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English language learners: Does summer school make a difference in young children's literacy scores?
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Many school districts consider literacy and oral language as a top priority for pre-kindergarten students. In the district under study, pre-kindergarten English language learner (ELL) students are encouraged to attend a special summer school program to increase their oral language ability in English. This study compared three groups of children: ELL students attending summer school v. ELL students not attending summer school v. English speaking students not attending summer school. The students' primary reading inventory scores from the end of pre-kindergarten to the middle of kindergarten in the areas of reading, writing and oral language were compared. As expected, ELLs who attended summer school showed significant growth in oral language development from the beginning of summer school to the end of summer school. While it was hypothesized that ELL students attending summer school would show more improvement in oral language than other children over time, there was no significant difference between summer school and non-summer school children's scores by the middle of kindergarten.
Date:
August 2006
Creator:
Wickert, DeAnna S.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Examination of the Relationships Between Affective Traits and Existential Life Positions
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There were two major goals of this study - to examine validity of scores for the Boholst Life Position Scale and to examine potential associations between life positions and affective traits. Two hundred seventy-seven students enrolled in undergraduate psychology classes at a large university volunteered for the study. Concurrent validity of scores for the life position scale was supported based on two compared instruments. Pearson product-moment correlations for the comparisons were -.765 and .617, both statistically significant at the p < .001 level. Factor analysis demonstrated that the scale could accurately be conceptualized as consisting of two factors - an "I" factor and a "You" factor. MANOVA, ANOVA, multiple linear regression, and canonical correlation analysis were used to examine associations between life positions and the affective traits of angry, sad, glad, social anxiety, loneliness, and satisfaction with life. Subjects were catagorized into four groups representing their life position: "I'm OK, you're OK," "I'm OK, you're not OK," "I'm not OK, you're OK," and "I'm not OK, you're not OK." A MANOVA employing life position as the independent variable with four levels and the six affective traits as the dependent variables demonstrated statistical significance (p < .001 level) and h2 was …
Date:
August 2004
Creator:
Wiesner, Van
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Stabat Mater by Frank Ferko, A Mosaic of Mourning: The Universality of Mothers' Grief, Ancient Texts Made Relevant by the Addition of English Interpolations
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This document examines Frank Ferko's unique setting of the ancient Latin sequence, Stabat Mater that incorporates five English interpolations dealing with the subject of parental grief over the loss of a child. The twenty Latin stanzas and five English interpolations are examined harmonically and philosophically, as two separate works. The tonal architecture of the work, outlined in two large arches built on key relationships, is explored in the body of the paper in addition to a graphic depiction and table of key centers. The interrelationship between key centers and textual considerations is examined. An extensive interview with the composer provided invaluable information regarding the creative process as it relates to the choice of English texts, compositional techniques and influences, and the stylistic musical diversity that characterizes the work. Three prominent American conductors, who have conducted significant performances Stabat Mater discussed specific problems and solutions in preparing and performing the work. Data pertaining to Stabat Mater history and other settings was gathered from reference materials, periodicals, and internet sources.
Date:
May 2006
Creator:
Wilson, Barbara Sue Johnston
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Confederate Pension Systems in Texas, Georgia, and Virginia: The Programs and the People
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The United States government began paying pensions to disabled Union veterans before the Civil War ended in April 1865. By 1890 its pension programs included any Union veteran who had fought in the Civil War, regardless of his financial means, as well as surviving family members, including mothers, fathers, brothers, and sisters. Union veterans did not hesitate to "wave the bloody shirt" in their attempts to liberalize pension laws. Pension programs for Confederate veterans were much slower to develop. Lacking any higher organization, each southern state assumed the responsibility of caring for disabled and/or indigent Confederate veterans and widows. Texas began paying Confederate pensions in 1899, Georgia in 1888 and Virginia in 1889. Unlike Texas, Georgia and Virginia provided artificial limbs for their veterans long before they started paying pensions. At the time of his enlistment in the 1860s, the typical future pensioner was twenty-five years of age, and fewer than half were married heads of households. Very few could be considered wealthy and most were employed in agriculture. The pensioners of Georgia, Texas, and Virginia were remarkably similar, although there were some differences in nativity and marital status. They were all elderly and needy by the time they asked …
Date:
December 2004
Creator:
Wilson, Mary L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Survey of Texas Public Universities and University Systems Involvement in State Public Policy Making
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This study investigated the perceptions of influential relationships between Texas public university presidents, university system chancellors, and state legislators. The study's purpose was to examine Texas public universities engagement in lobbying type behaviors and whether public policy is affected through interaction and communication with legislative leaders. Moreover, of importance for this study was to identifying if Texas public universities actively work to influence the Texas legislature and if lobbying behavior exists whether or not that behavior influences public policy formation within the Texas legislative process. Lastly, this study focused on perceptions dealing with the Texas statute prohibiting state governmental agencies, including public universities and university systems, from influencing legislation through use of state funds. The study was conducted in the winter of 2003 and had 29 president / chancellor respondents and 88 legislator respondents. Three survey instruments were developed by the researcher to determine Texas public university president, system chancellor, and state legislator perceptions and attitudes concerning lobbying type activities, influence, and state statute compliance. Data reported consist of percentages, t-Test of significance, and Cohen's d effect size measure. Results from the study show agreement between the groups in areas of activities utilized to influence the legislative process and actual …
Date:
August 2004
Creator:
Wolf, David Fletcher
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Transcription of Op. 94 Morceau de Concert, by Camille Saint-Saëns For Solo Bass Trombone and Brass Ensemble
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The transcription is an addition to the repertoire for brass ensemble and bass trombone. Consideration is given to the nineteenth-century orchestration treatises of Berlioz and Strauss as well as the twentieth-century texts of Erik Leidzén, Walter Piston, and Samuel Adler. The transcription process is shaped by the principles of these writers. The score is contained in the appendix.
Date:
May 2001
Creator:
Woods, Christopher P.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Caregiving in Later Life: A Contextual Approach to the Provision of Care
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Guided by the life course perspective, this study examined the frequency of caregiving provided by older adults to kin and non-kin. A telephone survey produced a random sample of adults 60 years of age and older, which was predominantly White, with higher income and education levels (n = 278). Bivariate and multivariate analyses tested the impact of demographic characteristics and other variables, conceptualized as physical, human, and social capital, on the frequency of caregiving. Gender, age, health, limitations, education, income, household composition, social contact, and reciprocity were analyzed in multinomial logistic regressions. Caregiving was defined as care provided to sick or disabled persons, with frequency of providing care classified as often, sometimes, and never. The majority of older adults provided at least some care to others over a one-year period, with almost one-third doing so often and only one-quarter never doing so. Most provided care to more than one person, with over one-quarter providing care to multiple friends only. Age failed to predict caregiving involvement when physical and social capital variables were considered. The odds of often providing care are higher for women, although gender did not predict those who never provided care. Having at least some college only significantly …
Date:
August 2003
Creator:
Worthen, Laura T.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Conformational Studies of Myosin and Actin with Calibrated Resonance Energy Transfer
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Resonance energy transfer was employed to study the conformational changes of actomyosin during ATP hydrolysis. To calibrate the technique, the parameters for resonance energy transfer were defined. With conformational searching algorithms to predict probe orientation, the distances measured by resonance energy transfer are highly consistent with the atomic models, which verified the accuracy and feasibility of resonance energy transfer for structural studies of proteins and oligonucleotides. To study intramyosin distances, resonance energy transfer probes were attached to skeletal myosin's nucleotide site, subfragment-2, and regulatory light chain to examine nucleotide analog-induced structural transitions. The distances between the three positions were measured in the presence of different nucleotide analogs. No distance change was considered to be statistically significant. The measured distance between the regulatory light chain and nucleotide site was consistent with either the atomic model of skeletal myosin subfragment-1 or an average of the three models claimed for different ATP hydrolysis states, which suggested that the neck region was flexible in solution. To examine the participation of actin in the powerstroke process, resonance energy transfer between different sites on actin and myosin was measured in the presence of nucleotide analogs. The efficiencies of energy transfer between myosin catalytic domain and actin …
Date:
May 2000
Creator:
Xu, Jin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Risk Assessment of Aviation Security and Evaluation of Aviation Security Policies
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Comprising many airplanes, airports, aircrew, and employees, aviation industry is a large sector that is very vulnerable to attacks, whether it is from terrorists or criminals. Aviation history is fraught with examples of airport bombings, hijackings, and sabotage terrorist attacks. The most destructive of which is the tragedy of September 11, 2001, the cornerstone of today's aviation security policies. This study uses risk assessment tools to determine the dimensions of danger and threats against the aviation industry and addresses how vulnerable the aviation sector is. After vulnerabilities and threats are examined, possible impacts of attacks against the aviation security are discussed. This study also explores the pre and post September 11 policies that governments and policy makers develop to reduce risks in aviation sector. In addition, it discusses weaknesses and strengths of these policies which surfaced during the implementations. Finally, this study proposes some recommendations based on vulnerabilities and threats of aviation security.
Date:
August 2005
Creator:
Yalcinkaya, Ramazan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Police Officer Burnout: An Examination of Officer Stress, the Policing Subculture and the Advantages of Family Counseling
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The work of a police officer is stressful and could potentially lead to burnout. As a result, a variety of reactions may occur which include, cynicism, abuse of authority, and in extreme cases suicide. One method which has been proven to be effective in treating officer stress is counseling; however, because of the policing subculture the opportunity to seek counseling has been ignored. In order to successfully manage officer stress, the subculture must be dealt with. Additionally, the officers' family must also be acknowledged as being affected by officer burnout. Counseling services must be made available to the officer's family and through training they can become a source of support instead of an added source of stress to the officer.
Date:
December 2004
Creator:
Yanez, Luiz
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Peptide-based hidden Markov model for peptide fingerprint mapping.
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Peptide mass fingerprinting (PMF) was the first automated method for protein identification in proteomics, and it remains in common usage today because of its simplicity and the low equipment costs for generating fingerprints. However, one of the problems with PMF is its limited specificity and sensitivity in protein identification. Here I present a method that shows potential to significantly enhance the accuracy of peptide mass fingerprinting, using a machine learning approach based on a hidden Markov model (HMM). This method is applied to improve differentiation of real protein matches from those that occur by chance. The system was trained using 300 examples of combined real and false-positive protein identification results, and 10-fold cross-validation applied to assess model discrimination. The model can achieve 93% accuracy in distinguishing correct and real protein identification results versus false-positive matches. The receiver operating characteristic (ROC) curve area for the best model was 0.833.
Date:
December 2004
Creator:
Yang, Dongmei
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Case Study of Leftist Terrorism in Turkey
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Change in government has characterized the development of most nations. Sometimes this change has been marked by continued evolution, in a peaceful attempt to move forward. Other times, change has been fraught with violent revolution and terrorism. This process has been the subject of much debate by political scientists and economic philosophers. Today, Turkey suffers from continued threats to its government through violent acts of terrorism conducted by various groups, expressing ideologies of leftist and rightist organizations, as well as ethnic and religious extremists. This thesis examines DHKP/C as the primary leftist revolutionary group effecting Turkey, exploring its historical background in Europe and the Middle East, as well as its philosophical link to Marxism. Further, this treatise discusses the implication of revolution and terrorism expressed by DHKP/C; and explores innovative and peaceful solutions, strategies, and techniques to be used by the police forces of Turkey in combating this group
Date:
August 2001
Creator:
Yayla, Ahmet
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Terrorism as a social information entity: A model for early intervention.
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This dissertation studies different social aspects of terrorists and terrorist organizations in an effort to better deal with terrorism, especially in the long run. The researcher, who also worked as a Police Captain at Turkish National Police Anti-Terrorism Department, seeks solutions to today's global problem by studying both literature and a Delphi examination of a survey of 1070 imprisoned terrorists. The research questions include questions such as "What are the reasons behind terrorism?", "Why does terrorism occur?", "What ideologies provide the framework for terrorist violence?, "Why do some individuals become terrorists and others do not?" and "Under what conditions will terrorists end their violence?" The results of the study presents the complexity of the terrorism problem as a social experience and impossibility of a single solution or remedy for the global problem of terrorism. The researcher through his examination of the findings of the data, presented that terrorism is a social phenomenon with criminal consequences that needs to be dealt by means of two dimensional approaches. The first is the social dimension of terrorism and the second is the criminal dimension of terrorism. Based on this, the researcher constructed a conceptual model which addresses both of these dimensions under the …
Date:
August 2005
Creator:
Yayla, Ahmet
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Chen Yi and Her Choral Music: A Study of the Composer's Ideal of Fusing Chinese Music and Modern Western Choral Traditions
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Chen Yi's music is well accepted and recognized nationally and internationally through an increasing number of commissions and performances. Major symphony orchestras, choruses, institutions and companies request her compositions on many occasions in order to increase understanding and exploration of Chinese influences on western classical idioms. This study provides the first detailed discussion of her compositional mastery and her fusion of Chinese music with the language of western choral traditions. Chen Yi's reputation as a prominent orchestral composer does not restrain her passion to apply instrumental techniques and materials to her quality choral compositions. This study focuses on (1) how hardship and various life experiences during the ten-year Cultural Revolution shaped Chen Yi's musical inspirations; (2) how the influences of major musical genres, such as traditional Chinese folksong, jingju, model play, 19th-20th century nationalism, impressionism, and serialism are consolidated in her kaleidoscopic compositional techniques; and (3) the application of Chinese languages, pedagogical concepts, and extra-musical elements, such as Chinese poems, paintings, and calligraphies, revealed in her original, intelligent and resourceful choral creations.
Date:
December 2006
Creator:
Yeung, Hin-Kei
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Characterization of cDNA and Genomic Clones for a Palmitoyl-acyl Carrier Protein Thioesterase and an Osmotin-Like PR5 Protein in Gossypium Hirsutum.
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Putative cotton cDNA clones and cognate genomic clones for a palmitoyl-acyl carrier protein (ACP) thioesterase (PATE) and an osmotin-like pathogenesis-related 5 (PR5) protein have been isolated and characterized. PATE is a class B fatty acid thioesterase with specificity for saturated long-chain fatty acids such as palmitate, and is implicated as a key enzyme to be targeted for regulation of fatty acid synthesis in order to alter cotton seed oil profiles. A nearly full-length 1.7-kb cDNA clone was isolated using a hybridization probe derived from an Arabidopsis PATE cDNA clone designated TE 3-2. A 17-kb genomic segment encompassing the PATE gene was also isolated, which has six exons and five introns with high sequence identity with other FatB cDNA/gene sequences. The deduced PATE preprotein amino acid sequence of 413 residues has putative signal sequences for targeting to the chloroplast stroma. PR5 proteins called osmotins are made in response to fungal pathogen stress or osmotic stress (water deprivation or salt exposure). Osmotins may actually form pores in fungal membranes, leading to osmotic rupture and destruction of the fungal cells. A cotton osmotin-like PR5 cDNA insert of 1,052 base-pairs was isolated and shown to encode a preprotein of 242 amino acids and is …
Date:
May 2002
Creator:
Yoder, David W.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Effects of Timed Readings on Recall and Comprehension in a Child with Asperger's Syndrome.
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The effects of timed readings on recall and comprehension in a child with Asperger's syndrome were examined by employing a multiple-baseline design across two books with reversals. Recall timings consisted of the student's free-say compilation of what she just read. Comprehension tests consisted of the participant's answers to predetermined questions after her recall period. No consequences or feedback was given during any of the conditions. Results indicate that, initially, as the time required to read decreased, the number of unrelated words during the recall period for the two books also decreased. Related words were not as affected. Scores on comprehension tests were high. There was, however, little correspondence between the participant's recall words and the main ideas answered correctly in the comprehension test.
Date:
December 2005
Creator:
Young, Christina A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Juvenile Justice Sentencing: Are There Alternatives?
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Research indicates that states have implemented juvenile justice reforms to enact harsher punishments, to transfer greater numbers and younger juvenile offenders to adult criminal court, and to restrict discretion of the juvenile court judges. Social science studies have found that harsher punishments, transfers to adult criminal court and other measures do not work, but that comprehensive approaches which address the numerous major factors contributing to juvenile offending have been successful. This study examined the legal status of the juvenile justice system by focusing upon ten diverse sample states and analyzed the social science research on factors contributing to juvenile offending and on prevention, treatment, and rehabilitation approaches. The study was accomplished by legal research, qualitative social science research, and analysis of both. Findings indicated: a) state statutes require and allow adult punishment of juvenile offenders, transfer of juvenile offenders to adult criminal court, and direct filing of charges against juveniles in adult criminal court; most states begin these proceedings at age 14, some have no age minimum; b) social science research indicates numerous factors contribute to juvenile offending with most of the factors categorized into the major factors of early antisocial behavior, deviant peers, parents and family, sociomoral reasoning, biological …
Date:
December 2000
Creator:
Youngblood, Michelle K.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Electrochemical Synthesis and Characterization of Inorganic Materials from Aqueous Solutions
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The dissertation consists of the following three sections: 1. Hydroxyapatite (HA) coatings. In this work, we deposited HA precursor films from weak basic electrolytic solution (pH= 8-9) via an electrochemical approach; the deposits were changed into crystallite coatings of hydroxyapatite by sintering at specific temperatures (600-800 ºC). The formed coatings were mainly characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). XRD patterns show well-defined peaks of HA when sintered under vacuum conditions. FTIR measurements indicate the existence of hydroxyl groups, which were confirmed by the characteristic intensity of the stretching and bending bands at ~3575 and ~630 cm-1, respectively. The SEM shows an adhesive, crack free morphology for the double-layer coating surface of the samples sintered in a vacuum furnace. 2. Silver/polymer/clay nanocomposites. Silver nanoparticles were prepared in layered clay mineral (montmorillonite)/polymer (PVP: poly (vinyl pyrrolidone)) suspension by an electrochemical approach. The silver particles formed in the bulk suspension were stabilized by the PVP and partially exfoliated clay platelets, which acted as protective colloids to prevent coagulation of silver nanoparticles together. The synthesized silver nanoparticles/montmorillonite/PVP composite was characterized and identified by XRD, SEM, and TEM (transmission electron microscopy) measurements. 3. Ce-doped lead …
Date:
December 2006
Creator:
Yuan, Qiuhua
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Influence of executive function on medication adherence in neurologically impaired and non-impaired elderly.
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Medication non-compliance has become one of the most prevalent reasons for hospitalization and doctor's visits by the elderly. As the elderly population is more likely to have decreased cognitive abilities, it is suggested that neuropsychological factors, especially executive function, are more influential in medication non-compliance than once thought. This study looked at executive function performance on a traditional battery of neuropsychological tests, self-report of perceived ability to perform executive function tasks, and the newly developed Pillbox Test, a performance based IADL measure. The Pillbox Test is designed to replicate a type of medication-management specific IADL as a means to asses executive function. Standard executive function measures only tap a portion of executive function, but it is believed that the Pillbox Test incorporates all four theoretical domains of executive function. The multiple measures of executive function performance were compared in three prevalent subgroups of the elderly population (mixed neurological group, cardiac medical-control group, and healthy community-control group). Results found significant differences, where the community-control and cardiac groups outperformed the mixed neurological group on the large majority of executive function tasks. Smaller differences were also noted between the community-control and cardiac groups and between the cardiac and mixed neurological groups. Together, these …
Date:
August 2006
Creator:
Zartman, Andrea Leigh
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The impact of leisure travelers' characteristics on hotel Website attributes preference.
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Travel is now the largest online business-to-consumer product in the United States. Online hotel bookings are the second largest segment of online travel. Leisure travelers online spending will increase dramatically from 2002 to 2007. However, a majority of hospitality companies do not currently take advantage of the Internet as the cheapest and most efficient distribution medium. The purpose of this study examined leisure travelers' demographic and psychographic characteristics, online booking and travel frequency that influence travelers' desired hotel Website features and functions. The results found out that demographics (gender, occupation, and ethnicity), and psychographics (travel benefit sought), number of leisure travel trips per year, and number of online hotel bookings per year have impact on hotel Website attribute preferences.
Date:
December 2004
Creator:
Zhang, Li
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A social capital perspective on IT professionals' work behavior and attitude.
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Abstract Attracting and developing information technology (IT) professionals is one of the top concerns for companies. Although much research has been conducted about the job behavior and attitudes of IT professionals over the last three decades, findings are inconclusive and contradictory. This suggests that something may be missing in how we examine this phenomenon. Most of this research is drawn from theories of motivation, very little examines the effect of social relationships on IT professionals' behavior and attitude. Yet, social capital theory suggests that job behavior and attitude may be greatly influenced by these relationships. This suggests that IT professionals' social capital warrants empirical examination. The primary research question that this dissertation addresses is how social capital affects IT professionals' work attitude and behavior including job satisfaction, organizational citizenship behavior, job performance and turnover intention. The research model in this dissertation examines the influence of three aspects of social capital on IT professionals' job attitude and work behavior: tie strength, the number of ties and the structural holes. Data were collected from 129 IT professionals from a range of jobs, organizations and industries. Results indicate that tie strength in the organization of an IT professional is positively related to job …
Date:
August 2006
Creator:
Zhang, Lixuan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The structure and function of troponin T upon metal ion binding and the detection of nucleic acid sequence variations.
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Numerous troponin T (TnT) isoforms are generated by alternative RNA splicing primarily in its NH2-terminal hypervariable region, but the functions of these isoforms are not completely understood. In this dissertation work, calcium and terbium binding behavior of several forms of TnT were investigated by spectroscopic and radioactive techniques. Chicken breast muscle TnT binds calcium and terbium through its NH2-terminal Tx motif (HEEAH)n with high affinity (10-6 mM) and fast on-rate (106 - 107 M-1 s-1). Chicken leg muscle TnT and a human cardiac TnT NH2-terminal fragment, which both lack the Tx motif on their NH2-terminal regions, do not have affinities for calcium in the physiological range. Computational predictions on TnT N47 suggest that the TnT NH2-terminal region might fold into an elongated structure with at least one high affinity metal ion binding pocket comprised primarily of the Tx motif sequence and several lower affinity binding sites. In addition, calcium binding to TnT N47 might alter its conformation and flexibility. Luminescence resonance energy transfer measurements and other experimental observations are consistent with the computational predictions suggesting the computational simulated atomic model is reasonable. TnT mutations are responsible for 15% of familiar hypertrophic cardiomyopathy (FHC) cases with a phenotype of relatively mild …
Date:
May 2005
Creator:
Zhang, Zhiling
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Study of Conductance Quantization by Cross-Wire Junction
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The thesis studied quantized conductance in nanocontacts formed between two thin gold wires with one of the wires coated by alkainthiol self assembly monolayers (SAM), by using the cross-wire junction. Using the Lorenz force as the driving force, we can bring the two wires in contact in a controlled manner. We observed conductance with steps of 2e2 / h. The conductance plateaus last several seconds. The stability of the junction is attributed to the fact that the coating of SAM improves the stability and capability of the formed contact.
Date:
May 2004
Creator:
Zheng, Tao
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Memory Management and Garbage Collection Algorithms for Java-Based Prolog
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Implementing a Prolog Runtime System in a language like Java which provides its own automatic memory management and safety features such as built--in index checking and array initialization requires a consistent approach to memory management based on a simple ultimate goal: minimizing total memory management time and extra space involved. The total memory management time for Jinni is made up of garbage collection time both for Java and Jinni itself. Extra space is usually requested at Jinni's garbage collection. This goal motivates us to find a simple and practical garbage collection algorithm and implementation for our Prolog engine. In this thesis we survey various algorithms already proposed and offer our own contribution to the study of garbage collection by improvements and optimizations for some classic algorithms. We implemented these algorithms based on the dynamic array algorithm for an all--dynamic Prolog engine (JINNI 2000). The comparisons of our implementations versus the originally proposed algorithm allow us to draw informative conclusions on their theoretical complexity model and their empirical effectiveness.
Date:
August 2001
Creator:
Zhou, Qinan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library