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V. Manjunath,V. Rajagopal Reddy,P.R. Sekhar Reddy,V. Janardhanam,최철종 한국물리학회 2017 Current Applied Physics Vol.17 No.7
High-k rare-earth samarium oxide (Sm2O3) films are formed on n-GaN surface and analyzed its compositional properties by XPS measurements. XPS results specify that the Sm2O3 films are formed at the interface. Then, the Au/Sm2O3/n-GaN MIS junction is prepared with a Sm2O3 as insulating layer and correlated its electrical properties with the Au/n-GaN MS junction. The MIS junction shows highest barrier height ((0.81 eV (I-V)/1.0 eV (C-V)) for MIS junction than the MS junction (0.68 eV (I-V)/0.90 eV (C-V)). Excellent rectifying property is observed with lowest reverse leakage current and higher barrier height for the MIS junction than the MS junction, implying that the Sm2O3 insulating layer effectively modified the barrier height. The barrier heights determined from I-V, Cheung's, Norde and JS eV plot closely matched with each other, suggesting that these techniques are reliable and valid. The estimated interface state density of the MIS junction (1.990 1011 cm2eV1 (EC-0.82 eV)) is lower than the MS junction (9.204 1012 cm2eV1 (EC-0.70 eV)), which demonstrates that the Sm2O3 insulating layer performs an important role in lowering the interface state density. The frequency-dependent characteristics of the MS and MIS junctions are discussed in the frequency range of 10 kHz to 1 MHz and found that the determined capacitance values decrease with increasing frequency. The forward I-V characteristic of the MS and MIS junctions reveals the ohmic behavior at low voltage regions and space-chargelimited conduction at higher voltage regions. Results reveal that the reverse leakage current in the studied MS and MIS junctions is controlled by a Poole-Frenkel emission.
Investigation on splice graphs by exploting certain topological indices
V. Lokesha,M. MANJUNATH,K. Z. Yasmeen 장전수학회 2020 Proceedings of the Jangjeon mathematical society Vol.23 No.2
Let G1 and G2 be simple connected graphs with disjoint vertex sets V (G1) and V (G2) respectively. For given vertices a1 2 V (G1) and a2 2 V (G2) a splice of G1 and G2 by vertices a1 and a2 defined by identifying the vertices a1 and a2 in the union of G1 and G2. In this article the explicit interpretation of ISI;EM1;ABC and SK1 index in terms of the graph size and maximum or minimum vertex degrees of special splice graphs are obtained.
S-Corona operations of standard graphs in terms of degree sequences
M. MANJUNATH,V. Lokesha 장전수학회 2020 Proceedings of the Jangjeon mathematical society Vol.23 No.2
Let G and H be two graphs with vertices n1 and n2 and edges e1 and e2 respectively. The corona of graphs G and H with disjoint vertex sets V (G) and V (H) and edge sets E(G) and E(H) is obtained by taking one copy of G and jV (G)j copies of H, by joining the ith vertex of V (G) to each vertex in the ith copy of H. The degree sequence (DS) of a graph is the set of vertex degrees. In this article, we determine the (DS) of S- vertex (edge) corona and S- edge neighbourhood corona operation of standard graphs.
COMPUTATION OF ADRIATIC INDICES OF CERTAIN OPERATORS OF REGULAR AND COMPLETE BIPARTITE GRAPHS
V. Lokesha,M. MANJUNATH,B. Chaluvaraju,K. M. Devendraiah,I. N. Cangul,A. S. CEVIK 장전수학회 2018 Advanced Studies in Contemporary Mathematics Vol.28 No.2
A topological index of a graph G is a numerical parameter related to G which characterizes its molecular topology and used for quantitative structure-activity relationship (QSAR) and quantitative structure-property relationship (QSPR). Adriatic indices are bond-additive topological indices. They are analyzed on the testing sets provided by the Inernational Academy of Mathematical Chemistry (IAMC) and it has been shown that they have good predictive properties in many cases. In this paper, we study the certain adriatic indices of regular and complete bipartite graphs using some graph operators.
Histological and Physico-Chemical Evaluation ofHybanthus enneaspermus (L.) F. Muell
V. B. Narayanaswamy,C. Dinesh Kumar,M. Manjunath Setty,Annie Shirwaikar 한국생약학회 2006 Natural Product Sciences Vol.12 No.2
paper presents a detailed pharmacognostical study of the plant drug Hybanthus enneaspermusstudied using procedures of light, confocal microscopy, WHO recomended physico-chemical determinationsand authentic phytochemical procedures. The physico-chemical, morphological, and histological parameterspresented in this paper may be proposed as parameters to establish the authenticity of H. enneaspermus and maypossibly help to diferentiate the drug from its adulterants.KeywordsHybanthus enneaspermus, Violaceae, pharmacognosy, stem and leaf
Localization of lung abnormalities on chest X-rays using self-supervised equivariant attention
Gavin D’Souza,N. V. Subba Reddy,K. N. Manjunath 대한의용생체공학회 2023 Biomedical Engineering Letters (BMEL) Vol.13 No.1
Chest X-Ray (CXR) images provide most anatomical details and the abnormalities on a 2D plane. Therefore, a 2D view of the 3D anatomy is sometimes sufficient for the initial diagnosis. However, close to fourteen commonly occurring diseases are sometimes difficult to identify by visually inspecting the images. Therefore, there is a drift toward developing computer-aided assistive systems to help radiologists. This paper proposes a deep learning model for the classification and localization of chest diseases by using image-level annotations. The model consists of a modified Resnet50 backbone for extracting feature corpus from the images, a classifier, and a pixel correlation module (PCM). During PCM training, the network is a weight-shared siamese architecture where the first branch applies the affine transform to the image before feeding to the network, while the second applies the same transform to the network output. The method was evaluated on CXR from the clinical center in the ratio of 70:20 for training and testing. The model was developed and tested using the cloud computing platform Google Colaboratory (NVidia Tesla P100 GPU, 16 GB of RAM). A radiologist subjectively validated the results. Our model trained with the configurations mentioned in this paper outperformed benchmark results.