Global ETD Search

31	Biomimetic Composite T-Joints Thummalapalli, Vimal Kumar January 2011 (has links) No description available. Aerospace Engineering Aerospace Materials Automotive Engineering Automotive Materials Biology Civil Engineering Engineering Materials Science Mechanical Engineering Mechanics Naval Engineering Plant Sciences Polymers Textile Research Composites Composite T-Joints Sandwitch Structures Biomimetics Bionic
32	Leichte Platten aus Beton mit biaxialem Lastabtrag als bionische Strukturen Schnellenbach-Held, Martina, Habersaat, Jan-Eric 21 July 2022 (has links) Das Ziel des Forschungsvorhabens ist die Entwicklung von leichten, ressourcenschonenden und tragfähigen Stahlbetonplatten als bionische Struktur, die durch Adaption natürlicher Formen und Prinzipien einen naturähnlichen Kraftfluss aufweisen. Es wurden drei voneinander unabhängige bionische Stahlbetonplattenstrukturen entwickelt und hinsichtlich des Tragverhaltens untersucht. Das Forschungsprojekt gliedert sich in die drei Arbeitsphasen: 1. Untersuchung und Optimierung einer spinnennetzartigen Bewehrungsanordnung, 2. Entwicklung einer bionischen Querschnittsgestaltung an der Plattenunterseite, 3. Optimierung des Kraftflusses durch die Form und die Anordnung von Hohlkörpern im Platteninneren. Die naturinspirierte Gestaltung der Plattenunterseite führt neben der veränderten Tragstruktur zu einer innovativen Formgebung, die die überwiegend kantigen und „langweiligen“ Betonstrukturen ersetzen kann. [Aus: Forschungsanlass] info:eu-repo/classification/ddc/624 ddc:624
33	A 3D-printed Fat-IBC-enabled prosthetic arm : Communication protocol and data representation Engstrand, Johan January 2020 (has links) The aim of this thesis is to optimize the design of the Fat-IBC-based communication of a novel neuroprosthetic system in which a brain-machine interface is used to control a prosthetic arm. Fat-based intra-body communication (Fat-IBC) uses the fat tissue inside the body of the bearer as a transmission medium for low-power microwaves. Future projects will use the communication system and investigate ways to control the prosthetic arm directly from the brain. The finished system was able to individually control all movable joints of multiple prosthesis prototypes using information that was received wirelessly through Fat-IBC. Simultaneous transmission in the other direction was possible, with the control data then being replaced by sensor readings from the prosthesis. All data packets were encoded with the COBS/R algorithm and the wireless communication was handled by Digi Xbee 3 radio modules using the IEEE 802.15.4 protocol at a frequency of 2.45 GHz. The Fat-IBC communication was evaluated with the help of so-called "phantoms" which emulated the conditions of the human body fat channel. During said testing, packet loss measurements were performed for various combinations of packet sizes and time intervals between packets. The packet loss measurements showed that the typical amount of transmitted data could be handled well by the fat channel test setup. Although the transmission system was found to be well-functioning in its current state, increasing the packet size to achieve a higher granularity of the movement was perceived to be viable considering the findings from the packet loss measurements. prosthetic arm bionic arm 3D-printing intra-body communication ibc fat tissue fat-ibc arduino xbee 802.15.4 cobs cobs/r packet loss serial transmission armprotes 3D-utskrift intrakroppslig kommunikation fettvävnad paketförlust seriell överföring Communication Systems Kommunikationssystem Embedded Systems Inbäddad systemteknik Medical Materials Medicinska material och protesteknik
34	Model metropolitní optické sítě / Model of the metropolitan optical network Prudík, Jiří January 2008 (has links) The purpose of this master’s thesis is foremost to provide a simple guide how to build elements of optical metropolitan area network. The basic model consists to sequence of construction, network topology, passive and active parts. The collection contains examples of alternative technology such as Wireless LAN with different frequency. The optical network construction based on optical cable, fibres, splices, trays, adapters, connectors and active parts for example a lot of media convertor models. After that there are demonstrating type of wavelength division multiplexer used in metropolitan area network – passive planar PCL splitter. One of the passive planar splitter are used to increase optical fibre channel. At the end of the collection a simplified examples of used measurements – optical time domain reflectometry and optical fibre transmission. Contains standard protocols or reflectogram. The conclusion of this thesis summarizes costs of FTTb (Fibre To The Building) model of optical metropolitan area network in Czech republic and future contribution for society.

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