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(N, 2N) Cross Section Measurements in Praseodymium-141 as a Function of Neutron Bombarding Energy

(N, 2N) Cross Section Measurements in Praseodymium-141 as a Function of Neutron Bombarding Energy

Date: May 1971
Creator: Marsh, Stephen Addison
Description: Using the parallel disk method of activation analysis, the (n,2n) reaction cross section in 141-Pr was measured as a function of neutron energy in the range 15.4 to 18.4 MeV. The bombarding neutrons were produced from the 3-T(d,n)4-He reaction, where the deuterons were accelerated by the 3-MV Van de Graff generator of the North Texas Regional Physics Laboratory in Denton, Texas.
Contributing Partner: UNT Libraries
2nd High-Level Meeting on Health and Environment in ASEAN and East Asian Countries

2nd High-Level Meeting on Health and Environment in ASEAN and East Asian Countries

Date: October 2010
Creator: unknown
Description: The Second High-Level Meeting on Environment and Health in ASEAN and East Asian countries was held in Bangkok, Thailand during 12-13 December 2005. The meeting follows a continuation of the process, which began in Manila in November 2004, where a regional initiative on environment and health was launched by ADB, WHO, and UNEP. It was attended by Representatives from Government and International Agencies and Institutions. The List of Participants is attached as Annexure 2
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3D Reconstruction Using Lidar and Visual Images

3D Reconstruction Using Lidar and Visual Images

Date: December 2012
Creator: Duraisamy, Prakash
Description: In this research, multi-perspective image registration using LiDAR and visual images was considered. 2D-3D image registration is a difficult task because it requires the extraction of different semantic features from each modality. This problem is solved in three parts. The first step involves detection and extraction of common features from each of the data sets. The second step consists of associating the common features between two different modalities. Traditional methods use lines or orthogonal corners as common features. The third step consists of building the projection matrix. Many existing methods use global positing system (GPS) or inertial navigation system (INS) for an initial estimate of the camera pose. However, the approach discussed herein does not use GPS, INS, or any such devices for initial estimate; hence the model can be used in places like the lunar surface or Mars where GPS or INS are not available. A variation of the method is also described, which does not require strong features from both images but rather uses intensity gradients in the image. This can be useful when one image does not have strong features (such as lines) or there are too many extraneous features.
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3rd African Drought Adaptation Forum report, Addis Ababa, Ethiopia, 17-19 September 2008

3rd African Drought Adaptation Forum report, Addis Ababa, Ethiopia, 17-19 September 2008

Date: September 2008
Creator: UNDP Drylands Development Centre; United Nations Office for Disaster Risk Reduction & Economic Commission for Africa
Description: The Third African Drought Adaptation Forum was held in September 2008 in Addis Ababa, Ethiopia. The Forum was organized so that participants could exchange practical experiences, findings and ideas on how to adapt to the increasing threat of drought and climate change in the drylands of Africa. The report contains a summary of sessions and outlines key themes that emerged from the discussions.
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D. A. Kolb’s Theory of Experiential Learning: Implications for the Development of Music Theory Instructional Material

D. A. Kolb’s Theory of Experiential Learning: Implications for the Development of Music Theory Instructional Material

Date: August 2001
Creator: Lively, Michael
Description: This research project evaluates the effectiveness of specific music theory instructional strategies in terms of D. A. Kolb’s theory of experiential learning and Kolb’s typology of individual learning style. The project provides an original methodology for the adaptation of music theory instructional material to the individual learning style types described in Kolb’s typology. The study compares the relative effectiveness of two music theory instructional sequences, one of which is adapted for all of the learning style modalities described in Kolb’s typology, and the other adapted for only a limited number of Kolb’s learning style types. In order to compare the potential “learning outcomes” produced by these instructional sequences, a detailed study is proposed, in which computer based instruction (CBI) will deliver the instructional sequences to research participants and electronically record the participants’ responses. The current study demonstrates the effective aspects of the original methodology and suggests methods for the successful adaptation of music theory instructional material to individual student learning styles.
Contributing Partner: UNT Libraries
AB 32 Fact Sheet - California Global Warming Solutions Act of 2006

AB 32 Fact Sheet - California Global Warming Solutions Act of 2006

Date: October 2006
Creator: California Air Resources Board
Description: Establishes first-in-the-world comprehensive program of regulatory and market mechanisms to achieve real, quantifiable, cost-effective reductions of greenhouse gases (GHG).
Contributing Partner: UNT Libraries
Ability Estimation Under Different Item Parameterization and Scoring Models

Ability Estimation Under Different Item Parameterization and Scoring Models

Date: May 2002
Creator: Si, Ching-Fung B.
Description: A Monte Carlo simulation study investigated the effect of scoring format, item parameterization, threshold configuration, and prior ability distribution on the accuracy of ability estimation given various IRT models. Item response data on 30 items from 1,000 examinees was simulated using known item parameters and ability estimates. The item response data sets were submitted to seven dichotomous or polytomous IRT models with different item parameterization to estimate examinee ability. The accuracy of the ability estimation for a given IRT model was assessed by the recovery rate and the root mean square errors. The results indicated that polytomous models produced more accurate ability estimates than the dichotomous models, under all combinations of research conditions, as indicated by higher recovery rates and lower root mean square errors. For the item parameterization models, the one-parameter model out-performed the two-parameter and three-parameter models under all research conditions. Among the polytomous models, the partial credit model had more accurate ability estimation than the other three polytomous models. The nominal categories model performed better than the general partial credit model and the multiple-choice model with the multiple-choice model the least accurate. The results further indicated that certain prior ability distributions had an effect on the accuracy ...
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Ability Grouping in Secondary English

Ability Grouping in Secondary English

Date: August 1952
Creator: Harris, Steva Whitehead
Description: This thesis discusses the pros and cons of grouping by ability in secondary English.
Contributing Partner: UNT Libraries
Abrupt Climate Change: Final Report

Abrupt Climate Change: Final Report

Date: 2008-[12]
Creator: US Climate Change Science Program and the Subcommittee on Global Change Research
Description: This document is part of the Synthesis and Assessment Products (SAP) described in the U.S. Climate Change Science Program (CCSP) Strategic Plan. This report is meant to reduce uncertainty in projections of how the Earth's climate and related systems may change in the future. It provides scientific information for supporting the decision-making audience and the expert scientific and stakeholder community.
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Absolute Beta Counting Using Thick Sources

Absolute Beta Counting Using Thick Sources

Date: 1950
Creator: Anderson, Miles E., 1926-
Description: The problem with which we shall concern ourselves in this paper is the self-scattering and self-absorption of beta particles by the source.
Contributing Partner: UNT Libraries