You limited your search to:

  Partner: UNT Libraries
 Language: English
3GPP Long Term Evolution LTE Scheduling

3GPP Long Term Evolution LTE Scheduling

Date: December 2013
Creator: Alotaibi, Sultan
Description: Future generation cellular networks are expected to deliver an omnipresent broadband access network for an endlessly increasing number of subscribers. Long term Evolution (LTE) represents a significant milestone towards wireless networks known as 4G cellular networks. A key feature of LTE is the implementation of enhanced Radio Resource Management (RRM) mechanism to improve the system performance. The structure of LTE networks was simplified by diminishing the number of the nodes of the core network. Also, the design of the radio protocol architecture is quite unique. In order to achieve high data rate in LTE, 3rd Generation Partnership Project (3GPP) has selected Orthogonal Frequency Division Multiplexing (OFDM) as an appropriate scheme in terms of downlinks. However, the proper scheme for an uplink is the Single-Carrier Frequency Domain Multiple Access due to the peak-to-average-power-ratio (PAPR) constraint. LTE packet scheduling plays a primary role as part of RRM to improve the system’s data rate as well as supporting various QoS requirements of mobile services. The major function of the LTE packet scheduler is to assign Physical Resource Blocks (PRBs) to mobile User Equipment (UE). In our work, we formed a proposed packet scheduler algorithm. The proposed scheduler algorithm acts based on the number ...
Contributing Partner: UNT Libraries
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.
Contributing Partner: UNT Libraries
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
AACR 2 Headings: A Five-Year Projection of Their Impact on Catalogs

AACR 2 Headings: A Five-Year Projection of Their Impact on Catalogs

Date: 1982
Creator: Taylor, Arlene G., 1941-
Description: Text providing an overview of research and results regarding the implementation of AACR2 (Anglo-American Cataloging Rules, Second Edition) and the effects on existing catalogs. It includes an overview of the problem and hypotheses, literature review, general research method, description of study libraries, differences found in samples between AACR 2 and pre-AACR 2 headings, conflicting headings found in catalogs, OCLC (Online Computer Library Center) and AACR 2 headings, summary and conclusions, and related appendices. Index starts on page 143.
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
Ab Initio and Density Functional Investigation of the Conformer Manifold of Melatonin and a Proposal for a Simple Dft-based Diagnostic for Nondynamical Correlation

Ab Initio and Density Functional Investigation of the Conformer Manifold of Melatonin and a Proposal for a Simple Dft-based Diagnostic for Nondynamical Correlation

Access: Use of this item is restricted to the UNT Community.
Date: August 2013
Creator: Fogueri, Uma
Description: In this work we address two problems in computational chemistry relevant to biomolecular modeling. In the first project, we consider the conformer space of melatonin as a a representative example of “real-life” flexible biomolecules. Geometries for all 52 unique conformers are optimized using spin-component scaled MP2, and then relative energies are obtained at the CCSD (T) level near the complete basis set limit. These are then used to validate a variety of DFT methods with and without empirical dispersion corrections, as well as some lower-level ab initio methods. Basis set convergence is found to be relatively slow due to internal C-H…O and C-H…N contacts. Absent dispersion corrections, many DFT functionals will transpose the two lowest conformers. Dispersion corrections resolve the problem for most functionals. Double hybrids yield particularly good performance, as does MP2.5. In the second project, we propose a simple DFT-based diagnostic for nondynamical correlation effects. Aλ= (1-TAE [ΧλC]/TAE[XC])/λ where TAE is the total atomization energy, XC the “pure” DFT exchange-correlation functional, and ΧλC the corresponding hybrid with 100λ% HF-type exchange. The diagnostic is a good predictor for sensitivity of energetics to the level of theory, unlike most of the wavefunction-based diagnostics. For GGA functionals, Aλ values approaching unity ...
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 ...
Contributing Partner: UNT Libraries
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
Ability of Offenders with Psychopathic Traits to Simulate Cognitive and Affective Empathy

Ability of Offenders with Psychopathic Traits to Simulate Cognitive and Affective Empathy

Date: August 2013
Creator: Robinson, Emily V.
Description: The accurate assessment of psychopathy constitutes a critical component of forensic assessments addressing offender populations. Among the core characteristics of psychopathy, the interpersonal component of deception and empathic deficits are prominently observed in offenders with psychopathic traits. Given the negative consequences of being classified as a psychopath, offenders may be likely to minimize their psychopathic traits. In particular, no research has investigated whether offenders with psychopathic traits are able to simulate empathy in an effort to mask their cognitive or affective empathy deficits (e.g., lack of remorse about offenses). The present study aims to contribute to the literature with regard to the simulation of empathy. Using a mixed between- and within-subjects design, 81 male detainees were placed into (a) a low psychopathy group, (b) a moderate psychopathy group, or (c) a high psychopathy group based on the Psychopathy Checklist – Revised. For the within-subjects component, all offenders answered empathy questionnaires under genuine and simulation conditions. Results indicate the sample possessed cognitive empathy, but did not display affective empathy under genuine instructions. Under simulation instructions, participants significantly increased their scores on several empathy measures. The implications of simulated empathy and comparisons between groups regarding simulation abilities are discussed.
Contributing Partner: UNT Libraries
Abrupt Climate Change: Final Report

Abrupt Climate Change: Final Report

Date: December 2008
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.
Contributing Partner: UNT Libraries