Series D : Individual Strategies for Problem Solving

( Revathy Parameswaran ) 한국수학교육학회 2005 수학교육연구 Vol.9 No.1

Magneto-exciton in a GaN/Ga_1−<i>x</i>Al_<i>x</i>N quantum dot

Revathi, M.,Yoo, ChangKyoo,John Peter, A. Elsevier 2010 Physica E, Low-dimensional systems & nanostructure Vol.43 No.1

<P><B>Abstract</B></P><P>Magneto-exciton bound donor is investigated theoretically in a GaN/Ga<SUB>1−<I>x</I></SUB>Al<SUB><I>x</I></SUB>N quantum dot within the framework of single band effective mass approximation and compared with the experimental results. Binding energies on excitons bound hydrogenic donors and the diamagnetic susceptibility are obtained as a function of dot radius and magnetic field. The valence-band anisotropy is included in our theoretical model using different hole masses in different spatial directions. Zeeman effect is calculated through the energy dependent effective mass. The dependence of donor bound exciton diamagnetic shift is found. The interband optical transition of GaN/Ga<SUB>1−<I>x</I></SUB>Al<SUB><I>x</I></SUB>N dot is computed with various structural parameters in the influence of magnetic field. Our results show that (i) quantum size, the magnetic field and the interband optical transitions have a considerable influence on neutral donor exciton states, (ii) the diamagnetic susceptibility increases with the magnetic field and is not pronounced for smaller dot radii and (iii) the found diamagnetic shift is agreed with the other experimental investigator [Yoichi Yamada et al., 2000 [26]].</P>

$$\mathcal {H}_{\infty }$$ H ∞ filtering for sample data systems with stochastic sampling and Markovian jumping parameters

Revathi, V. M.,Balasubramaniam, P.,Park, Ju H.,Lee, Tae H. Springer-Verlag 2014 Nonlinear dynamics Vol.78 No.2

Foliar Micromorphological Response of In Vitro Regenerated and Field Transferred Plants of Oldenlandia umbellata L.: A Medicinal Forest Plant

Revathi Jayabal,Latha Rasangam,Manokari Mani,Mahipal Singh Shekhawat 강원대학교 산림과학연구소 2019 Journal of Forest Science Vol.35 No.1

Plant tissue culture techniques offer quick methods of regeneration of plants of medicinal importance but the survival chances of such plants are always questionable when shifted to the in vivo conditions. The present study enumerates the micromorphological developments in the leaves of in vitro regenerated and field transferred plantlets of Oldenlandia umbellata. The leaves developed in vitro after 4th subcultures of multiplication phase and after 6 weeks of field transferred plants were used. Statistically significant differences in the number of stomata, veins, raphides, crystals and trichome density per square mm were observed. The improvements in stomatal apparatus and density (decreased from 41.85 to 32.20), developments in leaf architectural parameters and emergence of defense mechanism through increased numbers of raphides (8 to 15), crystals and trichomes (13.5 to 18.2) proved acclimation of tissue culture raised plantlets from in vitro to the in vivo environments lead to 100 % success in field establishment of the plantlets. The in vitro induced foliar abnormalities (changes in stomata, venation pattern, vein density, trichomes, crystals etc.) were repaired while hardening of plantlets in the greenhouse and finally in the field. The observed micromorphological response of leaves under altered environmental conditions could help in determination of proper stage of field transfer and prediction of survival percentage of in vitro regenerated O. umbellata plantlets.

Cytosolic thioredoxin from Ruditapes philippinarum: Molecular cloning, characterization, expression and DNA protection activity of the recombinant protein

Revathy, K.S.,Umasuthan, N.,Lee, Y.,Whang, I.,Kim, H.C.,Lee, J. Pergamon Press ; Elsevier Science Ltd ; Pergamon 2012 DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY Vol.36 No.1

Thioredoxin (TRx) is a small redox protein that plays significant roles in protection against oxidative stress and in cell homeostasis by maintaining oxidized proteins in a reduced state. Here, we describe the isolation and characterization of a full-length TRx cDNA sequence from manila clam, Ruditapes philippinarum and named it as RpTRx. The full length sequence consists of 1416bp with an open reading frame of 318bp encoding for 106 amino acids. RpTRx protein harbors evolutionarily-conserved TRx active site <SUP>32</SUP>WCGPC<SUP>36</SUP>. Phylogenetic analysis revealed a close proximity of RpTRx with the orthologue in Japanese scallop, Chlamys farreri. RpTRx was found to be constitutively expressed in hemocyte, gill, mantle, foot and siphon indicating a general role in physiological processes in various tissues. With regard to a potential role in immune responses, the RpTRx mRNA was found to be up-regulated in hemocytes after bacterial (Vibrio tapetis) and lipopolysaccharide (LPS) challenge at 3h post-infection (p.i.); a wavering increase was observed up to 96h p.i. for LPS challenge and 48h p.i. for bacterial challenge. Thus, RpTRx may function as an intracellular antioxidant to protect the cells against ROS induced by LPS and bacterial challenges. Indeed, when recombinant RpTRx protein (rRpTRx) was over-expressed in Escherichiacoli Rosetta gami<SUP>TM</SUP> (DE3) cells, it was able to scavenge free radicals and protect super-coiled DNA from oxidative damage induced by a metal-ion catalyzed oxidation reaction. In summary, RpTRx plays an essential role in cellular defense and maintenance of homeostasis in the manila clam.

Hybrid Fuzzy Adaptive Wiener Filtering with Optimization for Intrusion Detection

Revathi Sujendran,Malathi Arunachalam 한국전자통신연구원 2015 ETRI Journal Vol.37 No.3

Intrusion detection plays a key role in detecting attacks over networks, and due to the increasing usage of Internet services, several security threats arise. Though an intrusion detection system (IDS) detects attacks efficiently, it also generates a large number of false alerts, which makes it difficult for a system administrator to identify attacks. This paper proposes automatic fuzzy rule generation combined with a Wiener filter to identify attacks. Further, to optimize the results, simplified swarm optimization is used. After training a large dataset, various fuzzy rules are generated automatically for testing, and a Wiener filter is used to filter out attacks that act as noisy data, which improves the accuracy of the detection. By combining automatic fuzzy rule generation with a Wiener filter, an IDS can handle intrusion detection more efficiently. Experimental results, which are based on collected live network data, are discussed and show that the proposed method provides a competitively high detection rate and a reduced false alarm rate in comparison with other existing machine learning techniques.

Quality of Service using Min-Max Data Size Scheduling in Wireless Sensor Networks

Revathi, A.,Santhi, S.G. International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.9

Wireless Sensor Networks (WSNs) plays an important role in our everyday life. WSN is distributed in all the places. Nowadays WSN devices are developing our world as smart and easy to access and user-friendly. The sensor is connected to all the resources based on the uses of devices and the environment [1]. In WSN, Quality of Service is based on time synchronization and scheduling. Scheduling is important in WSN. The schedule is based on time synchronization. Min-Max data size scheduling is used in this proposed work. It is used to reduce the Delay & Energy. In this proposed work, Two-hop neighboring node is used to reduce energy consumption. Data Scheduling is used to identify the shortest path and transmit the data based on weightage. The data size is identified by three size of measurement Min, Max and Medium. The data transmission is based on time, energy, delivery, etc., the data are sent through the first level shortest path, then the data size medium, the second level shortest path is used to send the data, then the data size is small, it should be sent through the third level shortest path.

Association between burnout and wellness culture among emergency medicine providers

Revathi Jyothindran,James P d’Etienne,Kevin Marcum,Amy F Ho,Richard D. Robinson,Aubre Tijerina,Clare Graca,Heidi C Knowles,Nestor R. Zenarosa,Hao Wang 대한응급의학회 2021 Clinical and Experimental Emergency Medicine Vol.8 No.1

Objective Burnout is a common occurrence among healthcare providers and has been associated with provider wellness culture. However, this association has not been extensively studied among emergency medicine (EM) providers. We aim to determine the association between EM provider burnout and their culture of wellness, and to elicit the independent wellness culture domains most predictive of burnout prevention. Methods This was a multi-center observational study. We enrolled EM physicians and advanced practice providers from sixteen different emergency departments (EDs). Provider wellness culture and burnout surveys were performed. The wellness culture domains included in this study are personal/organizational value alignment, provider appreciation, leadership quality, self-controlled scheduling, peer support, and family support. Correlations between each wellness culture domain and burnout were analyzed by Pearson correlation co-efficiency, and their associations were measured by multivariate logistic regression with adjustments of other confounders. Results A total of 242 ED provider surveys were entered for final analysis. The overall burnout rate was 54% (130/242). Moderate correlations were found between burnout and two wellness culture domains (value alignment: r=-0.43, P<0.001 and provider appreciation: r=-0.49, P<0.001). The adjusted odds ratio of provider appreciation associated with burnout was 0.44 (95% confidence interval, 0.25–0.77; P=0.004), adjusted odds ratio of family support was 0.67 (95% confidence interval, 0.48–0.95; P=0.025). Conclusion ED providers have a relatively high burnout rate. Provider burnout might have certain associations with wellness culture domains. Provider appreciation and family support seem to play important roles in burnout protection.

Analytical Hierarchy Process in Fuzzy Comprehensive Evaluation Method

Potla Revathi 사단법인 미래융합기술연구학회 2015 아시아태평양융합연구교류논문지 Vol.1 No.3

The use of data innovation is expanding step by step ceaselessly and quickly .concerning expanding of innovation the security episodes likewise expanding. Presently days the innovation gets to be as a part of working together. In light of this innovations the dangers to an associations are likewise expanding quickly. These advances reasons number of security episodes and dangers .These dangers are rises step by step. To diminish every one of these things we need to dissect the danger which are brought on by the dangers. Hazard examination is an imperative apparatus keeping in mind the end goal to settle on right choices. This examination for the most part used to manage the digital dangers. In danger examination we must perform ID and valuation of advantages .If the recognizable proof and valuation of a benefits are not performed appropriately that may result wrong choices in danger investigation. Already such a variety of systems are proposed yet those are exceptionally entangled. Chain of command based resource valuation technique is proposed . The target of this system is to decrease the quantity of blunders.

Foliar Micromorphological Response of In Vitro Regenerated and Field Transferred Plants of Oldenlandia umbellata L.: A Medicinal Forest Plant

Jayabal, Revathi,Rasangam, Latha,Mani, Manokari,Shekhawat, Mahipal Singh Institute of Forest Science 2019 Journal of Forest Science Vol.35 No.1

Plant tissue culture techniques offer quick methods of regeneration of plants of medicinal importance but the survival chances of such plants are always questionable when shifted to the in vivo conditions. The present study enumerates the micromorphological developments in the leaves of in vitro regenerated and field transferred plantlets of Oldenlandia umbellata. The leaves developed in vitro after $4^{th}$ subcultures of multiplication phase and after 6 weeks of field transferred plants were used. Statistically significant differences in the number of stomata, veins, raphides, crystals and trichome density per square mm were observed. The improvements in stomatal apparatus and density (decreased from 41.85 to 32.20), developments in leaf architectural parameters and emergence of defense mechanism through increased numbers of raphides (8 to 15), crystals and trichomes (13.5 to 18.2) proved acclimation of tissue culture raised plantlets from in vitro to the in vivo environments lead to 100 % success in field establishment of the plantlets. The in vitro induced foliar abnormalities (changes in stomata, venation pattern, vein density, trichomes, crystals etc.) were repaired while hardening of plantlets in the greenhouse and finally in the field. The observed micromorphological response of leaves under altered environmental conditions could help in determination of proper stage of field transfer and prediction of survival percentage of in vitro regenerated O. umbellata plantlets.