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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.
31

Hardware bidirectional real time motion estimator on a Xilinx Virtex II Pro FPGA

Iqbal, Rashid January 2006 (has links)
This thesis describes the implementation of a real-time, full search, 16x16 bidirectional motion estimation at 24 frames per second with the record performance of 155 Gop/s (1538 ops/pixel) at a high clock rate of 125 MHz. The core of bidirectional motion estimation uses close to 100% FPGA resources with 7 Gbit/s bandwidth to external memory. The architecture allows extremely controlled, macro level floor-planning with parameterized block size, image size, placement coordinates and data words length. The FPGA chip is part of the board that was developed at the Institute of Computer & Communication Networking Engineering, Technical University Braunschweig Germany, in collaboration with Grass Valley Germany in the FlexFilm research project. The goal of the project was to develop hardware and programming methodologies for real-time digital film image processing. Motion estimation core uses FlexWAFE reconfigurable architecture where FPGAs are configured using macro components that consist of weakly programmable address generation units and data stream processing units. Bidirectional motion estimation uses two cores of motion estimation engine (MeEngine) forming main data processing unit for backward and forward motion vectors. The building block of the core of motion estimation is an RPM-macro which represents one processing element and performs 10-bit difference, a comparison, and 19-bit accumulation on the input pixel streams. In order to maximize the throughput between elements, the processing element is replicated and precisely placed side-by-side by using four hierarchal levels, where each level is a very compact entity with its own local control and placement methodology. The achieved speed was further improved by regularly inserting pipeline stages in the processing chain.
32

Vuxnas syn på sin tid som familjehemsplacerade : En studie om anknytning till familjehemsföräldrar och upplevd kontakt med socialsekreteraren

Östskog, Ronja, Ångnell, Maria January 2017 (has links)
Syftet med studien är att ta reda på hur anknytningen med familjehemsföräldrarna och kontakten med socialtjänsten påverkar ett barn vid en familjehemsplacering och vidare in i vuxenlivet. Dessutom studeras även hur god anknytning främjar en familjehemsplacering och kontakten med socialtjänsten. Studien har en kvalitativ ansats och fem intervjuer med vuxna personer som bott i familjehem har genomförts. Delar av Bowlbys anknytningsteori och Antonovskys (2010) föreställning om KASAM användes vid analys av uppsatsens empiri. Resultatet visar att samtliga intervjupersoner har upplevt en trygg anknytning till familjehemsföräldrarna när de var placerade som barn. En trygg anknytning i familjehemmet grundar sig på regler, rutiner, engagemang och samhörighet mellan det placerade barnet och familjehemsföräldrarna. Barn med en otrygg anknytning får det svårare att skapa nya relationer och utveckla en trygg relation till familjehemsföräldrarna vid en familjehemsplacering. I socialtjänstlagen står det att alla barn som placeras i familjehem ska ha en socialsekreterare som kontaktperson (2015:982). Familjehemsplacerade barn behöver en socialsekreterare som de känner tillit till, för att öka möjligheterna till att utveckla bra relationer i familjehemmet och att upptäcka eventuella missförhållanden. / The purpose of this study is to examine how the connection with the foster parents and the contact with the social services affects a child during a foster care placement and later in life. Furthermore, it also examines how good connection favours a foster care placement and the contact with the social services. For the study, a qualitative method was used. Five interviews took place with adults who have, at some point during their childhood, been in foster care. Parts of Bowlbys attachment theory and Antonovskys (2010) idea of KASAM was used to analyze the study’s empirics. The result shows that all adults who got interviewed in this study felt they had good relations with the foster parents and felt safe in their presence during the time they spent in foster care. Four guidelines for a good relationship between a child and their foster parents has showed to be rules, structure, commitment and affinity. Children who feel insecure with their current relations have a harder time building new relations and will have a tough time creating good relations within the foster home. The Social Service Act demands that every child in foster care shall be assigned a social secretary (2015:982). Children who has been placed in foster care needs a social secretary that they feel they can trust, this will increase the possibility of good relations within the foster home.
33

Design kolejového vozidla městské hromadné dopravy / Design of a rail vehicle for a city transport system

Pokorný, David January 2009 (has links)
Graduation theses is about complex design of tram vehicle for citz mass transport for near future. Conception is specialized on main work of tram vehicle: ergonomics, comfort, perfect view and good traction.
34

Offentlig konst i SverigeEn studie av Egon Möller – Nielsens ”lekmaskiner” – Tufsen och Ägget

Juhlin Hoff, Maria January 2023 (has links)
No description available.
35

Placed deposits in early and middle Anglo-Saxon rural settlements

Sofield, Clifford M. January 2012 (has links)
Placed deposits have received increasing attention over the past 30 years, particularly in prehistoric British archaeology. Although disagreement still exists over the definition, identification, and interpretation of placed deposits, significant advances have been made in theoretical and methodological approaches to placed deposits, as researchers have gradually moved away from relatively crude ‘ritual’ interpretations toward more nuanced considerations of how placed deposits may have related to daily lives, social networks, and settlement structure, as well as worldview. With the exception of comments on specific deposits and a recent preliminary survey, however, Anglo-Saxon placed deposits have remained largely unstudied. This thesis represents the first systematic attempt to identify, characterize, analyse and interpret placed deposits in early to middle Anglo-Saxon settlements (5th–9th centuries). It begins by disentangling the various definitions of ‘placed’, ‘structured’, and ‘special’ deposits and their associated assumptions. Using formation process theory as a basis, it develops a definition of placed deposits as material that has been specially selected, treated, and/or arranged, in contrast with material from similar or surrounding contexts. This definition was applied to develop contextually specific criteria for identifying placed deposits in Anglo-Saxon settlements. Examination of 141 settlements identified a total of 151 placed deposits from 67 settlements. These placed deposits were characterized and analysed for patterns in terms of material composition, context type, location within the settlement, and timing of deposition relative to the use-life of their contexts. Broader geographical and chronological trends have also been considered. In discussing these patterns, anthropological theories of action, agency, practice, and ritualization have been employed in order to begin to understand the roles placed deposits may have had in structuring space and time and expressing social identities in Anglo-Saxon settlements, and to consider how placed deposition may have articulated with Anglo-Saxon worldview and belief systems.
36

Grundlagen für die Nutzwertanalyse für Verstärkungen aus textilbewehrtem Beton

Schach, Rainer, Hentschel, Manuel 03 June 2009 (has links) (PDF)
Im Rahmen des Transferprojektes sollen baubetriebliche Rahmenbedingungen und Kennwerte, die zur Beurteilung der wirtschaftlichen Anwendung des Verfahrens geeignet sind, erarbeitet werden. Untersucht werden soll die Applikation von textilbewehrtem Beton im Bereich der Sanierung und Verstärkung von großflächigen Betonbauteilen. Generell können Bauaufgaben in sehr vielen Fällen durch verschiedene Bauverfahren realisiert werden, die sich regelmäßig hinsichtlich der Kosten, der benötigten Bauzeit aber auch hinsichtlich der gelieferten Qualität und des Einflusses auf die Umwelt unterscheiden. Aus baubetrieblicher Sicht wird traditionell über den kalkulatorischen Verfahrensvergleich jenes Verfahren ermittelt, mit dem die Realisierung am wirtschaftlichsten ausgeführt werden kann. Falls qualitative Kriterien beim Verfahrensvergleich mit berücksichtigt werden sollen, stehen verschiedene Methoden zur Auswahl. Der Begriff Nutzwertanalyse wird häufig als Synonym für diese nichtmonetären Bewertungsverfahren verwendet. In diesem Sinne ist auch der Titel des Beitrages zu verstehen. Die Grundlage bilden die baubetrieblichen Rahmenbedingungen, welche im Rahmen dieses Forschungsprojektes bestimmt werden. Hierzu zählen unter anderem die Entwicklung einer Trockenmischung des zu verwendenden Betons aus der bisher verwendeten Standardrezeptur der TU Dresden und geeigneter Maschinen für die Applikation des textilbewehrten Betons.
37

Grundlagen für die Nutzwertanalyse für Verstärkungen aus textilbewehrtem Beton

Schach, Rainer, Hentschel, Manuel 03 June 2009 (has links)
Im Rahmen des Transferprojektes sollen baubetriebliche Rahmenbedingungen und Kennwerte, die zur Beurteilung der wirtschaftlichen Anwendung des Verfahrens geeignet sind, erarbeitet werden. Untersucht werden soll die Applikation von textilbewehrtem Beton im Bereich der Sanierung und Verstärkung von großflächigen Betonbauteilen. Generell können Bauaufgaben in sehr vielen Fällen durch verschiedene Bauverfahren realisiert werden, die sich regelmäßig hinsichtlich der Kosten, der benötigten Bauzeit aber auch hinsichtlich der gelieferten Qualität und des Einflusses auf die Umwelt unterscheiden. Aus baubetrieblicher Sicht wird traditionell über den kalkulatorischen Verfahrensvergleich jenes Verfahren ermittelt, mit dem die Realisierung am wirtschaftlichsten ausgeführt werden kann. Falls qualitative Kriterien beim Verfahrensvergleich mit berücksichtigt werden sollen, stehen verschiedene Methoden zur Auswahl. Der Begriff Nutzwertanalyse wird häufig als Synonym für diese nichtmonetären Bewertungsverfahren verwendet. In diesem Sinne ist auch der Titel des Beitrages zu verstehen. Die Grundlage bilden die baubetrieblichen Rahmenbedingungen, welche im Rahmen dieses Forschungsprojektes bestimmt werden. Hierzu zählen unter anderem die Entwicklung einer Trockenmischung des zu verwendenden Betons aus der bisher verwendeten Standardrezeptur der TU Dresden und geeigneter Maschinen für die Applikation des textilbewehrten Betons.
38

Seismic Retrofit of Load Bearing URM Walls with Internally Placed Reinforcement and Surface-Bonded FRP Sheets

Sabri, Amirreza 22 June 2020 (has links)
Concrete block masonry is a common building material used worldwide, including Canada. Reinforced masonry buildings, designed according to the requirements of recent building codes, may result in seismically safe structures. However, unreinforced masonry (URM) buildings designed and constructed prior to the development of modern seismic design codes are extremely vulnerable to seismic induced damage. Replacement of older seismically deficient buildings with new and seismically designed structures is economically not feasible in most cases. Therefore, seismic retrofitting of deficient buildings remains to be a viable seismic risk mitigation strategy. Masonry load bearing walls are the most important elements of such buildings, potentially serving as lateral force resisting systems. A seismic retrofit research program is currently underway at the University of Ottawa, consisting of experimental and analytical components for developing new seismic retrofit systems for unreinforced masonry walls. The research project presented in this thesis forms part of the same overall research program. The experimental component includes design, construction, retrofit and testing of large-scale load bearing masonry walls. Two approaches were developed as retrofit methodologies, both involving reinforcing the walls for strength and deformability. The first approach involves the use of ordinary deformed steel reinforcement as internally added reinforcement to attain reinforced masonry behaviour. The second approach involves the use of internally placed post-tensioning tendons to attain prestressed masonry behaviour. The analytical component of research consists of constructing a Finite Element computer model for nonlinear analysis of walls and conducting a parametric study to assess the significance of retrofit design parameters. The results have led to the development of a conceptual retrofit design framework for the new techniques developed, while utilizing the seismic provisions of the National Building Code of Canada and the relevant CSA material standards.
39

Vysokovklopn lopata devn­ tÄpky / High tipping shovel for the wood chips

ulk, Petr January 2021 (has links)
High tipping shovel, wood chips, quick coupler, shovel, high tipping shovel frame, Volvo L60H loader, wheel loader accessories, linear hydraulic motor
40

Mobilní zdroje elektrické energie / Mobile Power Sources

Kvasnička, Karel January 2020 (has links)
Charging station; PV panel; accumulator; battery; lithium; LiFePO4; Arduino

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