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San Diego, CA, United States

Angione R.J.,San Diego State University | Sievers J.R.,San Diego Mesa College
Publications of the Astronomical Society of the Pacific | Year: 2013

We present the first simultaneous four color Strömgren photometric and spectroscopic orbit solution of EG Cephei (V = 9:44, P = 0:545 days). Modeling was done using both theWilson-Devinney and Eclipsing Light Curve (ELC) programs. This system is known to have a variable period; however, we found no spectroscopic evidence of active mass transfer. Our spectroscopic orbit of the primary component yielded a semi-amplitude of K1 = 111 km s-1. A spectral classification of A6 for the primary was determined from the Ca II K-line. Our model solutions suggest EG Cephei is a near-contact system complicated by star spots. We determined the masses and radii, in solar units, to be M1 = 1:59, M2 = 0:75, R1 = 1:62, and R2 = 1:17, and the temperatures to be T1 = 8000 K and T2 = 5441 K. © 2013. The Astronomical Society of the Pacific. All rights reserved.

Baer R.D.,University of South Florida | Arteaga E.,Federacion de Organizaciones Campesinas | Dyer K.,University of South Florida | Eden A.,University of South Florida | And 5 more authors.
Ethnicity and Health | Year: 2013

Objectives. This study adds to the discussion of appropriate categories of analysis in health research. We contribute data based on actual interviews about the concepts of race and ethnicity, conducted among a broad range of US health researchers. Design. In-person qualitative interviews were conducted with 73 scientists at two health research institutions, one that focused on public health research, and one that focused on research about a specific disease. This represents a larger and more interdisciplinary sample of health researchers than has been previously interviewed about these topics. Results. We identify a core model of how race and ethnicity are understood. The respondents were confused about the concepts of race and ethnicity and their link to genetic differences between populations; many treated these concepts as interchangeable and genetically based. Although ethnicity was considered somewhat more socially constructed, it was often felt to cause unhealthy behavior. In addition, the situation is not improving; the younger health researchers tended to put a stronger emphasis on the genetic aspects of race than did the older health researchers. Conclusion. Unlike reviews of how these concepts are used in scientific publications in which race and ethnicity are often undefined, our face-to-face interviews with these researchers allowed an understanding of their concepts of race and ethnicity. Building on their actual perspectives, these data suggest alternative approaches to formal and continuing educational training for health researchers. We recommend beginning with discussions of human diversity, and then moving on to what race and ethnicity are - and are not. © 2013 Copyright Taylor and Francis Group, LLC.

Truong L.,University of California at San Diego | Tat J.,Scripps Research Institute | Tat J.,University of California at San Diego | Booy M.,Northeast Ohio Medical University | And 9 more authors.
Journal of Cancer Education | Year: 2016

Operating since 1994, the UCSD Moores Cancer Center’s Asian Grocery Store-Based Cancer Education Program (the Program) is a proven and sustainable strategy for disseminating cancer and poison control information to Asian and Pacific Islander (API) communities. This paper describes the process taken to identify health topics that can be readily addressed within the Program’s infrastructure and reports results of the pilot testing of the educational module that was developed by following that process. The development of each new module is guided by the Health Belief Model and the Tipping Point Model. The process starts with the selection of a health topic demonstrating pressing need and treatment options in the API community. Then, using the Pareto principle, reasonably modifiable risk factors are chosen to be addressed in the module. “Sticky messaging” for the modifiable risk factors is developed to package the health information as memorable and transmissible calls-to-action. Finally, grocery store outreaches were used to pilot test the new module to assess its effectiveness at facilitating health care information to API community members. By adhering to the steps described in this paper, the authors were able to: (1) select liver cancer as a pressing API health issue that could be positively impacted by the Program; (2) identify reasonably modifiable risk factors for the chosen health issue; (3) generate compelling call-to-action messages to decrease risk of exposure; and (4) demonstrate the cultural and linguistic alignment of the liver cancer control module. The development and testing of new health education modules follow a methodical process guided by scientific principles. Understanding and employing the elements of an existing evidence-based and sustainable health education program can increase the likelihood of success in addressing the health needs of the API community. © 2015, American Association for Cancer Education.

Wong S.K.,General Atomics | Wong S.K.,San Diego Mesa College | Chan V.S.,General Atomics
Plasma Physics and Controlled Fusion | Year: 2011

A numerical method for solving the linearized drift kinetic equation for an axisymmetric magnetic field with the Fokker-Planck operator for Coulomb collisions is presented. It is applied to calculate the ion thermal conductivity and parallel flow for concentric circular flux surfaces. Comparisons are made with existing calculations that use model collision operators. Analytic theory in the banana regime is shown to differ significantly from numerical calculations for flux surface aspect ratios and plasma collisionality of practical interests. © 2011 IOP Publishing Ltd.

Abdelmelek S.B.,University of Bizerte | Saidane S.,University of Bizerte | Saidane S.,San Diego Mesa College | Trabelsi M.,University of Bizerte
Algorithms | Year: 2010

In this paper, we apply various data mining techniques including continuous numeric and discrete classification prediction models of base oils biodegradability, with emphasis on improving prediction accuracy. The results show that highly biodegradable oils can be better predicted through numeric models. In contrast, classification models did not uncover a similar dichotomy. With the exception of Memory Based Reasoning and Decision Trees, tested classification techniques achieved high classification prediction. However, the technique of Decision Trees helped uncover the most significant predictors. A simple classification rule derived based on this predictor resulted in good classification accuracy. The application of this rule enables efficient classification of base oils into either low or high biodegradability classes with high accuracy. For the latter, a higher precision biodegradability prediction can be obtained using continuous modeling techniques. © 2010 by the authors.

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