bluuebunny/crossref_metadata_2025_split huggingface dataset:
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.
Effect of nano TiO2-epoxy composite in bond strength and corrosion resistance of rebar embedded in micro-silica modified concrete
Authors: Ramganesh V , Ananth Kumar M , Mini KM , Vignesh Vaishno , Karthikeyan R 
Published: December 2020

Abstract
One of the significant drawbacks of RCC structures is Corrosion. It is a well-known term used to describe numerous interactions between a material and its surrounding environment resulting in degradation within the material properties. Reacting with ambient oxygen can cause the material to degrade by forming a more chemically stable form of oxides called Rust. A detailed literature study about the recent advances in the area of corrosion resistance of reinforced concrete has been done using nano-materials. Nano-materials can be deemed fit to be used in cement and concrete manufacture and have a wide range of applications in the civil industry. Compressive strength and ductility of concrete can be improved by blending Nano-materials in concrete. Leads to producing a very dense concrete and Decreases permeability of the concrete by micro filler effect. In the present study, nanomaterial is used in the preparation of coating material on the reinforcement bar. Higher opacity, the interaction between coating and surface, and higher durability of the coating can be achieved by adding nano-material. Different percentages of nano-TiO2 (0.5%,1%,2%) mixed with epoxy are varied to find the percentage, which gives the least rate of Corrosion. For this purpose, the specimens coated with nano-TiO2 epoxy composite are placed in two mediums such as 3.5% NaCl solution and 1M H2SO4 solution and studied the performance of corrosion resistance for every 15-day interval using LPR, Tafel plot and Electrical Impedance Spectroscopy(EIS).Characteristic properties like topography, composition, and surface morphology are studied using SEM, FTIR, and XRD analysis. To increase the mechanical properties of reinforced concrete, so industrial by-product micro-silica has been added to the cement mix. Reinforced cylindrical specimens were cast and were tested for bond strength. For micro-silica replaced concrete mix, destructive tests like compressive strength test and tensile strength tests were conducted
Investigating the effect of biological material on the property of concrete
Authors: Kadapure Santosh Ashok 
Published: December 2020

Abstract
Biomineralization is an innovative technology adopted in the area of construction field. Biomineralization method involves use of biological material to improve the property of the concrete structure. The present study investigated the effect of prepared biological material of Bacillus sparecisus strain introduced into fly ash concrete as a new approach on its durability and mechanical property. Mechanical and durability property of bacterial blended fly ash concrete were studied at cell concentration of 105 cells/ml with varying concentration of bacterial solution to water. Test results revealed that, in comparison with conventional samples, those containing alkaliphilic endospore-forming bacteria material cured in tap water, recorded increase in compressive strength up to 30 % and decrease of durability property to 30 %. The ratio of bacteria solution to water played important role in improving the properties of concrete. At higher ratio, calcite precipitation by bacteria resulted in improvement of properties of concrete. Scanning electron microscope and XRD tests were performed to confirm the formation of calcite in the opening spaces of concrete.
Application of time and motion study to increase the productivity and efficiency
Authors: Prakash Chandra , Prakash Rao B , Shetty Dheeraj Vishwanatha , Vaibhava S 
Published: December 2020

Abstract
The productivity and efficiency in any construction is always a challenge. Due to various factors the efficiency of men and machine gets reduced hampering the productivity. The purpose of this study is to highlight the benefits of time and motion study employed in construction sector. Time and motion study and work sampling has been employed to measure the productivity of the various construction activities and the paper discusses its application to the various phases of erection of steel structure such as installation of purlins, installation of primary beams and installation of secondary beams on the arrival slab of an airport. The parameters such as efficiency, productivity, tool time, support time and idle times are observed. Motion corrections and time corrections are applied. It is expected that employing lean concepts to construction will help in increasing productivity and reduce risks. After first week of observation and then employing time and motion study corrections, an increase of 37.95% is observed in terms of efficiency, an increase of 218.03% is observed in terms of productivity and an increase of 93.25% is observed in terms of tool time. The idle time showed a decrease of 40.24%.The results are highly promising and hence the management of construction industry need to consider the application of time and motion study not only from the point of view of enhancing efficiency and resource usage, but should also discuss the soft side of employee psychology.
Concrete support structures for small wind turbines
Authors: Michalek Jaroslaw 
Published: December 2020

Abstract
Small wind turbines (SWT) generate electricity up to several dozen kilowatts. They can be divided into turbines with a horizontal axis of rotation (Horizontal Axis Wind Turbines) and turbines with a vertical axis (Vertical Axis Wind Turbines).The paper discusses design issues related to various types of wind turbines, and lays down general principles for the selection of support structures for small wind turbines (SWT) with a horizontal axis of rotation. The possibilities of using E-type spun prestressed-concrete poles used in medium voltage overhead power lines as SWT supporting structures are presented and discussed with regard to technical benefits of their application.
A research on strength improvement of clay with mine tailing
Authors: Veena Vijayan L , Prakash Arul Jose J 
Published: December 2020

Abstract
Tailings seem to be the materials left over after the separation process of the desirable fraction from the uneconomic fraction of an ore. A vast quantity and diversity of mine tailings are created everyday around the world. The tailings very often contain heavy metals, chemicals and toxic substances that may disperse into the ecosystem and endanger public health during mineral processing. Those mining waste should be managed properly. To assess these problems, it is necessary to ascertain the appropriate engineering properties of the tailings. A series of experimental studies were performed to determine the geotechnical properties of mine tailings to evaluate the applicability of these materials for construction purposes to undertake this project. The specific index and engineering properties of the soil were calculated by various laboratory experiments. Chemical analyzes were carried out, too.
Evaluation of the effects of soil structure interaction on a multistorey rc building
Authors: Deepashree R , Kavitha S , Mamatha P G , Vishal B V 
Published: December 2020

Abstract
when a structure undergoes seismic excitation, the displacement caused in the structure and the ground are not independent of one another, this dependency of each other causes noticeable changes in the structure. In order to study this interdependency, a phenomenon called soil structure interaction (SSI) comes into existence which is been neglected during design process but omitting it leads to unsafe design. Henceforth it’s important to consider the effect of SSI although its effect is negligible for buildings that are low rise. In the current study 6 models of G+13 multi-storey symmetrical RC building with storey height 3m is modelled using ETABS which is assumed to be located in Hard-soil, Medium-soil and Soft-soil of zone-IV is subjected to response spectrum analysis. The structure is analysed without SSI and also the behaviour of the structure is studied by considering SSI effect using spring elements. The variation of systematic parameters such as storey displacement, storey drift, Storey shear, base-shear, natural period, Storey stiffness and overturning moment has been studied and compared. It is observed that response of the structure is higher under SSI condition and soft soil is more critical, it’s important to consider the effects of SSI during design process.
Social media security threats investigation and mitigation methods: A preliminary review
Authors: Singh Mandeep , Verma Chaman , Juneja Pamela 
Published: December 2020

Abstract
Recent advancement of data collection and coupled statistics, big data became a significant issue in various research areas like: Machine learning, data mining, social networks, artificial intelligence, etc. Social networking is used as a platform for various applications like: government, business, educational, political, dating and matrimonial, etc. Like each and every platform, social networking too has its own set of pros and cons. We examine the types of posting on social media websites and influence of posting data and privacy concerns of Facebook and twitter users. This study indicates the different concerns of users regarding posting information and its influences of user voiced privacy concerns. It is beneficial in fields like: education, advertisements, online shopping but people get addicted to social networking, its time consuming in various issues and can be misused for cybercrimes. We’ve discussed the e-government objectives of using social media. Social networking is also vulnerable at different stages and attacked in several ways that includes evil twin attack, virus attack, phishing attack, account hijacking, data breach attack, fraud and scams. Site monitoring, developing security policies, educating users and training programs, updating software, archiving, media contents are several mitigation techniques are used to reduce the effects of cyber-attacks.
“FRIENDLY CHAT”- A chat application with multi-headed classification models for identifying abusive levels and their comparative study
Authors: Parkavi A , Sowmya B J , Pushpalatha M N 
Published: December 2020

Abstract
An application that tracks the use of offensive and vulgar language on chats on social media networks in order to prevent users from becoming disrespectful may play a role in changing how users interact. "Friendly chat" is a play on a community messaging program, which allows users to address a range of topics that are totally unregulated. Once things start heating up a user may become abusive towards other users, the application can disperse the situation quickly by implementing protective measures to stop the abusive user in his tracks. Abuse is however not the only type of "toxic" material to which a user is exposed when communicating with other users. Hatred of identification, intimidation, and other forms of obscenity may also become a part of the discussion. To identify a post as toxic, we need to refer to a reference, using the "toxic comment" dataset consisting of a large number of Wikipedia comments which have been rated by human critics who classify the comment to fall under one or more of the above-mentioned categories. Integrate this model in the real time data that we receive from “Friendly Chat” to classify a user into one or more of these categories. Use techniques of classification and machine learning such as Naïve Bayes, LSTM and Binary relevance and chain classifiers models. Our application’s capable of detecting abusive users.
RBJ25 cryptography algorithm for securing big data
Authors: Rajaprakash S , Bagath Basha C , Muthuselvan S , Jaisankar N , Singh Ravi Pratap 
Published: December 2020

Abstract
Cryptography is essential tool to protect data, information in computing system. In worldwide, billions of people using this cryptography methods in daily basis because It used the protect data. By and large the size of information imparted in web applications is developing and is in Peta-bytes and Exa-bytes. The customary security frameworks can't give successful insurance and confirmation to these sorts of informational collections. To over this issue in this work we have proposed a new cryptography algorithm RBJ25 with the matrix order N. This proposed algorithm contains three parts. In the first part based on the column operation of the matrix. In the second part secrete key generation and in the last part has five sub part to protect the information which will be discuss in detail in implementation part. Similarly in the decryption has three reverse parts. Finally, this algorithm is implemented and compared with traditional algorithms like AES and ChaCha20.
Compact slotted multiband patch antenna with defected ground structure for wireless communication
Authors: Guruva Reddy A , Madhavi M , Rakesh Kumar P 
Published: December 2020

Abstract
A novel compact Slotted Microstrip patch antenna with Defected Ground structure (DGS) operating for Wireless and satellite communication applications is proposed and investigated. This proposed antenna generates six different resonances operate at 3.3 GHz (WLAN), 5.1 GHz (WiMAX), 5.9 GHz(Satellite Application), 7.12 GHz(Earth Exploitation Satellite), 10.4 GHz(Mobile & fixed Radio location) and 13.1 GHz(Satellite Application) while maintaining overall compact size of 32x32x1.6 mm3 using a FR-4 substrate commonly available with a permittivity of er = 4.4. The proposed microstrip Patch Antenna (MSPA) consists of a square radiator in which a Log Periodic slot is etched out along with square defects on ground surface and a Microstrip feedline. The slotted patch with DGS modifies the total current path there by making the antenna to operate at six useful bands. The structure shows the impedance bandwidth of3%, 3.3%, 5.2%, 14.7%, 5.6% and 9% with gains 3dB, 3.8dB, 2dB, 1.8dB, 3.1dB and 4.82dB respectively. The antenna performance is analyzed using various s parametric optimization studies, field distributions and currents. Excellent agreement is obtained between measured and simulated results.