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Room-Temperature Gas Sensors Under photoactivation:From Metal Oxides to 2D Materials

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Nano-Micro Letters 2020年第11期12卷 292-328页

作者： Rahul Kumar Xianghong Liu Jun Zhang mahesh Kumar Department of Electrical Engineering Indian Institute of Technology JodhpurJodhpur 342037India College of physics Center for Marine Observation and CommunicationsQingdao UniversityQingdao 266071People’s Republic of China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071People’s Republic of China

Room-temperature gas sensors have aroused great attention in current gas sensor technology because of deemed demand of cheap,low power consumption and portable sensors for rapidly growing Internet of things *** an important approach,light illumination has been exploited for room-temperature operation with improving gas sensor's attributes including sensitivity,speed and *** review provides an overview of the utilization of photoactivated nanomaterials in gas sensing ***,recent advances in gas sensing of some exciting different nanostructures and hybrids of metal oxide semiconductors under light illumination are ***,excellent gas sensing performance of emerging two-dimensional materialsbased sensors under light illumination is discussed in details with proposed gas sensing *** impressive features from the interaction of photons with sensing materials are elucidated in the context of modulating sensing ***,the review concludes with key and constructive insights into current and future perspectives in the light-activated nanomaterials for optoelectronic gas sensor applications.

关键词： Gas sensor Room temperature photoactivation Metal oxide 2D materials

Laboratory investigation of compaction characteristics of fresh and degraded municipal solid waste

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Waste Disposal and Sustainable Energy 2020年第4期2卷 305-312页

作者： mahesh Endait Swati patil Department of Civil Engineering School of Engineering and TechnologySandip UniversityNashikIndia

com-pacted MSW increases the placement efficiency and thus reduces the space requirement for *** composition of MSW,degradation,and compactive efforts are the key factors that control the compaction characteristics of *** paper presents the laboratory investigation of compaction characteristics of fresh and aged MSW at a wide range of compactive *** MSW(S_(1)),Windrows sample(S_(2))of an age of 2 months,5-year-old MSW(S_(3)),10-year-old MSW(S_(4)),and 15-year-old MSW(S_(5))were collected from the working phase of the solid waste management site,Vilholi Nasik,(MH)*** was carried in 1000 mL capacity mold under four different energy levels,i.e.,552(E_(1)),1125(E_(2)),2682(E_(3)),and 5364(E4)kJ/m^(3).The results showed that the maximum dry density(γ_(dmax))was observed less in the S_(1)sample at the standard compactive *** the age of the sample increase from fresh to 5 years,γ_(dmax)was more with lesser optimum moisture content(w_(opt))because of the completion of the biodegradation *** further change in compaction characteristics was observed once the biodegradation process was *** study shows that the particle size of MSW gets reduced as the age of the sample *** reduces the particle size of MSW is one of the contributing factors to increasingγ_(dmax).When compactive energy is changed from E_(1)to E4 theγ_(dmax)increased and w_(opt)decreased for all the samples.A normalized w_(opt)and compaction energy correlation is proposed in this *** correlation can get compaction characteristics of fresh and aged MSW at any compactive effort.

关键词： Compaction Municipal solid waste Degradation Compaction efforts

paired Measurements of Foraminiferal δ~ （18） O and Mg/Ca Ratios of Indian Monsoons Reconstructed from Holocene to Last Glacial Record

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Acta Geologica Sinica(English Edition) 2011年第4期85卷 950-956页

作者： Badanal mahesh Virupaxa BANAKAR George BURR National Institute of Oceanography(CSIR) Dona PaulaGoa 403 004India National Science Foundation-Arizona Accelerator Mass Spectrometer Facility 1118 East 4th StreetTucsonAZ85721-0081USA

The effect of seasonally reversing monsoons in the northern Indian Ocean is to impart significant changes in surface salinity（SS）.Here,we report SS changes during the last 32 kyr in the Lakshadweep Sea（southeastern Arabian Sea）estimated from paired measurements of δ18O and sea surface temperature（SST）using Globigerinoides sacculifer,an upper mixed layer dwelling *** heaviest δ***（-0.07±0.08‰）is recorded between 23 and 15 ka,which could be defined as the last glacial maximum（LGM）.The δ*** between the LGM and Holocene is 2.07‰.The SST shows an overall warming of 2℃from the LGM to Holocene（28℃to 30℃）. However,coldest SSTs are observed prior to LGM,i.e.,～27 *** SS was higher（～38 psu） throughout most of the recorded last glacial period（32.5-15 ka）.This high salinity together with generally lower SSTs suggests a period of sustained weaker summer or stronger winter *** deglacial warming is associated with rapid reorganization of monsoons and is reflected in decreased salinity to a modern level of～36.5 psu,within a period of～5 *** indicates intensification of summer monsoons during cold to warm climate transition.

关键词： paleoclimate oxygen isotopes Mg/Ca thermometry monsoon variability Arabian Sea

Modeling oblique load carrying capacity of batter pile groups using neural network,random forest regression and M5 model tree

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Frontiers of Structural and Civil Engineering 2019年第3期13卷 674-685页

作者： Tanvi SINGH mahesh pAL V.K.ARORA Department of Civil Engineering National Institute of TechnologyKurukshetraHaryana 136119India

M5 model tree,random forest regression(RF)and neural network(NN)based modelling approaches were used to predict oblique load carrying capacity of batter pile groups using 247 laboratory experiments with smooth and rough pile *** length(L),angle of oblique load(a),sand density(ρ),number of batter piles(B),and number of vertical piles(V)as input and oblique load(Q)as output was *** suggest improved performance by RF regression for both pile groups.M5 model tree provides simple linear relation which can be used for the prediction of oblique load for field data *** developed using RF regression approach with smooth pile group data was found to be in good agreement for rough piles *** based approach was found performing equally well with both smooth and rough *** analysis using all three modelling approaches suggest angle of oblique load(a)and number of batter pile(B)affect the oblique load capacity for both smooth and rough pile groups.

关键词： batter piles oblique load test neural network M5 model tree random forest regression ANOVA

Multi Object Tracking Using Gradient-Based Learning Model in Video-Surveillance

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China Communications 2021年第10期18卷 169-180页

作者： D.Mohanapriya Dr.K.mahesh Department of Computer Applications Alagappa UniversityKaraikudiTamil Nadu 630003India

On accomplishing an efficacious object tracking,the activity of an object concerned becomes notified in a forthright *** accurate form of object tracking task necessitates a robust object tracking procedures irrespective of hardware *** approaches inferred a vast computational complexity to track an object with high accuracy in a stipulated amount of processing *** the other hand,the tracking gets affected owing to the existence of varied quality diminishing factors such as occlusion,illumination changes,shadows etc.,In order to rectify all these inadequacies in tracking an object,a novel background normalization procedure articulated on the basis of a textural pattern is proposed in this *** preprocessing an acquired image,employment of an Environmental Succession prediction algorithm for discriminating disparate background environment by background clustering approach have been ***,abstract textural characterizations through utilization of a probability based Gradient pattern(pGp)approach for recognizing the similarity between patterns obtained so *** between standardized frame obtained in prior and those processed patterns detects the motion exposed by an object and the object concerned gets identified within a ***,the system is resistant towards illumination *** illumination variation was interpreted in object tracking residing within a dynamic *** approach certainly outperforms other object tracking methodologies like Group Target Tracking(GTT),Vi pER-GT,grabcut,snakes in terms of accuracy and average *** pGp-based pattern texture analysis is compared with Gamifying Video Object(GVO)approach and hence,it evidently outperforms in terms of precision,recall and F1 measure.

关键词： binary labeling computer vision gradient pattern laplacian operator object Tracking

Efficient blue perovskite LEDs from quantum confined structures

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Science China Chemistry 2020年第1期63卷 3-4页

作者： mahesh K.Gangishetty Daniel N.Congreve Rowland Institute Harvard University

Lead halide perovskites have been leading the optoelectronic field for the last several years,with exceptional progress in photovoltaics and rapid improvement in light emitting diodes(LEDs).LEDs are limited by outcoupling and waveguiding to approximately 20%external quantum efficiency(EQE),and infrared and green perovskite LEDs have already reached this threshold[1-3].For most applications,however,blue light is also required,and blue perovskite LEDs have been left behind,with a maximum EQE of 5.7%at 480 nm[4],and〜2%at wavelengths less than 470 nm[5].These lower efficiencies are due to both challenges inherent in blue(i.e.,wide band gap)materials as well as stability and defect problems specific to blue perovskites.

关键词： optoelectronic quantum perovskite

A comprehensive review of greenhouse shapes and its applications

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Frontiers in Energy 2019年第3期13卷 427-438页

作者： Ravinder Kumar SAHDEV mahesh KUMAR Ashwani Kumar DHINGRA Mechanical Engineering University Institute of Engineering & TechnologyMaharshi Dayanand UniversityRohtakHaryana 124001India Mechanical Engineering Guru Jambheshwar University of Sciences and TechnologyHisarHaryana 125001India

Greenhouse technology is a practical option for the production and drying of agricultural products in controlled environment. For the successful design of a greenhouse, the selection of a suitable shape and orientation is of great importance. Of various shapes of greenhouses, the even-span roof and the Quonset shape greenhouses are the most commonly used for crop cultivation and drying. The orientation of greenhouses is kept east-west for maximum utilization of solar radiations. Hybrid and modified greenhouse dryers have been proposed for drying of products. The agricultural products dried in greenhouses are found to be better in quality as compared to open sun drying because they are protected from dust, rain, insects, birds and animals. Moreover, various greenhouses shapes along with their applications have been reviewed.

关键词： greenhouse shapes drying solar energy agriculture products orientation

All-perovskite tandems go bifacial

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Light(Science & Applications) 2023年第1期12卷 10-11页

作者： Suhas mahesh Bin Chen Edward H.Sargent The Edward S.Rogers Department of Electrical and Computer Engineering University of TorontoTorontoON M5S 3G4Canada Department of Chemistry Northwestern UniversityEvanstonIL 60208USA Department of Electrical and Computer Engineering Northwestern UniversityEvanstonIL 60208USA

All-perovskite tandem cells are attractive candidates for next-generation photovoltaic technology as they hold the potential to combine high-efficiency with low weight and reduced energy-payback ***,researchers show that such tandem cells can be engineering to be bifacial,allowing them to utilize stray light reflected off the surrounding environment,resulting in a 17%boost in the power output.

关键词： utilize attractive perovskite

Effect of diurnal changes on dichotic listening in younger adults with normal hearing

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Journal of Otology 2022年第4期17卷 191-196页

作者： praveen prakash K.p.Vismaya Dhruvan S.mahesh prashanth prabhu Department of Audiology All India Institute of Speech and HearingManasagangothriMysuru570006India

Background:Diurnal changes can be defined as the time of the day over an individual's performance level for different activities that involve physical and mental ***:The current study aimed to evaluate the effect of diurnal changes in scores obtained for the Dichotic Consonant-Vowel paradigm by young adults with normal hearing ***:Based on the‘Morningness-Eveningness questionnaire’given by Horne&Ostberg,the subjects were divided into moderately-morning,intermediate and moderately-evening *** Dichotic Consonant-Vowel tests were performed during morning and evening,and the right ear,left ear and double correct scores were compared between morning and evening for each ***:There was significant diurnal changes noted for moderately morning and evening categories,where morning-type individuals performed better during morning and evening-type individuals performed better during the *** scores of intermediate individuals remained unchanged between morning and evening test ***:Diurnal change is a phenomenon associated with an individual's biological clock ***,attention and inhibitory controls aid them in carrying out tasks that require sufficient physical and mental *** current study suggests that clinicians and researchers consider diurnal changes as an extraneous variable that could affect the reliability of the Dichotic Consonant-Vowel test results.

关键词： Diurnal changes Circadian rhythms Dichotic-CV Binaural auditory processing Dichotic listening