12 research outputs found
Bioavailability of Iron, Calcium and Zinc in Supplementary Food Formulations
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
In-vitro toxigenic activity of Zingiber zerumbet oil on A. flavus.
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
Conceptual Framework for the Role of Information and Communication Technology (ICT) in achieving the Sustainable Development Goals
Get PDFThis paper seeks to evaluate the role of ICT in achieving the sustainable development goals adopted by the United Nations in 2015. While SDGs do not specifically address ICT, or include a goal on development of ICT, as argued (Berleur & Avgerou, 2005)in this paper, it is an underlying element embedded in the very concept of sustainable development rooted in the definition as propounded by the Brundtland Report. The objective of this paper is to evaluate whether there is a possibility to develop a conceptual framework to ground the use of ICTs in achieving SDGs. For this purpose, this research has evaluated the common conceptual frameworks developed by scholars and posits that rather than developing an all-encompassing framework, it is possible to identify certain necessary features for the role of the ICTs in achieving SDGs. This approach enables policy and decision makers to look at the role of ICT as an integral component of socio-economic and environmental decision making and implementation.
Topics of minimal surfaces and applications
No full textThe theory of minimal surfaces in three-dimensional Euclidean space has its origins in the eighteenth century. As a result of contributions from many prominent mathematicians, a rich theory of minimal surfaces had already been developed by the early nineteenth century. At the same time, these new theories gave birth to new research ideas. Nowadays, applications of minimal surfaces expand through a wide variety of fields.
In this dissertation, we discuss some special topics in minimal surfaces in three-dimensional Euclidean space. Furthermore, we present some numerical applications of minimal surfaces to physical sciences. We first introduce the theory of minimal surfaces in Riemannian manifolds. Next, we provide some of the most significant examples of minimal surfaces, along with their expressions and numerical implementations.
Further, we emphasize the connection between minimal surfaces and complex analysis presented by Weierstrass-Enneper representation. Very importantly, we discuss the Lie-algebraic representation of Weierstrass-Enneper representation which is a modern interpretation of the classical representation.
Finally, we study the existence and non-existence of minimal surfaces bounded by two circles of arbitrary radii in parallel planes. We propose an algorithm to find those catenoidal solutions formed between two coaxial circles for some given boundary conditions. Moreover, we present some numerical results which verify, illustrate and extend the theoretical results we obtained.Embargo status: Restricted to TTU community only. To view, login with your eRaider (top right). Others may request the author grant access exception by clicking on the PDF link to the left
Minimum energy optimal external torque control of human binocular vision
No full text© 2020, The Author(s). cc-byIn this paper, we consider eyes from the human binocular system, that simultaneously gaze on stationary point targets in space, while optimally skipping from one target to the next, by rotating their individual gaze directions. The head is assumed fixed on the torso and the rotating gaze directions of the two eyes are assumed restricted to pass through a point in the visual space. It is further assumed that, individually the rotations of the two eyes satisfy the well known Listing’s law. We formulate and study a combined optimal gaze rotation for the two eyes, by constructing a single Riemannian metric, on the associated parameter space. The goal is to optimally rotate so that the convergent gaze changes between two pre-specified target points in a finite time interval [0, 1]. The cost function we choose is the total energy, measured by the L2 norm, of the six external torques on the binocular system. The torque functions are synthesized by solving an associated ‘two-point boundary value problem’. The paper demonstrates, via simulation, the shape of the optimal gaze trajectory of the focused point of the binocular system. The Euclidean distance between the initial and the final point is compared to the arc-length of the optimal trajectory. The consumed energy, is computed for different eye movement chores and discussed in the paper. Via simulation we observe that certain eye movement maneuvers are energy efficient and demonstrate that the optimal external torque is a linear function in time. We also explore and conclude that splitting an arbitrary optimal eye movement into optimal vergence and version components is not energy efficient although this is how the human oculomotor control seems to operate. Optimal gaze trajectories and optimal external torque functions reported in this paper is new
Parametric study for graphene reinforced aluminum matrix composites production using Box Behnken design
Get PDFThe production of graphene reinforced aluminum matrix composite through powder metallurgical route requires optimization of process parameters to obtain better performance characteristics. One of the advanced method available for statistical analysis of parameters is Response Surface Methodology (RSM). The statistical analysis was carried out with three parameters, weight percentage of graphene reinforcement Wg (0.05%, 0.1% and 0.2%), stirring time ST(1h, 2h and 3h) and compaction pressure Pc(16T, 17T and 19T) while sintering temperature T kept constant. The performance of the Box Behnken design was analyzed and optimized using Design Expert software for the effective production of composites. From the results obtained from the analysis, the best set of parameters were considered for the future production of composites
The GSK3 kinase inhibitor lithium produces unexpected hyperphosphorylation of β-catenin, a GSK3 substrate, in human glioblastoma cells
No full textLithium salt is a classic glycogen synthase kinase 3 (GSK3) inhibitor. Beryllium is a structurally related inhibitor that is more potent but relatively uncharacterized. This study examined the effects of these inhibitors on the phosphorylation of endogenous GSK3 substrates. In NIH-3T3 cells, both salts caused a decrease in phosphorylated glycogen synthase, as expected. GSK3 inhibitors produce enhanced phosphorylation of Ser9 of GSK3β via a positive feedback mechanism, and both salts elicited this enhancement. Another GSK3 substrate is β-catenin, which has a central role in Wnt signaling. In A172 human glioblastoma cells, lithium treatment caused a surprising increase in phospho-Ser33/Ser37-β-catenin, which was quantified using an antibody-coupled capillary electrophoresis method. The β-catenin hyperphosphorylation was unaffected by p53 RNAi knockdown, indicating that p53 is not involved in the mechanism of this response. Lithium caused a decrease in the abundance of axin, a component of the β-catenin destruction complex that has a role in coordinating β-catenin ubiquitination and protein turnover. The axin and phospho-β-catenin results were reproduced in U251 and U87MG glioblastoma cell lines. These observations run contrary to the conventional view of the canonical Wnt signaling pathway, in which a GSK3 inhibitor would be expected to decrease, not increase, phospho-β-catenin levels. This article has an associated First Person interview with the first author of the paper
A qualitative model for customer behavioral decisions and satisfaction in the hospitality industry
No full text© The author(s). This work is licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.It is increasingly important for organizations in the hospitality industry to utilize qualitative, customer-generated content on social media to gain insight into guest perceptions, intentions, and outcomes. On the basis of the service quality model, this research sought to investigate the discrepancy between expected and perceived service. Guest reviews from online review websites like Yelp and TripAdvisor were randomly sampled for 16 hotels across the United States of America. For each hotel, 20 written comments and their corresponding numeric ratings were coded and analyzed using Tropes. We found linkages to both average and positive experiences for staff and linkages to average, positive, and negative experiences for service. Guest experience was linked to staff and service, as well as room, location, meal, and time. Critiques of service, rooms, cleanliness and restaurants were strongly related to staff. Directions for future research, including the utility of crowd-sourced word dictionaries to aid hospitality research are discussed
Phosphorus supplement alters postprandial lipemia of healthy male subjects: A pilot cross-over trial
No full textBackground: Epidemiological studies have found a U-shaped relationship between serum phosphorus and cardiovascular disease (CVD). The mechanism(s) behind such a relationship are poorly understood. Phosphorus (P) is reported to improve insulin sensitivity, which is involved in lipid metabolism, and thus we were interested in determining the impact of phosphorus ingestion on postprandial lipemia, a recognized CVD risk factor. Findings. A within-subject study design was conducted, whereby 8 healthy male subjects received a high fat meal (330Kcal; 69percent energy from fat; 35 mg of phosphorus) with placebo or phosphorus (500 mg) in a random order. Postprandial blood samples (∼10 ml) were collected every hour for 6 hours after meal ingestion. Changes in different parameters were analyzed using a 2-factor repeated-measure ANOVA. In the phosphorus (P) supplemented group, postprandial serum P increased (p = 0.00), while changes in insulin, non-esterified fatty acids (NEFA) and triglyceride (TG) were not significantly different than that of placebo. Concurrently, phosphorus supplementation increased postprandial concentrations of apolipoprotein B48 (ApoB48) (p 0.05) and decreased that of apolipoprotein B100 (ApoB100) (p 0.05). Conclusions: Phosphorus supplementation (500 mg) of the meal seems to alter the different components of postprandial lipemia. These findings highlight the potential role of phosphorus in CVD. © 2014 Hazim et al.; licensee BioMed Central Ltd.Adiels M, 2008, ARTERIOSCL THROM VAS, V28, P1225, DOI 10.1161-ATVBAHA.107.160192; Bhagya V, 2011, INT J BIOL MED RES, V2, P624; Duez H, 2008, ATHEROSCLEROSIS SUPP, V9, P33, DOI 10.1016-j.atherosclerosissup.2008.05.013; Ervin RB, 2004, ADV DATA, V27, P1; Haglin L, 2001, MED HYPOTHESES, V56, P657, DOI 10.1054-mehy.2000.1272; Khattab M, 2011, P NUTR SOC, V70, pE60, DOI 10.1017-S0029665111001005; Kishimoto Y, 2010, BRIT J NUTR, V103, P469, DOI 10.1017-S0007114509992716; Kolovou GD, 2011, CURR VASC PHARMACOL, V9, P258; Lopez-Miranda J, 2007, BRIT J NUTR, V98, P458, DOI 10.1017-S000711450774268X; Masuda D, 2011, J ATHEROSCLER THROMB, V18, P1062; Ooi TC, 2011, CURR VASC PHARMACOL, V9, P302; Park KS, 2011, AM J CLIN NUTR, V94, P1465, DOI 10.3945-ajcn.110.001974; Park W, 2009, DIABETES RES CLIN PR, V83, P119, DOI 10.1016-j.diabres.2008.08.018; Proctor SD, 2002, CURR OPIN LIPIDOL, V13, P461, DOI 10.1097-00041433-200210000-00001; Sabbagh Y, 2011, ADV CHRONIC KIDNEY D, V18, P85, DOI 10.1053-j.ackd.2010.11.004; Shuto E, 2009, J AM SOC NEPHROL, V20, P1504, DOI 10.1681-ASN.2008101106; Talayero Beatriz G, 2011, Curr Cardiol Rep, V13, P544, DOI 10.1007-s11886-011-0220-3; Tonelli M, 2005, CIRCULATION, V112, P2627, DOI 10.1161-CIRCULATIONAHA.105.5531980
