Vulnerability, Risk, and the Transition to Adulthood

Examines whether poverty and single parenthood influence the likelihood of risk behavior and dropping out among youth and how these behaviors affect the trajectory of connectedness and employment patterns in adulthood. Considers policy implications

SPATIAL ECOLOGY AND HABITAT USE OF THE WESTERN MASSASAUGA (SISTRURUS TERGEMINUS) IN NEBRASKA

We used radiotelemetry during 2004 and 2005 to investigate seasonal movements and habitat use and to improve our understanding of how land management practices were affecting Western Massasauga (Sistrurus tergeminus) populations in Nebraska. We found Western Massasaugas to brumate in crayfish burrows 100% of the time, and spring emergence occurred during March - April. The longest movements occurred during May when snakes were moving away from brumation sites to summer habitat, after which movements decreased until a second peak in August. We did not find significant differences between male and female activity area, range length, total distance moved, daily movement, or distance from spring and fall brumation sites. However the core activity range of females was significantly less than that of males. During the active season, grassland habitat was used 75.6% of the time compared to habitats of grassland-shrubs (10.7%), hydrophilic vegetation (9.1%), woodlands (3.1%), and shrublands (1.5%). Identifying variations in a species spatial ecology is important for achieving long-term conservation goals because life history events, resource availability, and land management practices may have an effect on seasonal movements and habitat use. The results of our study demonstrate the need for, and some of the necessary data for, improved land management planning in order to meet conservation needs of the Western Massasauga in Nebraska

Assessing Digital Humanities Tools: Use of Scalar at a Research University

As librarians increasingly support digital publication platforms, they must also understand the user experience of these tools. This case study assesses use of Scalar, a digital humanities publishing platform for media-rich projects, at the University of Illinois at Urbana–Champaign. Based on a survey, interviews, and content analysis, the study highlights the platform’s usability, its functionality, and its successes and failures in meeting user expectations. The media upload process, image annotation, and aesthetics factored into user issues. Writing pedagogy also emerged as an important consideration. Results suggest lessons for digital literacy instruction, as well as how and when Scalar might serve patrons’ publishing needs.Ope

Educational Technology Integration and High-Stakes Testing

Determining if the investment in educational technology will improve student achievement is complicated and multifarious. The purpose of this study was to evaluate the influence of teacher technology integration on student achievement as measured by the Mississippi Subject Area Testing Program (SATP) and to explore the relationship between technology integration and other factors (a teacher’s age, gender, computer self-efficacy, and technology training). This non-experimental, quantitative study included 106 secondary school teachers from six school districts in Mississippi. The respondents completed a questionnaire based on their SATP course (Algebra I, Biology, English II, and U. S. History) teaching experiences. This study employed a multiple linear regression statistical test. The findings of this study indicated that there was a statistically significant relationship between technology integration and a teacher’s age, gender, computer self-efficacy, technology training, and student test scores (collectively). The study also showed that when controlling for all other variables, computer self-efficacy and technology integration was statistically significant while age, gender, and student test scores were not statistically significant

A Flexible Joint Longitudinal-Survival Model for Analysis of End-Stage Renal Disease Data

We propose a flexible joint longitudinal-survival framework to examine the association between longitudinally collected biomarkers and a time-to-event endpoint. More specifically, we use our method for analyzing the survival outcome of end-stage renal disease patients with time-varying serum albumin measurements. Our proposed method is robust to common parametric assumptions in that it avoids explicit distributional assumptions on longitudinal measures and allows for subject-specific baseline hazard in the survival component. Fully joint estimation is performed to account for the uncertainty in the estimated longitudinal biomarkers included in the survival model

Vacuum ultraviolet modification of polymers

Helium and argon arc plasmas rotating in a magnetic field were used as a source of vacuum-ultraviolet radiation (VUV) for modifying polymer surfaces. Surface modification was examined for treated samples of poly (tetraf luoroethylene) (PTFE), fluorinated ethylenepropylene copolymer (FEP), polyimide (PI) and poly ether ether ketone (PEEK) . Weight loss and contact angle experiments were carried out for polymers exposed to arcs of various parameters and exposure times. Additional experiments were carried out using various UV filters positioned against the exposed polymer surface to determine the photon energies necessary to induce polymer modification

Value Drivers in Business Course Design: A Student Stakeholder Perspective

As one of the important stakeholders in the academic process, students and their preferences should be considered when the instructor selects the various course design features. Although students are not the only stakeholders in the academic process, their receptiveness to classroom instruction is clearly a central focus of that process. This paper examines a large sample of business student data on their preferences with respect to fourteen controllable course design features. The preferences are examined in light of their relative ranked importance and relative intensity. Additionally, the data is examined in light of potential differences in student preferences relative to various demographics. The paper summarizes the ranked contributions of different course design features from a student perspective. These findings should assist instructors in designing course parameters to meet student considerations without compromising an instructor’s personal choice and academic freedom

The Long Wavelength Array Software Library

The Long Wavelength Array Software Library (LSL) is a Python module that provides a collection of utilities to analyze and export data collected at the first station of the Long Wavelength Array, LWA1. Due to the nature of the data format and large-N ($\gtrsim$100 inputs) challenges faced by the LWA, currently available software packages are not suited to process the data. Using tools provided by LSL, observers can read in the raw LWA1 data, synthesize a filter bank, and apply incoherent de-dispersion to the data. The extensible nature of LSL also makes it an ideal tool for building data analysis pipelines and applying the methods to other low frequency arrays.Comment: accepted to the Journal of Astronomical Instrumentation; 24 pages, 4 figure