Journal of Research and Innovation for Sustainable Society

15-22

Authors: M Bucur, S Cananau

One of the most important application in mechanical transmissions with gears is the transmission by bevel gears. In this paper we are going to perform a computerized design of the bevel straight gears transmission and the static analysis of the bevel gers transmission under load. We presume that these gears are manufactured in conical blanks by cutting, using same known methods. The static analysis is performed using the Finite Element Method. We present the results of the comportment of the system under load for displacements and stress in the region of the root of the teeth, the total displacement due to elastic deformation of the structure and the results in conditions of Hertzian contact under load.

31-35

Authors: C Isac

A actualy distribution system in electronic commerce is the e-Fulfillment. In the first part of the paper by presenting the concept and technological developments we have highlighted several classifications thereof. The biggest part presents the main operations are conducted at the operator e-Fulfillment, from taking products from suppliers, management, logistics, comparative analysis of classical storage and eFulfillment systems, some aspects of the advantages of using these systems, the costs involved and examples for Romania. The paper ends with some aspects of the consequences of the electronic trading and eFulfillment services development on human resources.

44-51

Authors: D Cîrţînă, A Tudorache

The paper presents the way of obtaining lime, the technological processes adopted and the resulting products. The process of obtaining lime has effects on the environment, affecting through the emissions of pollutants, as well as the quality of air, water and soil. That is why this process of obtaining lime must comply with the regulations in force to ensure a balance between the industrial environment and the environment. At the same time, it is important to know the sources of pollution, but also the measures for the protection of the quality of the environmental factors, so as to ensure a control of the emissions resulting from the lime industry and a low level of pollution, without significant effects on the environment.

60-69

Authors: I Radulescu, A V Radulescu, M M Nicolescu

The paper presents the conditions, objectives and stages necessary to implement an ISO 14001Environmental Management System in a company for computers and electronic devices repairing. Implementing ISO 14001 standard establishes a set of rules for a high performance Environmental Management System. The company works in computers and electronic devices repairing and its purpose is to improve the organization environmental performance by using efficiently the resources. The applied system concern environmental activities and aspects that the organization can control and influence, including the requirements imposed to be fulfilled. The company environment policy had to formulate environmental objectives, according to the legislation. The environmental results are obtained in accordance with the quality, health and occupational safety policy and with the strategic direction of the organization.

78-85

Authors: C Torcătoru, D Săvescu

Among the current challenges of the global automotive industry include changes in global markets that lead to a variety of products, regulation that drives pressure on new technologies, and competition from new competitors. This paper attempts to find answers to the question, how can we capitalize the semi-finished parts of the automotive industry that have emerged from the parameters demanded/imposed by the final customer or which have some visual / design defects, but which retain their functional role. In almost all cases, information and communication technology plays a major role in future strategies to meet the challenges mentioned above, which can stimulate the production process more efficient by using intelligent manufacturing approaches. Thus, this paper proposes to automate and maximize the capitalization of these parts, a Paternoster system for eliminating the logistics/storage space, reducing the handling time, increasing the efficiency and traceability of the scrap

92-100

Authors: L Paunescu

In the analysis we made turned its attention to finding a correlation between GDP and the rate of insertion of university graduates in the economic, regional levels. Analysis shows that there is a correlation between the degree of employability of university graduates and the regional gross domestic product. We hope that this study will be a significant contribution from the regional perspective to better knowledge of the complex relationship between education and employment, may serve to define the strategic role of training and grounding and directing future regional policies on employment and training.

107-115

Authors: I L Petre, M Nica, C Caraman

This article proposes the research of the consumption expenditures in Romania in relation to the income. Thus, with the help of the data provided by the national bases, respectively the National Institute of Statistics on the evolution of the total consumption expenses, of the food expenses and the evolution of the incomes, it was possible to determine the influence that they have on the consumption, respectively the expenses. By making two simple linear regression models it was possible to determine the equation of the function in which both total consumption expenditure and consumption food expenditure could be expressed according to the level of income.

121-124

Authors: R Mecu, D Cîrţînă, V Nănescu

The aim of the current study is to prevent and reduce the number of bacterial infections in surgical implantation procedures. The hydroxyapatite is a calcium phosphate ceramic with important applications in the medicine and chemistry fields. The hydroxyapatite is a main mineral constituent of the hard tissues such as bones and teeth. The hydroxyapatite has remarkable properties including biocompatibility, bioactivity and ability to form a direct chemical bond with human hard tissues. Over the last decades, the biomedical orthopaedic and dentistry sectors have witnessed an unprecedented demand for a large variety and number of scaffolds, grafts, implants, and endo-prostheses. The increase in life expectancy, and the higher frequency of injuries and diseases are regarded as the main factors for this growing demand in orthopaedic and dental devices. The quality of life for millions of people has been drastically improved by using hydroxyapatite for bone repair and tissue regeneration. Recent findings in the realm of ion-substituted hydroxyapatite (HA) could pave the road towards significant developments in biomedicine, with an emphasis on a new generation of orthopaedic and dentistry applications, since such bioceramics are able to mimic the structural, compositional and mechanical properties of the bone mineral phase.

13-20

Authors: O D Negoita, OR Chivu, C Babiş, A Dimitrescu, L Dascalu, E Niculae, G Iacobescu, A Semenescu, A Purcarea

A drive from a diesel engine of a truck was broken into four parts during normal use.Damaged bolt caused longitudinal and transverse cracks. They started from the surface of the hole and stretched outward. The appearance of marginal signs and striations on the surfaces of all regions of origin of the crack indicate that fatigue breakage is the dominant damaging mechanism of the bolt. The surface of the hole and the outer surface are indicated to be cemented. Microstructure and microstructure profiles at the bolt surface and in the regions of the hole surface were examined to determine the thickness of the cecmentitious layer. However, not only there was no cementitious layer found on the surface of the hole, but also a serious decarburization occurred in the area. The appearance of decaying the surface of the hole greatly decreases the fatigue strength of this area, so the crack has started from the surface of the hole and stretched to the outer circle, eventually opening the tear. Inappropriate cementing technology is responsible for decarburation of the surface of the hole.

29-34

Authors: A Dimitrescu, C Babiş, E Niculae, O Chivu, L Dascălu

This paper aims to present the study on the implementation of the Kanban system for the "bicycle wheel" benchmark in demand-side conditions. Due to variations in customer orders, production on the "Wheels" line is inconsistent, with work volume being also variable. In this way, dead times appear, production stagnating at some times, and in others being overstretched. There is a problem of finding a method of leveling the production, which also leads to a better performance of the Logistics department within the "Expedition" service. The work was carried out following a study with data provided by SC MECHROM INDUSTRY SRL, a member of the CAMPAGNOLO group, a bicycle manufacturing company, exclusively for performance sports.

39-54

Authors: L M Cîrțînă, D Cîrțînă , S S Ghimiși, A Foanene

The present study make an analysis of the energy sector and energy market in Romania and Europe. The energy strategy project 2016-2020 by 2030 is currently under development and then approved by the Romanian government. This perspective on the development of electricity production in Romania was elaborated on the basis of the assessment of the macroeconomic, industrial and employment impact on energy scenarios. Also others country from Europe have to fallow the energy strategy project for the next years. We can see that the old energy technology needs to be adapted to new environmental requirements and increasingly developed new technologies for obtaining energy from renewable sources which implies the development of a sustainable energy mix adapted to the new environmental and economic requirements.Countries like Germany, France, UK, Poland, Netherlands have already abandoned much the old polluting energy technologies and developed renewable energy, they are also advantaged by a sustainable economic development compared to the low economically developed countries like Romania, Bulgaria and others. Clean energy is at the heart of world's aspirations for a better future, as reflected in the 197 countries that have signed up to the Paris Agreement on Climate Change. The transition from fossil fuels to renewable sources such as solar and wind is key to achieving social, economic and environmental development. This will change the lives of 1,2 billion people who struggle through life with no electricity, will create new jobs and commercial opportunities and it will slash the air pollution that claims millions of lives each year. All this defines the sustainability of the energy mix.

59-66

Authors: C Babiş, O R Chivu, A Dimitrescu, L Dascalu, E Niculae, G Iacobescu, A Semenescu, O D Negoita, A Purcarea

In general, the body of the ship is a welded metal structure made up of the shell and bone. The paper aims is to analyze and present the solution for the collision damage to a river transport vessel. The problem is treated as in the case of a typical failure of welded constructions. In this regard, the fault will be described, after which the stages of the fault remedy will be presented.

73-80

Authors: L C Dascalu, O Chivu, C Babiş, A Dimitrescu, E Niculae:

The study is a novelty because was elaborated on a group of students in the academic environment in France. Following the documented steps, I have noticed that several questionnaires have been used in order to identify stress levels in the academic environment. The case study presented in this article consists in a questionnaire meant to identify stress factors. There are several factors that are likely to cause stress: changes to routine, time pressure, difficult tasks, too much homework’s, financial state, sleep schedule and physical work conditions. I believe that stress management results could be visible if we can motivate people to adjust their behavior and life style.

87-90

Authors: E Niculae, A Dimitrescu, C Babiş, O Chivu, L Dascălu

The planar mechanisms with articulated bars and gears (which we will simply note MeBaRd) are part of the general planar mechanics category. Although structural structural studies have been carried out [7], the structural synthesis of bars and wheels can be approached as a distinct problem. Some papers refer directly to a certain class of mechanisms, such as planetary mechanisms [1], [2], others stop on subsystems with zero mobility, called structural groups with toothed elements [6], [8]. In this paper, developing some ideas presented in [3], [5], a general algorithm for unitary structural synthesis of MeBaRd was developed and developed, having the input parameters: M - the degree of mobility and N - the number of contours

97-112

Authors: E A Patroi, A Bordianu, G Samoilescu

The paper presents ways to produce magnetic nanoparticles to be incorporated into magneto-bioelectronic devices where chemical processing must control composition, microstructure, phase purity, particle morphology, and control size particle, thereby reducing particle aggregation and size distribution. The methods of synthesis of magnetic nanoparticles are analyzed: physical vapor deposition, mechanical and chemical synthesis in the solution. Solution synthesis offers advantages: easy control of the size and composition of the particles, possibilities to change the surface in order to obtain a stable dispersion in different solid or liquid media. The properties of nanoscale powders, nanostructured materials and nanoparticles in solution are strongly dependent on particle size, and their dispersion state. Laboratory syntheses have been performed by analyzing the methods of synthesis of nanometric magnetic particles.

123-130

Authors: R M Gogonea

Linking economic research to the sustainability process also includes the need to study water footprint issues of consumption of industrial products. In this context, the water footprint of the consumption of industrial products from the point of view of the territorial concentration in European countries is analyzed. At the same time, this type of water is approached on the two categories of components: blue and gray, taking into account the volume of water resources used internally and externally for the production of goods and services consumed by the population. Also, the degree of concentration of water footprint of the consumption of industrial products was determined in the paper. Thus, two of the most significant indicators (Gini Coefficient and Shannon Entropy) were used and relevant concentration curves were constructed. The results highlighted for both categories, blue and gray, a high degree of internal concentration and reduced external focus. Taking into account the results the future orientation is to develop and implement environmental strategies that will reduce the water footprint of the consumption of industrial products, especially for the internal category.