulk properties of nuclear matter at zero and finite temperatures are studied in the frame of the Brueckner theory. The results for the symmetry energy are also obtained using different potentials. The calculations are based on realistic nucleon-nucleon interactions which reproduce the nucleon-nucleon phase shifts. These microscopic approaches are supplemented by a density-dependent contact interaction to achieve … …Physics International, Vol. 4, Issue 1 · 17 Jul 2013 · 7,230 accessesView PDFCite
Research ArticleOpen accessIn the keywordsEnvironmental Factors Influence on Mobile Learning BusinessAlireza Nasiri, Guishi DengProblem statement: Recently, there has been growing interest in m-learning consequently emerging m-learning technology is promising technological and educational business. Nevertheless, m-learning is a new business and the different actors are still trialing by ways of a diversity of business models to overcome in able to achieve a sustainable and profitable place in this market. Numbers of m-learning products providers … …American Journal of Applied Sciences, Vol. 6, Issue 6 · 30 Jun 2009 · 6,967 accessesView PDFCite