50 research outputs found
Robustness of Posynomial Geometric Programming Optima
No full textThis paper develops a simple bounding procedure for the optimal value of a posynomial geometric programming (GP) problem when some of the coefficients for terms in the problem's objective function are estimated with error. The bound may be computed even before the problem is solved and it is shown analytically that the optimum value is very insensitive to errors in the coefficients; for example, a 20% error could cause the optimum to be wrong by no more than 1.67%. Key Words: Geometric Programming, Posynomials, Sensitivity Analysis *Corresponding Author Address: Department of Industrial Engineering 1048 Benedum Hall University of Pittsburgh Pittsburgh, PA 15261 e-mail: [email protected] fax: (412) 624-9831 1 Introduction Geometric Programming (GP) is a technique for solving certain classes of algebraic nonlinear optimization problems. Since its original development by Duffin, Peterson and Zener (1967) at the Westinghouse R & D Center, it has been studied extensively and..
Is a one stage or two stage cleft palate repair more beneficial in children with complete one sided cleft palate defects with respect to speech development and palatal fistula formation?
No full textIncidence of cleft Lip and palate in the state of Andhra Pradesh, South India
No full textObjective: To assess the incidence of cleft lip and palate defects in the state of Andhra Pradesh, India. Design Setting: The study was conducted in 2001 in the state of Andhra Pradesh, India. The state has a population of 76 million. Three districts, Cuddapah, Medak and Krishna, were identified for this study owing to their diversity. They were urban, semi-urban and rural, respectively. Literacy rates and consanguinity of the parents was elicited and was compared to national averages to find correlations to cleft births. Type and side of cleft were recorded to compare with other studies around the world and other parts of India. Results: The birth rate of clefts was found to be 1.09 for every 1000 live births. This study found that 65% of the children born with clefts were males. The distribution of the type of cleft showed 33% had CL, 64% had CLP, 2% had CP and 1% had rare craniofacial clefts. Unilateral cleft lips were found in 79% of the patients. Of the unilateral cleft lips 64% were left sided. There was a significant correlation of children with clefts being born to parents who shared a consanguineous relationship and those who were illiterate with the odds ratio between 5.25 and 7.21 for consanguinity and between 1.55 and 5.85 for illiteracy, respectively. Conclusion: The birth rate of clefts was found to be comparable with other Asian studies, but lower than found in other studies in Caucasian populations and higher than in African populations. The incidence was found to be similar to other studies done in other parts of India. The distribution over the various types of cleft was comparable to that found in other studies
Production monitoring and performance of recycled aggregates from construction and demolition waste
No full textThis internship report is about production, monitoring and performance of recycled aggregates (RA) from construction and demolition wastes (CDW). Use of RA can be useful for environmental protection and economic terms. The focus of this internship was to identify the basic properties of RA produced in the company. Natural aggregates present in the Laboratory of Institute Polytechnic of Leiria are used as reference aggregates. Similarly, the properties of RA concrete were determined and explained here. Concrete is prepared considering natural aggregate concrete as base concrete, RA of 20% and RA of 100%. Basic concrete properties like slump test, compressive strength, Ultrasonic pulse velocity test explained here for different combinations. Use of RA has been found useful for pavement construction. Reasons for use of RA in pavement construction, with experimental results are explained here in detail
City Branding in Polycentric Regions: A qualitative study of implementation in three Dutch Cities
No full textThe purpose of this research is to study the implementation of ecological modernization branding in the cities of The Hague, Rotterdam and Utrecht in the Netherlands. These cities use ecological modernization branding to attract people, projects and investments. For example, they may project the image of being ‘smart’ and commission projects to showcase that they are in fact a smart city. However, the overall image that appears from the literature is that there exists a substantial gap between the brand image and its actual implementation. An assessment framework is synthesized in order to carry out this study, this analytical framework addresses numerous aspects: municipal input, throughput and output factors, the local action arena, projects and outcomes to assess the implementation. To this end, the main research question is:How do the three Dutch cities in the ‘Randstad’ i.e. Utrecht, Rotterdam and The Hague implement the programs, policies and attract investments that adhere to the city brands they project?A comparative case study approach is best suited as we can identify similarities, differences and themes across regions and cities using the assessment framework to analyze the cases. Methods used will primarily be desk research and interviews to complement the comparative study and will add nuance to our understanding of ÈM branding. The results revealed three types of EM brand labels present in these cities. Engineering and Policy Analysi
Studies On the Meal and Oil Constituents Of Karanja ( Pongamia Glabra ) Seed
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Conformational modeling of neurokinins: Proposed bio-active conformations for different receptor subtypes
No full textThe conformations of selective analogues of neurokinins, which share a common C-terminal sequence of Phe-X-Val-Gly-Leu-Met-NH\sb2 (where X may be Phe or Val), have been analyzed using Monte Carlo (MC) and high temperature molecular dynamics (MD) techniques. A qualitative model for binding at the different neurokinin receptor sites was generated, based on known conformational preferences of various amino acids, independent of the computations.The conformations generated by MC and MD techniques have been analyzed using structure-activity data as well as solution NMR and CD data, where available. Based on the analyses it is proposed that the biologically relevant conformation for NK-1 receptor sites involves a type I beta turn involving residues Gly-Leu, a type II beta turn involving residues Val-Leu for NK-3 receptor sites, while in NK-2 receptor sites the Gly residue adopts extended conformations. The relationship between the qualitative modeling and the quantitative modeling is discussed. Our model for the NK-1 binding site is different from other proposed models and is supported by more recent experimental studies. The conformation of peptidic and non-peptidic antagonists of NK-1 receptor sites have also been analyzed. These computations have been used to propose a model for agonist vs. antagonist activity at NK-1 receptor sites.Made available in DSpace on 2011-05-07T14:20:12Z (GMT). No. of bitstreams: 2
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Copper(II)-Promoted Regioselective Synthesis of 1,4-Disubstituted 1,2,3-Triazoles in Water
No full textCopper(II)‐Promoted Regioselective Synthesis of 1,4‐Disubstituted 1,2,3‐Triazoles in Water.
No full textDevelopment and validation of the Virtual Identity Integration Scale (VIIS) for young adults aged 18–25
No full textIn the age of digitization, young adults frequently construct and engage with virtual identities on digital platforms. This study aimed to develop and validate the Virtual Identity Integration Scale (VIIS), a psychometrically robust tool to assess the degree of alignment between an individual's virtual and real-world identity. A mixed-methods approach was employed. An initial item pool was generated through literature review, expert consultation, and focus group discussions. The scale was tested on a sample of 600 young adults aged 18–25 years. Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) were conducted, and psychometric properties, including reliability and validity, were assessed. Results identified a five-factor structure: Consistency, Authenticity, Compartmentalization, Role Conflict, and Psychological Impact. The final 25-item VIIS demonstrated strong reliability and validity. This tool contributes significantly to digital identity research and provides a foundation for further psychological and sociological exploration of virtual identity integration
