Rio Bravo: A journal of borderlands (New Series) Spring 2003 v.1 no.2

What Does the Man See? Searching The Crossing for McCarthy\u27s Vision of Mexico / Bruce W. Coggin -- Materialism and the Function of Women in Cormac McCarthy\u27s Border Trilogy / Kelly Gerald -- Cormac McCarthy and the Literature of American Filibustery / Brady Harrison -- Cormac McCarthy\u27s Appropriation of Texas Literary Space in All the Pretty Horses / Don Graham -- Revisioning Cormac McCarthy\u27s Existentialism / David Holloway -- Borderline Nostalgia and Global Impact / John Beck -- McCarthy, War, and the Physics of Witness / John Wegner -- Chicano as Label: Factors Affecting Widespread Acceptance by Insiders and Outsiders / Anne Arundel Thaddeus -- The Educational and Occupational Aspirations and Expectations of Mexican American Children Living in Colonias / Jaime Chahin.https://scholarworks.utrgv.edu/riobravojournal/1010/thumbnail.jp

Durability of Structural Lumber Products at High Temperatures. Part I. 66°C at 75%RH and 82°C at 30%RH

Background. The effect of temperature on properties can be separated into reversible and permanent effects. The National Design Specification (NDS) provides factors (Ct) for reducing properties for reversible effects but provides little guidance on permanent effects.Objectives. The primary objective of this paper is to evaluate the effect of prolonged heating (permanent effect) on the flexural properties of solid-sawn and composite lumber products exposed at 66°C and 75% relative humidity (RH) and at 82°C and 30% RH. A second objective is to determine how to estimate total effects.Procedures. Solid-sawn lumber, laminated veneer lumber (LVL), and laminated strand lumber (LSL) were heated continuously for up to 6 years. After each exposure period, the lumber was conditioned to room temperature at the specified RH and then tested on edge in third-point bending. Some lumber was also tested hot at 66°C after 48 h of exposure and after 3 years of exposure.Results. After 3 years of continuous exposure at 66°C and 75% RH, solid-sawn Spruce-Pine-Fir (SPF) and Douglas-fir retained about 72% of their original modulus of rupture (MOR) and southern pine about 47%. For the first 2 to 3 years of exposure, changes in MOR of LVL were similar to that of solid-sawn SPF and Douglas-fir. After almost 6 years of exposure, SPF retained about 67% MOR and LVL 26% to 49%. The MOR of LSL was more sensitive to duration of exposure than was the MOR of either solid-sawn lumber or LVL, with a residual MOR of 47% after 28 months. After 21 months at 82°C and 30% RH, solid-sawn lumber retained 50% to 55% MOR, LVL 41%, and LSL 45%. For all products, modulus of elasticity was less sensitive to thermal degradation than was MOR.Conclusions. The effect of temperature on MOR of solid-sawn lumber is independent of grade. Composite lumber is more sensitive than solid-sawn to change in strength due to thermal degradation. The difference in MOR between species and product types may be less at low humidity levels than at high. The total effect of temperature on MOR can be estimated by adding the reversible plus the permanent effects. Available literature suggests that the wood used in attics of residential construction is not likely to experience significant accumulation of exposure at temperatures ≥66°C over the life of the structure

Invariant tensors and cellular categories

Let U be the quantised enveloping algebra associated to a Cartan matrix of finite type. Let W be the tensor product of a finite list of highest weight representations of U. Then the centraliser algebra of W has a basis called the dual canonical basis which gives an integral form. We show that this integral form is cellular by using results due to Lusztig.Comment: 6 pages; to appear in Journal of Algebr

Security of Tenure and Land Registration in Africa: Literature Review and Synthesis

In 1984, the Land Tenure Center embarked on a project to evaluate the experiences with land registration and tenure reform in Africa. The goal was to determine is African states been able to use tenure reform and land registration to provide greater security of tenure than was available through customary tenure systems. Donor agencies focused attention on the creation of individual freehold title, emphasizing the heightened security of holding, marketability, and access to credit under such tenure. National governments, on the other hand, were more concerned to see that land was used productively rather than merely accumulated for purposes of prestige or inheritance or as a hedge against inflation, and for this reason have tended to favor granting more circumscribed rights, such as leaseholds or rights of occupancy. This literature review and synthesis was prepared as part of an effort to increase very substantially our knowledge, especially on a quantitative level, of tenure and development relationships in Africa. The literature review is an attempt to gather in one place data about the diverse efforts at land registration and to describe briefly for each country the various registration programs that have taken place (if any), why they were undertaken, and what subsequent studies of these programs have found. Among other things, it will be seen that the intended benefits, and beneficiaries, of land registration have changed over the century or so since the first systems were put in place. In addition to these variations over time, there are also differences among Anglophone, Francophone, and Lusophone countries, differences that not only influenced the structure of registration systems established during the colonial era, but also continue to inform the kinds of registration systems adopted today.Land Economics/Use,

14C-Cobalamin Absorption from Endogenously Labeled Chicken Eggs Assessed in Humans Using Accelerator Mass Spectrometry.

Traditionally, the bioavailability of vitamin B-12 (B12) from in vivo labeled foods was determined by labeling the vitamin with radiocobalt (57Co, 58Co or 60Co). This required use of penetrating radioactivity and sometimes used higher doses of B12 than the physiological limit of B12 absorption. The aim of this study was to determine the bioavailability and absorbed B12 from chicken eggs endogenously labeled with 14C-B12 using accelerator mass spectrometry (AMS). 14C-B12 was injected intramuscularly into hens to produce eggs enriched in vivo with the 14C labeled vitamin. The eggs, which provided 1.4 to 2.6 μg of B12 (~1.1 kBq) per serving, were scrambled, cooked and fed to 10 human volunteers. Baseline and post-ingestion blood, urine and stool samples were collected over a one-week period and assessed for 14C-B12 content using AMS. Bioavailability ranged from 13.2 to 57.7% (mean 30.2 ± 16.4%). Difference among subjects was explained by dose of B12, with percent bioavailability from 2.6 μg only half that from 1.4 μg. The total amount of B12 absorbed was limited to 0.5-0.8 μg (mean 0.55 ± 0.19 μg B12) and was relatively unaffected by the amount consumed. The use of 14C-B12 offers the only currently available method for quantifying B12 absorption in humans, including food cobalamin absorption. An egg is confirmed as a good source of B12, supplying approximately 20% of the average adult daily requirement (RDA for adults = 2.4 μg/day)

Using an Adapted Tool to Transform Medical School Faculty Evaluation of Open Access Journals and Lead to Wider Campus Acceptance of Open Access Publishing

Objective: To share how an adaptation of the Association of American Medical Colleges (AAMC) Annotated bibliography of journals for educational scholarship is being transformed into a program to facilitate medical faculty assessment of open access (OA) journals, and is enabling librarians to lead open access evaluation for faculty on the main campus. Methods: A companion reference chart indicating MEDLINE indexing, journal impact quartile rankings, and open access and/or self-archiving policy was adapted from the Association of American Medical Colleges (AAMC) Annotated bibliography of journals for educational scholarship and made freely available in April 2017. This chart has been downloaded from the institutional repository over 800 times. Scholarly communications leadership saw this format as an opportunity to overcome “predatory journal” anxiety that many faculty face when considering open access journals for publication. A pilot project with a medical school research team was developed to identify and supply open access journal quality criteria for journals relevant to the team’s research and publishing goals. After an initial proof-of-concept demonstration to the lab director, criteria and subject areas were refined, and a new journal reference chart prepared. Faculty will have a tool for both subscription and open access journal selection that is not only relevant to their research area but also sends a positive message about the potential of OA publication. Results: Outreach efforts to labs, centers and departments are ongoing and impact is measured by changes in the number of applications to the institution’s fund to subsidize OA author fees. Main campus subject librarians have formed a working group to tailor the process and format for their client groups. Conclusion: While every discipline has unique norms of publication, all faculty want common assurance about the quality and impact likelihood of the venue in which they publish. Librarians can lead faculty to data-driven decision-making by adapting and consolidating existing tools into easy-to-use reference sheets and transforming the OA landscape from predatory to inviting

Using an Adapted Tool to Transform Medical School Faculty Evaluation of Open Access Journals and Lead to Wider Campus Acceptance of Open Access Publishing

Objective: To share how an adaptation of the Association of American Medical Colleges (AAMC) Annotated bibliography of journals for educational scholarship is being transformed into a program to facilitate medical faculty assessment of open access (OA) journals, and is enabling librarians to lead open access evaluation for faculty on the main campus. Methods: A companion reference chart indicating MEDLINE indexing, journal impact quartile rankings, and open access and/or self-archiving policy was adapted from the Association of American Medical Colleges (AAMC) Annotated bibliography of journals for educational scholarship and made freely available in April 2017. This chart has been downloaded from the institutional repository over 800 times. Scholarly communications leadership saw this format as an opportunity to overcome “predatory journal” anxiety that many faculty face when considering open access journals for publication. A pilot project with a medical school research team was developed to identify and supply open access journal quality criteria for journals relevant to the team’s research and publishing goals. After an initial proof-of-concept demonstration to the lab director, criteria and subject areas were refined, and a new journal reference chart prepared. Faculty will have a tool for both subscription and open access journal selection that is not only relevant to their research area but also sends a positive message about the potential of OA publication. Results: Outreach efforts to labs, centers and departments are ongoing and impact is measured by changes in the number of applications to the institution’s fund to subsidize OA author fees. Main campus subject librarians have formed a working group to tailor the process and format for their client groups. Conclusion: While every discipline has unique norms of publication, all faculty want common assurance about the quality and impact likelihood of the venue in which they publish. Librarians can lead faculty to data-driven decision-making by adapting and consolidating existing tools into easy-to-use reference sheets and transforming the OA landscape from predatory to inviting

Power Spectra in V-band and Halpha of Nine Irregular Galaxies

Fourier transform power spectra of major axis cuts in V and Halpha images were made for a sample of 9 irregular galaxies. These power spectra reveal structure over a wide range of scales. For 6 of the galaxies the power spectrum slopes at intermediate scales (1-400 pc) in the V-band images range from -1.3 to -1.5. The similarity of slopes suggests that the same processes are structuring these systems. These slopes are slightly shallower than what is observed in other galaxies in HI, molecular emission, dust extinction, and optical light. Three of the galaxies have flat power spectra like noise from the sky; these three galaxies are relatively indistinct in the direct images. The power spectrum slope for Halpha steepens with increasing star formation rate, ranging from a shallow value comparable to the noise at low rates to a steep value with a slope of -1.5 at high rates. This change reflects the increasing areal filling factor of Halpha emission with increasing star formation rate, and an apparently universal slope inside the Halpha regions that is comparable to that for Kolmogorov turbulence. The power spectrum of HI in one galaxy has a steeper power law, with a slope of -2.9. The fact that the power laws of star formation are about the same for dwarf galaxies and giant spiral galaxies suggests the microscopic processes are the same, independent of spiral density waves and galaxy size.Comment: To be published in AJ, May 200