http://segnalo.alice.it/iontiberiu it-it info@segnalo.com info@segnalo.com http://segnalo.alice.it/url.html.php?us=3fa8d80dd16ceb57a60c90b1780cf83b This book aims to achieve a scientific group known like planetary type mechanisms. Constructively, structurally and kinematically, the planetary mechanisms (the planetary trains) are generally composed of spur gears and bars. In premiere, the book determines the real efficiency of the planetary trains. Automatic transmissions have been added slowly from airplanes to automobiles, and were then generalized to various vehicles. By using the formulas indicated in this book for calculating dynamics of planetary mechanisms, used in aircraft and vehicles, the automatic transmissions can be achieved better than those known today. The book is written in romanian. http://segnalo.alice.it/url.html.php?us=582e847e86d099d7bf379bf8681e3f98 About Victoria Petrescu Author Image Nihil Sine Deo Ph.D. Eng. Relly Victoria PETRESCU Senior Lecturer at UPB (Bucharest Polytechnic University), GDGI Department. http://segnalo.alice.it/url.html.php?us=afb15675aa19907df2547320b29b3fc8 TURN ON THE LIGHTS! (BOOK) ISBN 978-1-4475-2395-6 ISBN 978-1-4475-2395-6 Welcome! A Short Book Description: This book, try a vision about the tomorrow Earth's energies. Besides the traditional energies, are presented and possible new energies source. The author presents shortly, the annihilation process, which can donate energies obtained by the annihilation process between a particle and its antiparticle. Practically it proposes obtaining energy by the process of annihilation of matter with the antimatter. Another proposed method is the acquiring energy from the source and retransmitting it on the Earth in concentrated form. http://segnalo.alice.it/url.html.php?us=55712a152ce9e393dfef5d8319cfa63f Gear Drives, history and evolution. Performing cylindrical-conical surfaces. Intersections of cones. Spindle. Valves. Flanges. A profile in long. Descriptive Geometry as a branch of Projective Geometry. http://segnalo.alice.it/url.html.php?us=4e3763d600331a256fade76e6dcc3d3d Descriptive Geometry as a branch of Projective Geometry http://segnalo.alice.it/url.html.php?us=7d88ffa9919d3815ea4914300e403853 The Florian PETRESCU's Books Store http://segnalo.alice.it/url.html.php?us=984dca9f5dd62069531651bc095eb7df Development and diversification of machines and mechanisms with applications in all areas of scientific research requires new systematization and improvement of existing mechanical systems by creating new mechanisms adapted to the modern requirements; the gearing mechanisms are found today everywhere: in the industry of machinery construction, in energy industry, in aeronautics and aerospace, in electronics& Electrical, in oil industry, in mechatronics and robotics, etc. In this context this book attempts to bring a contribution to science and technology applied in the kinematic and dynamic analysis and synthesis of mechanisms with gearings. The book presents an original method to determine the efficiency of the gearing; the originality of this method relies on the eliminated friction modulus. With the relations presented in this paper, one can synthesize the gear’s mechanisms; the best efficiency can be obtained with the internal gearing when the drive wheel 1 is the ring. http://segnalo.alice.it/url.html.php?us=494f5cf31e9aef5711f6b725004eaaa4 Mechanical Systems, Serial and Parallel Short description This paper is a scientific view, uniform, general, comprehensive and unbiased of the main problems posed by mechanical systems, mobile, serial and parallel. It gives an overview, followed by geometric and kinematic study of the serial and parallel structures. It continues with an introduction in the dynamics these systems. At the serial systems are studied both direct and indirect kinematics, while at the parallel systems is studied only indirect kinematics (this being more useful). Presentation is closely linked of the basic methods of calculating the matrix, which are introduced step by step for a easy understanding of the each sequence. The book is divided into 14 chapters, who have been based on our courses, prepared for our students of the next disciplines: mechatronics, industrial robots, manipulators, automated welding, etc.. The paper is addressed equally to all specialists and to all future specialists which are working in these areas. The book is written in Romanian. Author Bio PhD. Eng. Florian Ion PETRESCU, Senior Lecturer at UPB (Bucharest Polytechnic University), TMR (Theory of Mechanisms and Robots) Department, Bucharest, ROMANIA, Europe; PhD. Eng. Relly Victoria PETRESCU, Senior Lecturer at UPB (Bucharest Polytechnic University), GDGI (Descriptive Geometry and Engineering Graphics) Department, Bucharest, ROMANIA, Europe. http://segnalo.alice.it/url.html.php?us=8ee4ce87da2c738d71f36f81ab199122 We can extract the energy of the rest mass of an electron. For a pair of an electron and a positron this energy is circa 1 MeV. The "synchrotron radiation (synchrotron light source)" produces deliberated a radiation source. Electrons are accelerated to high speeds in several stages to achieve a final energy (that is typically in the GeV range). We need two synchrotrons, a synchrotron for electrons and another who accelerates positrons. The particles must to be collided, after they are being accelerated to an optimal energy level. All the energies are collected at the exit of the Synchrotrons, after the collision of the opposite particles. We will recover the accelerating energy, and in addition we also collect the rest energy of the electrons and positrons. At a rate of 10^19 electrons/s we obtain an energy of about 7 GWh / year, if even are produced only half of the possible collisions. This high rate can be obtained with 60 pulses per minute and 10^19 electrons per pulse, or with 600 pulses per minute and 10^18 electrons per pulse. If we increase the flow rate of 1,000 times, we can have a power of about 7 TWh / year. This type of energy can be a complement of the fusion energy, and together they must replace the energy obtained by burning hydrocarbons. Advantages of the annihilation of an electron with a positron, compared with the nuclear fission reactors, are disposal of radioactive waste, of the risk of explosion and of the chain reaction. Energy from the rest mass of the electron is more easily controlled compared with the fusion reaction, cold or hot. Now, we don't need of enriched radioactive fuel (as in nuclear fission case), by deuterium, lithium and of accelerated neutrons (like in the cold fusion), of huge temperatures and pressures (as in the hot fusion), etc. http://segnalo.alice.it/url.html.php?us=e79dca906ee9f326662172a185d0ed48 We can extract the energy of the rest mass of an electron. For a pair of an electron and a positron this energy is circa 1 MeV. The "synchrotron radiation (synchrotron light source)" produces deliberated a radiation source. Electrons are accelerated to high speeds in several stages to achieve a final energy (that is typically in the GeV range). We need two synchrotrons, a synchrotron for electrons and another who accelerates positrons. The particles must to be collided, after they are being accelerated to an optimal energy level. All the energies are collected at the exit of the Synchrotrons, after the collision of the opposite particles. We will recover the accelerating energy, and in addition we also collect the rest energy of the electrons and positrons. At a rate of 10^19 electrons/s we obtain an energy of about 7 GWh / year, if even are produced only half of the possible collisions. This high rate can be obtained with 60 pulses per minute and 10^19 electrons per pulse, or with 600 pulses per minute and 10^18 electrons per pulse. If we increase the flow rate of 1,000 times, we can have a power of about 7 TWh / year. This type of energy can be a complement of the fusion energy, and together they must replace the energy obtained by burning hydrocarbons. Advantages of the annihilation of an electron with a positron, compared with the nuclear fission reactors, are disposal of radioactive waste, of the risk of explosion and of the chain reaction. Energy from the rest mass of the electron is more easily controlled compared with the fusion reaction, cold or hot. Now, we don't need of enriched radioactive fuel (as in nuclear fission case), by deuterium, lithium and of accelerated neutrons (like in the cold fusion), of huge temperatures and pressures (as in the hot fusion), etc. http://segnalo.alice.it/url.html.php?us=6155c18b657037f8b5b3e60c87382d63 Some articles about new technology. http://segnalo.alice.it/url.html.php?us=015838ef1fea0eb9b27b84195103ed95 ©2010 Florian Ion PETRESCU - Obtaining Energy by the Annihilation of an Electron with a Positron http://segnalo.alice.it/url.html.php?us=e16a4c2ccd1913f1e64888fda0d00409 Imobiliare http://segnalo.alice.it/url.html.php?us=1268f939b855bc788c9c02ff59ffb8db Land for sale http://segnalo.alice.it/url.html.php?us=8e2007069266f529c8d97929aef218d3 The Aircraft of tomorrow http://segnalo.alice.it/url.html.php?us=ff85826356d5924af75aca390df4cb71 New Aircraft http://segnalo.alice.it/url.html.php?us=5b37ee9a547bcce850c1dee61880c166 V-Engines-Design, Otto-motors-design http://segnalo.alice.it/url.html.php?us=cbd38e47054f6aa95e8907ee10f2820c Master TMR http://segnalo.alice.it/url.html.php?us=4cc712361e81e4814fd917a0dd90d10d WHO ARE US? 1-WE WERE T M M (MECHANISMS AND MACHINES THEORY), AND NOW WE ARE T M R (MECHANISMS AND ROBOTS THEORY) CHAIR, 2-WE ARE THE FOUNDER OF A R o T M M (ROMANIAN ASSOCIATION ON MACHINES AND MECHANISMS THEORY), 3-WE ARE ONE OF THE 13 FOUNDERS OF IFToMM (INTERNATIONAL FEDERATION FOR MACHINES AND MECHANISMS THEORY), 4-WE ARE THE FOUNDER OF A R R (ROMANIAN ROBOTICS ASSOCIATION), TODAY S R R (ROMANIAN ROBOTICS SOCIETY). OUR LOCATION: R O M A N I A, B U C H A R E S T, U P B http://segnalo.alice.it/url.html.php?us=3efba5dc9eeb322796da5d3998b1a69d WHO ARE US? 1-WE WERE T M M (MECHANISMS AND MACHINES THEORY), AND NOW WE ARE T M R (MECHANISMS AND ROBOTS THEORY) CHAIR, 2-WE ARE THE FOUNDER OF A R o T M M (ROMANIAN ASSOCIATION ON MACHINES AND MECHANISMS THEORY), 3-WE ARE ONE OF THE 13 FOUNDERS OF IFToMM (INTERNATIONAL FEDERATION FOR MACHINES AND MECHANISMS THEORY), 4-WE ARE THE FOUNDER OF A R R (ROMANIAN ROBOTICS ASSOCIATION), TODAY S R R (ROMANIAN ROBOTICS SOCIETY). OUR LOCATION: R O M A N I A, B U C H A R E S T, U P B