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Application of pressure-state-response approach for developing criteria and indicators of ecological health assessment of wetlands:a multi-temporal study in Ichhamati floodplains,India

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Ecological Processes 2023年第1期12卷 475-494页

作者： Jibananda Gayen debajit Datta Department of Geography Jadavpur UniversityKolkata 700032India Department of Geography Sree Chaitanya CollegeHabra 743268India

Background Tropical floodplain wetlands are among the most disturbed and intensively harvested *** sustainable management is often hindered due to the lack of comprehensive,coherent,and standardized assessment frameworks of wetland ecological health(WEH).In this study,a set of appropriate criteria and indicators(C&I)of WEH assessment was developed and tested on seven wetlands of River Ichhamati,eastern *** Based on the pressure-state-response(PSR)approach,evaluation indicators representing ecological,socio-economic,and institutional sustainability issues of floodplain wetland systems were either selected or formulated through literature survey and stakeholder *** of indicators were assigned by the entropy weighting method and then used in the Technique for Order of Preference by Similarity to Ideal Solution model to determine the Euclidean distances of each wetland from the positive ideal solution and negative ideal ***,a comprehensive wetland ecological health index(CWEHI)was constructed from these distances to portray the condition of any PSR system component in a wetland under a fivefold classification scheme,namely‘excellent health’(CWEHI≥0.81),‘good health’(0.61-0.80),‘moderate health’(0.41-0.60),‘weak health’(0.21-0.40),and‘morbid’(≤0.20).Results The developed C&I set contains 8 criteria and 38 indicators under pressure component,7 criteria and 49 indicators under state component,as well as 4 criteria and 18 indicators under response *** applied in 2016 and 2022,it was found that the Panchita and Aromdanga wetlands were continuously in weak and morbid health status,while the Madhabpur wetland always showed an excellent or good status for all *** of other wetlands oscillated between moderate and morbid health across assessment years and system *** The developed C&I set was found to be a flexible,holistic,and refined framework that could be applied elsewhere in sim

关键词： Entropy weighting method Environmental indicator Floodplain wetland TOPSIS Wetland influence zone Wetland ecological health

Analysis of coastal land use/land cover changes in the Indian Sunderbans using remotely sensed data

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Geo-Spatial Information Science 2012年第4期15卷 241-250页

作者： debajit DATTA Shovik DEB Department of Agricultural and Food Engineering Indian Institute of TechnologyKharagpurWest Bengal 721302India Department of Geography Taki Government CollegeTakiWest Bengal 743429India

The world’s largest mangrove ecosystem,the Sunderbans is experiencing multidimensional threats of *** present study was aimed to understand these problems and search for proper remedies by applying suitable remote sensing ***-western parts of Indian Sunderbans Biosphere Reserve had been chosen for assessment of land use/land cover changes in between 1975 and 2006 by using multitemporal Landsat *** indicated considerable reduction of open mangrove stands and associated biodiversity mainly in the forest-habitation interference zones of *** the contrary,increase in the coverage of dense mangroves in the reserved forests had been observed indicating the existence of proper centralized management ***,a cumulative loss of approximately 0.42%of its original mangrove cover in between 1975 and 2006 had been estimated for this part of the Sunderbans which was at parity with the findings of other studies in the Sunderbans or similar mangrove ecosystems of the *** of non agricultural lands in the last two decades was found to be related with the growth of new settlements,tourism infrastructure,and *** transformation was attributed to the shifting of local peoples’interest from traditional forestry and subsistence farming towards alternative occupations like shrimp culture,coastal tourism,and commercial fishing although environmentally hazardous livelihood activities like collection of prawn seeds along the riverbanks were still persistent.

关键词： sustainable mangrove management landsat data land use/land cover changes

Inhibitor-Based Therapeutics for Treatment of Viral Hepatitis

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Journal of Clinical and Translational Hepatology 2016年第3期4卷 248-257页

作者： debajit Dey Manidipa Banerjee kusuma School of Biological Sciences Indian Institute of Technology Delhi Hauz Khas New Delhi India

Viral hepatitis remains a significant worldwide threat,in spite of the availability of several successful therapeutic and vaccination *** associated with acute and chronic infections,such as liver failure,cirrhosis and hepatocellular carcinoma,are the cause of considerable morbidity and *** the significant burden on the healthcare system caused by viral hepatitis,it is essential that novel,more effective therapeutics be *** present review attempts to summarize the current treatments against viral hepatitis,and provides an outline for upcoming,promising new *** of novel therapeutics requires an understanding of the viral life cycles and viral effectors in molecular *** such,this review also discusses virallyencoded effectors,found to be essential for virus survival and replication in the host milieu,which may be utilized as potential candidates for development of alternative therapies in the future.

关键词： viral hepatitis Viroporin Inhibitor

Spatially explicit estimation of soil organic carbon stock of an estuarine mangrove wetland of eastern India using elemental analysis and very-fine resolution satellite data

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Ecological Processes 2022年第1期11卷 411-426页

作者： debajit Datta Madhumita Bairagi Mansa Dey Argha Pratim Pal Jibananda Gayen Department of Geography Jadavpur UniversityKolkata 700032India Department of Geography Sree Chaitanya CollegeHabra 743268India

Background:This study estimated the total soil organic C(SOC)stock of the wetland influence zone of Bichitrapur mangroves in eastern India in a spatially explicit *** spatial and vertical distribution of SOC densities with respect to land use/land cover(LULC)pattern were ***,some site-specific management strate-gies were forwarded towards enhancement of C sequestration ***:The changing patterns of LULC within the wetland influence zone of the site were analyzed using Landsat TM(30 m)and Pleiades-1A(2 m)imageries from 1988 to ***-specific SOC measurement was done using samples taken from four core-depth intervals(viz.D1:0–20 cm,D2:20–40 cm,D3:40–70 cm,D4:70–100 cm)at 89 locations belonging to different LULC *** interpolation was applied on this point-based data to produce SOC density and stock models as a whole and at all *** between SOC density,core-depth and present LULC were evaluated through multivariate statistical ***:The LULC transformations during last three decades suggested the gradual growth of mangrove plantations as well as agricultural and aquacultural *** amount of SOC was concentrated in D1(37.17%)followed by D3(26.51%),while D4 had the lowest(10.87%).The highest mean SOC density was observed in the dense mangrove patches(248.92 Mg ha^(−1))and the lowest mean was in the Casuarina plantations(2.78 Mg ha^(−1)).Here,Spline method emerged as the best-fit interpolation technique to model SOC data(R^(2)=0.74)and estimated total SOC stock of the entire wetland influence zone as 169,569.40 Mg and the grand mean as 125.56 Mg ha^(−1).Overall,LULC was inferred as a major determinant of SOC dynamics with a statistically significant effect(p<0.001),whereas no such inference could be drawn for soil ***:The C sequestration potential of sites such as the present one could be increased with appropriate zone-wise plantation strategies,restrict

关键词： Blue C density Core-depth Coastal wetland Dry combustion Land use conversion Wetland influence zone

An Efficient Sound and Data Steganography Based Secure Authentication System

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Computers, Materials & Continua 2021年第4期67卷 723-751页

作者： debajit Datta Lalit Garg kathiravan Srinivasan Atsushi Inoue G.Thippa Reddy M.Praveen kumar Reddy k.Ramesh Nidal Nasser School of Computer Science and Engineering Vellore Institute of Technology(VIT)Vellore632014India Faculty of Information and Communication Technology University of MaltaMsidaMSD2080Malta School of Information Technology and Engineering Vellore Institute of Technology(VIT)Vellore632014India Department of Information Systems&Business Analytics Eastern Washington UniversitySpokaneWA99202USA Department of Computer Science Karnataka State Akkamahadevi Women’s UniversityVijayapuraIndia College of Engineering Alfaisal UniversityRiyadh1153Saudi Arabia

The prodigious advancements in contemporary technologies have also brought in the situation of unprecedented ***,the pin-based security system is an inadequate mechanism for handling such a *** reason is that hackers use multiple strategies for evading security systems and thereby gaining access to private *** research proposes to deploy diverse approaches for authenticating and securing a connection amongst two devices/gadgets via sound,thereby disregarding the pins’manual ***,the results demonstrate that the proposed approaches outperform conventional pin-based authentication or QR authentication ***,a random signal is encrypted,and then it is transformed into a wave file,after which it gets transmitted in a short burst via the device’s ***,the other device/gadget captures these audio bursts through its microphone and decrypts the audio signal for getting the essential data for ***,this model requires two devices/gadgets with speakers and a microphone,and no extra hardware such as a camera,for reading the QR code is *** first module is tested with realtime data and generates high scores for the widely accepted accuracy metrics,including precision,Recall,F1 score,entropy,and mutual information(MI).Additionally,this work also proposes a module helps in a secured transmission of sensitive data by encrypting it over images and other *** steganographic module includes two-stage encryption with two different encryption algorithms to transmit data by embedding inside a *** encryption algorithms and their combinations are taken for this system to compare the resultant file *** these systems engender high accuracies and provide secure connectivity,leading to a sustainable communication ecosystem.

关键词： Cyber-attacks signals privacy security organization encryption decryption authentication effective communication steganography

Entropy contributions to phase stability in binary random solid solutions

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npj Computational Materials 2018年第1期4卷 262-271页

作者： Anus Manzoor Shubham Pandey debajit Chakraborty Simon R.Phillpot Dilpuneet S.Aidhy Department of Mechanical Engineering University of WyomingLaramieWY 82071USA Department of Materials Science and Engineering University of FloridaGainesvilleFL 32611USA

High entropy alloys contain multiple elements in large proportions that make them prone to phase *** alloys generally have shallow enthalpy of mixing which makes the entropy contributions of similar *** a result,the phase stability of these alloys is equally dependent on enthalpy and entropy of mixing and understanding the individual contribution of thermodynamic properties is *** the overall vision of designing high entropy alloys,in this work,using density functional theory calculations,we elucidate the contributions of various entropies,i.e.,vibrational,electronic and configurational towards the phase stability of binary *** show that the contribution of electronic entropy is very small compared to the vibrational and configurational entropies,and does not play a significant role in the phase stability of *** configurational and vibrational entropies can either destabilize or can collectively contribute to stabilize the solid *** a result,even those systems that have negative mixing enthalpy can show phase instability,revealed as a miscibility gap;conversely,systems with positive mixing enthalpy can be phase stable due to entropic *** suggest that including entropic contributions are critical in the development of theoretical framework for the computational prediction of stable,single-phase high entropy alloys that have shallow mixing enthalpies,unlike ordered intermetallics.

关键词： alloys stability mixing

Implication of ultrasound bladder parameters on treatment response in patients with benign prostatic hyperplasia under medical management

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Asian Journal of Urology 2015年第4期2卷 233-237页

作者： Rajeev Thekumpadam Puthenveetil debajit Baishya Sasanka Barua Debanga Sarma Department of Urology Gauhati Medical College HospitalGuwahatiAssamIndia

Objective:The prevalence of benign prostatic hyperplasia(BPH)rapidly increases after the 4th decade of *** combination of tamsulosin and dutasteride is a well established therapy for BPH of40 ***-invasive urodynamic parameters can predict the outcome of medical therapy in patients with *** aimed to correlate these parameters with treatment responses in BPH patients under medical ***:A prospective study was conducted in the Department of Urology in our hospital from May 2014 to April 2015.A total of 100 patients with BPH40 g who fulfilled our inclusion criteria were *** responses were determined by the International Prostate Symptom Score(IPSS)and *** ultrasonography with Doppler was performed to measure prostate volume,intravesical prostatic protrusion(IPP),detrusor wall thickness(DWT),the prostatic capsular artery resistive index(RI)and prostatic urethral angle(PUA)before and 3 months after combination therapy of tamsulosin and *** responses were correlated with non-invasive urodynamic ***:The IPSS,uroflow,age,prostate volume,RI,IPP,DWT and PUA were correlated before and after *** the 100 patients,70(70%)showed significant improvement and 30(30%)showed no improvement with ***:Ultrasound bladder parameters are useful tools for measuring the treatment response in BPH *** study shows that RI and DWT significantly correlate with the treatment response in BPH *** importantly,pretreatment values of increased IPP and PUA determines the non-improvement of symptoms in BPH *** study suggests the importance of transabdominal ultrasonography(kUBeP)with Doppler for evaluating treatment responses to medical management.

关键词： Benign prostatic hyperplasia Uroflowmetry Tamsulosin Ultrasonography Prostatic urethral angle

Rainfall Forecasting Using Machine Learning Algorithms for Localized Events

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Computers, Materials & Continua 2022年第6期71卷 6333-6350页

作者： Ganapathy Pattukandan Ganapathy kathiravan Srinivasan debajit Datta Chuan-Yu Chang Om Purohit Vladislav Zaalishvili Olga Burdzieva Centre for Disaster Mitigation and Management Vellore Institute of TechnologyVellore632014India School of Computer Science and Engineering Vellore Institute of TechnologyVellore632014India Department of Computer Science and Information Engineering National Yunlin University of Science and TechnologyYunlin64002Taiwan Service Systems Technology Center Industrial Technology Research InstituteHsinchuTaiwan School of Information Technology and Engineering Vellore Institute of TechnologyVellore632014India Geophysical Institute of Vladikavkaz Scientific Centre Russian Academy of Sciences(RAS)VladikavkazRussian Federation

A substantial amount of the Indian economy depends solely on ***,on the other hand,plays a significant role in agriculture–while an adequate amount of rainfall can be considered as a blessing,if the amount is inordinate or scant,it can ruin the entire hard work of the *** this work,the rainfall dataset of the Vellore region,of Tamil Nadu,India,in the years 2021 and 2022 is forecasted using several machine learning *** engineering has been performed in this work in order to generate new features that remove all sorts of autocorrelation present in the *** removal of autocorrelation,the data could be used for performing operations on the time-series data,which otherwise could only be performed on any other regular regression *** work uses forecasting techniques like the AutoRegessive Integrated Moving Average(ARIMA)and exponential smoothening,and then the time-series data is further worked on using Long Short Term Memory(LSTM).Later,regression techniques are used by manipulating the *** work is benchmarked with several evaluation metrics on a test dataset,where XGBoost Regression technique outperformed the *** uniqueness of this work is that it forecasts the daily rainfall for the year 2021 and 2022 in Vellore *** work can be extended in the future to predict rainfall over a bigger region based on previously recorded time-series data,which can help the farmers and common people to plan accordingly and take precautionary measures.

关键词： Time-series ARIMA LSTM regression rainfall

Unusual case of nephrocutaneous fistula--Our experience

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Asian Journal of Urology 2016年第1期3卷 56-58页

作者： Rajeev Thekumpadam Puthenveetil debajit Baishya Sasanka Barua Debanga Sarma Department of Urology Gauhati Medical College HospitalGuwahatiAssamIndia

A rare case of nephrococutaneous fistula due to spontaneous expulsion of renal calculi is described.A 45-year-old man presented with urinary leakage from an ulcer over the left lumbar region for the last 3 months after a history of spontaneous expulsion of stones from this *** abdomen revealed a small contracted kidney with multiple calculi in the kidney and renal pelvis,sinus tract from the lower pole of the left kidney with a ruptured calyceal calculus in the sinus *** urography revealed a non excreting left kidney with multiple renal calculi,with hyperdense collection in the renal parenchyma extending to the subcutaneous tissue and left lung suggesting a xenthogranulomatous pyelonephritis(XGP).We performed a left-sided simple nephrectomy with excision of the fistulous *** examination revealed *** have been a few case reports of XGP forming nephrocutaneous fistula in the back.

关键词： Renal calculus Nephrocutaneous fistula Xenthogranulomatouse pyelonephritis