bluuebunny/crossref_metadata_2025 huggingface dataset:
Assembling Si2BN nanoribbons into a 3D porous structure as a universal anode material for both Li- and Na-ion batteries with high performance
Authors: Younis Umer , Muhammad Imran , Wu Wei , Ahmed S. , Sun Qiang , Jena Puru
Published: August 2020

A porous 3D-Si2BN structure is assembled from the nanoribbons of a 2D monolayer Si2BN sheet, and is meta-stable energetically while being stable chemically, dynamically and thermally, exhibiting high theoretical capacity and low energy barriers for both Li and Na ions.
Exploring the behavior of the NFSI reagent as a nitrogen source
Authors: Sushmita  , Aggarwal Trapti , Kumar Sonu , Verma Akhilesh K.
Published: August 2020

Applications of theN-fluorobenzenesulfonimide (NFSI) reagent in organic synthesis.
Thermoresponsive behavior of poly[trialkyl-(4-vinylbenzyl)ammonium] based polyelectrolytes in aqueous salt solutions
Authors: Karjalainen Erno , Suvarli Narmin , Tenhu Heikki
Published: August 2020

A systematic method to induce thermoresponsive behavior for polycations with salts from the reversed Hofmeister series is introduced.
Preparation, photo-induced deformation behavior and application of hydrogen-bonded crosslinked liquid crystalline elastomers based on α-cyanostilbene
Authors: Liu Zui , Liao Junqiu , He Lifang , Gui Qin , Yuan Yongjie , Zhang Hailiang
Published: August 2020

A series of high-performance α-cyanostilbene-based photoresponsive LCEs were prepared, and their application in information encryption materials was also explored.
A combined experimental and computational approach reveals how aromatic peptide amphiphiles self-assemble to form ion-conducting nanohelices
Authors: Wang Yin , An Yaxin , Shmidov Yulia , Bitton Ronit , Deshmukh Sanket A. , Matson John B.
Published: August 2020

Salt-triggered conversion of nanoribbons into nanohelices was studied experimentally and computationally, revealing unexpectedly high ionic conductivity in these self-assembled nanomaterials.
A review of molybdenum disulfide (MoS2) based photodetectors: from ultra-broadband, self-powered to flexible devices
Authors: Nalwa Hari Singh
Published: August 2020

Two-dimensional transition metal dichalcogenides have attracted much attention in the field of optoelectronics due to their tunable bandgaps, strong interaction with light and tremendous capability for developing diverse van der Waals heterostructures with other nanomaterials.
Nanocellulose–organic montmorillonite nanocomposite adsorbent for diuron removal from aqueous solution: optimization using response surface methodology
Authors: Ma Chengxiao , Yi Lijuan , Yang Jie , Tao Junhong , Li Junfeng
Published: August 2020

CNCs and CTM were combined to obtain a nanocomposite used to remove diuron in water. The adsorption of the nanocomposite was analyzed using response surface methodology, isothermal adsorption model and adsorption kinetics.
Photocatalysis, photoinduced enhanced anti-bacterial functions and development of a selective m-tolyl hydrazine sensor based on mixed Ag·NiMn2O4 nanomaterials
Authors: Subhan Md Abdus , Chandra Saha Pallab , Hossain Md Anwar , Alam M. M. , Asiri Abdullah M. , Rahman Mohammed M. , Al-Mamun Mohammad , Rifat Tanjila Parvin , Raihan Topu , Azad A. K.
Published: August 2020

Photocatalytic dye degradation efficiency of Ag·NiMn2O4 at pH 4 was 91%; at pH 9, 77% and 95% in presence of H2O2 and at pH 7, 50%. Assembled Ag·NiMn2O4 nanomaterials/binder/GCE, as m-THyd sensor showed considerable sensitivity, DL, LDR, response time, reproducibility etc.
Reactions of triosmium and triruthenium clusters with 2-ethynylpyridine: new modes for alkyne C–C bond coupling and C–H bond activation
Authors: Joy Md. Tuhinur R. , Roknuzzaman  , Hossain Md. Emdad , Ghosh Shishir , Tocher Derek A. , Richmond Michael G. , Kabir Shariff E.
Published: August 2020

The reactivity of 2-ethynylpyridine at low-valent triosmium and triruthenium centers has been investigated.
Novel light-emitting clays with structural Tb3+ and Eu3+ for chromate anion detection
Authors: Marchesi Stefano , Bisio Chiara , Carniato Fabio
Published: August 2020

For the first time, Tb3+ and Eu3+ were incorporated into the framework of synthetic saponite by a one-pot hydrothermal procedure, obtaining luminescent materials with interesting photophysical properties, exploited for the fluorescent sensing of the chromate anion in water.
Curcumin loaded zinc oxide nanoparticles for activity-enhanced antibacterial and anticancer applications
Authors: Perera W. P. T. D. , Dissanayake Ranga K. , Ranatunga U. I. , Hettiarachchi N. M. , Perera K. D. C. , Unagolla Janitha M. , De Silva R. T. , Pahalagedara L. R.
Published: August 2020

Curcumin-loaded ZnO nanocomposites act as an effective, synergistically-enhanced combination delivery/therapeutic agent, holding promise for anticancer and antimicrobial therapy with reduced toxicities.
Synthesis of selenated isochromenones by AgNO3-catalyzed three-component reaction of alkynylaryl esters, selenium powder and ArB(OH)2
Authors: Jin Guo-Qing , Gao Wen-Xia , Zhou Yun-Bing , Liu Miao-Chang , Wu Hua-Yue
Published: August 2020

We reported AgNO3-catalyzed three-component reaction of alkynylaryl esters, selenium powder and ArB(OH)2, providing an efficient synthetic route to selenated isochromenones.
Structural impact of GTP binding on downstream KRAS signaling
Authors: Menyhárd Dóra K. , Pálfy Gyula , Orgován Zoltán , Vida István , Keserű György M. , Perczel András
Published: August 2020

Nucleotide exchange to the physiological, activated, GTP-bound form of KRAS results in the anchoring of Tyr32 within the active site.
Biosynthesis of the fungal glyceraldehyde-3-phosphate dehydrogenase inhibitor heptelidic acid and mechanism of self-resistance
Authors: Yan Yan , Zang Xin , Jamieson Cooper S. , Lin Hsiao-Ching , Houk K. N. , Zhou Jiahai , Tang Yi
Published: August 2020

The structural basis and self-resistance mechanism of fungal glyceraldehyde-3-phosphate dehydrogenase inhibitor heptelidic acid are uncovered.
Pattern formation in active model C with anchoring: bands, aster networks, and foams
Authors: Maryshev Ivan , Morozov Alexander , Goryachev Andrew B. , Marenduzzo Davide
Published: August 2020

We study a model for a microtubule-molecular motor mixture leading to rich pattern formation including aster networks, bands and foams.
Self-assembly behavior of experimentally realizable lobed patchy particles
Authors: Paul Sanjib , Vashisth Harish
Published: August 2020

We report on the self-assembly behavior of five different types of lobed patchy particles of different shapes (snowman, dumbbell, trigonal planar, square planar, and tetrahedral).
Time matters for macroscopic membranes formed by alginate and cationic β-sheet peptides
Authors: Yosefi Gal , Levi Topaz , Rapaport Hanna , Bitton Ronit
Published: August 2020

The peptide age and membrane geometry affect the micro- and nano-structure of hierarchically ordered planar and spherical membranes constructed at the interface of cationic β-sheet peptides and alginate solution.
Immobilizing single atom catalytic sites onto highly reduced carbon hosts: Fe–N4/CNT as a durable oxygen reduction catalyst for Na–air batteries
Authors: Noh Woo Yeong , Kim Eun Mi , Kim Kwang Young , Kim Jin Hyun , Jeong Hu Young , Sharma Pankaj , Lee Geunsik , Jang Ji-Wook , Joo Sang Hoon , Lee Jae Sung
Published: August 2020

Immobilizing metal ions on a carbon support usually involves severe aggregation (sintering) and loose attachment of metal ions owing to a weak metal–support interaction.
Tailoring the electronic structure by constructing the heterointerface of RuO2–NiO for overall water splitting with ultralow overpotential and extra-long lifetime
Authors: Zhang Gengwei , Wang Bin , Li Lu , Yang Sen , Liu Jiamei , Yang Shengchun
Published: August 2020

RuO2–NiO/NF, obtained through a dip-heating method, achieved continuous electrolysis for 2000 h at an ultrahigh current density. The RuO2–NiO interface promoted H2O dissociation and modulated chemisorbed O-containing intermediates, improving HER and OER activity.
Chemical prelithiation of Al for use as an ambient air compatible and polysulfide resistant anode for Li-ion/S batteries
Authors: Huang Yongmin , Liu Chang , Wei Fengyuan , Wang Gongwei , Xiao Li , Lu Juntao , Zhuang Lin
Published: August 2020

Ambient-air compatible and polysulfide resistant LiAl is prepared by chemical prelithiation and employed as an alternative anode for Li/S batteries.
A lanthanide coordination polymer as a ratiometric fluorescent probe for rapid and visual sensing of phosphate based on the target-triggered competitive effect
Authors: Han Lei , Liu Shi Gang , Yang Yu Zhu , Fan Yu Zhu , Zhou Jiao , Zhang Xing Yue , Li Nian Bing , Luo Hong Qun
Published: August 2020

A dual-ligand lanthanide coordination polymer is designed for ratiometric fluorescence and visual detection of Pi.
Semiconductor-to-metal reconstructive phase transition and superconductivity of anti-perovskite Ca3PN under hydrostatic pressure
Authors: Cheng Hao , Mao Ai-Jie , Yang Si-Min , Tian Hao , Jin Si-Yu , Yu Miao , Kuang Xiao-Yu
Published: August 2020

Two novel metal phases with superconductivity in anti-perovskite Ca3PN are captured via pressure-induced reconstructive phase transitions.
High growth rate and high wet etch resistance silicon nitride grown by low temperature plasma enhanced atomic layer deposition with a novel silylamine precursor
Authors: Kim Harrison Sejoon , Hwang Su Min , Meng Xin , Byun Young-Chul , Jung Yong Chan , Ravichandran Arul Vigneswar , Sahota Akshay , Kim Si Joon , Ahn Jinho , Lee Lance , Zhou Xiaobing , Hwang Byung Keun , Kim Jiyoung
Published: August 2020

Trisilylamine homolog, tris(disilanyl)amine (TDSA), is introduced as a novel precursor for the deposition of highly etch resistant silicon nitride thin films having a high growth rate at a low temperature (<300 °C) using plasma enhanced ALD process.
Investigating the thermoelectric performance of n-type SnSe: the synergistic effect of NbCl5 doping and dislocation engineering
Authors: Cai Jianfeng , Zhang Yan , Yin Yinong , Tan Xiaojian , Duan Sichen , Liu Guo-Qiang , Hu Haoyang , Xiao Yukun , Ge Zhenhua , Jiang Jun
Published: August 2020

NbCl5 doped SnSe0.95 to achieve carrier concentration adjustment and dislocation engineering in order to improve the ZT value.
The effect of thickness on the optoelectronic properties of organic field-effect transistors: towards molecular crystals at monolayer limit
Authors: Fan Yanwei , Liu Jie , Hu Wenping , Liu Yunqi , Jiang Lang
Published: August 2020

This manuscript reviews recent progress in the ultrathin monolayer molecular crystals (MMCs) for high performance optoelectronic devices.
Correction: Chlorine-doped SnO2 hydrophobic surfaces for large grain perovskite solar cells
Authors: Gong Wenxiao , Guo Heng , Zhang Haiyan , Yang Jian , Chen Haiyuan , Wang Liping , Hao Feng , Niu Xiaobin
Published: August 2020

Correction for ‘Chlorine-doped SnO2 hydrophobic surfaces for large grain perovskite solar cells’ by Wenxiao Gong et al., J. Mater. Chem. C, 2020, DOI: 10.1039/d0tc00515k.
Phonological Awareness Skills in Children With Early and Late Cochlear Implantation: Effects of Task and Phonological Unit
Authors: Lee Youngmee
Published: August 2020

Purpose

Phonological awareness (PA) skills are critical for spoken language acquisition and literacy. PA manifests in various skills that can be identified based on task performance and speech sound unit size. This study compared the PA skills of children with early cochlear implantation (E-CI), children with late cochlear implantation (L-CI), and children with typical hearing (TH) in relation to task and phonological unit. It also attempted to identify the significant predictors of PA skills in each CI and TH group.

Method

Twenty children with E-CI, 20 children with L-CI, and 20 children with TH participated in this study. PA skills were assessed using elision, blending, and segmenting tasks at both the syllabic and phonemic levels.

Results

The E-CI and L-CI groups performed significantly less well than the TH group on the elision and blending tasks at the syllabic level. However, the E-CI group performed at a similar level as the TH group in the segmenting tasks at both the syllabic and phonemic levels. The regression analysis identified age at implantation and receptive vocabulary scores as significant predictors of PA skills in children with CIs.

Conclusions

Although all the children with CIs had age-appropriate receptive vocabulary skills, the PA skills of both the E-CI and L-CI groups tended to lag behind those of the TH group in the elision and blending tasks at the syllabic level. Age at implantation and receptive vocabulary skills affected the development of PA skills in children with CIs.
Unifying low- and high-mass star formation through density-amplified hubs of filaments
Authors: Kumar M. S. N. , Palmeirim P. , Arzoumanian D. , Inutsuka S. I.
Published: August 2020

Context.Star formation takes place in giant molecular clouds, resulting in mass-segregated young stellar clusters composed of Sun-like stars, brown dwarfs, and massive O-type(50–100M⊙) stars.

Aims.We aim to identify candidate hub-filament systems (HFSs) in the Milky Way and examine their role in the formation of the highest mass stars and star clusters.

Methods.TheHerschelsurvey HiGAL has catalogued about 105clumps. Of these, approximately 35 000 targets are detected at the 3σlevel in a minimum of four bands. Using the DisPerSE algorithm we detect filamentary skeletons on 10′ × 10′ cut-outs of the SPIRE 250μm images (18′′ beam width) of the targets. Any filament with a total length of at least 55′′ (3 × 18′′) and at least 18′′ inside the clump was considered to form a junction at the clump. A hub is defined as a junction of three or more filaments. Column density maps were masked by the filament skeletons and averaged for HFS and non-HFS samples to compute the radial profile along the filaments into the clumps.

Results.Approximately 3700 (11%) are candidate HFSs, of which about 2150 (60%) are pre-stellar and 1400 (40%) are proto-stellar. The filaments constituting the HFSs have a mean length of ~10–20 pc, a mass of ~5 × 104M⊙, and line masses (M∕L) of ~2 × 103M⊙pc−1. All clumps withL> 104L⊙andL> 105L⊙at distances within 2 and 5 kpc respectively are located in the hubs of HFSs. The column densities of hubs are found to be enhanced by a factor of approximately two (pre-stellar sources) up to about ten (proto-stellar sources).

Conclusions.All high-mass stars preferentially form in the density-enhanced hubs of HFSs. This amplification can drive the observed longitudinal flows along filaments providing further mass accretion. Radiation pressure and feedback can escape into the inter-filamentary voids. We propose a “filaments to clusters” unified paradigm for star formation, with the following salient features: (a) low-intermediate-mass stars form slowly (106yr) in the filaments and massive stars form quickly (105yr) in the hub, (b) the initial mass function is the sum of stars continuously created in the HFS with all massive stars formed in the hub, (c) feedback dissipation and mass segregation arise naturally due to HFS properties, and explain the (d) age spreads within bound clusters and the formation of isolated OB associations.
A super-Earth and a sub-Neptune orbiting the bright, quiet M3 dwarf TOI-1266
Authors: Demory B.-O. , Pozuelos F. J. , Gómez Maqueo Chew Y. , Sabin L. , Petrucci R. , Schroffenegger U. , Grimm S. L. , Sestovic M. , Gillon M. , McCormac J. , Barkaoui K. , Benz W. , Bieryla A. , Bouchy F. , Burdanov A. , Collins K. A. , de Wit J. , Dressing C. D. , Garcia L. J. , Giacalone S. , Guerra P. , Haldemann J. , Heng K. , Jehin E. , Jofré E. , Kane S. R. , Lillo-Box J. , Maigné V. , Mordasini C. , Morris B. M. , Niraula P. , Queloz D. , Rackham B. V. , Savel A. B. , Soubkiou A. , Srdoc G. , Stassun K. G. , Triaud A. H. M. J. , Zambelli R. , Ricker G. , Latham D. W. , Seager S. , Winn J. N. , Jenkins J. M. , Calvario-Velásquez T. , Franco Herrera J. A. , Colorado E. , Cadena Zepeda E. O. , Figueroa L. , Watson A. M. , Lugo-Ibarra E. E. , Carigi L. , Guisa G. , Herrera J. , Sierra Díaz G. , Suárez J. C. , Barrado D. , Batalha N. M. , Benkhaldoun Z. , Chontos A. , Dai F. , Essack Z. , Ghachoui M. , Huang C. X. , Huber D. , Isaacson H. , Lissauer J. J. , Morales-Calderón M. , Robertson P. , Roy A. , Twicken J. D. , Vanderburg A. , Weiss L. M.
Published: August 2020

We report the discovery and characterisation of a super-Earth and a sub-Neptune transiting the bright (K = 8.8), quiet, and nearby (37 pc) M3V dwarf TOI-1266. We validate the planetary nature of TOI-1266 b and c using four sectors of TESS photometry and data from the newly-commissioned 1-m SAINT-EX telescope located in San Pedro Mártir (México). We also include additional ground-based follow-up photometry as well as high-resolution spectroscopy and high-angular imaging observations. The inner, larger planet has a radius of R = 2.37−0.12+0.16 R⊕ and an orbital period of 10.9 days. The outer, smaller planet has a radius of R = 1.56−0.13+0.15 R⊕ on an 18.8-day orbit. The data are found to be consistent with circular, co-planar and stable orbits that are weakly influenced by the 2:1 mean motion resonance. Our TTV analysis of the combined dataset enables model-independent constraints on the masses and eccentricities of the planets. We find planetary masses of Mp = 13.5−9.0+11.0 M⊕ (<36.8 M⊕ at 2-σ) for TOI-1266 b and 2.2−1.5+2.0 M⊕ (<5.7 M⊕ at 2-σ) for TOI-1266 c. We find small but non-zero orbital eccentricities of 0.09−0.05+0.06 (<0.21 at 2-σ) for TOI-1266 b and 0.04 ± 0.03 (< 0.10 at 2-σ) for TOI-1266 c. The equilibrium temperatures of both planets are of 413 ± 20 and 344 ± 16 K, respectively, assuming a null Bond albedo and uniform heat redistribution from the day-side to the night-side hemisphere. The host brightness and negligible activity combined with the planetary system architecture and favourable planet-to-star radii ratios makes TOI-1266 an exquisite system for a detailed characterisation.
Benchmark stars, benchmark spectrographs
Authors: Adibekyan V. , Sousa S. G. , Santos N. C. , Figueira P. , Allende Prieto C. , Delgado Mena E. , González Hernández J. I. , de Laverny P. , Recio–Blanco A. , Campante T. L. , Tsantaki M. , Hakobyan A. A. , Oshagh M. , Faria J. P. , Bergemann M. , Israelian G. , Boulet T.
Published: August 2020

Context. Gaiabenchmark stars are selected to be calibration stars for different spectroscopic surveys. Very high-quality and homogeneous spectroscopic data for these stars are therefore required. We collected ultrahigh-resolution ESPRESSO spectra for 30 of the 34Gaiabenchmark stars and made them public.

Aims.We quantify the consistency of the results that are obtained with different high- (R~ 115 000), and ultrahigh- (R~ 220 000) resolution spectrographs. We also comprehensively studied the effect of using different spectral reduction products of ESPRESSO on the final spectroscopic results.

Methods.We used ultrahigh- and high-resolution spectra obtained with the ESPRESSO, PEPSI, and HARPS spectrographs to measure spectral line characteristics (line depth; line width; and equivalent width, EW) and determined stellar parameters and abundances for a subset of 11Gaiabenchmark stars. We used the ARES code for automatic measurements of the spectral line parameters.

Results.Our measurements reveal that the same individual spectral lines measured from adjacent 2D (spectrum in the wavelength-order space) echelle orders of ESPRESSO spectra differ slightly in line depth and line width. When a long list of spectral lines is considered, the EW measurements based on the 2D and 1D (the final spectral product) ESPRESSO spectra agree very well. The EW spectral line measurements based on the ESPRESSO, PEPSI, and HARPS spectra also agree to within a few percent. However, we note that the lines appear deeper in the ESPRESSO spectra than in PEPSI and HARPS. The stellar parameters derived from each spectrograph by combining the several available spectra agree well overall.

Conclusions.We conclude that the ESPRESSO, PEPSI, and HARPS spectrographs can deliver spectroscopic results that are sufficiently consistent for most of the science cases in stellar spectroscopy. However, we found small but important differences in the performance of the three spectrographs that can be crucial for specific science cases.
A global model of particle acceleration at pulsar wind termination shocks
Authors: Cerutti Benoît , Giacinti Gwenael
Published: August 2020

Context. Pulsar wind nebulae are efficient particle accelerators, and yet the processes at work remain elusive. Self-generated, microturbulence is too weak in relativistic magnetized shocks to accelerate particles over a wide energy range, suggesting that the global dynamics of the nebula may be involved in the acceleration process instead.

Aims. In this work, we study the role played by the large-scale anisotropy of the transverse magnetic field profile on the shock dynamics.

Methods. We performed large two-dimensional particle-in-cell simulations for a wide range of upstream plasma magnetizations, from weakly magnetized to strongly magnetized pulsar winds.

Results. The magnetic field anisotropy leads to a dramatically different structure of the shock front and downstream flow. A large-scale velocity shear and current sheets form in the equatorial regions and at the poles, where they drive strong plasma turbulence via Kelvin-Helmholtz vortices and kinks. The mixing of current sheets in the downstream flow leads to efficient nonthermal particle acceleration. The power-law spectrum hardens with increasing magnetization, akin to those found in relativistic reconnection and kinetic turbulence studies. The high end of the spectrum is composed of particles surfing on the wake produced by elongated spearhead-shaped cavities forming at the shock front and piercing through the upstream flow. These particles are efficiently accelerated via the shear-flow acceleration mechanism near the Bohm limit.

Conclusions. Magnetized relativistic shocks are very efficient particle accelerators. Capturing the global dynamics of the downstream flow is crucial to understanding them, and therefore local plane parallel studies may not be appropriate for pulsar wind nebulae and possibly other astrophysical relativistic magnetized shocks. A natural outcome of such shocks is a variable and Doppler-boosted synchrotron emission at the high end of the spectrum originating from the shock-front cavities, reminiscent of the mysterious Crab Nebula gamma-ray flares.
Dynamics and an efficient malware detection system using opcode sequence graph generation and ml algorithm
Authors: Panduri Bharathi , Vummenthala Madhurika , Jonnalagadda Spoorthi , Ashwini Garwandha , Nagamani Naruvadi , Akhila Amanagati
Published: August 2020

IoT(Internet of things), for the most part, comprises of the various scope of Internet-associated gadgets and hubs. In the context of military and defence systems (called as IoBT) these gadgets could be personnel wearable battle outfits, tracking devices, cameras, clinical gadgets etc., The integrity and safety of these devices are critical in mission success and it is of utmost importance to keep them secure. One of the typical ways of the attack on these gadgets is through the use of malware, whose aim could be to compromise the device and or breach the communications. Generally, these IoBT gadgets and hubs are a much more significant target for cyber criminals due to the value they pose, more so than IoT devices. In this paper we attempt at creating a significant learning based procedure to distinguish, classify and tracksuch malware in IoBT(Internet of battlefield things) through operational codes progression. This is achieved by transforming the aforementioned OpCodes into a vector space, upon which a Deep Eigen space learning technique is applied to differentiate between harmful and safe applications. For robust classification, Support vector machine and n gram Sequencing algorithms are proposed in this paper. Moreover, we evaluate the quality of our proposed approach in malware recognition and also its maintainability against garbage code injection assault. These results are presented on a web page which has separate components and levels of accessibility for user and admin credentials. For the purpose of tracking the prevalence of various malwares on the network, counts and against garbage code injection assault. These results are presented on a web page which has separate components and levels of accessibility for user and admin credentials. For the purpose of tracking the prevalence of various malwares on the network, counts and trends of different malicious opcodes are displayed for both user and admin. Thereby our proposed approach will be beneficial for the users, especially for those who want to communicate confidential information within the network. It is also beneficial if a user wants to know whether a message is secure or not. This has also been made malware test accessible, which ideally will profit future research endeavors.
Optimization of Metal Inert Gas Welding Process during Joining of Structural Steels- An Overview
Authors: Misra Ravindra Kumar , Porwal Rajesh Kumar
Published: August 2020

Metal Inert Gas welding is a fast, reliable and cost effective technique for joining of different ferrous materials and steels used in the construction of large structures like Fe410WA, IS2062, SS304, AISI1040 and AISI316 etc. To obtain better quality and performance of the steel welded joints, parameter optimisation of metal inert gas welding procedure and weld heat treatment process is carried out. In optimization work and studies, variables of GMAW process like welding voltage and current, speed of welding, WFR (rate of wire feed), GFR (rate of gas flow), type of gas used and effect of heat treatments are kept changing to get best combinations of input parameters for best quality of welded parts. The quality of welds is evaluated in terms of mechanical properties of welded joints like ultimate tensile and yield strength, elongation, microstructure, heat affected zone and defect free weld joints etc. Model and experimental studies are done in different combinations to get best combination of input parameters for steels. Studies by authors have identified the significance of input parameters in ascending order and some of them also quantified the optimal values of the input parameters. Pre and post weld heat treatment of structures is beneficial in improvement of mechanical and fatigue properties.
A comprehensive study to select suitable method to enhance mechanical properties during 3D printing of metallic materials
Authors: Chandra Utkarshika , Porwal Rajesh
Published: August 2020

Metallic metals are governed by their mechanical properties. Ductility and Strength two most significant properties behave as two opposite poles while metal is manufactured by conventional methods. Additive manufacturing however acts as a bridge binding two into more of a proportional relationship. Additive manufacturing commonly referred as 3D Printing reduces the tact time along with high dimensional accuracies hence it has turned out to be the most researched technologies in the recent times. Out of several 3D Printing methods Selective laser melting and Electron beam melting prove more efficient in increasing the strength along with ductility by significantly altering the grain structure thus creating an array of properties which are different from their contemporaries. The paper deals with the effects of the two processes along with the challenges faced due to the defects risen during the processing in order to optimally decide the process to be taken up for a selected metallic metal
FEM Analysis of Robotized Arc Welded Joint
Authors: Islam Anas , Dwivedi Vijay , Sharma Kamal
Published: August 2020

Welding is one of the most important phenomenon as far as the joining of two bodies are concerned. Welding processes are common in fabrication industries. Different types of welding are used in the automobile industries for the manufacturing of their bodies. Other examples of industries where welding plays a crucial role include construction industries, aviation industries, fabrication of pipelines, general repairing of machines, etc. As welding is such a most important factor in almost all industries, therefore it deserves proper attention in order to optimize the whole welding process. On one hand welding process is quite beneficial but on the other hand, it requires very careful attention of the operator, as there were several cases of accident due to welding just because of the carelessness of the operator. Also, it is a repetitive task so the labor or worker is engaged in working without proper use of their brains and in some other productive works. Thus, a number of manpower is only engaged for welding operation this makes the work boring and this restricts them from showing their true potential. This paper deals with the finite element analysis (FEA) of welded single V joint for obtaining the Shear Elastic Strain, Normal Elastic strain, Strain energy, and Shear stress respectively developed at the welded joint. The temperature of the weld pool taken for analysis is 400°C and the material of the specimen is Mild steel ASTM A 36 for welding and its coordinating filler material AWS A5.1 E 6013 were chosen in this study. The specimen size was 30×150×9mm3 thickness. Welding current was set to 90A with welding speed27mm/sec.
A Review on Mechanical and Thermal Properties of Aluminum Metal Matrix Composites
Authors: Sunil Kumar Reddy K. , Kannan M. , Karthikeyan R. , Prashanth S. , Rohith Reddy B.
Published: August 2020

The Aluminum Metal Matrix Composites (AMMCs) have been becoming suitable materials for many devices in the application of various fields like heavy equipment’s industry, automobile, aeronautics and etc. because of its excellent physical and structural characteristics. The research on AMMC dealt the effect of reinforcement such as fly-ash, SiC, Al2O3, Graphite, B4C, Cubic Boron Nitride (CBN) on aluminium in different percentages. Every reinforcement has its own characteristics that enhance the base aluminium characteristics when added. By adding these types of reinforcement to metal base led to enhance the properties like wear resistance, stiffness, creep, tensile strength, fatigue, toughness, thermal conductivity, hardness in comparison with traditional approach on materials engineering. This review paper was aimed to give the detailed information about the impact of various reinforcements incorporated in matrix by illustrating its benefits and drawbacks. This extensive survey on AMMC could be useful to develop farther.
Optimizing Tool Path Sequence Of Plasma Cutting Machine Using TSP Approach
Authors: Sonawane Shreeyash , Patil Pallavi , Bharsakade Ramkrishna , Gaigole Pankaj
Published: August 2020

The paper consists of optimizing the total distance traveled by the Plasma Cutting Tool Head. It is cross-functional implementation traveling salesman problem to the core manufacturing process of plasma cutting. This study contributes to reduce the total rapid traverse length (Total Through-Air Travelled Distance) by the cutting tool (Plasma Beam), which is totally a non-productive as well as non-value adding process contributing to the machine running costs and cycle time of the product directly and indirectly. For deriving this optimal sequence for the plasma cutting head, a heuristic algorithm is used. This algorithm calculates an optimal solution for a problem creating the best possible sequence. The greedy algorithm follows the problem-solving heuristics of making a locally optimal choice at every stage, finally integrating a globally optimal solution. Hence after deducing this optimal sequence and when accompanied by the Plasma Cutting tool, it resulted in the least distance traveled, contributing to minimizing cost and energy savings of the machine and simultaneously reducing the total traveled distance and similarly the cycle time.
Design of TID controller based on firefly algorithm for controlling the speed of a D.C. Motor
Authors: Rajput Govind Kumar , Yadav Adesh , Kumar Ajay , Gautam Abhishek , Tiwari Anand , Babu Naladi Ram , Chiranjeevi Tirumalasetty
Published: August 2020

Implementation of tilt integral derivative (TID) controller for controlling the speed of a D.C. Motor using meta heuristic nature inspired algorithm named by firefly algorithm (FA) is proposed in this paper. By using FA based optimization technique, we have tuned TID controller parameters. Further, comparative analysis has been done with FA based conventional PID and fractional order PID (FOPID) controllers. The performance of TID is investigated in terms of various performance indices like integral of square error (ISE), integral of time-weighted absolute error (ITAE), integral of absolute error (IAE) and integral of time-weighted square error (ITSE). Investigation carried out reveals the advantage of TID over conventional PID and FOPID in terms of reduced settling time and performance indices.
Performance Investigation of Grid-Connected DFIG using Integrated Shunt Active Filtering Capabilities
Authors: Patel Krishna S. , Makwana Vijay H.
Published: August 2020

This paper presents the modified grid side converter control (GSC) technique which enable the GSC to work as a shunt active filter to mitigate the grid current harmonics produced by the nonlinear load, as well as to transfer power from the grid to the rotor of doubly fed induction generator (DFIG) or vice versa. The main contribution of this proposed technique is an addition of a shunt active filter with space vector pulse width modulation (SVPWM) controller in GSC control itself in order to achieve a better grid current %THD profile, and simultaneously to control active power for variable wind speed. The reactive power supply to the DFIG and extraction of maximum power is achieved using RSC. The comparison of the modified GSC control technique using hysteresis current control (HCC), and SVPWM controller used to mitigate the harmonics is presented with different wind speeds. The proposed modified GSC control technique is simulated for grid-connected 2.6 MW DFIG based wind energy conversion system (WECS) in MATLAB Simulink environment.
Sustainability aspects in the warm forming of tailor welded blanks
Authors: Satya Suresh V.V.N. , Suresh A. , Regalla S.P , Ramana P.V , Vamshikrishna O.
Published: August 2020

Tailor welded blank (TWB) technology has been used in the manufacture of automobile body-in-white components since a long time. These components consist of different materials/thicknesses. Researchers and manufacturers involved with production of warm formed TWB components failed to address the sustainable issues related to warm forming. Rather they concentrated more on reducing the weld line movement (WLM). The WLM if not arrested shall lead to fracture, due to wrinkles, produced during forming. In this paper, the sustainability aspects involved in the warm forming of TWB were discussed with respect to energy and material savings. The results show a reduction of about 50% punch load in a hydraulic press during deep drawing under warm forming conditions. This paper addresses the questions related to the implications of thickness ratio on the weld line movement and further shows how material savings of nearly 33% has been obtained. It also discusses about the carbon emissions during manufacturing of raw materials and the recycling benefits of stainless steel, so as to minimize emissions at the production stage itself during raw materials production.
A Review on Intelligent Fault Detection in Rolling Element Bearings
Authors: Balraj Robin Raj , Barla Madhavi , Tingarikar Govardhan
Published: August 2020

Rolling element bearings play vital role in the working of rotating hardware or machine. The imperfection-initiated vibration signal estimation and its examination is frequently utilized in deficiency recognition of direction. The crude sign is mind boggling in nature to dissect for deformity highlights, Therefore the sign be prepared to break down it. This article presents different sign handling procedures including canny strategies, for example, Artificial Techniques, Machine learning techniques and so on. The suitability of these strategies, all things considered, depends on the idea of features isolated from the bearing signs. The writing containing procedures utilized by different analysts have been managed in this review. This review may fill in as a kind of perspective for the scientists to go over different strategies in bearing diagnostics.
A Survey on a Nonlinear Regression Application to Machine Learning Techniques for Geomagnetic Data Reconstruction Processing
Authors: Komala Chimata , Butchi Raju Dr.K
Published: August 2020

The genuineness of geomagnetic written record is a vital issue trig understanding formative methodology of Earth’s appealing field, because it provides necessary data thru move toward surface examination, unexploded insecure weapons area, therefore on. Expected thru recreate under examined geomagnetic dossier, this paper presents a geomagnetic dossier propagation approach considering AI frameworks. Ordinary direct contribution approaches are slanted thru time unskillfulness & high work price, whereas planned approach has an associate huge improvement. Trig this paper, three extraordinary machine learning models, support vector machine, random forests, and gradient boosting were collected. Besides, a significant learning replicas were used thru show an interminable backslide hyperplane commencing an arrangement dossier. Showed backslide hyperplane is a mapping of association between phony up missing dossier & incorporating impeccable dossier. Commencing a certain point, readied replicas, essentially hyperplanes, were used thru imitate missing geomagnetic follows considering endorsement, & they canister endure used considering replicating additionally accumulated new field dossier
A review on Mechanism of fluid flow and Transfer of Heat in Closed Loop Pulsating Heat Pipe
Authors: Javvadi Venkata Suresh , Panitapu Bhramara , Gangam Rajith , Kulkarni Hrishikesh
Published: August 2020

Now-a-days the researchers and people are moving towards such an innovation which meet the needs of the present without compromising the ability of future generations to meet their own needs. In such innovations Pulsating heat pipe is one of the technology which started in 1990 by Akachi. Pulsating heat pipe is a heat transfer device which has an effective heat transfer capability. The researchers had done many experimental and theoretical investigations, but they haven’t got the complete knowledge about it because of its complex operational mechanism which consists of hydrodynamic and thermodynamic coupling effect. This paper gives a brief idea on the thermo-hydro dynamic characteristics of this device. The brief idea will be on internal diameter, cross-section of the tube and the amount of working fluid in system. In addition to all these the number of turns in device and thermo-physical properties of working fluid which leads to determine the thermal behavior. The motto of this paper is to make review paper on recent past years on papers which used refrigerants as working fluids and its fluid flow mechanism and finally lead upcoming researchers to have basic idea and future scope of device.
DSP based Voltage Source Inverter for an application of Induction Motor control
Authors: Mangali Venu Gopal , P Shravan Kumar , Awaar Vinay Kumar , Jugge Praveen
Published: August 2020

The paper presents a Single-phase inverter configuration dependent on IGBTs utilizing a Digital Signal Processor by the SPWM method. The equipment configuration is actualized utilizing IGBT Inverter Module. The equipment results are examined in the paper. The IGBT, which requires 15v of activating pulse to their individual gates, is taken care of through the isolation circuit. The circuit is intended to enhance the pulse from the DSP controller, up to the necessary abundancy, and goes about as an isolation circuit. The inverter input is given through the DC rectifier circuit with consistent voltage, and the output is Controllable AC with variable voltage and frequency.
Experimental investigation in machining EN18 using coated tool under dry and MQL condition
Authors: Satynarayana Kosaraju , Rajkiran Kumkuma , Sai Kiran Kalemula
Published: August 2020

EN 18 is one of the versatile metal that exists its presences in all the industrial, transportation and building equipment’s. Machining of these material is done on large scale and consumes a whole lot of lubrication unit. Present paper discuss regarding the usage and substitutional to flood coolant systems by minimum quality lubrication ((MQL) systems for economical friendly green machining operation. Using three-factor parameters speed (50, 75, 100 m/min), feed (0.05, 0.1, 0.15 mm/rev) and depth of cut (0.4, 0.8, 1.2 mm) are varied and turned on the EN 18 steel. The experimental outcomes of surface roughness is discussed with comparison with dry machining and ST-CUT 54 MQL machining. It was observed that with MQL turning the roughness produce better compared to dry machining. The optimum condition was found to be cutting speed at 100m/min, feed at 0.05mm/rev and depth of cut at 0.4mm. The outcomes are useful for improved machining industrial practices.
CODE2VEC Based Cognitive Agent System to Retrieve Relevant Code Component from Repository
Authors: Talari Meghna , N Krishna Chythanya , Reddy C.R.K
Published: August 2020

The cognitive agent system helps to retrieve most relevant code component by introducing latest techniques. In this paper the authors used latest approach of code embedding which undergoes code2vec tokenization model by tokenizing and converting the code components present in the dataset into a numeric representation to create a input for neural network environment and also implemented cosine similarity matching technique to acquire the relevancy and perform retrieval of code component.
A Role of cryogenic in Wire cut EDM process
Authors: Satynarayana Kosaraju , Rajkiran Kumkuma , Anil kumar Pujari , Chakradhar D
Published: August 2020

Novel techniques are being focused on the enrichment of the performance characteristics under different machining processes. Cryogenic is one of such novel practices that tunes the surface integrity with vast variations with the traditional machining processes. Dimensional accuracy, surface roughness, material removal rate with less reduction in scrap of material is one of the prior targets of production process. Wire cut Electro Discharge Machining (WEDM) is one method that satisfy with upgrading performance characteristics. In order to step-up these performance characteristics in attaining superior quality, cryogenics practices have collaborated with the WEDM process. Present paper deals with the reviews of the researchers that have been performed over cryogenic treated WEDM process. Effect of performance characteristics like pulse on, pulse off, current, voltage, wire tension, wire feed is discussed with relation to material removal rate, tool wear rate and surface roughness evolved. Key concept of paper is to include the research ideology with best feasible techniques that can prevail in production practice in order of contribute to the forthcoming researches in industrial and production departments.
An Effective Solution to Single-Area Dynamic Dispatch Using Improved Chimp Optimizer
Authors: Kumari Ch. Leela , Kamboj Vikram Kumar
Published: August 2020

This paper proposes the Improved Chimp Algorithm (ICHIMP) to solve single area dynamic economic load dispatch (ELD) problem of electric power system. Chimp is a biologically-stimulated heuristic optimization technique, which is embedded on impersonating the technique chimps hunt for food and remain existent by escaping from their adversary. The particularity of ICHIMP is that the chimps move in group for hunting but each chimp searches the prey independently. The single area dynamic dispatch problem is described as non-linear, complex and forced optimization problem with objective function to curtail the total generation price, whereas fulfilling the correspondence and dissimilarity constraints of the system. This proposed algorithm has been tested on five different test systems consisting of 3, 6, 13, 20 and 40- generating units.. The test results of ICHIMP determine its superiority over other existing algorithms addressed in literature and show that it outperforms for Single area dynamic dispatch problem of electric power system.
A Review on Geopolymer RCC Beams made with Recycled Coarse Aggregate
Authors: Srinivas. T , Abhignya. G , Ramana Rao. N.V
Published: August 2020

In present day scenario, concrete construction is rapidly increasing for different uses and aspects irrespective of the economy and its usage. Due to this imbalanced usage of economy, scarcity of raw materials increasing day by day and environment is getting affected due to manufacturing of cement. This study has been done how to reduce environmental pollution by using different kind of bi product materials in replacement to conventional concrete, which is made up of OPC. The cement can be replaced with fly ash; GGBS, rice husk ash etc, aggregates are being partially replaced with recycled aggregates which come from demolished structures and alkaline liquids such as sodium silicates and sodium hydroxide can be used in concrete, which is called geopolymer concrete. Literature review has been carried out to find the optimum content of aggregates to be replaced and the flexure behavior of the beams is being evaluated. From the literature study, it has been identified that the optimum compressive strength is achieved at 30% replacement of recycled aggregate and ductility natures of both Geopolymer and conventional concrete beams are almost similar.
Comparison of Seismic isolation with isolator and Soil structure Interaction U-shaped metallic isolator and Soil structure Interaction
Authors: Sravya G. Jyothi , Manchalwar A.
Published: August 2020

Soil condition is an important research area in earthquake engineering. In this work we evaluated the impact of soil-structure interaction (SSI) and U-shaped steel damper on the isolated response of the building base. Different soils for a seismic performance of multistory buildings are systematically compared and discussed. The soil’s physical state is divided into; hard soil, medium soil, and soft soil. It was compared with the U-shaped steel damper and there is noticeable difference between them. This study concludes that the use of steel damper shaped and SSI has been effective in minimizing structural response. It was observed that interaction of the soil structure provides some flexibility to the structure by increasing the structure’s displacements. Modeling base isolation along with consideration of soil structure interaction therefore leads to better structural response prediction.
Prediction of strength and durability properties of HPC composites using Adaptive Neuro-fuzzy Inference System
Authors: Magudeaswaran. P , Kumar C. Vivek , Ravinder Rathod
Published: August 2020

High-Performance Concrete (HPC) is a high-quality concrete that requires special conformity and performance requirements. The objective of this study was to investigate the possibilities of adapting neural expert systems like Adaptive Neuro-Fuzzy Inference System (ANFIS) in the development of a simulator and intelligent system and to predict durability and strength of HPC composites. These soft computing methods emulate the decision-making ability of human expert benefits both the construction industry and the research community. These new methods, if properly utilized, have the potential to increase speed, service life, efficiency, consistency, minimizes errors, saves time and cost which would otherwise be squandered using the conventional approaches.