bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence functionals, decoherence and conformally coupled scalars
Authors: Burrage C , Käding C , Millington P , Minář J 
Published: September 2019

Abstract
Some of the simplest modifications to general relativity involve the coupling of additional scalar fields to the scalar curvature. By making a Weyl rescaling of the metric, these theories can be mapped to Einstein gravity with the additional scalar fields instead being coupled universally to matter. The resulting couplings to matter give rise to scalar fifth forces, which can evade the stringent constraints from local tests of gravity by means of so-called screening mechanisms. In this talk, we derive evolution equations for the matrix elements of the reduced density operator of a toy matter sector by means of the Feynman-Vernon influence functional. In particular, we employ a novel approach akin to the LSZ reduction more familiar to scattering-matrix theory. The resulting equations allow the analysis, for instance, of decoherence induced in atom-interferometry experiments by these classes of modified theories of gravity.
The distance formula in algebraic spacetime theories
Authors: Canarutto D , Minguzzi E 
Published: September 2019

Abstract
The Lorentzian distance formula, conjectured several years ago by Parfionov and Zapatrin, has been recently proved by the second author. In this work we focus on the derivation of an equivalent expression in terms of the geometry of 2-spinors by using a partly original approach due to the first author. Our calculations clearly show the independence of the algebraic distance formula of the observer.
Neutrino nature, total and geometric phase
Authors: Capolupo Antonio , Giampaolo S. M. 
Published: September 2019

Abstract
We study the total and the geometric phase associated with neutrino mixing and we show that the phases produced by the neutrino oscillations have different values depending on the representation of the mixing matrix and on the neutrino nature. Therefore the phases represent a possible probe to distinguish between Dirac and Majorana neutrinos.
Effects of irradiation on antioxidant and antimicrobial activities of Coscinium fenestratum (Goetgh.) Colebr
Authors: Eamsiri J , Chookaew S , Pewlong W , Sajjabut S , Orpong P 
Published: September 2019

Abstract
This study aims to investigate the effects of gamma irradiation on antimicrobial activities (against Staphylococcus aureus and Escherichia coli) and antioxidant activities of Coscinium fenestratum (Goetgh.) Colebr., known in Thai as Haem. Gamma irradiation was applied to powder samples of Haem at 5, 10, 15 and 20 kGy. The 60% ethanolic extracts of irradiated and non-irradiated samples were prepared to evaluate total phenolic contents (TPC), antioxidant and antimicrobial activities. Results indicated that TPC of irradiated and non-irradiated samples was not significantly different (p<0.05), as the TPC values of all samples ranged from 11.39± 1.17 to 11.99±1.10 mgGAE/g. Ferric reducing antioxidant potential and 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity significantly increased (p<0.05) after gamma irradiation at 20 kGy and 5 kGy, respectively. The antimicrobial activity was done using agar disc diffusion method. Results showed that ethanolic extracts of various samples exhibited antibacterial activities against S. aureus as evidence by the clear zone, 16.3 – 17.5 mm, that formed around the disc samples.
Development of genetic sexing strain of the oriental fruit fly, Bactrocera dorsalis (Hendel)
Authors: Limohpasmanee W , Thannarin T , Krongratarporn T , Khamvarn V 
Published: September 2019

Abstract
A genetic sexing strain (GSS) of the oriental fruit fly, Bactrocera dorsalis (Hendel) has been developed in order to release only sterile males to increase the efficiency of fruit fly control by using sterile insect technique. To compare the quality of GSS with the genetic marker strain from a mass-reared colony, it was found that eclosion, flight ability and fertility of GSS equal to 69.57, 53.14 and 47.48 % respectively, which were significantly lower than those of the genetic-marker strain. The adult eclosion, flight ability and fertility of the genetic-marker strain equal to 93.66, 87.00 and 60.48 % respectively. To study the effects of irradiation, the 2-days-before-emergence pupae of GSS were irradiated at doses of 70 and 90 Gy. It was found that sterility and competitiveness index of GSS irradiated at 70 and 90 Gy were 96.15, 97.12 % and 0.51, 0.39 respectively.
Risk assessment to natural radiation exposure from soil samples in the Jasmine rice cultivated area, Roi Et province, Thailand
Authors: Quinram P , Jitpukdee M , Pornnumpa C , Kranrod C 
Published: September 2019

Abstract
Roi Et is one of the provinces with rice farming and exported to many countries around the world. In order to assess the radiation risk index from Jasmine rice cultivated soils, 175 samples in Roi Et province were measured using the gamma ray spectrometry technique for estimating the natural radioactivity levels. The specific activity of 226Ra, 232Th and 40K was found from 7.14 to 29.02 Bq/kg, 7.24 to 33.40 Bq/kg and 18.17 to 129.65 Bq/kg with a mean value of 16.92 ± 1.16 Bq/kg, 16.99 ± 2.24 Bq/kg and 46.95 ± 6.79 Bq/kg, respectively. However, the values of radium equivalent activity (Raeq), the external hazard index (Hex), the gamma-absorbed dose rate (D) and the annual effective dose equivalent (AEDEout) were also calculated to evaluate radiological hazards. The average values of Raeq, Hex, D and AEDEout were found to be 44.83 Bq/kg, 0.12, 20.03 nGy/h and 0.02 mSv/y, respectively. From the results can demonstrate that the natural radioactivity from soil are not affect to population in the area, which the natural radioactivity levels and the radiation risk values of Roi Et soil samples are lower than the UNSCEAR values.
Wastewater treatment by dielectric barrier discharge plasma
Authors: Tanakaran Y , Matra K 
Published: September 2019

Abstract
This paper presents the influence of atmospheric non-thermal plasma on household wastewater by using dielectric barrier discharge (DBD) plasma generator. The model was designed in a vertical coaxial tube shape. The high voltage was supplied from high frequency AC power supply to the model for plasma generation at 0 (control group), 10, and 15 kV. Wastewater was released from the top of glass tube passing through DBD corona discharges that was generated between the needle tips and the glass tube, flowed down to the storage tank, and pumped to the top of the model again. The treatment process was operated for 30 minutes with the flow rate of water at 2 min/L. From the experimental results, it shows that all plasma treatment conditions could improve the wastewater quality. The best results were found at 15 kV plasma treated wastewater; the alkalinity, dissolved oxygen (DO), and conductivity were increased from the control group for 10.48%, 10.09%, and 17.79%, respectively. In addition, biochemical oxygen demands (BOD), and chemical oxygen demand (COD) were decreased from the control group for 7.5 times and 37.5%, respectively. An offensive odor of wastewater could be also improved.
The Impact of Electron Beam Irradiation in Topaz Quality Enhancement
Authors: Maneewong A , Pangza K , Charoennam T , Thamrongsiripak N , Jangsawang N 
Published: September 2019

Abstract
Most of the natural topaz is found as colorless. Variety attempt have been used to change its color. In this study, the process of enhancement by electron irradiation be carefully taken by consideration on the optimization of power and energy of electron, efficient cooling system, annealing process and radioactivity occurring and remaining. Electron irradiation was performed on topaz originated from Yen Bai province, in Vietnam. The two of topaz sample were irradiated by 20 MeV electron beam (e-beam) with different fluences of 1.34×1016 cm−2 and 2.64×1016 cm−2, respectively. The characteristic spectra obtained from the investigation compared to the natural topaz sample afterwards. Interaction of radiation with impurity ions in topaz sample during irradiation resulted in changing of colorless to sky blue topaz, which had the broad absorption band of UV-Vis spectroscopy at 620 nm. The ESR spectrum of topaz sample showing a single broad isotropic line with g = 2.012 that are correlated with an O-center in the topaz structure. FTIR spectra indicated that sky blue color may originate from the decomposition of hydroxyl group (OH) by the electron beam irradiation.
Numerical tracking of impurities by dust ablation in HT-6M plasma
Authors: Somboonkittichai N , Kijamnajsuk P , Fukuyama A , Coppins M , Nisoa M , Nipakul P 
Published: September 2019

Abstract
HT-6M will be officially installed in Thailand in next few years. Some computational studies of possible experiments should be helpful in case of its experiment planning. The authors are interested on the scenario of macro-particle, i.e. dust and droplet, transporting in HT-6M. The study was carried out by the Dust and Droplet Tracking (DDT) code, consisting of basic equations and physical models involving with charging, heating, equation of motion and ablation on macro-particle in a tokamak plasma. DDT implemented a set of HT-6M core plasma profiles from the Transport Analyzing System for tokamaK (TASK) code and a set of HT-6M edge plasma profiles approximated from simple SOL model. We observed that relatively small macro-particles, i.e. initial sizes are less than 10−6 m, significantly involve with impurity generation near plasma facing components (PFCs). In addition, the 10−5-m macro-particles mostly ablate in SOL. The 10−3-m and 10−4-m macro-particles completely ablate if they transport towards core plasma, but some with the inclination with respect to the horizontal direction obtain longer lifetimes. Moreover, few of them can achieve abnormal high speed. The mechanism for this is the acceleration by rocket force due to partial ablation near core plasma.
Metal coin error study using 3D modelling and FEM Analysis
Authors: Gavrila C C , Lates M T 
Published: September 2019

Abstract
Mints around the world produced a large amount of metal coins currency. Besides the coin basic design, in most of the situations, various amount of coins wearing different error types are released. The error type is depending on the coin metal, dimension and also by manufacturing step where it could appear. This coins and medals with mint errors are searched by collectors around the world. The paper presents some aspects about the cracked dies error, which appear at the coin striking tools or coin properly strike, because of some dies misalignments, failures and the reduced relief dimension. In the first part of the paper, some aspects about the cracked dies error are presented, with some particular examples. Then, the simplified dies 3D model is presented. Also, the finite element analysis on this model is realized and is achieved for different initial conditions. In the paper final part the analysis results and conclusions are presented.
Tribological properties of the PA46 and Teflon added PA46 polyamides
Authors: Lates M T 
Published: September 2019

Abstract
In order to increase the efficiency of the mechanical transmissions, one of the actually research directions is oriented to develop new materials characterised by high endurance, small friction coefficients and internal structure stability with the temperature. One of these materials is represented by the polyamides which are used in mechanical industry, food industry and medicine. The paper provides the results of tests performed on a tribometer for a PA46 and a Teflon added PA46 polyamide materials being on contact with a PA46 polyamide disk, in lubricated conditions. The tests are achieved for a set of temperatures of the oil bath, a set of rotational speeds of the PA46 polyamide disk and a continuous variation of the local pressure. During the running-in process there are measured the evolution of the dynamic friction coefficient and of the wear. After this, it is studied the variation of the dynamic friction coefficient with the contact pressure, the rotational speed and the temperature. Finally there are given conclusions regarding the tribological behaviour of the tested materials and regarding their applications.
Study of the mechanical and electrical characteristics of the synchronous motor with varying resistive torque
Authors: Cristea C , Stroe I 
Published: September 2019

Abstract
The paper presents the mechanical and electrical characteristics of the synchronous motor for imposed moment variations at the shaft. The test setup is presented, used to determine the electrical and mechanical characteristics of the synchronous motor. Modelling the resistive torque allows the loading with different torsion vibrations. It is presented the used experimental workbench in order to determine the mechanical and electrical characteristics of synchronous motors in such conditions. The engine torque model allows the shaft to be loaded with variable resistive torque values generated by an electromechanical brake. The characteristics presented show the mechanical characteristic of the synchronous motor. Mechanical rotation speed characteristics are presented based on the variation of the resistive torque for 40 seconds, taking note of the value of the resistance when the motor exits synchronism. The determination of these characteristics are made based on the variation of the excitation current applied to the rotor winding of the synchronous motor.
Aspects regarding corrosion and mechanical tests for metallic parts obtained by Powder Metallurgy
Authors: Didu A , Pascu I , Gheorghe S , Rotea C 
Published: September 2019

Abstract
The researches for this paper were made for knowing the corrosion behavior and mechanical resistance of some metallic powder’s specimens obtained by powder metallurgy. This technology was chosen because of the technical and economic advantages, and the obtained parts can be used in all domains. The parts were obtained from iron powders by pressing at different pressures and sintered in an inert atmosphere. The innovation was to obtain metallic composites, having as a matrix an iron powder type Ancorsteel 1000B and as a reinforcement a spring steel wire. The specimens were tested in different solutions and environments and also two mechanical tests. This paper presents a part of tests that were the corrosion in salt spray environment and bending tests, aiming to compare the results for the types of proposed specimens. For the morphological characterization (size, shape, surface) and chemical composition of the material used, SEM electronic microscopy was used using an FEI Inspect S microscope. The sintering was made in a neutral controlled atmosphere (argon) furnace.
Notes on the possibilities and limitations of using topological tools in mechanical modeling of media
Authors: Lámer G 
Published: September 2019

Abstract
In the mechanical modeling of the media, the atomic-molecular structure of the material is usually neglected, furthermore, with regard to the characteristic distance of the atomic-molecular structure, the media is considered to be a continuous material distribution. Referring to the continuous distribution, we use the tools of differential and integral calculus for the mechanical-mathematical description of the media. The use of these mathematical tools has conditions and limitations: there must be a sort of topological order in the examined space. This order records the relative position of the points. The fixed position relative to each other makes it possible to describe only such mappings that retain the fixed position relative to one another. Thus, it is possible to distinguish between strain and rearrangement, and at the same time to define the boundaries of the possibilities offered by the applied mathematical tools: the continuum many points set provides the basis of the topological description for the classical continuum, a set of finite points in the grid network with its internal structural features, provides the basis of the topological description for the grid (that is generalized) continuum.
The theoretical bases and study parameters with FEA application approach on a bending tool design
Authors: Negrău D C , Grebenişan G , Vesseleny T 
Published: September 2019

Abstract
This paper presents the theoretical basis of the approach to Finite Element Analysis (FEA) techniques and their application in the case of a bending request for a piece of aluminum sheet. The plate of a bending device deforms elasto-plastically under the action of the drive forces of the device, but also under the action of the reaction forces in the supports, more for a material such as aluminum and a few times less for a structural steel. If the forces acting on the device deform the carrier plate, which is in the operator’s attention, in the elastic field, then there is no danger of permanent deformations occurring. Conversely, if deformation exceeds the threshold of elastic deformation, the material undergoes plastic deformation stresses, then the piece deforms plastic, with the risk of permanent deformations occurring. These deformations, in the first place, can generate production errors, or device failure, by modifying the execution rates and the games in the studied ensemble. This is precisely the purpose of this work: to prove, with the results of the FEA, that in the case of a certain material, with the same configuration of working conditions, the system can function without producing errors, obtaining qualitatively conformable parts.
Concept and premises of the logistic management model in conditions of uncertainty - research approach
Authors: Marzantowicz Ł. , Dembińska I. 
Published: September 2019

Abstract
The article aims to present the results of the preliminary study, defining the premises of the concept of creating a model of logistic management in conditions of uncertainty. The focus group interviews (FGI) determined the premises for building the concept of logistics management in conditions of uncertainty, and then a catalog of methods for building this model was selected. The results allowed to make general conclusions that the model of logistic management in uncertainty is possible to develop, which in turn allows setting the target for the proper research.
Strategic Communication Process: Support for Performance Measurement and Popularization of SMEs Innovations – II
Authors: Hulubei (Georgescu) A , Avasilcăi S 
Published: September 2019

Abstract
This paper analyzes the advantages of the strategic communication process from an online and a digital point of view, as most companies make their changes from the off-line into the online market. Through this aspect, the company can quickly adapt to the fast changes of the industry or of the market requirements, to connect better with its stakeholders, to fulfill their requirements, and generate more revenues. Having in mind that the market is always changing, entrepreneurs must constantly reanalyze and rethink their actions and their communication strategies to remain relevant and desirable for their stakeholders. In the last part of the article, we have analysed the example of a traditional SME manufacturer company from Romania that had to make its way in the digital world and develop new markets, in order to strengthen its position in the many years of economic existence and to respond to a possible crisis that could have drastically affect its business.
An overview of strategic issues in the evolution of its industry
Authors: Bagiu N , Avasilcăi S , Alexa L 
Published: September 2019

Abstract
The purpose of this paper is to find a balanced way to analyse IT (Information Technology) industry, from its value perspective, but first we need to know how to define the IT industry, what are its component and the dynamic on global industry. This is an empiric study due to an enormous information quantity – only a simple search on EBSCO platform, looking only for Academic journals, retrieve 183.508 titles where “Information Technology” keywords were used. For same keywords Google Academic retrieve approximately 6.000.000 results in its search. As part of the economy modernization trends, the software industry plays a natural engine role - most of the company’s efforts being based on the IT, especially the software component. With the omnipresence of mobile phones and the customers demanding more and more personalized experiences, the software industry continues to stay at the forefront of the business agendas in most of the companies.
Comparative analysis of different heating systems based on the surface area of a household
Authors: Cristea C , Cristea M , Tirnovan R , Fagarasan C 
Published: September 2019

Abstract
The scope of this paper was to determine if the efficiency of a heating system depends on the surface area of a household and to identify the surface intervals for which a heating system is most appropriate than others. There were considered nine alternatives for the analysis: five different heating sources (wood boiler, electric boiler, gas boiler, pellet boiler and electric heating carpet) combined with two different heating terminals (radiant floor heating and the classic radiator), which were evaluated based on initial investment, fuel cost and the total annual expenditure for each heating system. The results indicated that the type of heating system for a household might vary depending on its surface, considering the three comparison factors mentioned before.
Video analysis system of the gait cycle and posture of people wearing high heels
Authors: Baritz M. I. 
Published: September 2019

Abstract
Gait cycle analysis is a comprehensive source of information, usable in the medical field, in locomotion, sporting recovery procedures or to increase performance in various sporting fields. Study methods of walking cycle parameters are very diverse, starting from biomechanical analysis, computer simulations and modelling, and completing with video analysis of kinematic and dynamic parameters. The use of optical and video methods is very widespread in all medical, sporting, ergonomic and even economic fields. Thus, the first part of the paper analysis the general aspects regarding the use of optical methods of acquisition and processing of video sequences of the normal gait cycle. Also, in the same context of the introductory part of the paper the aspects of the biomechanics of the normal and high heels cycle for the females are presented. In the second part of the paper is presented an experimental setup for investigating, with the sample of subjects chosen, the cycle of gait with shoes having different dimensions of the heel height. In the third part of the paper are presented the recordings made on footscan pressure plate and also the data acquisition on the especially sensory insole worn by the subjects. In the final part of the paper are presented the results of the processing of this information and the conclusions from the experiment.