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Shanker B.,Osmania University | Prabhakar Reddy B.,nter | Anand Rao J.,Osmania University
Indian Journal of Pure and Applied Physics | Year: 2010

The numerical solution of unsteady two-dimensional, laminar, boundary layer flow of a viscous, incompressible, electrically conducting fluid along a semi-infinite vertical plate in the presence of thermal and concentration buoyancy effects under the influence of uniform magnetic field applied normal to the flow, has been obtained. A time-dependent suction is assumed and the radiative flux is described using the differential approximation for radiation. Asymptotic series expansion about a small parameter e is performed to obtain the flow fields. The Galerkin finite element method is used to solve the equations governing the flow. The results obtained are discussed for cooling (G r > 0) and heating (Gr < 0) of the plate with the help of graphs and tables to observe the effects of various parameters such as Pr, Sc, M, Q, K, Nr, kr, A, Gm and G r. It has been found that when the thermal and solutal Grashof numbers increase, the thermal and concentration buoyancy effects are enhanced and the fluid velocity increases. Furthermore, when the Prandtl and Schmidt numbers increase, the thermal and concentration levels decrease resulting in reduced fluid velocity. These results are in good agreement with earlier results. Source


Owen A.J.,University of Iowa | Owen A.J.,nter
Journal of Child Language | Year: 2011

Children with SLI have difficulty with tense and agreement morphology. This study examined the proficiency of these children and their typically developing peers with the coordination of tense and aspect markers in two-clause sentences. Scenarios designed to elicit past tense were presented to five- to eight-year-old children with SLI (n=14) and their normally developing age- and MLU-matched peers (n=24) to examine the omission of tense markers in complex sentences (Owen, 2010). Responses with overt tense/aspect morphology in both clauses were recoded for how similar the use of tense and aspect was across the two clauses. Tense and aspect concordance was high across both sentence types, but aspect-only mismatches were more common than tense mismatches. The three groups of children did not differ from each other on any comparisons. Coordination of temporal information in sentences with more than one time marker does not appear to be especially difficult for these children. © 2010 Cambridge University Press. Source


O'Neil C.E.,nter | Keast D.R.,Food and Nutrition Database Research Inc | Fulgoni V.L.,Nutrition Impact LLC | Nicklas T.A.,Baylor College of Medicine
Asia Pacific Journal of Clinical Nutrition | Year: 2010

Recent epidemiologic studies assessing tree nut (almonds, Brazil nuts, cashews, hazelnuts, macadamia nuts, pecans, pine nuts, pistachios, and walnuts) consumption and the association with nutrient intake and diet quality are lacking. This study determined the association of tree nut consumption and nutrient intake and diet quality using a nationally representative sample of adults. Adults 19+ years (y) (n=13,292) participating in the 1999-2004 National Health and Nutrition Examination Survey were used. Intake was determined from 24-hour diet recalls; tree nut consumers were defined as those consuming ≥1/4; ounce/day (7.09 g). Means, standard errors, and ANOVA (adjusted for covariates) were determined using appropriate sample weights. Diet quality was measured using the Healthy Eating Index-2005. Among consumers, mean intake of tree nuts/tree nut butters was 1.19 ± 0.04 oz/d versus 0.01 ± 0.00 oz/d for non-consumers. In this study, 5.5 ± 0.3 % of individuals 19-50 y (n=7,049) and 8.4 ± 0.6 % of individuals 51+ y (n=6,243) consumed tree nuts/tree nut butters. Mean differences (p<0.01) between tree nut consumers and non-consumers of adult shortfall nutrients were: fiber (+5.0 g/d), vitamin E (+3.7 mg AT/d), calcium (+73 mg/d), magnesium (+95 mg/d), and potassium (+260 mg/d). Tree nut consumers had lower sodium intake (-157 mg/d, p<0.01). Diet quality was significantly higher in tree nut consumers (58.0±0.4 vs. 48.5±0.3, p<0.01). Tree nut consumption was associated with a higher overall diet quality score and improved nutrient intakes. Specific dietary recommendations for nut consumption should be provided for consumers. Source


Oh J.,nter | Kang K.-D.,Binghamton University State University of New York
IEEE Transactions on Knowledge and Data Engineering | Year: 2013

Supporting timely data services using fresh data in data-intensive real-time applications, such as e-commerce and transportation management is desirable but challenging, since the workload may vary dynamically. To control the data service delay to be below the specified threshold, we develop a predictive as well as reactive method for database admission control. The predictive method derives the workload bound for admission control in a predictive manner, making no statistical or queuing-theoretic assumptions about workloads. Also, our reactive scheme based on formal feedback control theory continuously adjusts the database load bound to support the delay threshold. By adapting the load bound in a proactive fashion, we attempt to avoid severe overload conditions and excessive delays before they occur. Also, the feedback control scheme enhances the timeliness by compensating for potential prediction errors due to dynamic workloads. Hence, the predictive and reactive methods complement each other, enhancing the robustness of real-time data services as a whole. We implement the integrated approach and several baselines in an open-source database. Compared to the tested open-loop, feedback-only, and statistical prediction + feedback baselines representing the state of the art, our integrated method significantly improves the average/transient delay and real-time data service throughput. © 1989-2012 IEEE. Source


Park S.Y.,Korea Aerospace University | Choi W.J.,Korea Aerospace University | Choi H.S.,nter
Composite Structures | Year: 2010

In this paper the effect of voids formed in both the glass/epoxy and GLARE laminates on their long-term hygrothermal behaviors are evaluated. By adopting different autoclave pressures during a cure cycle, the specimens with different void contents ranging from 0.5% to 2.0% were obtained for both materials. Two types of hygro and thermal aging tests were then carried out according to water absorption in distilled water and thermal cyclic fatigue up to 1500 cycles, respectively. The resulting behaviors of degradation for both materials due to two types of aging tests were evaluated by the test for interlaminar shear strength which is highly affected by those types of aging. Experimental results indicate that the autoclave pressure enhances a certain extent of the GLARE's interfacial bonding with the low void contents. It therefore leads to an increase in the resistance to the hygro and thermal agings. Crown Copyright © 2009. Source

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