• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 4
  • 4
  • 1
  • 1
  • 1
  • Tagged with
  • 13
  • 13
  • 4
  • 4
  • 4
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 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.
1

A Flexible Voice Communication System for a Real-Time Mission Control Facility

Pappas, Johnny J. 10 1900 (has links)
International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California / Due to the complexity of real-time missions, an increasing number of participants, and the critical nature of test missions, providing a reliable, versatile voice communication network for mission support entities has become essential. A voice communication system has a direct impact on the effectiveness of every mission and the safety of mission personnel. Each participant must satisfy unique functional and operational communication requirements. This paper addresses the functional, operational, and ergonomic aspects associated with a voice communication system for the Central Control Facility (CCF) at the Air Force Development Test Center (AFDTC), Eglin AFB, Florida. The communication system was purchased from an Edwards AFB Digital Switch requirements contract.
2

Centralisation of product design and the design process for housing

Sohlenius, Ulrika January 2006 (has links)
<p>Over many years the housing industry has been criticised concerning its performance related to factors such as quality and cost. Together with the challenge of improving its capability in meeting individual customers’ needs, by means of effective production, this has resulted in a situation where companies look at other industries, such as manufacturing, in order to<i> industrialise</i> their products and processes. Swedish housing producers are today working towards finding more commonality in products and processes at the same time as the ability to deliver customized product and services is maintained or improved. In some cases this means an increase in central control of the design work carried out in project groups.</p><p>This thesis presents a study of the design process for housing at a Swedish property developer, JM AB. Interviews have been conducted with three main groups of actors (project leaders, architects and sellers) connected to ten housing developments. A survey has also been sent out to these individuals as well as to other important actors. The main objectives of these investigations were to find out major actors’ attitudes towards the increase in central control of the design work, in general terms as well as in relation to specific design objects (windows, floor plans, bathrooms and basic structure) for the housing projects.</p><p>The results show that the trend towards more industrialised processes by more structuring and standardising concerning design has had an effect on the design work carried out in project groups. There are positive as well as negative aspects, as well as similarities and differences in attitudes. These differences can be related to different roles as well as to geographical differences. Within this work a <i>triangle</i> has been developed for measuring and comparing different actors’ attitudes. The work further shows that adapting a more holistic view of the design process, by considering it as part of a firm’s product realisation process, could be a base for further developments</p>
3

Centralisation of product design and the design process for housing

Sohlenius, Ulrika January 2006 (has links)
Over many years the housing industry has been criticised concerning its performance related to factors such as quality and cost. Together with the challenge of improving its capability in meeting individual customers’ needs, by means of effective production, this has resulted in a situation where companies look at other industries, such as manufacturing, in order to industrialise their products and processes. Swedish housing producers are today working towards finding more commonality in products and processes at the same time as the ability to deliver customized product and services is maintained or improved. In some cases this means an increase in central control of the design work carried out in project groups. This thesis presents a study of the design process for housing at a Swedish property developer, JM AB. Interviews have been conducted with three main groups of actors (project leaders, architects and sellers) connected to ten housing developments. A survey has also been sent out to these individuals as well as to other important actors. The main objectives of these investigations were to find out major actors’ attitudes towards the increase in central control of the design work, in general terms as well as in relation to specific design objects (windows, floor plans, bathrooms and basic structure) for the housing projects. The results show that the trend towards more industrialised processes by more structuring and standardising concerning design has had an effect on the design work carried out in project groups. There are positive as well as negative aspects, as well as similarities and differences in attitudes. These differences can be related to different roles as well as to geographical differences. Within this work a triangle has been developed for measuring and comparing different actors’ attitudes. The work further shows that adapting a more holistic view of the design process, by considering it as part of a firm’s product realisation process, could be a base for further developments / QC 20101129
4

New Method of Scheduling to Enhance the Reliability and Efficiency of the High Tech and Sensitive Industries

Nojabaei, Seyedehfarzaneh January 2015 (has links)
No description available.
5

Reduced Order Controllers for Distributed Parameter Systems

Evans, Katie Allison 02 December 2003 (has links)
Distributed parameter systems (DPS) are systems defined on infinite dimensional spaces. This includes problems governed by partial differential equations (PDEs) and delay differential equations. In order to numerically implement a controller for a physical system we often first approximate the PDE and the PDE controller using some finite dimensional scheme. However, control design at this level will typically give rise to controllers that are inherently large-scale. This presents a challenge since we are interested in the design of robust, real-time controllers for physical systems. Therefore, a reduction in the size of the model and/or controller must take place at some point. Traditional methods to obtain lower order controllers involve reducing the model from that for the PDE, and then applying a standard control design technique. One such model reduction technique is balanced truncation. However, it has been argued that this type of method may have an inherent weakness since there is a loss of physical information from the high order, PDE approximating model prior to control design. In an attempt to capture characteristics of the PDE controller before the reduction step, alternative techniques have been introduced that can be thought of as controller reduction methods as opposed to model reduction methods. One such technique is LQG balanced truncation. Only recently has theory for LQG balanced truncation been developed in the infinite dimensional setting. In this work, we numerically investigate the viability of LQG balanced truncation as a suitable means for designing low order, robust controllers for distributed parameter systems. We accomplish this by applying both balanced reduction techniques, coupled with LQG, MinMax and central control designs for the low order controllers, to the cable mass, Klein-Gordon, and Euler-Bernoulli beam PDE systems. All numerical results include a comparison of controller performance and robustness properties of the closed loop systems. / Ph. D.
6

Hodnocení efektivnosti technologií pro inteligentní domácnosti / Efficiency evaluation of technologies for intelligent buildings

Parma, Lukáš January 2012 (has links)
This thesis deals with the study of home automation systems. The main goal of this thesis is to prove their effectiveness. The sample project shows how to calculate the efficiency and profitability of investment in the home automation systems. The result of this work is a methodology for determining the efficiency of investment projects into automation systems. The work is divided into two parts. The theoretical part is to provide the reader with the basic understanding of automation systems. their functionality and their advantages and disadvantages. A technical model is provided describing an automation system iNELS. The practical part describes the procedures and the outcomes of the effectiveness of the system.
7

Panic over the pub : drink and the First World War

Duncan, Robert R. G. January 2008 (has links)
My Ph. D thesis, Panic over the Pub: Drink and the First World War, considers the causes, consequences and control of popular drinking behaviour and how broader currents of social debate affected the perception of the alleged alcohol problem during the First World War, shedding new light upon government inclinations towards state control during the conflict. Within current historiography there is a consummate lack of understanding concerning the formation of opinion on the drink problem ‘from below’ and its effect upon the ‘high politics’ of the decision making procedure. My thesis considers how ‘drink’ and ‘leisure’ became increasingly contentious and a domestic problem due principally to established fears concerning working class behaviour and military failures on the Western Front. My thesis argues that moral panic, rather than factual certainties, dictated attitudes to drinking in Britain during the war. An investigation of the Central Control Board, a government body established to deal specifically with the drink problem in the exigencies of conflict, constitutes the central core of my thesis, together with an assessment of the role of Lord D’Abernon, Chairman of this organisation.
8

Změny v řízení vzdělávání v ČR na přelomu tisíciletí očima ředitelů tehdejších škol / Changes in management education in the Czech Republic at the turn of the century through the eyes of the school directors at that time

Mastík, Rudolf January 2016 (has links)
Thesis on topic " The changes in management education in the Czech Republic at the turn of the entury through the eyes of the school directors at that time" captures the abolition of central control of education in the Czech Republic from 1999 to 2004 and describes the transition to the new decentralized management system. This is a qualitative analysis, propped on interviews with experienced directors of elementary and secondary schools. In observed period, these executives both personally and professionally experienced the effects of legislative changes in education. During the research, narrative interviews were used, analysis was based on grounded theory. Causal conditions, the phenomenon of interference sectoral management, intervening conditions (risk of anomie, the politicization of education, expertise versus bureaucracy in education management, education and support of school principals) and their effects on the central category were researched. During the research, the central category became school autonomy, and it's range, including the dynamics of change in the observed period, were researched. Thesis contains a description of the researched variables and evaluation of their relations with emphasis on relations to the dominant category. The result is a hypothesis (theory) anchored in...
9

Entwicklung und Gestaltung variabler Bedienelemente für ein Bedien- und Anzeigesystem im Fahrzeug

Sendler, Jochen 25 April 2008 (has links) (PDF)
Angesichts der steigenden Anzahl von Funktionen in Fahrzeugen, insbesondere im Pkw, sind neue Bedien- und Anzeigesysteme notwendig, die eine optimale Bedienbarkeit der Funktionen sicherstellen und die Ablenkung des Fahrers von der Fahraufgabe minimieren. Im Rahmen dieser Arbeit wird dazu der Einsatz variabler Bedienelemente verfolgt, die sich der aktuellen Bedienaufgabe optimal anpassen. Ziel dieser Arbeit ist es insbesondere, Vorgehensweisen und Gestaltungsempfehlungen für variable Beschriftung von Tasten und zentrale Bedienelemente mit variabler Formcodierung für abgesetzte Bedien- und Anzeigesysteme zu erarbeiten. Unter Zuhilfenahme arbeitswissenschaftlicher Methoden wird dafür zunächst die Gestaltung variabler Beschriftung von Tasten untersucht und Empfehlungen für deren Gestaltung abgeleitet. Des Weiteren wird die Entwicklung eines zentralen Bedienelements mit variabler Formcodierung beschrieben. Dazu wird, aufbauend auf bekannten Entwicklungs- und Auswahlverfahren für Bedienelemente, eine Vorgehensweise zur Entwicklung variabler Bedienelemente vorgeschlagen. Das entwickelte variable zentrale Bedienelement wird darüber hinaus hinsichtlich seiner Bedienbarkeit und Ablenkungswirkung bewertet. Aus den Versuchsergebnissen konnten Gestaltungsempfehlungen abgeleitet werden, wie durch ein variables zentrales Bedienelement die Bedienbarkeit von abgesetzten Bedien- und Anzeigesystemen verbessert und die Ablenkungswirkung reduziert werden kann. Die Ergebnisse dieser Arbeit leisten einen Beitrag zur Entwicklung zukünftiger abgesetzter Bedien- und Anzeigesysteme und geben insbesondere Entwicklern und Gestaltern eine Hilfestellung beim Einsatz variabler Bedienelemente.
10

Entwicklung und Gestaltung variabler Bedienelemente für ein Bedien- und Anzeigesystem im Fahrzeug

Sendler, Jochen 31 March 2008 (has links)
Angesichts der steigenden Anzahl von Funktionen in Fahrzeugen, insbesondere im Pkw, sind neue Bedien- und Anzeigesysteme notwendig, die eine optimale Bedienbarkeit der Funktionen sicherstellen und die Ablenkung des Fahrers von der Fahraufgabe minimieren. Im Rahmen dieser Arbeit wird dazu der Einsatz variabler Bedienelemente verfolgt, die sich der aktuellen Bedienaufgabe optimal anpassen. Ziel dieser Arbeit ist es insbesondere, Vorgehensweisen und Gestaltungsempfehlungen für variable Beschriftung von Tasten und zentrale Bedienelemente mit variabler Formcodierung für abgesetzte Bedien- und Anzeigesysteme zu erarbeiten. Unter Zuhilfenahme arbeitswissenschaftlicher Methoden wird dafür zunächst die Gestaltung variabler Beschriftung von Tasten untersucht und Empfehlungen für deren Gestaltung abgeleitet. Des Weiteren wird die Entwicklung eines zentralen Bedienelements mit variabler Formcodierung beschrieben. Dazu wird, aufbauend auf bekannten Entwicklungs- und Auswahlverfahren für Bedienelemente, eine Vorgehensweise zur Entwicklung variabler Bedienelemente vorgeschlagen. Das entwickelte variable zentrale Bedienelement wird darüber hinaus hinsichtlich seiner Bedienbarkeit und Ablenkungswirkung bewertet. Aus den Versuchsergebnissen konnten Gestaltungsempfehlungen abgeleitet werden, wie durch ein variables zentrales Bedienelement die Bedienbarkeit von abgesetzten Bedien- und Anzeigesystemen verbessert und die Ablenkungswirkung reduziert werden kann. Die Ergebnisse dieser Arbeit leisten einen Beitrag zur Entwicklung zukünftiger abgesetzter Bedien- und Anzeigesysteme und geben insbesondere Entwicklern und Gestaltern eine Hilfestellung beim Einsatz variabler Bedienelemente.

Page generated in 0.0564 seconds