• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 6
  • 5
  • Tagged with
  • 16
  • 16
  • 6
  • 6
  • 6
  • 6
  • 5
  • 4
  • 4
  • 4
  • 4
  • 4
  • 4
  • 4
  • 3
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A study of freeze denaturation of proteins

Chen, Ya-Huei January 2000 (has links)
No description available.
2

An investigation of the pattern scaling technique for describing future climates

Mitchell, Timothy D. January 2001 (has links)
No description available.
3

An exploration of the effects of cognitive thinking and affect in attitude judgments

Siah, Poh-Chua January 1996 (has links)
No description available.
4

A Case Study in Revolutionary Change: From High School to Missionary Training Center

Cates, Shawn R. 07 August 2020 (has links)
This article focuses on a case study in revolutionary change. A private school in Mexico City that had functioned for 49 years under the educational arm of The Church of Jesus Christ of Latter-day Saints underwent a change in mission, purpose, structure, function, and administration in eight months. Research about organizational change contains many conceptual models and principles intended to guide an organization through large-scale change. However, this change occurred without any strict reliance on a specific change model. This qualitative study is directed at empirically discovering what main factors led to success rather than relying on anecdotal assumptions. The change is separated into three major phases: a five-month announcement and planning period, the three-month start-up phase, and a year-long stabilizing period. Data sources included 14 interviews with people who participated in the change, a focus group with managers, and archival documents related to the functioning of the organization during these phases. Six prominent themes came from the data analysis related to change success factors. The most salient was that individual employee attitude's, beliefs and efforts were the main perceived contributing success factor. Others include continuous planning at multiple levels in the organization, the major difficulty yet positive feeling about the change, how different work teams formed and worked together; the role of experienced leaders, the support given to employees in their responsibilities, and sufficient resourcing. Future research should look at the effect of culture clashes when multiple teams are combined under a new vision and purpose and how these cultural differences are moderated by the relationship between organizational factors and employee factors.
5

Phase change thermal enery storage for the thermal control of large thermally lightweight indoor spaces

Gowreesunker, Baboo Lesh Singh January 2013 (has links)
Energy storage using Phase Change Materials (PCMs) offers the advantage of higher heat capacity at specific temperature ranges, compared to single phase storage. Incorporating PCMs in lightweight buildings can therefore improve the thermal mass, and reduce indoor temperature fluctuations and energy demand. Large atrium buildings, such as Airport terminal spaces, are typically thermally lightweight structures, with large open indoor spaces, large glazed envelopes, high ceilings and non-uniform internal heat gains. The Heating, Ventilation and Air-Conditioning (HVAC) systems constitute a major portion of the overall energy demand of such buildings. This study presented a case study of the energy saving potential of three different PCM systems (PCM floor tiles, PCM glazed envelope and a retrofitted PCM-HX system) in an airport terminal space. A quasi-dynamic coupled TRNSYS®-FLUENT® simulation approach was used to evaluate the energy performance of each PCM system in the space. FLUENT® simulated the indoor air-flow and PCM, whilst TRNSYS® simulated the HVAC system. Two novel PCM models were developed in FLUENT® as part of this study. The first model improved the phase change conduction model by accounting for hysteresis and non-linear enthalpy-temperature relationships, and was developed using data from Differential Scanning Calorimetry tests. This model was validated with data obtained in a custom-built test cell with different ambient and internal conditions. The second model analysed the impact of radiation on the phase change behaviour. It was developed using data from spectrophotometry tests, and was validated with data from a custom-built PCM-glazed unit. These developed phase change models were found to improve the prediction errors with respect to conventional models, and together with the enthalpy-porosity model, they were used to simulate the performance of the PCM systems in the airport terminal for different operating conditions. This study generally portrayed the benefits and flexibility of using the coupled simulation approach in evaluating the building performance with PCMs, and showed that employing PCMs in large, open and thermally lightweight spaces can be beneficial, depending on the configuration and mode of operation of the PCM system. The simulation results showed that the relative energy performance of the PCM systems relies mainly on the type and control of the system, the night recharge strategy, the latent heat capacity of the system, and the internal heat gain schedules. Semi-active systems provide more control flexibility and better energy performance than passive systems, and for the case of the airport terminal, the annual energy demands can be reduced when night ventilation of the PCM systems is not employed. The semi-active PCM-HX-8mm configuration without night ventilation, produced the highest annual energy and CO2 emissions savings of 38% and 23%, respectively, relative to a displacement conditioning (DC) system without PCM systems.
6

Changing Circumstances, Changing Outcomes?: Longitudinal Relations Between Family Income, Cumulative Risk Exposure, And Children’s Educational Success

Thomson, Dana January 2017 (has links)
Thesis advisor: Eric Dearing / Emerging research in developmental psychology and neuroscience suggests that childhood poverty is associated with high levels of exposure to multiple contextual risks, which cumulatively lead to persistent elevated stress levels that have a direct, as well an indirect (e.g., through parental processes), impact on child cognitive, academic, and socioemotional functioning (Evans & Kim, 2013). Such research has begun to change the way that scholars and practitioners envision the context of poverty, the persistence of the income-achievement gap, and the types of interventions that may be most effective in addressing disparities in children’s long-term educational success. However, research on the relations between poverty-associated stress and child outcomes is still in its infancy and many questions remain. In particular, it is unclear whether changing family economic circumstances matter, a question of concern for developmental science and public policy. Moreover, there is little work on moderators of relations between income, stress, and child outcomes, which could help identify factors that buffer children from the harm of stressful home environments. With longitudinal data from the Panel Study of Income Dynamics’ Child Development Supplement, the present study used fixed effects models to examine within-child associations between changes in family income, cumulative risk exposure (as measured by an index that includes a range of poverty-related stressors, such as economic strain, neighborhood crime, and physical and psychological home environments), and children’s cognitive, academic and socioemotional functioning. In addition, moderators of these associations were investigated in order to identify potential protective mechanisms and crucial levers for interventions and policy development. On the whole, findings were consistent with the cumulative stress model. On average, the estimated direct effects of changes in family income (i.e., prior to examining mediation or moderators) were not significant for changes in child outcomes. Yet, changes in income were, for the sample as a whole, indirectly related via changes in cumulative risk exposure: increases in income predicted decreases in cumulative risk exposure which, in turn, predicted improvements in achievement and declines in externalizing behavior. Additionally, these relations were moderated by child age, initial level of family income, and initial level of cumulative risk. / Thesis (PhD) — Boston College, 2017. / Submitted to: Boston College. Lynch School of Education. / Discipline: Counseling, Developmental and Educational Psychology.
7

An analysis of the implementation of the North Carolina Cooperative Extension Service's Performance Planning, Counseling, and Evaluation program using the Probability of Adoption of Change model

Jahn, Larry G. 14 August 2006 (has links)
The purpose of the study was to explain the proportion of the variance in the level of implementation of the Performance Planning, Counseling, and Evaluation (PPC&E) program that could be attributed to the nine Probability of Adoption of Change (PAC) model constructs. Level of implementation was operationally defined as the degree to which county directors implemented the many elements of the PPC&E program. The nine PAC model constructs included: advantage probability, championship, circumstances, idea comprehensibility, opposition, practicality, strategies, superintendency, and value compatibility. / Ph. D.
8

A aplicação conjunta de método de projeção das alterações no uso e ocupação do solo e de instrumentos de gestão ambiental: o caso de São Carlos (SP) / The joint application of projection methods of the alteration on land use and the environmental policy tools: the São Carlos (SP) case

Montaño, Marcelo 08 August 2005 (has links)
A integração do ferramental técnico-científico disponível com os diferentes instrumentos de política e gestão ambiental é essencial para a compatibilização das exigências impostas pelo desenvolvimento com a manutenção ou melhoria da qualidade ambiental e social e, também, para o equacionamento das demandas e dos interesses de cada setor envolvido no processo decisório. Assim, os modelos para a projeção das alterações no uso e ocupação do solo de um determinado território têm sido freqüentemente utilizados. A modelagem propicia a geração e a avaliação das informações para montagem de um panorama das possíveis alterações no uso do solo, considerando que as tendências identificadas para aquele território, num certo instante, sejam mantidas de modo a se desenvolverem de acordo com um determinado cenário projetado. O presente trabalho analisa a possibilidade de aplicação conjunta do método de projeção das alterações no uso e ocupação do solo e instrumentos de política ambiental, levando em conta os aspectos preventivos. Aplicado a uma porção do município de São Carlos (SP), o trabalho apresenta uma projeção para a expansão urbana para os anos de 2012 e 2019, considerando três cenários alternativos de ocupação territorial. Confrontando os resultados obtidos pela modelagem com a capacidade de suporte do meio para a implantação de empreendimentos urbanos - determinada a partir da elaboração de um zoneamento ambiental, verifica-se que, mantidas as tendências atuais, e para os três cenários de ocupação avaliados, a expansão urbana continuará avançando sobre áreas de baixa aptidão para a urbanização, permanecerá exercendo intensa pressão sobre os recursos hídricos e os fragmentos de vegetação nativa, caso não sejam adotadas medidas que modifiquem o atual padrão de ocupação do território. / To compatibilize the demands raised by development with the maintenance or improvement of the social and environmental quality, the integration among technical scientific tools and environmental management instruments is essential to solve the interests of each sector involved at the decision process. On this context are inserted land use and cover change models. The modelling permit the decision-making process to be done evaluating the consequences of possible alterations on land use, which can be identified considering the scenarios projected for the territory under certain circunstances. The presente work analyses the possibility of joint application of this technique and environmental policy tools considering preventive aspects. Allocated to a portion of the São Carlos (SP) municipality, the work projects urban growth for the years 2012 and 2019, considering three alternative scenarios of occupation. Confronting the results obtained by the model with the carrying capacity for the implementation of urban activities - determined from the elaboration of environmental zoning, is showed that, maintained the present tendencies, and for the scenarios evaluated, the urban growth will continue forward and towards the areas with low suitability. In the same way, the pressure over water resources and fragments of native vegetation will remains intense unless measures to modify the standards in occupation can be adopted.
9

A aplicação conjunta de método de projeção das alterações no uso e ocupação do solo e de instrumentos de gestão ambiental: o caso de São Carlos (SP) / The joint application of projection methods of the alteration on land use and the environmental policy tools: the São Carlos (SP) case

Marcelo Montaño 08 August 2005 (has links)
A integração do ferramental técnico-científico disponível com os diferentes instrumentos de política e gestão ambiental é essencial para a compatibilização das exigências impostas pelo desenvolvimento com a manutenção ou melhoria da qualidade ambiental e social e, também, para o equacionamento das demandas e dos interesses de cada setor envolvido no processo decisório. Assim, os modelos para a projeção das alterações no uso e ocupação do solo de um determinado território têm sido freqüentemente utilizados. A modelagem propicia a geração e a avaliação das informações para montagem de um panorama das possíveis alterações no uso do solo, considerando que as tendências identificadas para aquele território, num certo instante, sejam mantidas de modo a se desenvolverem de acordo com um determinado cenário projetado. O presente trabalho analisa a possibilidade de aplicação conjunta do método de projeção das alterações no uso e ocupação do solo e instrumentos de política ambiental, levando em conta os aspectos preventivos. Aplicado a uma porção do município de São Carlos (SP), o trabalho apresenta uma projeção para a expansão urbana para os anos de 2012 e 2019, considerando três cenários alternativos de ocupação territorial. Confrontando os resultados obtidos pela modelagem com a capacidade de suporte do meio para a implantação de empreendimentos urbanos - determinada a partir da elaboração de um zoneamento ambiental, verifica-se que, mantidas as tendências atuais, e para os três cenários de ocupação avaliados, a expansão urbana continuará avançando sobre áreas de baixa aptidão para a urbanização, permanecerá exercendo intensa pressão sobre os recursos hídricos e os fragmentos de vegetação nativa, caso não sejam adotadas medidas que modifiquem o atual padrão de ocupação do território. / To compatibilize the demands raised by development with the maintenance or improvement of the social and environmental quality, the integration among technical scientific tools and environmental management instruments is essential to solve the interests of each sector involved at the decision process. On this context are inserted land use and cover change models. The modelling permit the decision-making process to be done evaluating the consequences of possible alterations on land use, which can be identified considering the scenarios projected for the territory under certain circunstances. The presente work analyses the possibility of joint application of this technique and environmental policy tools considering preventive aspects. Allocated to a portion of the São Carlos (SP) municipality, the work projects urban growth for the years 2012 and 2019, considering three alternative scenarios of occupation. Confronting the results obtained by the model with the carrying capacity for the implementation of urban activities - determined from the elaboration of environmental zoning, is showed that, maintained the present tendencies, and for the scenarios evaluated, the urban growth will continue forward and towards the areas with low suitability. In the same way, the pressure over water resources and fragments of native vegetation will remains intense unless measures to modify the standards in occupation can be adopted.
10

Impact of Change Management on Employee Behavior in a University Administrative Office

Turner, Kendra M. 01 January 2017 (has links)
This qualitative case study focused on the effect of a system implementation upgrade on employees' job performance within a central administration department of a major research university in the Southern United States. Review of literature revealed a lack of a specific model or process for system implementation upgrades and its impact on employees' performance in a university administrative office. Guided by Kotter's research on change management models, the research questions examined the attitudes and behaviors of employees involved with the business process project. Data collection was through purposeful sampling and face-to-face interviews with 11 employees. Data were analyzed through pattern-matching technique. The findings were that employees initially felt positive about being a part of the business process project. During the project, employees actually experienced (a) a lack of training, which employees advised to management was very important to a new process; (b) no definitive assistance and a lack of communication for individual concerns; (c) management's increased job duties and responsibilities without increased income; and (d) feeling unvalued in employee meetings. The implications for social change include the potential for positive employee behavior in colleges and universities when management is considering a change model or process involving employees in a system implementation during organizational change.

Page generated in 0.0774 seconds