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1,428 Matching Results
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Negotiation, communication, and decision strategies used by hostage/crisis negotiators.
By conducting this theory-based empirical study, gathering data from working negotiators in the US and Canada, I have determined what primary dynamic activities, communication skills, and negotiation tools are used by hostage/crisis negotiators. Negotiators implement their negotiation and decision strategies differently depending on whether the situations they deal with are instrumental or expressive. I have determined which elements of negotiations and factors affecting negotiations differ while handling instrumental and expressive hostage situations. I found that the collected data did not reveal any significant relationship between handling instrumental/expressive hostage situations differently and belief in the elements of Brenda Dervin's and Shannon-Weaver's theories. I have also determined that the belief in the elements of the Dervin's and Shannon-Weaver's theories is workable and practical for negotiators to use. Based on the above findings, the model suggested by this research adds the elements and directives of Dervin's and Shannon-Weaver's models to the common approach used by the negotiators. This revised model suggests that the negotiators pay attention to the dynamics of the interactions presented between the two parties: the negotiators themselves and hostage takers. The revised model also recommends that the negotiators focus on not only the hostage takers behavioral characteristics, psychological conditions, and …
Date:
May 2008
Creator:
Hancerli, Suleyman
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Network Communication as a Service-Oriented Capability
In widely distributed systems generally, and in science-oriented Grids in particular, software, CPU time, storage, etc., are treated as"services" -- they can be allocated and used with service guarantees that allows them to be integrated into systems that perform complex tasks. Network communication is currently not a service -- it is provided, in general, as a"best effort" capability with no guarantees and only statistical predictability. In order for Grids (and most types of systems with widely distributed components) to be successful in performing the sustained, complex tasks of large-scale science -- e.g., the multi-disciplinary simulation of next generation climate modeling and management and analysis of the petabytes of data that will come from the next generation of scientific instrument (which is very soon for the LHC at CERN) -- networks must provide communication capability that is service-oriented: That is it must be configurable, schedulable, predictable, and reliable. In order to accomplish this, the research and education network community is undertaking a strategy that involves changes in network architecture to support multiple classes of service; development and deployment of service-oriented communication services, and; monitoring and reporting in a form that is directly useful to the application-oriented system so that it may …
Date:
January 8, 2008
Creator:
Johnston, William; Johnston, William; Metzger, Joe; Collins, Michael; Burrescia, Joseph; Dart, Eli et al.
Object Type:
Book
System:
The UNT Digital Library
Phase patterns of coupled oscillators with application to wireless communication
Here we study the plausibility of a phase oscillators dynamical model for TDMA in wireless communication networks. We show that emerging patterns of phase locking states between oscillators can eventually oscillate in a round-robin schedule, in a similar way to models of pulse coupled oscillators designed to this end. The results open the door for new communication protocols in a continuous interacting networks of wireless communication devices.
Date:
January 2, 2008
Creator:
Arenas, A.
Object Type:
Article
System:
The UNT Digital Library
Pedagogical Approach and Instructional Format: An Exploration of the Introductory Communication Course
The goal of this study was to analyze the impact of instructional format and pedagogical approach on students' learning and motivation within the introductory communication course. Three hundred eighty-five students participated in this study within one of four contexts: face-to-face instruction with service-learning, face-to-face instruction without service-learning, blended instruction with service-learning, and blended instruction without service-learning. A series of MANOVAs was utilized for the study. Results of the study, possible explanations for the results, limitations, and guidelines for future research are presented.
Date:
May 2008
Creator:
Tucker, Kristan Ann
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Integrated Computing, Communication, and Distributed Control of Deregulated Electric Power Systems
Restructuring of the electricity market has affected all aspects of the power industry from generation to transmission, distribution, and consumption. Transmission circuits, in particular, are stressed often exceeding their stability limits because of the difficulty in building new transmission lines due to environmental concerns and financial risk. Deregulation has resulted in the need for tighter control strategies to maintain reliability even in the event of considerable structural changes, such as loss of a large generating unit or a transmission line, and changes in loading conditions due to the continuously varying power consumption. Our research efforts under the DOE EPSCoR Grant focused on Integrated Computing, Communication and Distributed Control of Deregulated Electric Power Systems. This research is applicable to operating and controlling modern electric energy systems. The controls developed by APERC provide for a more efficient, economical, reliable, and secure operation of these systems. Under this program, we developed distributed control algorithms suitable for large-scale geographically dispersed power systems and also economic tools to evaluate their effectiveness and impact on power markets. Progress was made in the development of distributed intelligent control agents for reliable and automated operation of integrated electric power systems. The methodologies employed combine information technology, control and …
Date:
September 24, 2008
Creator:
Bajura, Richard & Feliachi, Ali
Object Type:
Report
System:
The UNT Digital Library
Learner use of French second-person pronouns in synchronous electronic communication.
This study analyzes students' use of the French second-person pronouns tu (T) and vous (V) in small-group (2-3 students) inter-learner online chat sessions. The influence of internal linguistic factors (i.e., turn type and morphosyntactic environment) on learners' appropriate vs. inappropriate use of these pronouns is considered. The study also investigates the influence of Instructional Level on tu-vous use and the extent to which students from different instructional levels provide various types of peer assistance (e.g., lexical, morphosyntactic, and sociolinguistic/pragmatic) . Pronoun use was extremely unstable for learners of all levels, and a Kruskal-Wallis analysis revealed that Instructional Level did not significantly affect appropriate T/V use overall. Instructional Level and Syntax did, however, significantly affect interrogative T/V use, as shown through multivariate analyses. Peer-assisted performance was limited to lexical retrieval. Pedagogical recommendations are presented for teaching and learning second-person pronouns in French.
Date:
December 2008
Creator:
McCourt, Claire A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Stochastic models: theory and simulation.
Many problems in applied science and engineering involve physical phenomena that behave randomly in time and/or space. Examples are diverse and include turbulent flow over an aircraft wing, Earth climatology, material microstructure, and the financial markets. Mathematical models for these random phenomena are referred to as stochastic processes and/or random fields, and Monte Carlo simulation is the only general-purpose tool for solving problems of this type. The use of Monte Carlo simulation requires methods and algorithms to generate samples of the appropriate stochastic model; these samples then become inputs and/or boundary conditions to established deterministic simulation codes. While numerous algorithms and tools currently exist to generate samples of simple random variables and vectors, no cohesive simulation tool yet exists for generating samples of stochastic processes and/or random fields. There are two objectives of this report. First, we provide some theoretical background on stochastic processes and random fields that can be used to model phenomena that are random in space and/or time. Second, we provide simple algorithms that can be used to generate independent samples of general stochastic models. The theory and simulation of random variables and vectors is also reviewed for completeness.
Date:
March 1, 2008
Creator:
Field, Richard V., Jr.
Object Type:
Report
System:
The UNT Digital Library
JAC: A Journal of Composition Theory, Volume 28, Numbers 1 & 2, 2008
JAC: A Journal of Composition Theory contains a collection of papers regarding writing and rhetoric: "The JAC is a forum for theory, research and pedagogy regarding (1) those writing courses beyond the freshman courses, excluding technical and creative writing, (2) writing in courses which are not themselves writing courses, particularly in the liberal arts and sciences, and (3) work in theory, research or pedagogy which is advanced or progressive and will shed light on the field as a whole while at the same time providing insights for advanced composition" (volume 1, number 1).
Date:
2008
Creator:
Association of Teachers of Advanced Composition (U.S.)
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
JAC: A Journal of Composition Theory, Volume 28, Numbers 3 & 4, 2008
JAC: A Journal of Composition Theory contains a collection of papers regarding writing and rhetoric: "The JAC is a forum for theory, research and pedagogy regarding (1) those writing courses beyond the freshman courses, excluding technical and creative writing, (2) writing in courses which are not themselves writing courses, particularly in the liberal arts and sciences, and (3) work in theory, research or pedagogy which is advanced or progressive and will shed light on the field as a whole while at the same time providing insights for advanced composition" (volume 1, number 1).
Date:
2008
Creator:
Association of Teachers of Advanced Composition (U.S.)
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Turbulent Equipartition Theory of Toroidal Momentum Pinch
The mode-independet part of magnetic curvature driven turbulent convective (TuroCo) pinch of the angular momentum density [Hahm et al., Phys. Plasmas 14,072302 (2007)] which was originally derived from the gyrokinetic equation, can be interpreted in terms of the turbulent equipartition (TEP) theory. It is shown that the previous results can be obtained from the local conservation of "magnetically weighted angular momentum density," nmi U|| R⁄B2, and its homogenization due to turbulent flows. It is also demonstrated that the magnetic curvature modification of the parallel acceleration in the nonlinear gyrokinetic equation in the laboratory frame, which was shown to be responsible for the TEP part of the TurCo pinch of angular momentum density in the previous work, is closely related to the Coriolis drift coupling to the perturbed electric field. In addition, the origin of the diffusive flux in the rotating frame is highlighted. Finally, it is illustratd that there should be a difference in scalings between the momentum pinch originated from inherently toroidal effects and that coming from other mechanisms which exist in a simpler geometry.
Date:
January 31, 2008
Creator:
Hahm, T. S.; Diamond, P. H.; Gurcan, O. D. & Rewaldt, G.
Object Type:
Article
System:
The UNT Digital Library
National Computational Infrastructure for Lattice Gauge Theory
In this document we describe work done under the SciDAC-1 Project National Computerational Infrastructure for Lattice Gauge Theory. The objective of this project was to construct the computational infrastructure needed to study quantim chromodynamics (QCD). Nearly all high energy and nuclear physicists in the United States working on the numerical study of QCD are involved in the project, as are Brookhaven National Laboratory (BNL), Fermi National Accelerator Laboratory (FNAL), and Thomas Jefferson National Accelerator Facility (JLab). A list of the serior participants is given in Appendix A.2. The project includes the development of community software for the effective use of the terascale computers, and the research and development of commodity clusters optimized for the study of QCD. The software developed as part of this effort is pubicly available, and is being widely used by physicists in the United States and abroad. The prototype clusters built with SciDAC-1 fund have been used to test the software, and are available to lattice guage theorists in the United States on a peer reviewed basis.
Date:
May 30, 2008
Creator:
Reed, Daniel, A
Object Type:
Report
System:
The UNT Digital Library
An Investigation of the Nonverbal Communication Behaviors and Role Perceptions of Pre-Service Band Teachers who Participated in Theatre Seminars
This qualitative study used a multiple case study methodology to explore the nonverbal communication behaviors and role perceptions of pre-service band teachers, and the extent to which these individuals found meaning and value in theatre seminars with respect to those factors. The informants participated in three theatre seminars taught by theatre faculty at the researcher's university. The researcher collected data in the form of videotaped theatre seminar observations, videotaped classroom teaching observations, videotaped informant reflections of teaching episodes, online peer discussions and journaling, and informant interviews. Data were analyzed, coded, and summarized to form case summaries. A cross-case analysis was performed to identify emergent themes. The broad themes identified were past experience, adaptation, realization, and being aware. The informants found that the theatre seminars increased their awareness of nonverbal communication behaviors in the classroom, and had the potential to be meaningful and valuable with respect to their perceptions of their roles as teachers.
Date:
August 2008
Creator:
Vandivere, Allen Hale
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Density functional theory study of mercury adsorption on metal surfaces
Density functional theory #1;DFT#2; calculations are used to characterize the interaction of mercury with copper, nickel, palladium, platinum, silver, and gold surfaces. Mercury binds relatively strongly to all the metal surfaces studied, with binding energies up to #3;1 eV for Pt and Pd. DFT calculations underestimate the energy of adsorption with respect to available experimental data. Plane-wave DFT results using the local density approximation and the Perdew-Wang 1991 and Perdew-Burke-Ernzerhof parametrizations of the generalized gradient approximation indicate that binding of mercury at hollow sites is preferred over binding at top or bridge sites. The interaction with mercury in order of increasing reactivity over the six metals studied is Ag #1;Au#1;Cu#1;Ni#1;Pt#1;Pd. Binding is stronger on the #1;001#2; faces of the metal surfaces, where mercury is situated in fourfold hollow sites as opposed to the threefold hollow sites on #1;111#2; faces. In general, mercury adsorption leads to decreases in the work function; adsorbate-induced work function changes are particularly dramatic on Pt.
Date:
January 1, 2008
Creator:
Steckel, J.A.
Object Type:
Article
System:
The UNT Digital Library
Interpretation of the Finite Pressure Gradient Effects in the Reversed Shear Alfvén Eigenmode Theory
Ideal MHD equations employed in the NOVA code are analyzed analytically and numerically in order to investigate the role of the pressure gradient on global reversed shear Alfvén eigenmodes (RSAEs) or Alfvén cascades. We confirm both numerically and analytically conclusions obtained earlier using the ideal MHD code NOVA and analytically that the plasma pressure gradient plays a key role in the existence condition and in the dispersion relation for the mode. The effect of the plasma pressure gradient is to shift the mode frequency up at the low part of the RSAE frequency chirp and downshift the mode frequency when the frequency approaches the TAE gap This finding is opposite to predictions in a recent publication , where the pressure gradient is found to be always stabilizing by means of downshifting the RSAE frequency and enhancing its in- teraction with the continuum. We resolve this discrepancy by showing that neglecting the pressure gradient effect on the plasma equilibrium (modification of the Shafranov shift and the averaged curvature) leads to conclusions at variance to the numerical and analytical results presented here. A new variational approximation of the RSAE is introduced which compares remarkably well with NOVA solutions. With this new approximation …
Date:
February 21, 2008
Creator:
N.N. Gorelenkov, G.J. Kramer, R. Nazikian
Object Type:
Report
System:
The UNT Digital Library
LDRD final report on theory and exploration of quantum-dot optical nonlinearities and coherences.
A microscopic theory for investigating quantum-dot optical properties was developed. The theory incorporated advances on various aspects of quantum-dot physics developed at Sandia and elsewhere. Important components are a non-Markovian treatment of polarization dephasing due to carrier-carrier scattering (developed at Sandia) and a nonperturbative treatment within a polaron picture of the scattering of carriers by longitudinal-optical phonons (developed at Bremen University). A computer code was also developed that provides a detailed accounting of electronic structure influences and a consistent treatment of many-body effects, the latter via the incorporation of results from the microscopic theory. This code was used to explore quantum coherence physics in a quantum-dot system. The investigation furthers the understanding of the underlying differences between atomic quantum coherence and semiconductor quantum coherence, and helps improve the potential of using quantum coherences in quantum computing, coherent control and high-resolution spectroscopy.
Date:
November 1, 2008
Creator:
Chow, Weng Wah
Object Type:
Report
System:
The UNT Digital Library
Theoria, Volume 15, 2008
Annual journal containing essays, studies, book reviews, and other articles related to the history of Western Music Theory, methods of analysis, and analytical discussions of musical compositions. The appendix includes corrigenda from the preceding volume, information about contributors to the current volume, and an index of content in previously-issued volumes.
Date:
2008
Creator:
Heidlberger, Frank
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Critical Theory and Preservice Art Education: One Art Teacher Educator's Journey of Equipping Art Teachers for Inclusion.
This qualitative action research study examines how critical theory defined and guided my practice as an art teacher educator while I provided inclusion training for seven preservice art teachers during their student teaching. Sources of data included a personal journal, the inclusion curriculum I created for the preservice teachers and questionnaires and interviews. Primary findings indicated that critical theory had a substantive impact on the evolving development of my teaching philosophy, in particular my attention to issues of power redistribution in the classroom and my developing notion of teaching as form of artistry. The findings of this study also indicate that the primary impact of critical theory upon the preservice teachers was the articulation of their personal narratives and its relation to the development of their teaching identities. Further, mentoring these preservice art teachers in critical theory increased their competence in solving educational dilemmas. A primary finding of this study was how significant of a role the supervising or mentor teacher plays in developing preservice teachers' identity. As this is acknowledged, valued and utilized, more collaborative relationships among these stakeholders in the education of the preservice art teacher can be forged. The study provides implications for art teacher educators as …
Date:
May 2008
Creator:
Allison, Amanda
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Determination of Transport Properties From Flowing Fluid Temperature LoggingIn Unsaturated Fractured Rocks: Theory And Semi-Analytical Solution
Flowing fluid temperature logging (FFTL) has been recently proposed as a method to locate flowing fractures. We argue that FFTL, backed up by data from high-precision distributed temperature sensors, can be a useful tool in locating flowing fractures and in estimating the transport properties of unsaturated fractured rocks. We have developed the theoretical background needed to analyze data from FFTL. In this paper, we present a simplified conceptualization of FFTL in unsaturated fractured rock, and develop a semianalytical solution for spatial and temporal variations of pressure and temperature inside a borehole in response to an applied perturbation (pumping of air from the borehole). We compare the semi-analytical solution with predictions from the TOUGH2 numerical simulator. Based on the semi-analytical solution, we propose a method to estimate the permeability of the fracture continuum surrounding the borehole. Using this proposed method, we estimated the effective fracture continuum permeability of the unsaturated rock hosting the Drift Scale Test (DST) at Yucca Mountain, Nevada. Our estimate compares well with previous independent estimates for fracture permeability of the DST host rock. The conceptual model of FFTL presented in this paper is based on the assumptions of single-phase flow, convection-only heat transfer, and negligible change in …
Date:
August 1, 2008
Creator:
Mukhopadhyay, Sumit & Tsang, Yvonne W.
Object Type:
Article
System:
The UNT Digital Library
IT Offshoring Success: A Social Exchange Perspective
Spending by U.S. companies in offshore IT services continues at unprecedented levels despite a high failure rate. This study fills a gap in the existing literature by examining the client-vendor offshoring relationship through the theoretical lens of social exchange theory at the organizational level of analysis from the client's perspective. Social exchange theory focuses on the exchange of activities between two parties, whether they are individuals or companies and was used as a basis for examining the client and vendor relationship. Variables were identified by a review of the literature primarily from IT outsourcing and offshoring but also from general IT, marketing, sociology and organizational science literature. Data was collected using a field survey of Fortune 500 CIOs representing a population of organizations at the forefront of the offshoring phenomenon. The survey instrument was developed based on the adaptation of previously validated scales. Hypotheses regarding the correlations between social variables such as trust, communication, dependence, power, shared values and offshoring success were tested using Spearman's rho correlation. Seven of the hypotheses were supported, four hypotheses were not supported and one hypothesis was deemed not testable due to lack of information.
Date:
August 2008
Creator:
St. John, Jeremy
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Philosophy of Mind and the Problem of FreeWill in the Light of Quantum Mechanics.
Arguments pertaining to the mind-brain connection and to the physical effectiveness of our conscious choices have been presented in two recent books, one by John Searle, the other by Jaegwon Kim. These arguments are examined, and it is argued that the difficulties encountered arise from a defective understanding and application of a pertinent part of contemporary science, namely quantum mechanics.
Date:
April 1, 2008
Creator:
Stapp, Henry & Stapp, Henry P
Object Type:
Book
System:
The UNT Digital Library
An Analysis of Gay/Lesbian Instructor Identity in the Classroom
In this project I explore the connection between cultural and personal identity in the college classroom. Respondent interviews were conducted using open-ended questions, which began with a broad picture of the role the instructor played in the classroom and then focused more specifically on the issue of sexual orientation and the choices to disclose or not disclose orientation in the classroom. Thematic analysis was used to examine the interviews, upon the completion of the interviews being transcribed. RQ1: Do gay and lesbian instructors disclose their sexual orientation in the classroom? From this question, four themes emerged. These themes were disclosure not relevant, out of the classroom disclosure, students just know, and disclosure in the classroom. RQ2: What reasons do gay and lesbian instructors give for disclosing their sexual orientation in the classroom? Two themes, fears of disclosure and holding back, transpired from this question. RQ3: How do gay and lesbian instructors foster diversity in the classroom related to sexual orientation? Four themes were exposed from the question, and these themes were paradox of diversity, passing, mentoring, and identity not sexuality.
Date:
May 2008
Creator:
Giovanini, Heather
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
From Knowledge, Knowability and the Search for Objective Randomness to a New Vision of Complexity
Paper discussing knowledge, knowability, and the search for objective randomness to a new vision of complexity.
Date:
February 2, 2008
Creator:
Allegrini, Paolo; Giuntoli, Martina; Grigolini, Paolo & West, Bruce J.
Object Type:
Paper
System:
The UNT Digital Library
Monodromy in the CMB: Gravity Waves and String Inflation
None
Date:
March 25, 2008
Creator:
Silverstein, Eva & Westphal, Alexander
Object Type:
Report
System:
The UNT Digital Library
Caregiver Involvement in Hospice Interdisciplinary Team Meetings: A case study
Article on a case study detailing caregiver involvement in hospice interdisciplinary team meetings.
Date:
2008
Creator:
Wittenberg-Lyles, Elaine; Oliver, Debra Parker; Demiris, George; Petty, Bethany & Day, Michele L.
Object Type:
Article
System:
The UNT Digital Library