bluuebunny/crossref_metadata_2025 huggingface dataset:
Elementary processes of DNA surface hybridization resolved by single-molecule kinetics: implication for macroscopic device performance
Authors: Harashima Takanori , Hasegawa Yusuke , Kaneko Satoshi , Jono Yuki , Fujii Shintaro , Kiguchi Manabu , Nishino Tomoaki
Published: December 2020

Hybridization of a single DNA molecule on a surface was investigated by electrical conductance measurements. The hybridization efficiency increases with increasing the DNA concentration, in contrast to preceding studies with ensemble studies.
Redox-active benzimidazolium sulfonamides as cationic thiolating reagents for reductive cross-coupling of organic halides
Authors: Zhang Weigang , Huang Mengjun , Zou Zhenlei , Wu Zhengguang , Ni Shengyang , Kong Lingyu , Zheng Youxuan , Wang Yi , Pan Yi
Published: December 2020

Redox-active benzimidazolium sulfonamides as thiolating reagents have been developed for reductive C–S bond coupling.
Dual Li-ion migration channels in an ester-rich copolymer/ionic liquid quasi-solid-state electrolyte for high-performance Li–S batteries
Authors: Cai Xiaomin , Ye Bei , Ding Jianlong , Chi Ziyun , Sun Liping , Saha Petr , Wang Gengchao
Published: December 2020

A novel ester-rich copolymer/ionic liquid quasi-solid-state electrolyte (SPE-IL) was designed, and dual Li-ion migration channels (“association–disassociation” with the carbonyl groups and rapid ion exchange with the ionic liquids) were built in it.
Self-assembling tetrameric peptides allow in situ 3D bioprinting under physiological conditions
Authors: Rauf Sakandar , Susapto Hepi H. , Kahin Kowther , Alshehri Salwa , Abdelrahman Sherin , Lam Jordy Homing , Asad Sultan , Jadhav Sandip , Sundaramurthi Dhakshinamoorthy , Gao Xin , Hauser Charlotte A. E.
Published: December 2020

Tetrameric peptide-based bioinks allow the printing of 3D cell-laden scaffolds under true physiological conditions avoiding harsh UV or chemical treatment.
Cesium-lead-bromide perovskites with balanced stoichiometry enabled by sodium-bromide doping for all-vacuum deposited silicon-based light-emitting diodes
Authors: Qin Fengyou , Tian Hongjun , Yan Minxing , Fang Yanjun , Yang Deren
Published: December 2020

A more balanced stoichiometry is realized in vacuum vapor deposited cesium-lead-bromide perovskite films through the introduction of NaBr.
High-performance flexible fully-printed all-carbon thin film transistors and ultrasensitive NH3 sensors
Authors: Ren Yunfei , Li Min , Li Xiaoqian , Geng Yue , Wang Xin , Zhao Jianwen
Published: December 2020

We construct flexible fully-printed all-carbon thin film transistors, which show excellent electrical properties, mechanical flexibility and high sensitivity (346.73%) to NH3 with good selectivity, low limit of detection and low power consumption.
Prospects and technology of cultivation of organic vegetable production on open ground in southern Russia conditions
Authors: Ezov Anzor , Shibzukhov Zalim-Geri , Beslaneev Beslan , Shibzukhova Zalina , Khantsev Martin
Published: December 2020

To receive a high-quality competitive and environmentally friendly product, you need a well-thought-out agricultural technology, high level of biosecurity and spatial isolation. To develop an effective technology for growing environmentally friendly new potatoes, in the soil and climatic conditions of the high-altitude zone of Kabardino-Balkaria, scientific work was carried out, taking into account the achievements of modern agriculture. In the conditions of the mountain zone, nature has created a clean phytosanitary zone, in which you can get high-quality, environmentally friendly products without increasing their cost. The production process in this case will exclude the control of diseases and pests that in this zone will not exceed the economic threshold of harmfulness. In potato seed production, the initial stage was the use of improved material for growing a regenerating plant from the meristem, propagated in sterile, laboratory conditions for further cloning. With such seed material that is initially free of pathogens, it is much easier to get organic products. According to various estimates, the cost of producing environmentally friendly products in agriculture is 2.5-3 times higher than the cost of traditional production, and as a result, the cost of products increases. The analysis of economic efficiency showed that the increase in net income depends on the received potato yield and the sale price of new potatoes.
Effect of Bacillus pumilus 3-19 protease on growth parameters and gut microbiome of broiler chickens
Authors: Pudova Daria , Koryagina Anastasia , Rudakova Natalya , Mardanova Ayslu , Sharipova Margarita
Published: December 2020

The objective of the study was to determine the effect of adding protease obtained from the Bacillus pumilus 3-19 strain to the diet of Hubboard broiler chickens on the growth indicators of poultry and the composition of the cecum microbiota of broiler chickens. As a result of metagenomic analysis of 16S rRNA genes in the contents of the cecum of chickens, it was shown that the control and experimental groups formed two separate clusters, which indicates differences in microbial communities in these two groups. Analysis of alpha diversity showed an increase in species richness in the group of chickens that received protease as a feed additive. On day 35, both groups were dominated by bacterium of Firmicutes (21.13 — 49.01%) and Bacteroidetes (37.68 — 67.72%) groups. It was shown that in the group of chickens receiving protease as a feed additive, the average daily gain in live weight was higher than in the control group by 0.5 kg (P < 0.05). The introduction of protease resulted in an increased F/B ratio, which was positively correlated with chicken body weight. Thus, the addition of B. pumilus 3-19 protease to broiler feed leads to improved feed intake and digestibility, which is of great importance for reducing the cost of the final product. The use of protease regulates the cecum microbiota of broiler chickens and increases microbial diversity on 35 day of chicken growth.
Main genetic defects of improving breeds in the population of Sychevsky cattle of the Smolensk region
Authors: Zimina A.A. , Romanenkova O.S.
Published: December 2020

The Sychevskaya breed belongs to local breeds of the combined direction of productivity. The use of the world’s best gene pool of the Holstein and Simmental breeds allows to improve the productive qualities of the livestock, but at the same time it introduces a number of recessive genetic mutations into the gene pool of the Sychevskaya breed. 150 cows of the Vazuzsky type and 34 sires of the Sychevskaya breed were studied. The incidence of hidden carriers of thrombopathia was 1.4±0.009 % among cows and 5.9±0.04 % among breeding bulls. Animals in the cow group belonged to the Aromat 3433 line and other lines, and in the bull group - to the Toreador 3032 line. In the cows group, 12 carriers of subfertility and 6 carriers of cholesterol deficiency were identified, which is 8±0.022 % and 4±0.016 %, respectively. The linear affiliation of animals goes back to the lines of Redad 711620016730 (subfertility), Reflection Sovering 198998 and Klever 68 (HCD). The frequency of occurrence of undesirable alleles in the genotypes of Vazuzsky type cows according to theTMEM95, RASGRP2, andAPOBgenes was 0.040; 0.067; 0.020, and in the genotype of sires according toRASGRP2– 0.030.
Long-term tendencies in climate change of the Urals due to global warming
Authors: Vasiliev A.A. , Ufimtseva L.V. , Glaz N.V. , Nokhrin D.Yu.
Published: December 2020

During the observation period, the annual air temperature increased: in Yekaterinburg (1832-2018) by 3,1°C, in Zlatoust (1881-2018) by 2,2°C, in Kurgan (1894-2018) by 2,2°C and in Shadrinsk (1894-2018) by 2,1°C. The analogical climate change was noted for the period 1966-2018. The strongest warming is observed in winter (by 2,3-3,0°C), the weakest warming is observed in spring (by 0,8-1,7°C). We noted an increase the annual amount of precipitation in Ivdel (by 68,2 mm), Shadrinsk (by 50,9 mm) and Krasnoufimsk (by 43,6 mm). Also marked an increase the amount of precipitation during the growing season in Ivdel (by 43,9 mm), Shadrinsk (by 42,8 mm) and Krasnoufimsk (by 26,8 mm). The annual amount of precipitation increased in Chelyabinsk and Yekaterinburg, but the amount of precipitation during the growing season decreased in Kurgan. Favorable changes in the agro-climatic conditions of growing season were noted in Shadrinsk and Zlatoust. Unfavorable changes in hydrothermal coefficient for cultivated plants were noted in Chelyabinsk, Kurgan, Troitsk, Yekaterinburg and Bredy. Identified the need to introduce an irrigation system for cultivated plants of the southern districts (Chelyabinsk region).
Changes in transport activity regulation in the context of the coronavirus pandemic
Authors: Makhiboroda Maxim , Ananyeva Ekaterina , Doucek Ing. Petr
Published: December 2020

In the article, the authors consider the activities of transport companies in the context of the coronavirus pandemic. The main research concerns the organization of the process of replacing the time of service provision by contractors when they are in emergency situations or when it is impossible to fulfill transport contracts at the set time. For the first time in the history of mankind, legal states are faced with the need to immediately close borders, prohibit citizens from leaving not only their own state, but also their place of residence in whole. Digitalization of the processes of instant solution of issues related to the activities of transport organizations turned out to be inoperable in relation to the realities of the new time. The state, trying not to destroy the country’s economic system and preserve the transport system, was forced to immediately introduce online services and other technological resources. Analysis of changes in the accompanying documentation and regulations at the level of federal laws, departmental and local regulations shows that civil society and its institutions in the future will not be able to do without thoughtful innovations and regulatory support for the technical component of transport regulation.
Ab initio calculations of the electronic structure for Mn2+-doped YAlO3 crystals
Authors: Piskunov S. , Isakoviča I. , Putnina M. , Popov A. I.
Published: December 2020

The electronic structure of Mn2+ ion substituted for the host Y atom in orthorhombic bulk YAlO3 crystals has been calculated by means of hybrid exchange-correlation functional HSE within density functional theory. The supercell approach has been used to simulate in Pbnm YAlO3 crystal the point defects, Mn-dopant and compensated the F+ center (oxygen vacancy with one trapped electron), to make unit cell neutral. Large 2 × 2 × 2 supercells of 160 atoms allow us to simulate substitutional point defect with concentration of about 3%. Mn2+ ions substituting for host Y form covalent Mn–O bonds, in opposite to the mostly ionic Y–O bond. The F center inserted to compensate the Mn2+ dopant in YAlO3 affects the electronic structure of a host material inducing three defect energy levels in the band gap.
First principles hybrid Hartree-Fock-DFT calculations of bulk and (001) surface F centers in oxide perovskites and alkaline-earth fluorides
Authors: Eglitis R. , Popov A. I. , Purans J. , Jia Ran
Published: December 2020

We report the results of ab initio calculations and analysis of systematic trends for the F centers in the bulk and on the (001) surface in oxide perovskites, such as BaTiO3, SrTiO3, SrZrO3, and PbZrO3, with a corresponding comparison of the F centers in perovskites with those in alkaline earth metal fluorides (CaF2, BaF2, and SrF2). It was found that in perovskites in both bulk F centers and those on their (001) surfaces, two nearest to the vacancy Ti or Zr atoms repel each other, while the next nearest O atoms relax towards the oxygen vacancy. It was also found that the obtained relaxations of atoms in the nearest neighborhood around the F center in ABO3 perovskites are generally larger than in alkaline earth metal fluorides. The bulk and (001)-terminated surface F center ground states in BaTiO3, SrTiO3, and SrZrO3 perovskites are located 0.23, 0.69, 1.12 eV, and 0.07, 0.25, 0.93 eV, respectively, below the conduction band bottom, indicating that the F center is a shallow donor. The vacancies in BaTiO3, SrZrO3, and PbZrO3 are occupied with 1.103e, 1.25e, and 0.68e, respectively, whereas slightly smaller charges, only 1.052e, 1.10e, and 0.3e are localized inside the F center on the perovskite (001) surface. In contrast to the partly covalent ABO3 perovskites, charge is well localized (around 80%) inside the ionic CaF2, BaF2, and SrF2 fluorine vacancy.
Morphological and genetic characterisation of the introduced copepod Lernaea cyprinacea Linnaeus (Cyclopoida: Lernaeidae) occurring in the Murrumbidgee catchment, Australia
Authors: Zhu Xiaocheng , Barton Diane P. , Wassens Skye , Shamsi Shokoofeh
Published: December 2020

Lernaea is a genus of freshwater parasitic copepod, consisting of around 80 species. The anchor worm (L. cyprinacea) is the most well-known species because of its wide distribution beyond its native range and significant effect on freshwater host species. In Australia, nearly all reported Lernaea infections are referred to as L. cyprinacea without molecular evidence. Identification solely based on morphological features is not reliable due to the highly variable morphology of Lernaea species, especially of the most important characteristic, the anchor. In Australia, the species has now been found on many native fish, including in the Murrumbidgee catchment area, which is home to several endangered species. To provide clear identification of Lernaea species, we sampled Lernaea from six fish species from various localities in the Murrumbidgee catchment, south-eastern Australia. The Lernaea specimens were described using combined traditional morphological observation and three gene regions. Although significant morphological variations were found, limited genetic differences in all three gene regions suggested they all belong to one species. Phylogenetic analyses of all tested species and those reported from other parts of the world suggested our specimens are L. cyprinacea. This study provides strong evidence for the occurrence of an introduced invasive species in Australia.
A genre-based investigation of the “About Us” section of private hospitals’ websites
Authors: Aghbolagh Nasser Salimi , Hashim Azirah , Mei Cecilia Cheong Yin
Published: December 2020

Medical tourism industry is currently viewed as one of the lucrative sources of income for some countries and in
essence, owes much of its reputation and success to private hospitals and the Internet (Connell, 2006). However, how these private hospitals discursively present themselves to prospective health tourists in
order to entice them to use their medical services rather than their rivals’ still remains under-researched. Following the ESP
genre school, this study seeks to explore the “About Us” sections of private hospitals’ websites and aims to see how such sections
are rhetorically designed and constructed. Using Bhatia’s (1993, 2004) move structures for promotional texts, this study examines the rhetorical structure of the
constituent webpages of the “About Us” sections of forty-one Malaysian private hospitals’ websites. Our study demonstrates how
Malaysian private hospitals utilize a number of cognitive structures to present and promote themselves in their “About Us”
sections. Our findings are, in general, beneficial for the private hospitals in Malaysia or elsewhere in the world, and in
particular, are helpful for novice medical website designers.
Relations between literacy-related abilities and the lexical quality of expository texts of Hebrew-speaking children (Relaciones entre habilidades relacionadas con el aprendizaje de la lengua escrita y la calidad léxica de los textos expositivos de niños hebreo-parlantes)
Authors: Seroussi Batia , Stavans Anat , Zadunaisky-Ehrlich Sara
Published: December 2020

This study sought to explore the advanced lexicon, one of the hallmarks of text quality. To this end, we analysed the advanced lexicon deployed in the production of two types of texts — a descriptive and an argumentative — by Hebrew-speaking school children. Our study had two goals, the first to trace the developmental path of the use of advanced lexicon in writing scholastic types of texts. The second goal was to investigate the relations between literacy-related abilities and the use of advanced lexicon in writing. Accordingly, 292 Israeli grade-school children (second-, third-, fourth- and fifth-graders) were administered a linguistic, cognitive, reading and spelling test battery and produced two descriptive and two argumentative texts. The texts were analysed for noun abstractness, occurrence of internal-state verbs and the morphological complexity of adjectives. Findings showed an age-related increase in both literacy-related abilities and the lexical quality in the texts. Moreover, interactions found between lexical quality, age and genre suggest that text quality is dynamic, determined by a network of differential age- and literacy-related factors.
Molecular dynamics simulation of transversely isotropic elastic properties of carbon nanocones
Authors: Taheri Seyed Saeid , Seyyed Fakhrabadi Mir Masoud
Published: December 2020

In this paper, transversely isotropic elastic properties of carbon nanocones are studied using molecular dynamics simulation implemented in the large-scale atomic/molecular massively parallel simulator (LAMMPS). All atomic interactions are calculated based on the Adaptive Intermolecular Reactive Empirical Bond Order (AIREBO) potential energy functions. To determine the five independent elastic constants, four distinct loading conditions, i. e. uniaxial tensile, longitudinal torsion, in-plane biaxial stretching, and in-plane shear are imposed. The results reveal that Young’s and axial shear moduli are dependent on the apex angle of carbon nanocones, while the effect of the length on them is negligible. Furthermore, the in-plane bulk modulus and in-plane shear constant of these structures increase as their apex angle increases.
Software for measuring parameters of single photon detectors at a modular research quantum key distribution setup
Authors: Kashirskii D E , Mazhitova M S
Published: December 2020

This article considers the issue of developing software for automated measurement of single photon detectors parameters at a modular research quantum key distribution setup. Using the developed software, a technique for measuring single photon detector parameters was tested. The dependences of the parameters on the pulse repetition rate, the degree of attenuation of laser radiation, and the duration of one measurement are analyzed.
Multi-Agent Analysis of Scenarios for “Arctic Smart City”
Authors: Kruglikov S V , Zakharova G B
Published: December 2020

An approach to formalizing problems of municipal management in the Russian Arctic via smart city technologies is considered on the example of city Salekhard. An analysis of modern smart city concepts and prospects for integrating such technologies as BIM, GIS, and CIM is given. A discussion is based on comparison of two options to implement smart city technologies. Those are: 1) the inertial scenario of development adopted in the Strategy of the municipality Salekhard city, and 2) an alternative scenario corresponding to the innovation model of multicomponent sustainable system which includes energy subsystems. A multi-agent formalization of city management presents specific object features, including factors of the Northern nature. The framework of a four-component model of the flow distribution of resources: material, energy, information, financial, is applied.
Registration of the quantum state of a single photon to create a satellite quantum network
Authors: Kurochkin V L , Khmelev A V , Petrov I V , Miller A V , Feimov A A , Mayboroda V F , Balanov M Y , Krushinsky V V , Popov A A , Kurochkin Y V
Published: December 2020

Artificial satellites employed as trusted nodes can increase the distance between two parties to establish quantum key distribution (QKD), unlike fiber based communication lines that are limited up to a few hundred kilometers. This report summarises our progress on a ground receiver for satellite QKD and its tracking receiving system (TRS). The authors demonstrate the operation of the TRS in practice and achieve standard tracking error of 1.4/Ltrad observing four satellites over 80% of the time they were available. The optical signal, which was the sunlight reflected of low Earth orbit satellites, was attenuated to a single photon level and was detected effectively using avalanche single photon detectors. The authors have thus proved that the developed system is capable of stable reception of quantum signal from a satellite.
Prediction of traffic flows by applying the statistical method
Authors: Lebedeva O A , Poltavskaya J.O
Published: December 2020

Traffic flows in the streets network undergo changes not only during the day, but also on the weekdays. Existing models take these changes into account as unpredictable fluctuations. Flows may vary systematically due to differences in the schedules of industrial enterprises, warehouses, and terminals. By analyzing the statistics, weekdays or seasons are determined when the flows predictably differ. To process the data, it is necessary to develop models or amend the initial data of the model (in the case of everyday dynamic models) to verify the reliability of the proposed methods. In order to investigate daily variability, as well as take into account the dynamics during the day, the distribution of flows is analyzed using functional linear models. The result of the study is the ability to predict traffic flow by day of the week or season. Testing is carried out on real data. The daily circulation was found to vary significantly for each day of the week, including differences in time and peak flux duration, as well as the relationship between peak and peak peaks. This technique aims to increase the efficiency and reliability of the transport sector as a whole.
Cost optimization of intermodal freight transportation in the transport network
Authors: Lebedeva O A , Poltavskaya J O
Published: December 2020

Intermodal freight transport is an alternative to trucking to distribute large volumes of goods. The article presents the solution of the problem of tactical planning and choice of transportation options. When using railway freight consignors take into account the traffic capacity. Trucking is used for short distances for transportation to intermodal terminals or direct supplies to customers. The study provides an analysis of trucking and intermodal transport in relation to cargo consolidation and cost of services on a model basis. The approach is applied to the industrial distribution system of the region.
Digital image processing systems based on functional-oriented processors with a homogeneous structure
Authors: Lookin N A
Published: December 2020

Real-time digital image processing as part of mobile systems requires solving the problems of development high-performance specialized processors for intraframe image processing. The graphs of intraframe processing algorithms are analysed and their parameters are evaluated, primarily the degree of parallelism. The architectures of functional-oriented processors based on homogeneous computing environments for ultrafast intraframe processing are described. The results of research and development of microelectronic implementation of such processors are presented.
Quick search of neighbour particles in molecular dynamics simulations
Authors: Novikov P L , Pavsky K V , Baranov A A
Published: December 2020

Quicksort algorithm as an assistant preliminary tool is proposed for acceleration of neighbour search procedure in the frame of molecular dynamics simulations. Simple estimations are made showing that the number of operations required to determine all the neighbours within a system of particles can be reduced by 2-3 orders of magnitude due to the preliminary sorting. Test molecular dynamics simulations carried out for virtual crystal structure containing atoms manifest 9-fold acceleration achieved by the modified algorithm.
About proof-search in intuitionistic natural deduction calculus using partial Skolemization
Authors: Okhotnikov Oleg
Published: December 2020

In this paper, automated proof search in single-conclusion sequential variant of intuitionistic and minimal predicate calculus is considered. In this algorithm, meta-variables and partial Skolemization are used. Theorems of soundness and completeness for the considered algorithm are proved.
Convolutional neural network approach to event position reconstruction in DarkSide-50 experiment
Authors: Grobov A , Ilyasov A
Published: December 2020

Neural networks are currently used in various fields of science and technology, as well as in experiments related to particle physics. DarkSide-50 is a two-phase (liquid and gas) argon TPC which has two main signals: scintillation in LAr (S1 signal) and electroluminescence in GAr (S2 signal) [1]. In the low-mass dark matter search only the more energetic second signal is used for position reconstruction [2]. As a result only events detected by seven central photomultiplier tubes are used for the analysis. Here we attempt to improve reconstruction using the convolutional neural networks (CNN).
Status of the Phase-2 Tracker Upgrade of the CMS experiment at the HL-LHC
Authors: Calligaris Luigi
Published: December 2020

The Phase-2 Upgrade of the CMS experiment is designed to prepare its detectors for operations at the High Luminosity Large Hadron Collider (HL-LHC). The upgraded collider, scheduled to start operations in 2027, will lead to challenging conditions in terms of data throughput, pile-up and radiation. For these reasons the tracker detector will be entirely replaced by a new detector, the Phase-2 tracker. We present the status of the design, test and validation of the components of the Phase-2 tracker, and its read-out, calibration, control, and data processing chains.
Performance and upgrade plans of the ALICE Photon Spectrometer
Authors: Blau D
Published: December 2020

PHOS is a highly granulated precision spectrometer, one of the two electromagnetic calorimeters of ALICE (A Large Ion Collider Experiment) at the LHC. It is based on scintillating PbWO4 crystals and is dedicated to the precise measurements of spectra, correlations and collective flow of neutral mesons, thermal and prompt direct photons in ultra-relativistic nuclear collisions at LHC energies. PHOS participated in LHC Run 1 (2009–2013) and Run 2 (2015–2018), during which a large amount of physical data were collected in pp, p-Pb and Pb-Pb collisions.

We present an overview of the PHOS performance during Runs 1 and 2 and plans for an upgrade for future LHC runs.
Application of Machine Learning methods for centrality determination in heavy ion reactions at the BM@N and MPD@NICA
Authors: Karpushkin N , Golubeva M , Guber F , Ivashkin A , Morozov S
Published: December 2020

Forward hadron calorimeters in heavy ion experiments are used to determine the centrality and orientation of reaction plane in nucleus-nucleus collisions. In BM@N and MPD@NICA experiments hadron calorimeters with a beam hole in the center will be used, which is motivated by high radiation doses at the BM@N and by the design of the MPD collider experiment. This feature makes it impossible to determine centrality from only the total energy deposition in the calorimeters. Therefore, an approach using machine learning methods was developed to solve the centrality problem. This approach uses information on the energy distribution of particles over the calorimeter surface. The report is dedicated to the description of the new approach for centrality determination. The results of applying the approach to the simulation data of the BM@N and MPD@NICA experiments will be shown.
Modification of hadron production in small and large systems observed by PHENIX
Authors: Mitrankova Mariia
Published: December 2020

Hadron production in p + p, p+A, A+A collisions gives possibility to look inside Quark Gluon Plasma, allowing to study its properties and characteristics. It is one of the main objectives for the high-energy nuclear physics. PHENIX has performed measurements of π
0, η, Ks
, K*, φ and ω meson production in p + p, p+Al, p(d,3He)+Au, Cu+Cu, Cu+Au, Au+Au and U+U collisions at top RHIC energies. This rich collection of data give opportunity for detailed studies of the cold and hot nuclear matter effects from small to large systems. The paper presents obtained spectra and nuclear modification factors and theoretical model predictions where available.
Organic-inorganic nanohybrids for low-powered resistive memory applications
Authors: Gogoi K K , Chowdhury A
Published: December 2020

Organic-inorganic nanohybrids consisting of mutually complementing conducting and semiconducting materials have received much consideration in the field of resistive switching (RS) memory devices. Herein, we report a simple and cost-effective hydrothermal method for the synthesis of reduced graphene oxide (rGO)-semiconductor (SC) nanohybrid materials by varying the semiconducting component. In this work, the sulfur based semiconductors such as ZnS, CuS and SnS are chosen owing to their unexploited nature in the field of resistive memory devices. The synthesized materials are analysed through optical and structural techniques in order to confirm their successful formation. The synthesized nanohybids are then dispersed into polymer matrices (PMMA) and the RS memory properties are studied through current-voltage measurement. The best result of low set/reset voltage (Vset/Vreset) ∼ – 1.10/+1.29 V, low set/reset power consumption (Pset/Preset) ∼ 4.80 × 10-5/1.16 × 10-4 Wcm-2 and high current ON/OFF ratio (ION/IOFF) ∼ 103 is exhibited by the rGO-CuS nanohybrid. Finally, a conduction mechanism based on the phenomenon of charge carrier trapping and de-trapping is proposed to explain the RS properties.
Upconversion enhancement of red-emitting Er3+/Yb3+ with silver nanoparticles codoped tungsten tellurite glasses
Authors: Jat Sunil , Jayaswal Y K , Ansari Ghizal F , Jain Ravi , Mahajan S K
Published: December 2020

The glasses system TeO2-WO3-Li2O containing Er-Yb and Ag nanoparticle (TWLEYA) has been prepared by the metal quenching technique. In the presence of Ag2O in these glasses, silver nanoparticles (AgNPs) is obtained by mean of reheat-treated 12h duration. XRD measurements of the heat-treated glasses confirm the growth of the crystalline phase and glass-ceramic nature of samples. Uv-Vis absorption spectrum demonstrated the characteristic transition of Yb3+ and Er3+ ions with local surface plasmon resonance absorption band of AgNPs arisen at 525nm and 650 nm. For heat-treated TWLEYA glasses under 980nm excitation show two main upconversion transition peak at 548nm and 657nm emerging from 4S3/2 and 4F9/2 states of the Er3+ ions, respectively. All AgNPs doped TWLEYA sample produced huge green contrary to red emission by 980 nm pumping. However, the red emission enhanced by two-fold factor has been measured for 0.7mol% of AgNPs in TWLEYA sample. For these glasses, red emission enhancement is gained by local field proximity of the Ag NPs. Further contribution of optimum 0.7 mol% AgNPs in TWLEYA glass and its emission enhancement of possible energy transfer from AgNPs to Er-Yb has been analyzed.
Fractional order β-Laplace integral transform
Authors: Gaur Amit , Agarwal Garima
Published: December 2020

We introduce a (new) generalized form of β-Laplace integral transform, fractional β-Laplace integral transform, or β-Laplace integral transform of fractional order. The β-Laplace integral transform of fractional order can be applied to functions which are fractional differentiable but are not differentiable. After review some literature on fractional analysis based on the modified Riemann-Liouville derivative, we define the fractional order β-Laplace integral transform, obtain some main properties, convolution property and formula for the inverse of fractional order β-Laplace integral transform.
Study of Navier-Stokes equation by using Iterative Laplace Transform Method (ILTM) involving Caputo- Fabrizio fractional operator
Authors: Yadav Lokesh Kumar , Agarwal Garima , Kumari Manjeet
Published: December 2020

This article arrangement with N-S equation containing the Caputo-Fabrizio differential operator of fractional order. The Iterative Laplace Transform Method (ILTM) has been applied to found numerical solution of time-fractional N-S equation in a tube with unsteady fluid flow in the Caputo-Fabrizio sense. The ILTM is an elegant coupling of transform of the Laplace and new Iterative method (NIM). This scheme provides numerical solution in the terms of power series with easily computable terms. It is observed that the solutions of N-S equations obtained by the ILTM rapidly convergent to exact solutions.
Communication Structures, its graph representation and decomposition possibilities
Authors: Mathew Jasmine , Rejikumar K
Published: December 2020

Communication networks are modelled using graph structures. The efficiency of a network can be determined using the parameters of the graph model. The article reviews the modelling of various communication networks, their graph parameters, classical topologies and their available properties.

If the communication is in one direction, the model is known as simplex model. Its graphical representation requires directed graphs, a kind of generalized graphs. The large networks become complicated for analysis because of having large parametric values. To overcome this difficulty more generalized graphs called hypergraphs are required.
Smart helmet system with accident safety gears and bike tracking mechanism using non IOT methods
Authors: Subbarayappa Shreyanka , Kempasatti Ramesh , Kulkarni Samarth S , Johari Shubhang
Published: December 2020

The road accidents across the world have been increasing every year. Due to this, safety of a rider has become a major concern. It is observed that bike accidents in south Asian countries are in majority as compared to other class of vehicles. Most of these bike accidents are due to rider’s negligence. The intension is to circumvent the negligence of the rider and fatal injuries. In this regard, the Arduino microcontroller system is developed which does not allow the rider to start the bike until the main rider and pillion rider wears the helmet. It is also necessary that the main rider is not drunk and is sober to start the bike which is detected in the helmet. In case of an occurrence of the bike accident, the concerned members of the rider and emergency services are notified with text message and real time location to avoid last minute casualties. If the rider exceeds the speed limit, audio warning alert will be given to the main rider through the speakers in the helmet. The provision for alternate method to start the bike is given to the rider in limited access to avoid misuse of the system in case the helmet is lost. The bike is made trackable in case of lost or not found.
Effect of substrate material on the performance of planoconcave patch antenna for 5G
Authors: Panda Ribhu Abhusan , Satapathy Priti Pragnya , Susmitha Subudhi Sai , Sagar Raghuvu Budhi , Mishra Debasis
Published: December 2020

In this article the design of a Plano-Concave patch antenna has been explored and reported. The effect of substrate material which include the dielectric with a specific dielectric constant has been analysed. Proposed shape of the patch is designed by subtracting a semi-circular patch from the conventional square patch .To analyse the effect of dielectric material on the performance of antenna, different materials with specific dielectric constant ( εr) like Silicon ( εr=11.7 ), Alumina92_pct( εr=9.2 ), FR4 Epoxy ( εr=4.4 ), RT Duroid ( εr=2.2) have been considered . The performance is considered for 5G LMDS application that includes 26.5 GHz to 29.5 GHz. The analysis has been done by considering the S-Parameter (Return loss <-10 dB), Antenna Gain, Directivity, Radiation Efficiency and surface current distribution. Table 1 provides the comparison of parameters for different substrate material.
Timing analysis journey from OCV to LVF
Authors: Rita Mahajan , Aru Sharma , Manish Bansal
Published: December 2020

In the present era, robust, reliable, and efficient SOCs are the need of the hour due to the rapid growth of IoT, networking, artificial intelligence, and many newer technologies. There is huge competition in the market to decrease the size of the electronic devices. All these market demands have put lots of pressure on silicon industries to accommodate more functionality on a single chip. As a result of this, with time, there is very fast shrinkage in the technology node. But this technology advancement comes with plenty of challenges. One of the primary challenges is undesired on-chip local variations (OCV) & its accurate modeling for timing analysis (STA). This paper discusses all the aspects of timing analysis and the evolution of different methodologies that shape timing analysis over the course of time. The methodologies to define margins for accurate timing analysis is the heart of accurate analysis at lower nodes. The paper will include an emphasis on how the timing analysis have moved from a global derate value to the architecture, condition-based derate value, used through all these methodologies. The paper will focus on the concept of all of the important methodologies and how they have evolved through time.
Low cost ANN based MPPT for the mismatched PV modules
Authors: Berclin Jeyaprabha S
Published: December 2020

Due to manufacturing dispersal, the photovoltaic (PV) panels of similar rating and manufacturer have distinctive characteristics in practical. As the maximum power point tracking (MPPT) becomes essential to optimally utilize the solar PV panel, distributed maximum power point tracking (DMPPT) is considered in this paper to follow the MPP of each panel. As the common MPP value is used in the existing DMPPT method to control all the panels, it fails to consider the uniqueness of each panel. By considering the uniqueness of each panel, the ANN based MPPT is implemented in this paper. As the ANN is trained using the actual characteristics of each panel based on the operating current, voltage and temperature, it is able to track the actual MPP. Due to the solar irradiance free MPPT, the costly pyranometer is not required in the actual PV system for MPPT. It reduces the cost of the system and also provides the interruption free tracking due to its independent nature on Voc
and Isc
values. Also, because of the looping free behaviour of the proposed algorithm, it is capable of following the MPP at rapidly varying condition. The proposed technique and the verified outcomes are discussed here in detail.
Simulation and analysis of T-PUC9 inverter fed single phase induction motor application
Authors: William Christopher I , Davis Delsa , Infanto Robbin P , Jovita Dixit S , Asif Iqbal A
Published: December 2020

This paper presents the simulation and analysis of a Nine-Level T-Type Packed U-Cell (T-PUC9) Inverter fed single phase Induction Motor. This inverter includes a T-type neutral point clamped (NPC) pole, two identical DC voltage sources and a one half-bridge module. It employs a Multiple pulse width modulation (PWM) scheme for generating the pulses for all the eight switches to synthesis the desired nine level voltages namely 2Vdc, 1.5Vdc, Vdc, 0.5Vdc, 0, -0.5Vdc, -Vdc, -1.5Vdc and -2Vdcwhich resembles a nearly sinusoidal wave owing to the rise in the number of steps. Due to its low-level harmonic distortion in the output it is used in industrial applications. The simulation model of the presented inverter has been developed for a single-phase induction motor application for a two identical DC voltage sources of 110V each using the MATLAB Simulink platform. The theoretical predictions and the performance of the Nine-Level T-Type Packed U-Cell (T-PUC9) Inverter fed single phase induction motor have been successfully validated with the help of simulation results.
Performance analysis of reduced switch ladder type multilevel inverter using various modulation control strategies
Authors: Vishwajith N , Nagaraja Rao S , Sachin S
Published: December 2020

Multi-Level Inverters (MLI) are finding applications in UPS, drives, Grid interfaces because of dynamic output voltage control capability. In this paper a nine level single phase MLI topology with optimized switches is proposed. Increased output level helps in smoothening the output waveform along with reduced THD and eliminates need of filtering circuits. Proposed Reduced Switch Ladder Type MLI (RSL-MLI) topology consists of four DC power sources and nine switches for single phase inverter. When compared to conventional MLIs for same nine output levels, this topology has less number of devices making it cost effective. Both, high frequency switching pulse width modulation and fundamental frequency switching modulation methods are used for simulation of proposed nine level RSL-MLI topology. Output voltage waveform, THD are analysed using Simulink and equated to validate the performance of planned topology. Further, simulation is carried for five and seven levels of output voltages and THD are analysed.
Coaxial fed defected ground plane square apertures loaded patch antenna
Authors: Singh Ashish , Shet Krishnananda , Prasad Durga , Rao Satheesh , Shetty Ramya
Published: December 2020

This research paper deals with the design of coaxial fed patch antennas with defected ground planes and square apertures. This antennas work for different applications applications such as Bluetooth, mobile communication, and biomedical applications.acceptable Specific Absorption Rate. It has resonating frequency at 2.45 GHz and bandwidth is 20%, so antenna has wide range of applications near 2.4 GHz bandwidth. There is slight deviation in theoretical result this is because of assumption made while calculation of S11(dB) such as slots and notches on the patch but actually it is square ring like structure.bandwidth.
Design and analysis of quad ridged horn antenna for high gain application
Authors: Barapatre Urvi , Panchal Suman , Rathod Jagdish M , Panchal P H , Parikh Kush
Published: December 2020

This paper discusses the design consideration of a Quad Ridged horn Antenna (QRHA). The different ridge profiles that are inserted in the horn have different significant effect on the horn performance that are discussed in the paper. The paper is based on the QRHA that can be used as a Standard Gain Horn Antenna. The QRHA is simulated using HFSS software and the results obtained are mentioned.
Active Vibration Absorber for Superharmonic Resonance Condition
Authors: Mohanty S , Dwivedy S K
Published: December 2020

The present paper, analyses vibration suppression of a nonlinear single degree of freedom (SDOF) spring-mass-damper system under hard harmonic excitation by attaching a piezoelectric based active dynamic vibration absorber (ADVA). The host structure consists of spring with cubic nonlinear stiffness and negligible damping. The acceleration feedback is used to provide the actuating force through ADVA on the vibrating host structure. The hard harmonic excitation on the host structure induces superharmonic resonance condition i.e. when excitation frequency nearly matches one-third of the natural frequency of the host structure. The optimal tuning ratio and damping ratio of the vibration absorber are considered to depend upon the actuating force so that one can actively tune the operating frequency of the ADVA. The method of multiple scales (MMS) is used to obtain the reduced equations to study the frequency response of the system. The analysis is carried out by studying the effect of active force and cubic nonlinear stiffness on the responses of the host structure. The results obtained by MMS are compared numerically showing good agreement.
Miniaturised multiband e-shaped structure microstrip antenna for satellite communication
Authors: Kannadhasan S , Nagarajan R
Published: December 2020

Microstrip antenna technology has been designed of an E-Shaped antenna structure for Ku-band satellite communication application such as broadcasting, remote sensing and space communication. The proposed E- Shaped structure antenna is used to operate the frequency bands, 2.39 GHz and 2.44 GHz with a return loss less than -20.4 dB. The concept of microstrip based lossy characteristics impedance; hence the effect of high frequency is included in the procedure The proposed E-Shaped structure has been designed with dielectric FR4 epoxy substrate of dimension (60mm X 50mm), dielectric constant €r = 4.4 and height = 1.8mm and it is fed by coaxial cable 50 Ω matching impedance with the bandwidth of 480 MHz and 640 MHz. The Proposed E-Shaped structure which operates the resonating frequencies in various wireless communication and satellite communication applications. The proposed antenna structure parameters have been analyzed and simulated by using HFSS tool. The simulated results for the proposed antenna are in good results for VSWR, radiation pattern, Gain, Return Loss and Efficiency
Modelling the thermal behaviour of GFRP reinforced concrete beams subjected to elevated temperature by standard fire exposure
Authors: Mathews Mervin Ealiyas , Manas Yellapragada Sai , Kiran Tattukolla , Anand N
Published: December 2020

The effective implementation of a quality fire safety model of Reinforced Concrete (RC) structures rely on the reliable numerical simulation tools of RC exposed to elevated temperature. To assess the thermal behaviour, models were created for Glass Fibber Reinforced Polymer (GFRP) RC beams exposed to fire loads following ISO 834 standard fire curve. Three-dimensional (3D) Finite Element (FE) models were developed. Appropriate material data is used to model the thermal and structural behaviour of GFRP reinforced beams. Different cover to concrete and diameters of bars were used as variables in the model. Temperature-dependent material properties were used for modelling the flexural behaviour of the reference and the temperature exposed GFRP beams. The developed model with the appropriate material properties simulated the flexural behaviour of beam with GFRP and steel bar.
Characterization study on recycled coarse aggregate for its utilization in concrete - A review
Authors: Jagan S , Neelakantan T R , Reddy Lakshmikantha , Gokul Kannan R
Published: December 2020

Industrialization and urbanization are two major factors that contribute to the scarcity in construction materials furthermore leading to dependency on alternative materials in construction. Consequently, rehabilitation and retrofitting of structures leads to the generation of Construction and Demolition(C&D) waste which is to be effectively reutilized/disposed. Such C&D wastes can be reutilized as coarse aggregates in concrete termed as recycled aggregate concrete to achieve sustainability in construction. Presence of adhered mortar on the surface of recycled aggregates tends to reduce the quality of recycled aggregate concrete. This paper reviews the statistical data on the generation of C&D wastes around the globe and its percentage of reutilization with a comparison on physical characteristics of C&D wastes with natural coarse aggregate in concrete. Comparative studies on the physical characteristics of recycled aggregates performed by various researchers embark with conclusive remarks to specify its limitation on utilization in structural applications due to the presence of adhered mortar on its surface.