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Search Results: 1 - 10 of 153302 matches for " Apicella Antonio and Florian Ion T. Petrescu "
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A Dynamic Model for Gears
Aversa Raffaella, Relly Victoria V. Petrescu, Antonio Apicella and Florian Ion T. Petrescu
American Journal of Engineering and Applied Sciences , 2017, DOI: 10.3844/ajeassp.2017.484.490
Abstract: Nearly 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 contact (or more pairs of teeth in contact). It's not seen the physiology of the mechanism itself with toothed gears. In this study we do not only account for the impact of teeth (collisions between teeth) but we also consider all the principal dynamic events that are occurring in top gear plane. This article will present an original model that explores the dynamic events originated and taking place in the plane geared couple of the parallel axes geared transmissions. The first measure to be taken for the protection of the environment of pollution of the over a billion motor vehicles with heat engines already in circulation, is to improve the motors and their drives.
Transportation Engineering
Relly Victoria V. Petrescu, Raffaella Aversa, Antonio Apicella and Florian Ion T. Petrescu
American Journal of Engineering and Applied Sciences , 2017, DOI: 10.3844/ajeassp.2017.685.702
Abstract: The shipments were absolutely necessary at all times, but still have polluted and damaged the environment. The technique of transport or the engineering of transport is the application of the principles of technology and scientific findings to the planning, design check, operation and plan management for any mode of transport, in order to ensure that the conditions of safety, efficiency, quick, comfortable and convenient, economic and environmentally compatible movement of persons and goods (transport). It is a sub-discipline for civil engineering. The importance of the transport engineering in the framework of the profession of civil engineering can be evaluated by the number of divisions of the American Society of Civil Engineers (ASCE), which are directly related to the transport. There are six such divisions (Aerospace; Air Transport, motorways, pipes, watercourses, port, of coastal and ocean and urban transport), which represents one third of the total 18 technical divisions of the ASCE (1987). Humanity is struggling between technological tests of deployment of new types of mild transport for the environment and the need to maintain still in the operation the machines already polluting products in large quantity, cheaper, more convenient economically, that customers have already been accustomed. Transport is at the heart of major cross-cutting issues that are inseparable from issues related to the development and sustainable management of the mobility of goods and people. The automotive sector must meet several challenges to reduce the emission of particulate and gaseous pollutants while limiting the increase in the cost of vehicles. The development of "clean" or "sustainable" vehicles requires the integration of innovative technologies to meet all these requirements. Those all problems need to be addressed by the discipline named Transportation (Transport) Engineering, in view of the constantly improving the quality of transport carried out.
Physiologic Human Fluids and Swelling Behavior of Hydrophilic Biocompatible Hybrid Ceramo-Polymeric Materials
Aversa Raffaella, Relly Victoria V. Petrescu, Apicella Antonio and Florian Ion T. Petrescu
American Journal of Engineering and Applied Sciences , 2016, DOI: 10.3844/ajeassp.2016.962.972
Abstract: All synthetic and natural materials to be used in biomedical applications that involve the contact with human body need to be investigated for their physical and chemical modification induced by the human physiological fluids contact and sorption. The development and testing in human physiological equivalent fluids of new hybrid biomaterials are presented. The role of water and its equilibrium modification in the human physiology is discussed and the swelling and sorption behavior in the physiological environment of a nanostructured and osteoconductive biomaterials based on Poly-Hydroxyl-Ethyl-Meth Acrylate matrix (pHEMA) filled with fumed amorphous nanosilica particles is presented. This material differently swells in presence of aqueous physiological solution fluid. Biological hybrid scaffolds for bone regeneration and growth made using synthetic materials able to correctly interact with the physiological fluids while inducing the growth of biological tissues may favor the birth in the medical field of a new class of hybrid materials. Our multidisciplinary approach explores in the this paper, novel ideas in modeling, design and fabrication of new nanostructured scaffolding biomaterials with enhanced functionality and improved interaction with OB cells.
Mitochondria are Naturally Micro Robots - A review
Raffaella Aversa, Relly Victoria V. Petrescu, Antonio Apicella and Florian Ion T. Petrescu
American Journal of Engineering and Applied Sciences , 2016, DOI: 10.3844/ajeassp.2016.991.1002
Abstract: The mitochondrion is a natural robot (cell) with a length of about one micron. Between organisms (plant, animal or human) with its organs and the atomic and molecular components are positioned based cells, which are building all the necessary organs body. Years ago, medical specialists who are studying organ disease have considered that is caused by impaired organ or related to other organs. For example, it was considered that all nerve diseases have started from stress due to disorder of the hypothalamic-pituitary-adrenal (adrenal glands). Today one knows that psychological stress triggers some metabolic, inflammatory and transcriptional perturbations that ultimately dispose to malady in cellular energetics, involving mitochondrial energy production respiratory stress. Future research on mitochondrial can lead to the elucidation of great issues of life (including the generation of illness, aging and death bodies). The main idea of this paper is that mitochondria are independent cells, flexible, essential for complex life.
We are Addicted to Vitamins C and E-A Review
Raffaella Aversa, Relly Victoria V. Petrescu, Antonio Apicella and Florian Ion T. Petrescu
American Journal of Engineering and Applied Sciences , 2016, DOI: 10.3844/ajeassp.2016.1003.1018
Abstract: A Canadian researchers team led by dr. GC Willis, found that heart diseases are caused by hidden forms of scurvy and chronic and can be cured with high doses of vitamin C without heart surgery and drug treatments costly and with effects devastating side in organic plan. But the process of healing cardiovascular disease with vitamin C is not approved by the medical institutions and the pharmaceutical industry, which earns billions of dollars in surgeries and drugs that are used in allopathic therapies for various cardiac diseases. Canadian scientist discovery was confirmed in the late 80 s by Dr. Linus Pauling, Nobel laureate, the most noted human of his time. The medical care developed by Dr. Pauling include vitamin C with added lysine (amino acid nutritional qualities, existing in most plant and animal proteins) and it works cleanly, healing cardiopathy once thought were incurable. Dr. Pauling medical care records healing miracles coronary diseases. It had been identified back then that vitamin C deficiency within the body weakens human arteries by forming induration of the arteries plaques (infiltration of the walls of the artery and arteries with fat), that blocks blood circulation. This paper aims to spotlight the importance of vitamin C for the treatment and prevention of circulatory diseases especially. The daily minimum demand of vitamin C at tissues and cells level for a healthy person is: 75 mg/day women, 90 mg/day for men, 100 mg/day smokers. But always need a bigger tank because these amounts could reach all tissues and cells of a healthy organism: about 500-1000 mg/day. When the body is disturbed or ill, quantities required to repair cells, are much higher 5000-10000 mg/day.
Biomimetic and Evolutionary Design Driven Innovation in Sustainable Products Development
Raffaella Aversa, Relly Victoria V. Petrescu, Florian Ion T. Petrescu and Antonio Apicella
American Journal of Engineering and Applied Sciences , 2016, DOI: 10.3844/ajeassp.2016.1027.1036
Abstract: An innovative, design-driven, sustainable approach in conceiving, developing, producing, using new materials can be effective in strengthening the competiveness and success of creative industries linked to manufacturing (e.g., biomedical, architecture, automotive, art, crafts, supports for cultural items, decoration, fashion, furniture, lighting, interior design materials and products, jewels, luxury, media supports, publishing, sport and toys), adding value to products and processes also by 'immaterial' factors (e.g., trend translation, enhanced sensations, values). The vision that the research and the advancement of scientific and technological knowledge can be driven by the needs of sustainable development of products and goods has been revived as a strategy for sustainable development. In the evolutionary Design process, creativity determines the mutation of an object shape (material or structure morphology) and this triggers an evolutionary design that repeatedly involves technological development of material, shape and structure. A Biomedical product evolutionary design case study based on these principles has been specifically addressed to the dissemination and spreading of innovative material and technology greener solutions. The use of the evolutionary design in the creative medical industry sectors, while adopting sustainable and socially responsible approach to reduce energy consumption and environmental impact conveys a holistic view of the industrial design process in the field of biomedical application.
From Structural Colors to Super-Hydrophobicity and Achromatic Transparent Protective Coatings: Ion Plating Plasma Assisted TiO2 and SiO2 Nano-Film Deposition
Raffaella Aversa, Valeria Perrotta, Relly Victoria V. Petrescu, Misiano Carlo, Florian Ion T. Petrescu and Antonio Apicella
American Journal of Engineering and Applied Sciences , 2016, DOI: 10.3844/ajeassp.2016.1037.1045
Abstract: The implementation of the Ion Plating Plasma Assisted technology in the area of surface functionalization for structural color and relic preservation applications is presented. Interferometric structural colors on irregular bumped Titanium surfaces and transparent and achromatic nano films on ancient ceramic artifact have been investigated. Titanium metal and ceramic supports have been utilized for the surface functionalization tests: A metallic electron beam additive manufactured Titanium component and an ancient tile of the XIX century, which was characterized by strong chromatic valence and by a mixed porous and glazed surfaces, have been considered. A reactive magnetron sputtering Ion Plating Plasma Assisted apparatus operating in Argon or Oxygen atmospheres for TiO2 and SiO2 deposition has been utilized. Preliminary tests with two plasma treatments were carried out for optimal processing conditions definition. TiO2 nano-film deposition on irregular Ti surfaces has generated light direction depending color-changing surfaces while good achromatic and transparent coatings were obtained by using SiO2 coating. The high processing flexibility of the Ion plating technology is discussed. The SiO2 IPPA surfaces treatment resulted more convenient for restorative and preservation ancient historical tile was used to finally test the optimized process with Ion Beam Electron Microscopy, which was carried out on the tile porous structure, confirmed the high flexibility and efficiency of the innovative IPPA technology.
Future Medicine Services Robotics
Relly Victoria V. Petrescu, Raffaella Aversa, Antonio Apicella and Florian Ion T. Petrescu
American Journal of Engineering and Applied Sciences , 2016, DOI: 10.3844/ajeassp.2016.1062.1087
Abstract: It is an entry technique in use recently, albeit in selected centers and represents a further step in the field of minimally invasive surgery. Basically it has the same indications but, at present, is reserved for selected patients. Compared to traditional video-assisted surgery presents some important differences. The surgeon is physically distant from the operative field and sits at a console, equipped with a monitor, from which, through a complex system, controls the movement of the robotic arms. These are fixed the various surgical instruments, tweezers, scissors, dissectors, that team shall present to the operating table to introduce into the cavity operative site. The use of mechanical arms has the advantage of allowing a three dimensional view an image with more stops and to make the most delicate maneuvers purposes and also because the tools are articulated to the distal end. The disadvantage is related to the times longer operative and the difficulty of determining the strength (as can happen in giving the right tension to a surgeon's knot). In the future it can be assumed that robotic surgery will allow, with the development of the experience, the spread of the equipment and improvement of telecommunication systems and data, to operate at ever greater distances. If you think that today, the space centers, you can operate the robots sent to the moon or farther away, it is not hard to believe that it will become usual to operate from side to side of the area, providing you with all the best and specific skills. The first surgical robot called da Vinci, in honor of Leonardo da Vinci, was developed in Silicon Valley by Intuitive Surgical and in 2000 he obtained the authorization of the American Food and Drug Administration (FDA) for use in laparoscopic surgery. The present paper wishes to show briefly several models of the main robots placed in the service of human medicine.
Hybrid Ceramo-Polymeric Nanocomposite for Biomimetic Scaffolds Design and Preparation
Raffaella Aversa, Relly Victoria V. Petrescu, Roberto Sorrentino, Florian Ion T. Petrescu and Antonio Apicella
American Journal of Engineering and Applied Sciences , 2016, DOI: 10.3844/ajeassp.2016.1096.1105
Abstract: Biomimetics, biomechanics and tissue engineering are three multidisciplinary fields that have been contemplated in this research to attain the objective of improving prosthetic implants reliability. Since testing and mathematical methods are closely interlaced, a promising approach seemed to be the combination of in vitro and in vivo experiments with computer simulations (in silico). An innovative biomimetics and biomechanics approach and new synthetic structure providing a microenvironment, which is mechanically coherent and nutrient conducive for tissue osteoblast cell cultures used in regenerative medicine, are presented. The novel hybrid ceramo-polymeric nanocomposites are mutually investigated by Finite Element Analysis (FEA) biomimetic modelling, anatomic reconstruction, quantitative-computed-tomography characterization, computer design of tissue scaffold. The starting base materials are a class of innovative highly bioactive hybrid ceramo-polymeric materials set-up by the proponent research group that will be used as bioactive matrix for the preparation of in situ bio-mineralised tecto-structured porous nanocomposites. This study treats biomimetics, biomechanics and tissue engineering as strongly correlated multidisciplinary fields combined to design bone tissue scaffolds. The growth, maintenance and ossification of bone are fundamental and are regulated by the mechanical cues that are imposed by physical activities: This biomimetical/biomechanical approach will be pursued in designing the experimental procedures for in vitro scaffold mineralization and ossification. Bio-tissue mathematical modelling serves as a central repository to interface design, simulation and tissue fabrication. Finite element computer analyses will be used to study the role of local tissue mechanics on endochondral ossification patterns, skeletal morphology and mandible thickness distributions using single and multi-phase continuum material representations of clinical cases of patients implanted with the traditional protocols. New protocols will be hypothesises for the use of the new biologically tecto-structured hybrid materials.
One Can Slow Down the Aging through Antioxidants
Raffaella Aversa, Relly Victoria V. Petrescu, Antonio Apicella and Florian Ion T. Petrescu
American Journal of Engineering and Applied Sciences , 2016, DOI: 10.3844/ajeassp.2016.1112.1126
Abstract: Free radicals are natural nanoparticles which are doing their part well defined in the human cell, but then they must be annihilated or eliminated to not destroy the cell or another part of our body. It has been shown that residual free radicals in the body are responsible for the aging. The role to annihilate them is ful-filled by the antioxidants. Antioxidants are a group of compounds produced by the organism or that occur naturally in many foods. Antioxidants work together in the human body to maintain health and vigor, especially during the last decades of life. They do this by protecting us from harm caused by free radicals that can destroy skin and tissues healthy cells of the organism. Antioxidants are chemical compounds with many and varied applications. Naturally present in our diet, through fruits, vegetables, tea or red wine, they are recognized to be good for health. In fact, antioxidants protect our body's proteins and nucleic acids from oxidation. In the industry, antioxidants are also used as food additives to increase the shelf life of food. They are also present in the packaging or the wheels of cars because they prevent synthetic materials from becoming crumbly and brittle. Finally, in the cosmetics industry, creams containing antioxidants are known for their anti-aging properties. An antioxidant is a molecule that decreases or prevents the oxidation of other chemicals. Oxidation is part of an oxidation-reduction reaction that transfers electrons from a substance to an oxidizing agent. This reaction can produce radicals that cause destructive chain reactions. However, whatever the field of application, the unstable nature of antioxidants is a problem: The molecules degrade rapidly and have a particularly limited power of action over time.
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