Author

Florian Ion Tiberiu Petrescu

Theory of Mechanisms and Robots, Bucharest Polytechnic University, Romania

151 articles in our journals

Articles where this person is an author, newest first. People are matched by their name as printed (no ORCID iD is recorded for them), not by name alone; search the name as text to find namesakes too.

Research ArticleOpen accessWhat is a UFO?Relly Victoria Petrescu, Raffaella Aversa, Bilal Akash et al.There is much talk about UFOs sometimes. Is there anyway? If so what are they? Here are some questions we want to answer them briefly in this paper. An unidentified flying object or UFO is defined as any apparent object in the sky that can’t be identified and classified as an object or phenomenon already known. But the name is … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 2 · 25 Jun 2017 · 17,960 accessesView PDF Cite

Research ArticleOpen accessOur UniverseRelly Victoria Petrescu, Raffaella Aversa, Bilal Akash et al.It's hard to know ourselves and our role as humanity, without knowing our precise location first. In the universe where we find ourselves (what we know not much about), there are billions of galaxies. A galaxy is a large cluster of stars (suns), i.e., solar systems; on average an ordinary galaxy contains about two billion stars (suns), which may or … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 2 · 21 Jun 2017 · 7,343 accessesView PDF Cite

Research ArticleOpen accessUnder WaterRaffaella Aversa, Relly Victoria Petrescu, Antonio Apicella, Florian Ion Tiberiu PetrescuWith a 361 million square Km surface and a volume of 1370 million of cubic kilo, world seas and oceans have represented and still remain the privileged space for living species evolution. Other than being the 70% of the Earth surface, water environment, contrary to the terrestrial one where life essentially develops in 2 dimensions, is a 3D fully volume … …OnLine Journal of Biological Sciences, Vol. 17, Issue 2 · 10 Jun 2017 · 7,231 accessesView PDF Cite

Research ArticleOpen accessElectron DimensionsRelly Victoria Virgil Petrescu, Raffaella Aversa, Shuhui Li et al.In this study, the theoretical principles necessary to determine the exact magnitude of a moving electron, depending on the speed of movement, will be exposed. The equations are specifically discussed to determine the radius R of the moving electron, which refers to the electron movement velocity v and the resting mass m0. The mechanical moment of inertia of a sphere … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 2 · 5 Jun 2017 · 7,576 accessesView PDF Cite

Research ArticleOpen accessTesting by Non-Destructive ControlRelly Victoria Virgil Petrescu, Raffaella Aversa, Bilal Akash et al.This paper describes an application of industrial robots that gain ground mainly in the aerospace industry. It is a TTT manipulator whose task is to automatically position the end-effector, in this case a complex sensor system and a eddy-current probe in the position set by the software application for testing by non-destructive ultrasound control of tickets and bars of titanium, … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 2 · 5 Jun 2017 · 8,698 accessesView PDF Cite

Research ArticleOpen accessDynamics of Mechanisms with Cams Illustrated in the Classical DistributionRelly Victoria Virgil Petrescu, Raffaella Aversa, Bilal Akash et al.The paper presents an original method to determine the general dynamics of rotating cam and lifting, customized to flat-plate mechanism. First, the dynamic cinematic is presented. Then the Lagrange equation is resolved and with an original dynamic model with a degree of freedom with variable internal damping the dynamic analysis of two models is then made. The mechanisms presented, scientifically … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 2 · 5 Jun 2017 · 8,491 accessesView PDF Cite

Review ArticleOpen accessLockheed Martin-A Short ReviewRelly Victoria Petrescu, Raffaella Aversa, Bilal Akash et al.Lockheed Martin is a company aerospace global American, defense, security and advanced technologies with interests in the world. Has been formed by the merger of Lockheed with Martin Marietta in March 1995. Has its head office in Bethesda, Maryland, in the area of Washington DC. Lockheed Martin has 126,000 employees in the entire world. Marillyn Hewson is the current President … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 1 · 30 May 2017 · 10,229 accessesView PDF Cite

Review ArticleOpen accessHistory of Aviation-A Short ReviewRelly Victoria Virgil Petrescu, Raffaella Aversa, Bilal Akash et al.The man has always wanted to be able to fly. The dream or although it has achieved, has not been reached yet fully. The fuse of the flight today is much higher than in the past, but is not yet complete. Although they have carried out the steps in the increase of the safety of a ship in flight, there … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 1 · 22 May 2017 · 16,578 accessesView PDF Cite

Research ArticleOpen accessModern Propulsions for Aerospace-Part IIRelly Victoria Virgil Petrescu, Raffaella Aversa, Bilal Akash et al.Speaking about a new engine ionic means to speak about a new aircraft. The paper presents in a short time the actual engines ion chambers (called the ion thrusters) and other new ionic motors proposed by the authors. The engine (ionic propulsion unit of ions, that accelerates the positive ions through a potential difference) is approximately ten times more efficient … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 1 · 25 Apr 2017 · 8,118 accessesView PDF Cite

Review ArticleOpen accessModern Propulsions for Aerospace-A ReviewRelly Victoria Petrescu, Raffaella Aversa, Bilal Akash et al.A spacecraft propulsion is any method used to accelerate spacecraft and artificial satellites. There are several different methods, each with advantages and disadvantages, spacecraft propulsion being an active area of research. However, most current spacecraft are propelled by forcing a gas exits through the rear of the vehicle at high speed through supersonic nozzle of a rocket engine. All spacecraft … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 1 · 25 Apr 2017 · 12,881 accessesView PDF Cite