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Search Results: 1 - 10 of 134 matches for " Venu Kurella "
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Consolidating Birth-Death and Death-Birth Processes in Structured Populations
Joshua Zukewich, Venu Kurella, Michael Doebeli, Christoph Hauert
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0054639
Abstract: Network models extend evolutionary game theory to settings with spatial or social structure and have provided key insights on the mechanisms underlying the evolution of cooperation. However, network models have also proven sensitive to seemingly small details of the model architecture. Here we investigate two popular biologically motivated models of evolution in finite populations: Death-Birth (DB) and Birth-Death (BD) processes. In both cases reproduction is proportional to fitness and death is random; the only difference is the order of the two events at each time step. Although superficially similar, under DB cooperation may be favoured in structured populations, while under BD it never is. This is especially troubling as natural populations do not follow a strict one birth then one death regimen (or vice versa); such constraints are introduced to make models more tractable. Whether structure can promote the evolution of cooperation should not hinge on a simplifying assumption. Here, we propose a mixed rule where in each time step DB is used with probability and BD is used with probability . We derive the conditions for selection favouring cooperation under the mixed rule for all social dilemmas. We find that the only qualitatively different outcome occurs when using just BD (). This case admits a natural interpretation in terms of kin competition counterbalancing the effect of kin selection. Finally we show that, for any mixed BD-DB update and under weak selection, cooperation is never inhibited by population structure for any social dilemma, including the Snowdrift Game.
Chemoprophylaxis in sexually transmitted HIV/AIDS lung diseases
Venu K
Lung India , 2006,
Abstract:
Wahlsystemwandel in Südosteuropa: zur Stabilit t von Wahlsystemen im postsozialistischen Raum
Jacob Venu
Südosteurop?ische Hefte , 2012,
Abstract: Electoral systems are one of the most fundamental elements in modern democratic systems. Based on observations in Western democracies since World War II they are commonly regarded as very stable institutional structures. Thus the study of electoral systems is affected by the neo-institutionalist paradigm of stability which assumes that changes in the electoral system can only be observed in “extraordinary historical situations”. But the developments in electoral systems in Central and Eastern European countries in the past 20 years reveal a very different picture. These countries went through a number of changes in their respective electoral systems in varying degrees and do not fit into the described paradigm of stability. The article1 focuses on the question why the degree of electoral system stability is in some countries higher than in others. At the center of the analysis is the investigation of the respective electoral systems of five succession states of former Yugoslavia (Serbia, Croatia, Slovenia, Macedonia and Montenegro) which are checked against theoretical hypotheses about the reasons for stability or respectively instability. The most similar case design methodology is applied to this analysis, which belongs to the scientific field of area studies. On the one hand the study develops and tests four hypothesis based on rational theoretical concepts of political science which understand institutional change as driven by self-interests of the political actors (parties). On the other hand it assembles empirical data of the Balkan region to generate specific regional results in regard to electoral system stability and tries to close an obvious gap in the scientific research in this field of political science. The main theoretical findings of the analysis presented in this article are that electoral system changes are tightly connected to the question of who benefits from the new electoral systems and that these changes are thusly consciously enforced by self-interest of the political actors.
Multi-core processors - An overview
Balaji Venu
Computer Science , 2011,
Abstract: Microprocessors have revolutionized the world we live in and continuous efforts are being made to manufacture not only faster chips but also smarter ones. A number of techniques such as data level parallelism, instruction level parallelism and hyper threading (Intel's HT) already exists which have dramatically improved the performance of microprocessor cores. This paper briefs on evolution of multi-core processors followed by introducing the technology and its advantages in today's world. The paper concludes by detailing on the challenges currently faced by multi-core processors and how the industry is trying to address these issues.
Biochemical Composition and Disease Resistance in Newly Synthesized Amphidiploid and Autotetraploid Peanuts  [PDF]
Krishna Shilpa, Gururaj Sunkad, Srinivasu Kurella, Swati Marri, Kollipara Padmashree, Deepak R. Jadhav, Kanwar Lal Sahrawat, Nalini Mallikarjuna
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.42024
Abstract:

Genetic diversity in peanut (Arachishypogaea L.) is narrow due to its evolution and domestication processes. Amphidiploids and autotetraploids (newly synthesized tetraploids) were created to broaden its genetic base. Molecular analysis has shown that the newly synthesized tetraploids had broader genetic base; and were genetically divergent when compared to cultivated peanut. Nutritional composition relative to oil, fatty acid composition, O/L ratio, protein, iodine value and presence of plant proteinase inhibitors such as trypsin and chymotrypsin inhibitors were studied in the synthesized tetraploids. Some of the newly synthesized tetraploids had higher amounts of proteinase inhibitors. Evaluation of newly synthesized tetraploids revealed several lines resistant to late leaf spot (LLS) and peanut bud necrosis disease (PBND).

Continuity in Partially Ordered Sets
Venu G. Menon
International Journal of Mathematics and Mathematical Sciences , 2008, DOI: 10.1155/2008/321761
Abstract: The notion of a continuous domain is generalized to include posets which are not dcpos and in which the set of elements way below an element is not necessarily directed. We show that several of the pleasing algebraic and topological properties of domains carry over to this setting.
Sex Disparity in Food Allergy: Evidence from the PubMed Database
Caleb Kelly,Venu Gangur
Journal of Allergy , 2009, DOI: 10.1155/2009/159845
Abstract: Food allergies are potentially fatal immune-mediated disorders that are growing globally. The relationship between sex and food allergy remains incompletely understood. Here we tested the hypothesis that, should sex influence the clinical response to food allergens, this would be reflected by a sex disparity in published studies of food allergy. We performed a systematic search of the PubMed literature for IgE-mediated allergy to 11 allergenic foods of international regulatory importance. No date restriction was used and only articles in English were considered. Of the 4744 articles retrieved, 591 met the inclusion criteria representing 17528 subjects with food allergies. Whereas among children with food allergies, 64.35% were males and 35.65% were females (male/female ratio, 1.80), among adults 34.82% were males and 65.18% were females (male/female ratio, 0.53). Consequently, these data argue that there is need for further investigation to define the role of sex in the pathogenesis of food allergy.
The Phospha–Michael addition product {(t-BuNH)P(μ-N-t-Bu)2P(=N-t-Bu)—C(=CH2)CH(p-CH3O—C6H4)-P(O)[(OCH2C(CH3)2CH2O)]}
G. Gangadhararao,Srinivas Venu
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811014127
Abstract: The title compound, 2-{2-[1,3-di-tert-butyl-4-(tert-butylamino)-2-(tert-butylimino)-1,3,2λ5,4-diazadiphosphetidin-2-yl]-1-(4-methoxyphenyl)prop-2-en-1-yl}-5,5-dimethyl-1,3,2λ5-dioxaphosphinan-2-one, C31H57N4O4P3, was synthesized from the Phospha–Michael addition reaction of cyclodiphosphazane [(t-BuNH)P(μ-Nt-Bu)]2 and allenylphosphonate [(OCH2C(CH3)2CH2O)P(O)C(p-CH3O—C6H4)=C=CH2]. In the crystal, N—H...O and C—H...O hydrogen bonds link the molecules. The structure exhibits pseudosymmetry but attempts to solve it in a higher (monoclinic) space group were unsuccessful.
High secured and area optimized Online Memory Testing for efficient Fault Diagnostic Systems
Takkellapati Venu Gopi 1
International Journal of Engineering Trends and Technology , 2013,
Abstract: The main intention of this project is to recommend a fault diagnoses structure for revealing of any software or hardware or permanent failures in the embedded read only memories. BIST controller, along with row selector and column selector is designed to meet necessities of at speed test thus enabling detection of timing defects. The projectedapproach offers a simple test flow and does not require intensive communications between a BIST controller and a tester. The system rests on partitioning of rows and columns of the memory array by employing low cost test logic. It is intendedto meet requirements of at-speed test thus enabling detection of timing defects.
Comprehensibility of translated informed consent documents used in clinical research in psychiatry
Jhanwar Venu,Bishnoi Ram
Indian Journal of Psychological Medicine , 2010,
Abstract: Background: Informed consent forms are required in all clinical trials which are approved by an independent Ethics Committee before practical use in the trials. However, how much the average subject actually understands of the information contained in these informed consent forms is uncertain. Aim: In a cross sectional study, the translated informed consent forms used in psychiatric clinical trials were assessed with respect to their ease of readability. Materials and Methods: We analyzed 30 informed consent forms translated from English to Hindi used in multinational and multicentre psychiatric clinical trials sponsored by different sponsors. We examined consent forms for readability scores and factors that might relate to readability. Results: The mean readability score for the informed consent forms, determined by the Flesch-Kincaid Grade Level Index (FKGL) was grade levels of 13.66. The ease of readability assessed by the Flesch Reading Ease Score (FRES) was 46.08 suggesting significant complexity of the texts. These values carry even more significance when the average years of schooling for India as a whole are 6.2 years. Conclusion: Our results show that the most informed consent forms were too complex to understand by an average adult subject. We suggest reducing this complexity and increasing the ease of readability so those average subjects receive the intended information as exactly as it could be. This can be achieved by few simple measures like improving the deficiencies in translation processes, encouraging the investigators to participate while preparing these forms, and enhanced understanding of the site specific requirements, namely culture, language (dialect), general literacy rate, etc.
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