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  • 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.
21

Marking tags within the construction industry : A qualitative case study of the Swedish construction industry regarding implementing technical standardizations to promote circularity

Eriksson, Markus, Norberg, Casper January 2023 (has links)
The construction industry is vital in meeting humanity's infrastructure and essential building needs. However, its current practices contribute significantly to environmental challenges such as global warming, deforestation, and biodiversity loss. The current study points out the need for a more sustainable approach in the construction sector. The reason this study focuses on RFID-tags is both because of the academic gap regarding implementation of new standardizations and the project Lumi that this study has as its case study of the thesis.    The goal of this thesis is to analyze the Swedish construction industry’s attitude toward the implementation of RFID-tags as a standardization and fill the academic gap that has been identified in the literature review. The goal is to determine the attitude of each stakeholder type within the industry through the lens of socio-technical transition theory, to determine specific barriers and drivers for the concept. Furthermore, the aim is to determine if RFID-tags can be implemented to promote circularity and enhance sustainable development.   The research methods incorporate a literature review and a case study with semi-structured interviews conducted with eight participants. The sample consisted of actors within the construction industry, such as customers, distribution companies, entrepreneurs, manufacturers, service companies, and workers.  The thesis identified the conservative nature of the industry as an obstacle, along with the fear of failure within the construction industry. The attitude towards the standardization of RFID-tags is positive, where beneficial factors were identified, such as saving time, reducing environmental impact, and improving the structure for recycling.
22

Framgångsfaktorer för hållbar innovation : En fallstudie av Stockholms biokolsprojekt / Success factors for sustainable innovation : A case study of the Stockholm biochar project

Gustafsson, Ulrika January 2018 (has links)
Innovation is often assigned an important role in mitigating climate impact and achieving sustainable development. Stockholm city has ambitious sustainability goals and aims to be carbon neutral by 2040. This will require an increased capacity when it comes to promoting and implementing innovative sustainability solutions. Climate friendly innovations need to move from environmental profile projects to the new “business as usual”.  The aim of this study is to contribute with knowledge about innovation processes within sustainable development and how they can be promoted.   Strategic Niche Management (SNM) is a model which was developed to support a transition to sustainable development by promoting sustainability innovations. SNM suggests a number of hypotheses regarding important features of successful innovation niches, factors that will increase the potential of innovations to be developed, implemented and spread. Stockholm Biochar project is an innovative project which has received attention for its success and potential to contribute to sustainable development by reducing the city’s net carbon emissions. A case study of the Stockholm Biochar project has been conducted to identify how the project emerged and the main success factors for its development. The case study was complemented with an interview study with personnel from Vinnova, the Swedish innovation agency, focusing on their experience of success factors for innovation processes. SNM:s hypotheses has then been used to analyze the result of the case study, which was also compared to the result of the Vinnova-study. The analysis to a large extent confirms SNM:s hypotheses, regarding what factors contribute to a successful innovation niche, but also provide some specifications and elaborations on what these hypotheses mean in this specific case. This result is used to suggest possible complements to the SNM hypotheses that can be useful in contexts similar to the one studied. The result also points out important success factors that are not covered by the hypotheses suggested in SNM. Particularly the case study shows the important role of passionate enthusiasts as driving forces for innovation processes which is not pointed out in SNM hypotheses. The identified success factors, in combination with the complemented hypotheses, are used to formulate recommendations for how an organization can promote innovation processes within sustainable development. In short, the study shows that successful innovation processes require assigned resources, commitment and strategic work, e.g. visions with clearly stated sustainability goals, continuous evaluations on how innovations are contributing to these goals, active measures for gaining support for the innovation on multiple levels in society, and financial space for the development of innovations. The study also confirms the function of protected innovation niches and suggests that passionate enthusiasts have a significant role in innovations processes. / Innovation och ny teknik tillskrivs ofta en betydelsefull roll för att minska klimatpåverkan och bidra till hållbar utveckling. Stockholms stad har ambitiösa hållbarhetsmål och staden ska bland annat vara koldioxidneutral år 2040. För att uppnå detta har staden identifierat ett behov av ökad förmåga att främja, tillvarata och sprida innovationer som bidrar till hållbar utveckling. Klimatsmarta innovationer behöver gå från spjutspetsprojekt till att bli det nya ”business as usual”.  Syftet med dennastudie är att bidra med kunskap om hur innovationsprocesser inom hållbar stadsutveckling fungerar och hur dessa kan främjas.   Strategic Niche Mangament (SNM) är en modell som har utvecklats för att stödja en omställning till hållbar utveckling genom att just främja innovationsprocesser. SNM presenterar ett antal hypoteser angående vad som bidrar till framgångsrika innovationsnischer, faktorer som skapar gynnsamma förutsättningar för innovationer att utvecklas, implementeras och spridas. Ett innovationsprojekt som fått stor uppmärksamhet för dess framgång och potential att bidra till hållbar utveckling är Stockholms biokolsprojekt. En fallstudie av Biokolsprojektet har därför genomförts för att identifiera hur projektet uppstod och vad som hittills utgjort viktiga framgångsfaktorer. Detta har kompletterats med en intervjustudie med personal från Vinnova med fokus på deras erfarenhet av framgångsfaktorer för innovationsprocesser. SNM:s hypoteser har sedan använts för att analysera resultatet av fallstudien, som även jämförs med resultatet från Vinnovastudien. Resultatet bekräftar i stor utsträckning SNM:s hypoteser men visar också mer konkret vad hypoteserna inneburit i det specifika fallet. Utifrån detta föreslås en möjlig utveckling av hypoteserna som kan vara användbar i sammanhang som liknar det som studerats. Resultatet pekar också på viktiga framgångsfaktorer som inte omfattas av de hypoteser som föreslås i SNM. Framträdande bland dessa framgångsfaktorer är eldsjälars betydelse för innovationsprocesser vilket inte tas upp i SNM:s hypoteser. De identifierade framgångsfaktorerna och utvecklingen av SNM:s hypoteserhar använts för att formulera rekommendationer för hur en organisation kan främja innovationsprocesser inom hållbar utveckling.   Kortfattat visar studien att innovationsprocesser inom hållbar utveckling behöver avsatta resurser, engagemang och strategiskt arbete, t.ex. i form av visioner med tydliga hållbarhetsmål, uppföljning av hur innovationen bidrar till de målen, aktivt arbete för att skapa förankring för innovationen på olika nivåer i samhället, samt ekonomiskt utrymme för innovationer att utvecklas. Studien bekräftar också funktionen av skyddande innovationsnischer och visar på att eldsjälar har en viktig roll i innovationsprocesser.
23

The molecular structure of selected South African coal-chars to elucidate fundamental principles of coal gasification / Mokone Joseph Roberts

Roberts, Mokone Joseph January 2015 (has links)
Advances in the knowledge of chemical structure of coal and development of high performance computational techniques led to more than hundred and thirty four proposed molecular level representations (models) of coal between 1942 and 2010. These models were virtually on the carboniferous coals from the northern hemisphere. There are only two molecular models based on the inertinite- and vitrinite-rich coals from the southern hemisphere. The current investigation is based on the chars derived from the Permian-aged coals in two major South African coalfields, Witbank #4 seam and Waterberg Upper Ecca. The two coals were upgraded to 85 and 93% inertinite- and vitrinite-rich concentrates, on visible mineral matter free basis. The coals were slow heated in inert atmosphere at 20 ℃ min-1 to 450, 700 and 1000 ℃ and held at that temperature for an hour. After the HCl-HF treatment technique at ambient temperatures, the characteristics of the coals and chars were examined with proximate, ultimate, helium density, porosity, surface area, petrographic, solid-state 13C NMR, XRD and HRTEM analytical techniques. The results largely showed that substantial transitions occurred at 700-1000 ℃, where the chars became physically different but chemically similar. Consequently, the chars at the highest temperature (1000 ℃) drew attention to the detailed study of the atomistic properties that may give rise to different reactivity behaviours with CO2 gas. The H/C atomic ratios for the inertinite- and vitrinite-rich chars were respectively 0.31 and 0.49 at 450 ℃ and 0.10 and 0.12 at 1000 ℃. The true density was respectively 1.48 and 1.38 g.cm-3 at 450 ℃ and 1.87 and 1.81 g.cm-3 at 1000 ℃. The char form results from the petrographic analysis technique indicated that the 700-1000 ℃ inertinite-rich chars have lower proportions of thick-walled isotropic coke derived from pure vitrinites (5-8%) compared with the vitrinite-rich chars (91-95%). This property leads to the creation of pores and increases of volume and surface area as the softening walls expand. It was found that the average crystallite diameter, La, and the mean length of the aromatic carbon fringes from the XRD and HRTEM techniques, respectively, were in good agreement and made a definite distinction between the 1000 ℃ inertinite- and vitrinite-rich chars. The crystallite diameter on peak (10) approximations, La(10), of 37.6Å for the 1000 ℃ inertinite-rich chars fell within the HRTEM’s range of minimummaximum length boundary of 11x11 aromatic fringes (27-45Å). The La (10) of 30.7Å for the vitrinite-rich chars fell nearly on the minimum-maximum length range of 7x7 aromatic fringes (17-28Å.) The HRTEM results showed that the 1000 ℃ inertinite-rich chars comprised a higher distribution of larger aromatic fringes (11x11 parallelogram catenations) compared with a higher distribution of smaller aromatic fringes (7x7 parallelogram catenations). The mechanism for the similarity between the 700-1000 ℃ inertinite- and vitrinite-rich chars was the greater transition occurring in the vitrinite-rich coal to match the more resistant inertinite-rich coal. This emphasised that the transitions in the properties of vitrinite-rich coals were more thermally accelerated than those of the inertinite-rich coals. The similarity between the inertinite- and vitrinite-rich chars was shown by the total maceral reflectance, proximate, ultimate, skeletal density and aromaticity results. Evidence for this was the carbon content by mass for the inertinite- and vitrinite-rich chars of respectively 90.5 and 85.3% at 450 ℃ and 95.9 and 94.1% at 1000 ℃. The aromaticity from the XRD technique was respectively 87 and 77% at 450 ℃ and 98 and 96% at 1000 ℃. A similar pattern was found in the hydrogen and oxygen contents, the atomic O/C ratios and the aromaticity from the NMR technique. The subsequent construction of large-scale molecular structures for the 1000 ℃ inertinite-rich chars comprised 106 molecules constructed from a total of 42929 atoms, while the vitrinite-rich char model was made up of 185 molecules consisting of a total of 44315 atoms. The difference between the number of molecules was due to the inertinite-rich char model comprising a higher distribution of larger molecules compared with the vitrinite-rich char model, in agreement with the XRD and HRTEM results. These char structures were used to examine the behaviour on the basis of gasification reactivity with CO2. The density functional theory (DFT) was used to evaluate the interactions between CO2 and the atomistic representations of coal char derived from the inertinite- and vitrinite rich South African coals. The construction of char models used the modal aromatic fringes (fringes of highest frequencies in size distributions) from the HRTEM, for the inertinite- and vitrinite-rich chars, respectively (11x11 and 7x7 parallelogram-shaped aromatic carbon rings). The structures were DFT geometrically optimized and used to measure reactivity with the Fukui function, f+(r) and to depict a representative reactive carbon edge for the simulations of coal gasification reaction mechanism with CO2 gas. The f+(r) reactivity indices of the reactive edge follows the sequence: zigzag C remote from the tip C (Czi = 0.266) > first armchair C (Cr1 = 0.087) > tip C (Ct = 0.075) > second armchair C (Cr2 = 0.029) > zigzag C proximate to the tip C (Cz = 0.027). The DFT simulated mean activation energy, ΔEb, for the gasification reaction mechanism (formation of second CO gas molecule) was 233 kJ mol-1. The reaction for the formation of second CO molecule is defines gasification in essence. The experimental activation energy determined with the TGA and random pore model to account essentially for the pore variation in addition to the gasification chemical reaction were found to be very similar: 191 ± 25 kJ mol-1 and 210 ± 8 kJ mol-1; and in good agreement with the atomistic results. The investigation gave promise towards the utility of molecular representations of coal char within the context of fundamental coal gasification reaction mechanism with CO2. / PhD (Chemical Engineering), North-West University, Potchefstroom Campus, 2015
24

The molecular structure of selected South African coal-chars to elucidate fundamental principles of coal gasification / Mokone Joseph Roberts

Roberts, Mokone Joseph January 2015 (has links)
Advances in the knowledge of chemical structure of coal and development of high performance computational techniques led to more than hundred and thirty four proposed molecular level representations (models) of coal between 1942 and 2010. These models were virtually on the carboniferous coals from the northern hemisphere. There are only two molecular models based on the inertinite- and vitrinite-rich coals from the southern hemisphere. The current investigation is based on the chars derived from the Permian-aged coals in two major South African coalfields, Witbank #4 seam and Waterberg Upper Ecca. The two coals were upgraded to 85 and 93% inertinite- and vitrinite-rich concentrates, on visible mineral matter free basis. The coals were slow heated in inert atmosphere at 20 ℃ min-1 to 450, 700 and 1000 ℃ and held at that temperature for an hour. After the HCl-HF treatment technique at ambient temperatures, the characteristics of the coals and chars were examined with proximate, ultimate, helium density, porosity, surface area, petrographic, solid-state 13C NMR, XRD and HRTEM analytical techniques. The results largely showed that substantial transitions occurred at 700-1000 ℃, where the chars became physically different but chemically similar. Consequently, the chars at the highest temperature (1000 ℃) drew attention to the detailed study of the atomistic properties that may give rise to different reactivity behaviours with CO2 gas. The H/C atomic ratios for the inertinite- and vitrinite-rich chars were respectively 0.31 and 0.49 at 450 ℃ and 0.10 and 0.12 at 1000 ℃. The true density was respectively 1.48 and 1.38 g.cm-3 at 450 ℃ and 1.87 and 1.81 g.cm-3 at 1000 ℃. The char form results from the petrographic analysis technique indicated that the 700-1000 ℃ inertinite-rich chars have lower proportions of thick-walled isotropic coke derived from pure vitrinites (5-8%) compared with the vitrinite-rich chars (91-95%). This property leads to the creation of pores and increases of volume and surface area as the softening walls expand. It was found that the average crystallite diameter, La, and the mean length of the aromatic carbon fringes from the XRD and HRTEM techniques, respectively, were in good agreement and made a definite distinction between the 1000 ℃ inertinite- and vitrinite-rich chars. The crystallite diameter on peak (10) approximations, La(10), of 37.6Å for the 1000 ℃ inertinite-rich chars fell within the HRTEM’s range of minimummaximum length boundary of 11x11 aromatic fringes (27-45Å). The La (10) of 30.7Å for the vitrinite-rich chars fell nearly on the minimum-maximum length range of 7x7 aromatic fringes (17-28Å.) The HRTEM results showed that the 1000 ℃ inertinite-rich chars comprised a higher distribution of larger aromatic fringes (11x11 parallelogram catenations) compared with a higher distribution of smaller aromatic fringes (7x7 parallelogram catenations). The mechanism for the similarity between the 700-1000 ℃ inertinite- and vitrinite-rich chars was the greater transition occurring in the vitrinite-rich coal to match the more resistant inertinite-rich coal. This emphasised that the transitions in the properties of vitrinite-rich coals were more thermally accelerated than those of the inertinite-rich coals. The similarity between the inertinite- and vitrinite-rich chars was shown by the total maceral reflectance, proximate, ultimate, skeletal density and aromaticity results. Evidence for this was the carbon content by mass for the inertinite- and vitrinite-rich chars of respectively 90.5 and 85.3% at 450 ℃ and 95.9 and 94.1% at 1000 ℃. The aromaticity from the XRD technique was respectively 87 and 77% at 450 ℃ and 98 and 96% at 1000 ℃. A similar pattern was found in the hydrogen and oxygen contents, the atomic O/C ratios and the aromaticity from the NMR technique. The subsequent construction of large-scale molecular structures for the 1000 ℃ inertinite-rich chars comprised 106 molecules constructed from a total of 42929 atoms, while the vitrinite-rich char model was made up of 185 molecules consisting of a total of 44315 atoms. The difference between the number of molecules was due to the inertinite-rich char model comprising a higher distribution of larger molecules compared with the vitrinite-rich char model, in agreement with the XRD and HRTEM results. These char structures were used to examine the behaviour on the basis of gasification reactivity with CO2. The density functional theory (DFT) was used to evaluate the interactions between CO2 and the atomistic representations of coal char derived from the inertinite- and vitrinite rich South African coals. The construction of char models used the modal aromatic fringes (fringes of highest frequencies in size distributions) from the HRTEM, for the inertinite- and vitrinite-rich chars, respectively (11x11 and 7x7 parallelogram-shaped aromatic carbon rings). The structures were DFT geometrically optimized and used to measure reactivity with the Fukui function, f+(r) and to depict a representative reactive carbon edge for the simulations of coal gasification reaction mechanism with CO2 gas. The f+(r) reactivity indices of the reactive edge follows the sequence: zigzag C remote from the tip C (Czi = 0.266) > first armchair C (Cr1 = 0.087) > tip C (Ct = 0.075) > second armchair C (Cr2 = 0.029) > zigzag C proximate to the tip C (Cz = 0.027). The DFT simulated mean activation energy, ΔEb, for the gasification reaction mechanism (formation of second CO gas molecule) was 233 kJ mol-1. The reaction for the formation of second CO molecule is defines gasification in essence. The experimental activation energy determined with the TGA and random pore model to account essentially for the pore variation in addition to the gasification chemical reaction were found to be very similar: 191 ± 25 kJ mol-1 and 210 ± 8 kJ mol-1; and in good agreement with the atomistic results. The investigation gave promise towards the utility of molecular representations of coal char within the context of fundamental coal gasification reaction mechanism with CO2. / PhD (Chemical Engineering), North-West University, Potchefstroom Campus, 2015
25

L’exploration des incitatifs et des obstacles à entreprendre des études universitaires dans le cadre d’un cursus intégré DEC-BAC en sciences infirmières

Gauthier, Justine 06 1900 (has links)
Au Québec, les infirmières n’ont pas l’obligation de détenir un diplôme universitaire pour exercer leur profession. Celles qui choisissent le DEC en soins infirmiers peuvent obtenir le diplôme de baccalauréat en deux ans au lieu de trois en empruntant le cursus DEC-BAC en sciences infirmières. Or, ce n’est pas la majorité d’entre elles qui se prévalent de cette possibilité, alors que des études ont démontré les avantages d’avoir un plus grand nombre d’infirmières détenant un baccalauréat dans les milieux de soins (Aiken, Clarke, Cheung, Sloane & Silber, 2003; Kane, Shamliyan, Mueller, Duval & Wilt, 2007; Tourangeau, Cranley & Jeffs, 2006 ; Aiken et al., 2014). Le but de la présente étude était d’explorer les incitatifs et les obstacles à entreprendre des études universitaires dans le cadre du cursus intégré DEC-BAC en sciences infirmières. Cinquante-six nouvelles diplômées ayant complété un DEC en soins infirmiers au Québec ont répondu au questionnaire auto-administré électronique à questions ouvertes. Le cadre de référence guidant la recherche exploratoire était la théorie intermédiaire de la transition de Meleis, Sawyer, Im, Hilfinger Messias et Schumacher (2010). Suivant cette théorie, les données ont d’abord été regroupées par thèmes, soit « incitatifs » et « obstacles » puis par dimensions, à savoir si les thèmes relèvent de conditions au plan personnel, communautaire ou sociétal pour entreprendre des études universitaires. Il ressort de l’étude que les incitatifs majeurs à entreprendre des études universitaires se situent au plan communautaire : meilleures conditions de travail anticipées et développement professionnel. Les obstacles majeurs à entreprendre des études universitaires se situent au plan personnel, en particulier en lien avec une situation financière ou familiale défavorable. Nous avons aussi trouvé que le contexte québécois exerce une influence sur la décision d’entreprendre des études universitaires. Des recommandations ont été formulées pour les milieux de pratique et de formation, ainsi que pour la recherche. / Quebec nurses do not require a bachelor’s degree in order to obtain their license to practice. Choosing the college diploma entitles nurses to obtain a bachelor’s degree in two years instead of three by doing a DEC-BAC in nursing. Although many studies have shown the positive impact of having a greater number of baccalaureate-level nurses in the health care system, (Aiken, Clarke, Cheung, Sloane & Silber, 2003 ; Kane, Shamliyan, Mueller, Duval & Wilt, 2007 ; Tourangeau, Cranley & Jeffs, 2006 ; Aiken et al., 2014) the majority of nursing students choose not to enroll in university studies. The goal of the present study was to explore the incentives and obstacles to engage in university studies in the context of an integrated DEC-BAC curriculum. Fifty-six new CEGEP graduates completed a self-administered open-ended questions survey on the Internet. The theoretical framework used to guide this exploratory study was the transition middle-range theory of Meleis, Sawyer, Im, Hilfinger Messias and Schumacher (2010). Following this theory, data was collected and grouped into two themes, « incentives » and « obstacles », which were then analysed in order to see if they were determined by personal, community or societal conditions. The major incentives to engaging in university studies in the context of a DEC-BAC curriculum were related to the community conditions and were found to be better anticipated working conditions and the possibility of professional development. The major obstacles found were related to personal conditions and, particularly, to an unfavorable financial or family situation. We also found that Quebec’s context influences the decision to engage in university studies. Recommendations were provided for nursing practice and education, as well as for research.
26

中國中東介入政策的評估:權力轉移現象的浮現? / Assessing China's Engagement in the Middle East: Emerging Power Transition?

松柔霓, Oren, Roni Unknown Date (has links)
本研究主要探討中國如何介入中東地區,並且檢視其多重戰略操作現況,其中包括了安全議題、能源議題、以及經貿議題。透過中國藉由上述議題介入中東事務的發展,本研究期望能呈現中國的中東外交政策及其未來發展趨勢。本研究以中國與美國兩強是否會在中東地區發生權力轉移的可能作為研究問題,有鑑於此,本研究以AFK Organski的權力轉移理論作為全文的概念化基礎,並且重新檢視權力轉移理論在近年來的發展與實踐。就此,本研究將回應下列幾個問題:中國的中東外交政策之主要戰略目的為何?此一政策在中國全方位外交政策中的權重與定位為何?中國與中東國家的交往及雙邊關係中,所具備的優勢與劣勢為何?從結構層次來說,中國與美國在中東是否將達到權力平衡的局面?最後,中國是否滿意現階段自身在中東的地位以及中東地緣政治本身的現況?又或者中國傾向改變中東現狀,並且有意取代美國。本研究透過對上述問題的重新檢視,發現如果中國在中東所介入的勢力與議題越廣泛,並且以挑戰美國霸權為前提全力推進中國的中東介入政策,這意味著中東的現狀與規則將會被調整與改變,進而產生權力轉移的情況。不過,中國現階段並未有意、有能力挑戰美國在中東的戰略地位,因為這將使得中國與美國的結構性矛盾導向衝突。 / This study aims at examining the different aspects of China’s involvement in the Middle East: security, energy and economy, in the context of its evolving foreign policy and changing international status. The main question of the research is whether a power transition between the US and China is possible in the region of the Middle East. Hence. The power transition theory developed by AFK Organski in the 1950s is the basis of this research. The main question is answered by several secondary questions: What is China's foreign policy in the Middle East, and how does it combine into its overall foreign policy; What are the strong points as opposed to the weak points of China's relations with Middle Eastern countries; Is China on the course of achieving parity with the US in the region of Middle East? And the last one, is China satisfied with its current role in the Middle East and the regional existing order, or it would like to alter it in order for it to be able to replace the US as the hegemonic power in the area. If China is indeed becoming more powerful in the area and is challenging the American hegemony, the transformation of the current order and accepted rules of the games in the region could be changed to accommodate China’s needs, and this might lead to tension between China and the US or even conflicts.
27

Strategy for transition of adolescents with intellectual disablities into adulthood

Malapela, Rakgadi Grace 01 1900 (has links)
Transition into adulthood has been regarded as a priority in health. However, there is scarcity of literature on the transition of adolescents with intellectual disability. The purpose of this study was to develop a strategy for transition of adolescents with intellectual disabilities into adulthood based on the Transition Theory proposed by Meleis, Sawyer, Im, Hilfinger and Schumacher (2000). The research objectives of this study were in three phases: Phase I: Desk review  To explore the known factors about the transition process of adolescents with IDs into adulthood.  To identify gaps in literature on the transition of adolescents with intellectual disabilities’ transition into adulthood. Phase II: Mixed method  To explore and describe the experiences of caregivers and health care professionals on the transition of adolescents with IDs into adulthood.  To investigate challenges that hamper the transition process of adolescents with IDs into adulthood. Phase III: Development of strategy  To develop a strategy for transition of adolescents with IDs into adulthood informed by findings from phases I and II. A sequential exploratory mixed method approach was used. A purposive, snowballing and simple random sampling were used to select participants for this study. The study was conducted in Special schools, Non-Governmental Organisations and Care and Rehabilitation Centres based in Gauteng province of South Africa. Triangulation of data sources and data collection methods was used to sample one hundred and forty nine (149) participants aged 21-60+ years who experienced caring for individuals with intellectual disabilities. Interpretative analysis proposed by Terrablanche. Durrheim and Kelly (2006) was used for qualitative data limited to a sample of n=29 participants. Quantitative data was analysed by use of IBM Statistical Package of Social Sciences (SPSS: 24) with a blend of descriptive and inferential statistics limited to a sample of n=120. Five themes from both qualitative and quantitative results emerged that is, transition possibility; the role of different stakeholders; the provision and development of working skills; caregivers’ knowledge and understanding of guidelines and alterations to adapt to change. The development of the transition strategy bridged a significant gap that informs nurses, teachers, parents, policy-makers and other stakeholders in supporting transition of adolescents with intellectual disabilities into adulthood. / Health Studies / D. Litt. et Phil. (Health Studies)
28

High Achieving Black Students’ Mathematics Identities in the High School to CollegeTransition in STEM

Ayisi, Elizabeth O. 23 May 2022 (has links)
No description available.
29

Examining the College Experiences and Coping Mechanisms of Post 9/11 Student Veterans

Fegley, Mark A. 19 May 2022 (has links)
No description available.
30

Battery supported charging infrastructure for electric vehicles : And its impact on the overall electricity infrastructure / Laddinfrastruktur för elbilar kopplat till stationära batterilager : Och dess inverkan på elnätet

Svensson Dahlin, Marcus January 2019 (has links)
The Paris Agreement was formed in 2015 to reduce the environmental impact and limit the increase in temperature to 2°C compared to pre-industrial levels. It is believed that an electrification of the transport sector will reduce its negative environmental impact. To reach the goals set by the Paris Agreement we are in need of quick development towards an electrified fleet of vehicles. Despite this urgency electric vehicles (EVs) have failed to reach the majority of the market, instead it has stuck in the chasm between the early adopters and the early majority of the markets. This is due to three main challenges; EVs are relatively expensive compared to conventional petrol- and diesel-powered vehicles, EVs have an inadequate driving range, and the access to a functional charging infrastructure is limited. This thesis focuses on the third challenge regarding charging infrastructure. The charging infrastructure is dependent on the existing electricity distribution infrastructure, i.e. the grid. It is rather time-consuming and costly to strengthen the grid, which is deemed necessary for enabling a roll-out of a charging infrastructure that meets the needs of current and near-future EV operators. This research provides an alternative way of approaching the issues. Instead of strengthening the grid by digging up old cables it looks into the opportunities of incorporating stationary battery storages as a buffer between the EV charging stations and the grid connection point. This battery solution can reduce the power outtake and smoothen out the load from EV charging, thus limiting the impact of EV charging from a grid perspective. The research assesses what type of pathways this solution could follow to successfully drive the adoption of EVs. Furthermore, the study tries to understand how these solutions could be designed to deliver the necessary values regarding EV charging and reducing the overall power outtake from grid connection points. The thesis is carried out by analyzing collected quantitative and qualitative data through the lens of three main theories. These are transition theory, theory on eco-innovations, and theory on the diffusion of innovations. The thesis finds that the two pathways for a battery supported charging infrastructure that will be most efficient in speeding up the adoption rate of EVs is within a workplace and public charging setting in city and urban environments. For both pathways it is expected that a centralized concept, with one battery solution connected to several charging points, will be most feasible in the short-term, which is important as the need for developments are very urgent. The workplace charging will provide 3,6 kW AC-charging while the public charging provides 150 kW DC-charging. The solution is expected to be cost-efficient for specific locations, especially for public charging in city environments with strained grid infrastructures. The study provides an initial assessment for the city of Stockholm which indicates that the power outtake can be reduced by 63,5–112,2 MW in 2030. This means that the current grid infrastructure could support a larger number of EVs, thus reducing the greenhouse-gas emissions from the transport sector and bringing us closer to reaching the goals set by the Paris Agreement. / Parisavtalet utformades år 2015 för att reducera vår klimatpåverkan och begränsa temperaturökningen till 2°C jämfört med nivåerna som rådde innan den industriella revolutionen. Förhoppningen är att en elektrifiering av transportsektorn kan reducera dess negativa klimatpåverkan. För att nå målen i Parisavtalet behövs en snabb omställning mot en elektrifiering av fordonsflottan. Trots situationens brådskande karaktär har elbilar fastnat i en klyfta mellan den begränsade tidiga marknaden och den sena marknaden, vilken utgör majoriteten av kunderna. Det finns tre primära anledningar till detta; elbilar är dyra jämfört med bensin- och dieseldrivna bilar, räckvidden för elbilar är otillräcklig, och det råder begränsad tillgång till en funktionell laddinfrastruktur. Den här studien fokuserar på den tredje anledningen kring otillräcklig laddinfrastruktur. Laddinfrastrukturen är beroende av det existerande elnätet och dess distributionskapacitet. En förstärkning av elnätet är i många fall nödvändig för att möjliggöra en utrullning av en laddinfrastruktur som möter dagens och morgondagens behov. Istället för att förstärka elnätet genom att gräva ner tjockare kablar så fokuserar denna studie på en alternativ lösning kring laddinfrastruktur sammankopplat med stationära batterilager. Batterilagret agerar som en buffert mellan anslutningspunkten till elnätet och laddningspunkten för elbilar. Genom att reducera effektuttaget och jämna ut lastkurvan för elbilsladdning kan en batterilösning begränsa den negativa påverkan det förväntas ha på elnätet. Studien undersöker vilka vägar denna batterilösning kan ta för att öka antalet elbilar i fordonsflottan. Efter att ha förstått vilka dessa lösningsvägar är så analyserar studien hur dessa lösningar kan vara uppbyggda för att erbjuda de efterfrågade och nödvändiga värdena för elbilsladdning och elnätets fortsatta funktionalitet. Studien bygger på analys av kvalitativa och kvantitativa data. Analysen utförs genom att applicera koncept hämtade från teorier kring teknologiska övergångar, miljöinnovationer och spridning av innovationer. De två lösningsområden som förväntas vara mest effektiva i att driva en ökning av antalet elbilar i Sverige är arbetsplatsladdning samt offentlig laddning i stadsmiljöer. En lösning med ett centraliserat batterisystem där en batterilösning är kopplat till flera laddstationer antas vara mest genomförbar på kort sikt, vilket anses vara centralt på grund av utmaningarnas brådskande karaktär. För arbetsplatsladdning tillhandahålls 3,6 kW AC-laddning och för offentlig laddning tillhandahålls 150 kW DC-laddning. Lösningarna förväntas vara kostnadseffektiva for specifika platser och användarprofiler, speciellt för offentlig laddning i stadsområden med ansträngda elnät. En initial uppskattning visar att en laddinfrastruktur kopplat till stationära batterilager inom de två lösningsområdena kan minska Stockholms effektuttag för elbilsladdning med 63,5–112,2 MW år 2030. Detta betyder att dagens elnät kan tillgodose ett ökat antal elbilar, vilka genererar färre utsläpp av växthusgaser och ger oss en bättre chans att nå Parisavtalets mål.

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