This study was designed to identify and examine certain individual factors that contribute to Louisiana Technical College (LTC) student success in Web-based developmental education (DE) courses among the academically underprepared students. The independent variables (IV) selected for this study included students' prior academic preparation (PAP), comfort with technology (CWT), interaction with faculty (IWF), and motivation (MOT). The dependent variable (DV) was students’ course success measured by their mid-term scores (MTSCORE). Research methodologies included correlational statistics using multiple and logistic regression, and t-test for group comparisons. Data were gathered through an online survey using SurveyMonkey.com from the DE students at LTC that use PLATO Web Learning Network using a survey instrument (WBLSS) designed by the researcher for this study. The study found two predictor variables, IWF and PAP, to be statistically significant and two variables, MOT and CWT, statistically not significant. Based on the IVs' combined identified relationship with the DV, the researcher designed a predictive model of LTC students' course success in Web-based DE courses. The model employed in this study explained 17% of the variance in the MTSCORE. For many academically underprepared students at LTC, college and career success first depend on their success in the DE courses. Therefore, identifying individual characteristics related to course success is the key to building academic success models for underprepared students at two-year colleges like the LTC.

The Third Chapter: The aim of this research is to study individual choices of precau- tionary saving and long-term care spending when an individual faces the uncertainty of after-retirement health shocks. To do this, an improved two-period life-cycle model is employed. This paper also explores how individual choice affects economic development and capital accumulation in an overlapping generation economy. The study shows that the rise in the possibility of getting after-retirement health shocks will result to an increase in long-term care expenditure and the level of precautionary saving. The steady state will also increase in this case. The Fourth Chapter: The increasing and intensifying long-term care (LTC) demand brings great financial pressures for both governments and individuals. From the public perspective, the underlying economic question is how adequate real resources can be re- distributed to support long-term care need and how efficient the policies targeting is. As many LTC policies are accessed through means tests, individuals saving behaviour can be affected. This paper examines and compares the welfare effects that different means- tested policies have on individuals. We did this by embedding life-cycle models with after-retirement health shocks. Means-tested policies of long-term care, one with a top- up choice, and one without, were then simulated. The results show that the means test regime with a top-up option can bring a higher social welfare. Under this scheme, a higher means test threshold can decrease societys dependency on a social benefit system and increase social welfare. The Fifth Chapter: Attendance Allowance and Disability Living Allowance are the dis- ability cash benefits provided for people who are over 65 in the U.K. As the government plans to divert more public resource from these benefits to means-tested local care ser- vices, it is important to understand the effects and targeting of these cash benefits first. Using the survey data from English Longitudinal Study of Ageing, this study examines the relationship between the receipt of disability cash benefits and recipients’ character- istics among those who are over 65 in England. Although income is not a key factor to decide on the receipt of the benefits in the criteria, the results show that it still has a self- selection process where the benefits are given to those who are both most in need and on low incomes.

Le durcissement des normes d'émission, tout autant que l'impératif d'économie,poussent à étudier de nouveaux modes de combustion pour les moteurs. L'autoallumage decharges homogènes à basse température offre de bonnes perspectives quant au rejet de NOx,suies, et CO2. Cependant son control reste délicat, car il est extrêmement sensible à latempérature et la cinétique de l'hydrocarbure. L'assistance par plasma hors-équilibre pourraitfournir une solution. Les expériences sont menées dans une MCR avec des mélanges pauvresd'isooctane/air et un prototype d'allumeur Renault. La combustion obtenue identifiée commeSICI se déroule en deux phases: la propagation d'une flamme comprime les gaz restantjusqu'à leur autoallumage. Le réchauffement du système expérimental est intégré dans leprotocole d'exploitation, afin de quantifier l'effet SICI relativement à l'autoallumage pur.L'effet du plasma semble avant tout dépendre de l'énergie déposée, bien qu'il convergerapidement, quel que soit l'avance du déclenchement. Le comportement asymptotique à hauteénergie s'explique par la thermalisation des filaments, soulignée par comparaison avec l'effetSICI d'un arc classique. A l'inverse, le seuil minimal d'énergie nécessaire semble lié à lacapacité à générer un noyau de flamme viable, rapprochant le phénomène d'un problèmeclassique d'allumage en conditions difficiles. La propagation de la flamme détermine ledéclenchement de l'autoallumage selon une caractéristique linéaire particulièrementremarquable, car indépendante des conditions thermodynamiques du mélange. L'existenced'une flamme froide est mise en avant par des acquisitions de PLIF formaldéhyde. Lapréréaction semble accélérer la propagation du front de flamme.

No description available.

No description available.

Diesel engine emissions of oxides of nitrogen and particulate matter can be reduced simultaneously through the use of high levels of exhaust gas recirculation (EGR) to achieve low temperature combustion (LTC). Although the potential benefits of diesel LTC are clear, the main challenges to its practical implementation are the requirement of EGR levels that can exceed 60%, high fuel consumption, and high unburned hydrocarbon and carbon monoxide emissions. These limit the application of LTC to medium loads. In order to implement the LTC strategy in a passenger vehicle engine, a transition to conventional diesel operation is required to satisfy the expected high load demands on the engine. The investigation presented in this thesis was therefore aimed at improving the viability of the high-EGR LTC strategy for steady-state and transient operation. An experimental investigation was carried out on a single cylinder high-speed direct injection diesel engine. This thesis presents research on engine in-cylinder performance and engine-out gaseous and particulate emissions at operating conditions (i.e. EGR rate, intake pressure, fuel quantity, injection pressure) likely to be encountered by an engine during transient and steady-state operation. At selected operating points, further investigation in terms of in-cylinder spray and combustion visualization, flame temperature and soot concentration measurements provided deeper insight into the combustion and emissions phenomena. Increased intake pressure at single injection high-EGR LTC operation was investigated as a strategy to reduce the emissions of partial combustion by-products and to improve fuel economy. The higher intake pressure, although effective in reducing partial combustion by-products emissions and improving fuel economy, increased the EGR requirement to achieve LTC. A split fuel injection strategy with advanced injection timing on the other hand was effective in reducing the EGR requirement for LTC from 62% with single injection to 52% with split injections at 120 kPa (absolute) intake pressure. Unburned hydrocarbon emissions and fuel economy were particularly sensitive to intake oxygen mass fraction, and injection and dwell timings with the split injection strategy. In-cylinder soot formation and oxidation mechanisms with the split injection strategy were found to be significantly different from the single injection high-EGR LTC case. Transient simulation of an engine during combustion mode transition identified engine operating parameters on a cycle-by-cycle basis. Steady-state investigation of these test conditions provided significant insight into the combustion conditions and their effect on emissions and performance. The results from this thesis demonstrated the importance of optimizing both the air handling system performance and the fuel injection system during engine transients. The increased emissions and impaired performance due to slow response of the EGR and turbocharger systems during transitions to and from LTC modes can in part be mitigated through split injections optimized for the specific transient point. This provides a clear direction for engine developers to pursue in optimizing engine calibration when running with LTC-conventional diesel dual-mode strategies.

With the aging of our population and the higher risk of chronic illness and disability with age, more and more family members may be faced with the experience of having a relative transition into a long-term care (LTC) home. This reality necessitates greater understanding of family care partner needs to ensure wellness throughout their caring career. Using participatory action research, notions of wellness were explored for family partners in care with relatives residing in LTC homes. Using two LTC homes from a privately owned company called Specialty Care, ten family members were interviewed, followed by one focus group at each of the two LTC homes. Three major themes were revealed, each with several sub themes: (1) understanding wellness amidst challenges to keep a sense of wellness in life; (2) self-appraisal: becoming aware of personal beliefs and perceptions that influence wellness; and (3) assessing LTC homes and their influence on the experience of wellness. We not only revealed more about wellness and how it is experienced in the caring context, we also discovered leisure’s role in maintaining wellness and how embedded leisure’s influence is on the various aspects of wellness that family partners in care experience. Relationship-centred care is a framework we used to guide this study. It highlights the importance of family member needs, along with the needs of the residents and staff. With our enhanced understanding of family care partner needs, recommendations were made to the Specialty Care communities so they can work together to ensure optimal wellness is maintained for all parties, including family partners in care.

Cluster-based information retrieval systems often use a similarity measure to compute the association among text documents. In this thesis, we focus on a class of similarity measures named Query-Sensitive Similarity (QSS) measures. Recent studies have shown QSS measures to positively influence the outcome of a clustering procedure. These studies have used QSS measures in conjunction with the ltc term-weighting scheme. Several term-weighting schemes have superseded the ltc term-weighing scheme and demonstrated better retrieval performance relative to the latter. We test whether introducing one of these schemes, INQUERY, will offer any benefit over the ltc scheme when used in the context of QSS measures. The testing procedure uses the Nearest Neighbor (NN) test to quantify the clustering effectiveness of QSS measures and the corresponding term-weighting scheme. The NN tests are applied on certain standard test document collections and the results are tested for statistical significance. On analyzing results of the NN test relative to those obtained for the ltc scheme, we find several instances where the INQUERY scheme improves the clustering effectiveness of QSS measures. To be able to apply the NN test, we designed a software test framework, Ferret, by complementing the features provided by dtSearch, a search engine. The test framework automates the generation of NN coefficients by processing standard test document collection data. We provide an insight into the construction and working of the Ferret test framework.

With the aging of our population and the higher risk of chronic illness and disability with age, more and more family members may be faced with the experience of having a relative transition into a long-term care (LTC) home. This reality necessitates greater understanding of family care partner needs to ensure wellness throughout their caring career. Using participatory action research, notions of wellness were explored for family partners in care with relatives residing in LTC homes. Using two LTC homes from a privately owned company called Specialty Care, ten family members were interviewed, followed by one focus group at each of the two LTC homes. Three major themes were revealed, each with several sub themes: (1) understanding wellness amidst challenges to keep a sense of wellness in life; (2) self-appraisal: becoming aware of personal beliefs and perceptions that influence wellness; and (3) assessing LTC homes and their influence on the experience of wellness. We not only revealed more about wellness and how it is experienced in the caring context, we also discovered leisure’s role in maintaining wellness and how embedded leisure’s influence is on the various aspects of wellness that family partners in care experience. Relationship-centred care is a framework we used to guide this study. It highlights the importance of family member needs, along with the needs of the residents and staff. With our enhanced understanding of family care partner needs, recommendations were made to the Specialty Care communities so they can work together to ensure optimal wellness is maintained for all parties, including family partners in care.

Little is known regarding registered nurse (RN) information management practice in long-term care (LTC) settings. This study identifies LTC RNs’ information management practice and needs, which are important for designing and implementing health information technology (HIT) in LTC settings. Methods: This descriptive qualitative study combines direct observations and semi-structured interviews, conducted at Alberta’s LTC facilities between May 2014 and August 2015. The constant comparative method of joint coding was used for data analysis. Results: Nine RNs from six nursing homes participated in the study. Based on the RNs’ existing information management system requirements, a graphic information flow model was constructed. Conclusion: This baseline study identified key components of LTC RNs’ information management system. The information flow model may assist HIT developers with future design and development of HIT solutions for LTCs, serve as a communication tool between RNs and developers to refine requirements and support further LTC HIT research. / Graduate