Academic literature on the topic 'Sink term'

Cette thèse porte sur le développement d'un ensemble d'outils numériques destinés à simuler différents aspects des interactions vagues-structure appliquées à l'exploitation des systèmes de récupération de l'énergie des vagues (SREV). Elle a été réalisée dans le cadre du projet ANR Monacorev (projet ANR11-MONU-018-01, 2012-2015).L'objectif est de pouvoir traiter la question des interactions à l'échelle d'une ferme de SREVs (≈ 1 km), et d'étudier l'impact d'une ou plusieurs fermes de SREVs à l'échelle régionale (≈ 10km) sur le champ de vague total. Des méthodes de modélisation et de simulation adaptées sont développées pour chacune de ces deux échelles. Jusqu'à présent, les interactions entre les SREVs étaient bien souvent étudiées en considérant que le fond était plat (l'influence d'un fond variable sur le champ de houle au niveau de la ferme étant alors jugé négligeable), ce qui permet de calculer facilement et rapidement le champ de vagues et les interactions grâce à l'utilisation de la théorie linéaire potentielle. Une application pratique de cette méthode est le calcul du rendement d'une ferme de SREVs, et l'optimisation de leurs positions relatives au sein d'un parc. Dans le cadre de la théorie linéaire, cette thèse propose une méthodologie de couplage originale entre un code de tenue à la mer (Aquaplus) et un code de propagation de la houle en zone côtière (Artemis), laquelle a été développée et qualifiée. Les simulations réalisées montrent que, pour une configuration de ferme de SREVs donnée, on ne peut pas toujours négliger les effets de la bathymétrie. Par exemple, la présence d'une plage de pente 10% au large d'une ferme de SREV peut modifier la hauteur des vagues de manière significative, et affecter ainsi le rendement de la ferme de manière significative par rapport au cas où le fond est uniformément plat. A l'échelle côtière régionale, il est aussi intéressant de simuler et prédire l'impact de fermes de SREVs sur le champ de vagues. Pour des raisons d'efficacité, une approche à phases moyennées de modélisation des vagues a été privilégiée, fondée sur le code spectral d'états de mer Tomawac. La représentation des effets d'un SREV à travers l'utilisation d'un terme puits (concept permettant de soustraire au spectre d'énergie d'état de mer local l'énergie correspondant à celle absorbée par le SREV), bien qu'incomplète du fait que les effets de radiation/diffraction ne sont pas pris en compte, a été étudiée et testée. Une nouvelle méthodologie prenant en compte ces effets dans un code spectral est présentée ici et testée, avec l'objectif de pallier à ces limitations. Les discussions sur la validité de deux approches permettent d'esquisser des pistes de développements ultérieurs pour la représentation des fermes de SREV à l'échelle régionale<br>This thesis focuses on the development of a set of numerical tools to simulate different aspects of the wave-body interactions applied to the exploitation of wave energy converters (WEC). It was conducted under the ANR Monacorev project (project-ANR11 MONU-018-01, 2012-2015).The objective is to address the issue of the interactions at the scale of a farm of WECs (≈ 1 km), and to study the impact of one or more WEC farms at the regional scale (≈ 10km ) on the total wave field. Modeling and simulation methods adapted for each of these two scales are developed. Until now, the interactions between WECs was often studied by considering that the bottom was flat (the influence of a variable bathymetry on the wave field at the farm site being considered to be negligible), allowing to easily and quickly calculate the wave field and interactions through the use of linear potential theory. A practical application of this method is the yield estimation for a WEC farm and the optimization of the WEC position within a park. In the framework of the linear theory, this thesis proposes an original coupling methodology between a seakeeping (Aquaplus) and a wave propagation code in coastal areas (Artemis), which was developed and qualified. Simulations show that, for a given WEC farm configuration, effects of the bathymetry cannot systematically ignored. For example, the presence of a 10% slope close to a WEC farm can significantly modify the wave height, and thus affect the performance of the farm by several percent compared to the case with a uniformly flat bottom. At the regional coastal scale, it is also interesting to simulate and predict the impact of WEC farms on the wave field. At this scale, for efficiency reasons, a phase-averaged simulation of waves was preferred, based on the sea state spectral code TOMAWAC. The representation of the effects of a WEC through the use of a sink-term (concept for subtracting the energy equivalent to that absorbed by the WEC to the sea state energy spectrum), though incomplete due to the fact that the scattering effects are not taken into account, has been studied and tested. A new methodology taking into account these effects in a spectral code is presented here and tested with the aim to overcome these limitations. Discussions on the validity of these approaches allow us to propose possible future developments for the modeling of WEC farm at the regional scale

Aims: The starting point of this study was the experience of great problems with persons on long-term sick leave in the county of Västerbotten. In order to illuminate the situation we designed a study of the actors most involved who dealt with persons on long-term sick leave. These actors were the medical doctors; the employers: the social insurance officials; and members of the board of social insurance and persons reporting on the cases to the board. One aim was to describe and analyse the situation for persons on sick leave. Another aim was to describe and analyse the perception of the role the different actors played when dealing with persons on long-term sick leave. The third aim was to describe and analyse the different actors' views of each other, and of the co-operation around the persons on long-term sick leave. Method and material: Interviews with persons on sick leave, employers, social insurance officials and medical doctors. Questionnaires were sent to persons on sick leave, doctors and the members of the board of social insurance and those reporting on the cases. The interviews were audio- taped and transcribed word by word. Coding and analysis of collected data was done simultaneously by performing new interviews, using an adjusted form of grounded theory with the purpose of trying to find patterns and contexts. The aim was to describe the subjective experiences of how the actors look upon their situation and their way of coping with it. Results: The interviews with the employers showed great differences in attitudes and ways of treating employees, which also led to different models for dealing with work environment, sickness absence and rehabilitation. We divided the employers into five different "ideal types". Two of them could be described as "well-functioning" with regard to rehabilitation, and three of them as "less well-functioning". A high degree of flexibility characterises the successful employer, and he also takes good care of his personnel. The good employer also co-operates with other actors. The employers that are not well-functioning are not engaged in making adjustments, and have little confidence in their staff; the unions within their field are weak. Interviews with medical doctors revealed that they felt lonely, and that the demands were frustrating to them. They also had feelings of losing the locus of control. The doctors showed lack of knowledge of the labour market and the social insurance legislation, which made their work harder. They experienced that their lack of time made sickness periods longer. Among the results from the interviews with social insurance officials can be mentioned that they had good knowledge about laws, but sometimes it was difficult to use their knowledge and methods due to lack of flexibility. They experienced feelings of loneliness and had great difficulty in making decisions. Co-operation with partners often did not work out - the officials did not demand so much of their co-actors. The results of the questionnaire directed towards the members of the board of social insurance and those who reported on the cases did not show statistically significant differences between the three counties. The members of the board had almost the same proposals for decision as those who reported on the cases. There were no significant differences between men and women in decision-making. As a whole the members of the board seemed to be skilled in their knowledge of how to use the social insurance legislation. The results of the interviews with persons on sick leave showed that those persons had difficulties in asking for help and support. They felt such loyalty to their employers that they did not ask for adjustments of working places when needed. At the same time they were disappointed that the employers were not sufficiently involved in making it possible to come back to work again. More than half of the respondents had not received enough support from the employers, the medical doctors or the social insurance officials. Most of them felt frustrated, with little or no hope for the future. The results of the questionnaire to persons on long-term sick leave showed that women took a greater responsibility for their own rehabilitation, while the employers showed an earlier interest in sick male employees than in sick female employees. The employers were also keener to adjust the working places for men than for women. Despite those factors, women more often met their employers than men did, and they also had a more positive attitude to social insurance officials and doctors than men had. People with longer education took greater responsibility for their rehabilitation than those with shorter education. Compared to older people, younger persons were more optimistic about their future health and work, and also expressed that work was not so stressful.<br>digitalisering@umu

Background: Results from various studies of Long-term Care (LTC) need in China have remained confusing with LTC rates ranging from 2.4% to 22%. Therefore, it has been difficult to ascertain LTC’s sustainability in China. Methods: 672 households with people aged 60+ in Haidian, Beijing, were successfully interviewed between June – August, 2011. interRAI – Home Care assessment tool and scales were used to identify LTC impairment, LTC services use and want, and LTC services drivers. Findings: If LTC need refers to LTC impairment, based on population of Haidian in 2010, it was estimated 3.7% or 14,000 persons aged 60+ in Haidian have LTC impairment. If LTC need refers to people’s use or want of LTC services, it was estimated 38.7% or 147,000 persons aged 60+ in Haidian used and wanted LTC services. In specific, 11.9% (45,000) used Community Care (CC), 6.7% (25,000) and 20.1% (77,000) wanted Residential Care and CC respectively. LTC impairment rate as identified by this study was lower than most of other LTC studies in China, probably due to varied impairment identification and measurement mechanisms. LTC impairment tended to be affected by social activity level (OR: Odds Ratio = 0.29), subjective environmental hazards (OR = 0.20) and poor self-rated health (OR = 2.00). In addition, as compared to their counterparts, respondents with LTC impairment tended to be older; with “fewer” education, social activity and good health practice; and “high” in caregiver stress, objective environmental hazards, behavioral problems and depressive symptoms. There was no statistically significant relationship between LTC impairment and LTC services use/want. For those who used/wanted LTC services, 95% had no LTC impairment. For those with LTC impairment, 54.2% used or wanted LTC services. As compared to their counterparts, respondents who used or wanted LTC services tended to be in more favorable conditions: younger, higher education, more income, living with others, socially active, good self-rated health and more good health practice. These people also tended to have fewer objective environmental hazards, caregiver stress, chronic conditions, behavioral problems, and depressive symptoms. Use of CC was driven by higher age (OR: Odds Ratio = 1.088), being female (OR = 0.268), higher education (OR = 0.260), higher income (OR =3.218), and more objective environmental hazards (OR = 2.522). CC want was driven by higher age (OR = 1.050), being female (OR = 0.625), higher education (OR = 0.348) and more depression (OR = 1.235). Good health practice was the only factor that affecting RC want (OR = 2.842). The overall Pseudo R^2 was 0.219. Implications: Better projection of LTC impairment and LTC services use/want via standardized assessment tool is needed in China. There is also a need to address the issue of mismatch in LTC impairment and services. This is to ensure allocation of LTC services is based on LTC impairment and not because of higher income or education.<br>published_or_final_version<br>Social Work and Social Administration<br>Doctoral<br>Doctor of Philosophy

Thesis (Ph. D.)--School of Nursing. University of Missouri--Kansas City, 2007.<br>"A dissertation in nursing." Advisor: Katharine Smith. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed Jan. 2, 2008. Includes bibliographical references (leaves 155-168). Online version of the print edition.

Have you ever heard a song that hasn’t played in years, and immediately recognize it? What cognitive processes determine this, and why does it seemingly happen to everyone? Using the Expectancy Theory of Music (Meyer, 1965) a working explanation for the possibility of why such strange phenomena exists is proposed. Based on expectancy, words and melody are processed together, and sung words are treated as part of the expected whole. In three experiments, memory was tested using same- different task. Each experiments investigates a different level of memory. Taking into account systematic uncertainty and the violation of expectancy when an unexpected appears, these experiments were able to be analyzed and studied in regards to their effects on memory. College students from the Claremont Colleges are to be randomly selected for this experiment. Findings should show a consistent interaction between melody and vocal sequences throughout each experiment.

La modélisation des transferts thermiques en écoulements diphasiques est l'une des pierres angulaires de l'étude de la sûreté des réacteurs nucléaires. À l'échelle du réacteur, elle repose sur des corrélations expérimentales. L'utilisation croissante de la mécanique des fluides numérique pour les études de sûreté renforce la demande d'expertise dans les outils de simulation, en particulier du point de vue de la modélisation. En soutien aux modèles moyennés à deux fluides, nous souhaitons apporter des informations de fermetures locales pour considérer la physique des transferts interfaciaux et les effets 3D. Pour cela, comme la résolution directe des équations de bilan locales par SND est trop coûteuse, nous souhaitons développer un outil de SGE diphasique pour modéliser les petites échelles turbulentes et les petites déformations interfaciales. Comme le changement de phase est à l'origine de l'écoulement diphasique pour les applications visées, nous étendons dans ce mémoire le modèle Interfaces and Subgrid-Scales (ISS, Toutant et al., 2009a) aux interfaces avec changement de phase, pour lesquelles l'hypothèse de continuité de la vitesse à l'interface n'est plus valable. Le suivi explicite des interfaces permet d'évaluer précisément les transferts comme le taux de transfert de masse. Dans un premier temps, nous établissons une description mésoscopique du problème où l'interface est diffuse en filtrant les équations locales instantanées et en modélisant les transferts sous-filtres aux interfaces. Les principales difficultés de modélisations proviennent (i) de la détermination de la vitesse de l'interface, (ii) de l'effet de la discontinuité des vitesses sur les modèles sous-maille, (iii) de la discontinuité du flux et (iv) de la condition de saturation de l'interface. Les modèles proposés sont qualifiés a priori en observant leur prédiction par filtrage explicite de solutions de SND. Dans un deuxième temps, nous établissons un système macroscopique discontinu équivalent au problème diffus pour bénéficier de l'expertise acquise pour les méthodes numériques de SND. Aux interfaces, les modèles sous-maille sont concentrés pour modifier les conditions de raccord entre les phases. Les conditions de saut ainsi déterminées montrent que la vitesse de l'interface est affectée par la courbure et par le saut de vitesse. Un saut de vitesse tangentielle est introduit pour modéliser la couche limite dynamique. Sur le plan thermique, nous retrouvons la condition de saturation caractéristique du changement de phase ; le taux de changement de phase ne dépend plus uniquement du saut de flux conductif mais, pour pallier la sous-résolution de la couche limite thermique au voisinage de l'interface, nous proposons de lui ajouter la contribution sous-maille des corrélations vitesse/température. Comme en SGE monophasique, le gain apporté par la modélisation ISS permet d'envisager l'utilisation de simulations fines pour des problèmes appliqués. C'est la première étape d'une démarche multi-échelle pour fournir des fermetures aux modèles moyennés à deux fluides. Nous illustrons son potentiel sur une SND multi-bulles complexe.

OBJECTIVE: The aim of this study was to analyse how people who return to the labour market after long-term sickness absenteeism and subsequent job loss differ in employability, work ability, health, educational level, age, and gender, compared to those who do not. PARTICIPANTS: The cohort consisted of 191 individuals, 20 men and 171 women, whose employment was terminated because they had not been able to return to their regular work after taking a long-term sick leave and rehabilitation measures. METHODS: This study is based on a postal questionnaire sent out to a cohort of previous employees in a Swedish municipality in 2008. RESULTS: At the time of the survey, 39% of the respondents had returned to the labour market and the remaining 61% had not. Return to the labour market after a long-term sick leave was positively associated with male gender, young age, and work ability, i.e. the ability to work with respect to health and work-related demands. Employability, educational level, and health were not significantly associated with a return to the labour market. CONCLUSIONS: In the discourse on employability, work ability is often neglected even though it is a central aspect of an individual's ability to obtain new employment.

<p>The background to the thesis is the high rate for sickness absence in Sweden since the end of the 1990s. In an international perspective, the Swedish sickness absence appears exceptionally high. This can appear paradoxical bearing in mind the high standard of living and the high average length of life in Sweden, and there is much to indicate that complex causal correlations are involved.</p><p>The overall aim of the thesis is to study and analyse the return to work or transition to disability pension, for persons on long-term sick leave from their own perspective. The focus of the thesis is the individual in a social context.</p><p>The theoretical frame of reference is within medical sociology and is about sickness concepts and models and on medicalisation. The concept of work capacity is also taken up based on the concepts of disability and impairment.</p><p>The empirical material consists of four studies. Two of these are qualitative interview studies with women. One of them (I) is about Greek women who have been granted Swedish disability pension. The aim of this study is to find explanations why such a large number of Greek women have become disability pensioners in Sweden. The analysis indicated some important factors: the doctors, the family and the social insurance system. The women had unclear psychosomatic complaints, which had been medicalised. The other qualitative study (IV) concerned women who after sick leave and rehabilitation succeeded in returning to work. It was seen to be strong and stubborn women who had to struggle to get back to working life. They had also been well taken care of in rehabilitation.</p><p>The other two studies (II and III) are quantitative, prospective cohort studies with persons on sick leave with unspecified back and neck complaints. One main aim of one study (III) was to investigate the importance of motivation for rehabilitation and return to work. Two specially designed forms were used. It was seen, among other things that the forecasts of the person on sick leave on return to work coincided quite well with a follow-up two years later. One important result was that those who had undergone rehabilitation measures had returned to work to a much lesser extent than those who had not.</p><p>Overall, the results showed the importance of listening to the individual and taking their own assessments of obstacles and possibilities in the rehabilitation process into consideration. The results in study III indicated that rehabilitation had not been sufficiently effective and in many cases did not lead to a return to work.</p>

The overall aim of this thesis was to gain new knowledge of factors and interventions that improve work ability and return to work (RTW) among women on long-term sick leave from human service organizations (HSOs). The specific aims of the studies were: to evaluate the associations between the self-rated Work Ability Index (WAI) and Work Ability Score (WAS), and the relationship with prospective sick leave, symptoms, and health (Paper I); to investigate whether intervention with myofeedback training or intensive muscular strength training could decrease pain and increase work ability among women with neck pain (Paper II); to examine the associations between workplace rehabilitation and the combination of supportive conditions at work with work ability and RTW over time (Paper III); and to explore experiences, views, and strategies in the rehabilitation process for RTW (Paper IV). This thesis is based on a prospective cohort study (n=324) and a randomized controlled study (RCT) (n=60, participants with neck pain). Both quantitative and qualitative methods were used. The data collection consisted of questionnaires, laboratory-observed data, register-based data, and interviews. The results showed a very strong association between WAI and WAS, and results predicted future sick leave degree, health-related quality of life, vitality, neck pain, self-rated general health, self-rated mental health, behavioral stress, and current stress (Paper I). In the RCT (Paper II), individuals in the myofeedback intervention group increased their vitality and work ability over time and individuals in the intensive musculoskeletal strength training group increased their WAI, WAS, and mental health over time. WAI, WAS, and RTW increased over time among individuals provided with workplace rehabilitation and supportive conditions at work (Paper III) such as a sense of feeling welcome back at work, influence at work, possibilities for development, degree of freedom at work, meaning of work, quality of leadership, social support, sense of community, and work satisfaction. Women described (Paper IV) how they were striving to work and how they had different views, strategies, and approaches in the rehabilitation process for RTW. They expressed a desire to work, their goals for work, and their wishes for work. In the rehabilitation process for RTW they described their interaction with stakeholders as either controlling the interaction or struggling in the interaction. They described strategies to cope with RTW in terms of yo-yo (fluctuating) working: yo-yo working as a strategy or yo-yo working as a consequence. This thesis identifies factors of importance in improving work ability and RTW among women on long-term sick leave from HSOs. For women with neck pain, the intervention study showed feasibility of the intervention and demonstrated improved work ability and decreased pain (Paper II). The intensive muscular strength training program, which is easy for the individual to learn and perform at home, was associated with increased work ability. The results regarding rehabilitation highlight the importance of integrating workplace rehabilitation with supportive conditions at work to increase work ability and improve RTW (Paper III). Women expressed that they were striving to work and that they wanted to work (Paper IV). These women were “going in and out” of work participation (yo-yo working) as a way to handle the rehabilitation process. For assessing the status and progress of work ability among women on long-term sick leave, the single-question WAS may be used as a compliment to the full WAI as a simple indicator (Paper I).<br><p>Akademisk avhandling som för avläggande av medicine doktorsexamen vid Sahlgrenska akademin, Göteborgs universitet, kommer att offentligen försvaras i hörsal Hamberger, Medicinaregatan 16 A, Göteborg, måndagen den 6 oktober 2014, klockan 09.00</p>