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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

An integrated approach to the station - keeping problem

Daskalakis, A. January 1987 (has links)
No description available.
22

PLC Lab Station : Solution for Automatic Unloading of Paper Reels

Emil, Estlind January 2014 (has links)
Automatic control of processes is a field that has evolved extensively over theyears to reduce downtime, improve quality and increase the productivity ofprocesses in manufacturing industries. ÅF Consult is a consult organization thatprovides industrial solutions worldwide. In order to test equipment andintroduce employees and students to control systems, a PLC based lab station isnecessary. The methodology used in the project is based on a literature study,followed by the solution approach and finally an evaluation. A DistributedControl System setup using a Siemens S7-300 and a Siemens S7-400 PLC hasbeen developed. The PLCs communicate using PROFIBUS DP. The station isdivided into two major parts: a conveyor belt with transportation functionalityand a robotic arm with pick-and-place functionality. The station is providedwith equipment similar to systems currently used in paper and pulp industries.Existing solutions for unloading of paper reels in the paper and pulp industriesare non-universal due to extra equipment like pre-installed rails in trailers. Anautomated solution for unloading using a robotic arm is therefore presented,designed to reduce paper reel handling and to have the possibility to unload toany trailer. The lab station is implemented according to ÅF Consults demandsof a portable, field related station. The low budget resulted in cheap equipmentthat lack accuracy, mainly resulting in issues relating to the ability to control therobotic arm properly. The unloading solution is emulated as a lab task on thestation, showing that a control setup similar to the lab station would be a goodapproach for a real implementation solution.
23

A Revetment

Khorashahi, Fariba January 2013 (has links)
Historically, in Iran, ornament was an integral part of architecture and considered a valuable part of built form. However, in time the use of ornament suffered from the decline of figural articulation in architecture, and its status was diminished to mere decoration. In this process, ornament shifted from a pattern that was integrated with the structure to the role of revetment, from symbolic to commemorative, and from meaningfully designed to arbitrary. Investigating the changing modes of ornament to understand its significance and survival, this thesis looks at the decline of ornament from its role as a necessary structural component and/or an expressive element communicating the common values of a society into an arbitrary fragment celebrating the significant past. Traditional ornament was dependent not only on architecture but also on science, cosmology, culture, art, literature, as well as on society and its beliefs; therefore there was an intimate relationship between ornament and its context, and more importantly including the inhabitant or spectator who held those beliefs. However, today those close ties no longer exist and ornament is characterized variously as luxurious, decorative, and retrospective. This change is studied from various perspectives including historical forces, prehistory, traditional Persian cultural expression, the incursion of Islamic motifs and geometries, modernity and folk legend. To retrieve and reinstate the link between ornament and building as well as with the spectator, the thesis project engages the narrative content of ornament to re-establish these relationships. It tells its own story not in a literal way, but rather through the complex tale of the lovers in the famous historical poem (c.1190) by Nezami. The thesis narrates the epic romance of Farhad and Shirin within a love triangle with its superb pictorial cues for depiction. The story unfolds through a series of architectures and architectural representations and images. The theme and motifs of the poem imply transition (both spiritual and physical) that corresponds to the transformative mode of ornament par excellence. The ornamental manifestation of the depicted poem is applied in a subway station which is in itself the locus of transition in our contemporary lives. The architectural details of the design project are fragments of the selected episodes from the story.
24

Abandoned train station redevelopment

Liu, Xiaohong, Sharon, January 2009 (has links)
Thesis (M. L. A.)--University of Hong Kong, 2009. / Includes special report study entitled: Ecological restoration of gravel field. Includes bibliographical references. Also available in print.
25

WTMJ-FM, the Milwaukee Journal FM station, 1939-1966

Sterling, Christopher H., January 1967 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1967. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
26

The origin and development of radio broadcasting at the University of Wisconsin to 1940

Penn, John Stanley, January 1959 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1959. / Typescript. Abstracted in Dissertation abstracts, v. 19 (1959) no. 11, p. 3054. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 464-488).
27

Contribution à l'évaluation des différentes formes des métaux dans des milieux condensés riches en matières organiques : application à une chaîne de traitement de boues de station d'épuration.

Bles, Nicolas. January 1900 (has links)
Th. 3e cycle--Toxicol.--Paris 5, 1982. N°: 47.
28

Development of method for providing simultaneous metering accuracy and power output from a dual secondary station service voltage transformer

Wallace, David 07 August 2020 (has links)
Station Service Voltage Transformer (SSVT) is a special class of single-phase high voltage instrument transformer with a power winding and optional metering winding at the secondary. The SSVT is capable of being connected directly to the transmission line and providing 120 to 480 V at the secondary power terminals and 115 V at the metering terminals. The power rating of the secondary is normally anywhere from 25 kVA up to 333 kVA. The SSVT was initially developed as a means to provide control power in a substation without the need for stepdown and distribution transformers. Over time, the properties of the SSVT made it an ideal power source for many different applications. Today the SSVT is being installed in numerous applications around the world. Some typical applications include but are not limited to: remote cell towers, transmission tower lighting, oil and gas, mining projects, substation auxiliary power and rural electrification. In any of the listed applications, it is still necessary to acquire accurate revenue metering for the power companies to charge for power usage. In many cases this requires the installation of instrument transformers to perform the metering. Unfortunately, the metering and power windings of the SSVT cannot be operated simultaneously. When a load is applied to the power winding on the SSVT, a load current is reflected back into the primary winding. This current generates a drop in voltage through the primary reactance and resistance. It is these values which are reflected back into the metering winding. The accuracy of the metering winding will fall out of acceptable limits when the voltage drop is present. This research proposes a new method to provide both power and accurate metering, simultaneously, in a dual secondary SSVT. The accuracy of the metering winding remains essentially unaffected by the load on the power winding if the load is less than the maximum rating of the compensator. The result is a single transformer capable of replacing the functionally of two separate transformers. This new approach will have a broad impact in the development of future substation designs.
29

Experiment and Tradition: A Builder's Thoughts

Corday, Peter David 05 August 1999 (has links)
The following thesis has attempted to investigate the possibilities of an architecture based in tradition and in innovation. An architecture that neither imitates nor mimics, but one that results from construction and the nature of materials used rather than from the application of decorative elements to disguise the structure of the building. The success of a project results from the architect's conceptual understanding of the traditions of the region in which the project exists, informed by local traditions yet not illustrating a revivalist form of vernacular construction. / Master of Architecture
30

RTR Media Center Small Crescent Around A Garden

Patrick, Edward Michael 04 March 2004 (has links)
This masters project is a media center (radio and television station) for the Radio e Televisiun Rumantscha, located in Chur, Switzerland. Developed while studing at the Accademia d' Architettura under the direction of Peter Zumthor, the new media acts as a new headpiece to the historic district of Chur. Though contextual with its surroundings, the media center remains unique through its flowing interior spaces, positioning of techinical rooms and large window fields. / Master of Architecture

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