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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.
411

Green Co-Housing

Lindfors, Martin January 2021 (has links)
Mitt projekt undersöker fenomenet Co-Housing. Jag har jämfört några internationella exempel på detta tema för att lära mig mer. Jag föreslår en Co-Housing-enhet bestående av ett mindre antal lägenheter och stora delade utrymmen. Andra än de som bor i enheten kan hyra ett utrymme under dagtid och arbeta där på sina olika projekt, eller göra något kreativt arbete som att måla i de trevliga delade utrymmena. Odling kan utövas i en växthusdel och måltiderna tillagas och intas i en stor matsal med kök med utsikt mot väster. Mitt projekt ligger i en brant terräng och har utsikt över Stockholm på de två översta två planen. Tallar dominerar platsen. Jag föreslår en uppdaterad version av Co-Housing i ett svenskt sammanhang med delning och samarbete som vägledande nyckelvärden. / My project examines the phenomenom Co-Housing. I have compared a few international examples on this theme, in order to learn more. I propose a Co-Housing unit comprising of a smaller number of living units and large shared spaces. Others than people living in the unit can rent a space during day-time and work there on their lap-tops, or do some creative work like painting in the nice shared spaces. Urban farming can be practiced in a green-house section and meals are prepared and cooked in a big kitchen/dining space with a view facing west. My project is set in a steep terrain and overlooks Stockholm at the top levels. Pine trees dominate the site. I have aimed to propose an updated version of Co-Housing in the swedish context with sharing and co-operation as guiding key values.
412

Selective CO Adsorption Separation from CO2 via Cu-modified Adsorbents

Abbassi, Maria 18 May 2021 (has links)
CO2 capture and conversion appears to be a prominent solution to mitigate greenhouse gas emissions (GHG) and global warming issue. Among different CO2 conversion approaches, CO2 hydrogenation via reverse water gas shift (RWGS) reaction is one of the most promising technology to convert CO2 to CO. Subsequently, CO is transformed to value added chemicals or liquid fuels. To improve the overall CO2 conversion for RWGS reaction, product separation and recycling is being proposed. In this research, adsorption separation technology has been explored to selectively separate CO from CO2 in RWGS using pressure swing adsorption (PSA) process. To investigate the adsorption capacity and selectivity of CO, different porous materials have been identified for CO separation. In this research, activated carbons, ordered mesoporous silica, and metal organic framework materials were studied. Equilibrium isotherms of CO and CO2 were measured in a gravimetric system at a temperature of 25 °C for pressures up to 20 bar. Preliminary adsorption isotherm results had shown an insufficient CO uptake and low selectivity level compared to CO2, thus not justifying their application for CO separation. Herein, to improve the CO adsorption capacity and selectivity, Cu-based adsorbents were developed using copper (II) chloride (CuCl2) as a precursor to synthesize six different adsorbents. The adsorbents were prepared using two different synthesis methods; the modified polyol method for reduction and nanoparticle deposition of Cu (I) ions, and thermal monolayer auto-dispersion method. Furthermore, different copper (II) loadings were investigated to determine the monolayer dispersion capacity of CuCl2 on the support. The modified adsorbents by copper salt exhibited significantly high CO uptake with large CO/CO2 selectivity, reversing the results obtained before adsorbent modification. Thus, Cubased adsorbents are promising materials for CO separation and recovery from a gaseous mixture containing CO2.
413

Mental Health and Incarcerated Youth. I: Prevalence and Nature of Psychopathology

Atkins, D. Lanette, Pumariega, Andres J., Rogers, Kenneth, Montgomery, Larry, Nybro, Cheryl, Jeffers, Gary, Sease, Franklin 01 January 1999 (has links)
The incarceration of mentally ill youth is a serious problem not receiving the same attention as in adults. In this study, we examine the prevalence of psychopathology and level of behavioral symptomatology in incarcerated youth versus youth receiving community mental health services or hospitalization. We randomly recruited youth from middle South Carolina served by a local CMHC (n = 60), youth served by the state adolescent inpatient program (n = 50), and youth in the S.C. Dept. of Juvenile Justice facilities from the same region (n = 75). We used the DISC-PC 2.3 to evaluate DSM-III-R diagnoses and the CBCL and YSR to evaluate behavioral symptomatology. On the DISC, incarcerated youth had significantly higher mean number of diagnoses and symptoms than CMHC youth, but lower numbers than hospitalized youth. Level of "caseness" (at least one diagnosis) was 86% in hospital youth, 72% in incarcerated youth, and 60% in CMHC youth. The groups differed in CBCL mean total T, internalizing T, and externalizing T scores as well as mean YSR internalizing T scores. Our results indicate the comparability in level of psychopathology in incarcerated and community-treated populations of youth, and the need to develop diversionary programs to prevent the entry of such youth into the juvenile justice system.
414

Samverkan med underentreprenörer i tidiga skeden : En fallstudie om möjligheter och utmaningar / Early involvement of subcontractors in partnering projects : A case study of challenges and impacts

Sundqvist, Mikaela January 2020 (has links)
Samverkan har blivit ett populärt ledningssätt i samhällsbyggnadssektorn och förordas i komplexa projekt med stora osäkerheter, specialanpassningar och tidspress. Det innefattar i stora drag ett strukturerat samarbete mellan beställare, entreprenörer och konsulter med kärnfunktioner som öppen bokföring, startworkshopar och gemensamma målbilder. I samhällsbyggnadssektorn är ett av kärnproblemen att projekten är uppdelade i olika skeden och länkarna mellan olika roller och skeden blir svår att hantera vilket lätt leder till konflikter, samverkan är ett tillvägagångssätt som har lyfts för att förbättra detta. I studien används begreppet samverkansstrategi för att beskriva hur samverkan ser ut ett projekt, både till den upphandlingsstrategi som används men även kring de dimensioner Eriksson (2015) konstruerat för samverkan i sitt ramverk där bredd, intensitet, varaktighet och djup används. Effekter av en stor bredd i samverkan med fler aktörer har dock inte studerats i någon större utsträckning trots att byggprojekt ofta innehåller en stor mängd deltagare, där fler kompetenser är en förutsättning för en snabbare byggprocess. Studiens ambition är därför att studera hur en större bredd med fler entreprenörer i samverkan påverkar samverkan i projekten. Dessutom avser studien fokusera på hur en stor bredd i samverkan mer fler entreprenörer påverkar i de tidiga skedena, där kvaliteter och det ekonomiska utfallet av olika delar bestäms. Ytterligare så är cocreation (ungefär: samutveckling, samproduktion) ett begrepp som har lyfts som en metod för företag att förbättra sin produktivitet och bli mer konkurrenskraftiga. Trots att begreppet är snarlikt med samverkan så handlar co-creation mer specifikt om att aktörerna tillsammans med kunden har en aktiv dialog och problemlöser och bearbetar produkten tillsammans. Här har cocreation möjlighet att förstärka både utforskande av ny, och nyttjande av redan känd kunskap men det har mest studerats mellan beställare och entreprenör. Därför är studiens inriktning även att utforska hur samverkansstrategier med en större bredd med fler underentreprenörer påverkar co-creation. En fallstudiemetod valdes då den är lämplig för att förklara hur olika aspekter påverkar varandra, den huvudsakliga datainsamlingen i studien var en intervjustudie med totalt 15 intervjuer fördelat på tre projekt med vissa skillnader i samverkansstrategier. Intervjuer hölls med roller från underentreprenörer, huvudentreprenör och beställare och även två samverkansledare. Ett av projekten hade underentreprenörer medverkande från systemhandlingsskedet och två av projekten planerade att involvera underentreprenörer från bygghandlingsskedet. Intervjuerna kompletterades med observationer och arkivstudier varefter empirin analyserades utifrån de olika samverkansstrategierna. Resultat från studien visar att samverkan är lämpligt för projekt med tidspress och dessutom bör då mer vikt läggas vid samverkansstrategin, med en större samverkansbredd som ett alternativ. Det teoretiska bidrag studien gör är att ytterligare stärka Erikssons (2015) ramverk när det kommer till att bredd och intensitet ska beskrivas tillsammans för att förstå samverkan, likadant med bredd och varaktighet. Det här innebär att en samverkansstrategi med en större bredd kan stärka samverkan genom att lägga större vikt vid intensiteten, exempelvis genom en samverkansform med samverkansledare och startworkshop. Det innebär också att samverkan kan stärkas i en större bredd genom en längre varaktighet mellan aktörerna, till exempel med prekvalificering av underentreprenörer från tidigare samarbeten. Studien visar också att lärandeprocesserna kunskapsutbyte, anpassning och stegvis utveckling är något som kommer ur co-creation i en större bredd men att det här är starkt relaterat till vilken samverkansvaraktighet som gäller. Teorin pekar på största effekt vid involvering mellan programhandlingsskede och bygghandlingsskede och studiens bidrag är att bygghandlingsskedet anses för sent om syftet är att låta underentreprenörer bidra med alternativa lösningar. Ytterligare visar resultat från studien att underentreprenörer som involveras vill ha någonting att utgå ifrån för att komma igång, det vill säga en kravlista alternativt en handling att omarbeta. En mindre bredd kan väljas om beställaren och eventuellt huvudentreprenören vill ha mer flexibilitet i utformningen, däremot minskar totalentreprenader enligt teorin beställarens inflytande, även om det lyfts som flexibelt i kommunala samverkansprojekt där risken minskas för överklaganden. Teknisk kunskap hos aktörerna och beställarnärvaro med beslutsförmåga lyfts som viktiga faktorer när det kommer till både samverkan och co-creation.
415

Co-Branding as a Market-Driven Strategic Financial Investment Option in the Hospitality Industry

Hahm, Sung-Pil 27 April 2001 (has links)
The purpose of this study was to examine the trends in co-branding, especially when one brand is linked with another brand through a business strategy, in order to investigate the factors that lead to co-branding as a strategic investment option in the hospitality industry. Of primary interest was whether co-branding strategies are significant issues in the hospitality industry. This study also investigated the relationship between explicit and implicit requirements and timing of entry for co-branding investment. The co-branding investment model developed for this study could be a valuable asset for the hospitality industry. The results of this study indicated that there were some relationships among implicit and explicit requirements and the timing of co-branding entry, especially the finding that restaurateurs who had a strong market share emphasis and long franchising experience were more willing to invest in co-branding. Also restaurateurs who were not satisfied with prior sales performance were more likely to invest in the co-branding concept. We also discovered that investors in co-branding, no matter whether early or late movers, are usually satisfied with the performance of their co-branded stores. This study clearly showed that co-branding investment activities were widely practiced among franchisees, regardless of how many years of experience they had, or if they were large, or small local companies. / Ph. D.
416

Departmental analysis of telephone management

Unknown Date (has links)
M.S. Florida State University 1955 / Includes bibliographical references (pages 68-69)
417

100 Gbps coherent MB-OFDM for long-haul WDM optical transmission / Transmission optique longue distance avec le format MB-OFDM cohérent à 100 Gbps

Karaki, Julie 12 April 2013 (has links)
Aujourd'hui, le format « Quadrature Phase Shift Keying » avec multiplexage de polarisation (DP-QPSK) opérant à 100 Gbps est devenue un standard pour la transmission WDM longue distance. Une alternative au format DP-QPSK permettant d’atteindre des débits de 100 Gbps et plus (400 G & 1Tbps) est l’ « Orthogonal Frequency Division Multiplexing » (OFDM). Mais, des interrogations subsistent quant à sa robustesse aux effets non linéaires. Dans cette thèse nous avons étudié le potentiel de la technologie OFDM pour la transmission WDM longue distance à 100 Gbps. Le traitement du signal est détaillé ainsi que la mise en œuvre du transmetteur et récepteur OFDM cohérent. Nous présentons aussi les résultats expérimentaux de la transmission obtenus dans plusieurs configurations. Dans l’une de ces configurations, le canal modulé avec le format DP-OFDM coherent (Co-DP-OFDM) est multiplexé avec 40 canaux modulés en DP-QPSK à 100 Gbps. Les canaux ont ensuite été transmis sur 1000 km de fibre G.652 sans gestion de dispersion chromatique. Dans une autre configuration, les canaux Co-DP-OFDM et Co-DP-QPSK sont combinés avec 78 canaux 10 Gbps NRZ-OOK et transmis sur 1000 km de fibre G.652 avec gestion de dispersion. Nous avons montré que le Co-DP-OFDM et Co-DP-QPSK ont des performances similaires après une transmission de 1000 km sur une ligne sans gestion de dispersion, et nous avons aussi montré que la transmission de ces formats sur une infrastructure de fibre deployée est possible à condition de réduire de 5 dB la puissance des canaux 10 Gbps NRZ-OOK par rapport aux canaux à100 Gbps. Ces résultats sont précieux pour la prochaine génération de systèmes WDM à 400 Gbps ou 1 Tbps. / Today the 100 Gbps coherent dual polarization quadrature phase shift keying (Co-DP-QPSK) is standardized as the industrial solution for long-haul WDM transmission. Another alternative format to DP-QPSK that permits also to reach a data rate of 100 Gbps and beyond is the coherent orthogonal frequency division multiplexing (OFDM) format. However a doubt exists over the ability of OFDM to be as efficient as QPSK for long-haul WDM transmission due to its supposed higher sensitivity to nonlinear effects . In this thesis, we have investigated the potential of Co-DP-OFDM for 100 Gbps WDM transport. The digital signal processing algorithms are detailed as well as the various experimental set-ups required to carry out and validate the 100 Gbps transceiver. We also present the transmission results obtained with several configurations. In one of these configurations, the 100 Gbps Co-DP-OFDM channel is multiplexed with forty 100 Gbps DP-QPSK channels and all these channels are transmitted over 1000 km of DCF-free G.652 fiber, while in another configuration, the Co-DP-OFDM and Co-DP-QPSK channels are combined with seventy eight 10 Gbps NRZ-OOK channels and transmitted over 1000 km of dispersion managed G.652 fiber line. We have demonstrated that OFDM and QPSK have nearly the same performance after a transmission over 1000 km, and also we have demonstrated that the transmission of these two formats over legacy fiber infrastructure is possible under the condition of decreasing by 5 dB the 10 Gbps NRZ-OOK channel power with respect to the 100 Gbps channels. The results presented in this thesis are very valuable when considering the next generation of 400 Gbps or 1 Tbps for WDM systems.
418

Mechanism of Two Homogeneous Reactions; CO Self Exchange and N2 Self Exchange

Rockwood, Alan L. 01 May 1981 (has links)
The two atom switching reactions referred to in the title were originally studied at temperatures greater than 2000°K in shock tubes by other investigators. For each reaction they proposed a direct four-center exchange mechanism in which one of the reactant molecules must be vibrationally excited, (the vibrational excitation mechanism or VEM). One of the predictions of the VEM is that molecules which are vibrationally hot but translationally cold should react through the four center transition state that leads to exchange. Using a mercury photosensitization technique, it is shown in the present work that excitation of CO to high vibrational levels is not sufficient to cause the CO self-exchange reaction. Similar attempts were also made to verify the VEM for the N2 reaction, but no exchange was observed. Kinetic modeling studies show that an atomic chain mechanism triggered by traces of oxygen impurity is responsible for all or much of the CO exchange observed in the shock tubes. Modeling studies show that many of the observed features of the N2 reaction are also correctly predicted by an atomic chain mechanism; however, the critical step in the mechanism, the N + N2 exchange reaction, has never been observed. Potential surface calculations show that at the restricted Hartree-Fock level of approximation the N3 potential surface has an energy barrier for exchange of over 80 kcal/mole, which is much too high if the atomic mechanism is to operate in the shock tubes. By comparison with similar calculations on N2o+, it is argued that the RHF calculations probably overestimate the true barrier height by about 80 kcal/mole, so the barrier to exchange on the N3 potential surface is probably no more than a few kcal/mole, and the N + N2 reaction is probably fast at high temperatures. Potential surface calculations on N4 show that the barrier to exchange through the four-center transition state is almost certainly much too high to account for the exchange observed in the shock tubes. Certain limitations on the rate law and energy barrier to exchange are derived for the VEM. It is concluded that both exchange reactions can be explained by atomic chain mechanisms and there is no need to invoke the VEM for either reaction.
419

Optimal Candidate Generation in Spatial Co-Location Mining

Lin, Zhungshan 01 May 2009 (has links)
Existing spatial co-location algorithms based on levels suffer from generating extra, nonclique candidate instances. Thus, they require cliqueness checking at every level. In this thesis, a novel, spatial co-location mining algorithm that automatically generates co-located spatial features without generating any nonclique candidates at any level is proposed. Subsequently, this algorithm generates fewer candidates than other existing level-wise, co-location algorithms without losing any pertinent information. The benefits of this algorithm have been clearly observed at early stages in the mining process.
420

The Effects of Co-Creation and Satisfaction on Subjective Well-Being

Mathis, Elaine Frances 05 June 2013 (has links)
Co-creation is centered on the idea of the consumer as a creator of value, interacting with a company to "co-create" value. As the concept of co-creation gains popularity among many industries, it is receiving increased attention from researchers. Although many topics are being researched with this new topic, one of the essential missing links is what outcomes can be expected from participation in co-creation. By identifying the relationship between co-creation, satisfaction, and subjective well-being, service providers can change strategies and implement a platform for creating unique experiences, allowing tourists to become more physically and emotionally engaged. An online survey using panel data from a commercial firm was used to gather 561 completed questionnaires. Co-creation, satisfaction, level of involvement, and subjective well-being were measured using different scales which have been adapted from previous works which are discussed in the literature review. The analysis consisted of several steps including a profile of respondents based on descriptive statistics, a simple correlation analysis of all the summated variables, and simple correctional analyses which looked at the relationships between co-creation and satisfaction, co-creation and subjective well-being, and satisfaction and subjective well-being. This study contributed to the growing body of knowledge in understanding the perceived value of tourism experiences by establishing a theory based empirical link between co-creation and subjective well-being via satisfaction. This aspect of tourism experiences had not yet before been empirically demonstrated. / Master of Science

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