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Search Results: 1 - 10 of 223697 matches for " R. Prema "
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Power Aware Routing Protocol (PARP) for Wireless Sensor Networks  [PDF]
R. Prema, R. Rangarajan
Wireless Sensor Network (WSN) , 2012, DOI: 10.4236/wsn.2012.45019
Abstract: Several wireless sensor network applications ought to decide the intrinsic variance between energy efficient communication and the requirement to attain preferred quality of service (QoS) such as packet delivery ratio, delay and to reduce the power consumption of wireless sensor nodes. In order to address this challenge, we propose the Power Aware Routing Protocol (PARP), which attains application-specified communication delays at low energy cost by dynamically adapting transmission power and routing decisions. Extensive simulation results prove that the proposed PARP attains better QoS and reduced power consumption.
RETRACTED: Generation of Pascal Triangle Using Matrices  [PDF]
Prema R. Balasubramani
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2017, DOI: 10.4236/alamt.2017.74008

Short Retraction Notice

The paper does not meet the standards of \"Advances in Linear Algebra & Matrix Theory\".

This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.

Editor guiding this retraction: Prof. Mubariz Garayev and Prof. Qingwen Wang (EiC of ALAMT)

Please see the article page for more details. The full retraction notice in PDF is preceding the original paper which is marked \"RETRACTED\".

Corrosion of Water Pipes: a Comprehensive Study of Deposits  [PDF]
Vikas Chawla, Prema G. Gurbuxani, G.R. Bhagure
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2012, DOI: 10.4236/jmmce.2012.115034
Abstract: Corrosion scales play an important role in modifying water quality in drinking water distribution systems. The corrosion scales from old water pipe lines were analyzed for their structure and composition. This paper presents the results of comprehensive study of deposits found in water distribution system of Ulhasnagar city of Maharashtra, India. Scales were investigated by XRD, FTIR, SEM and ED’s analytical techniques. It was found that goethite, magnetite, lepidocrocite, hematite and Akaganite were identified as the primary constituents of brown deposits. The corrosion scales had a shell-like, enveloping layer, covering porous deposits of iron oxide phases. Our studies were able to identify important constituents of three different pipes of water distribution systems. Akaganite was found to be present in chloride environment. Along with iron hydroxide phases it was found that corrosion product also contain some organic matter which may be due to adsorption of biofilm on the surface of pipe. Further studies are needed to establish the role of corrosion scales in the mechanism of iron release from corroded pipes.
Bone morphogenetic protein-4 affects both trophoblast and non-trophoblast lineage-associated gene expression in human embryonic stem cells  [PDF]
Margaret L. Shirley, Alison Venable, Raj R. Rao, Nolan L. Boyd, Steven L. Stice, David Puett, Prema Narayan
Stem Cell Discovery (SCD) , 2012, DOI: 10.4236/scd.2012.24021
Abstract: Human embryonic stem cells (hESC) can be induced to differentiate to trophoblast by bone morphogenetic proteins (BMPs) and by aggregation to form embryoid bodies (EB), but there are many differences and controversies regarding the nature of the differentiated cells. Our goals herein were to determine if BG02 cells form trophoblast-like cells (a) in the presence of BMP4-plus-basic fibroblast growth factor (FGF-2) and (b) upon EB formation, and (c) whether the BMP4 antagonist noggin elicits direct effects on gene expression and hormone production in the cells. Transcriptome profiling of hESC incubated with BMP4/FGF-2 showed a down-regulation of pluripotency-associated genes, an up-regulation of trophoblast-associated genes, and either a down-regulation or no change in gene expression for many markers of the three embryonic germ layers. Yet, there was up-regulation of several genes associated with mesoderm, ectoderm, and endoderm, strongly suggesting that differentiation to trophoblast-like cells under the conditions used does not yield a homogeneous cell type. Several genes, heretofore unreported, were identified that are altered in hESC in response to BMP4-mediated differentiation. The production of human chorionic gonadotropin (hCG), progesterone, and estradiol in the differentiated cells confirmed that trophoblast-like cells were obtained. Gene expression by EB was characterized by an up-regulation of a number of genes associated with trophoblast, ectoderm, endoderm, and mesoderm, and the production of hCG and progesterone confirmed that trophoblast-like cells were formed. These results suggest that, in the presence of FGF-2, BG02 cells respond to BMP4 to yield trophoblast-like cells, which are also obtained upon EB formation. Thus, BMP4-mediated differentiation of hESC represents a viable cell system for studying early developmental events post-implantation; however, up-regulation of non-trophoblast genes suggests a somewhat diverse response to BMP4/FGF-2. Noggin altered the transcription of a limited number of genes but, not surprisingly, did not lead to secretion of hormones.
Posterior urethral valves: Morphological normalization of posterior urethra after fulguration is a significant factor in prognosis
Menon Prema,Rao K. L. N.,Vijaymahantesh S,Kanojia R
Journal of Indian Association of Pediatric Surgeons , 2010,
Abstract: Aim: To assess the changes in urethral morphology 3 months post fulguration of posterior urethral valves (PUVs) on micturating cystourethrogram (MCUG) and correlate these changes with the overall clinical status of the patient. Materials and Methods: A total of 217 children, managed for PUVs during a period of 6 years in a single surgical unit were prospectively studied. The ratio of the diameters of the prostatic and bulbar urethras (PU/BU) was calculated on the pre- and post-fulguration MCUG films. They were categorized into three groups based on the degree of normalization of posterior urethra (post-fulguration PU/BU ratio). Results: Group A: Of the 133 patients, 131 had normal urinary stream and 4 (3%) had nocturnal enuresis. Vesicoureteral reflux (VUR), initially seen in 83 units (31% units), regressed completely at a mean duration of 6 months in 41 units (49%). Of the 152 non-VUR, hydroureteronephrosis (HUN) units, 11 were poorly functioning kidneys. Persistent slow but unobstructed drainage was seen in 23 units (16%) over a period of 1.5-5 years (mean 2.5 years). Group B: All the 11 patients had a normal stream. Four (36.4%) had daytime frequency for a mean duration of 1 year and one (9%) had nocturnal enuresis for 1 year. Grade IV-V VUR was seen in five patients (three bilateral), which regressed completely by 3 months in five units (62.5%). In the non-VUR, HUN patients, slow (but unobstructed) drainage was persistent in two units (14%) at 3 years. Group C: Of the 16 patients, only 5 (31.3%) were asymptomatic. Six patients (nine units) had persistent VUR for 6 months to 3 years. Of the 20 units with HUN, 17 (85%) were persistent at 1-4 years (mean 2 years). Eight patients (50%) required a second fulguration while 3 (18.7%) required urethral dilatation for stricture following which all parameters improved. Conclusions: Adequacy of fulguration should be assessed by a properly performed MCUG. A postop PU/BU ratio >3 SD (1.92) should alert to an incomplete fulguration or stricture. Patients within normal range ratio have faster recovery of slow draining units, reflux and less voiding dysfunction. There is a strong correlation between incomplete fulguration and persistent slow draining units, uremia, voiding dysfunction and urinary tract infections.
An Active Rule Approach for Network Intrusion Detection with Enhanced C4.5 Algorithm  [PDF]
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2008, DOI: 10.4236/ijcns.2008.14039
Abstract: Intrusion detection systems provide additional defense capacity to a networked information system in addition to the security measures provided by the firewalls. This paper proposes an active rule based enhancement to the C4.5 algorithm for network intrusion detection in order to detect misuse behaviors of internal attackers through effective classification and decision making in computer networks. This enhanced C4.5 algorithm derives a set of classification rules from network audit data and then the generated rules are used to detect network intrusions in a real-time environment. Unlike most existing decision tree based approaches, the spawned rules generated and fired in this work are more effective because the information-theoretic approach minimizes the expected number of tests needed to classify an object and guarantees that a simple (but not necessarily the simplest) tree is found. The main advantage of this proposed algorithm is that the generalization ability of enhanced C4.5 decision trees is better than that of C4.5 decision trees. We have employed data from the third international knowledge discovery and data mining tools competition (KDDcup’99) to train and test the feasibility of this proposed model. By applying the enhanced C4.5 algorithm an average detection rate of 93.28 percent and a false positive rate of 0.7 percent have respectively been obtained in this work.
The Legal Status Of Women In India
Golden Research Thoughts , 2012, DOI: 10.9780/22315063
Abstract: The movement for the improvement of the legal status of women was an integral part of the general movement for the emancipation of women and was inspired by the equalitarian idea. The marriage laws, the property laws and the personal laws are some of the legal methods by which woman can be made subordinate to man. The social reformers and in the later phases women themselves realised the obstacles in the way of full freedom and free development of women and therefore they advanced demands for improving their legal status also.
Lactational Infertility- A Review
Ramachandran Prema
Indian Journal of Community Medicine , 1987,
Abstract: Studies undertaken by the National Institute of Nutrition during the last 10 years indicate that prolonged breast-feeding is still the rule among rural and urban low income group population in Hyderabad. Lactation induced hyperprolactinaemia prolongs postpartum amenorrhea and inter pregnancy interval by about 6 months. Duration of lactational amenorrhea infants results in a fall of plasma prolactin levels and rapid return of menstruation and fertility. Lactational amenorrhea lasts longer in undernourished women with low body weight and low fat fold rural women, duration of lactational amenorrhea is longer as compared to urban women. This might be partly attributable to the delay in introduction of supplements to the rural infants and partly to the lower body weight and fat fold thickness of rural women.
Indian Streams Research Journal , 2012,
Abstract: This paper tries to explain the development of women movement in India and the status of women during the Vedic period and British period. It also tries to explain the position of women on the basis of socioeconomic – political empowerment.
Akilandeswari .S,R.Senthamarai,,Prema.S,,R.Valarmathi
International Journal of Pharma Sciences and Research , 2010,
Abstract: Phytochemical investigations, Antibacerial and antifungal activity studies for leaf extracts of Sida acuta were carried out. Two common solvents i.e Chloroform and Ethanol (95%) were used successively for extraction of active principles from the dried powdered leaves. The Phytochemical tests of extracts revealed the Presence of Carbohydrates, Alkaloids, Phytosterols, Saponins and fixed Oils.The antimicrobial screening was done with two Gram +ve (Staphylococcus aureus NCIM 2079, Bacillus subtilis NCIM 2063) and two Gram –ve (E.coli NCIM 2065 Pseudomonas aeruginosa NCIM 2036) bacteria and fungi (Candida albicans NCIM 3102, Aspergillus niger NCIM 1054) as test microorganisms. All the three microorganisms were markedly effected by both the extracts under study.
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