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Vardhini P.,Punitha N.,Ramakrishnan S. 대한전자공학회 2020 IEIE Transactions on Smart Processing & Computing Vol.9 No.2
In this study, an attempt has been made to analyze uterine Electromyography (uEMG) signals during Term conditions (pregnancy duration more than 37 weeks of gestational age) using Empirical Mode Decomposition based Detrended Fluctuation Analysis (EMD-DFA). The Term delivery signals are considered from a publicly available database, grouped as T1 (<26 weeks gestational age) and T2 (≥26 weeks gestational age) based on the time of recording, and are subjected to an EMD-DFA algorithm. The double logarithmic plot of the detrended fluctuation function against the scale is analyzed, and the Hurst exponent feature is computed for both groups. The features are statistically analyzed using the Student’s t-test. Results show that the EMD-DFA method is able to capture the variations in the fluctuations of uEMG signals under these conditions. The Hurst exponent feature is found to be statistically significant (p-value < 0.005) for both groups. There is an increase in the Hurst exponent feature value in the T2 group, which indicates that T2 signals possess smoother characteristics than T1 signals. Hence, it appears that the proposed approach could aid in investigating variations in the fluctuations of Term delivery signals, differentiating T1 and T2 conditions.
Extraction of Multiple Cellular Objects in HEp-2 Images using LS Segmentation
P. Suhail Parvaze,S. Ramakrishnan 대한전자공학회 2017 IEIE Transactions on Smart Processing & Computing Vol.6 No.6
In this work, an attempt has been made to extract multiple objects from Human Epithelial Type 2 (HEp-2) cell images using LS based segmentation. Thirteen Positive and intermediate intensity level images that consist of Homogenous, Centromere and Nucleolar patterns are considered in this study. The results show that LS based segmentation is able to extract objects of interest from the images. The extraction efficiency is found to be better for LS segmented images. Among the considered cell shapes, Centromere pattern is found to be sensitive for the extraction method. The overall cell extraction accuracy is found to be 90% in both positive and intermediate intensity images. It appears that this approach with LS for segmenting objects and differentiating positive and intermediate images is found to be useful for automated analysis of autoimmune diseases.
Ameliorating Effect of Capsaicin on Alterations in Lipid Metabolism during Mice Lung Carcinoma
P. Anandakumar,S. Jagan,S. Kamaraj,G. Ramakrishnan,J. Binu Clara,D. Pathitha,T. Kavitha,T. Devaki 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.2
Spices and vegetables possess antioxidant activity that can be applied for preservation of lipids and lower lipid peroxidation in biological systems. In the present study, we have investigated the effect of capsaicin on lipid metabolism during benzo(a)pyrene induced lung cancer in Swiss albino mice. Benzo(a)pyrene (50 mg/kg wt) induced lung cancer animals showed abnormal changes in the tissue and serum lipids, lipoproteins and lipid metabolizing enzymes. Treatment with capsaicin (10 mg/kg body wt) remarkably attenuated all the above alterations and restored normalcy. These findings reveal the chemomodulatory potential of capsaicin in attenuating the alterations in lipid metabolism during experimental lung carcinogenesis.
SHOULD PRUNING BE A PRE-PROCESSOR OF ANY LINEAR SYSTEM?
Syamal K. Sen,Suja Ramakrishnan,Ravi P. Agarwal,Gholam Ali Shaykhian 한국전산응용수학회 2011 Journal of applied mathematics & informatics Vol.29 No.5
So far as a solution of the given consistent linear system is concerned many numerical methods - both mathematically non-iterative as well as iterative - have been reported in the literature over the last couple of centuries. Most of these methods consider all the equations including linearly dependent ones in the system and obtain a solution whenever it exists. Since linearly dependent equations do not add any new information to a system concerning a solution we have proposed an algorithm that identifles them and prunes them in the process of solving the system. The pruning process does not involve row/column interchanges as in the case of Gauss reduction with partial/complete pivoting. We demonstrate here that the use of pruning as an inbuilt part of our solution process reduces computational and storage complexities and also computational error.
SHOULD PRUNING BE A PRE-PROCESSOR OF ANY LINEAR SYSTEM?
Sen, Syamal K.,Ramakrishnan, Suja,Agarwal, Ravi P.,Shaykhian, Gholam Ali The Korean Society for Computational and Applied M 2011 Journal of applied mathematics & informatics Vol.29 No.5
So far as a solution of the given consistent linear system is concerned many numerical methods - both mathematically non-iterative as well as iterative - have been reported in the literature over the last couple of centuries. Most of these methods consider all the equations including linearly dependent ones in the system and obtain a solution whenever it exists. Since linearly dependent equations do not add any new information to a system concerning a solution we have proposed an algorithm that identifies them and prunes them in the process of solving the system. The pruning process does not involve row/column interchanges as in the case of Gauss reduction with partial/complete pivoting. We demonstrate here that the use of pruning as an inbuilt part of our solution process reduces computational and storage complexities and also computational error.
( Chelliah R. ),( S. R. Ramakrishnan ),( U. Antony ),( S. H. Kim ),( I. Khan ),( C. N. Tango ),( P. N. Kounkeu ),( S. Wei ),( M. S. Hussain ),( E. B. M. Daliri ),( R. Momna ),( M. Y. Kwon ),( E. H. Le 강원대학교 농업생명과학연구원(구 농업과학연구소) 2018 강원 농업생명환경연구 Vol.30 No.1
Plant proteins are important functional ingredients in many processed food products. In particular, globular proteins from various sources play an important role in many food products. In the current study, 11S globulin protein from white sesame seeds, amandin protein from almond seeds, and cucurbitin protein from pumpkin seeds were extracted by means of ammonium sulfate precipitation and purified by anion-exchange chromatography on a DEAE-Sephadex column (20 × 30 cm). Amandin protein of almond and cucurbitin protein of pumpkin seeds both belong to the 11S globulin family. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis of protein samples treated with reducing agents revealed that the isolated 11S globulin from white sesame seeds was composed of an acidic (30-33 kDa) and basic (20-24 kDa) polypeptide, amandin from almond seeds was composed of an acidic (40-42 kDa) and basic (15-20 kDa) polypeptide, and cucurbitin from pumpkin seeds was composed of an acidic (35-42 kDa) and basic (20-25 kDa) polypeptide. The alpha amylase-inhibiting activities of the three proteins was determined. Cucurbitin of pumpkin seeds had a greater alpha amylase inhibitory effect (-86%) than 11S globulin of sesame (82.6%) and amandin protein of almond seeds (76%). The antihypertensive effect of the three proteins was evaluated by a chrioallantoin membrane assay in chick embryos, which revealed that cucurbitin protein showed higher vasodilatation activity than the other two proteins.
Sintering Behavior of Mechanically Alloyed Titanium - Titanium Nitride Nanocomposite Powders
Dabhade Vikram V.,Panigrahi B.B.,Godkhindi M.M.,Rama Mohan T. R.,Ramakrishnan P. 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
The sintering behavior of titanium-titanium nitride nanocomposite powders has been studied by dilatometry. Titanium. titanium nitride nanocomposite powders were produced by the reactive milling of micron sized titanium powder in nitrogen atmosphere. The Ti-TiN nanocomposite powders milled for various durations along with the initial micron sized Ti powders were then sintered in the temperature range of by a constant rate of heating . The linear shrinkage, shrinkage rate, activation energy for sintering and microstructure has been studied and discussed as a function of milling time.