bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of alkaline earths on EPR spectra of lithium borate glasses doped with Fe (III) ions
Authors: Bhogi Ashok , Kistaiah P. 
Published: June 2020

Abstract
Lithium borate glasses containing Fe (III) transition metal ion having composition 15RO-25Li2O-59B2O3-1Fe2O3 (where R= CaO, SrO and BaO) are synthesized via melt quench route. These glasses were characterized using X-ray diffraction (XRD). Electron paramagnetic resonance spectra of prepared glasses have been studied. The recorded spectra mainly consists of an intense resonance signals at g ∼ 4.282 and also at g ∼ 2.0032 along with a shoulder in the region of g ∼ 8.033 which is a characteristic of iron ions in the (3+) valence state in all the studied glasses. The number of spins participating in resonance (N) and its paramagnetic susceptibilities (χ) have also been evaluated. The spin concentration and the paramagnetic susceptibility at g = 2.0032 and at g = 4.282 increase by the substitution of alkaline earths from CaO to BaO respectively. The peak-to-peak line width ΔB for the resonance lines at g ≈ 4.282 and at g ≈ 2.0032 and the line intensity of the resonance centered at g ≈ 4.282 and at g ≈ 2.0032 have been evaluated. This EPR spectra has been analyzed in the light of different oxidation states of iron ions in order to understand the influence of alkaline earths as modifier oxide on the structure of glass matrix.
Design and Development of a Low-Cost Magnetic Induction Spectroscopy (MIS) Instrumentation
Authors: Bera Tushar Kanti , Maiti Toushik 
Published: June 2020

Abstract
Design and development procedure of a low-cost Magnetic Induction Spectroscopy (MIS) instrumentation has been presented. Along with the mathematical model of the electromagnetic system, MIS instrumentation is developed with two windings of suitable turns using enamelled copper wires of required cross-sectional area. The variable voltage multifrequency function generator developed to generate the magnetic field lines is used to excite the primary coil. The voltage developed at the secondary winding due to the Faraday’s electromagnetic induction principle is acquired to sense the permeability of the different materials placed as the core of the electromagnetic interface. The SNR has been studied for different amounts of voltages and frequencies of the electrical excitation applied at primary winding. The advantages and limitations of the system have been described along with the future work and possible applications of the system.
Synthesis, structure and optical properties of Indium filled CoSb3 nanomaterials
Authors: Uday Kumar M , Swetha R , Kumari Latha 
Published: June 2020

Abstract
The nano-sized InyCoSb3 skutterudites (y = 0.0125, 0.025, 0.0375 and 0.0625) were synthesized by solvo-/hydrothermal method at 240 °C for 24 hours. The surface morphology of as-synthesized samples analyzed by Field Emission Scanning Electron Microscope (FESEM) shows nanoparticles with size of around 50 nm depicting narrow size distribution and Electron X-ray diffraction spectroscopy (EDX) spectrum confirms the purity of the In-filled CoSb3 nanomaterials. The powder X-ray diffraction (pXRD) pattern reveals all the compositions showing diffraction peaks indexed to cubic phase of CoSb3 with Space group

Im

3
¯

. However, no significant variation in the pXRD pattern of In filled CoSb3 as compared to pure CoSb3 justifies the successful filling of voids in cage-like structure of CoSb3 with Indium. FTIR spectra of In filled CoSb3 presents vibration modes below 1000 cm−1 corresponding to Co-Sb bonding and Cobalt complex. A significance of In filling into CoSb3 structure is also evident. A wide absorption has been witnessed from UV region to large part of visible region, hence indicating the effect of nanoparticle, agglomeration and filling.
Growth, Optical and Thermal properties of Co2+ doped copper tartrate single crystals at different environmental conditions.
Authors: Pradeepkumar K V , Jagannatha N , Rohith P S 
Published: June 2020

Abstract
Cobalt doped Copper Tartrate (CoCT) crystals were grown in silica gel medium using single diffusion methods at room temperature, passing semiconductor laser and passing various UV visible radiation. The optimum conditions were obtained by varying parameters such as gel concentration, pH of gel, gel setting time, the concentration of reactance. The presence of cobalt, copper, carbon, and oxygen is confirmed by the Energy dispersive X-ray spectroscopy (EDX). The crystals obtained, are regular or elongated shaped depending on the growth and environmental conditions. The grown crystals are characterized by FTIR and PXRD. TGA studies explain the thermal behavior of the grown CoCT crystal. UV-Vis-NIR transmission spectroscopic analysis measured the energy gap and, to study the optical transparency of the grown crystals.
First-principles study of structural, elastic, electronic and optical properties of cubic perovskite LiMgF3 for novel applications
Authors: Ephraim Babu K. , Neeraja K. , Deenabandhu D. , Vijaya Ratna A. Mary , Venkata Kumar V. , Bueala Kumari K. , Taddesse Paulos , Tewodros Aregai G. , Mehar MVK , Vikram Babu B. , Samatha K. , Veeraiah V. 
Published: June 2020

Abstract
Structural, elastic and optoelectronic properties of materials are important to identify their applications in technology. In the present paper LiMgF3 is investigated to obtain these properties using the highly accurate full-potential linearized augmented plane wave (FP-LAPW) method. The exchange correlation effects are included through the generalized gradient approximation (GGA) and modified Becke-Johnson (mBJ) exchange potential. The structural optimization of LiMgF3 is compared with previous results and is found to be in good agreement with those results. The predicted band structure shows an indirect (M-Γ) bandgap of 6.1 eV. The elastic properties such as elastic constants, anisotropy factor, shear modulus, Young’s modulus, Poisson’s ratio are calculated and based on these calculations it is found that this compound is elastically stable and brittle in nature. The contribution of different bands to the band structure is analyzed from the total and partial density of states curves. Optical properties like real and imaginary parts of dielectric function, refractive index, extinction coefficient, reflectivity, energy loss function, conductivity and absorption coefficient are presented. Based on the optical properties of the compound, it is predicted that LiMgF3 is suitable for optoelectronic devices.
Battery Energy Storage Technologies for Sustainable Electric Vehicles and Grid Applications
Authors: Lakshmi G Sree , Olena Rubanenko , Divya G , Oleksandr Rubanenko 
Published: June 2020

Abstract
The energy consumption in worldwide has been increasing rapidly, due to increase in world population. This energy consumption growth is apparently impacting on the environment and the society. This has accelerated the development and deployment of Renewable Energy Sources (RES) harvesting technologies and facilities. The global electricity production by RES by the end of 2016 is accounted to 24.4%. This increase in RES has highlighted the next big challenge, storage of energy when demand is lower than the supply. There are many energy storage technologies existing from decades. Battery technologies have the highest cost reduction potential at the moment. Battery technologies are delivering significant advances in a wide range of industries, from electrical vehicles to renewable power. From the discovery of electrical energy, there is a great need to store the electrical energy generated for use on demand. Energy Storage Systems (ESS) is used to store the excess electricity when a power production is greater than consumption. ESS play very important role for off-grid storage applications to back up Renewable Energy such as Solar and Wind power, used by people who live or work in remote areas. Electrical energy can be stored in different forms including Electrochemical-Batteries, Kinetic Energy-Flywheel, Potential Energy-Pumped Hydro, and Compressed Air (CAES). This paper gives the current state of battery storage technologies, its main challenges, its applications and actions for future.
Additive Manufacturing for VADs and TAHs - a Review
Authors: Puppala A K , Sonnati V , Gangapuram S 
Published: June 2020

Abstract
Heart disease or Advanced/Congestive Heart Failure (CHF) is one of the serious causes of death. Due to availability of low volumes of donor hearts, there has been an ongoing development of Mechanical Circulatory Support (MCS): Ventricular Assist Devices (VADs) and total heart replacement by Total Artificial Hearts (TAHs) for over 60 years. MCS systems had seen three phases of advancement. The first generation were largely mechanical devices and had pulsatility in their action, but were highly cumbersome, unreliable due to fatigue cracks and required an external pneumatic power and control. Smaller and continuous flow devices are the second generation MCS devices. Because of compact sizing they were suitable for implantations and were more durable than the first generation devices. Problems like pump thrombosis drove the development of motors with levitating or hydrodynamic rotors, leading to the development of third generation devices. Manufacturing of these electromagnetic devices for implantation has to adhere to the constraints of compatibility, space and weight. With the advent of new biomaterials, additive manufacturing is reportedly playing a significant role. Additive manufacturing reported for electromagnetic and electronic components had yielded considerably good performance. This paper reviews materials in electrical and electronics and also in bio medical sector suitable for Additive Manufacturing. An attempt is made to identify the materials that may be suitable for VADs and TAHs and the challenges to use AM techniques that complement each other to create next generation integrated-VADs and integrated-TAHs.
Synthesis and Characterization of Carbazole Based Donor-Acceptor-Donor Type Polymer for NLO Applications
Authors: Balakrishna K. , Sampath R. , Vishwam T. , Samui A. B. M. , Joshi P. , Mohan S.Raj 
Published: June 2020

Abstract
Carbazole based NLO polymer was synthesized by using Knoevenagel condensation. The polymer is found to be fully soluble in high polar solvents like dimethyl formamide and dimethylsulphoxide. By using GPC and tetrahydrofuran as a solvent, the molecular weight is found to be 5000 g/mol. Thermal analysis exhibited thermal stability of the polymer up to 400 °C and glass transition temperature (Tg) at 214 °C. The polymer film has good optical transparency. The non-centrosymmetry in the film was induced by corona poling for second order NLO property, whereas z-scan technique is used to understand third order NLO property. The effective TPA coefficient (β) found to be 5.1 X 10−12 m/W. Computational study indicated that the total charge is located at the center of the molecule in HUMO case whereas in the case of LUMO the charge is spreads out from the center of the molecule.
Experimental Study on Parameters of P-20 Steel in CNC milling machine
Authors: Vardhan M Vishnu , Mohanty Chinmay P , Dhanraj B 
Published: June 2020

Abstract
Milling is the most common form of machining process used in the production of moulds/dies, due to the high tolerances and surface finishes by cutting away the unwanted material. The selection of Pre-hardened steel (P-20) is widely used in production of moulds/dies because of less wear resistance and are used for large components. Due to extensive use of highly automated machine tools in the industry, manufacturing requires reliable models and methods for the prediction of output performance of machining processes. The major objective of the present study is experimental analysis of machining parameters in end milling for surface roughness by considering the input parameters such as cutting speed, feed rate, depth of cut, cryogenic soaking duration.
CYGNO: Triple-GEM Optical Readout for Directional Dark Matter Search
Authors: Abritta Costa I. , Baracchini E. , Bedogni R. , Bellini F. , Benussi L. , Bianco S. , Caponero M. , Cavoto G. , Di Marco E. , D’Imperio G. , Maccarrone G. , Marafini M. , Mazzitelli G. , Messina A. , Petrucci F. , Piccolo D. , Pinci D. , Renga F. , Saviano G. , Tomassini S. 
Published: June 2020

Abstract
CYGNO is a project realising a cubic meter demonstrator to study the scalability of the performance of the optical approach for the readout of large-volume, GEM-equipped TPC. This is part of the CYGNUS proto-collaboration which aims at constructing a network of underground observatories for directional Dark Matter search. The combined use of high-granularity sCMOS and fast sensors for reading out the light produced in GEM channels during the multiplication processes was shown to allow on one hand to reconstruct 3D direction of the tracks, offering accurate energy measurements and sensitivity to the source directionality and, on the other hand, a high particle identification capability very useful to distinguish nuclear recoils. Results of the performed R&D and future steps toward a 30-100 cubic meter experiment will be presented.
Development of a time projection chamber for J-PARC hadron physics program
Authors: Kim Shin Hyung , Ichikawa Yudai , Sako Hiroyuki , Ahn Jung Keun 
Published: June 2020

Abstract
A time projection chamber (HypTPC) has been newly developed for the various hadron physics experiments at J-PARC. The design of HypTPC was carefully considered to cope with the J-PARC high intensity beam. The triple-layered GEM has been adopted as a signal amplification and the gating grid plane for an ion backflow suppression. The octagonal drift volume is defined by the cathode plane and the field cage structure with the height of 55 cm. A target is located inside the drift volume in order to have a large acceptance. The GET (General Electronic System for TPCs) is utilized for the data acquisition. The HypTPC was first commissioned with 230 MeV proton beam at HIMAC. The obtained position resolution is 400–700 µm, which gives the expected resolution of 230–300 µm under a magnetic field of 1 T. We have confirmed the high rate capability of the TPC up to 1 MHz with a good suppression of the ion backflow under the gate operation.
Test Beam Results from sPHENIX prototype Time Projection Chamber
Authors: Ram Niveditha 
Published: June 2020

Abstract
The sequential melting of Upsilon states gives us information about the Debye Screening length of Quark Gluon Plasma (QGP). To observe this sequential melting at RHIC energies of 200GeV, a Time Projection Chamber, as part of the sPHENIX detector assembly, with ability to resolve the Upsilon states is proposed. This paper details the construction of the prototype TPC, the method of analysis of test beam data and its results.
Overview and design of the sPHENIX TPC
Authors: Klest H 
Published: June 2020

Abstract
The proposed sPHENIX detector at RHIC is being designed to study with unprecedented precision the nature of the Quark Gluon Plasma, or QGP, at RHIC through measurement of jets, jet correlations, and Y particles. To reach the goal of producing a high mass-resolution reconstruction of the Y(nS) states, a compact TPC covering pseudorapidities < |1.1| is under construction to provide sPHENIX with the necessary invariant mass resolution. Similar to the ALICE-TPC upgrade, the sPHENIX TPC design presently utilizes quadruple-GEM detectors. As an alternative solution, a double-GEM-Micromega hybrid arrangement is currently being tested. Utilizing novel zigzag patterned readout pads, a modified SAMPA readout chip, and an optimized Ne-CF4 gas mixture immersed in a 1.4 T magnetic field to reduce ion backflow, sPHENIX will have a unique lens into the QGP. The motivation behind the design and innovations of the TPC will be presented, along with the current status of the project.
A numerical investigation on the discharges in Micromegas
Authors: Bhattacharya Deb Sankar , Ströhmer Raimund , Trefzger Thomas 
Published: June 2020

Abstract
The Micro-Pattern Gaseous Detectors (MPGD) have been widely adopted in nuclear and particle physics experiments, for their fast response and other excellent characteristics. To achieve the required signal strength and detection effciency, sometimes they are operated at a high voltage range. This often challenges the limit of high voltage stability of the detector. Discharge in gaseous detectors is a complex process and involves several responsible factors. The microscopic geometrical structures of the MPGDs may itself sometimes induce discharges.
In this study, we are numerically investigating the discharge phenomena in non-resistive Micromegas. Within the COMSOL framework, a 3-dimensional model is developed to observe the occurrence and the development of discharge in Micromegas. The effect of space charge has been taken into account in the calculation. The model allows to vary the geometrical parameters of the detector as well as to study the effects of gas impurities and different number of primary charges.
The triple-GEM detector for the Laser Polarimeter facility at VEPP4-M collider
Authors: Blinov V E , Ivakin V O , Kaminskiy V V , Kudryavtsev V N , Yu Muchnoi N , Nikitin S A , Nikolaev I B , Shekhtman L I , Zakharov S A 
Published: June 2020

Abstract
The Laser Polarimeter is being developed at VEPP-4M collider for beam energy calibration by Resonant Depolarization technique. The essential part of this facility is a photon-tracking detector measuring coordinates of backscattered gammas.
Fast neutron spectroscopy with Mimac-FastN : a mobile and directional fast neutron spectrometer, from 1 MeV up to 15 MeV
Authors: Sauzet N , Santos D , Guillaudin O , Bosson G , Bouvier J , Descombes T , Marton M , Muraz JF 
Published: June 2020

Abstract
In the frame of direct dark matter search, the fast neutrons producing elastic collisions are the ultimate background. The MIMAC (MIcro-tpc MAtrix Chambers) project has developed a directional detector providing the directional signature to discriminate them based on 3D nuclear tracks reconstruction. The MIMAC team of the LPSC has adapted one MIMAC chamber as a portable fast neutron spectrometer, the Mimac-FastN detector, having a very large neutron energy range (10 keV - 200 MeV) with different gas mixtures and pressures. The present paper shows its main features and functionality and demonstrates its potential in the energy range from 1 MeV to 15 MeV.
Micromegas for beam loss monitoring
Authors: Segui L , Alves H , Aune S , Beltramelli J , Bertrand Q , Combet M , Dano-Daguze A. , Desforge D , Dolenc-Kittelmann I , Gougnaud F , Joannem T , Kebbiri M , Lahonde-Hamdoun C , Legou P , Maillard O , Marcel A , Mariette Y , Marroncle J , Nadot V , Papaevangelou T , Shea T J 
Published: June 2020

Abstract
The early detection of beam losses and the alarm to the machine protection system in accelerators are crucial for the safe operation of the machine. In the low energy region of the hadron accelerators, only neutrons and photons are produced in the case of a beam loss. However, photons are also emitted by electrons at the RF cavities, becoming a natural background for losses identification. A new kind of beam loss monitors have been conceived to extend the sensitivity to the low energy region of the high intensity hadron accelerators. They are based on Micromegas detectors sensitive to fast neutrons. The appropriate configuration of the Micromegas operating conditions will allow a fast response, a sensitivity to small beam losses and a suppressed sensitivity to photons. In this paper the operation principle and the system developed for the European Spallation Source will be presented, with focus on the results obtained at different irradiation facilities. First time proof of operation in real conditions, with the detection of beam losses, will be also shown with measurements performed at LINAC4 (CERN).
Means for monitoring the dielectric parameters of liquid media based on quasiperiodic Bragg microwave structures in a coaxial waveguide
Authors: Nasybullin A R , Morozov O G , Morozov G A , Farkhutdinov R V , Gavrilov P V , Makarov I A 
Published: June 2020

Abstract
The main characteristic of the converter element in resonant microwave sensors that determines the sensitivity of the conversion is the quality factor of the resonance line. In structures with periodic inhomogeneity of the classical topology, the quality factor of the circuit at high values of the signal-to-noise ratio may turn out to be low, which entails the emergence of restrictions on the maximum achievable conversion parameters. One of the ways to increase both the Q factor and the modification of other properties of the microwave structure that affect the overall efficiency of the converter element is the use of quasiperiodic elements. The coaxial cable, where the holes in the dielectric act as inhomogeneity, is presented, forming structure with phase shift. Using the method of flow graphs, we obtained the analytical dependence of the reflection coefficient for this structure. The analysis of the frequency response of the microwave reflection coefficient was carried out for different values of the phase shift and the location of the phase shift section along the length of the cable. A numerical and physical experiments were carried out to determine the frequency dependence of the microwave reflection coefficient with a π-phase shift for various values of the automobile fuel permittivity introduced into the cells.
Experimental modelling of apokamp discharge formation under outer electric field
Authors: Kuznetsov V S , Panarin V A , Skakun V S , Sosnin E A , Tarasenko V F 
Published: June 2020

Abstract
A laboratory setup has been created for modeling certain aspects of the initiation process of blue jets in the Earth’s atmosphere. With its help, the influence of an electric field on the apokamp discharge in air at pressures of 180-260 Torr was established. It is shown that the formation of a negatively charged zone located above the channel of a pulse-periodic discharge with a positive potential leads to both initiation and lengthening of the apokamps starting from the channel, and also reduces the voltage amplitude necessary for their formation.
Local video-positioning system for industrial GPR
Authors: Ponomarev O G , Khmelevand V L , Satarov R N 
Published: June 2020

Abstract
This article presents a local positioning system working with the industrial GPR OKO-2 (LOGIS) in the process of radio measurements. Here we discuss principles of the positioning system and the method of transferring location data into the GPR system as satellite data. The location uses a video recording of special tapes, which limit the scanning area. Tapes contain the special periodic pattern. A pair of video cameras are placed directly on the GPR body, cameras will register images of the limiting tapes. Results of experimental approbation of the GPR complex confirm the applicability of the system.
System of automated weather stations to collect and transmit environmental parameters
Authors: Yuzhakov M S , Pavlova A A , Pidotova D A , Badin A V , Filchenko D I 
Published: June 2020

Abstract
Results of the development and application of a weather registration system presented in the article. Concept of creating of distributed automated LoraWAN network of weather sensors to monitor climate parameters in real time is described. The time dependences of temperature, pressure and humidity in the southern part of the Tomsk city (Russia) for the period April-May 2019 are shown. The rate of change of temperature, pressure and air humidity on the night of April 18-19, 2019 was calculated. The possibilities of weather prediction based on meteorological data were estimated.