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Geochemical Modelling of Fluoride Concentration in Hard Rock Terrain of Madhya Pradesh, India

Acta Geologica Sinica(English Edition) 2013年第5期87卷 1421-1433页

作者： Jay Krishna THAKUR Prafull singh sudhir kumar singh Bijendra BHAGHEL Thakur International & Investment (P) Ltd. Amity Institute of Geo-Informatics and Remote Sensing (AIGIRS) Amity University K.Banerjee Centre of Atmospheric and Ocean Studies IIDS University of Allahabad Department of Earth Sciences Barkatullah University

The aim of the present study is to locate and decipher the groundwater quality, types, and hydrogeochemicai reactions, which are responsible for elevated concentration of fluoride in the Chhindwara district in Madhya Pradesh, India. Groundwater samples, quality data and other ancillary information were collected for 26 villages in the Chhindwara District, M.P. India during May 2006. The saturation index was computed for the selected samples in the region, which suggest that generally most of the minerals are saturated with respect to water. The concentration of fluoride in the region varies from 0.6 to 4.74 rag/l, which is much higher as per the national and international water quality standards. The study also reveals that the fluoride bearing rock formations are the main source of the higher concentration of fluoride in groundwater along with the conjuncture of land use change. Moreover, the area is a hard rock terrain and consists of fractured granites and amygdaloidal and highly jointed compact basalt acting as good aquifer, which is probably enriching the high content of fluoride in groundwater. High concentration of fluoride is found in deeper level of groundwater and it is possible due to rock-water interaction, which requires further detailed investigation. The highly alkaline conditions indicate fluorite dissolution, which works as a major process for higher concentration of fluoride in the study area. The results of this study will ultimately help in the identification of risk areas and taking measures to mitigate negative impacts related to fluoride pollution and toxicity.

关键词： Fluoride rock-water interaction saturation index Madhya Pradesh India

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Dynamics of land use change in a mining area:a case study of Nadowli District,Ghana

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Journal of Mountain Science 2016年第4期13卷 633-642页

作者： Laari Prosper BASOMMI GUAN Qing-feng CHENG Dan-dan sudhir kumar singh School of Environmental Studies China University of Geosciences Department of Environment and Resource Studies UDS School of Information Engineering China University of Geosciences National Engineering Research Center of GIS China University of Geosciences State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences K.Banerjee Centre of Atmospheric and Ocean Studies IIDSNehru Science CentreUniversity of Allahabad

In a developing country like Ghana, the study of land use and land cover change(LULCC) based on satellite imageries still remains a challenge due to cost, resolution and availability with less skilled man power. Existing researches are skewed towards the southerly part of Ghana thereby leaving the Northern sectors uncovered. The maximum likelihood classification(MLC) algorithm was employed for the LULCC between 2000 and 2014 in Nadowli: an area characterized by an upsurge in mining in the Northern belt of Ghana. A spatial-social approach was utilized combining both satellite imagery and socio economic data. Land use transition matrix, land use integrated index/degree indices was used to depict the characters of the change. A semi structured interview, pair wise ranking and key informant interviews were used to correlate the socio economic impact of the different LULC. Overall changes in the landscape showed an increase in bare ground by 19.22%, open savannah by 16.8% whereas closed savanna decreased by 50%. Land use change matrix showed increasing trends of bare ground at the expense of vegetation. The integrated land use index highlighted the bare ground and built up areas rising with a decreasing closed vegetation woodlot. Large farm size are shrinking whiles majority of the people view mining as the main socio economic activity affecting the environment and the reduction in vegetation. This study therefore provides a strategic guide and a baseline data for land use policy actors in the Northern belt of Ghana. This will aid in developing models for future land use change implications in surrounding areas where mining is on the rise.

关键词： Land use Mining Vegetation Satellite imagery Maximum likelihood algorithm

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In-situ condition monitoring of reinforced concrete structures

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Frontiers of Structural and Civil Engineering 2016年第4期10卷 420-437页

作者： Sanjeev kumar VERMA sudhir singh BHADAURIA1 Saleem AKHTAR Department of Civil Engineering Technocrats Institute of Technology Anand Nagar BhopaL Madhya Pradesh India Department of Ctvd Engmeermg Institute of Technology Rajiv Gandhi Technological University Airport Road Bhopal MadhyaPradesh India

Performance of concrete structures is significantly influenced and governed by its durability and resistance to environmental or exposure conditions, apart from its physical strength. It can be monitored, evaluated and predicted through modeling of physical deterioration mechanisms, performance characteristics and parameters and condition monitoring of in situ concrete structures. One such study has been conducted using Non-destructive testing equipment in the city of Bhopal and around located in India. Some selected parameters influencing durability of reinforced concrete （RC） structures such as concrete cover, carbonation depth, chloride concentration, half cell potential and compressive strength have been measured, for establishing correlation among various parameters and age of structures. Effects of concrete cover and compressive strength over the variation of chloride content with time are also investigated.

关键词： concrete carbonation chloride corrosion monitoring models

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Evaluating effect of chloride attack and concrete cover on the probability of corrosion

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Frontiers of Structural and Civil Engineering 2013年第4期7卷 379-390页

作者： Sanjeev kumar VERMA sudhir singh BHADAURIA Saleem AKHTAR Civil Engineering Department University Institute of TechnologyRajiv Gandhi Technological UniversityBHOPAL Madhya Pradesh 462036India S.G.S.Institute of Technology and Science INDORE Madhya Pradesh 452003India

Corrosion of reinforced concrete(RC)structures is one of the significant causes of deterioration of reinforced concrete(RC)*** is a major process governing the initiation and advancement of the injurious corrosion of steel ***,several researches on the chlorination of concrete structures have been ongoing around the *** article reviews several recently performed chlorination studies,and from results of a field survey evaluates the effect of chloride content on the probability of corrosion and the influence of concrete compressive strength on the chloride content and penetration,also evaluates the effect of concrete cover over the chloride content of the RC structures at rebar depth and on the probability of corrosion.

关键词： concrete chloride reinforcement corrosion deterioration cover

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Dragonfly Inspired Nanocomposite Flapping Wing for Micro Air Vehicles

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Journal of Bionic Engineering 2019年第5期16卷 894-903页

作者： David kumar Preetamkumar Marutrao Mohite sudhir Kamle Department of Aerospace Engineering Indian Institute of Technology KanpurKanpur 208016India

The current research is aimed towards the development of dragonfly inspired nanocomposite flapping wing for micro air vehicles(MAVs).The wing is designed by taking inspiration from the hind wing of dragonfly(Anax Parthenope Julius).Carbon nanotubes(CNTs)/polypropylene nanocomposite and low-density polyethylene are used as the wing *** nanocomposites are developed with varying CNTs'weight percentage(0%-1%)and characterized for dynamic mechanical properties,which revealed that the 0.1 weight percentage case produces highest storage modulus values throughout the frequency range(1 Hz一90 Hz).It is also observed that the storage modulus values are in the range ofYoung^modulus of veins and membrane of natural insect *** is useful to achieve true *** manufacturing technique such as photolithography is used for wing *** length,weight and average thickness of the fabricated wing are^44 mm,26.22 mg and 187 pm,*** structural dynamic properties of the fa bricated wing are obtained experimentally and computationally using DIC and ANSYS,*** developed dragonfly inspired wing showed a natural frequency of 29.4 Hz with a bending mode shape which is close to the characteristic frequency of its natural counterpart.

关键词： flapping wings biomimicking nanocomposites MAVs

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Study of synthetic aperture radar and automatic identification system for ship target detection

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Journal of Ocean Engineering and Science 2019年第2期4卷 173-182页

作者： sudhir kumar Chaturvedi Department of Aerospace Engineering University of Petroleum&Energy StudiesDehradun 248007India

In the past,the main goals of Synthetic Aperture Radar(SAR)systems were the study of the interaction of electromagnetic waves with the earth ***,the development of multi-channel SAR systems has enabled the development of more sophisticated techniques for the surveillance *** is the most efficient instrument,which provides high-resolution data for wide ocean area surveillance under all weather *** intrinsic capability of this instrument is to provide a quick view of the oceanic surface features such as vessels,waves and currents,oil spills,laver facilities and wind *** ship detection or recognition is achieved in two steps:the first step is to identify the target in SAR images of a busy traffic,which corresponds to Automatic Identification System(AIS)signals by the“dead-reckoning(DR)position”,and the second step is to estimate the position,size and speed of the ship from SAR images and compare these results with the AIS“true”*** paper presents the fundamentals of SAR and its integration with the AIS data for the ship target detection.

关键词： SAR AIS Dead reckoning Target detection.

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Potential of Essential Oils as Alternative Permeation Enhancers for Transdermal Delivery

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World Journal of Traditional Chinese Medicine 2023年第3期9卷 258-269页

作者： Jayshree Mahanty Sofi Haamid Rasheed sudhir kumar Harjeet singh Alok Sharma Department of Pharmacognosy ISF College of PharmacyMogaPunjab CCRAS Ministry of AYUSHJhansiUttar PradeshIndia

Transdermal drug delivery plays a significant part in the drug delivery system when compared to other routes of drug *** function of the stratum corneum(SC)is a ***,numerous methods have been thrived to improve the perforation of drugs across the *** most effective method is to use enhancers since these agents enhance skin *** penetration enhancers like essential oils demonstrate higher enhancement activity and are more widely accepted than synthetic penetration *** potential in the expansion and interaction with the SC intercellular lipids has led to an increasing interest in these oils as penetration *** article gives an overview of a few essential oils,including their mode of action and important parameters for permeation *** present work can provide essential oils as alternative enhancers,and this could be useful in transdermal administration.

关键词： Essential oil natural permeation enhancers skin stratum corneum transdermal drug delivery

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Assessment of long-term climate variability and its impact on the decadal growth of horticultural crops in central India

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Ecological Processes 2022年第1期11卷 862-889页

作者： Gaurav Sharma Amita Sharma Nishant kumar Sinha Om Prakash Sharma Ashutosh singh Ajai kumar Pandey Abhishek kumar sudhir kumar Trivedi Bharti Sao Mukesh kumar Sahu College of Horticulture and Forestry Rani Lakshmi Bai Central Agricultural UniversityJhansiUttar Pradesh 284003India Department of Environmental Science Rajmata Vijayaraje Scindia Krishi VishwavidyalayaGwaliorMadhya Pradesh 474002India Division of Soil Physics Indian Institute of Soil ScienceBhopalMadhya Pradesh 462038India Department of Floriculture and Landscape Architecture Indira Gandhi Krishi VishwavidyalayaRaipurChhattisgarh 492012India

Background:The impact of climate change on horticultural production is of utmost concern *** such vulnerable region of horticultural importance is the Madhya Pradesh state in the central part of *** is crucial to analyse the long-term trend in climatic variations and its effect on horticultural crop ***,this study focuses on detecting trends in mean annual precipitation and temperature of 115 years for the 15 districts covering all the regions of the state as well as projections of all the Representative Concentration Pathway(RCP)climatic scenarios for 2050 and 2080 of Madhya Pradesh *** decadal(2010–2020)insight into the area and production of horticultural crops is undertaken which will help forecasting the future growth *** a better insight,case study on four horticultural crops is undertaken to assess their decadal growth trend vis-à-vis climate parameters in these 15 ***:The Mann–Kendall test for 1901–2016 and Sen’s slope indicated a non-significant change in long-term trend for precipitation except for increasing change in Khargone and decreasing change in Rewa ***-cant increasing trend of average temperature is obtained for Hoshangabad,Jabalpur,Sagar and Rewa *** Sen’s slope indicated an increase of 0.005 to 0.009℃for maximum temperature and 0.005 to 0.012℃for minimum temperature *** projections of all the RCP climate scenarios for the years 2050 and 2080 indicated non-significant variation in precipitation but an increase in maximum(1.4 to 4.1℃)and minimum(1.45 to 4.65℃)annual *** increasing trend in area and production for horticultural crops is also observed in central India for the study *** is yield increase in all the crops selected in case study except for potato,which recorded a decreased yield between the years 2010–***:The Mann–Kendall test and projections indicate towards climate change with a temperature *** the decad

关键词： Climate change Horticulture Madhya Pradesh Precipitation Temperature Trend analysis

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Fractionally Delayed Kalman Filter

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 169-177页

作者： Abhinoy kumar singh Discipline of Electrical Engineering Indian Institute of Technology Indore

The conventional Kalman filter is based on the assumption of non-delayed measurements. Several modifications appear to address this problem, but they are constrained by two crucial assumptions: 1) the delay is an integer multiple of the sampling interval, and 2) a stochastic model representing the relationship between delayed measurements and a sequence of possible non-delayed measurements is known. Practical problems often fail to satisfy these assumptions, leading to poor estimation accuracy and frequent track-failure. This paper introduces a new variant of the Kalman filter, which is free from the stochastic model requirement and addresses the problem of fractional *** proposed algorithm fixes the maximum delay(problem specific), which can be tuned by the practitioners for varying delay possibilities. A sequence of hypothetically defined intermediate instants characterizes fractional delays while maximum likelihood based delay identification could preclude the stochastic model requirement. Fractional delay realization could help in improving estimation accuracy. Moreover, precluding the need of a stochastic model could enhance the practical applicability. A comparative analysis with ordinary Kalman filter shows the high estimation accuracy of the proposed method in the presence of delay.

关键词： Gaussian likelihood Kalman filter optimal Kalman gain randomly delayed measurements

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Major Development Under Gaussian Filtering Since Unscented Kalman Filter

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IEEE/CAA Journal of Automatica Sinica 2020年第5期7卷 1308-1325页

作者： Abhinoy kumar singh IEEE Department of Electrical Engineering Indian Institute of Technology Indore

Filtering is a recursive estimation of hidden states of a dynamic system from noisy *** problems appear in several branches of science and technology,ranging from target tracking to biomedical monitoring.A commonly practiced approach of filtering with nonlinear systems is Gaussian *** early Gaussian filters used a derivative-based implementation,and suffered from several drawbacks,such as the smoothness requirements of system models and poor stability.A derivative-free numerical approximation-based Gaussian filter,named the unscented Kalman filter(UKF),was introduced in the nineties,which offered several advantages over the derivativebased Gaussian *** the proposition of UKF,derivativefree Gaussian filtering has been a highly active research *** paper reviews significant developments made under Gaussian filtering since the proposition of *** review is particularly focused on three categories of developments:i)advancing the numerical approximation methods;ii)modifying the conventional Gaussian approach to further improve the filtering performance;and iii)constrained filtering to address the problem of discrete-time formulation of process *** review highlights the computational aspect of recent developments in all three *** performance of various filters are analyzed by simulating them with real-life target tracking problems.

关键词： Bayesian framework cubature rule-based filtering Gaussian filters Gaussian sum and square-root filtering nonlinear filtering quadrature rule-based filtering unscented transformation

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