bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ellipsometric determination of the thickness and the refractive index of superficial films deposited on metal mirrors
Authors: Berdie A D , Jitian S 
Published: January 2020

Abstract
Ellipsometry is an optical method that allows very accurate determination of the optical constants of surfaces or determination of the thickness and optical constants of superficial films on solid substrates. If the determination of the optical characteristics of transparent superficial films is relatively simple, at least two ellipsometric measurements are required for optically absorbent films: at two different angles of incidence or using two different incidence media. This involves additional problems with errors related to the realignment of the ellipsometer. Ways to obtain the thicknesses and optical constants for thin or thick transparent or non-transparent superficial films are presented. A simple graphical method is presented to determine the thicknesses and optical constants of thin absorbent films with non-uniform thickness.
The construction of an automated bicycle parking
Authors: Labudzki R , Patalas A , Talar R , Szadkowska D , Wierzbicka N , Zawadzki P 
Published: January 2020

Abstract
Nowadays, the bike is so common and popular that with the development of technology, man began to create all kinds of facilities for this mode of transport. On the market you can find various modifications and special-purpose accessories created for the bike. One of these amenities are special parking spaces for bicycles. They were created in order to facilitate its detention by people who do not have such a possibility in homes or to provide a specially adapted place to temporarily leave it during the day. The paper presents a proposal for the construction of an automated bicycle parking based on the geometry of the circle.
Dynamic circulation in curve with R = 300 m radius for C.F.R. 060 - EA 5100kW electric locomotive
Authors: Ursu-Neamţ G V 
Published: January 2020

Abstract
In the paper we study the dynamic circulation in curve with 300 m radius of rail for C.F.R. 060-EA 5100kW electric locomotive. This study verifies simultaneous disposition of bogies in diagonal, intermediary and string positions through determination of dependences for lead forces, guide forces, centrifugal forces and of polar distance towards speed. We also verify safety against derailment, and we determine maximum circulation speed admitted in curve.
Analytical investigation of an inertial propulsion system using rotating masses
Authors: Gerocs A , Korka Z I , Biró I , Cojocaru V 
Published: January 2020

Abstract
The paper proposes an inertial system capable of generating a propulsive force from the rotation on an eccentric circular path of 8 steel balls placed between two rotating discs constructed with a radial slot system. In addition to a detailed description of the mechanical components of this proposed device, particular attention is paid to the theoretical treatment of the innovative principle upon which the device is based. The paper begins by detailing the equations of motion of the steel balls, from which the propulsion force of the system is computed. Furthermore, the influence of the ball radius on the propulsion force is investigated. The obtained findings support the capability of the proposed system to achieve a linear propulsive force.
The power chopper with forced extinguish and command realized with FPGA
Authors: Baciu I , Cunţan C D , Gherman P L 
Published: January 2020

Abstract
This paper presents the operation of a chopper power with forced extinguish of reactive RC circuit whose control is obtained from a FPGA board (Nexis4DDR) for the adjustment of the frequency of the control software of the thyristors. Control signals for the two thyristors are obtained by dividing the clock frequency of the FPGA board which controls a 2-bit counter circuit made with flip-flops. The output of the FPGA board is connected to a current amplifying circuit realized with bipolar transistors in Darlington connection and a circuit for the galvanic separation with the pulse transformers and power supplies for opening the thyristor. The maximum frequency command value is limited by the recovery time of the main thyristor.
Researching and modelling of unbalanced regimes in systems of household electric power consumers
Authors: Miroshnyk O , Kovalyshyn S , Bałdowska-Witos P , Kruszelnicka W , Tomporowski A 
Published: January 2020

Abstract
The modelling of the operation modes of the 0.38/0.22 kV power supply systems by the Monte Carlo method using the Electronics Workbench computer program is considered, and statistical processing of simulation results and testing of the Pearson distribution law hypothesis using the Mathcad program are carried out. An analysis of existing power supply systems has been carried out and an alternative, economically feasible version of the power supply system is proposed, where consumers are powered by low power transformers mounted on supports. The performed studies showed that the variation of the load currents in the segments and the losses of electric energy in an asymmetrically loaded network of 0.38/0.22 kV are subject to the normal distribution law and that the consumers who feed on the traditional power supply system have unsatisfactory quality of electrical energy.
Testing the functionality of the safety belts of road vehicles in the production process phase
Authors: Alexa V , Cioată V G , Raţiu S A , Dascăl A A 
Published: January 2020

Abstract
The safety belt is an essential element of the concept of passive safety of road vehicles (passenger transport). The functionality of seat belts is an imperative requirement for road vehicle manufacturers, requiring analyses and tests from the design stage. The present paper proposes a review of the retractor-shutter assembly during the production process phase in order to increase the quality and eliminate the manufacturing defects.
Study of the contact forces between workpiece and fixture using dynamic analysis
Authors: Cioată V G , Kiss I , Alexa V , Raţiu S A 
Published: January 2020

Abstract
In the machining process, the workpieces are installed in machining devices in order to establish a strictly determined position with the cutting tool or its trajectory. During the cutting process, the weight of the workpiece, the forces and moments of inertia, cutting forces and moments, clamping forces, the heat released during the cutting process determine the contact forces between the locators and the workpiece. The magnitude of these forces is important because too large value can destroy the surface of the workpiece, and a too small value can cause the workpiece to slip on the locators or even the loss of the contact with the workpiece. Both situations must be avoided. In the paper is presented a study regarding the determination of the magnitude of the contact forces in dynamic condition using dynamic analysis realized with a CAE software.
Experimental design investigation of through-transmission laser welding of dissimilar polymers
Authors: Ilie M , Stoica V , Cicala E , Kneip J C 
Published: January 2020

Abstract
In the present study, the laser weldability of several types of dissimilar polymers couples are investigated using the experimental design method. This experimental strategy allowed to quantify the influence of the operating parameters on the failure force of the welded specimens. Some preliminary tests were used in order to find the initial conditions for the design of the experimental matrices. Based on the conclusions drawn from these preliminary tests, exploratory experimental designs were used to advance towards the optimum for each couple of polymeric materials. The polymeric materials considered were: ABS and PA11 with different pigments and thickness. One could note that the laser power used is the most important parameter on the mechanical resistance and the weldability is assured in a narrow interval of power laser. An important clamping pressure and two laser passages are useful to improve the performances of the weld strength.
Case studies for automotive components using CAD and CAE techniques
Authors: Stroia M D , Moşteanu D E , Virca I , Răduca E , Popescu C , Haţiegan C 
Published: January 2020

Abstract
In the present paper we present model of 3D components, parts of power supply system found in automobiles. 3D designs of components are obtained using modern techniques of computer systems which implies the means of CAD software. Following components designing, an analysis of obtained models was made, considering static, mechanical and thermal stresses. These studies were made by means of numerical simulation, using CAE techniques, and have the purpose of optimizing geometrical shapes of designed components in the terms of their weight, in the same time maintaining their mechanical and electrical characteristics. From weight optimizing of automotive components ensues significant savings of material and energy consumption, this being a sensitive topic in automotive industry, whether we talk about classical, electrical or hybrid automobiles. Modelling and simulation was made using finite element analysis of SolidWorks2010 software and the obtained results could be used in the process of part production from automotive.
Testing of electrical parameters at direct start-up of a synchronous motor of 4650 kW/6 kV
Authors: Răduca E , Haţiegan C , Molnar M , Anghel D , Stroia M D , Liuba G 
Published: January 2020

Abstract
The paper presents parameter testing in the transitory process of direct start-up of a synchronous motor of 4650kW/6kV used in actuating of natural gas compressors from storing stations. The electric drive motor is of synchronous type with rotational excitation and the actual operating conditions of it determine additional mechanical and electrical stresses, which can influence its performance. The asynchronous start-up mode assumed experimental determination of asynchronous start-up current values, asynchronous start-up time, excitation voltage and excitation current of exciter, voltage drop in stator winding. These experimental determinations were made using a dedicated data acquisition system. Graphical plotting was made and considered parameters were evaluated in continuous mode, then obtained values were compared with catalogue values, with conclusions being drawn for each case study.
Analysis of the fluid dynamic behaviour through the air collector following the installation of pressure outlets
Authors: Bucevschi R , Socalici V , Berghian A Budiul , Birtok Băneasă C 
Published: January 2020

Abstract
This study is a preliminary investigation to determine the feasibility of creating an experimental model of pressure analysis at different points in the air intake system of an internal combustion engine. The purpose of the CFD analysis is to determine whether or not the value of the pressure obtained from the air intakes is influenced by their geometry or position. The study presents both the results of the analysis and the steps and parameters used in the numerical modeling process. The software used to create the numerical model is Fluent from the suite of software provided by Ansys under the academic license.
Capitalization possibilities of small ferrous and pulverous waste in the iron production industry
Authors: Lupu O , Socalici A , Bucur F , Ardelean E 
Published: January 2020

Abstract
Small ferrous and pulverous waste are resulted from the industry and can be processed through agglomeration, briquetting or pelleting based on the granulometric features of the waste. For the current paper, the agglomeration/briquetting method has been used and it has been made for waste resulting from the iron production industry. The laboratory experiments are pressed, together with the qualitative and quantitative tests of the experimental agglomerate/briquette. The achievement of by-products can be used as raw material in the making cast iron or steel and it permits an efficient optimizing of resources in the context of durable development, also bringing along economical and ecological advantages.
Research on the transient regime of SF6 circuit breakers in MATLAB
Authors: Ciulica D 
Published: January 2020

Abstract
In this paper is presented a Matlab application for studying the connection and disconnection of circuit breakers. The application has a graphical user interface where it is possible to modify the simulation parameters of the connection and disconnection operations. The simulation parameters can be changed in an intuitive way. The application can also be used for educational purposes to study phenomena that occur during the connection or disconnection process.
Knowledge graph using resource description framework and connectionist theory
Authors: Lourdusamy Ravi , Mattam Xavierlal J 
Published: January 2020

Abstract
Interest in Knowledge Graph has peeked these years. The use of RDF triples for the construction of knowledge graph has been limited by the fact that the vector embedding of RDF to make it machine readable has been constraining factor. This article presents the use of weighted RDF as a vector embedding of RDF that could be used with Bayesian networks in Graph Neural Networks. The vector embedding helps in representing the weights on RDF that could be obtained using Bayes theorem of assessing probability. The resulting weighted RDF could be used in many applications. The use of it in a Clinical Decision Support System is given as a simple illustration together with the calculation of the weights using Bayes theorem. The weighted RDF in Graph Neural Network will represent the knowledge graph using RDF and connectionist theory.
MRI image compression using multiple wavelets at different levels of discrete wavelets transform
Authors: Narayana Prakash S , Khan A M 
Published: January 2020

Abstract
Medicine is benefited in large amount with the utilization of imaging. Magnetic Resonance Imaging (MRI) is an important imaging modality that is used for better diagnosis. Since the number of images generated by MRI is in large number per patient, the requirement for storage space and transmission bandwidth will be larger. In the area of image processing, image compression finds an important application that reduces storage space and transmission bandwidth. One way to compress the image is by using transform based techniques. In this work, we have used DWT (Discrete Wavelet Transform) with multiple wavelets at different levels to transform the MRI images. In the first few levels CDF (Cohen–Daubechies–Feauveau) 9/7 wavelet is used for transformation and Haar wavelet is used for remaining levels. After transformation SPIHT (Set Partitioning In Hierarchical Trees) algorithm is used for compression of the images. We have observed better compression in terms of MSE (Mean squared Error) and PSNR (Peak Signal to Noise Ratio) with the proposed method in comparison with the single wavelet transformation.
Twitter Sentiment Analysis on Airline Tweets in India Using R Language
Authors: Sreeja I , Sunny Joel V , Jatian Loveneet 
Published: January 2020

Abstract
Every day, passengers from all parts of the world are carried over to various destinations in about 100,000 flights. And their experience in the journey is almost unknown to the airlines. Gaining knowledge on customer opinions on the airlines is very crucial as it is very difficult for the Indian Airlines to collect customer feedback. Also, the understanding of the degree to which customers are satisfied is vital for the strategy development for the company. And hence, twitter data is utilized for the same purpose. Twitter is the best possible to way to obtain such information. This paper focuses mainly on the analysis of customer views on Indian Airlines services. Data visualization is used here for displaying customer feelings which can be anger, fear, anticipation, trust, surprise, sadness, joy and disgust. Whole together their opinion can be sentiments such as positive and negative.
Artificial Intelligence Algorithms and Techniques in the computation of Player-Adaptive Games
Authors: Ranjitha M , Nathan Kazaka , Joseph Lincy 
Published: January 2020

Abstract
A game usually used as a synonym for entertainment also serves as an educational tool. Originally targeting the enjoyment, the meaning of the game has evolved to much greater conceptions and applications. Games require physical or mental or sometimes both the simulation. Many games help develop practical skills, serve as a form of exercise, or otherwise perform an educational, simulation, or psychological role. Having to be built on some key elements, which are goals, rules, challenge, and interaction. Various strategies and algorithms such as path finding and decision trees, have been developed to simulate those interactions between the human user and the computer in front of him. In video games, artificial intelligence (AI) is used to generate responsive, adaptive or intelligent behaviours primarily in non-player characters (NPCs) similar to human-like intelligence. This paper makes a short analysis of those preferred techniques and suggest from the study and the outcomes, the efficiency of each. The paper also focuses on the heuristic function, implementation platforms and design guidelines of the various searching algorithms used in adaptive games.
A structured approach to implementing Robotic Process Automation in HR
Authors: Balasundaram Sathiyaseelan , Venkatagiri Sirish 
Published: January 2020

Abstract
Technological innovations are changing the industrial landscape. As technology transforms the world, the HR function needs to focus on embracing automation and other technologies that promise efficiency, service effectiveness and cost savings. Deployment of robotic process automation (RPA) can help (a) to offer better service to employees and managers (b) ensure compliance of HR processes with standards and regulations (c) facilitate rapid initiation and completion of HR processes (d) enhance efficiencies by digitizing data and auditing process data (e) improve HR productivity and cost savings by automating manual and repetitive tasks. A robust and structured approach needs to be in place to identify HR processes that can be automated using the RPA approach. In this paper the authors (a) suggest a four step approach – validation, assessment, evaluation and classification - to analyze processes and verify their suitability for automation using RPA (b) identify HR processes that has relevance for the RPA approach within the broad areas of HR Strategy, Talent Acquisition, Talent Development & Performance Management, Compensation & Benefits, HR Operations and Employee Relations (c) recommend a process for mapping HR RPA propensity. A case study is also presented for greater clarity on adoption of RPA in HR processes.
MAR_Sybil: Cooperative RSU Based Detection and Prevention of Sybil Attacks in Routing Process of VANET
Authors: Kabbur Mahabaleshwar , Arul Kumar V. 
Published: January 2020

Abstract
VANET is a next generation communication technology where vehicles create an autonomous network with assistance of RSU (Road Side Units). VANET provides legitimate information to the users on the road, in order to increase the road and user’s safety. It provides useful information to the vehicles about directions, location mapping, premises, etc. The fast propagation of emergency and local warning messages to the approaching vehicles will be helpful for preventing secondary accidents. If security of the network is not guaranteed, several attacks may occur, thereby alert messages may not reach to the RSUs on time or message may get spoof due to attack on it. Major attacks on emergency messages such as timing attack, spoofing attack, DoS attack, Sybil attack, etc. would be considered to mitigate and make the communication and infrastructure more secure. One of the major emergency message attack is Sybil, which is used by selfish message propagators to claim authenticity of their message by propagating with multiple identities. By deceiving other nodes with their false support using multiple identifies, they can achieve various purpose in network like vehicle re-routing, speed shift etc. This work proposes a RSU cooperative detection mechanism involving triangulation and fake propagation by RSU to identify the Sybil attacks in the VANET. The proposed methodology secures fast communication emergency messages to prevent secondary accidents by validating the message sources, nodes will accept only the messages from RSU which are digitally signed and source validated against Sybil nodes. The performance evaluation is made with existing methodology and effectiveness of the proposed methodology results demonstrated in article. The spatial location and trajectory of attacker is learnt effectively with RSU cooperation in the proposed work.
Security of Vehicular Ad-Hoc Networks (VANET): A survey
Authors: Afzal Zehra , Kumar Manoj 
Published: January 2020

Abstract
In the previous couple of years, various types of researchers concentrate on Vehicular Ad-hoc networks (VANET) field due to various facilities it provides. VANET a subgroup of mobile ad-hoc network (MANET), refers to a group of intelligent nodes i.e. (vehicles) on the road. These intelligent vehicles interact with one other or with the road side unit (RSU) for providing safer roads and a more efficient driving experience and providing security against attackers. In VANET messages are conveyed in an open wireless channels Security is therefore the most concerning issue in VANET. In this paper several types of the security issues, requirements, attacks, attackers in VANET have been described and some recent solutions to solve the security problems with their advantages and disadvantages have been discussed.
Nonlinear thermal convection on unsteady thin film flow with variable properties
Authors: Prasad M. Karuna , Naveenkumar S H , Raju C. S.K. , Upadhya S.Mamatha 
Published: January 2020

Abstract
This study portray the influence of variable viscosity, thermocapillarity, nonlinear convection, variable thermal conductivity on the laminar flow and heat transfer in a liquid film on a horizontal stretching sheet. Time dependent flow equations are transformed to coupled ordinary equations by the assistance of similarity transformation. Numerical results are obtained via applying Runge-kutta and Newton’s methods. For some representative value of the parameters graphs are exhibited and surface skin friction coefficient and heat transfer are presented in tabular form. It is observed that non-linear convection case shows higher velocity and associated boundary layer thickness compared with linear convection. Elapsed time is more in nonlinear convection for growing values of A, δ, Pr and M compared to linear convection.
Architectural Tourism Development Model as Sustainable Tourism Concept in Bandung
Authors: Permana A Y , Susanti I , Wijaya K 
Published: January 2020

Abstract
Bandung is famous tourist destinations in Indonesia which experiences rapid tourism development. It is supported by city’s diverse tourism potential, include in: nature, culture, heritage building, culinary, fashion, recreation, and entertainment. Moreover, infrastructure and public facility improvement increase tourism attractiveness of Bandung. Two major infrastructure projects, namely Cipularang Toll and Jakarta - Bandung Fast Train will support Bandung tourism development. This condition is benchmark of Bandung tourist attractions. To maintain such potential, it is necessary for Bandung to have programmed, structured, and controlled tourism development model. Current tourism model is inclined to sustainable industrial concept preserving environment and local culture. Tourism programme is directed to generate income and green employment, with regard to conservation. This study aims to assist planning and management of sustainable tourism development by increasing level of understanding on how tourist destinations develop and change. Results of this study can be taken into consideration for stakeholder to develop a framework for strategic planning toward economically, environmentally and culturally sustainable tourism.