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Search Results: 1 - 10 of 198073 matches for " N. Keerthana "
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An Overview: Security in Virtualization Technology
V. Anitha,N. Keerthana
Journal of Artificial Intelligence , 2013,
Abstract: In IT industries, securing the data plays a vital role. The aim of the study is to improve the security in virtualization technologies. Now-a-days IT industries prefer virtualization methods because it provides high security with low cost. The organizations enhance their security by providing different method through virtualization technology. This study explains the security in major virtualization technologies such as KVM, Xen, VMware and Microsoft.
Some Combinatorial Problems on Halin Graphs
M. Kavin,K. Keerthana,N. Sadagopan,Sangeetha. S,R. Vinothini
Computer Science , 2014,
Abstract: Let $T$ be a tree with no degree 2 vertices and $L(T)=\{l_1,\ldots,l_r\}, r \geq 2$ denote the set of leaves in $T$. An Halin graph $G$ is a graph obtained from $T$ such that $V(G)=V(T)$ and $E(G)=E(T) \cup \{\{l_i,l_{i+1}\} ~|~ 1 \leq i \leq r-1\} \cup \{l_1,l_r\}$. In this paper, we investigate combinatorial problems such as, testing whether a given graph is Halin or not, chromatic bounds, an algorithm to color Halin graphs with the minimum number of colors. Further, we present polynomial-time algorithms for testing and coloring problems.
Awareness of Breast Cancer in Lower Socioeconomic Status Women Attending the Surgery Outpatient Department of a Tertiary Care Teaching Institution  [PDF]
S. Keerthana, Arcot Rekha
Case Reports in Clinical Medicine (CRCM) , 2019, DOI: 10.4236/crcm.2019.88025
Abstract: Background: Worldwide breast cancer represents nearly a quarter (25%) of all cancers and is the most common female cancer. Objective: The present study was conducted to check the awareness of breast cancer warning signs & symptoms, available investigations and treatment options among women of a suburban area in Chennai, Tamilnadu (India). Materials and Methods: A cross-sectional, prospective study was conducted amongst women attending the surgery outpatient department of a tertiary care teaching institution in Chennai, Tamilnadu (India), using a semi-structured questionnaire. The questionnaires were administered during one to one interview by trained research assistants. Results: The study population showed poor awareness of warning signs like changes in position of nipple, pulling in of nipple, nipple rash, changes in size of nipple, puckering/dimpling of breast skin colour changes in breast skin, lump under armpit, changes in size and shape of breast. Conclusion: The observations indicated that the level of awareness and knowledge about the presentation and management of breast cancer is suboptimal among women in Thandalam (suburban Chennai).
Implementing the Functional Model of High Accuracy Fixed Width Modified Booth Multiplier
V. Keerthana,C. Arun Prasath
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: The sustained growth in VLSI technology is fuelled by the continued shrinking of transistor to ever smaller dimension. The benefits of miniaturization are high packing densities, high circuit speed and low power dissipation. Binary multiplier is an electronic circuit used in digital electronics such as a computer to multiply two binary numbers, which is built using a binary adder. A fixed-width multiplier is attractive to many multimedia and digital signal processing systems which are desirable to maintain a fixed format and allow a minimum accuracy loss to output data. This paper presents the design of high-accuracy fixed-width modified Booth multipliers using Carry Look ahead Adder. The high accuracy fixed width modified booth multiplier is used to satisfy the needs of the applications like digital filtering, arithmetic coding, wavelet transformation, echo cancellation, etc. The high accuracy fixed width modified booth multipliers can also be applicable to lossy applications to reduce the area and power consumption of the whole system while maintaining good output quality.
Improved Multispanning Tree Routing Using Efficient and Reliable Routing Algorithm for Irregular Networks
L. Keerthana,K. P. Sampoornam
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: A Strategy of Multispanning Tree Zone Ordered Label Based routing is improved with Efficient and Reliable (EAR) routing for irregular networks is presented and analyzed in this work. Most existing deadlock free routing methods for irregular topologies impose several limitations on node and channel labeling in an irregular network is based on a pre-defined spanning tree.It is not possible to form a deadlock free zone of three or four channel labels for two spanning tree. So this existing Multispanning Tree Zone Ordered Label Based routing is modified with Efficient and Reliable (EAR) routing. EAR is based on four parameters length of the path,distance traversed,transmission of link and energy levels to dynamically determine and maintain the best routes.. The simulation results have shown highest packet delivery ratio, minimum latency, and energy consumption.
Incidence of Ostomies in Tertiary Care Teaching Institution  [PDF]
D. Devi Keerthana, A. Rekha
Case Reports in Clinical Medicine (CRCM) , 2019, DOI: 10.4236/crcm.2019.87022
Abstract: A retrospective observational study was conducted at Saveetha medical college and hospital, over 2 years, from January 2017-January 2019. A total of 29 patients with ostomies were included in this study. Information regarding the types and indications of the ostomies were collected from the hospital records. The collected data were analyzed using Microsoft Excel, and represented by tables and charts. Majority of patients were the males and the predominant age group was 51 - 60 years old. The objective of the present study was to classify ostomies based on organs and to analyze the aetiology for creating those ostomies.
A Review of Gene Delivery and Stem Cell Based Therapies for Regenerating Inner Ear Hair Cells
Keerthana Devarajan,Hinrich Staecker,Michael S. Detamore
Journal of Functional Biomaterials , 2011, DOI: 10.3390/jfb2030249
Abstract: Sensory neural hearing loss and vestibular dysfunction have become the most common forms of sensory defects, affecting millions of people worldwide. Developing effective therapies to restore hearing loss is challenging, owing to the limited regenerative capacity of the inner ear hair cells. With recent advances in understanding the developmental biology of mammalian and non-mammalian hair cells a variety of strategies have emerged to restore lost hair cells are being developed. Two predominant strategies have developed to restore hair cells: transfer of genes responsible for hair cell genesis and replacement of missing cells via transfer of stem cells. In this review article, we evaluate the use of several genes involved in hair cell regeneration, the advantages and disadvantages of the different viral vectors employed in inner ear gene delivery and the insights gained from the use of embryonic, adult and induced pluripotent stem cells in generating inner ear hair cells. Understanding the role of genes, vectors and stem cells in therapeutic strategies led us to explore potential solutions to overcome the limitations associated with their use in hair cell regeneration.
Histomorphometric and sympathetic innervation of the human internal thoracic artery
Reddy, Sreenivasulu;Kumar, Pramod;Prasad, Keerthana;
Clinics , 2011, DOI: 10.1590/S1807-59322011000100023
Abstract: introduction: internal thoracic artery (ita) is an established arterial graft for the coronary artery by-pass surgery. special micro-anatomical features of the ita wall may protect it from age related pathological changes. one of the complications seen after coronary artery bypass grafting is vasospasm. sympathetic nerves may be involved in vasospasm. objective: to ascertain the sympathetic innervation of the internal thoracic artery and to assess the effect of aging on this artery by histomorphometry. method: fifty-four human internal thoracic artery samples were collected from 27 cadavers (19 male and 8 female) with ages of 19 to 83 years. samples were divided into three age groups: g1, 19-40 years; g2, 41-60 years; g3, >61 years. sections (thickness 5 mm) of each sample were taken and stained with hematoxylin-eosin and verhoeff-van gieson stains. five of fifty-four samples were processed for tyrosine hydroxylase immunostaining. results: the thickness of the tunica intima was found to be constant in all age groups, whereas the thickness of the tunica media decreased in proportion to age. verhoeff-van gieson staining showed numerous elastic laminae in the tunica media. significant differences (p<0.0001) in the number of elastic laminae were found between g1 with g2 cadavers, between g2 and g3 cadavers and between g3 and g1 cadavers. tyrosine hydroxylase immunostaining demonstrated sympathetic fibers, located mainly in the tunica adventitia and the adventitia-media border. the sympathetic nerve fiber area and sympathetic index were found to be 0.0016 mm2 and 0.012, respectively. discussion: histology of the ita showed features of the elastic artery. this may be associated with lower incidence of atherosclerosis or intimal hyperplasia in ita samples even in elderly cases. low sympathetic index (0.012) of ita may be associated with fewer incidences of sympathetic nervous systems problems (vasospasm) of the ita. conclusion: sympathetic nerve fibers are present in the a
Comprehensive, structurally-curated alignment and phylogeny of vertebrate biogenic amine receptors
Stephanie Spielman,Keerthana Kumar,Claus O. Wilke
PeerJ , 2015, DOI: 10.7287/peerj.preprints.571v1
Abstract: Biogenic amine receptors play critical roles in regulating behavior and physiology, particularly within the central nervous system, in both vertebrates and invertebrates. These receptors belong to the G-protein coupled receptor (GPCR) family and interact with endogenous bioamine ligands, such as dopamine, serotonin, and epinephrine, and they are targeted by a wide array of pharmaceuticals. Despite these receptors’ clear clinical and biological importance, their evolutionary history remains poorly characterized. In particular, the relationships among biogenic amine receptors and any specific evolutionary constraints acting within distinct receptor subtypes are largely unknown. To advance and facilitate studies in this receptor family, we have constructed a comprehensive, high-quality, structurally-curated sequence alignment of vertebrate biogenic amine receptors. We demonstrate that aligning GPCR sequences without considering structure produces an alignment with substantial error, whereas a structurally-aware approach greatly improves alignment accuracy. Moreover, we show that phylogenetic inference with our structurally-curated alignment offers dramatic improvements over a structurally-naive alignment. Using the structural alignment and its corresponding phylogeny, we deduce novel biogenic amine receptor relationships and uncover previously unrecognized lineage-specific receptor clades. Moreover, we find that roughly 1% of the 3039 sequences in our final alignment are either misannotated or unclassified, and we propose updated classifications for these receptors. We release our comprehensive alignment and its corresponding phylogeny as a resource for future research into the evolution and diversification of biogenic amine receptors.
A Study of Morphological Filtering Using Graph and Hypergraphs
Keerthana S. Prakash,R. P. Prakash,V. P. Binu
Computer Science , 2015, DOI: 10.1109/IADCC.2015.7154858
Abstract: Mathematical morphology (MM) helps to describe and analyze shapes using set theory. MM can be effectively applied to binary images which are treated as sets. Basic morphological operators defined can be used as an effective tool in image processing. Morphological operators are also developed based on graph and hypergraph. These operators have found better performance and applications in image processing. Bino et al. [8], [9] developed the theory of morphological operators on hypergraph. A hypergraph structure is considered and basic morphological operation erosion/dilation is defined. Several new operators opening/closing and filtering are also defined on the hypergraphs. Hypergraph based filtering have found comparatively better performance with morphological filters based on graph. In this paper we evaluate the effectiveness of hypergraph based ASF on binary images. Experimental results shows that hypergraph based ASF filters have outperformed graph based ASF.
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