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A Hybrid Brain-Computer Interface for Closed-Loop Position Control of a Robot Arm

IEEE/CAA Journal of Automatica Sinica 2020年第5期7卷 1344-1360页

作者： Arnab Rakshit amit Konar Atulya K.Nagar Artificial Intelligence Lab. Department of Electronics&Tele-Communication EngineeringJadavpur UniversityKolkata 700032India Department of Mathematics Computer Scienceand EngineeringLiverpool Hope UniversityLiverpool L169JDUnited Kingdom IEEE

Brain-Computer interfacing(BCI)has currently added a new dimension in assistive *** braincomputer interfaces designed for position control applications suffer from two fundamental ***,most of the existing schemes employ open-loop control,and thus are unable to track positional errors,resulting in failures in taking necessary online corrective *** are examples of a few works dealing with closed-loop electroencephalography(EEG)-based position *** existing closed-loop brain-induced position control schemes employ a fixed order link selection rule,which often creates a bottleneck preventing time-efficient ***,the existing brain-induced position controllers are designed to generate a position response like a traditional firstorder system,resulting in a large steady-state *** paper overcomes the above two limitations by keeping provisions for steady-state visual evoked potential(SSVEP)induced linkselection in an arbitrary order as required for efficient control and generating a second-order response of the position-control system with gradually diminishing overshoots/undershoots to reduce steady-state *** than the above,the third innovation is to utilize motor imagery and P300 signals to design the hybrid brain-computer interfacing system for the said application with gradually diminishing error-margin using speed reversal at the zero-crossings of positional *** undertaken reveal that the steady-state error is reduced to 0.2%.The paper also provides a thorough analysis of the stability of the closed-loop system performance using the Root Locus technique.

关键词： Brain-computer interfacing(BCI) electroencepha-lography(EEG) Jaco robot arm motor imagery P300 steady-state visually evoked potential(SSVEP)

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Two-Dimensional Lattice Boltzmann Model for Droplet Impingement and Breakup in Low Density Ratio Liquids

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Communications in Computational Physics 2011年第8期10卷 767-784页

作者： amit Gupta Ranganathan Kumar Department of Mechanical Engineering Indian Institute of TechnologyNew DelhiIndia 110016 Department of Mechanical Materials and Aerospace EngineeringUniversity of Central FloridaOrlandoFL 32816USA

A two-dimensional lattice Boltzmann model has been employed to simulate the impingement of a liquid drop on a dry *** a range of Weber number,Reynolds number and low density ratios,multiple phases leading to breakup have been *** analytical solution for breakup as function of Reynolds and Weber number based on the conservation of energy is shown to match well with the *** the moment breakup occurs,the spread diameter is maximum;it increases with Weber number and reaches an asymptotic value at a density ratio of *** breakup is found to be more viable for the case when the wall is non-wetting or neutral as compared to a wetting *** breakup,the distance between the daughter droplets is much higher for the case with a non-wetting wall,which illustrates the role of the surface interactions in the outcome of the impact.

关键词： Lattice Boltzmann droplet impingement spread factor breakup

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Synergistic antioxidant interactions between green tea and Ocimum gratissimum

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Asian Pacific Journal of Tropical Biomedicine 2019年第8期9卷 333-338页

作者： Sumaya Farooq amit Sehgal Department of Zoology School of Bioengineering and Biosciences Lovely Professional University

Objective: To evaluate the antioxidant interactions between aqueous infusions of green tea and Ocimum gratissimum at different ratios. Methods: Antioxidant activities of aqueous infusion of green tea and Ocimum gratissimum (leaves) alone or in combination at various proportions (3:1, 2:1, 1:1, 1:2, 1:3) were determined by DPPH, ABTS, NO and ex-vivo assays including lipid peroxidation and haemolysis. Total phenolic content and flavonoid content was calculated by Folin-Ciocalteu reagent and aluminum chloride colorimetry method, respectively. A correlation study was also conducted between the antioxidant activity and total phenolic/flavonoid content of various infusions. The interactions were analyzed by combination index applying CompuSyn software. Results: Green tea exhibited high radical scavenging ability as compared to Ocimum gratissimum infusion. Combination of green tea and Ocimum gratissimum exhibited moderate antagonism to strong synergistic interaction at various ratios. A strong correlation was found between total phenolic content/total flavonoid content and antioxidant activities of individual infusions (green tea and Ocimum gratissimum). For binary mixture at different ratios, a weak to strong correlation was observed between total phenolic content and antioxidant activity and almost no correlation between total flavonoid content and antioxidant potential. Conclusions: Overall, green tea and Ocimum gratissimum combination (1:1) displayed the highest antioxidant potential and maximum synergism.

关键词： Antioxidant Combination index Green tea Ocimum gratissimum Total phenolic content Total flavonoid content

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Concurrent tubercular and staphylococcus meningitis in a child

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Asian Pacific Journal of Tropical Medicine 2009年第4期2卷 75-76页

作者： amit Agrawal Clinical and Administrative HeadDivision of NeurosurgeryDatta Meghe Institute of Medical SciencesSawangi(Meghe)Wardha 442004 MaharashtraIndia

Spontaneous,non-surgical haematogenous Staphylococcus aureus meningitis is rare and associated with high *** infection causing meningitis(pyogenic and tubercular) is further rarer,poses a difficult diagnostic and management challenge,which warrants early diagnosis and aggressive *** present a case of concurrent pyogenic and tubercular meningitis in a child managed *** seems that in present case initial pyogenic infection resulted in the immunocompromised state for the child that would had lead to the activation of tubercular foci resulting in tubercular meningitis.

关键词： Tubercular meningitis Bacterial meningitis Staphylococcus meningitis Staphylococcus Tuberculosis

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Gingival enlargements: Differential diagnosis and review of literature

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World Journal of Clinical Cases 2015年第9期3卷 779-788页

作者： amit Arvind Agrawal Department of Periodontics MGV’s KBH Dental college and hospital

Gingival enlargement is one of the frequent features of gingival diseases. However due to their varied presentations, the diagnosis of these entities becomes challenging for the clinician. They can be categorized based on their etiopathogenesis, location, size, extent, etc. Based on the existing knowledge and clinical experience, a differential diagnosis can be formulated. Subsequently, after detailed investigation, clinician makes a final diagnosis or diagnosis of exclusion. A perfect diagnosis is critically important, since the management of these lesions and prevention of their recurrence is completely dependent on it. Furthermore, in some cases where gingival enlargement could be the primary sign of potentially lethal systemic diseases, a correct diagnosis of these enlargements could prove life saving for the patient or at least initiate early treatment and improve the quality of life. The purpose of this review article is to highlight significant findings of different types of gingival enlargement which would help clinician to differentiate between them. A detailed decision tree is also designed for the practitioners, which will help them arrive at a diagnosis in a systematic manner. There still could be some lesions which may present in an unusual manner and make the diagnosis challenging. By knowing the existence of common and rare presentations of gingival enlargement, one can keep a broad view when formulating a differential diagnosis of localized(isolated, discrete, regional) or generalized gingival enlargement.

关键词： Differential diagnosis Gingival hyperplasia Gingival overgrowth Gingival diseases Decision tree

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Laser-induced self-organization in Se–Te–Sn–Cd glassy semiconductor for developing novel light-sensing dielectrics

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Progress in Natural Science:Materials International 2019年第5期29卷 541-548页

作者： amit Kumar Arvind Sharma Neeraj Mehta Glass Science Laboratory Department of Physics Institute of Science Banaras Hindu University Physics Department School of Physical and Materials Sciences Mahatma Gandhi Central University

The laser-induced effects on dielectric properties of chalcogenide glass(Ch Gs) have been present in a glassy system of Se–Te–Sn–Cd for possible applications in optics and optoelectronics such as light-controlled capacitance-based touch displays. The temperature/frequency dependence of dielectric relaxation before and after laser exposure was investigated by using laser sources of different wavelengths(405 nm, 532 nm, 690 nm, and 785 nm). The result showed the presence of laser-induced residual effects on dielectric properties(dielectric constant/loss and a.c. conductivity) after the exposure of continuous-wave laser sources of chosen *** analysis indicates that the modification in the meta-stable state due to self-organization is the feasible mechanism of observed persistent light-sensing effects.

关键词： Amorphous materials Laser Inorganic glass Chalcogenides Self-organization

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Exploring the efficacy of natural products in alleviating Alzheimer’s disease

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Neural Regeneration Research 2019年第8期14卷 1321-1329页

作者： Prajakta Deshpande Neha Gogia amit Singh Department of Biology University of Dayton Dayton OH USA Premedical Program University of Dayton Dayton OH USA Center for Tissue Regeneration and Engineering at Dayton (TREND) University of Dayton Dayton OH USA The Integrative Science and Engineering Center University of Dayton Dayton OH USA Center for Genomic Advocacy (TCGA) Indiana State University Terre Haute IN USA

Alzheimer’s disease(hereafter AD) is a progressive neurodegenerative disorder that affects the central nervous system. There are multiple factors that cause AD, viz., accumulation of extracellular Amyloid-beta 42 plaques, intracellular hyper-phosphorylated Tau tangles, generation of reactive oxygen species due to mitochondrial dysfunction and genetic mutations. The plaques and tau tangles trigger aberrant signaling, which eventually cause cell death of the neurons. As a result, there is shrinkage of brain, cognitive defects, behavioral and psychological problems. To date, there is no direct cure for AD. Thus, scientists have been testing various strategies like screening for the small inhibitor molecule library or natural products that may block or prevent onset of AD. Historically, natural products have been used in many cultures for the treatment of various diseases. The research on natural products have gained importance as the active compounds extracted from them have medicinal values with reduced side effects, and they are bioavailable. The natural products may target the proteins or members of signaling pathways that get altered in specific diseases. Many natural products are being tested in various animal model systems for their role as a potential therapeutic target for AD, and to address questions about how these natural products can rescue AD or other neurodegenerative disorders. Some of these products are in clinical trials and results are promising because of their neuroprotective, anti-inflammatory, antioxidant, anti-amyloidogenic, anticholinesterase activities and easy availability. This review summarizes the use of animal model systems to identify natural products, which may serve as potential therapeutic targets for AD.

关键词： Alzheimer’s disease amyloid-beta 42 natural products Lunasin neuroprotective anti-inflammation antioxidant Drosophila cell death neurodegeneration

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Analysis of Radio over Fiber system for mitigating four-wave mixing effect

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Digital Communications and Networks 2020年第1期6卷 115-122页

作者： Namita Kathpal amit Kumar Garg Department of Electronics&Communication Engineering Deenbandhu Chhotu Ram University of Science and TechnologyMurthalSonepatHaryanaIndia

In this paper,an efficient 8-channel 32Gbps RoF(Radio over Fiber)system incorporating Bessel Filter(8/32 RoFBF)has been demonstrated to reduce the impact of non-linear transmission effects,specifically Four-Wave Mixing(FWM).The simulation results indicate that the proposed 8/32 RoF-BF system provides an optimum result *** spacing(75 GHz),input source power(0 dBm)and number of input channels(8).In comparison with the existing RoF system,the proposed 8/32 RoF-BF system has been validated analytically and it is found that the performance of the proposed system is in close proximity particularly in FWM sideband power reduction of the order of 4 dBm for the 8-channel 32Gbps RoF system.

关键词： Dispersion compensating fiber Four-wave mixing Radio over Fiber Single mode fiber Wavelength division multiplexer

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Facies analysis and paleoenvironmental interpretation of Piacenzian carbonate deposits from the Guitar Formation of Car Nicobar Island,India

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Geoscience Frontiers 2013年第6期4卷 755-764页

作者： amit K.Ghosh Suman Sarkar Birbal Sahni Institute of Palaeobotany 53 University RoadLucknow 226 007India

Facies characterization of Piacenzian （late Pliocene） carbonate sediments of the Guitar Formation in Car Nicobar Island,India and the subsequent integration of paleoecological data have been applied to interpret the paleoenvironment of the coralline algal-reef ***-section analysis reveals that Amphiroa,Corallina and Jania are the dominant geniculate corallines,while Lithothamnion,Mesophyllum,Phymatolithon,Lithophyllum,Spongites and Lithoporella are the major non-geniculate corallines contributing to the sedimentary *** small and larger benthic foraminifera also dominate the biogenic ***,barnacle shells,echinoid spines,fragments of bryozoans,mollusks and ostracodes are the subordinate *** dominate the studied facies while packstones and boundstones （with wackestone elements） are the sub lithofacies showing a fair *** carbonate facies presenting a complete reef complex have been distinguished that were deposited in shallow intertidal,back-reef shelf/lagoon,reef and deeper fore-reef shelf *** of coralline algal and benthic foraminiferal assemblages,taphonomic signatures of abrasion and fragmentation,grain size,angularity and encrustation indicate a shallow to relatively deeper bathymetric horizon of approximately 10-60 m that corresponds to a regime of high to moderate hydrodynamic conditions.

关键词： Facies analysis Coralline algae Benthic foraminifera Piacenzian Guitar Formation Car Nicobar

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Systematic dependence of SFE＊B(E2)↑ and ROTE＊B(E2)↑on N_pN_n in the framework of shape fluctuation model

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Chinese Physics C 2017年第5期41卷 116-121页

作者： amit Bindra H.M.Mittal Department of Physics Dr.B.R.Ambedkar National Institute of Technology

A systematic dependence of shape fluctuation energy product SFE ＊ B（E2）↑ and rotational energy product ROTE ＊ B（E2）↑ on the valence nucleon product Np Nn is carried out in the Z = 50-82,N = 82-126 major shell *** the shape transitional nuclei,the product SFE＊B（E2）↑ drops to zero and becomes negative,indicating direct dependence on N_pN_n.A relative rise,on the other hand,is observed in the product ROTE＊B（E2） ↑plotted against N_pN_n for all the nuclei in Z = 50-82 and N = *** the N 〉 104 region,large positive values of the product SFE ＊ B（E2） ↑ are observed for the Pt nucleus,which indicates sphericity.A systematic study of the product SFE ＊ B（E2）↑ and ROTE ＊ B（E2） ↑ with atomic number Z is also *** products SFE ＊ B（E2） ↑and ROTE ＊ B（E2） ↑ vary sharply with Z for the N = 88 *** discuss here for the first time the correlation between SFE ＊ B（E2） ↑ and ROTE ＊ B（E2） ↑ with valence nucleon product N_pN_n.

关键词： fluctuation nuclei E2 and ROTE*B nucleus rotational valence deformed transitional sharply

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