Computer simulation and evaluation of solar cooling systems with hot and cold storage options

In this thesis, computer simulation and evaluation of solar cooling systems are presented. The simulations were conducted using the TRNSYS program, developed at the University of Wisconsin. The TRNSYS program was modified by the addition of new models for the solar collector with high fluid thermal capacity, the absorption cooler, and a systems controller. These models are described. Several aspects of solar cooling systems design are presented here. The options of storing surplus availability at temperatures greater than 76°C (hot storage) and at temperatures less than 12°C (cold storage) are examined and discussed in detail. Analysis is also conducted to determine solar collector exiting temperature response to abrupt changes in solar insolation, with collector fluid thermal capacity and airconditioner nominal capacity as parameters. The affect of sink temperature on system performance and the question of using cooling towers are investigated. Problems associated with computer simulations and their solutions are discussed. The results indicate that the system with the cold storage consumes less auxiliary energy than the system with the hot storage, both systems being of equal size and capacity. However, the system with the cold storage requires a solar collector with high fluid thermal capacity. With regard to the effect of sink temperature on system performance, there is a sharp drop in the performance for sink temperatures exceeding 25°C

?Contingency Ranking and Analysis using Power System Analysis Toolbox (PSAT)

In this paper according to the increasing utilization in power system, the transmission lines and power plants often operate in stability boundary and system probably lose its stable condition by over loading or occurring disturbance. According to the reasons that are mentioned, the prediction and recognition of voltage instability in power system has particular importance and it makes the network security stronger. This paper, by considering of power system contingencies based on the maximum loading parameter point is focused in order to analyze the static voltage stability using continuation power flow method. The study has been carried out on IEEE 14-Bus Test System using Power System problem has been solved by using PSAT with Matlab and results are presented. Keywords- Contingency ranking, Continuation Power Flow, Psat Voltage Stabilit

Irritation fibroma of tongue: a case report

Reactive hyperplastic outgrowths are seen in the oral cavity due to chronic irritation by plaque, calculus, overhanging margins, trauma and dental appliances.  Irritation fibroma represents a reactive focal fibrous hyperplasia due to trauma or local irritation. We report a case of irritation fibroma of right lateral border of tongue in a 46-year-old female

Automorphism groups of Grassmann codes

We use a theorem of Chow (1949) on line-preserving bijections of Grassmannians to determine the automorphism group of Grassmann codes. Further, we analyze the automorphisms of the big cell of a Grassmannian and then use it to settle an open question of Beelen et al. (2010) concerning the permutation automorphism groups of affine Grassmann codes. Finally, we prove an analogue of Chow's theorem for the case of Schubert divisors in Grassmannians and then use it to determine the automorphism group of linear codes associated to such Schubert divisors. In the course of this work, we also give an alternative short proof of MacWilliams theorem concerning the equivalence of linear codes and a characterization of maximal linear subspaces of Schubert divisors in Grassmannians.Comment: revised versio

Polder Tidings, Volume 1, Number 1, May 2016

United States Agency for International Developmen

Oral impacts on daily performances in white-collar port workers in Nellore, India — a cross-sectional study

Background: Oral diseases not only cause pain, but severely impair large number of individuals and can affect various aspects of life, including oral functions, appearance and interpersonal relationships. The aim of the study was to assess the interrelationship between oral impact on daily performance (OIDP) scores, socio-demographic characteristics, dental caries experience and periodontal status. Materials and methods: A cross-sectional descriptive epidemiological study was conducted on a sample of 250 white-collar port workers who were willing to participate. OIDP was assessed using pre-validated questionnaire. Oral health status was assessed using modified World Health Organisation (1997) Proforma. Test of association was conducted between the OIDP score, socio-demographic variables, and periodontal status; loss of attachment was determined by using chi-square statistics and Mann-Whitney test. Logistic regression was performed to identify significant predictors of OIDP scores by inputting clinical oral examination variables into the equation, stepwise. Results: A total of 250 white-collar workers in the port participated in the study with mean age of 34.67 ± 6.36. Among them, 219 were males and 31 were females. The OIDP items most commonly affected by oral health status were eating and enjoying food (48.4%), cleaning teeth (48%), sleeping and relaxing (44.4%).There was statistically significant relationship between missing teeth in the decayed missing filled teeth component and OIDP score (p < 0.001). The participants with caries have a greater odd (2.11) of having OIDP score ≥ 1 than those without caries. The participants with missing teeth have a greater odd (3.60) of having OIDP score ≥ 1. The participants in the age group of 31–40 years had a greater odd (2.80) of having OIDP score ≥ 1. Conclusions: Oral health had an impact on the quality of life of white-collar workers in the port. Physical functions of teeth like eating and cleaning of teeth, sleeping and relaxing were more affected.

CellMiner: a relational database and query tool for the NCI-60 cancer cell lines

<p>Abstract</p> <p>Background</p> <p>Advances in the high-throughput omic technologies have made it possible to profile cells in a large number of ways at the DNA, RNA, protein, chromosomal, functional, and pharmacological levels. A persistent problem is that some classes of molecular data are labeled with gene identifiers, others with transcript or protein identifiers, and still others with chromosomal locations. What has lagged behind is the ability to integrate the resulting data to uncover complex relationships and patterns. Those issues are reflected in full form by molecular profile data on the panel of 60 diverse human cancer cell lines (the NCI-60) used since 1990 by the U.S. National Cancer Institute to screen compounds for anticancer activity. To our knowledge, CellMiner is the first online database resource for integration of the diverse molecular types of NCI-60 and related meta data.</p> <p>Description</p> <p>CellMiner enables scientists to perform advanced querying of molecular information on NCI-60 (and additional types) through a single web interface. CellMiner is a freely available tool that organizes and stores raw and normalized data that represent multiple types of molecular characterizations at the DNA, RNA, protein, and pharmacological levels. Annotations for each project, along with associated metadata on the samples and datasets, are stored in a MySQL database and linked to the molecular profile data. Data can be queried and downloaded along with comprehensive information on experimental and analytic methods for each data set. A Data Intersection tool allows selection of a list of genes (proteins) in common between two or more data sets and outputs the data for those genes (proteins) in the respective sets. In addition to its role as an integrative resource for the NCI-60, the CellMiner package also serves as a shell for incorporation of molecular profile data on other cell or tissue sample types.</p> <p>Conclusion</p> <p>CellMiner is a relational database tool for storing, querying, integrating, and downloading molecular profile data on the NCI-60 and other cancer cell types. More broadly, it provides a template to use in providing such functionality for other molecular profile data generated by academic institutions, public projects, or the private sector. CellMiner is available online at <url>http://discover.nci.nih.gov/cellminer/</url>.</p

Analysis of Blood Donor Deferral Causes in a Tertiary Care Teaching Hospital: A Key to Recruit Blood Donors

Background: Blood donors are rejected for various reasons. Deferred donors generally have a negative feel¬ing about themselves as well as the blood donation process and in future, these donors are less likely to return for blood donation. Retention and re-entry of these temporarily deferred donors can be achieved by analyzing the reasons of their deferrals and ameliorating the causes wherever possible. Aim of the study : The aim of this study was to know the profile of donors who come for blood donation at a tertiary care hospital, Hyderabad and also the reasons for blood donation deferral among them. Materials & Methods : The study was conducted at tertiary care teaching hospital in Hyderabad. All those who attended for donation between 1st January 2013 and 31st December 2016 were included in the study. Results: Out of 75,167 donors, 70,173 donors have donated the blood and a total of 4994 (6.64%) donors were deferred. Out of 4,994 donors deferred, 4,670 (93.51%) were males and 324 (6.49%) were females; 4,804 (96.19) were replacement and 190 (3.81%) were voluntary donors respectively. Predominant age group deferred was in the range of 18-30 years. Temporary and permanent deferrals were 76.37% and 23.63% respectively. Most common reason for deferral was low haemoglobin (49.09%) followed by alcohol consumption (1.5%) and drug intake (1.47%). Conclusion: Most of the studies in literature indicate high percentage of donor deferrals due to temporary causes. These temporarily deferred donors can be treated and can be brought back into the donor program

RETROSPECTIVE ANALYSIS OF PACKED RED BLOOD CELL TRANSFUSION IN TERTIARY CARE HOSPITALIN SOUTHERN INDIA

Introduction: Packed Red cells (Packed RBC) forms an important element in the treatment of various medical conditions. RBC transfusions are generally done to treat hemorrhage and also to enhance oxygen delivery to tissues. Transfusion of RBCs should be based on the patient's clinical condition. Our present study was aimed at analyzing the appropriateness of usage of packed red blood cell usage in our tertiary care hospital. Materials and Methods: This present study was a retrospective analysis of 3000 packed red blood cells issue request forms over the period from august 2017 to October 2017 were analyzed. The appropriate use of packed RBC was assessed by AABB revised guidelines 2016. The transfusion was considered inappropriate if it does not follow these guidelines. Results: The maximum packed red blood cells were transfused in the department of nephrology no 918 units (19.58 %) followed by department of CT surgery no 793 units (16.91 %) and department of General Medicine no 710 units (15.14 %).Maximum number of packed red blood cells were utilized for elective surgeries i.e. 1323 units (28.2 %) followed by malignancies 1012 (21.6%). Commonest indication in electric surgeries is for Percutaneous Nephro Lithotomy, where as in malignancies commonest indication being the acute myeloid leukemia. Conclusion: The overall prevalence rate of appropriate usage of packed RBC in our hospital is 62.4%, which is quite lower and also we found out increasing number of single unit transfusions which could have been avoided with proper implementation of guidelines. These retrospective studies are useful to identify the critical areas requiring intervention so that inappropriate usage of blood and components can be minimized