bluuebunny/crossref_metadata_2025_split huggingface dataset:
SEM, EDS and XPS studies of AC & DC PEO coatings obtained on titanium substrate
Authors: Rokosz K , Hryniewicz T , Dudek Ł , Pietrzak K , Raaen S , Malorny W , Ciuperca R 
Published: October 2019

Abstract
The porous coatings may be fabricated on titanium substrate by Plasma Electrolytic Oxidation (PEO), known also as Micro Arc Oxidation (MAO), under AC or DC regimes. The obtained surfaces were characterized by Scanning Electron Microscope (SEM), Energy-dispersive X-ray spectroscopy (EDS), and X-ray Photoelectron Spectroscopy (XPS). This work has discussed the influence of electrolyte composition and of PEO type (AC-PEO or DC-PEO) on chemical composition of fabricated porous coatings as well as on their surface stereometry. The recorded results show clearly that the external porosity and roughness of obtained surfaces as well as metal-to-phosphorus ratios are different for different solutions and PEO processes, but for all PEO surfaces the bindings energies of titanium (Ti 2p), oxygen (O 1s), phosphorus (P 2p) may suggest that all the top nano-layers consist of Ti4+ and groups PO4
3–, and/or HPO4
2–, and/or H2PO4
–, and/or P2O7
2–.
Comparative analysis of the morphology of doped zinc and copper oxide nanopowders
Authors: Modan E M , Ducu C M , Moga S G , Negrea A D , Plăiaşu A G 
Published: October 2019

Abstract
Nano-oxides attracted the attention of the reserchers due to their numerous applications. From this point of view, the development of new synthesis methods has become equally important for industry. The use of solar energy can become one of the ecological methods of obtaining nano-powders. Our paper presents the comparison of the morphology of nanopowders of Al-doped zinc oxide and Mn-doped copper oxide, obtained by physical vapour deposition using solar energy (SPVD), at different pressure and solar flux. The morphological characterization of doped oxide nanopowders synthesized by SPVD was performed by scanning electron microscopy.
Analysis and impact of different ambiguities in industrial technical product drawings
Authors: Oezden R , Popa M S , Danho S 
Published: October 2019

Abstract
The declaration of conformity of a workpiece to the technical product drawing is absolutely essential in modern industrial product development. Today, the dimensioning of the technical product drawing features many ambiguities, which are indicated unconsciously by the construction and development departments. Not least, the reason for this can be found within the steady changes of the international standards, which are controlled by the system of Geometrical Product Specification (GPS). As soon as the planning, concept and development stage within classical industries is largely completed and a no longer modifiable drawing status has been attained, suitable tools have to be built on the basis of the technical product drawing in order to start production. Once the tools are available, the results of the pilot series can be assessed via initial sample analysis. During this stage, the assessment via measurement technology equipment ensues in order to ascertain the requirements of the technical product drawing. The assessment of the negative measurement values ensues within the project team, which is difficult since it can yield many divergent assertions. This paper analytically shows the impact of ambiguities resulting from technical product drawings and contributes to the solution of a precise geometrical quality assurance through its clarity.
Path planning optimization for mechatronic systems with the use of genetic algorithm and ant colony
Authors: Tsagaris A , Mansour G 
Published: October 2019

Abstract
Path planning optimization of mechatronic systems is a very important field of research that has been growing rapidly in recent years. Coordinate measuring machines (CMM), robotic arms, CNC machines, are often using a big amount of points to control the path planning. Within these efforts, some encouraging results are presented in this work on the optimization of path planning. By integrating ant colony techniques into genetic algorithm, path optimization can be reached up to 50% instead of the simple genetic algorithm. At the same time, the calculation of the optimal solution that makes this technique even more efficient is accelerated. From measurements made in a simulation model, reductions in overall trajectories were recorded up to 40% in cases where the number of points exceeded 500 while the optimal path planning time was reduced by up to 20%. In real-system implementation these values are slightly reduced due to the real-time execution of the movements. This integration makes the proposed technique particularly attractive in cases where are path planning between a large number of points and the calculation time is required to be small.
Analysis of shape deviations of technical polyamide workpieces in different defined time intervals
Authors: Aclan M , Popa M S , Oezden R 
Published: October 2019

Abstract
Engineering grade plastics gain importance across the industry and have become indispensable today. Machine operators must concern themselves among others with environmental and manufacturing influences that can affect the geometrical properties of plastic articles daily. In practice, these are declared as check gauges in the inspection drawing and are checked in accordance with quality standards. Based on experience, plastic articles made from polyamide start to grow after a certain time span. Even manufacturers of plastic granulate indicate this in their fact sheets. Here, the geometry of the plastic articles themselves plays a crucial role, especially in how far it can be altered. Additionally, in globally aligned companies with several production facilities, certain ecological influences such as temperature and humidity are different. The effect this has on plastic articles in terms of growth has been investigated in a different research paper [1]. This paper is primarily concerned with the evaluation of geometrical alteration by means of warpage formation. Thereby, an experimental part is demonstrated and constituted in comparison with two different climate simulations, of standard climate and one of extreme climate, over the course of a defined period of two months.
A comparative study about some application packages used in Photogrammetry
Authors: Nedelcu D , Gillich G-R , Malin-Tatian C 
Published: October 2019

Abstract
Photogrammetry is the technique used to convert a real geometry of a part into a 3D computer file starting from images. The paper aims to compare some free and commercial application packages used in Photogrammetry, based on the same images taken from an axial turbine blade. The blade geometry can be included in a bounding box with the following dimensions: 233 x 125 x 82 mm. The geometrical entities generated with these applications will be compared through Cloud Compare software.
Determination of the shape of a beam obtained by fused deposition material with general loads
Authors: Stănescu N D , Beșliu–Gherghescu M L , Rizea A 
Published: October 2019

Abstract
In this paper, we develop a general procedure for the obtaining of the shape of a beam obtained by FDM and having arbitrary loads. The beam is subjected to bending loads and because of its small elasticity modulus the approximate theory presented in the strength of materials cannot be applied. We used the general equation for the deformation of the beam resulting non-linear equations for the bending moment, the shear force, the rotation, the elongation and the deflection. These relations are solved by numerical methods. An example will highlight the theory.
State machines simulator for distributed decision system
Authors: Savu T , Jugravu B A 
Published: October 2019

Abstract
The amount of computing power assigned to the intelligent components of a production system must be justified by the benefits brought following the decisions these components are taking. The paper proposes a state machines and messages exchange based model for developing simulators used to estimate the system’s behavior and performance in different configurations. A simple system was modeled and simulations were performed for different numbers of electric transporters in the system, different charging times and for different degrees of independence concerning the decisions taken by the manufactured products. It was possible to determine the most effective number of transporters, a value which is increasing, as expected, with the charging time. A second conclusion was that allowing the manufactured products to decide themselves concerning the transporter to use at a certain moment does not necessarily increase the overall system’s performance.
Particular features of the load-bearing elements of rigging lifting systems
Authors: Verschinskiy A , Gorokhov P , Shubin A 
Published: October 2019

Abstract
The problems of deformability of a large-capacity metal support beam are considered. The results of experimental studies and numerical analysis of beam deformability are presented. These studies take into account the specific interaction of stresses arising from the impact of loads on the product at operation, and residual welding stresses. Recommendations on stabilization of form deflections of metal construction of beams are given.
Modelling and improvement of the design of hinged centralizer for casing
Authors: Shatskyi I , Vytvytskyi I , Senyushkovych M , Velychkovych A 
Published: October 2019

Abstract
We have researched an important problem for the oil-and-gas field, which is the problem of centralizing of cases in wellbores with a complex profile. Usually this problem is solved by equipping the case in problematic areas with special centralizing devices. Centralizers have mutually competing requirements: low stiffness in order not to slow down the descent of the case into wellbore and high stiffness in order to provide proper clearance gap for high-quality cementing of the annular space. The aim of the paper is to solve this problem by means of the construction of a hinged-rod centralizer, additionally equipped with a thrust ring. To model the arch-shaped link of the centralizer, the classical theory of the flat rods is used. On the basis of analytical solution of contact problems with unilateral connections, we investigated the stress-strain state of the rod in two cases: before and after the interaction with the axial obstruction. We have determined the non-linear dependencies between the contact force and the mutual approach of the case and the wall of the wellbore, and also the expressions of the acceptable contact loadings that provide structural integrity of the construction.
Analysis of the influence of the aspect ratio on the vertical axis wind rotor performance
Authors: Rabei I , Guțu M 
Published: October 2019

Abstract
The aspect ratio (AR) of the vertical axis wind rotors defined in this paper as the ratio between the height and the diameter of the rotor is an important factor when considering the performance of the rotors. However, choosing the most appropriate AR when designing a wind rotor, based on literature review, is not fully reliable as different sources point out contradictory data. This paper presents an analysis regarding the influence of the AR on rotors performance based on experimental data.
Adaptive drive and adaptive mechanisms of technological machines
Authors: Lemeshko M A , Kozhemiachenko A V , Iliev A G 
Published: October 2019

Abstract
Examples of the development and application of mechanisms and machines endowed with the properties of self-adjustment (adaptation) to changing operating conditions, in particular machines for mining operations, are presented. It is shown that adaptive mechanisms and machines have a number of advantages in variable operating conditions. At the same time, the area of knowledge on the creation and use of adaptive machines and mechanisms to date, remains poorly understood. The purpose of the work is to present the concept of adaptation of mechanisms and machines to operating conditions, the Executive bodies of which work with variable loads. The results of the paper can be useful for machines and mechanisms design with self-adjusting and self-regulating characteristics. Adaptive mining tunneling, drilling machines and adaptive cutting tools reveal the concept of adaptive machines and mechanisms characteristics to changing operating conditions. The principle of operation of an adaptive drilling machine designed for drilling operations is described. It is shown that the feedback between the torque of the resistance to rotation on the drill rod and the force of the rod feeding on the face is carried out through the force-torque connections with the optional use of electronic automation tools.
Study to increase the quality of the scientific research process
Authors: Ghimisi S S , Nicula D 
Published: October 2019

Abstract
At present, increasing attention is paid to the quality of products and processes in different fields of activity. Currently, universities and other institutions with research activities scientifically, are increasingly concerned with the implementation of quality management through different one’s methods and tools. Quality Management provides a range of tools that can be used to find solutions when it comes to improving quality. In this paper the authors present a study on the tree diagram determination, for quality improvement the scientific research process. The important measures to be taken have been identified for the successful completion of a scientific research process. To increase the quality of the scientific research process, has grouped the identified measures and thus leads to an orientation to three specific objectives: the organization’s management adequately assures the necessary resources; the head of the research collective adequately organizes the research activity; the research collective chooses and applies an adequate research methodology on the theme. A measure from the third specific objective is considered to be a secondary objective, and for it specific actions are provided which constitute level 4 of the tree diagram. A diagram has been developed that includes: the general objective, the specific objectives, the measures identified for the achievement of the objects. The paper presents a tree diagram that can be used in the quality management within the frame of the organizations which desire to improve the quality of the scientific research activities. The use of this diagram offers the advantage to examine in a chronological and logical sense the causes which determine the quality of a scientific research process
A neural network application for the estimation of the probability of leaving a working place
Authors: Ene A , Stirbu C 
Published: October 2019

Abstract
This article is about a topical theme, namely that of leaving a workplace, by an employee. The paper proposes that on the basis of input data, to make an estimate of the probability of leaving a job by a particular employee. In order to make such a prediction, the authors of the paper propose the use of artificial intelligence elements, namely artificial neural networks. Artificial neural networks have the ability to generalize, based on a history. The probability of abandonment of a job, is determined empirically, because there is not an exact mathematical formula. When we do not know the equation after which a particular process takes place, to make an estimation, neural networks are excellent tools.
Use of structural design and analysis software for master degree education in mechanical engineering fields
Authors: Debeleac C 
Published: October 2019

Abstract
In this paper the author deals a presentation of modern teaching methods applied in higher education process (master degree) at Dunarea de Jos University of Galati, Engineering and Agronomy Faculty of Braila. This paper describes main courses that are laid out in order to achieve the desired goals and haw the virtual laboratory experiments should fit into the courses to promote interdisciplinary understanding. A practical example of master degree studies will be provided as a case of good practices in supporting of National education process to become harmonized with European Area of Higher Education.
Development of the production system through lean management tools
Authors: Plakhin A E , Al-Ogaili S M M , Semenet I I , Kochergina T V , Mihajlovskij P V 
Published: October 2019

Abstract
Lean management or lean manufacturing is a fairly new practice for Russian enterprises. The introduction of lean management systems into Russian realities began in the 2000s. The main problem is that domestic enterprises, starting from the state of the economy and mentality, cannot use foreign experience without changes. In this paper, the main tools of lean manufacturing are considered and a step-by-step method of system implementation is proposed using the example of Uralelectromed JSC. Currently, only large Russian enterprises have the practice of introducing lean production systems. In this paper, we consider the method of implementing the system on the example of a small group of employees of the enterprise. This technique can be successfully applied to small enterprises. The aim of this work was to develop a concept for the development of the production system through lean management tools.
A graphical software application for the ergonomic design of a working place
Authors: Ene A 
Published: October 2019

Abstract
A working place has to be designed in order to offer with minimum cost adequate working conditions. The labor yield is much influenced by environmental measurable parameters like temperature, humidity, noise and the luminosity at the working place. In this paper we present a graphical application that could be used to investigate which is the best combination for the values of these input parameters from the point of view of work efficiency. The relationship between the input parameters and the work efficiency is nonlinear. Therefore, we used a neural network to model these nonlinearities. The neural network is simulated using Java programming language.
Costs calculation of an work accident in a production hall for metallic confections
Authors: Cojocaru D , Solomon Ghe , Dijmărescu M C 
Published: October 2019

Abstract
Work accidents and occupational illnesses are subjected to a strict and distinct part of the legislation regarding health and safety at work. Each year, in the all world, a significant number of workers get ill, are injured or lose their lives at work. From this situation results, first of all, the generation of human costs, and second, a number of financial costs. Therefore, the total cost of work accidents and occupational illnesses includes both financial costs and an assessment of the human costs which will be borne by economic organizations and businesses. Work accidents, generated and quantified in Romania, lead to economic losses that are not negligible. Therefore an expert procedure needs to be adopted to determine their cost and consequently to determine the impact they have on the enterprise or organization. This paper presents a cost calculation model, using the method PREVENT-MATRIX, in the case of a work accident in a production hall for metallic confections.
The development of a methodology of learning to use simulation in the analysis of production system performances
Authors: Gavriluță A , Gavriluță C A , Pascu I , Neacșu C 
Published: October 2019

Abstract
Considering the dynamic environment in which the present companies work, global market, fierce competition, frequent changes of techniques and technologies, more diverse demand from clients, changing norms and ethics, it is a pressure that rises. To cope with these complex factors, the modelling and simulation of production systems became a main approach in the middle of 20th century. To develop a model and to later use it in simulation is an “artistic” balancing of opposites that demand finesse and skills; on one side the model must be easy to use, that meaning it must involve a level of abstraction from reality, on the other side the model must be a faithful representation of the system it mimics. Therefore, in this article we will develop a learning platform for a methodology to use the modelling and simulation in the analysis of production systems performances. The platform and the methodology will be later experimented and validated, leading to a higher level of research quality.
Experimentation of a methodology to use modelling and simulation in the analysis of performances of an automotive industry production system
Authors: Gavriluță A , Gavriluță C A , Neacșu C , Pascu I 
Published: October 2019

Abstract
The simulation is almost always used as an integrated part of a system design process, as method to identify the improvements of an existing process, to evaluate an already developed model to find alternative solution for it or to compare working hypothesis. It represents an experimental technique that allows experimentation on models of the real system created using a specific simulation language. The knowledge accumulated during the experimentation on the model can be useful and applicable on the real system. Considering that, when it comes to talking about modelling and simulation it is talked about building a model of a real system and the experimentation possible on it. In this paper we will experiment a methodology to simulate the operating mode of a production system from the automotive industry, formed of several interconnected stages. The techniques and instruments used to make the activities in this methodology are in the fields of flow analysis and comparative analysis.
Risk-cost model for FMEA approach through Genetic algorithms – A case study in automotive industry
Authors: Belu N , Ionescu L M , Rachieru N 
Published: October 2019

Abstract
Failure mode and effects analysis (FMEA) is a proactive method for eliminating the potential failures emerged from various systems such as products, processes, designs, or systems. FMEA utilizes the risk priority number (RPN) to determine the risk priority order of failure modes. RPN is calculated by multiplying the values of three risk factors: severity (S), detection (D) and occurrence (O) Although FMEA techniques are used in different industries in many situations when multiple experts give their opinions about one failure mode, the risk evaluations can be vague and imprecise, which could arise conflicting evidence that is hard to manage. This paper presents a risk-cost analysis model that uses Genetic algorithms to generate an FMEA for the raw materials and finished parts reception process, in automotive industry. Unlike the classic FMEA analysis, in our model the risk factors D and O are determined by resources cost analysis involved in their improvement. Here comes the Genetic algorithm that will determine the optimal cost under an acceptable risk. The proposed solution uses modern information technology for data acquisition (complex event processing), automation of analysis process (artificial intelligence) and long-term support for quality staff in FMEA analysis (real time and batch data analytics).