26 research outputs found
Leveraging wireless network virtualizaton for flexible sharing of WLANs
No full textProviding air-time guarantees across a group of clients forms a fundamental building block in sharing an access point (AP) across different virtual network service providers. Though this problem has a relatively simple solution for downlink group scheduling through traffic engineering at the AP, solving this problem for uplink (UL) traffic presents a challenge for fair sharing of wireless hotspots. Among other issues, the mechanism for uplink traffic control has to scale across a large user base, and provide flexible operation irrespective of the client channel conditions and network traffic loads. In this thesis the SplitAP architecture is proposed that addresses the problem of sharing uplink airtime across groups of users by extending the idea of network virtualization. The architecture discussed in this thesis allows different algorithms to be deployed on it for enforcing UL airtime fairness across different client groups. In this thesis, the design features of the SplitAP architecture are highlighted followed by results from evaluation on a prototype deployed with the two algorithms for controlling UL group fairness like: (1) Linear Proportional Feedback Control (LPFC) and (2) Linear Proportional Feedback Control plus (LPFC+). Performance comparisons on the ORBIT testbed show that the proposed algorithms are capable of providing group air-time fairness across wireless clients irrespective of the network volume, and traffic type. The algorithms show up to 40% improvement with a modified Jain fairness index.M.S.Includes bibliographical referencesby Dipti Vet
Predicting traction return current in electric railway systems through physics-informed neural networks
No full textThis paper addresses the problem of determining the distribution of the return current in electric railway traction systems. The dynamics of traction return current are simulated in all three space dimensions by informing the neural networks with the Partial Differential Equations (PDEs) known as telegraph equations. In addition, this work proposes a method of choosing optimal activation functions for training the physics-informed neural network to solve higher-dimensional PDEs. We propose a Monte Carlo based framework to choose the activation function in lower dimensions, mitigating the need for ensemble training in higher dimensions. To further strengthen the applicability of the Monte Carlo based framework, experiments are presented under two loss functions governed by L2 and L∞ norms. The presented method efficiently simulates the traction return current for electric railway systems, even for three-dimensional problems.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Railway Engineerin
Effect of practicing Yoga on Aerodynamic measures of Voice
No full textYoga is a Sanskrit word which interprets to the meaning “the unity of body and mind”. It is a blend of breathing drills, physical stances, and contemplation, and has been practiced in eastern conventional medicine for more than thousands of years [1]. A modest effort was taken in this study to examine the effect of Long term yoga training on Aerodynamic measures and also to compare and contrast these measures between individuals who practice yoga and who don’t.
A total of 120 phonation samples were obtained from participants who practice yoga and who don’t between the age ranges of 20-40 years. Samples assessing respiratory capacities were also taken from the above subjects. Statistical analysis showed a significant difference [p<0.05] between control group and experimental group for all parameters. Significant difference was also seen between genders [p<0.05]. Significant difference was seen in gender within control group [p=0.02] and also within experimental group [p=0.00].
The prevailing study establishes a positive correlation between practicing yoga and betterment in aerodynamic capacities. The results declare that there was significant escalation in vital capacity, maximum phonation duration, phonation quotient and mean air flow rate for individuals who practice regular yoga when compared to people who don’t. The outcome of the present study is a preliminary step towards creating evidence base for the practice of yoga towards overall aerodynamic improvement in healthy adult
Collected Papers (Papers of Mathematics or Applied Mathematics), Volume V
No full textThis volum includes 37 papers of mathematics or applied mathematics written by the author alone or in collaboration with the following co-authors: Cătălin Barbu, Mihály Bencze, Octavian Cira, Marian Niţu, Ion Pătraşcu, Mircea E. Şelariu, Rajan Alex, Xingsen Li, Tudor Păroiu, Luige Vlădăreanu, Victor Vlădăreanu, Ştefan Vlăduţescu, Yingjie Tian, Mohd Anasri, Lucian Căpitanu, Valeri Kroumov, Kimihiro Okuyama, Gabriela Tonţ, A. A. Adewara, Manoj K. Chaudhary, Mukesh Kumar, Sachin Malik, Alka Mittal, Neetish Sharma, Rakesh K. Shukla, Ashish K. Singh, Jayant Singh, Rajesh Singh, V.V. Singh, Hansraj Yadav, Amit Bhaghel, Dipti Chauhan, V. Christianto, Priti Singh, and Dmitri Rabounski
Enhanced piezoresponse of electrospun PVDF mats with a touch of nickel chloride hexahydrate salt
No full textThe Effect of Phytase Produced from Yeast on the Availability of Calcium and Phosphorus Present in Whole Wheat Flour Based Products
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
Eve unchained: Christina Stead's recasting of the Christian spiritual autobiography
No full textChristina Stead, who came of age as a writer in the 1930s, enjoyed trans-Atlantic fame before the outbreak of the Second World War, suffered ignominy and neglect during the Cold War, then rehabilitation as a precursor of Third Wave Feminism—a role which she flatly rejected (Wetherell, Whitehead). Readings of her oeuvre have similarly fluctuated, from early reviews that praised her imaginative exuberance or social insights (Rowley 156, 246), to more recent emphasis on her depiction of women's plight and the profound dependence of her fiction on lived experience. For instance, according to Hazel Rowley's definitive, award-winning biography, Stead was far more interested in her characters, often based on friends, than ideas, and sought to write with "an intelligent ferocity (316). And creative ardour, fuelled by personal animus, is undeniably an aspect of her fiction, as when stark repulsion for fellow novelist and Communist, Ruth McKenney, resurges in long stretches of her last novel, I'm Dying Laughing (Rowley 361–64), or in the diverse ways her most famous book, The Man Who Loved Children, represents a delayed fictional reckoning with her overbearing father (Rowley 258–63). Indeed, if Rowley's account is to be believed, key Stead texts are strikingly autobiographical, while vividly evoked scenes and occasional pieces are someimes little more than autobiographical vignettes. The great marlin-boiling scene in The Man Who Loved Children, for example, can be traced back to her own family's boiling down of a captured shark in their backyard at Watson's Bay (Stead 1985 490), or the writer's final effort, "The Old School," is practically dismissed as easy material, ready to hand for an exhausted, largely disinterested author (Rowley 540). Yet the quest for alleged biographical parallels or sources can readily become reductive, especially when, as I hope to show, Stead's understanding and use of autobiographical material and tradition was complexly inflected by her role as both an engaged and a female author
Atypical transitions in material response during constant strain rate, hot deformation of austenitic steel
No full textHead Start and child care providers' feeding practices: a potential avenue for obesity prevention in young children
No full textThe Academy of Nutrition and Dietetics released a position statement in 2012 regarding benchmarks for nutrition in child care to establish healthful eating behaviors in early childhood and prevent obesity in young children. Further, recent publications by the Institute of Medicine and national organizations have recommended specific feeding practices for child care providers to be implemented at the state-level to prevent early childhood obesity in preschool children. Although over 12 million US children in child care consuming up to 5 meals and snacks per day in such settings, little is known about child care providers’ feeding practices.
The purpose of this dissertation was to examine provider’s feeding practices in Head Start and child care programs with the following aims 1) To assess whether providers met the Academy’s benchmarks and if attainment of benchmarks varied across child care contexts (Head Start [HS], Child and Adult Care Food Program [CACFP] and non-CACFP). 2) To identify determinants of child care providers’ healthful and controlling feeding practices for 2-5y-old children. 3) To identify Head Start and child care provider’s motivators, barriers and facilitators for using family style meal service (FSMS) during child care mealtimes.
Cross-sectional data was collected in 2011 and 2012 where 118 child care providers from 24 center-based programs (6 Head Start [HS], 11 Child and Adult Care Food Program [CACFP] funded, 7 non-CACFP) completed self-administered surveys regarding their feeding practices for 2-5-year-old children. Chi-square tests and Analysis of variance were used to determine variation in meeting benchmarks across contexts. Multi-level multivariate linear regression models were used to predict seven feeding practices- healthful (allowing children to control their food intake, role modeling healthy eating and teaching children about nutrition) and controlling (pressuring children to eat and restricting access to food for health or weight control). For aim 3, qualitative semi-structured interviews were conducted with a subset of providers based on maximum variation purposive sampling. The interviews were lead until saturation was reached and the data was coded using thematic analysis by NVivo qualitative software.
It was found that HS providers had greater compliance with the Academy’s benchmarks compared to CACFP and non-CACFP providers. HS providers sat more frequently with children during meals (P=0.01), ate the same foods as children (P=0.001) and served meals family-style (P<0.0001) more often, compared to CACFP and non-CACFP providers. HS providers (P=0.002), parents (P=0.001) and children (P=0.01) received more nutrition education opportunities compared to CACFP and non-CACFP. HS providers encouraged more balance and variety of foods (P<0.05), offered healthier foods (P<0.05), modeled healthy eating (P<0.001), and taught children about nutrition (P<0.001) compared to CACFP and non-CACFP providers. Providers across all three contexts used significantly more non-internal than internal mealtime verbal comments (P<0.0001).
Regarding predictors of provider’s feeding practices; working in a HS center predicted teaching children about nutrition and modeling healthy eating; that may be attributed to the HS performance standards which require HS providers to practice healthful feeding. Providers who reported being concerned about children’s weight, responsible for feeding children and had an authoritarian feeding style were more likely to pressure children to eat, restrict intake, and control food intake to decrease or maintain children’s weight. Providers with non-White race, who were trying to lose weight, perceived nutrition as important in their own diet, and had greater number of nutrition training opportunities were more likely to use restrictive feeding practices. Findings suggest that individual and child care level factors, particularly provider race, education, training, feeding attitudes and styles and the child care context may influence providers’ feeding practices with young children.
A qualitative investigation of the motivators, barriers and facilitators for using family style meal service (FSMS) from the perspective of 18 child care providers revealed that HS and CACFP providers were motivated to use FSMS because it created pleasant mealtimes, opportunities to role model healthy eating, and healthful child development. CACFP and non-CACFP providers reported not using FSMS because it was resource intensive, messy, unhygienic, and seemed to violate CACFP policy. HS and CACFP providers recommended strategies to overcome these barriers. They suggested that FSMS becomes easier with practice and teaching children self-help skills during play time can avoid messes during mealtimes.
Possible reasons for an increased compliance of HS providers to the Academy’s benchmarks may be attributed to HS federal performance standards for child nutrition and increased nutrition training opportunities for HS staff. HS programs can serve as a model in implementing the Academy’s benchmarks. Considering the predictors of providers feeding practices identified by this study when developing interventions, may add to the efficacy of childhood obesity prevention programs. The present research offers new insights not only regarding providers’ barriers to FSMS, but also strategies from providers to help overcome these barriers and allow for effective implementation of FSMS in child care settings. Providers should be encouraged to adopt FSMS, because the long-term health consequences and learning opportunities of FSMS outweigh any barriers related to its practical implementation. By strengthening policies and training that are more aligned with the Academy’s benchmarks, child care providers can be in a unique position to prevent childhood obesity by instilling positive eating behaviors related to self-regulation of the preschool-aged children in their care.Item withdrawn by Laura Spradlin ([email protected]) on 2013-11-25T23:14:56Z
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