bluuebunny/crossref_metadata_2025_split huggingface dataset:
The application of deep-penetrating filling technology in the special high water-containing period of blocks
Authors: Lunjian Duan 
Published: May 2021

Abstract
After the oil field enters the ultra-high water-containing period, the residual oil distribution is scattered, the excavation is difficult, the fine geology describes the large area application of the three-dimensional earthquake, the understanding of the underground situation is becoming more and more clear, the explanation of the oil layer is more and more fine, the redistribution of the fault is more clear, so that the excavation of the residual oil is more targeted. In the stage of the special high water-containing period, due to the restriction of the fault to the conventional measures, the residual oil can not dig, and the conventional measures can not dig the water after the effective control measures, and the deep-penetrating filling technology is used to fill the oil wells, which solves the problem of the residual oil excavation difficulties in the fault area, and achieves better development results. This paper expounds the working principle, process and effect of deep penetration filling technology and the effect obtained after the application of block, and puts forward a new management idea for oil and water well measures.
Analysis on the Causes of Coal Mine Accidents and Research on Prevention Countermeasures
Authors: Wu Weizheng 
Published: May 2021

Abstract
In order to explore coal mine accident prevention and control countermeasures, the coal mines in Jiangxi Province were taken as representatives to analyze the causes of coal mine accidents in Jiangxi Province from 2000 to 2013 and put forward targeted prevention and control countermeasures. It is of great significance to the prevention and control of similar coal mine accidents.
Effect of Ni/Co vermiculite as catalysts for Catalytic pyrolysis of plastic wastes
Authors: Wang Yiqian , Sun Zhipeng 
Published: May 2021

Abstract
In this study, the modified vermiculite adjusted with Ni and Co for pyrolysis of plastic is characterized by X-ray diffraction (XRD) and Brunauer Emmett Teller (BET). These results indicate that the ratio of Ni and Co can affect the surface area and pore diameter of catalyst. In addition, the results of GC show that Ni and Co not only have a good selectivity of C3, the main gaseous hydrocarbons of pyrolysis products, but also play an important role in dealing with low quality of oil products of plastic pyrolysis by controlling the concentration of metal oxide particles in the vermiculite layer. The adjustment of the molar ratio of Co and Ni can optimize the hydrogenation/dehydrogenation of metal active sites. It means that the greatly catalytic activity of supported Ni and Co catalysts is caused by moderate total acidity, relatively high surface area, and uniformly dispersed oxide particles on vermiculite support. Therefore, it suggests that adopting the clay catalyst is an efficient and environmentally friendly way to produce valuable products in pyrolysis of plastic waste.
Mercury speciation transformation in sewage of the sewage treatment process
Authors: Li Yunpeng , Wang Yan , Liu Ruhai , Shao Long , Liu Xiaoyu , Han Kun 
Published: May 2021

Abstract
In order to reveal the occurrence characteristics and speciation transformation of mercury in the sewage treatment plant, the sewage of each process unit in Mai dao sewage treatment plant was taken as the research object, the total mercury (THg), particulate mercury (PHg) and dissolved mercury (DHg) in the samples was determined for 7 consecutive days. The results showed that the THg in influent water was 474.6±148.4ng/L, and had a large daily variance, and that in effluent was 27.8±8.2 ng/L. THg in wastewater was closely related to the degree of organic pollution. PHg accounted for a larger proportion in raw sewage (PHg/THg was 73.5%), and the proportion of DHg increased after treatment. The total removal efficiency of THg was 94.1%, and PHg contributed a lot. The removal of mercury mainly occurred in the secondary biological treatment process.
Characterization of AMCs Produced by Stir Casting Technique
Authors: Saleem M , Kumar raj Nishant , kumar Yogesh , Kumar Pranav 
Published: May 2021

Abstract
Stir casting is the simplest and cheapest method to manufacture composite materials. The objective of the research work is to produce Aluminum Matrix Composites with LM5 as matrix material and Fly Ash as reinforcement material at 0, 5, 10 % by weight, using stir casting technique and to study the mechanical properties such as tensile test, impact test, hardness test. The wettability between all these materials is assured by stir casting process. The microstructure of the composite show that the reinforcement material is homogeneously distributed in the matrix materials. Tensile Strength decreases with increase in weight percentage of Fly Ash. The weight percentage of Fly Ash has no effect on the impact strength of the composite. The hardness increases with the increase in weight percentage of fly ash and hence the fly ash can be used for increasing the wear resistance of the composites, where hardness plays a major role in industries which can turn industrial waste into industrial wealth.
Fmea Analysis on Offshore Wind Turbines Using Fuzzy Multimooramethod
Authors: Kotkunde Nitin , Chauhan Mayank , Chetti Karthick 
Published: May 2021

Abstract
Failure mode effective analysis (FMEA) is a quality instrument that is being used to recognize potential failure modes and its related consequences on different complex sub-structures in a system. The tool is effectively used for continuous improvement of efficiency, reliability, and quality. However, the traditional FMEA methods using risk priority number (RPN) values have been criticized for having many immanent limitations, affecting its effectiveness in real-world applications. Many risk priority models are emerging in the field of safety and reliability engineering. Among these models, Multi-criteria decision making (MCDM) methods are amongst the most widespread approaches employed to rank failure modes. The main aim of the present work is to implement FMEA analysis using fuzzy MULTIMOORA method. The proposed model has the competence of representing the imprecise knowledge and uncertainties of FMEA team members. FMEA analysis has been performed on offshore wind turbines consisting of four sub-assemblies for nine potential failure modes. The failure modes and its risk factors have been well-defined and appropriate linguistic variables are assigned to the failure modes according to the knowledge of team members. The responses of the team members have been aggregated and operated by the fuzzy model which prioritizes failure modes. The comparison of traditional FMEA rankings with the proposed model displays that a more precise and rational ranking can be attained by the incorporation of MULTIMOORA method using fuzzy set theory to FMEA.
Life Cycle Assessment of Nickel Cadmium Battery
Authors: Nitin Kotkunde K V , Ashwin Amrith , Gosavi Abhishek , Gaur Mayank 
Published: May 2021

Abstract
The life cycle assessment of the battery will help one to identify the energy and cost associated with the product from the cradle to gate processes. The ecological footprint of a company can reduce the power of a brand when consumers avoid unsustainable practices. The performance of the product can be compared with its competitors. The potential areas of improvement can be identified, which in turn helps to improve the performance of the product. The energy associated with the product during processing, manufacturing, usage and transportation stages has been identified in this paper. The energy pay back for the battery has been calculated, which can be used to compare batteries among each other. On finding the energy payback of the battery, a framework has been developed which can be used in future to compare different batteries. And the impact assessment helped to interpret the important areas of improvement and the sector producing maximum impact. And some methods which can be implemented to decrease the impact and burdens produced during the product development stages are discussed.
IMPROVED SENTIMENT ANALYSIS FOR DRAVIDIAN LANGUAGE-KANNADA USING DICISION TREE ALGORITHM WITH EFFICIENT DATA DICTIONARY
Authors: Ranjitha P , Bhanu K N 
Published: May 2021

Abstract
The trend of exploring the micro blogging services is being hit door to door. The creation and sharing of short text messages is at its top gear. Reviews, being one of the fastest growing online networking services, which receives around millions of reviews per day, has emerged as an invaluable source of the sentiment analysis. Sentiment analysis refers to recognize the sentiment, polarity, opinion or emotion of a text. Websites like news Kannada, prajavani, http://wedunia.com, and oneindianews have reviews written in Kannada which has a higher preference than the common languages. In the current system, research are carried in sentiment analysis for regional language such as Hindi, Bengali, Kannada etc., are very few compared to English language. Here we propose a system which is computationally identifying and categorizing opinions expressed in a piece of text written in Kannada language, especially in order to determine whether the writer’s attitude towards a particular topic, product, etc. is positive, negative, or neutral.
Design And Analysis Of Modified Four Stroke Four Revolution Engine
Authors: Jadhav Prashant S. , Mohanty Chinmaya P. 
Published: May 2021

Abstract
In today’s world, one of the important tasks is to handle the energy available and to minimize the heat losses. In automotive sector, engine is the primary energy source and there are many losses associated with an engine out of which engine cooling and exhaust losses takes major share. In four-stroke SI/CI engines, four strokes of reciprocating cylinder involve two rotations of the crankshaft. These strokes are suction, compression, power and exhaust respectively. A large amount of fuel energy is wasted when fuel is not compressed completely and also at the exhaust of internal combustion engines. This paper focusses on minimizing losses of internal combustion engine by secondary expansion of exhaust gases through 180 ° of crank revolution. For this purpose, four stroke four revolution mechanism is proposed and this is achieved by modifying current slider crank mechanism with double connecting rod arrangement. This modified engine shows an increase in the air standard cycle efficiency by 4.10% where as fuel air cycle efficiency rise is observed to be 5.25%. There is also significant rise observed in the modified engine over conventional engine in terms of gross indicated thermal efficiency and brake thermal efficiency as well.
Front, rear and side impact analysis of backbone chassis of a compact sports car
Authors: Ramaiya Umang Bharatkumar , Vemuluri Ramesh Babu , Darla Siva Prasad , Edwin Sudhagar P , Ashok B 
Published: May 2021

Abstract
The automotive chassis is the main load carrier and energy absorbing component in all crash events namely, frontal impacts, rear impacts, side impacts and roll over. It is important to have a strong and light weight material for the chassis. The purpose of this paper is to observe how a backbone chassis behaves during collision. This work involves static, dynamic and modal analysis of a backbone chassis of Lotus Europa, a compact sports car. Deformation, stress and strain distribution are evaluated and factor of safety is calculated using static structural analysis. In modal analysis mode shapes for different natural frequencies of the system are presented. Further, impact analysis performed using explicit dynamic analysis compares the deformation and stress distribution for front, rear and side impact for different impact velocities. Two materials namely mild steel and aluminium are compared for impact analysis.
Influence of CNTs grading and reinforcement on dynamic characteristics of composite Plates in thermal environment
Authors: Garg Vasuraj , Saxena Sanidhya , Goyal Gaurav , Soni Sourabh Kumar , Thomas Benedict 
Published: May 2021

Abstract
This analytical work deals with the dynamic analysis of the functionally graded composite plate reinforced with single walled carbon nanotubes is discussed in this article. By using the extended rule of mixtures, the material properties were computed. The dimensionless frequency parameter was discovered by generating ABAQUS-solved eigenvalues and eigenvectors. The subspace process was used to produce buckling Eigenvalues for the plate. The purpose of the current research work was to analyse the influence of varying temperatures, CNTs and CNTs grading volume fractions on dimensionless frequencies and buckling factors or parameters. From the findings available in the literature, the results of this analysis have been established. CNTs volume percentage and its distribution were found to have a substantial impact on the dimensionless fundamental frequencies. Moreover, similar effect of these parameters on plate buckling were also been observed. Results reveal that the addition of CNT enhances the stiffness of the plate.
Integration of Virtual Reality and Digital Human Model Simulations for Ergonomic Analysis of CAD Models
Authors: Kumar S Senthil , Ashok Denis S 
Published: May 2021

Abstract
The paper deals the exercising Virtual Reality (VR) validation for ergonomic study of Computer Aided Design (CAD) virtual environment models, for the safe and comfortable operations for human. The CAD based virtual environments will subject to ergonomic analysis could reduce the costs of testing and errors in integration of sub systems compared to real-time trials. In this venture, a Digital Human Model Simulation (DHMS) was analysed in a workspace by incorporating VR simulation softwares. A transport and freight of military personnel and equipment in Armoured Personnel Carrier Vehicles (APVCs) model was employed as environment for ergonomic assessment. VR device with head-mounted display was used to perform the ergonomics analysis in virtual environment. The ergonomics study and the experience lead to changes in design features. This application could benefit in the defence, aerospace and naval sector, where ergonomically viable compact spaces for human inhabit of key importance.
Photophysical and morphological properties of spin-coated and self-assembled carbazole derivative thin films
Authors: Sousa Cordeiro Diéricon , de Souza Geovany Albino , Martins Tatiana Duque 
Published: May 2021

Abstract
In this work, single-layered, bi-layered and tri-layered poly(vinyl-carbazole) (PVK) thin films were produced by spin-coating and self-assembling techniques and their morphological and photophysical properties were determined by time-resolved fluorescence spectroscopy, atomic force microscopy (AFM) and fluorescence microscopy. The effect of distinct aggregates formed in thin films on their photophysical and morphological properties was determined, evidencing that procedure control is essential to determine PVK thin film application. It was found that sandwich excimers are dominant in self-assembled films, evidenced by longer fluorescence lifetimes and red-shifted emissions, while in spin-coated films, shorter fluorescence lifetimes evidenced more efficient non-radiative energy transfer. AFM showed that consecutive deposited layers result in more uniform, thinner films when produced by spin-coating, but showing aggregation heterogeneity as evidenced by fluorescence spectroscopy. Yet, self-assembled films are rough, heterogeneous and thicker, showing prevalence of less variety of aggregates. These are crucial findings to address PVK application.
Silver nanoparticles biosynthesised by using Bacillus megaterium IBBPo17
Authors: Stancu Mihaela Marilena 
Published: May 2021

Abstract
The present study aimed to investigate the capability of a solvent-tolerant bacterium, Bacillus megaterium IBBPo17, to synthesise silver nanoparticles (AgNPs) through either intracellular or extracellular activities, and to establish if their production was affected when the cells were grown in the presence of organic solvents. The intracellular and extracellular biosynthesis of AgNPs by B. megaterium IBBPo17 was first confirmed by visual observation and UV–vis spectroscopy and further analysed by high-performance thin-layer chromatography (HPTLC) and transmission electron microscopy (TEM). The antibacterial activity of the synthesised AgNPs was investigated by the agar diffusion method. The intracellular and extracellular biosynthesis of AgNPs by B. megaterium IBBPo17 when the cells were grown or not in the presence of organic solvents (i.e., n-decane, n-hexadecane, n-hexane, cyclohexane) was confirmed visually by the appearance of a yellowish-brown colour in the reaction mixture or a dark precipitate, as well as by using UV–vis spectroscopy (surface plasmon resonance peaks at 425–455 nm) and TEM analyses (particle with spherical shape, size ranging from 1–85 nm). The biosynthesised AgNPs showed excellent antibacterial activity against several Gram-positive and Gram-negative bacteria. Due to their characteristics, the biosynthesised AgNPs could be used as antibacterial agents, but they could have many other applications.
Molecular simulation of the morphology and viscosity of aqueous micellar solutions of sodium lauryl ether sulfate (SLEnS)
Authors: Peroukidis Stavros D , Mintis Dimitris G , Stott Ian , Mavrantzas Vlasis G 
Published: May 2021

Abstract
In a recent contribution, we introduced a new approach for the quantitative prediction of the micellar morphology of aqueous solutions of ionic surfactants based on coarse-grained MARTINI-type simulations followed by reverse-mapped all-atom (AA) molecular dynamics (MD) ones, using as a model system sodium dodecyl sulfate. We make use of the same approach in the present work to study the micellar structure of aqueous solutions of sodium lauryl ether sulfate (SLEnS) with the chemical structure CH3(CH2)11(OCH2CH2)
n
OSO3Na with a fixed number n of ethoxyl (EO) groups per surfactant molecule (n = 1, 2, 3). These surfactants are used in a wide range of industrial applications, particularly in personal and home care products, but a quick literature survey proves that a systematic study of their microstructure, micellar morphology, and equilibrium transport properties is missing. Our simulations provide predictions for the mean aggregation number of such monodisperse SLEnS solutions which are found to be in very good agreement with experimental data already reported in the literature. They also show that for a given total surfactant concentration, SLEnS molecules with a smaller number n of EO groups form, on average, larger micelles. From the reverse-mapped AA MD simulations we also compute the zero shear rate viscosity of the solution whose value is found to increase as its total concentration in SLEnS molecules increases (for a given n) or as the number n of EO groups in the surfactant increases (for a given concentration).
Endometrial Cancer Characteristics and Risk of Recurrence
Authors: Borden Lindsay E , Locklear Tonja M , Grider Douglas J , Osborne Janet L , Saks Erin J , Valea Fidel A , Iglesias David A 
Published: May 2021

Abstract

Objectives
To describe clinicopathologic characteristics and survival outcomes of endometrial adenocarcinomas stratified by mismatch repair (MMR) status.

Methods
Single-institution, retrospective study of all women with endometrioid adenocarcinomas treated from January 2012 through December 2017. Patients were categorized into one of three groups based on MMR testing: intact MMR expression (MMR+), probable MMR mutation (MMR–), or MLH1 hypermethylation (hMLH1+). Demographics, pathologic characteristics, recurrence rates, and survival differences were analyzed.

Results
In total, 316 women were included in the analysis: 235 (74.4%) patients in the MMR+ group, 10 (3.1%) in the MMR– group, and 71 (22.5%) in the hMLH1+ group. Patients with hMLH1+ were significantly older, exhibited higher-grade histology and presence of lymphovascular space invasion, and were more likely to have received adjuvant treatment. The early stage hMLH1+ patients were more likely to recur (15.3% hMLH1+ vs 2.3% MMR+ vs 12.5% MMR–, P &lt; .001). Hypermethylation remained a significant predictor of recurrence in multivariable analysis (odds ratio, 5.09; 95% confidence interval [CI], 1.54-16.86; P = .008). Recurrence-free survival was significantly reduced in early stage hMLH1+ (hazard ratio, 7.40; 95% CI, 2.80-21.62; P &lt; .001).

Conclusions
Women with hMLH1+ endometrial cancer have worse prognostic features and recur more frequently, even in patients traditionally considered low risk for recurrence.
A Scoping Review of Technologies and Their Applicability for Exposome-Based Risk Assessment in the Oil and Gas Industry
Authors: Kuijpers Eelco , van Wel Luuk , Loh Miranda , Galea Karen S , Makris Konstantinos C , Stierum Rob , Fransman Wouter , Pronk Anjoeka 
Published: May 2021

AbstractIntroductionOil and gas workers have been shown to be at increased risk of chronic diseases including cancer, asthma, chronic obstructive pulmonary disease, and hearing loss, among others. Technological advances may be used to assess the external (e.g. personal sensors, smartphone apps and online platforms, exposure models) and internal exposome (e.g. physiologically based kinetic modeling (PBK), biomonitoring, omics), offering numerous possibilities for chronic disease prevention strategies and risk management measures. The objective of this study was to review the literature on these technologies, by focusing on: (i) evaluating their applicability for exposome research in the oil and gas industry, and (ii) identifying key challenges that may hamper the successful application of such technologies in the oil and gas industry.MethodA scoping review was conducted by identifying peer-reviewed literature with searches in MEDLINE/PubMed and SciVerse Scopus. Two assessors trained on the search strategy screened retrieved articles on title and abstract. The inclusion criteria used for this review were: application of the aforementioned technologies at a workplace in the oil and gas industry or, application of these technologies for an exposure relevant to the oil and gas industry but in another occupational sector, English language and publication period 2005—end of 2019.ResultsIn total, 72 articles were included in this scoping review with most articles focused on omics and bioinformatics (N = 22), followed by biomonitoring and biomarkers (N = 20), external exposure modeling (N = 11), PBK modeling (N = 10), and personal sensors (N = 9). Several studies were identified in the oil and gas industry on the application of PBK models and biomarkers, mainly focusing on workers exposed to benzene. The application of personal sensors, new types of exposure models, and omics technology are still in their infancy with respect to the oil and gas industry. Nevertheless, applications of these technologies in other occupational sectors showed the potential for application in this sector.Discussion and conclusionNew exposome technologies offer great promise for personal monitoring of workers in the oil and gas industry, but more applied research is needed in collaboration with the industry. Current challenges hindering a successful application of such technologies include (i) the technological readiness of sensors, (ii) the availability of data, (iii) the absence of standardized and validated methods, and (iv) the need for new study designs to study the development of disease during working life.