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An architecture for digital hate content reduction with mobile edge computing

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Digital Communications and Networks 2020年第2期6卷 217-222页

作者： Naganna Chetty sreejith Alathur National Institute of Technology karnataka SurathkalMangalore575025India

Mobile devices with social media applications are the prevalent user equipment to generate and consume digital hate *** objective of this paper is to propose a mobile edge computing architecture for regulating and reducing hate content at the user's *** this regard,the profiling of hate content is obtained from the results of multiple studies by quantitative and qualitative *** resulted in different categories of hate content caused by gender,religion,race,and *** on this information,an architectural framework is developed to regulate and reduce hate content at the user's level in the mobile computing *** proposed architecture will be a novel idea to reduce hate content generation and its impact.

关键词： Hate content Mobile edge computing Framework Regulation Social media

Ultra-fast microwave aided synthesis of gold nanocages and structural maneuver studies

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Nano Research 2017年第3期10卷 1078-1091页

作者： sreejith Raveendran Anindito Sen Toru Maekawa D. Sakthi kumar Bio-Nano Electronics Research Centre Graduate School of Interdisciplinary New Science Toyo University 2100 Kujirai Kawagoe Saitama 350-8585 Japan JEOL Ltd. 13F Ohtemachi Nomura Building 2-1-10htemachi Chiyoda-Ku. Tokyo 100-0004 Japan

Gold nanocages （AuNcgs） are well-studied, hollow, metallic nanostructures that have fascinated researchers in the fields of nanotechnology, materials science, photoelectronics, biotechnology, and medical science for the last decade. However, the time-consuming synthesis of AuNcgs has limited their widespread use in materials science and nano-biotechnology. A novel, ultra-fast, simple, and highly convenient method for the production of AuNcgs using microwave heating is demonstrated herein. This quick method of AuNcg synthesis requires mild laboratory conditions for large-scale production of AuNcgs. The microwave heating technique offers the advantage of precise mechanical control over the temperature and heating power, even for the shortest reaction period （i.e., seconds）. Microwave-synthesized AuNcgs were compared with conventionally synthesized AuNcgs. Structural maneuver studies employing the conventionally produced AuNcgs revealed the formation of screw dislocations and a shift in the lattice plane. Detailed characterization of the microwave-generated AuNcgs was performed using high resolution transmission electron microscopy （HRTEM）, scanning electron microscopy （SEM）, X-ray powder diffraction （XRD）, and spectroscopic techniques.

关键词： gold nanocages nanocages nanoboxes microwave technology ultra-fast screw dislocation

A Robust Fractional Order Fuzzy P ＋ Fuzzy I ＋ Fuzzy D Controller for Nonlinear and Uncertain System

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International Journal of Automation and computing 2017年第4期14卷 474-488页

作者： Vineet kumar k. P. S. Rana Jitendra kumar Puneet Mishra sreejith S Nair Division of Instrumentation and Control Engineering Netaji Subhas Institute of Technology (NSIT) University of Delhi New Delhi 110078 India

In this paper, a robust fractional order fuzzy P ＋ fuzzy I ＋ fuzzy D （FOFP ＋ FOFI ＋ FOFD） controller is presented for a nonlinear and uncertain 2-1ink planar rigid manipulator. It is a nonlinear fuzzy controller with variable gains that makes it self- adjustable or adaptive in nature. The fractional order operators further make it more robust by providing additional degrees of freedom to the design engineer. The integer order counterpart, fuzzy P ＋ fuzzy I ＋ fuzzy D （FP ＋ FI ＋ FD） controller, for a comparative study, was realized by taking the integer value for the fractional order operators in FOFP ＋ FOFI ＋ FOFD controller. The performances of both the fuzzy controllers are evaluated for reference trajectory tracking and disturbance rejection with and without model uncertainty and measurement noise. Genetic algorithm was used to optimize the parameters of controller under study for minimum integral of absolute error. Simulation results demonstrated that FOFP ＋ FOFI ＋ FOFD controller show much better performance as compared to its counterpart FP ＋ FI ＋ FD controller in servo as well as the regulatory problem and in model uncertainty and noisy environment FOFP ＋ FOFI ＋ FOFD controller demonstrated more robust behavior as compared to the FP ＋ FI ＋ FD controller. For the developed controller bounded-input and bounded-output stability conditions are also developed using Small Gain Theorem.

关键词： Fuzzy P + fuzzy I + fuzzy D (FP + FI + FD) controller fractional order fuzzy P + fuzzy I + fuzzy D (FOFP + FOFI+ FOFD) controller fractional order operator robust control model uncertainty noise suppression.

Phytochemical,Anti-oxidant and Anthelmintic activities of various leaf extracts of Flacourtia sepiaria Roxb

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Asian Pacific Journal of Tropical Biomedicine 2013年第12期3卷 947-953页

作者： M sreejith N kannappan A Santhiagu Ajith P Mathew Department of Pharmaceutical Chemistry National College of Pharmacy Department of Pharmacy Annamalai University Department of Biotechnolgy National Institute of Technolgy Department of Pharmacology National College of Pharmacy

Objective:The present study was carried out to investigate the phytochemical constituents,in vitro antioxidant potential and anthelmintic activities of Flacourtia sepiaria Roxb ***:The dried powdered leaves of Flacourtia sepiaria were extracted using petroleum ether,chloroform,ethyl acetate and methanol by a soxhlet extractor and preliminary phytochemical screening was performed using standard *** the extract was evaluated for their potential antioxidant activities using test such as DPPH,superoxide anion radical,hydroxyl radical,nitric oxide radical scavenging abilities,ferrous chelating ability and total phenolic and flavanoid *** activity of extract was screened in adult Indian earthworm ***:Preliminary screening revealed the presence of bioactive compounds especially phenolics,tannins and terpenoids in all *** phenolic and flavanoid content was highest in methanolic extract and lowest in petroleum ether *** paralytic(9.4610.212)and death time(31.43±1.148)of methanolic extract was found to be significant(P<0.05)when compared with paralytic(7.33±0.206)and death lime(18.60±0.229)of standard piperazine citrate at 100 mg/mL ***:The results of the present study indicate that the leaf extracts of Flacourtia sepiaria exhibited strong antioxidant activity and possess significant anthelmintic activity and thus it is a good source of antioxidant and anthelmintic constituents.

关键词： Antioxidant Anthelmintic Flacourtia sepiaria Piperazine citrate

Response of the low-pressure hot-filament discharge plasma to a positively biased auxiliary disk electrode

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Plasma Science and Technology 2022年第1期24卷 53-60页

作者： Mangilal CHOUDHARY Poyyeri kunnath sreejith Institute of Advanced Research KobaGandhinagarGujarat 382426India Indian Institute of Technology Madras ChennaiTamil Nadu 600036India

In a steady-state plasma,the loss rate of plasma particles to the chamber wall and surfaces in contact with plasma is balanced by the ionization rate of background neutrals in the hot-filament *** balance between the loss rate and ionization rate of plasma particles(electrons and ions)maintains quasi-neutrality of the bulk *** the presence of an external perturbation,it tries to retain its quasi-neutrality *** this work,we studied how the properties of bulk plasma are affected by an external DC potential *** auxiliary biased metal disk electrode was used to introduce a potential perturbation to the plasma medium.A single Langmuir probe and an emissive probe,placed in the line of the discharge axis,were used for the characterization of the bulk *** is observed that only positive bias to the auxiliary metal disk increases the plasma potential,electron temperature,and plasma density but these plasma parameters remain unaltered when the disk is biased with a negative potential with respect to plasma *** observed plasma parameters for two different-sized,positively as well as negatively biased,metal disks are compared and found inconsistent with the existing theoretical model at large positive bias *** role of the primary energetic electrons population in determining the plasma parameters is *** experimentally observed results are qualitatively explained on the basis of electrostatic confinement arising due to the loss of electrons to a biased metal disk electrode.

关键词： hot-filament discharge plasma response plasma parameters positively biased electrode

A topologically substituted boron nitride hybrid aerogel for highly selective CO2 uptake

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Nano Research 2018年第12期11卷 6325-6335页

作者： R.Govindan kutty Sivaramapanicker sreejith Xianghua kong Haiyong He Hong Wang Junhao Lin kazu Suenaga Chwee Teck Lim Yanli Zhao Wei Ji Zheng Liu Center for Programmable Materials School of Materials Sdence and EngineeringNanyang Technological UniversitySO Nanyang Avenue639798Singapore School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Center for Advanced 2D Materials and Graphene Research Center National University of Singapore6Science Drive 2Singapore117546Singapore Biomedical Institute for Global Health Research and Technology National University of Singapore14Medical DriveSingapore 117599Singapore Department of Physics and Beijing key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices Renmin University of ChinaBeijing 100872China National Institute of Advanced Industrial Science and Technology (AIST) AIST Central 5Tsukuba305-8565-Japan Division of Chemistry and Biological Chemistry School of Physical and Mathematical SciencesNanyang Technological University21-Nanyang LinkSingapore 637371Singapore Department of Biomedical Engineering National University of SingaporeSingapore 117543Singapore

A topologically mediated synthesis of porous boron nitride aerogel has been experimentally and theoretically investigated for carbon dioxide (CO2) uptake. Replacement of the carbon atoms in a precursor aerogel of graphene oxide and carbon nanotubes was achieved using an elemental substitution reaction, to obtain a boron and nitrogen framework. The newly prepared BN aerogel possessed a specific surface area of 716.56 m2/g and exhibited an unprecedented twentyfold increase in CO2 uptake over N2, adsorbing 100 cc/g at 273 k and 80 cc/g in ambient conditions, as verified by adsorption isotherms via the multipoint Brunauer-Emmett-Teller (BET) method. Density functional theory calculations were performed to give hints on the mechanism of such high selectivity of CO2 over N2 adsorption in BN aerogel, which may be due to the interaction between the intrinsic polar nature of B-N bonds and the high quadrupole moment of CO2 over N2.

关键词： boron nitride boron nitride nanotube aerogel quadrupole moment selective CO2 adsorption

Organic–inorganic nanohybrids for fluorescence, photoacoustic and Raman bioimaging

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Science Bulletin 2015年第7期60卷 665-678,M0003页

作者： Sivaramapanicker sreejith Tran Thi Mai Huong Parijat Borah Yanli Zhao Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University School of Materials Science and Engineering Nanyang Technological University

Organic-inorganic nanohybrid materials repre- sent a wide range of nanoscaled synthetic materials con- sisting of both organic and inorganic components that are linked together by covalent or non-covalent interactions, which have been widely employed in various fields such as optoelectronics, catalysis and biomedicine. As a result of this special combination, nanohybrid materials assemble numerous extraordinary features that provide great opportunities to improve their stability, multifunctions, biocom- patibility, eco-friendliness and other physical and mechanical properties. This review highlights recent re- search developments of functional organic-inorganic nanohybrid materials and their specific applications in bioimaging including fluorescent, Raman, photoacoustic and combined bioimaging. Future research directions and perspectives in this rapidly developing field are also discussed.

关键词： Bioimaging Combined imagingFunctional nanomaterials Organic-inorganichybrid Photoacoustic imaging

The antioxidant status in human population based on the concept of prakruthi in Ayurveda

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Asian Pacific Journal of Tropical Medicine 2008年第4期1卷 40-43页

作者： Madhukar Mallya H Revathi P Shenoy sreejith Ramakrishnan Linta Thampi Rashmi Stevens M Sethukumar kamath Anupama Nayak Anjali Rao Department of Biochemistry Kasturba Medical College and HospitalManipal-576104KarnatakaIndia Department of Ayurveda Kasturba Medical College and HospitalManipal-576104KarnatakaIndia Department of Biochemistry kasturba Medical College and Hospital Manipal-576104KarnatakaIndia

Objective:In the Ayurvedic system of medicine,body constitution(prakruthi) is said to play a vital role in the disease process as well as in its *** radical toxicity is also involved in the etiopathogenesis of many ***,in the present study an attempt has been made to correlate the body constitution type and the antioxidant status of that ***:Healthy volunteers from Manipal University Campus, South karnataka,India were classified into three main human constitutions(prakruthi) and their possible combinations and their serum total antioxidant activity was ***:There was a significant negative correlation of the total antioxidant status with the pitta prakruthi whereas vata and kapha constitutions showed no significant correlation with the total antioxidant ***:Ayurveda classifies each individual based on his/her prakruthi into three categories of Doshas:Vata,Pitta and kapha(collectively known as Tridoshas ). The three Doshas are fundamental regulatory principles responsible for maintaining organism functioning and manifesting those characteristics typifying each individual,that is,in equilibrium Tridoshas signify health and an imbalance leads to ***,in this study a significantly decreased antioxidant status in the Pitta group would render them more susceptible to damage by oxidative ***,we suggest that supplementation with antioxidants of herbal(Ayurvedic) origin to such a group would prove to be beneficial - opening up the arena for pharmacogenomics and customized antioxidant drug administration based on the prakruthi of an individual.

关键词： Ayurveda Antioxidant status Prakruthi Vata Pitta kapha

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碱矿渣混凝土氯离子扩散试验研究

混凝土 2019年第9期 74-78页

作者：马倩敏杨进波 sreejith VNanukuttan 黄丽萍昆明理工大学建筑工程学院土木工程系云南省土木工程防灾重点实验室云南昆明650500 山东农业大学水利土木工程学院土木工程系山东泰安271018 贝尔法斯特女王大学建筑规划与土木工程学院英国贝尔法斯特BT71NN

采用氯离子非稳态自然扩散试验测试了碱矿渣混凝土的氯离子扩散系数,并与对比水泥混凝土进行比较。研究了水玻璃碱当量与模数对碱矿渣混凝土氯离子扩散系数的影响。结果表明:由于孔结构更好,碱矿渣混凝土氯离子扩散系数较对比水泥混凝土... 详细信息

采用氯离子非稳态自然扩散试验测试了碱矿渣混凝土的氯离子扩散系数,并与对比水泥混凝土进行比较。研究了水玻璃碱当量与模数对碱矿渣混凝土氯离子扩散系数的影响。结果表明:由于孔结构更好,碱矿渣混凝土氯离子扩散系数较对比水泥混凝土低,具有较好的抗氯离子侵入能力。水玻璃碱当量增加,碱矿渣混凝土氯离子扩散系数有所降低。碱当量一定时,氯离子扩散系数随模数增加,先呈现减小趋势,在模数为1.5左右达到最低值,随后氯离子扩散系数有增加趋势。不同于普通水泥混凝土,当碱当量与模数变化时,混凝土电导率不适合用于评价碱矿渣混凝土的孔结构。

关键词：碱矿渣混凝土 Cl-扩散系数碱当量模数电导率