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In situ formation of bimetallic FeNi nanoparticles on sand through green technology:Application for tetracycline removal

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Frontiers of Environmental Science & Engineering 2020年第1期14卷 185-197页

作者： Ravikumar KVG debayan Ghosh M rudula Pulimi Chandrasekaran Natarajan Amitava Mukherjee Centre for Nanobiotechnology VITVelloreTamil NaduIndia

In this study,FeNi nanoparticles were green synthesized using Punica granatum(pomegranate)peel extract,and these nanoparticles were also formed in situ over quartz sand(GS-FeNi)for removal of tetracycline(TC).Under the optimized operating conditions,(GS-FeNi concentration:1.5%w/v;concentration of TC:20 mg/L;interaction period:180 min),99±0.2%TC removal was achieved in the batch reactor The removaT capacity was 181±1 mg/g.A detailed characterization of the sorbent and the solution before and after the interaction revealed that the removal mechanism(s)involved both the sorption and degradation of *** reusability of reactant was assessed for four cycles of operation,and 77±4%of TC removal was obtained in the *** judge the environmental sustainability of the process,residual toxicity assay of the interacted TC solution was performed with indicator bacteria(Bacillus and Pseudomonas)and algae(Chlorella sp.),which confirmed a substantial decrease in the *** continuous column studies were undertaken in the packed bed reactors using *** the optimized conditions,quite high removal efficiency(978±5 mg/g)was obtained in the *** application of GS-FeNi for antibiotic removal was further evaluated in lake water,tap water,and ground water spiked with TC,and the removal capacity achieved was found to be 781±5,712±5,and 687±3 mg/g,*** work can pave the way for treatment of antibiotics and other pollutants in the reactors using novel green composites prepared from fruit wastes.

关键词： GS-FeNi nanoparticles Tetracycline removal Re-usability Residual toxicity Column studies

Target-site mediated insecticide resistance in major mosquito(Diptera:Culicidae)vectors:A systematic review

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Asian Pacific Journal of Tropical Medicine 2024年第11期17卷 481-490,I0001-I0028页

作者： Subhajit Das Abhirup Saha Prapti Das debayan Raha Dhiraj Saha Insect Biochemistry and Molecular Biology Laboratory Department of ZoologyUniversity of North BengalRaja RammohunpurP.O.NBUDarjeelingWest Bengal734013India

The use of insecticides remain the most effective vector control approach for mosquito borne diseases like malaria,dengue fever,chikungunya,and Zika virus disease;however,their increasing resistance has complicated the *** in kdr,ace-1/ace-2,rdl,and nAChR,are involved in target-site mediated resistance and prevent the binding of pyrethroids and dichlorodiph enyltrichloroethane,organophosphorus pesticide,carbamates and cyclodienes,***,we review the current knowledge on target-site mediated insecticidal resistance mechanisms in major mosquito vectors and the techniques used to identify these *** results showed that kdr mutations are frequently reported in mosquito species,indicating the overuse of pyrethroid in mosquito *** on ace mutations is very limited,primarily detected in Anopheles and Culex,with extremely low detection rate in Aedes,despite the wide application of organophosphates in their ***,reports of rdl mutations and changes in nAChR are rare,which provides an opportunity to exploit these target sites,particularly in the event of disease *** various detection methods such as RFLP,TaqMan,Multiplex PCR and FRET,allele-specific PCR is mostly employed,especially in detecting kdr ***,allele-specific PCR cannot detect novel *** a result,there is an urgent need to develop a scalable,cost-effective tool that can be widely applied especially as these mutations are genetic markers for early detection of insecticide *** monitoring methods remain critical to manage insecticide resistance and effective control of mosquito-borne diseases.

关键词： Mosquito Culex Anopheles Aedes Insecticide resistance kdr Acetylcholinesterase GABAA receptor

High-cycle fatigue behavior of friction stir butt welded 6061 aluminium alloy

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Transactions of Nonferrous Metals Society of China 2014年第3期24卷 648-656页

作者： Hrishikesh DAS debayan CHAKRABORTY Tapan KUMAR PAL Welding Technology Centre Metallurgical and Material Engineering DepartmentJadavpur University

Friction stir welding （FSW） of 6061 aluminium alloy butt joint was carried out at each rotation speed of 600, 800, 1000, 1200 r/min for two different travel speeds, 80 and 100 mm/min, at a constant probe depth of 1.85 mm. The calculated energy input based on the FSW parameters studied shows that the ultimate tensile strength （UTS） of the butt joint is obtained within a certain range of energy input of 297 kJ to 354 kJ out of total range of energy input studied from 196 kJ to 405 kJ. The fatigue behaviors of high-strength and low-strength joints performed at different stress ratios, i.e., 0.5, 0.3, 0.1, -0.3, -0.5, indicate that the fatigue behaviors of both the welds are sensitive to the microstructural features, such as stir zone （SZ）, thermo mechanically affected zone （TMAZ） and heat affected zone （HAZ）. The observed fatigue strengths were discussed in terms of the microstructure, crack path behavior and fracture surface.

关键词： Al alloy friction stir welding (FSW) high cycle fatigue stress ratio (R-ratio) crack path

Adversarial Attacks and Defenses in Images, Graphs and Text: A Review

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International Journal of Automation and computing 2020年第2期17卷 151-178页

作者： Han Xu Yao Ma Hao-Chen Liu debayan Deb Hui Liu Ji-Liang Tang Anil K.Jain Department of Computer Science and Engineering Michigan State UniversityMichigan 48823USA

Deep neural networks(DNN)have achieved unprecedented success in numerous machine learning tasks in various ***,the existence of adversarial examples raises our concerns in adopting deep learning to safety-critical *** a result,we have witnessed increasing interests in studying attack and defense mechanisms for DNN models on different data types,such as images,graphs and ***,it is necessary to provide a systematic and comprehensive overview of the main threats of attacks and the success of corresponding *** this survey,we review the state of the art algorithms for generating adversarial examples and the countermeasures against adversarial examples,for three most popular data types,including images,graphs and text.

关键词： Adversarial example model safety robustness defenses deep learning

1-Way Multihead Quantum Finite State Automata

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Applied Mathematics 2016年第9期7卷 1005-1022页

作者： debayan Ganguly Kingshuk Chatterjee Kumar Sankar Ray Electronics and Communication Sciences Unit Indian Statistical Institute Kolkata India

1-way multihead quantum finite state automata (1QFA(k)) can be thought of modified version of 1-way quantum finite state automata (1QFA) and k-letter quantum finite state automata (k-letter QFA) respectively. It has been shown by Moore and Crutchfield as well as Konadacs and Watrous that 1QFA can’t accept all regular language. In this paper, we show different language recognizing capabilities of our model 1-way multihead QFAs. New results presented in this paper are the following ones: 1) We show that newly introduced 1-way 2-head quantum finite state automaton (1QFA(2)) structure can accept all unary regular languages. 2) A language which can’t be accepted by 1-way deterministic 2-head finite state automaton (1DFA((2)) can be accepted by 1QFA(2) with bounded error. 3) 1QFA(2) is more powerful than 1-way reversible 2-head finite state automaton (1RMFA(2)) with respect to recognition of language.

关键词： 1-Way Quantum Finite State Automaton (1QFA) k-Letter Quantum Finite State Automata (k-Letter QFA) 1-Way Multihead Quantum Finite State Automaton (1QFA(k)) 1-Way Deterministic 2-Head Finite State Automaton (1DFA((2)) 1-Way Reversible Multihead Finite State Automaton (1RMFA(k))

Equivalence of Subclasses of Two-Way Non-Deterministic Watson Crick Automata

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Applied Mathematics 2013年第10期4卷 26-34页

作者： Kumar Sankar Ray Kingshuk Chatterjee debayan Ganguly Electronics and Communication Science Unit ISI Kolkata India

Watson Crick automata are finite automata working on double strands. Extensive research work has already been done on non deterministic Watson Crick automata and on deterministic Watson Crick automata. Parallel Communicating Watson Crick automata systems have been introduced by E. Czeziler et al. In this paper we discuss about a variant of Watson Crick automata known as the two-way Watson Crick automata which are more powerful than non-deterministic Watson Crick automata. We also establish the equivalence of different subclasses of two-way Watson crick automata. We further show that recursively enumerable (RE) languages can be realized by an image of generalized sequential machine (gsm) mapping of two-way Watson-Crick automata.

关键词： Non-Deterministic Watson Crick Automata Two-Way Non-Deterministic Watson Crick Automata RE Languages

Computerized White Matter and Gray Matter Extraction from MRI of Brain Image

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Journal of Biomedical Science and Engineering 2015年第9期8卷 582-589页

作者： Sudipta Roy debayan Ganguly Kingshuk Chatterjee Samir Kumar Bandyopadhyay Department of Computer Science and Engineering Academy of Technology Adisaptagram India E.C.S.U Indian Statistical Institute Kolkata India Department of Computer Science and Engineering University of Calcutta Kolkata India

Automated segmentation of white matter (WM) and gray matter (GM) is a very important task for detecting multiple diseases. The paper proposed a simple method for WM and GM extraction form magnetic resonance imaging (MRI) of brain. The proposed methods based on binarization, wavelet decomposition, and convexhull produce very effective results in the context of visual inspection and as well as quantifiably. It tested on three different (Transvers, Sagittal, Coronal) types of MRI of brain image and the validation of experiment indicate accurate detection and segmentation of the interesting structures or particular region of MRI of brain image.

关键词： Automated Segmentation Convexhull Relative Area White Matter Gray Matter Standard Deviation

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科技纵览 2020年第12期 44-49页

作者： Shreyas Sen Shovan Maity debayan Das 不详

2007年,美国前副总统迪克·切尼命令医生关闭所有与他的联网起搏器相连的无线信号。切尼后来说,这一决定是为了防止恐怖分子入侵他的心脏起搏器,给他的心脏致命电击。切尼给医生下达的命令也许有点过于谨慎了,但无线连接的医疗设备确实... 详细信息

2007年,美国前副总统迪克·切尼命令医生关闭所有与他的联网起搏器相连的无线信号。切尼后来说,这一决定是为了防止恐怖分子入侵他的心脏起搏器,给他的心脏致命电击。切尼给医生下达的命令也许有点过于谨慎了,但无线连接的医疗设备确实曾有被利用的漏洞。

关键词：医疗设备心脏起搏器切尼无线连接无线信号医生恐怖分子