Dark matter from SUGRA GUTs: mSUGRA, NUSUGRA and Yukawa-unified SUGRA

Gravity-mediated SUSY breaking models with R-parity conservation give rise to dark matter in the universe. I review neutralino dark matter in the minimal supergravity model (mSUGRA), models with non-universal soft SUSY breaking terms (NUSUGRA) which yield a well-tempered neutralino, and models with unified Yukawa couplings at the GUT scale (as may occur in an SO(10) SUSY GUT theory). These latter models have difficulty accommodating neutralino dark matter, but work very well if the dark matter particles are axions and axinos.Comment: to be published in Proceedings of 8th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Univers

Another Nibble at the Core: Student Learning in a Thematically-focused Introductory Sociology Course

Identifying and assessing core knowledge has been and continues to be a challenge that vexes the discipline of sociology. With the adoption of a thematic approach to courses in the core curriculum at Butler University, faculty teaching Introductory Sociology were presented with the opportunity and challenge of defining the core knowledge and skills to be taught across course sections with a variety of themes. This study of students (N = 280) enrolled in 12 sections of a thematically-focused Introductory Sociology course presents our attempt to both define and assess a core set of concepts and skills through a pretest-posttest questionnaire to measure student learning gains relative to: (1) a sociological perspective, (2) sociological theory, (3) research methods, and (4) key concepts in sociology. Results show significant learning gains on all four dimensions, with the greatest gains coming in sociological theory. There were no significant differences in pretest scores by gender or by whether students had taken a sociology course in high school. Seniors scored significantly higher on both the pretest and the posttest, but after we controlled for pretest scores seniors did significantly better only on the subset of questions related to sociological theory. Students who took a sociology course in high school scored lower on the methods subscale of the posttest and had lower overall total posttest scores than their counterparts

Breaking Out of the Box: Transforming Archival Collections and Workflows through Collaborative Description Projects

Archivists and archival collections can often be siloed into the “special” corner of their parent library: under described, underutilized, and often even unknown. Finding a path out of isolation may require taking a new look at collection management needs and considering new partners in the work. Collaboration with colleagues can result in positive ripple effects that extend beyond the initial project goals. This session will highlight three innovative description projects where archivists partnered with non-archivists to improve access to targeted collections and will detail how their collaborations transformed their archival collections, work structures and relationships, and, ultimately, their users. After the three presentations, the session audience will have the opportunity to brainstorm with the presenters and with each other about where their opportunities for collaboration and transformation lie. What underutilized collections in your repository are just waiting for that perfect combination of excitement and expertise to blossom into wonderful research resources? Which person down the hall from you, in the next cubicle, or in a separate building could be your next transformation partner

Creating a Foundation for the Causal Relationship Between Libraries and Learning: A Proposed Application of Nursing and Public Health Research Methods

Thomas Cook, a renowned causal research expert and professor of sociology, psychology, education, and social policy at Northwestern University (USA), called for school library researchers to parallel causality determination efforts in health-related fields. In this paper, we respond to Dr. Cook’s challenge with a proposed research design centered on Mixed Research Synthesis (MRS) as part of process validated by the U.S. Department of Education and National Science Foundation’s Common Guidelines for Education Research and Development. MRS studies, often used in nursing and public health research to develop causal theories, enable researchers to develop evidence summaries; identify and adjudicate rival and companion theories, and determine the active ingredients and weak links in the implementation chain of interventions, programs, and policies. MRS is the essential first step in a possible ongoing multi-phased research agenda designed to progress from theory building to theory testing to causal determination. In addition to building on and extending school librarianship’s heritage in replicated correlational research and strong affective value, the researchers’ proposed MRS implementation will test the usefulness of a technique that has never been used in school settings and will provide a useful entry point for researchers concerned with other types of libraries

A Study of the Scintillation Induced by Alpha Particles and Gamma Rays in Liquid Xenon in an Electric Field

Scintillation produced in liquid xenon by alpha particles and gamma rays has been studied as a function of applied electric field. For back scattered gamma rays with energy of about 200 keV, the number of scintillation photons was found to decrease by 64+/-2% with increasing field strength. Consequently, the pulse shape discrimination power between alpha particles and gamma rays is found to reduce with increasing field, but remaining non-zero at higher fields.Comment: 15 pages, 12 figures, accepted by Nuclear Instruments and Methods in Physics Research

Weekly paclitaxel, gemcitabine, and external irradiation followed by randomized farnesyl transferase inhibitor R115777 for locally advanced pancreatic cancer.

PURPOSE: The Radiation Therapy Oncology Group (RTOG) multi-institutional Phase II study 98-12, evaluating paclitaxel and concurrent radiation (RT) for locally advanced pancreatic cancer, demonstrated a median survival of 11.3 months and a 1-year survival of 43%. The purpose of the randomized Phase II study by RTOG 0020 was to evaluate the addition of weekly low- dose gemcitabine with concurrent paclitaxel/RT and to evaluate the efficacy and safety of the farnesyl transferase inhibitor R115777 following chemoradiation. PATIENTS AND METHODS: Patients with unresectable, nonmetastatic adenocarcinoma of the pancreas were eligible. Patients in Arm 1 received gemcitabine, 75 mg/m(2)/week, and paclitaxel, 40 mg/m(2)/week, for 6 weeks, with 50.4 Gy radiation (CXRT). Patients in Arm 2 received an identical chemoradiation regimen but then received maintenance R115777, 300 mg twice a day for 21 days every 28 days (CXRT+R115777), until disease progression or unacceptable toxicity. RESULTS: One hundred ninety-five patients were entered into this study, and 184 were analyzable. Grade 4 nonhematologic toxicities occurred in less than 5% of CXRT patients. The most common grade 3/4 toxicity from R115777 was myelosuppression; however, grade 3/4 hepatic, metabolic, musculoskeletal, and neurologic toxicities were also reported. The median survival time was 11.5 months and 8.9 months for the CXRT and CXRT+R115777 arms, respectively. CONCLUSIONS: The CXRT arm achieved a median survival of almost 1-year, supporting chemoradiation as an important therapeutic modality for locally advanced pancreatic cancer. Maintenance R115777 is not effective and is associated with a broad range of toxicities. These findings provide clinical evidence that inhibition of farnesylation affects many metabolic pathways, underscoring the challenge of developing an effective K-ras inhibitor

Implications of Compressed Supersymmetry for Collider and Dark Matter Searches

Martin has proposed a scenario dubbed ``compressed supersymmetry'' (SUSY) where the MSSM is the effective field theory between energy scales M_{\rm weak} and M_{\rm GUT}, but with the GUT scale SU(3) gaugino mass M_3<< M_1 or M_2. As a result, squark and gluino masses are suppressed relative to slepton, chargino and neutralino masses, leading to a compressed sparticle mass spectrum, and where the dark matter relic density in the early universe may be dominantly governed by neutralino annihilation into ttbar pairs via exchange of a light top squark. We explore the dark matter and collider signals expected from compressed SUSY for two distinct model lines with differing assumptions about GUT scale gaugino mass parameters. For dark matter signals, the compressed squark spectrum leads to an enhancement in direct detection rates compared to models with unified gaugino masses. Meanwhile, neutralino halo annihilation rates to gamma rays and anti-matter are also enhanced relative to related scenarios with unified gaugino masses but, depending on the halo dark matter distribution, may yet be below the sensitivity of indirect searches underway. In the case of collider signals, we compare the rates for the potentially dominant decay modes of the stop_1 which may be expected to be produced in cascade decay chains at the LHC: \tst_1\to c\tz_1 and \tst_1\to bW\tz_1. We examine the extent to which multilepton signal rates are reduced when the two-body decay mode dominates. For the model lines that we examine here, the multi-lepton signals, though reduced, still remain observable at the LHC.Comment: 22 pages including 24 eps figure

Limits on spin-dependent WIMP-nucleon cross-sections from the first ZEPLIN-II data

The first underground data run of the ZEPLIN-II experiment has set a limit on the nuclear recoil rate in the two-phase xenon detector for direct dark matter searches. In this paper the results from this run are converted into the limits on spin-dependent WIMP-proton and WIMP-neutron cross-sections. The minimum of the curve for WIMP-neutron cross-section corresponds to 0.07 pb at a WIMP mass of around 65 GeV.Comment: 12 pages, 2 figures, to be published in Physics Letters

1971: Abilene Christian College Bible Lectures - Full Text

WORLD EVANGELISM Being the Abilene Christian College Annual Bible Lectures 1971 Published by ABILENE CHRISTIAN COLLEGE BOOK STORE ACC Station Abilene, Texas 7960

Can we control brush by helicopter spraying before timber harvest?

Aerial application of fosamine ammonium or glyphosate at moderate rates was not adequate for controlling understory brush before final harvesting of mature Douglas-fir (Pseudotsuga menziesii) stands or for reducing vigor of post-harvest sprouting. Symptoms of herbicide injury were those associated with low application rates, suggesting that the canopy intercepted too much of the chemicals for adequate brush treatment. Site-preparation effects of logging were more pronounced than those of herbicide treatment in curbing future dominance by brush. Shrub species composition did not change as a result of spraying, logging, or both. Controlling understory brush with herbicides before harvest may require aerial application at higher rates or use of ground equipment where coniferous overstories are dense