bluuebunny/crossref_metadata_2025 huggingface dataset:
Speech-in-noise detection is related to auditory working memory precision for frequency
Authors: Lad Meher , Holmes Emma , Chu Agatha , Griffiths Timothy D.
Published: August 2020

Speech-in-noise (SiN) perception is a critical aspect of natural listening, deficits in which are a major contributor to the hearing handicap in cochlear hearing loss. Studies suggest that SiN perception correlates with cognitive skills, particularly phonological working memory: the ability to hold and manipulate phonemes or words in mind. We consider here the idea that SiN perception is linked to a more general ability to hold sound objects in mind, auditory working memory, irrespective of whether the objects are speech sounds. This process might help combine foreground elements, like speech, over seconds to aid their separation from the background of an auditory scene. We investigated the relationship between auditory working memory precision and SiN thresholds in listeners with normal hearing. We used a novel paradigm that tests auditory working memory for non-speech sounds that vary in frequency and amplitude modulation (AM) rate. The paradigm yields measures of precision in frequency and AM domains, based on the distribution of participants’ estimates of the target. Across participants, frequency precision correlated significantly with SiN thresholds. Frequency precision also correlated with the number of years of musical training. Measures of phonological working memory did not correlate with SiN detection ability. Our results demonstrate a specific relationship between working memory for frequency and SiN. We suggest that working memory for frequency facilitates the identification and tracking of foreground objects like speech during natural listening. Working memory performance for frequency also correlated with years of musical instrument experience suggesting that the former is potentially modifiable.
Correlated clusters of closed reaction centers during induction of intact cells of photosynthetic bacteria
Authors: Maróti Péter , Kovács István A. , Kis Mariann , Smart James L. , Iglói Ferenc
Published: August 2020

Antenna systems serve to absorb light and to transmit excitation energy to the reaction center (RC) in photosynthetic organisms. As the emitted (bacterio)chlorophyll fluorescence competes with the photochemical utilization of the excitation, the measured fluorescence yield is informed by the migration of the excitation in the antenna. In this work, the fluorescence yield concomitant with the oxidized dimer (P+) of the RC were measured during light excitation (induction) and relaxation (in the dark) for whole cells of photosynthetic bacterium Rhodobacter sphaeroides lacking cytochrome c2 as natural electron donor to P+ (mutant cycA). The relationship between the fluorescence yield and P+ (fraction of closed RC) showed deviations from the standard Joliot–Lavergne–Trissl model: (1) the hyperbola is not symmetric and (2) exhibits hysteresis. These phenomena originate from the difference between the delays of fluorescence relative to P+ kinetics during induction and relaxation, and in structural terms from the non-random distribution of the closed RCs during induction. The experimental findings are supported by Monte Carlo simulations and by results from statistical physics based on random walk approximations of the excitation in the antenna. The applied mathematical treatment demonstrates the generalization of the standard theory and sets the stage for a more adequate description of the long-debated kinetics of fluorescence and of the delicate control and balance between efficient light harvest and photoprotection in photosynthetic organisms.
Sublingual indocyanine green films for non-invasive swallowing assessment and inflammation detection through NIR/SWIR optical imaging
Authors: Beringhs André O’Reilly , Singh Surya Pratap , Valdez Tulio Alberto , Lu Xiuling
Published: August 2020

Indocyanine green (ICG) is the most commonly used FDA-approved agent for clinical optical imaging, administered through injections only, due to its poor membrane permeability. Although ICG has vast potential for non-invasive non-radioactive imaging in patients, the clinical applications are limited by the invasive administration and short half-life in blood circulation. To expand the clinical value of ICG, non-toxic chitosan-based ICG-loaded films were designed for sublingual administration for near-infrared (NIR) and short-wave infrared (SWIR) optical imaging. Two film formulations were developed with different ICG release rates. Mold-casted self-emulsifying films rapidly released ICG (80% in 4 h) in the form of nanosized droplets, which were mostly swallowed and produced significant contrast of upper digestive tract to enable in vivo swallowing evaluations using NIR/SWIR imaging. Regular films released ICG slowly (80% in 25 h), allowing for steady absorption of ICG to systemic circulation. Inflammation in mouse feet was detected within 30 min after sublingual administration with a 1.43-fold fluorescence increase within 1 h at the inflammation sites, comparable to a 1.76-fold increase through intravenous injection. Administering ICG using sublingual films displayed notable potential for non-invasive diagnosis and monitoring of inflammatory conditions and swallowing disorders, addressing a current need for alternatives to ICG parenteral administration.
International electronic health record-derived COVID-19 clinical course profiles: the 4CE consortium
Authors: Brat Gabriel A. , Weber Griffin M. , Gehlenborg Nils , Avillach Paul , Palmer Nathan P. , Chiovato Luca , Cimino James , Waitman Lemuel R. , Omenn Gilbert S. , Malovini Alberto , Moore Jason H. , Beaulieu-Jones Brett K. , Tibollo Valentina , Murphy Shawn N. , Yi Sehi L’ , Keller Mark S. , Bellazzi Riccardo , Hanauer David A. , Serret-Larmande Arnaud , Gutierrez-Sacristan Alba , Holmes John J. , Bell Douglas S. , Mandl Kenneth D. , Follett Robert W. , Klann Jeffrey G. , Murad Douglas A. , Scudeller Luigia , Bucalo Mauro , Kirchoff Katie , Craig Jean , Obeid Jihad , Jouhet Vianney , Griffier Romain , Cossin Sebastien , Moal Bertrand , Patel Lav P. , Bellasi Antonio , Prokosch Hans U. , Kraska Detlef , Sliz Piotr , Tan Amelia L. M. , Ngiam Kee Yuan , Zambelli Alberto , Mowery Danielle L. , Schiver Emily , Devkota Batsal , Bradford Robert L. , Daniar Mohamad , Daniel Christel , Benoit Vincent , Bey Romain , Paris Nicolas , Serre Patricia , Orlova Nina , Dubiel Julien , Hilka Martin , Jannot Anne Sophie , Breant Stephane , Leblanc Judith , Griffon Nicolas , Burgun Anita , Bernaux Melodie , Sandrin Arnaud , Salamanca Elisa , Cormont Sylvie , Ganslandt Thomas , Gradinger Tobias , Champ Julien , Boeker Martin , Martel Patricia , Esteve Loic , Gramfort Alexandre , Grisel Olivier , Leprovost Damien , Moreau Thomas , Varoquaux Gael , Vie Jill-Jênn , Wassermann Demian , Mensch Arthur , Caucheteux Charlotte , Haverkamp Christian , Lemaitre Guillaume , Bosari Silvano , Krantz Ian D. , South Andrew , Cai Tianxi , Kohane Isaac S.
Published: August 2020

We leveraged the largely untapped resource of electronic health record data to address critical clinical and epidemiological questions about Coronavirus Disease 2019 (COVID-19). To do this, we formed an international consortium (4CE) of 96 hospitals across five countries (www.covidclinical.net). Contributors utilized the Informatics for Integrating Biology and the Bedside (i2b2) or Observational Medical Outcomes Partnership (OMOP) platforms to map to a common data model. The group focused on temporal changes in key laboratory test values. Harmonized data were analyzed locally and converted to a shared aggregate form for rapid analysis and visualization of regional differences and global commonalities. Data covered 27,584 COVID-19 cases with 187,802 laboratory tests. Case counts and laboratory trajectories were concordant with existing literature. Laboratory tests at the time of diagnosis showed hospital-level differences equivalent to country-level variation across the consortium partners. Despite the limitations of decentralized data generation, we established a framework to capture the trajectory of COVID-19 disease in patients and their response to interventions.
Structural studies reveal flexible roof of active site responsible for ω-transaminase CrmG overcoming by-product inhibition
Authors: Xu Jinxin , Tang Xiaowen , Zhu Yiguang , Yu Zhijun , Su Kai , Zhang Yulong , Dong Yan , Zhu Weiming , Zhang Changsheng , Wu Ruibo , Liu Jinsong
Published: August 2020

Amine compounds biosynthesis using ω-transaminases has received considerable attention in the pharmaceutical industry. However, the application of ω-transaminases was hampered by the fundamental challenge of severe by-product inhibition. Here, we report that ω-transaminase CrmG from Actinoalloteichus cyanogriseus WH1-2216-6 is insensitive to inhibition from by-product α-ketoglutarate or pyruvate. Combined with structural and QM/MM studies, we establish the detailed catalytic mechanism for CrmG. Our structural and biochemical studies reveal that the roof of the active site in PMP-bound CrmG is flexible, which will facilitate the PMP or by-product to dissociate from PMP-bound CrmG. Our results also show that amino acceptor caerulomycin M (CRM M), but not α-ketoglutarate or pyruvate, can form strong interactions with the roof of the active site in PMP-bound CrmG. Based on our results, we propose that the flexible roof of the active site in PMP-bound CrmG may facilitate CrmG to overcome inhibition from the by-product.
Long-term dry storage of enzyme-based reagents for isothermal nucleic acid amplification in a porous matrix for use in point-of-care diagnostic devices
Authors: Kumar Sujatha , Gallagher Ryan , Bishop Josh , Kline Enos , Buser Joshua , Lafleur Lisa , Shah Kamal , Lutz Barry , Yager Paul
Published: August 2020

Long-term dry storage of enzyme-based isothermal amplification reagents in glass fiber porous matrix for use in point-of-care devices.
Voltammetric pH sensor based on electrochemically modified pseudo-graphite
Authors: Zhu Haoyu , Hassan Tanim , Kabir Humayun , May Jeremy , Hamal Kailash , Lopez Ricardo , Smith Hailey J. , Nicholas Nolan W. , Sankaran Prasanna , McIlroy David N. , Cheng I. Francis
Published: August 2020

A nanocrystalline graphite-like amorphous carbon (graphite from the University of Idaho thermolyzed asphalt reaction, GUITAR) is electrochemically modified for voltammetric pH sensing. This electrode has a pH sensing range from 0 to 11.
Sub-stoichiometric inhibition of IAPP aggregation: a peptidomimetic approach to anti-amyloid agents
Authors: Maity Debabrata , Kumar Sunil , AlHussein Ruyof , Gremer Lothar , Howarth Madeline , Karpauskaite Laura , Hoyer Wolfgang , Magzoub Mazin , Hamilton Andrew D.
Published: August 2020

Naphthalimide-appended oligopyridylamide peptidomimetic modulate islet amyloid polypeptide amyloidogenesis and disaggregate preformed oligomers and fibrils into non-toxic conformations at substoichiometric concentration.
Cancer cell death using metabolic glycan labelling techniques
Authors: Park Sang-Hyun , Jung Hyoje , Lee Hosoowi , Kim Tae Min , Cho Jin Won , Jang Woo-Dong , Hyun Ji Young , Shin Injae
Published: August 2020

We report a method for selectively inducing cancer cell death that utilizes metabolic glycan labelling combined with ADCC or PDT.
One-step synthesis of IrOx-decorated ultrathin NiFe LDH nanosheets for efficient oxygen evolution reaction
Authors: Liu Depei , Du Yu , Li Taozhu , Zhang Hehe , Liu Duanduan , Zhang Weining , Tang Huang , Hou Yanghui , Li Jingsha , Yan Shicheng , Yu Tao , Zou Zhigang
Published: August 2020

IrOx decoration promotes intrinsic OER activity of NiFe LDH by increasing active site and electric conductivity.
Correction: A tropylium annulated N-heterocyclic carbene
Authors: Appel Sebastian , Brüggemann Peter , Ganter Christian
Published: August 2020

Correction for ‘A tropylium annulated N-heterocyclic carbene’ by Sebastian Appel et al., Chem. Commun., 2020, 56, 9020–9023, DOI: 10.1039/D0CC04482B.
Phase transformation of PiMoCo and their electrocatalytic activity for oxygen evolution reaction
Authors: Cheng Mengsi , Wang Hongzhi , Liu Huichao , Yu Jiali , Cong Guangtao , Hu Chunyan , Huang Yankun , Zhang Jiatao , Ji Muwei , Zhu Caizhen , Xu Jian
Published: August 2020

Electrocatalysis caused by the crystallinity of catalysts is viewed as a key role of the electrocatalytic activity, but there are a few reports on it.
Dopant site in indium-doped SrTiO3 photocatalysts
Authors: Sudrajat Hanggara , Fadlallah Mohamed M. , Tao Shuxia , Kitta Mitsunori , Ichikuni Nobuyuki , Onishi Hiroshi
Published: August 2020

Occupation site of In guest dopant in SrTiO3 host lattice is successfully revealed and comprehensively studied with combined experimental and theoretical methods.
A swarm intelligence modeling approach reveals noble gas cluster configurations confined within carbon nanotubes
Authors: Owais Cheriyacheruvakkara , John Chris , Swathi Rotti Srinivasamurthy
Published: August 2020

A swarm intelligence modeling approach together with the continuum approximation for carbon nanotubes unravels confinement effects for noble gas clusters.
Where silylene–silicon centres matter in the activation of small molecules
Authors: Shan Changkai , Yao Shenglai , Driess Matthias
Published: August 2020

Small molecules such as H2, N2, CO, NH3, O2 are ubiquitous stable species and their activation and role in the formation of value-added products are of fundamental importance in nature and industry.
A theoretical study of the reactivity of ethene and benzophenone with a hyper-coordinated alkene containing a so-called E=E (E = C, Si, Ge, Sn, and Pb) unit
Authors: Yang Ming-Chung , Su Ming-Der
Published: August 2020

The reactivity of a reported hyper-coordinated alkene (Rea-E; Rea = reactant; E = group 14 element) featuring a central E=E moiety was theoretically analyzed using sophisticated theoretical methods.
Graphene-PSS/l-DOPA nanocomposite cation exchange membranes for electrodialysis desalination
Authors: Alabi Adetunji , Cseri Levente , Al Hajaj Ahmed , Szekely Gyorgy , Budd Peter , Zou Linda
Published: August 2020

This research reports the fabrication of nanocomposite cation exchange membranes by incorporating negatively charged graphene-based nanomaterials into a non-charged poly(vinylidene fluoride) matrix using a mold-casting technique developed in-house.
Design of polymer-free Vitamin-A acetate/cyclodextrin nanofibrous webs: antioxidant and fast-dissolving properties
Authors: Celebioglu Asli , Uyar Tamer
Published: August 2020

Polymer-free inclusion complex nanofibers of Vitamin-A acetate/cyclodextrin were prepared having fast-dissolving and enhanced antioxidant properties for the purpose of new-generation food/dietary supplement systems.
In situ plasma-assisted synthesis of polydopamine-functionalized gold nanoparticles for biomedical applications
Authors: Nguyen Linh Nhat , Kaushik Neha , Lamichhane Pradeep , Mumtaz Sohail , Paneru Ramhari , Bhartiya Pradeep , Kwon Jae Sung , Mishra Yogendra Kumar , Nguyen Liem Quang , Kaushik Nagendra Kumar , Choi Eun Ha
Published: August 2020

The green fabrication of polydopamine-functionalized gold nanoparticles by using plasma–liquid interaction to trigger a redox reaction and their biomedical applications.
γ-Valerolactone-based organic electrolyte solutions: a benign approach to polyaramid dissolution and processing
Authors: Winters Jonas , Dehaen Wim , Binnemans Koen
Published: August 2020

Aromatic polyamides can be dissolved and processed in an organic electrolyte solution, where the ionic liquid and γ-valerolactone interact with the polymer through hydrogen bonding and dispersion forces, respectively.
Open-tubular radially cyclical electric field-flow fractionation (OTR-CyElFFF): an online concentric distribution strategy for simultaneous separation of microparticles
Authors: Liu Lu , Yang Cui , Liu Cuicui , Piao Jishou , Kaw Han Yeong , Cui Jiaxuan , Shang Haibo , Ri Hyok Chol , Kim Ji man , Jin Mingshi , Li Donghao
Published: August 2020

An open-tubular radially cyclical electric field-flow fractionation technique which realizes the online separation of microparticles in a functional annular channel is proposed in this study.
A bilayer TiO2/Al2O3 as the mesoporous scaffold for enhanced air stability of ambient-processed perovskite solar cells
Authors: Wang Dong , Chen Qian , Mo Hongbo , Jacobs Janet , Thomas Andrew , Liu Zhu
Published: August 2020

The air stability of PSCs is enhanced by employing a TiO2/Al2O3 bilayer mesoporous scaffold.
Inducing endoplasmic reticulum stress in cancer cells using graphene oxide-based nanoparticles
Authors: Pandey Shalini , Nandi Aditi , Basu Sudipta , Ballav Nirmalya
Published: August 2020

Graphene oxide based self-assembled nanoparticles were developed to target the endoplasmic reticulum (ER) to induce ER stress in cancer cells.
The long-range π-conjugation between electron-rich species and multiwall carbon nanotubes influences the fluorescence lifetime and electromagnetic shielding
Authors: Biswas Sourav , Panja Sujit S. , Bose Suryasarathi
Published: August 2020

The effect of electronic structures in the non-covalent conjugation and electromagnetic shielding mechanism co-related with fluorescence lifetime opens new avenues in designing electromagnetic absorbers.
Machine learning reveals multiple classes of diamond nanoparticles
Authors: Parker Amanda J. , Barnard Amanda S.
Published: August 2020

Unsupervised clustering and supervised classification of a diverse set of reconstructed, twinned and passivated diamond nanoparticles predict nine classes that have distinctly different characteristics and electronic properties.
Development of self-poled PVDF/MWNT flexible nanocomposites with a boosted electroactive β-phase
Authors: Chandran Akash M. , Varun S. , Mural Prasanna Kumar S.
Published: August 2020

In the present study, we report a simple fabrication method for poly(vinylidene fluoride) PVDF/MWCNT flexible nanocomposite films with a boosted electroactive phase that enhanced the dielectric and piezoelectric properties.
Synthesis, characterization and applications of metallic nanoparticles/rGO blended poly methyl methacrylate membranes for the efficient removal of Cd2+ from model and real wastewater
Authors: Maria  , Muhammad Yaseen , Farooq Muhammad Usman , Subhan Sidra , Subhan Fazle
Published: August 2020

Herein we report the fabrication of polymer blended hybrid membranes from poly methyl methacrylate (PMMA) as a matrix, and reduced graphene oxide (rGO) and Fe2O3, ZnO, CuO and AgO nanoparticles (NPs) as primary and secondary fillers, respectively.
Engineering sulphur vacancy in VS2 as high performing zinc-ion batteries with high cyclic stability
Authors: Yin Bo-Si , Zhang Si-Wen , Xiong Ting , Shi Wen , Ke Ke , Lee Wee Siang Vincent , Xue Junmin , Wang Zhen-Bo
Published: August 2020

Zn2+ diffusion into S-deficient VS2 is enhanced due to lower adsorption energy and slightly wider interlayer spacing of VS2.
Upconversion nanoparticles-labelled immunochromatographic assay for quantitative biosensing
Authors: Hou Fengping , Liu Haiyun , Zhang Yun , Gao Zhendong , Sun Shiqi , Tang Yu , Guo Huichen
Published: August 2020

Quantitative determination of FMDV antibody using immunochromatographic strips with high sensitivity and specificity was achieved within 20 minutes.
Deprotection of S-acetamidomethyl cysteine with copper(ii) and 1,2-aminothiols under aerobic conditions
Authors: Kobayashi Daishiro , Naruse Naoto , Denda Masaya , Shigenaga Akira , Otaka Akira
Published: August 2020

1,2-Aminothiols operate as an S-deprotecting reagent for an S-Acm cysteine with the aid of CuSO4 under aerobic conditions.
Non-hydrogen bond catalyst-mediated diastereoselective conjugate additions of 5H-oxazol-4-ones to o-hydroxyphenyl-substituted p-quinone methides
Authors: Wang Ziyang , Huang Anqi , Fang Fang , Li Pengfei , Liu Guokai , Li Wenjun
Published: August 2020

An efficient DBU-catalyzed conjugate addition of 5H-oxazol-4-ones to o-hydroxyphenyl-substituted p-quinone methides has been developed, affording the valuable diarylmethanes in high yields with excellent diastereoselectivity.
Palladium-catalyzed domino Heck cyclization/ring opening of sulfolenes/desulfitative coupling: regio- and stereoselective synthesis of alkylated conjugated dienes
Authors: Wu Xin-Xing , Ye Hao , Dai Hong , Yang Bing , Wang Yang , Chen Shufeng , Hu Lanping
Published: August 2020

An efficient cascade dienylation provides a range of alkylated conjugated diene compounds with the Z-configuration by introducing the C4 unit directly.
Palladium-catalyzed cyanation of aryl halides with in situ generated CN− from ClCF2H and NaNH2
Authors: Yu Changjiang , Ma Xingxing , Song Qiuling
Published: August 2020

An efficient Pd-catalyzed cyanation of aryl halides with in situ generated CN− anions is described.
Blue phosphorene/Sc2CX2 (X = O, F) van der Waals heterostructures as suitable candidates for water-splitting photocatalysts and solar cells
Authors: Li Xiao-Hua , Wang Bao-Ji , Wang Guo-Dong , Ke San-Huang
Published: August 2020

Using DFT calculations, BlueP/Sc2CX2 (X = O, F) heterostructures are found to have great potential in the field of solar energy applications.
Highly specific recognition of denatured collagen by fluorescent peptide probes with the repetitive Gly-Pro-Pro and Gly-Hyp-Hyp sequences
Authors: Wei Wenyu , Li Dongfang , Cai Xiangdong , Liu Zhao , Bai Zhongtian , Xiao Jianxi
Published: August 2020

Two novel peptide probes provide versatile tools for specifically targeting denatured collagen in various types of connective tissues, which has attractive potential in the diagnosis and therapeutics of collagen-involved diseases.
The use of N^N ligands as an alternative strategy for the sol–gel synthesis of visible-light activated titanias
Authors: Sarigul Gamze , Gómez-Palos Isabel , Linares Noemi , García-Martínez Javier , Costa Rubén D. , Serrano Elena
Published: August 2020

The sol–gel synthesis of hybrid titania–phenanthroline materials with a binary brookite–rutile structure and outstanding photocatalytic activity under visible light.
Equivalent circuit modeling on defect-dipole enhanced dielectric permittivity
Authors: Wang Jian , Gao Dandan , Liu Huan , Xie Jiyang , Hu Wanbiao
Published: August 2020

A new equivalent circuit describing enhanced permittivity associated with non-Debye defect-dipole relaxation.
Exploiting two-dimensional hybrid perovskites incorporating secondary amines for high-performance array photodetection
Authors: Yang Tao , Li Yaobin , Han Shiguo , Liu Yi , Xu Zhiyun , Li Maofan , Wang Jiaqi , Ma Yu , Luo Junhua , Sun Zhihua
Published: August 2020

We present a new 2D hybrid perovskite by alloying secondary dimethylammonium cation as the “perovskiter” into the PbI3 framework, which shows the strong in-plane photoresponses.
Millimeter- and submillimeter-wave spectroscopy of thioformamide and interstellar search toward Sgr B2(N)
Authors: Motiyenko R. A. , Belloche A. , Garrod R. T. , Margulès L. , Müller H. S. P. , Menten K. M. , Guillemin J.-C.
Published: August 2020

Context.Thioformamide NH2CHS is a sulfur-bearing analog of formamide NH2CHO. The latter was detected in the interstellar medium back in the 1970s. Most of the sulfur-containing molecules detected in the interstellar medium are analogs of corresponding oxygen-containing compounds. Therefore, thioformamide is an interesting candidate for a search in the interstellar medium.

Aims.A previous study of the rotational spectrum of thioformamide was limited to frequencies below 70 GHz and to transitions withJ ≤ 3. The aim of this study is to provide accurate spectroscopic parameters and rotational transition frequencies for thioformamide to enable astronomical searches for this molecule using radio telescope arrays at millimeter wavelengths.

Methods.The rotational spectrum of thioformamide was measured and analyzed in the frequency range 150−660 GHz using the Lille spectrometer. We searched for thioformamide toward the high-mass star-forming region Sagittarius (Sgr) B2(N) using the ReMoCA spectral line survey carried out with the Atacama Large Millimeter/submillimeter Array.

Results.Accurate rigid rotor and centrifugal distortion constants were obtained from the analysis of the ground state of parent,34S,13C, and15N singly substituted isotopic species of thioformamide. In addition, for the parent isotopolog, the lowest two excited vibrational states,v12 = 1 andv9 = 1, were analyzed using a model that takes Coriolis coupling into account. Thioformamide was not detected toward the hot cores Sgr B2(N1S) and Sgr B2(N2). The sensitive upper limits indicate that thioformamide is nearly three orders of magnitude at least less abundant than formamide. This is markedly different from methanethiol, which is only about two orders of magnitude less abundant than methanol in both sources.

Conclusions.The different behavior shown by methanethiol versus thioformamide may be caused by the preferential formation of the latter (on grains) at late times and low temperatures, when CS abundances are depressed. This reduces the thioformamide-to-formamide ratio, because the HCS radical is not as readily available under these conditions.
IOT based solar energy prophecy using RNN architecture
Authors: Vijaya Rama Raju V. , Ganapathi Raju N V , Shailaja V , Padullaparti Sugandha
Published: August 2020

It is the 21st century and scientists say that by the end of this century, resources will be replenished and the only way the future generations can access energy is through renewable resources— those which are inexhaustible. One such source is sunlight, which has a guaranteed stay in the long run. The energy thus given is termed as solar energy. In the present paper it is tried to solve the issue of limited resources and their adverse effects. Since the power generated from solar energy systems is highly variable, due to its dependence on meteorological conditions, an efficient method of usage of this fluctuating but precious energy source has to come in picture. This requires the scope of reliable forecast information as the development of predictive control algorithms for efficient energy management and monitoring for residential grid connected photovoltaic systems. The paper has given an overview of different applications and models for solar irradiance and photovoltaic power prediction, including time series models based on live measured data from rooftop solar power plant located at 17.5203° N, 78.3674° E. For experimentation, data collected over four years from the solar power plant was used in order to the train machine and understand the characteristics of the solar power plant and gives the predicted energy as the result. The use of Deep Learning is done where LSTM is used for the training and keras and tensorflow are used for obtaining the result. The mean square error thus obtained is 0.015.
Driving license detection using QR code
Authors: Ratakonda Bhavani , Therala Ajay , Hanumanthu Chanikya Kumar
Published: August 2020

We have proposed a system in which it simplifies the work of traffic police in detecting the fake driving license users. RTO Employee can login into this system and generate a new driving license with QR code for every applicant who has undergone test drive and who has successfully secured their learning license. In this system every employee can login with their credentials, they can generate a QR code and they can enter the details of applicant and generate new license with QR code attached to it. Traffic police can scan this QR code through Scanner app from mobile phone to retrieve the data present in QR code, if data retrieved in scanner app and data on the license mismatches then police can conclude that user is a fake user. QR code on the driving license contains name, father’s name, date of birth, house no., address and date up to when the card is valid.
A Comparative Study using Feature Selection to Predict the Behaviour of Bank Customers
Authors: Musunuru Sreethi , Mukkamala Mahaalakshmi , Kunaparaju Latha , Raju N V Ganapathi
Published: August 2020

Though banks hold an abundance of data on their customers in general, it is not unusual for them to track the actions of the creditors regularly to improve the services they offer to them and understand why a lot of them choose to exit and shift to other banks. Analyzing customer behavior can be highly beneficial to the banks as they can reach out to their customers on a personal level and develop a business model that will improve the pricing structure, communication, advertising, and benefits for their customers and themselves. Features like the amount a customer credits every month, his salary per annum, the gender of the customer, etc. are used to classify them using machine learning algorithms like K Neighbors Classifier and Random Forest Classifier. On classifying the customers, banks can get an idea of who will be continuing with them and who will be leaving them in the near future. Our study determines to remove the features that are independent but are not influential to determine the status of the customers in the future without the loss of accuracy and to improve the model to see if this will also increase the accuracy of the results.
Comparison of GAN, SIC, SI Technology for High Frequency and High Efficiency Inverters
Authors: Pullabhatla Sai Kiran , Bobba Phaneendra Babu , Yadlapalli Satyavani
Published: August 2020

Power semiconductor devices plays a major role in efficient power conversion. As we have Silicon (Si), Silicon Carbide (SiC) and Gallium Nitride (GaN) based power devices, GaN technologies are ideal for working in high frequency power electronic systems (in MHz). Because the GaN has superior electron mobility and bandgap than the SiC and Si it has superior characteristics like low conduction losses, high switching rate so that there is better power efficiency than SiC, Si based inverter. Here we are using the Gan based High-Electron-Mobility Transistor (HEMT) and SiC and Si based mosfet in the inverter. The proposed inverter of different topologies is designed to transfer the power at >1MHz range. Comparison of the three different switches is done by the output power and the efficiency of the inverter. This paper presents the SPICE simulation results of the class d and class e inverter of output power 1KW.
Taguchi Optimisation In Machining EN18 Using Coated Tool Under Dry and MQL Condition
Authors: Satynarayana Kosaraju , Swathi Are , Neeraja Kesari , Samaikhya Madipali , Rajkiran Kumkuma
Published: August 2020

Turning is one of the initial basic machining operation that prevails in assembly and production process. Modern techniques have been practices in rapid and eco-friendly production systems. Present study deals with the investigation of turning process on EN 18 steel which is been shown its existence in automobiles industries. Turning operation was performed using a coated tool insert with varying cutting speed (100, 125 and 150 mm/min), feed rate (0.05, 0.5, 0.15 mm/rev) and depth of cut (0.4, 0.8, 1.2 mm) at both dry and MQL conditions. The results obtained was compared to optimize the effect of minimum quality lubrication on surface roughness. Experimentally it was observed that speed of 100 m/min with combination of feed of 0.05 mm/rev and 0.4 mm depth of cut was found to be optimized for surface roughness in both the cases. The mathematical model generated for surface roughness and MRR for both dry and MQL turning models having better regression fit as it closer to 100. From ANOVA analysis feed was proved to be the highest contributing factor for surface roughness and for MRR speed is the most significant factor for both dry and MQL turning
Experimental Studies on Machining EN45 Steel under Dry and MQL using Uncoated Inserts
Authors: Satynarayana Kosaraju , Sreenivas Reddy Gayam , Srikar Chitimilla , Gnyaneshwar Janaswami , Shyam Prasad Yedla , Rajkiran Kumkuma
Published: August 2020

In owe to the global concern of environment growth and green production acts with use biodegradable and low consumption of lubrications the present paper deals use of MQL in turning EN 45 steel. Literacy over the use of effective production practices increases the efficiency of surface integrity and economical effect of production. With this aspect, the present study deals with of surface roughness characteristic generated while turning EN 45 graded spring steel with uncoated CNMG insert under MQL condition. A total of 27 experiments are performed on a CNC lathe under both Dry and MQL conditions. Surface roughness produced with varying in machining parameter of cutting speed (75, 100, 125 m/min), feed rate (0.1, 0.2, 0.3 mm/rev) and depth of cut (0.3, 0.6, 0.9 mm). Effect of induvial parameter over surface roughness is been clearly pictured out with the graphical representation with comparison under both DRY and MQL conditions. A mathematical model was generated with the experimental results for prediction of roughness within the limits of parameters. ANOVA analysis, feed shows a high contribution towards the surface roughness.
Analog to Digital Converters (ADC): A Literature Review
Authors: Dalmia Hemlata , Sinha Sanjeet K.
Published: August 2020

The signal processing is advancing day by day as its needs and in wireline/wireless communication technology from 2G to 4G cellular communication technology with CMOS scaling process. In this context the high-performance ADCs, analog to digital converters have snatched the attention in the field of digital signal processing. The primary emphasis is on low power approaches to circuits, algorithms and architectures that apply to wireless systems. Different techniques are used for reducing power consumption by using low power supply, reduced threshold voltage, scaling of transistors, etc. In this paper, we have discussed the different types and different techniques used for analog to digital conversion of signals considering several parameters.
Experimental investigations and optimization of process parameters of meshed-wick heat pipe
Authors: Nookaraju B.Ch , Hemanth Sai B. , Himakar K.V.N.S , Limba Reddy N. , Sateesh N
Published: August 2020

Heat pipes are used to transfer heat, which are hollow cylindrical shape device filled with small amount of working fluid, which can change its phase. The rate of heat transfer in heat pipes compared to normal heat exchanging devices is more. Depending on the applications of heat transfer various heat pipes are being designed. Methanol fluid is used with 50% fill ratio. It is made of copper with outer diameter of 15.88mm and inner diameter of 14.88mm. It consists of a screen mesh made of copper powder inside it with thickness of 0.5mm. Due to heat input methanol changes its phase from liquid to vapor. The vapor loses its heat and changes its phase back to liquid in the condenser. At the condenser section the vapour gives up it heat and changes its phase from vapour to liquid. The screen mesh assists the flow of condensed working fluid through capillary action. Optimized the results by “Taguchi method” using “Minitab software”. The Thermal analysis was done with the optimum conditions, which were obtained as a result from the optimization method by Ansys Fluent software. Then finally compared the thermal parameters obtained from experiments with the Thermal analysis result. It is found the maximum heat transfer rate is optimized using meshed wick heat pipe conditions.
A Review on Comparison of Mechanical Properties of Dissimilar Steels Welded By TIG and MIG
Authors: Suresh Kumar D. , Srikar Pendem
Published: August 2020

In this review the study will be carried out on comparison of Mechanical Properties like Hardness and Strength of joints welded by TIG and MIG processes. Welding of dissimilar steels has became most common process now days in wide applications in industries. The Stainless Steel and Mild Steel joints have more applications in structural industries which provide good combination of Mechanical Properties like strength, Corrosion resistance etc. Selections of welding process for different material are difficult because of their physical and chemical properties. To obtain good quality of weld, it is necessary to select proper welding technique according to the materials selected for welding
Design of Flying Capacitor Multilevel Inverter for Solar Energy Applications
Authors: Pawar Nitin , Kumar Tayal Vijay , Choudekar Pallavi
Published: August 2020

The continuous rise in electricity demand leads to adoption of renewable energy sources such as sun, wind for power generation. In order to utilize the electric power obtained from renewable solar energy, inverters are required to inject the electricity into the grid. This paper presents single phase flying capacitor multi-level inverter with help of SPWM technique. The comparison of single phase three-level, five-level and seven-level flying capacitor multilevel inverters is carried out with respect to waveform pattern, output current, output voltage, active power and reactive power waveforms. The simulations are conducted in MATLAB/SIMULINK environment.
Optimization of post weld heat treatment cycle of fiber laser welded bainitic steel
Authors: Ramakrishna R VSM , Gautam JP
Published: August 2020

Automobile industry has always been in look out for advanced materials that would account for greater crash resistance, high fatigue strength, optimum ductility and longer service life despite heavy mechanical loads applied on these engine components. These critical requirements are met through maintaining the complex microstructures and optimum phase constituents. The retention of microstructural constituents has always been a key parameter while fabricating these advanced automobile materials by fusion welding process. Carbide free bainitic steels are emerging out to be the candidate materials for automobile applications. Owing to their microstructure consisting fine bainitic ferrite laths that are interwoven with retained austenite in their lath boundaries. The fine Bainitic laths provide enough strength and the retained austenite phase facilitates the desired ductility. The current paper critically discusses the microstructural and microhardness variation across the zones during Fiber Laser welding of bainitic steel sheets. Keeping the phase transformations during welding in view, post weld heat treatments were undertaken. The welded steel was austenitized at 820 OC, rapidly cooled to 390 OC, and soaked at different durations before furnace cooing. The microstructure variation and microhardness profiling were done at all these heat treatment conditions. Basing on the analyses, the heat treatment cycle has been optimized.
Relay Feedback Identification based Load Frequency Control and Controller Design
Authors: Pavan Kumar Reddy Kunduru Laxmi , Padhan Dola Gobinda
Published: August 2020

The main objective of power system operation and control is to maintain the continuity of supply with required quality and reliability. In power system operation one of the issue is Load frequency control. Generally, the dynamics of the system ( i.e the over all dynamics of governor ,turbine, load and machine) for isolated or inter-connected power system is of higher order. The controller design for a higher order system is a tedious process. In order to over come this difficultly relay feedback identification approach has been adopted. In this approach the higher order system has been reduced to lower order system by the method of IMC-PID tuning control. Robust controller has been design for identified model for single area power system in order to achieve satisfactory closed loop performance. The same concepts have been readily extended to multi area power system.
An Approach for Future-Oriented Framework Design: A Tool for Design Research
Authors: Kumar Singh Akhilesh , Temmanaboina Giri Vijay , Gummalla Prasanth , Kumar Pramod
Published: August 2020

Metals and Metals-alloys play a significant role in the everyday life of researchers and also in industrial applications to develop a new framework product. New development of tool and techniques help researchers to do their work smoothly. Multi-purpose machines mainly help researchers to do framework design and research as per need and it will save both cost and time. In this paper, the main aim is to develop a machine-stand that performs machine operations in a single column (either side of the column). The operations are cutting, grinding, and drilling. The purpose of the machine is to support researchers in their research work, with high precision to drill without any (human error) vibrations and to cut the work-samples without edges loses. The machine is designed for portable purposes, that can be used in laboratory, field, workshop, and workplace, etc. to do operations of cutting and drilling in various places. The same machine is used for multi-operation, instead of using separate fixed flame machines such as cutting, grinding, and drilling machines. The machine operates through power sources with liquid coolant lubricant and the operations performed simultaneously or individually
Study and Optimisation of Process Parameter in Turning Of EN 45 - Spring Steel Material Under Dry And MQL Conditions
Authors: Satynarayana Kosaraju , Rajkiran Kumkuma , Sai Kiran Kalemula
Published: August 2020

Minimum quality lubrication has shown a noticeable changes with machining outcomes. MQL is one of updated technologies that have been prevailing in contributions towards production and environment enhancement. Present papers deals with the turning of EN 45 steel material which is commonly known to be spring material. En 45 one of the magnetic steel material with low manganese and high amount of carbons is turned under dry and MQL condition. DOE has been prepared with L9 taguchi. Machining factors of speed (75, 100, 125 m/min), feed (0.1, 0.2, 0.3 mm/rev) and depth of cut (0.3, 0.6, 0.9 mm). The surface roughness were optimized by considering the machining parameters of speed, feed, and depth of cut. For both the condition dry and MQL it was observed that speed at 125m/min, feed at 0.1 and depth of cut at 0.3mm was found optimum condition. The regression equation and mathematical model was generated using the experimental data. Furthermore the ANOVA analysis was performed and observed that in case of dry turning speed found to be most influencing parameter and in case of MQL turning Feed was found to be most influencing parameter.
A Survey of DDOS Attacks Using Machine Learning Techniques
Authors: Arshi M , Nasreen MD , Madhavi Karanam
Published: August 2020

The DDoS attacks are the most destructive attacks that interrupt the safe operation of essential services delivered by the internet community’s different organizations. DDOS stands for Distributed Denial Of Service attacks. These attacks are becoming more complex and expected to expand in number day after day, rendering detecting and combating these threats challenging. Hence, an advanced intrusion detection system (IDS) is required to identify and recognize an- anomalous internet traffic behaviour. Within this article the process is supported on the latest dataset containing the current form of DDoS attacks including (HTTP flood, SIDDoS). This study combines well-known grouping methods such as Naïve Bayes, Multilayer Perceptron (MLP), and SVM, Decision trees.
Functional safety requirements of traction inverter in accordance to ISO 26262
Authors: Bhavana R , Indela Omsekhar , Yaragatti Mohammed Sajid
Published: August 2020

With the improvement and development in the automotive, the safety related aspects are also becoming more important. Hence there is a stringent demand for the Functional Safety and reliability. In these years, most of the vehicles are made with electrical and electronic components and systems which include lots of Electronic Controller Units (ECUs), electronic sensors, bus systems with coding. Due to the complexity in application of these electrical, electronics and programmable electronics, it is necessary to analyze the potential risk of malfunction for automotive systems. Thus, ISO 26262 has been introduced for automotive electrical/electronic (E/E) systems which ensure the complete safety installation of all ECUs, E/E systems its technical as well as management issues. In this paper, functional safety in accordance with ISO 26262 Part 3 of an electric traction inverter is done, the Functional safety report is generated in MEDINI TOOL and the short circuit fault of traction inverter is considered for Functional safety using MATLAB/SIMULINK.
Review on Laminated Busbars used in High Frequency Inverters
Authors: Jagadeesh Chirisavada , Himavarsha Gajala , Phaneendra Babu Bobba
Published: August 2020

Improvement in the efficiency and cost in the high frequency inverter will play a major role in its applications like electrical vehicles (EV). A high voltage IGBTs are used in inverters to bear the voltage peaks across the IGBT switch at the turning off period of switch. By decreasing the value of voltage peak, can reduce the voltage rating of IGBT switch, by which the system cost will decrease. Decreasing the value of voltage peak can be achieved by decreasing the inductance of the inverter circuit which includes turned on switch inductance, DC link capacitors inductance and connecting wires inductance. By replacing the connecting wires with a laminated busbar in an inverter, the inductance value of a connecting wires can be reduced. Laminated bus bar is a parallel conductor plates separated by a dielectric medium. Upper plate is considered as positive plate and lower plate is a negative plate. In this paper it gives a detailed information about laminated busbar with different designs, using different conductive materials, their calculated inductance in ANSYS 3D FEM software and concluding with suitable laminated busbar for high frequency inverter.
A New Solution to Profit Based Unit Commitment Problem Considering PEVs/BEVs and Renewable Energy Sources
Authors: Nandi Ayani , Kamboj Vikram Kumar
Published: August 2020

Daily load demand for industrial, residential and commercial sectors are changing day by day. Also, inclusion of e-mobility has totally effected the operations of realistic power sector. Hence, to meet this time varying load demand with minimum production cost is very challenging. The proposed research work focuses on the mathematical formulation of profit based unit commitment problem of realistic power system considering the impact of battery electric vehicles, hybrid electric vehicles and plug in electric vehicles and its solution using Intensify Harris Hawks Optimizer (IHHO). The coordination of plants with each other is named as Unit commitment of plants in which the most economical patterns of the generating station is taken so as to gain low production cost with higher reliability. But with the increase in industrialization has affected the environment badly so to maintain the balance between the generation and environment a new thinking of generating low cost power with high reliability by causing less harm to environment i.e. less emission of flue gases is adopted by considering renewable energy sources.
Dynamic force signal analysis in dry finish turning of Aluminium metal matrix composites
Authors: V Srinivasa Rohit. , Anne Venu Gopal , L Ramakrishna
Published: August 2020

Metal matrix composites (MMC) have found wide applications in the transportation sector. But, the presence of hard particles in the MMCs causes catastrophic tool failures. The current study presents a method to select process parameters to increase the material removal rate in finish turning of Al-MMC (Al 6061, 5% SiC, 3% C) using TiN coated carbide inserts. The key aspects of the method are (a) Using the fractional factorial method for performing experiments economically (b) Using radial force instead of cutting force (c) Using frame statistics and linear spectrum of the radial cutting force signal to select process parameters. The experiments were conducted on a precision lathe. A 6-component piezoelectric dynamometer was used to measure the cutting force.