Author

Florian Ion Tiberiu Petrescu

Theory of Mechanisms and Robots, Bucharest Polytechnic University, Romania

151 articles in our journals

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Research ArticleOpen accessPresenting a New Equation that Accurately Determines the Size of a Moving Elementary ParticleFlorian Ion Tiberiu PetrescuThe paper briefly presents a new Eq. (9). The role of Eq. (9) is to accurately determine the size of a moving elementary particle, depending on its velocity (or particle energy). Although Eq. (9) has a general character, it can be applied to any elementary particle in motion to determine the size of that particle, in the study, it was … …American Journal of Applied Sciences, Vol. 19, Issue 1 · 24 Nov 2022 · 6,475 accessesView PDF Cite

Research ArticleOpen accessAn Assumption Regarding the way Matter is Constituted and Structured from LightFlorian Ion Tiberiu PetrescuThe paper briefly presents some basic ideas on how matter is constituted and structured, based on permanent light as intrinsic energy. The fact that photons cannot be stored directly inside matter has not prevented it from having multiple hearts of energy springing from light, in the form of positive and negative electrical charges, which form the energy base of matter … …American Journal of Engineering and Applied Sciences, Vol. 15, Issue 2 · 8 Jun 2022 · 6,271 accessesView PDF Cite

Review ArticleOpen accessAbout the Cyanobacteria and StromatolitesFlorian Ion Tiberiu Petrescu, Liviu Marian UngureanuStromatolites are layered biochemical accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains in biofilms (specifically microbial mats), especially cyanobacteria. Stromatolites occur widely in the fossil record of the Precambrian but are rare today. Life on Earth was born at least 3.7 billion years ago, but since then the number of living things has … …OnLine Journal of Biological Sciences, Vol. 22, Issue 1 · 17 Feb 2022 · 8,230 accessesView PDF Cite

Research ArticleOpen accessKinetostatics of a 2T9R Robot MechanismFlorian Ion Tiberiu Petrescu, Adriana ComanescuThe paper presents in detail a method of calculating the forces acting on a 2T9R type robot. In order to determine the reactions (forces in the kinematic couples), one must first determine the inertial forces in the mechanism to which one or more useful loads of the robot can be added. The torsor of the inertia forces is calculated with … …American Journal of Engineering and Applied Sciences, Vol. 15, Issue 1 · 12 Feb 2022 · 6,903 accessesView PDF Cite

Research ArticleOpen accessOne can Achieve the Nuclear Fission Reaction of Lithium by Accelerated Hydrogen Nuclei or NeutronsRelly Victoria Virgil Petrescu, Florian Ion Tiberiu PetrescuThe idea circulated among physicists that in the upper area of the physical elements the fission reaction can be obtained and in the lower one the fusion reaction occurs. In the presented paper we want to impose another rule, namely the obtaining in the lower part of the physical elements of the fission and fusion nuclear reactions, with the obvious … …American Journal of Engineering and Applied Sciences, Vol. 14, Issue 3 · 7 Sep 2021 · 9,516 accessesView PDF Cite

Review ArticleOpen accessNews in Bone Modeling for Customized Hybrid Biological Prostheses DevelopmentRelly Victoria Virgil Petrescu, Raffaella Aversa, Valeria Perrotta et al.The complex biomechanics and morphologies of the femur proximal epiphysis are presented. The nature and fine morphology of the femur head and its structural behavior have been investigated. Isotropic and orthotropic trabecular structures have been associated with oriented compression and tensioned areas of the femur head FEM models. These isotropic/orthotropic trabecular morphologies and their allocations govern the stress and strain … …OnLine Journal of Biological Sciences, Vol. 21, Issue 2 · 14 Jun 2021 · 6,351 accessesView PDF Cite

Research ArticleOpen accessKinematics of the Basic Mechatronic Module 3R of an Anthropomorphic RobotFlorian Ion Tiberiu PetrescuThe kinematics of the basic mechatronic module 3R of an anthropomorphic robot will be presented in this study, through an original geometric-analytical method, developed by the author. The advantages of the proposed new method are a great simplicity of calculations and calculation relations, intertwined with very high precision. The method is a strong one from a physical-mathematical point of view. … …American Journal of Engineering and Applied Sciences, Vol. 14, Issue 1 · 8 Feb 2021 · 7,454 accessesView PDF Cite

Review ArticleOpen accessSome Aircraft Considered New in 2020Florian Ion Tiberiu PetrescuThe paper briefly presents some models of aircraft considered avant-garde in 2020 and it is part of the reviews on news in aviation and aerospace. It briefly presents some basic features, news and more important data for each new model on display, so that the reader can get an image of that model but also an overall one, to compare … …American Journal of Engineering and Applied Sciences, Vol. 13, Issue 4 · 22 Dec 2020 · 7,464 accessesView PDF Cite

Research ArticleOpen accessA Theory that Wants to Obtain Particles Opposite to Protons, Having a Negative ChargeRelly Victoria Virgil Petrescu, Florian Ion Tiberiu PetrescuThe present paper focuses on the possibility of obtaining antimatter, in the main purpose of then extracting massive energy by controlled fusion of matter and newly obtained antimatter. Since the most well-known charged nucleon (of the matter) is the proton, we imagined another possibility to obtain a particle opposite to it, having the same main characteristics but the opposite charge, … …American Journal of Engineering and Applied Sciences, Vol. 13, Issue 3 · 11 Sep 2020 · 7,432 accessesView PDF Cite

Research ArticleOpen accessInteraction Between an Accelerated Electron and a Quark up to Transform the Quark up into a Down Quark, so that the Proton Practically Becomes a NeutronRelly Victoria Virgil Petrescu, Florian Ion Tiberiu PetrescuThe paper briefly examines the possibility of transforming a proton into a neutron, by introducing an accelerated electron inside the proton, in order to penetrate it into one of the two up quarks in order to transform it into a down quark, thus transforming the initial state of the proton into a new state of a neutron. Such an achievement … …American Journal of Engineering and Applied Sciences, Vol. 13, Issue 3 · 3 Sep 2020 · 7,853 accessesView PDF Cite