U N T Established 1890 U N T
University Libraries

Digital Collections

Access

Resource Type

Partner

Collection

Serial/Series Title

Degree Department

Degree Discipline

Degree Level

Country

States

Counties

Decade

Year

Month

Day

Language

206,210 Matching Results

Results open in a new window/tab. Unexpected Results? Search the Catalog Instead.

prev Results: 49 - 72 of 206,210 next
Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
Collective communication routines in PVM (open access)

Collective communication routines in PVM

The collective communication routines of scatter, gather, and reduce are frequently implemented as part of the native library for parallel architectures. These operations have been implemented in PVM for use among a heterogeneous system of workstations and parallel computers forming a virtual parallel machine. In the case of the Intel Paragon machines, the PVM implementation of the reduce operation utilizes the corresponding native mode library routines whenever possible. This paper describes the implementation of these collective communication routines in PVM including the utilization of the Intel Paragon native mode operations. Performance data is also given comparing the use of the native Intel Paragon collective routines and the PVM implementation on top of these routines on a dedicated Intel Paragon. For our timing results an average latency of 109 {mu}s is incurred using PVM as compared to the native Intel global sum routine. This extra startup is independent of the size of the message being sent and the number of nodes in the group. It is demonstrated that the use of static groups is preferable in time efficiency over the use of dynamic groups.
Date: May 1, 1996
Creator: Donato, J. M. & Geist, G. A.
Object Type: Report
System: The UNT Digital Library
Fiber optic communication links (open access)

Fiber optic communication links

Fiber optics is a new, emerging technology which offers relief from many of the problems which limited past communications links. Its inherent noise immunity and high bandwidth open the door for new designs with greater capabilities. Being a new technology, certain problems can be encountered in specifying and installing a fiber optic link. A general fiber optic system is discussed with emphasis on the advantages and disadvantages. It is not intended to be technical in nature, but a general discussion. Finally, a general purpose prototype Sandia communications link is presented.
Date: January 1, 1980
Creator: Meyer, R. H.
Object Type: Article
System: The UNT Digital Library
Interprocessor communication with memory constraints (open access)

Interprocessor communication with memory constraints

Many parallel applications require periodic redistribution of workloads and associated data. In a distributed memory computer, this redistribution can be difficult if limited memory is available for receiving messages. The authors propose a model for optimizing the exchange of messages under such circumstances which they call the minimum phase remapping problem. They first show that the problem is NP-Complete, and then analyze several methodologies for addressing it. First, they show how the problem can be phrased as an instance of multi-commodity flow. Next, they study a continuous approximation to the problem. They show that this continuous approximation has a solution which requires at most two more phases than the optimal discrete solution, but the question of how to consistently obtain a good discrete solution from the continuous problem remains open. Finally, they devise a simple and practical approximation algorithm for the problem with a bound of 1.5 times the optimal number of phases.
Date: May 30, 2000
Creator: PINAR,ALI & HENDRICKSON,BRUCE A.
Object Type: Article
System: The UNT Digital Library
Interprocessor communication with limited memory (open access)

Interprocessor communication with limited memory

Many parallel applications require periodic redistribution of workloads and associated data. In a distributed memory computer, this redistribution can be difficult if limited memory is available for receiving messages. We propose a model for optimizing the exchange of messages under such circumstances which we call the minimum phase remapping problem. We first show that the problem is NP-Complete, and then analyze several methodologies for addressing it. First, we show how the problem can be phrased as an instance of multi-commodity flow. Next, we study a continuous approximation to the problem. We show that this continuous approximation has a solution which requires at most two more phases than the optimal discrete solution, but the question of how to consistently obtain a good discrete solution from the continuous problem remains open. We also devise simple and practical approximation algorithm for the problem with a bound of 1.5 times the optimal number of phases. We also present an empirical study of variations of our algorithms which indicate that our approaches are quite practical.
Date: May 7, 2003
Creator: Pinar, Ali & Hendrickson, Bruce
Object Type: Article
System: The UNT Digital Library
Communication: From Molecules to Mars (open access)

Communication: From Molecules to Mars

An analysis is made of the energetic, molecular, macromolecular and organizational steps which appear to be essential for the development of a living cell from a nonliving origin. Accepting the current view of the primitive atmosphere of the earth, experimental demonstration for the formation of the fundamental molecules of living organisms (amino acids, fatty acids, purines and pyrimidines) under the influence of available energy sources (ultraviolet light, ionizing radiation and electric discharge) is presented.
Date: August 1, 1962
Creator: Calvin, Melvin
Object Type: Article
System: The UNT Digital Library
Toward a Critique of the Message Construct in Communication (open access)

Toward a Critique of the Message Construct in Communication

The idea of an inherent structure of meaning in human communication is identified as the message construct. Traces of the construct in textbook models of the basic communication process and in popular magazine images of communication are examined. The argument is raised that objectifying the message has resulted in a paradigm which focuses disproportionately on explicit, representational, and instrumental aspects of communication. An alternative conception is proposed which would take into account implicit, constitutive, and generative aspects.
Date: August 1991
Creator: Wilson, John K. (John Kenneth)
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Directorial Roles: a Study in Theatrical Communication (open access)

Directorial Roles: a Study in Theatrical Communication

This study examines the process of theatrical direction as a communication system. Its components are described in terms of their function as elements of a communication process. The communication activities within the theatrical process are analyzed by means of four categories of theatrical communication networks: conceptual, aesthetic, observational, and social. Theories of communication have been surveyed and then applied to the theatrical process. Particular attention is paid to role functions of the director within the social and the aesthetic networks. The conclusion reached in the study is that the effectiveness of the communication networks used in theatrical directing is determined by the functional roles and the leadership styles adopted by the director as he participates in these networks.
Date: August 1977
Creator: DeVore, Brenda K.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Computer Supported Collaboration: Is the Transfer of Cognitive Structures Mediated by Mode of Communication? (open access)

Computer Supported Collaboration: Is the Transfer of Cognitive Structures Mediated by Mode of Communication?

The objective of this study was to observe evidence of structural transfer among subjects in a group problem-solving activity and determine whether mode of collaborative technology or use of a priming agent affected the nature of transferred structures. Evidence for structural transfer is found in three theoretical perspectives: organizational ditransitive (linguistic) verb structures, adaptive structuration theory, and mental model transfer theory. Dependent variables included various grammatical structures and coefficients derived from pretest and posttest scores on David Kolb's Learning Styles Inventory, modified for the experiment. The combination of changes in grammatical frequencies and learning style may suggest that one or more media or the priming agent may affect structural transfer. Results indicate that groups using the GroupSystems™ collaborative technology produced less overall linguistic content than did subjects using a generic chat system, but employed more complex language as indicated by frequency of the organizational ditransitive verb structure. Also, subjects supplied with an organization chart (priming agent) during the group problem-solving session experienced greater change on the learning styles inventory than did those participating in the session without the chart. These findings suggest that mode of communication and use of priming agents may contribute positively or negatively to the transfer of …
Date: May 2002
Creator: Bandy, Kenneth E.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Double Binding Communication: Emotionally Disruptive Effects on College Students (open access)

Double Binding Communication: Emotionally Disruptive Effects on College Students

This study investigated the emotionally disruptive effects of double binding communication, as compared with overtly punitive, and warm, accepting interactions. Forty-two college undergraduates scoring above the mean on the Neuroticism Subscale of Eysenck's Personality Questionaire were each directed to play the part of a small child in a spontaneous role-played family interaction. A pre-post mood test (Multiple Adjective Affect Check List), sensitive to changes in depression, hostility, and anxiety was administered. It was found that subjects in the double-bind and punitive conditions evidenced significant mood disturbance while subjects in the control group did not (all ps < .05). Implications for Double Bind Theory were discussed.
Date: May 1983
Creator: Loos, Victor Eugene
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Communication and Conflict in Marital Dyads: A Personal Construct Approach (open access)

Communication and Conflict in Marital Dyads: A Personal Construct Approach

A typology of marital dyads derived from Kelly's (1955) Personal Construct Psychology was used to investigate the communicative behaviors of married companions. Four groups based on Kelly's Commonality (dyadic similarity) and Sociality (dyadic understanding) corollaries were contrasted: similar-understanding, dissimilar-understanding, similar-misunderstanding, and dissimilar-misunderstanding couples. It was expected that dyadic understanding would contribute more to self-disclosure, cooperative involvement, and marital satisfaction than dyadic similarity. Furthermore, it was anticipated that couples high in understanding and low in similarity would represent optimally functioning couples, as evidenced by disclosure, satisfaction, and involvement with each other. Sixty-three married couples who had known each other at least two years completed questionnaire items assessing demographic variables, marital satisfaction (Dyadic Adjustment Scale) and self-reported communication behaviors (Partner Communication Inventory, Dyadic Disclosure Inventory). Each spouse also completed an 8 X 8 Repertory Grid and predicted the mate's responses on the Rep Grid. Subjects then participated in three different audio-taped discussion tasks (an informal conversation, a consensus decision-making task, and a role-played conflict-resolution scene) which were rated for avoidant, competitive, and cooperative responses, as well as overall self-disclosure. Although understanding facilitated disclosure in conflict situations and similarity fostered marital satisfaction, communicative behaviors generally reflected the joint influence of both similarity and …
Date: August 1986
Creator: Loos, Victor Eugene
Object Type: Thesis or Dissertation
System: The UNT Digital Library
More connections, less connection: An examination of the effects of computer-mediated communication on relationships. (open access)

More connections, less connection: An examination of the effects of computer-mediated communication on relationships.

The impact of computer-mediated communication (CMC) on relational behavior is a topic of increasing interest to communication scholars (McQuillen, 2003; Tidwell & Walther, 2002). One of the most interesting issues that CMC raises concerns the impact of CMC on relational maintenance and development. Using dialectical theory, social exchange theory, social information processing theory, and the hyperpersonal perspective as theoretical frameworks, this study used quantitative and qualitative analyses to identity potential effects of CMC on relationships. Study 1 (n=317) examined the effects of CMC on relational closeness, satisfaction, and social support. Study 2 (n=196) explored the reasons individuals provide for privileging computer-mediated forms of communication, and the perceived effects of using CMC in relational communication. Results indicated that quality of CMC predicted increased perceptions of social support and relationship satisfaction. Results further suggested that CMC enabled participants to manage more effectively relational tensions of autonomy-connection and openness-closedness. Specifically, individuals used CMC to retain higher levels of conversational control, and to maintain greater numbers of relationships with decreased levels of investment. This paper concludes with a discussion of implications and directions for future research.
Date: December 2006
Creator: McGlynn, Joseph
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Comparison of Communication Motives of On-Site and Off-Site Students in Videoconference-Based Courses (open access)

A Comparison of Communication Motives of On-Site and Off-Site Students in Videoconference-Based Courses

The objective of this investigation is to determine whether student site location in an instructional videoconference is related to students' motives for communicating with their instructor. The study is based, in part, on the work of Martin et al. who identify five separate student-teacher communication motives. These motives, or dimensions, are termed relational, functional, excuse, participation, and sycophancy, and are measured by a 30-item questionnaire. Several communication-related theories were used to predict differences between on-site and off-site students, Media richness theory was used, foundationally, to explain differences between mediated and face-to-face communication and other theories such as uncertainty reduction theory were used in conjunction with media richness theory to predict specific differences.Two hundred eighty-one completed questionnaires were obtained from Education and Library and Information Science students in 17 separate course-sections employing interactive video at the University of North Texas during the Spring and Summer semesters of the 2001/2002 school year. This study concludes that off-site students in an instructional videoconference are more likely than their on-site peers to report being motivated to communicate with their instructor for participation reasons. If off-site students are more motivated than on-site students to communicate as a means to participate, then it may be important …
Date: August 2002
Creator: Massingill, K.B.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Technical Communication and the Needs of Small 501(c)(3) Organizations (open access)

Technical Communication and the Needs of Small 501(c)(3) Organizations

This exploratory study examines documentation practices and processes in ten small non-profit organizations. The objectives of this study were to answer the following two research questions: (1) What organizational needs do small non-profit organizations have that are relevant to technical communication? and (2) How are small 501(c)(3) organizations attempting to meet these needs? Which of these attempted solutions are ineffective? Semi-structured interviews were conducted with two people from each organization: the executive director and a volunteer. Interviews were transcribed and analyzed, and grounded theory was used to identify coding categories related to documentation development. Primary findings suggest that interviewees are aware that they need documentation, yet they often postpone developing such documentation until problems develop. The study findings also suggest that interviewees across different nonprofit organizations value documentation for similar reasons. Strategies are provided for technical communicators interested in working with nonprofit organizations, and additional research avenues are identified.
Date: May 2006
Creator: Walton, Rebecca W.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Return-Entry Risk Communication Following 2012 Hurricane Sandy (open access)

Return-Entry Risk Communication Following 2012 Hurricane Sandy

Within risk communication, much is understood about pre-event warning related to evacuation and sheltering; however risk communication during the return-entry phase when ending evacuations has been largely under-studied in the disaster literature. Understanding of the return-entry risk communication process is important because returning early or prior to issuance of the all-clear message can make returnees susceptible to post-disaster risks, and also hamper post-disaster activities such as debris removal, traffic management, utility restoration and damage assessments. Guided by the Warning Components Framework and the Theory of Motivated Information Management, this dissertation focuses on risk communication as it pertains to organizational behavior during the return-entry process by examining how local emergency management organizations develop, disseminate and monitor return-entry messages. The data is collected through semi-structured telephone interviews with local emergency management organizations that managed return-entry following Hurricane Sandy. The findings of the study indicate that local emergency management organizations required information on post-disaster threats, damages, and utility and infrastructure condition in order to develop return-entry strategy for their community. Organizations improvised to their existing risk communication measures by adopting creative ways for information dissemination to the evacuees. They also utilized active and passive approach to monitor public response to the return-entry messages.
Date: December 2015
Creator: Manandhar, Rejina
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Case Study in Interpersonal Communication Training (open access)

A Case Study in Interpersonal Communication Training

The purpose of this study was to attempt to observe and quantify some of the effects of an experiential interpersonal communication training program on the individuals involved. The program studied was Speech 360, a laboratory communication course offered at North Texas State University. The design of the study involved three basic student groups -- a.) the fall 1970 Speech 360 students; b.) the Spring 1971 Speech 360 students; and c.) a control group of students similar to those in the course, but who were not involved in the training program.
Date: August 1972
Creator: Cowan, Christopher C.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
An Implementation of Consensus Through Bluetooth Communication (open access)

An Implementation of Consensus Through Bluetooth Communication

This thesis provides an implementation of consensus of multi-agent networked systems. Consensus problem is an important issue of distributed computing and has various algorithms and applications in the field of electronical and computer science. The consensus requests all nodes of a network reach an agreement over a certain measurement. An algorithm of convergent consensus problem is implemented through a small network of Bluetooth communication in the thesis. The connections of the Bluetooth devices are wireless, and the device nodes of the network are driven by C++ software and Winsock API. The simulation results show that the implementation completes all the requirements of the distributed consensus algorithm.
Date: May 2014
Creator: Wang, Yinan
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Risk communication in environmental restoration programs (open access)

Risk communication in environmental restoration programs

The author advocates adoption of a convergence model in place of the traditional source-receiver model of communication for communicating with members of the public who have a stake in remediation of a nearby site. The source-receiver model conceives of communication as the transmission of a message from a risk management agency (sender) to a target audience of the public (receivers). The underlying theme is that the sender intends to change the perception of the receiver of either the issue or the sender of information. The theme may be appropriate for health campaigns which seek to change public behavior; however, the author draws on her experience at a DOE site undergoing remediation to illustrate why the convergence model is more appropriate in the context of cleanup. This alternative model focuses on the Latin derivation of communication as sharing or making common to many, i.e., as involving a relationship between participants who engage in a process of communication. The focus appears to be consistent with recently issued DOE policy that calls for involving the public in identifying issues and problems and in formulating and evaluating decision alternatives in cleanup. By emphasizing context, process and participants, as opposed to senders and receivers, the …
Date: April 1, 1993
Creator: Bradbury, J.A.
Object Type: Article
System: The UNT Digital Library
Risk communication in environmental restoration programs (open access)

Risk communication in environmental restoration programs

The author advocates adoption of a convergence model in place of the traditional source-receiver model of communication for communicating with members of the public who have a stake in remediation of a nearby site. The source-receiver model conceives of communication as the transmission of a message from a risk management agency (sender) to a target audience of the public (receivers). The underlying theme is that the sender intends to change the perception of the receiver of either the issue or the sender of information. The theme may be appropriate for health campaigns which seek to change public behavior; however, the author draws on her experience at a DOE site undergoing remediation to illustrate why the convergence model is more appropriate in the context of cleanup. This alternative model focuses on the Latin derivation of communication as sharing or making common to many, i.e., as involving a relationship between participants who engage in a process of communication. The focus appears to be consistent with recently issued DOE policy that calls for involving the public in identifying issues and problems and in formulating and evaluating decision alternatives in cleanup. By emphasizing context, process and participants, as opposed to senders and receivers, the …
Date: April 1, 1993
Creator: Bradbury, J. A.
Object Type: Article
System: The UNT Digital Library
Fingerprinting Communication and Computation on HPC Machines (open access)

Fingerprinting Communication and Computation on HPC Machines

How do we identify what is actually running on high-performance computing systems? Names of binaries, dynamic libraries loaded, or other elements in a submission to a batch queue can give clues, but binary names can be changed, and libraries provide limited insight and resolution on the code being run. In this paper, we present a method for&quot;fingerprinting&quot; code running on HPC machines using elements of communication and computation. We then discuss how that fingerprint can be used to determine if the code is consistent with certain other types of codes, what a user usually runs, or what the user requested an allocation to do. In some cases, our techniques enable us to fingerprint HPC codes using runtime MPI data with a high degree of accuracy.
Date: June 2, 2010
Creator: Peisert, Sean
Object Type: Report
System: The UNT Digital Library
Time reversal signal processing for communication. (open access)

Time reversal signal processing for communication.

Time-reversal is a wave focusing technique that makes use of the reciprocity of wireless propagation channels. It works particularly well in a cluttered environment with associated multipath reflection. This technique uses the multipath in the environment to increase focusing ability. Time-reversal can also be used to null signals, either to reduce unintentional interference or to prevent eavesdropping. It does not require controlled geometric placement of the transmit antennas. Unlike existing techniques it can work without line-of-sight. We have explored the performance of time-reversal focusing in a variety of simulated environments. We have also developed new algorithms to simultaneously focus at a location while nulling at an eavesdropper location. We have experimentally verified these techniques in a realistic cluttered environment.
Date: September 1, 2011
Creator: Young, Derek P.; Jacklin, Neil; Punnoose, Ratish J. & Counsil, David T.
Object Type: Report
System: The UNT Digital Library
Independent communication messages: methodology and applications (open access)

Independent communication messages: methodology and applications

Information flowing on communication buses is ordinarily ``non-random`` in the sense that data entities are not equally likely and independent. This is because they have relationships to each other and to physical occurrences to which they may be responding. Random data would convey no information or meaning. From a different viewpoint, there can be applications for creating randomness characteristics, and four of these are described in this paper. Two examples derive from cryptology and the other two from safety. One cryptology application described is the generation of random numbers for use as, for example, keys, hash functions, nonces, and seeds. The other is for inter-message ``padding`` to resist traffic analysis by masking when data are being transmitted and when the channel is conveying no information. One of the safety applications described is the ``unique signal`` approach used in modern nuclear weapon electrical safety. The other is the use of unique signals as non-weapon critical-operation control functions. Both of these safety applications require provisions to help assure randomness characteristics in any inadvertently occurring inputs. In order to satisfy these cryptology and safety needs, communication strategies are described that generate or selectively encourage independent (unrelated) symbols or messages.
Date: September 1, 1997
Creator: Cooper, J.A.
Object Type: Article
System: The UNT Digital Library
Position Estimation of Tranceivers in Communication Networks (open access)

Position Estimation of Tranceivers in Communication Networks

With the rapid development in wireless sensor networks, there is an important need for transceiver position estimation independent of Global Positioning Systems (GPS) [1,3]. While GPS might be useful for outdoor sensor nodes, it is not for indoor node localization. In this case, position estimation is possible through network range estimates from time-of-flight (TOF) measurements, a technique well suited to large bandwidth physical links, such as in ultra-wideband (UWB) communications. For example, in our UWB systems, with pulse duration less than 200 pico-seconds, range can easily be resolved to less than a foot. Assuming an encoded UWB or spread spectrum physical layer, we developed algorithms and simulation tools to test transceiver position localization. Simulations were designed to lend insight into system characteristics such as position error sensitivities to network geometry, to range estimation errors, and to number of sensor nodes.
Date: October 13, 2003
Creator: Kent, C. A. & Dowla, F. U.
Object Type: Report
System: The UNT Digital Library
Position Estimation of Transceivers in Communication Networks (open access)

Position Estimation of Transceivers in Communication Networks

With rapid developments in wireless sensor networks, there is a growing need for transceiver position estimation independent of GPS, which may not be available in indoor networks. Our approach is to use range estimates from time-of-flight (TOF) measurements, a technique well suited to large bandwidth physical links, such as in ultra-wideband (UWB) systems. In our UWB systems, pulse duration less than 200 psecs can easily be resolved to less than a foot. Assuming an encoded UWB physical layer, we first test positioning accuracy using simulations. We are interested in sensitivity to range errors and the required number of ranging nodes, and we show that in a high-precision environment, such as UWB, the optimal number of transmitters is four. Four transmitters with {+-}20ft. range error can locate a receiver to within one or two feet. We then implement these algorithms on an 802.11 wireless network and demonstrate the ability to locate a network access point to approximately 20 feet.
Date: January 20, 2004
Creator: Dowla, F. & Kent, C.
Object Type: Article
System: The UNT Digital Library
Communication Skills for the 21st Century (open access)

Communication Skills for the 21st Century

Coursebook developed for pre-intermediate to intermediate English language learners. The course focuses on improving students' reading, listening and speaking skills. There is a focus on teaching discreet skills such as main idea, supporting details, making inferences, identifying referents and using context clues while reading. Specific speaking strategies are taught to improve fluency. Academic vocabulary is taught explicitly and implicitly. Book A topics: sleep, fashion, historical figures Ruby Bridges and Harriet Tubman Book B topics: Distractions, family, and the World Cup
Date: 2022
Creator: Geary, Shannon
Object Type: Book
System: The UNT Digital Library