bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the application of UAV airborne transient electromagnetic in the detection of shallow sliding surface
Authors: Wang Yong , Zhai Songtao , Zhang Xiaopei , Du Lizhi
Published: February 2021

In complex terrain conditions, how to achieve fast and efficient detection of the sliding surface is primary issue for the shallow landslide hazard investigation. In this paper, the UAV (Unmanned Aerial Vehicle) airborne transient electromagnetic method of Lengshui landslide in Fujian province was detecting a sliding surface. The comparison and analysis of resistivity data and borehole data show that the consistency of resistivity data and borehole geological stratification is good, and the three-dimensional distribution characteristics of the landslide can be inferred from resistivity data. Also, this paper determines the acquisition parameters of UAV airborne transient electromagnetic flight state and array types through experimental research, which has certain practical reference and guidance significance.
Three-dimensional electromagnetic method in shallow surface exploration in complex piedmont belt
Authors: Hu Zuzhi , Liu Xuejun , Wei Qiang , Yang Hui , Li Qing , Tao Deqiang
Published: February 2021

In the complex piedmont area, the quality of seismic data is generally poor, and it is difficult to build the shallow velocity model, which leads to the inaccurate determination of the stratigraphic and structural positions. The combination of seismic and non-seismic exploration is an effective way for oil and gas exploration in complex piedmont belt. In the northwest of Sichuan Province, the joint exploration of three-dimensional audio-magnetotelluric (AMT) and transient electromagnetic (TEM) is carried out. The transient electromagnetic data is used as static correction for audio-magnetotelluric data, and the AMT data is used to detect the shallow surface structure within 1.5km buried depth. The three-dimensional geoelectric model of the study area is obtained by using AMT three-dimensional inversion, and the geological structure interpretation is carried out by combining well logging with the statistical data of rock physical properties, which provides a basis for seismic building the shallow surface model.
Application of wavelet multi-scale analysis in the separation of aeromagnetic data potential field
Authors: Sun Hailong , Liu Yingxin , Wei Zheng , shi Xu , Wang Yahong , Lu Lichun
Published: February 2021

The aeromagnetic data obtained in the field is a comprehensive reflection of all geological bodies in the ground. When interpreting and inferring a field in different depths, it is necessary to separate the anomalies. As a widely used mathematical transform, wavelet transform introduces the concept of multi-scale analysis, which can effectively separate the aeromagnetic anomalies, clearly reflect the abnormal forms in different depths, and effectively. It improves the recognition accuracy of aeromagnetic data and provides a solid foundation for the processing and interpretation of aeromagnetic data.
Suggestions on Using Three-dimensional Models to Transform Mining Villages into Smart Villages in the Context of Big Data-Taking Songshumao Molybdenum Mining Area in Xingcheng, Liaoning as an Example
Authors: Li Zhongtan , Xue Linfu , Liu Jiwen
Published: February 2021

The construction of smart villages is the trend of future rural development. This article uses Songbei Village as an example, using unmanned aerial vehicle (UAV) to achieve efficient and fast aerial photography to establish a three-dimensional (3D) model of the area. After the mining, the current situation of Songbei Village was analyzed, and some suggestions were provided for the economic development and rural layout of Songbei Village to promote the construction of smart villages in Songbei Village.
Prediction of oil and gas distribution in K area by inheritance classification
Authors: Shi Yanling , Wang Yongtao , Liu Xuejun , Yun Zhineng , Xu Shichao , Yang Shujiang
Published: February 2021

Inheritance classification is an interactive multi-attribute pattern recognition method. In the interpretation of geophysical data, combined with the advantages of multiple attributes of gravity, magnetic and electromagnetic in the identification of special lithologic bodies, complex reservoirs and other targets, the heritance classification method can be used to qualitatively predict the distribution of favorable target. Multiple data complementing each other and multi-attribute intelligent classification can effectively reduce the multiple solution of geological interpretation.
The latest development of Marine controllable source electromagnetic transmitter
Authors: Wang Meng , Ming Deng , Li Xiancheng , Zhang Ziyang , Yue Haitao , Zhang Tianyu , Duan Nini , Ma Xiaoxi
Published: February 2021

Marine Controlled-Source Electromagnetic (MCSEM) methods have been recognized as an important and effective tool in accurate analysis of shallow electrically resistive structures such as oil, gas and gas hydrate. However, the MCSEM performance in the deep ocean is strongly affected by the hardware design, especially the transmitter system. We have developed a series of deep-towed MCSEM transmitter systems. The design of the transmitter system meets serious challenges such as long-distance and high-voltage transmission, water sealing under high-pressure, the real-time monitoring of seafloor status information 4 km below the sea-surface. In this paper, we present the latest research and development of the MCSEM transmitter systems by presenting key technologies in hardware development and implementation details. The deep tow transmitter system consists of three parts: the deck unit, the deep tow cable and the deep tow unit, which can transmit the high frequency and high power to the seawater, maintaining a high-speed data communication with control center which in the ship’s lab. We conducted several experiments in the South China Sea from August of 2010, to November of 2019. The results showed that the development of the transmitter is successful and it can be used for oil, gas and gas hydrate exploration as an effective source.
Application of Self-Propelled Light Electro-Hydraulic Servo Vibrator Vehicle: A Case of Chaganhua Town, Jilin Province, China
Authors: Du Lizhi , Wang Yanlong , Wang Yuan , Wang Yong , Zhang Guoqiang , Zhang Xiaopei
Published: February 2021

In order to test the performance of the LVIB-15 self-propelled light electro-hydraulic servo vibrator developed by Jilin University, a comparative test was conducted on different excitation conditions of a hard pavement and sandy road in Chaganhua town, Jilin Province, China. The optimum scanning frequency was determined by comparing different scanning frequencies. And seismic exploration with a length of 1.2 km was completed. The results show that the reflections were very clear and had good consistency. The signal-to-noise ratio of seismic signal was very high, reaching a reflector of 1400 ms, proving that the seismic data of vibroseis had high accuracy and reliable results and it meets the demand of geophysical prospecting.
Wireless Energy-Efficient System Based on the Directed Diffusion Routing Method for the High Density Seismic Array Survey
Authors: Tian Ruyun , Wang Longxu , Zhang Junjie , Yang Hongyuan , Zhang Linhang
Published: February 2021

High-density seismic array survey has attracted high R&D interest in geophysical methods in recent years, and it is an advanced seismic observation technology which is of great significance in oil and gas resource detection and underground space exploration. However, designing a portable sensor node that prolongs the lifetime and equips wireless monitoring system to improve construction efficiency has been still a challenge. In this paper, a portable energy-efficient wireless sensor node and a wireless communication system that content them with complex terrain, large-scale and reliable transmission is proposed to tackle the restrictions of high-density seismic array survey. This paper proposes a directed diffusion routing method which performs the energy-efficient design by maintaining the link gradient and the ability of automatic power adjustment. In addition, when the sink node initiates an instruction, it quickly covers all nodes and receives the response from the nodes. Then, a series of simulations and experiments are carried out for verification. The experiments show that the equivalent noise of the sensor node is 0.8μV@500Hz, which suggest good performance among the existing sensor nodes. Simulation results and performance analysis validate that the effectiveness of the proposed routing method can maintain the network with only 20mW at autonomous working mode. The field measurement results indicate that the wireless multi-hop energy-efficient system based on the directed diffusion routing method is suitable for the high-density seismic survey.
Numerical modelling for a simplified bridge pier model under high-speed train passage over the bridge
Authors: Wang Zhiyang , Chen Chaopu , Li Youming , Liu Hong , Bai Wenlei
Published: February 2021

In this work, we simplify a moving high-speed train as combination of a series of the axe loads from the front and rear bogies of cars. We build a simplified bridge pier model, as a result, train source expressions with cars moving on land and bridges are given respectively. Considering that the piers are inserted into the ground at a depth of a few tens meters and reach the bedrock. When the high-speed train passes the piers, the piers will appear oscillating motion which is subjugated by the ground, and this oscillating motion is relative to the microstructure interactions of subsoil and bedrock in the frame of the generalized continuum mechanics theory. Hence, we derive the elastic wave equations based on the modified couple stress theory to perform numerical modelling for a simplified bridge pier model under high-speed train passage over the bridge. Based on the wave equation and the train source expressions, a theoretical seismogram of a moving high-speed train with 16 cars on the bridge are obtained. Compared with the real data recorded when a high-speed train passed the piers in Dingxing County, some conclusions are drawn.
Robust cross-correlation functions of high-speed rail system
Authors: Bao Tiezhao , Ning Jieyuan , Zhang Xianbin
Published: February 2021

The vibration propagating along the railway direction is extracted by cross-correlation method (CCM). Given two stations both beneath the railway viaduct, robust cross-correlation functions (CCF) can be obtained by stacking those of different trains. The robust CCF can be used as characteristic quantities of the wave field generated by high-speed rail (HSR). These quantities have potential to monitor the structural changes of HSR system.
+2.5% Improvement in generation utilizing Anti soiling modules based on DSM technology
Authors: Verma Rajat , Mahajan Amresh , Pathak Prem
Published: February 2021

Accumulation of dust on solar modules decreases the transmittance of photovoltaic glazing, resulting in both deteriorated efficiency and daily energy losses. Actually, the soiling phenomenon in PV systems has been shown to be responsible for a medium- and long-term yield reduction of up to 16% over the first year of outdoor exposure [1].The most prominent origin of dust is driven by wind and soil particles from the ground surface. All over the planet, the properties of dust due to geological, topographical, and environmental ambiences such as relative density, particle structure, surface effects, and vapour content differ from one location to another. In the present study, an exploration of the energy gain observed by Photovoltaic modules coated with DSM Anti-Soiling coating (ASC) installed at 150 MW solar power plant in Andhra Pradesh is presented. The experiment for the analysis of the generation data started on 6 September 2018. Four different slots, one with DSM ASC and the rest with an anti-reflective coating (ARC), with equivalent DC connected load are chosen for analysis. The washing cycle was maintained at an interval of 10 days. The study shows that the modules with ASC generate +2.5% more power than the modules with ARC.
Single-mode optical fibers coupling: Study of the field of view
Authors: Shaker Lina M , Osamah Sara , Al-Amiery Ahmed A
Published: February 2021

Single mode Fiber (SMF) is commonly used in long distance applications as in optical communication. Coupling of the laser beam into SMF core to get high coupling efficiency is a challenging task in practice. The aim of our work is to study the impact of the field of view on the coupled light beam, taking into account well designed coupling lens to be sure that the focal spot has matched to the mode of propagation.Here in this article, a conical lens of 1.5 refractive index was used for light coupling process. The used criteria at HeNe laser of 0.5438 nm wavelength showed a degradation in the output signal due to generated distortion as the field of view increased from 0 to 6 degrees.
Performance evaluation of a 200 kWp grid tied solar power plant
Authors: Rajan K K , Aruna B
Published: February 2021

Grid tied solar power plants are found to be very adaptable for academic institutions as the load profile almost matches with the generation profile. For the academic institution under consideration, optimum capacity of the solar power plant is arrived at as 250 kWp, based on studies carried out. Since the institution was already having a plant of 50 kWp, it is decided to augment it with another solar plant of 200 kW capacity. The normal power supply available from the utility was not very reliable, which leads to frequent power failures. Hence a 200 kVA capacity Diesel Generator (DG) was provided for standby power requirement. An automatic power factor control (APFC) unit is also provided to improve the power factor of the system. During commissioning, the performance of the 200 kWp solar power plant was assessed based on the measurement of various parameters at site and were compared with the standard specifications. Integrated operation of the system was carried out and few operating difficulties were faced. In this paper, performance evaluation test results of 200 kWp solar plant, experience in integrated operation, the difficulties faced and the measures adopted to rectify them are discussed.
Implementation of Sobel filter using CUDA
Authors: Akasapu Akshita , Sailaja V , Prasad G
Published: February 2021

The Sobel filter is an edge detection filter that results in highlighting and focusing the edges. It is used for extracting the image gradient and contours in image processing applications. The data sets we are using in the paper are PGM and TIFF images with different rows and column pixel dimensions. The sobel filter operations used are implemented in C and CUDA programming language and the time taken for the operations in the serial and parallel platforms respectively are analyzed.
Improved progressive collapse resistance of irregular reinforced concrete flat slab buildings under different corner column failures
Authors: Garg Suyash , Agrawal Vinay , Nagar Ravindra
Published: February 2021

As the flat slab building with irregular geometric configurations is commonly designed to advance urban development and for architectural demands, its behaviour to resist progressive collapse must be examined. The building's progressive collapse occurs when one or more vertical structural load-bearing elements such as columns are removed due to an extreme load caused either by natural or manmade hazards. The present analytical research examines the failure criteria and improvement in the progressive collapse resistance of five and ten-storey irregular R.C flat slab building by incorporating perimeter beams along with strengthened perimeter columns in the building. The progressive collapse study is conducted by removing different corner columns on the ground floor as per the GSA guidelines (2003) and assessing the spread of damage. Static analysis is performed using the structural analysis program ETABS 2016. For each case, the results have been taken in terms of demand capacity ratio (DCR) at critical sections and, chord rotation and joint displacement at locations of removal of columns. The results showed that the presence of strengthened columns provides sufficient stiffness and the perimeter beam provides load paths for the building's gravity loads, thus making it resistive to progressive collapse under column failure.
SCPI based integrated test and measurement environment using LabVIEW
Authors: Aravind Balaji B , Sasikumar S , Ramesh K
Published: February 2021

Test and Measurement processes play a vital role on the quality of hardware functionality testing. Automating these processes provides a better reduction in “time to market” and is more concerned on achieving higher test coverage area when it comes to mass production. Functional testing deals with the observation on the characteristics of the hardware to determine whether it replicates the needs for which it was actually designed. This can be achieved using set of Test and Measurement Instruments which can replicate the environmental condition in which the hardware is to be deployed. This paper provides an environment to integrate set of measurement instruments in a single platform (LabVIEW) and automate the measurement control using command language know as Standard Command for Programmable Instrumentation (SCPI). Script based control commands provide an easy configuration and remote control of instruments. And also programming interface control using Virtual Instrument Software Architecture (VISA) to control instruments using Ethernet and USB protocol.
Design and analysis of near infrared high sensitive metal-insulator-metal plasmonic bio-sensor
Authors: Ben salah H , Hocini A , Melouki N , Khedrouche D
Published: February 2021

In this paper, a high sensitivity metal-insulator-metal (MIM) waveguide based plasmonic sensor, coupled by a hexagonal ring resonator is proposed. The sensing characteristics of the device are analyzed by the finite-difference time-domain (FDTD) method embedded in the commercial simulator R-Soft. From results, there is a linear relation between the material’s refractive index and its wavelength resonances. Moreover, the maximum linear sensitivity is S = 1743 nm/RIU for the second mode and it is S = 836 nm/RIU for the first mode, its corresponding sensing resolution is 5.73 × 10−6 RIU for mode 2 and 1.19 × 10−5 RIU for mode 1. The proposed sensor can be implemented in high performance nano-sensors and bio-sensing devices. The positions of transmission peaks can be easily manipulated by adjusting the inner side lengths of the hexagonal ring resonator, making this structure a dynamically controllable band pass filter. In addition, introducing another small hexagonal ring within the base resonator decreased the full width of half maximum (FWHM) of the resonance peak.
Synthesis and characterization of PVA/sPTA proton exchange membranes for fuel cell applications
Authors: Gomaa M M , Elsharkawy Y S , Abdel-Hamed M O , Abdel-Hady E E
Published: February 2021

Using the casting method, proton exchange membranes PEMs for fuel cell were prepared by thermal cross-linking of polyvinyl alcohol (PVA) with sulfophthalic acid (sPTA). The membranes were prepared with different cross-linking temperatures with thickness ranged between 100 to 150 μm. The prepared membranes were characterized by different techniques such as ion exchange capacity, thermal analyses, water uptake and proton conductivity. The prepared membranes showed proton conductivity between 8.46-32.7 mS/cm. Increasing the cross-linking temperature increased the cross-linking density, resulting in an enhancement in the tensile strength and thermal stability of the prepared membranes. The membrane hole sizes were obtained using positron annihilation lifetime spectroscopy (PALS) measurements. Cross-linked PVA/sPTA membranes showed a strong correlation between the free volume hole size with the mechanical stability and methanol permeability of the membranes.
Optical properties of one-dimensional photonic crystal and light absorption enhancement in planar a-Si:H solar cell
Authors: Sadoun B , Mouetsi S , Hocini A , Hocini A
Published: February 2021

The generation of the photovoltaic has intensified over the last decade, moving from the most basic applications based on elementary devices to one of the most important applications of energy. Photonic Crystals (Ph.Cs) are very promising systems for applications in the field of electromagnetic waves and for real achievements in microwaves field. This particular property of the Ph.Cs offers the possibility of the control of light propagation in an increased way, and thus makes possible to consider many applications in nanotechnology and photovoltaic field. The a:Si-H is a very attractive material for simulation and experimental applications, when deposited in thin layers, it has an efficient refractive index. The Plane Wave Expansion (PWE) method was used to assess the band gap of the structure, the Rigorous Coupled-Wave Analysis (RCWA) method integrated in RSoft CAD Software was used to calculate the optical properties, integrates with thin film structure of the solar cell with Ph.Cs. The one-dimensional optical properties of photonic crystal with the absorbent layer of photovoltaic cell on both hydrogenated amorphous silicon (a:Si-H) and silicon (Si) are studied in this paper in order to enhance the yield of the absorption of light on a solar cell with an efficiency geometrical parameters.
Comparative analysis results of the homogenization of nanosuspensions using ultra-jet processing method
Authors: Htet Kyaw Myo , Galinovskiy A L , Barzov A A , Soehnlein J
Published: February 2021

This work discusses the urgent problem of finding new highly effective dispersion methods for suspensions prepared using nanomaterials such as (boehmite, graphene, carbon nanotubes). In this research, two experiments are considered. The first experiment uses a solid target from a single crystal of diamond. The second experiment is conducted in the absence of a target. This means that ultrasound interacts with the surface of a tool for collecting the suspension at the initial time, and then with the processed suspension in the tank. Based on comparative experimental data, it has been shown that the ultra-jet processing method has several advantages.
Temperature state of the housing and shell for an inflatable aerodynamic decelerator
Authors: Abramova E.N.
Published: February 2021

Space debris is a growing concern that becomes more urgent with the increase in space exploration. This is the reason for equipping spacecraft with disposal systems. One of the methods for space debris removal is deorbiting a small spacecraft by using a decelerator. This paper presents issue analysis related to a selection of design and technology solutions and temperature analysis for inflatable aerodynamic decelerator of small spacecraft.
A method of sharing secrecy using star graphs
Authors: Prasad G , Anandan R , Uma Maheswari G
Published: February 2021

This article introduces a new technique of picture coding method for a secret text messages in the form of matrix using star related graphs by applying the subset of super mean labeling, sub super mean labeling is one of the important topics in graph theory. Let G be a (p, q) graph and α : V (G) → {1, 2, 3, · · ·, p+q} be an injection. For each edge l = uv, let

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Active Fraction as Anti-obesity by in Vitro toward Pancreatic Lipase Activity
Authors: Iswantini D , Hanif N , RizkiPranoto D , Trivadila
Published: February 2021

Fruit extract of asamgelugur (Garciniaatroviridis) can be used as an anti-obesity by in vitro against pancreatic lipase activity. The pancreatic lipase plays a role in degradation of lipids into fatty acids, as pancreatic lipase activity is hampered, the absorption of monoglycerides in the human body decreases. The purpose of the research was to identify and evaluate the Garciniaatroviridisfruit fraction as pancreatic lipase inhibitor. The extracted fruit with percolation method showed an inhibitory activity of 44.16% at 500 µg/mL. Xenical® as the positive control exhibited an inhibitory activity of 43.65% at 25 µg/mL. The best result from partitioning was using BuOH solvent with inhibitory activity of 56.42% at 100 µg/mL, whereas from Xenical® was 50.35% at 50 µg/mL. The best fraction from BuOH fractionation eluting with CH2Cl2:MeOH revealed an IC50 value of <10 µg/mL, or was better than Xenical®. Therefore, E fraction from BuOH solvent of garciniaatroviridisextract is potential as a pancreatic lipase inhibitor.
A study of substrate effect on dispersion characteristics of suspended microstrip line
Authors: Biswas K
Published: February 2021

In this paper suspended microstrip lines are studied for their dispersion characteristics using Galerkin Technique in Spectral Domain. Basis functions for the unknown strip current are chosen according to the geometry of the structure of the line. For theoretical analysis, Fourier transform of the basic functions from space domain to spectral domain are considered. The line is analyzed for dispersion characteristics in the X-band corresponding to different values of the thickness of the suspended dielectric substrate and also studied for the different values of the relative permittivity of the substrate.
Analysis of a long span cable-stayed suspension hybrid bridge considering variable intermediate side span supports
Authors: Savaliya G M , Desai A K
Published: February 2021

The bridges supported by high strength steel cables are the substitute to attain very lengthy bridge. Usually, cable supported bridge systems known as cable-stayed bridge and suspension bridge are used to achieve longer span bridge. In the cable-stayed bridge system better stiffness is achieved due to inclined stayed cables. In suspension bridge systems longer central span is achieved by provision of stiffened deck. The novelty in structural form, material technology and analysis methods offer further long span cable supported structural system. By combining the cable-stayed bridge and suspension bridge in a bridge, an innovative form of hybrid cable-stayed suspension bridge may offer enhanced behaviour. Mathematical model for innovative form of hybrid cable-stayed suspension bridge is addressed. The geometrical parameters play important role in structural behaviour of the cable-stayed suspension hybrid bridge. Nonlinear static analysis and modal analysis are carried out using SAP2000 software. The effects of intermediate side span support on the static and dynamic behaviour of cable-stayed suspension hybrid bridge are presented in the form of time period of bridge in lateral, longitudinal, vertical directions and pylon bending.
Utilization of waste glass powder as a cementitious material in concrete
Authors: Zanwar Anand B , Patil Yogesh D
Published: February 2021

Disposal of waste glass derived from bundling glass, beverage bottles, and so forth is one of the significant issues in the environment. This challenge keeps on expanding with increment the measure of waste glass and reduction the limit of landfill space. Hence, studies have been carried out to locate the handy approaches to reuse waste glass in building material, for example, cement, mortar, and concrete. In this study impact of waste glass powder (WGP) as cement substitution material on the green and mechanical properties of concrete were explored. The properties of concrete researched incorporate, Density, workability, strength activity index and compressive strength. Results from the investigation demonstrate that utilization of 20% WGP in concrete cube substitute to cement increase strength around to 12.5%. Additionally, usage of WGP up to 20% improves the properties of concrete. However, the workability of concrete reduced on the substitution of WGP increases because of the fine surface area of waste glass powder.
Development of seepage spring for rural water security
Authors: Ranjan Prem , Pandey Pankaj Kumar , Pandey Vanita , Lepcha Pema Tshering
Published: February 2021

Springs are the lifeline of the Himalayan region. Local Communities are fully depended on spring water for drinking and household use. At present climate change scenario, majority of springs are either dried or have become seasonal. Water demand is also increasing day by day in this region with an increasing population. To sustain in this changing scenario, communities are fulfilling their water needs by developing seepage spring using traditional knowledge. Seepage springs are normally not of sufficient volume of water to be flowing beyond their above-ground location due to very low permeability which may or may not have high porosity. The seepage discharge can be enhancing by increasing the seepage surface by excavating caves of suitable dimensions. Developed seepage spring discharge rate is less but an optimum designed harvesting spring water collection box will be providing the assured water supply to local communities. It may full fill the 30-40 villager’s daily requirement of water in the dry period (i.e., December to April). In the present paper, steps of spring development including the design of the spring box are described. The development cost of spring is cheap if locally available material is used and tapping the water for distribution is also cheap due to gravity flow water supply system. The developed spring provide assured supply of clean drinking water to residents, livestock and wildlife throughout the year. The development technique of spring can be valuable for survival purpose human and helps the local wildlife by adding another source to the region.
Feasibility studies on bio composites using PLA and Epoxy for structural applications.
Authors: Vijaya Kumar N , Banapurmath N R , Ganachari Sharanabasava V , Sajjan Ashok M , Patil Arun Y
Published: February 2021

Biopolymers are eco-friendly substitute materials to synthetic polymers due to their abundant resource, biodegradability, and ease of processing. In recent years biopolymer-based polymers attracted many researchers because of cost, lightweight, and recyclability. One of the most promising biopolymers used in many applications such as food, packaging, and medical and pharmaceutical industries is Polylactic Acid (PLA). Polymer scientists in the last decade widely investigated. Biopolymer is going to replace many synthetic materials. Desired properties of biopolymer can be obtained by blending with various additives. This research aims to reduce the dependence of synthetic polymer by reinforcing PLA in an Epoxy matrix. The Percentage of PLA is varied from 10 to 50% in a step of 10% using Solution Casting Technique. The mechanical, Functional (FTIR), thermal properties are investigated. The Epoxy and PLA composites with 20% PLA has shown improvement in Tensile strength compared to 10 and 30%.
Detection of Natural Calamities from Assamese Posts in Social Media
Authors: Kalita S , Deka R R , Bhuyan M P , Kashyap K , Sarma S K
Published: February 2021

Social media users and online news portals are rising exponentially in the Northeastern state of India, where every small instance of daily life are posted on social media platforms such as Facebook, Twitter by the users in their native language. Every social media user post about their daily experiences on such kind of social media platform which gives explicit information happening in a particular place. From those posts, extracting of information has been tried regarding natural calamities, a detection system which detects real world happening of natural calamities in a particular place. The objective of this paper is to detect such events from Assamese text posted on social media. Suppose an earthquake has happened, the online news portals, social media users started reporting about the happening in various platforms, just by observing the post an earthquake can be detected easily. A powerful statistical model Conditional Random Field (CRF) is used to detect those natural calamities as events from the posts which are being posted using the Assamese language. This model has the objective to capture the real-world happenings while a goal have been achieved by introducing an event extraction rule. The CRF model is trained with a large dataset NCED20 which is develop manually. The model is trained on a set of features and selecting those features is a significant step in the learning process. In this paper, an algorithm to capture events from the social media post has been proposed.
Prediction of degree student achievement analysis
Authors: Jaiswal K C , Pathak P D , Pawar V J , Kharat K D
Published: February 2021

Accurately estimating student upcoming achievement based on their going on educational records is critical for successfully bringing out needful pedagogical to guarantee student on time acceptable graduation. There has been ample of literature survey done on estimating in student achievement analysis, it has been faced certain problems while collecting the student data such as Student having low financial background selected course, Some courses give less detail which leads to formulating imprecise decisions and student upcoming scores should be included. In this proposed system, a machine learning function is build to estimate student achievement in graduation programs to eliminate above challenges. In this proposed system, for estimating student achievement a Logistic Regression and Extreme Gradient Boosting (XgBoost) algorithm are used. The data is collected from various junior college with computer science course as elective dataset of India to estimate student’s achievement for selecting a relevant course.
RETRACTED: Improving the performance of speech clustering methods using I-vectors
Authors: Suneetha Rani R , Prasad G LV , Prakash A , Ramesh A
Published: February 2021

Identification of speaker for the speech segment is a challenging task in speech clustering. Similar segments (i.e., those segments are spoken by the same speaker) are grouped into a cluster. Thus, segment labelling is very important in speaker detection. Existing systems use the Gaussian mixture model (GMM) for deriving the GMM mean supervector of speech segments in segment labelling process. i-vectors are tougher than GMM mean supervectors and i-vectors are between GMM mean supervectors high-dimensional space and low-dimensional manifolds. Existing GMM based speech clustering method is modified by i-vectors for achieving an effective speech clustering method. In order to show the feasibility of the proposed work, Experiments are performed on real time speech datasets.
Text document clustering using statistical integrated graph based sentence sensitivity ranking algorithm
Authors: Kannan G , Nagarajan R
Published: February 2021

The proposed methodology employs a novel statistical integrated graph-based sentence sensitivity ranking algorithm for text document clustering. Clustering of documents is a task of grouping a document automatically into a list of meaningful clusters; in order for the documents inside a group to share the same topic. In this paper, first, a novel integrated graph-based methodology using the sentence sensitivity ranking is proposed to extract keyphrases from the documents. In the standard statistical approach, keyphrases are extracted on the basis of the sentence sensitivity ranking; and in the graph-based method, the candidate keyphrases are automatically created as graphs by applying the sentence sensitivity ranking. With the aid of the top listed keyphrases, the documents clustering are carried out by implementing the proposed sentence sensitivity ranking algorithm. The simulation results reveal that the proposed graph-based text document clustering using statistical integrated graph-based sentence sensitivity ranking algorithm obtained the best results for clustering the text documents.
Emotion driven mood enhancing multimedia recommendation system using physiological signal
Authors: Sindhu N , Jerritta S , Anjali R
Published: February 2021

This paper exhibits a proposal for developing a multimedia recommendation system that is driven by the emotion of the user. The multimedia system is designed in such a way that the user will not have to manually browse for the audio/video to be played, it will be played automatically based on the emotion. The database comprises ECG signals collected from DECAF. Anger and sadness, emotions contributing to negative mood are considered. Discrete Wavelet Transform (DWT) was used for feature extraction and classification accuracy was determined using kNN, SVM. It was found that kNN classifies better than SVM. Realtime signals of one single healthy subject were collected based on a protocol built. Multimedia recommendation system operates automatically based on the classified emotion.
A proposed combined Cornell-Sokolow modeling approach to determine the left ventricular hypertrophy accurately based on multi-domain information processing
Authors: Mahin Muhtasheem Ajwad , Ahmad Mohiuddin
Published: February 2021

Left Ventricular Hypertrophy (LVH) is associated with cardiomyopathy and many other heart diseases. In this paper, the authors have proposed a combined Cornell-Sokolow (CCS) methodology to achieve significant improvement in detecting LVH by ECG/EKG with multi-domain analysis. Considering two famous voltage criteria simultaneously helps prevent the concealing of LVH in the patient’s data. The advancement of multi-domain analysis gives access to reach the algorithm from any common and cost-effective platform. This multi-domain analysis consists of both image and signal processing of the ECG data. In a MATLAB environment, these processes are quite accurate and optimized. With the help of the CCS model, the outcome of this research is satisfactory, both in terms of feature detection and LVH observation.
Design of a highly miniaturized novel electromagnetic bandgap (EBG) material for performance improvement in microwave components
Authors: Mohan C , Esther Florence S , Vimal Samsingh R , Ahmed Naveed
Published: February 2021

In this paper, a new uniplanar compact spiral-shaped asymmetric electromagnetic bandgap structure for a low-profile antenna is proposed. The proposed EBG design is constructed, with four spiral-shaped radiators are combined with centre element, which printed on an FR-4 dielectric material. The miniaturisation of the EBG unitcell has been achieved by increasing the electrical length of the radiating element. The overall dimensions of the proposed EBG structure is very low about only 0.03 λ0 × 0.03 λ0 (λ0 is the free space wavelength at the resonating frequency of 2.4 GHz). Miniaturization of the proposed EBG structure is 86 % obtained when compared to conventional EBG structure for 2.4 GHz. This spiral-shaped EBG design can adequately suppress surface wave and it exhibits effective band-stop response at resonant frequency 2.4 GHz. The proposed EBG structure also provides improved performance especially peak gain, when it is placed beneath the antenna. A significant improvement in peak gain up to 1.7 dB and 15 % bandwidth at resonant frequency 2.4 GHz has been achieved after integration with proposed EBG design.
Design of novel track vigilance system in railway sheds
Authors: Usha K , Bhuvaneshwari M
Published: February 2021

The work presented in this paper attempts to propose a vigilance system to alert the workers in the industrial areas especially in railway workshop shed and yards. Vigilance system in railway sheds offer an effective way to reduce the occurrence of railway accidents Normally, staffs in railway sheds are working round the clock duties and placement of the rakes are also done round the clock. They follow a traditional system such as issuing of memos and announcements which are not sufficient to alert the workers about the arrival of rakes. This leads to the death of valuable lives. The proposed system incorporates relay module, limit switch and transceiver to detect the arrival of train and warn the workers with the help of hooter. The efficacy of the proposed system is checked and found indispensable to alert the employees in railway sheds.
Comprehensive studies on polyvinyl alcohol (PVA) doped with MWCNTs and CNFs Nano composite membranes for fuel cells applications
Authors: Basavaraj Mallur , Gorabal S V , Banapurmath N R , Sajjan A M , Yaliwal V S , Kotresh M
Published: February 2021

This research work presents a comprehensive review and experimental studies on current trends in the development of proton exchange membrane (PEM) for fuel cell applications. The study focusses on fuel cells, types and their advantages when compared to convention energy conversion devices. Furthermore, research is essential for development of durable membrane resources/materials. Various aspects of PEM fuel cells have been reviewed to realize change in the membrane performance through characterization techniques adopted in this works. This study also focuses on gaps in already published literature which in turn limits our knowledge of characterization mechanism associated and the correlation existing between them. In addition, it needs to understand more appropriately to yield durable mechanisms. Further recent works on polymer electrolyte membrane fuel cells has been critically reviewed and in this direction two case studies have been presented as a part of experimental works carried out. Further Polymer based PEMs were developed using polyvinyl alcohol as a base matrix reinforced with different nano-particles viz., Multi walled carbon nanotubes (MWCNTs) and Carbon nano fibers (CNFs). The membranes were subjected to solubility and swelling tests and were characterized by using Fourier transform infrared (FTIR) spectroscopy, Thermo Gravimetric Analysis (TGA) for feasibility studies on their fuel cell applications.
An Innovative Way Of Implementing Efficient Mobile Charger Powered By Solar Energy
Authors: Sanitha Michail C
Published: February 2021

As non renewable energy sources are getting exhausted from earth, renewable energy sources need to be incorporated for daily needs. Mobile phones have become a vital part in life and its importance has increased so much that it needs to be kept charged. This paper proposes a system which is powered by solar energy to charge the mobile phones. The proposed system is designed to trap the solar energy and store it in a rechargeable battery. A mechanism to limit the over current flow in the circuit and to prevent the draining of battery and low voltage operation is incorporated in the system. Many low-voltage devices including mobile phones can be charged using this system and the charge in the battery is displayed with the help of LCD and a micro-controller
Net Zero Energy Apartment
Authors: Sangamesh  , Faraz Mohammed , Gagan  , Mallinath  , Aqib Mohhamed , Patil Nayana
Published: February 2021

In India, construction is the second largest industry next to agriculture, with respect to its contribution to the economy of our country. Construction sector consumes a lot of energy throughout the life cycle of the buildings and contributes immensely to the emission of greenhouse gases like carbon dioxide. Considerable amount of water is being consumed during the construction activities. It is found that In-dia’s water table is decreasing, Hence, there is a need to bring down en-ergy consumption and conservation and harvesting of water by implementing green and zero energy concepts. Net zero energy building is defined as a building with zero dependence on external source of energy. The main aim of this study is “Planning, analyzing and designing a 5 floor apartment building by implementing zero energy concepts and techniques”. Planning has been carried out by taking into account, the orientation aspects. Planning and plotting of the structure has been car-ried out using AutoCAD. Further analysis is done in STAAD Pro V8i and Cype taking the design loads for both zero energy and conventional building. Energy saving components such as rainwater harvesting system, solar panels, biogas plant, and wind energy and sewage treat-ment plant have been implemented as per standards. The dependence on external energy source is reduced by making use of the alternative energy sources such as solar PV panels, biogas and wind turbine there by making it economical environmental friendly. Estimation of the materials based on the drawings and specifications is carried out. Lastly, a comparative study of conventional versus zero energy building is done by performing cost benefit analysis of solar panel system.By using rainwater harvesting system the water bills reduced by 27% annually and by installing a solar panel with a capacity of 233 Kw/h led to the energy savings by 20 % annually. Also from the cost estima-tion, the payback period for green building was approximately 2.9 years for solar power.
Laser surface hardening of SS316L
Authors: Dongre Ganesh , Rajurkar Avadhoot , Gondil Ramesh , Jaju Nandan
Published: February 2021

Laser surface hardening is one of the effective method to enhance the mechanical properties of localised surface area of engineering parts made of different types of steels and other metals like titanium etc. Laser surface hardening has many advantages over conventional hardening process like, self-quenching, very fast, control over energy input and localised hardening etc. This work presents the effect of different laser parameters on the micro hardness of SS316L after laser hardening. The experimental work was carried out using 30W Diode-pumped nanosecond (ns) pulsed laser. Design of Experiments One Variable at a Time (OVAT) approach was used for experimentation. Laser power, laser scanning speed, frequency and number of passes were the process parameters used for the experiments. Effects of these parameters over the micro hardness of the surface are described. Along with this, discussion of features of microstructures using optical microscope are done. It has been found that, there is around 25% increase in hardness after laser hardening. Hardened depth up to 400 microns was obtained.
Modelling of leakages in rotary twin-screw compressor
Authors: Patel H H , Lakhera V J
Published: February 2021

The adiabatic and volumetric efficiencies are key performance parameters of any positive displacement machines including twin screw compressors. These efficiencies are affected by clearances and leakages in these machines. The leakage happen because of clearance gap and pressure difference between two pressurized chambers the compression module. In this work, findings from all the numerical and mathematical models are presented for different leakages in the twin-screw compressor. Authors proposed an iterative method to estimate the leakages by taking in account the geometry of the clearance, friction and local resistances. An experimental set up to collaborate the leakage model is presented, which can be used for further investigation of these leakages.