Specific wavelength colorimeter

A self contained, specific wavelength, single beam colorimeter is described for direct spectrophotometric measurement of the concentration of a given solute in a test sample. An electrical circuit employing a photoconductive cell converts the optical output into a linear, directly readable meter output. The colorimeter is simple to operate and is adapted for use in zero gravity conditions. In a specific application, the colorimeter is designed to analyze the concentration of iodine in potable water carried aboard a space vehicle such as the 4B stage of Skylab

Facilities Redesign of Stockroom at Elcon Precision

Elcon Precision is a company based out of San Jose, California specializing in the photochemical processing of materials and brazing of metals and ceramics for a variety of different industries. Three students from the Industrial Engineering Department at California Polytechnic State University, San Luis Obispo were contacted by Elcon Precision to help redesign their stockroom and inventory areas in their San Jose location in order to allow for the future growth of the company. Elcon asked the Cal Poly project team to help increase efficiencies throughout the stockroom by creating an alternative layout that best suited the company\u27s needs. This report will provide an in depth analysis of the Cal Poly project team\u27s approach to achieve a more efficient layout for the Elcon Precision stockroom

Selection of Corymbia citriodora for pulp productivity

Evaluation of a series of spotted gum (Corymbia citirodora) progeny trials, established in the subtropical region of Queensland, Australia, was undertaken to provide information for the development of advanced-generation breeding populations suitable for pulp production. Measurements of growth at two ages were combined with assessments of wood density and pulp yield from a selected sample of provenances to provide comparisons between provenances, to generate genetic parameter estimates and to predict genetic gain potential. Although growth at this age was moderate relative to other eucalypts, the near-infrared predictions of average wood density of 756 kg m-3 and pulp yield of 55% indicate the species has considerable potential as a pulpwood crop. A pulp productivity breeding objective was used to identify production populations using a range of selection trait weightings to determine potential genetic gain for pulp productivity. Genetic parameters indicated (1) levels of genetic control were moderate for all traits and higher for wood property traits, (2) genetic improvements could be achieved by selection among and within provenances with greater levels of improvement available from selection within populations, (3) genotype by environment interactions were negligible, (4) genetic correlations between traits were favourable, and (5) selection of volume production alone would maximise improvements in pulp productivity

Exploring Military Veteran Students’ Pathways in Engineering Education

Military Veteran Students’ Pathways in Engineering Education (Year 1: Award# 1428646)Military veterans hold tremendous promise for expanding and diversifying the engineeringworkforce. Given the diverse backgrounds of veterans, their increasing numbers, and thegrowing national demand for engineering professionals, the timing is ideal to study theconditions under which student veterans pursue engineering education and the factors that offerthem the greatest support for success. Increasing the participation of veterans in engineeringoffers the possibility of enhancing engineering’s diversity in many needed dimensions since,compared to civilian students, veterans are more likely to be older, first-generation collegestudents, disabled, African American, or Latino. Yet, little is known regarding the educationalpathways and experiences of student veterans into engineering. This project therefore aims toaddress gaps in the literature on student veterans in engineering through a comparative casestudy across four institutions: University of San Diego, North Carolina State University, PurdueUniversity, and Clemson University. The following research questions are addressed:1. Why do veterans pursue a Bachelor’s degree in engineering?2. How do military experiences shape student veterans’ educational experiences?3. What are the experiences of student veterans in engineering education?4. How do institutions support veterans in engineering education?The research plan incorporates content analysis of academic policies that student veteransencounter, interviews with key informants on each campus, focus group interviews with studentveterans, and in-depth student interviews to elicit rich narratives. The theoretical frameworkbuilds on Tinto’s student integration model and Schlossberg’s adult transition theory. Data willbe analyzed with the lens of intersectionality to elucidate differences stemming from theintersection of military status with race, gender, ability, sexual orientation, and socioeconomicstatus. Findings will provide context and information for various applications, such as:development of new strategies to support student veterans\u27 success, identification of overlookedareas to promote student veterans\u27 participation in engineering, and generation of criticalinformation for development of larger-scale studies for investigating student veterans inengineering. Thus, this study has potential for broad systemic impact by diversifying pathways toand through engineering programs, and in capitalizing on the informal and real-worldexperiences of engineering student veterans

Characterizing and Modeling the Experience of Transfer Students in Engineering—Progress on NSF Award 0969474

Characterizing and Modeling the Experience of Transfer Students in Engineering— Progress on NSF Award 0969474Quantitative analysis of MIDFIELD databaseOur analysis used records for 94,732 undergraduate students from the Multiple-InstitutionDatabase for Investigating Engineering Longitudinal Development (MIDFIELD). MIDFIELDcomprises a census of undergraduate students who attended 11 public institutions between 1988and 2008. MIDFIELD institutions represent public universities that educate large numbers ofengineering students.From the 977,950 records available, we restricted our sample to those who (1) were domesticstudents (927,350), (2) were in the data set early enough for us to observe the possibility ofgraduation within six years (677,691), and (3) declared a major in engineering or otherwiseexpressed the intent to study engineering in the fifth semester of their programs (94,732). Fortransfer students, we estimated placement using transfer hours, assuming that 15 credit hoursequals one semester; we also used the fifth semester as the reference point to capture mosttransfer students at the point of matriculation to ensure a valid comparison of transfers to non-transfers. This approach resulted in a sample of 21,542 transfer and 73,190 non-transferengineering students included in this analysis.Semi-structured interviewsCampus representatives at two MIDFIELD institutions sent an invitation to all engineeringstudents who had transferred into the institution in the two semesters preceding the semester ofthe interview. Interested students completed a survey to provide demographic and schedulinginformation. Participants were chosen from six engineering majors - civil, chemical, computer,electrical, industrial, and mechanical - and were diverse with respect to gender and ethnicity.Selected students were interviewed in Fall 2011 and in Spring 2012.We used a semi-structured interview protocol to learn more about student experiences with thetransfer process. We used a constant comparative coding method, whereby emerging conceptswere constantly compared to data that had already been coded.Overview of Progress Identifying and Describing the Entry Points into Engineering Transfer Pathways: A preliminary study relied on 52 of the 86 students who were interviewed across five campuses to understand their reasons for choosing engineering as a field of studies and the transfer pathway to enter the field. Studying the Motivations and Experiences of Older Transfer Students in Engineering: Of the 86 students who were interviewed on the five campuses, the 15 students who were 25 years of age or older at the time of the interview were selected for this study. Studying the Performance of Black transfer students: based on a logistic regression model refined to include transfer pathway (2-year vs. 4-year), we learned that: Studying the Mean Grade Differential by Course Discipline: For engineering transfer and first-time-in-college (FTIC) students, we computed average grades in STEM courses by discipline, and by institution

Multilevel drivers of human immunodeficiency virus/acquired immune deficiency syndrome among black Philadelphians: Exploration using community ethnography and geographic information systems

Background: Unequal human immunodeficiency virus (HIV)/acquired immune deficiency syndrome (AIDS) distribution is influenced by certain social and structural contexts that facilitate HIV transmission and concentrate HIV in disease epicenters. Thus, one of the first steps in designing effective community-level HIV/AIDS initiatives is to disentangle the influence of individual, social, and structural factors on HIV risk. Combining ethnographic methodology with geographic information systems mapping can allow for a complex exploration of multilevel factors within communities that facilitate HIV transmission in highly affected areas. Objectives: We present the formative comparative community-based case study findings of an investigation of individual-, social-, and structural-level factors that contribute to the HIV/AIDS epidemic among Black Philadelphians. Methods: Communities were defined using census tracts. The methodology included ethnographic and geographic information systems mapping, observation, informal conversations with residents and business owners, and secondary analyses of census tract-level data in four Philadelphia neighborhoods. Results: Factors such as overcrowding, disadvantage, permeability in community boundaries, and availability and accessibility of health-related resources varied significantly. Furthermore, HIV/AIDS trended with social and structural inequities above and beyond the community's racial composition. Discussion: This study was a first step to disentangle relationships between community-level factors and potential risk for HIV in an HIV epicenter. The findings also highlight stark sociodemographic differences within and across racial groups and further substantiate the need for comprehensive, community-level HIV prevention interventions. These findings from targeted U.S. urban communities have potential applicability for examining the distribution of HIV/AIDS in broader national and international geosocial contexts