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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.
11

Multibody dynamics based simulation studies of escapement mechanisms in mechanical watch movement.

January 2008 (has links)
Fu, Kin Chung Denny. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (leaves 119-123). / Abstracts in English and Chinese. / Abstract --- p.i / 摘要 --- p.iii / Acknowledgements --- p.iv / Table of Contents --- p.v / List of Figures --- p.viii / List of Tables --- p.xi / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Objective --- p.1 / Chapter 1.2 --- Fundamental knowledge of multibody dynamics --- p.2 / Chapter 1.3 --- Escapement mechanisms --- p.5 / Chapter 1.3.1 --- Time keeping accuracy and stability factors --- p.7 / Chapter 1.3.2 --- Estimations of moment of inertia --- p.9 / Chapter 1.3.3 --- Other simulations and analyses --- p.15 / Chapter 1.4 --- Thesis outlines --- p.15 / Chapter 1.5 --- Chapter summary --- p.17 / Chapter Chapter 2 --- Multibody Dynamics --- p.18 / Chapter 2.1 --- The unilateral corner law of impact --- p.18 / Chapter 2.2 --- The Coulomb's friction --- p.19 / Chapter 2.3 --- "Slip, stick, and slip reversal phenomena" --- p.20 / Chapter 2.4 --- The coefficients of restitution --- p.20 / Chapter 2.5 --- Ways of formulating multiple contacts --- p.22 / Chapter 2.6 --- Integration procedure --- p.22 / Chapter 2.7 --- The P. Pfeiffer and Ch. Glocker's approach --- p.23 / Chapter 2.7.1 --- Kinematics calculation --- p.23 / Chapter 2.7.2 --- Configuration index --- p.26 / Chapter 2.7.3 --- Motion without contact --- p.27 / Chapter 2.7.4 --- Motion for detachment and slip-stick transition and LCP formulation --- p.27 / Chapter 2.7.5 --- Motion for impact and LCP formulation --- p.37 / Chapter 2.8 --- Solving LCP --- p.50 / Chapter 2.9 --- Chapter summary --- p.52 / Chapter Chapter 3 --- Development of the Simulation Tool --- p.54 / Chapter 3.1 --- Kinematics calculation --- p.54 / Chapter 3.1.1 --- Geometric definitions --- p.55 / Chapter 3.1.2 --- Line-to-line contact --- p.59 / Chapter 3.1.3 --- Arc-to-line contact --- p.62 / Chapter 3.1.4 --- Kinematics calculation procedures --- p.67 / Chapter 3.2 --- Obtaining the solutions --- p.72 / Chapter 3.3 --- Revised numerical treatment for LCP solving --- p.73 / Chapter 3.4 --- Integration procedure of simulation --- p.74 / Chapter 3.5 --- Verification example --- p.76 / Chapter 3.5.1 --- Classical mechanics approach --- p.76 / Chapter 3.5.2 --- Pre-calculation before application --- p.79 / Chapter 3.5.3 --- Simulation results --- p.81 / Chapter 3.6 --- Chapter summary --- p.83 / Chapter Chapter 4 --- Application to Swiss Lever Escapement --- p.84 / Chapter 4.1 --- Working principle of Swiss lever escapement --- p.84 / Chapter 4.2 --- Simulation of Swiss lever escapement --- p.87 / Chapter 4.2.1 --- Pre-calculation of kinematics --- p.88 / Chapter 4.2.2 --- Simulation results --- p.89 / Chapter 4.3 --- More simulations --- p.102 / Chapter 4.3.1 --- Theoretical optimal peak amplitudes --- p.102 / Chapter 4.3.2 --- Simulation of coaxial escapement --- p.103 / Chapter 4.3.3 --- Simulations with different simulation parameters --- p.109 / Chapter 4.3.4 --- Relation of input complexity and computational time --- p.111 / Chapter 4.4 --- Chapter summary --- p.113 / Chapter Chapter 5 --- Conclusions and Future works --- p.114 / Chapter 5.1 --- Conclusions --- p.114 / Chapter 5.2 --- Future works --- p.117 / Bibliography --- p.119
12

Standard Containers for Fresh Fruits

Coulson, C. H. 03 1900 (has links)
Published by the students of the College of Agriculture, University of Arizona.
13

"Trusting the Faithful and Discreet Slave: A Critique of the Authority of the Jehovah's Witnesses"

Butler, Lucas 31 March 2015 (has links)
Jehovah's Witnesses claim to be the sole advocates for God's truth at this point in redemptive history. Basing this belief on their interpretation of Matthew 24:45-47 and Luke 12:42-45, the Watchtower Society proclaims that their organization is led by "the faithful and discreet slave" (FDS) of the end times. This FDS is the Governing Body of the Society, which has been charged with the responsibility of providing spiritual food for Jehovah's people. According to the Witnesses, to discount the message of the FDS is to ignore the voice of God. History reveals that the identity and the message of the FDS have changed since the conception of the Watchtower organization. The movement's founder, Charles Taze Russell, was first known as the FDS of Matthew 24 but lost the title after his death when the new leader of the group shifted the identity away from an individualistic understanding to a corporate one. After proclaiming for the bulk of the organization's history that the 144,000 anointed Witnesses were the FDS, the Society recently changed their understanding of this end times' servant in 2012. Currently, the FDS is only the anointed Witness men that are serving on the Governing Body of the Society. This progressive shift in the organization's understanding of the FDS and the eventual disappearance of these anointed Witnesses continues to necessitate theological realignments, which in turn lays the apologetic groundwork for evangelism to the Jehovah's Witnesses. As redemptive history continues to unfold, the Watchtower Society will be forced to clarify or reinterpret many of their foundational teachings. Such reinvention further opens the apologetic door for evangelism among disillusioned Witnesses. When the Watchtower organization again searches to recast their leadership along with their message, authentic Christians must be ready and seeking to direct Witnesses to the unchanging message of the gospel.
14

'The last days' :

Richter, Timothy Unknown Date (has links)
Thesis (MA(Religion))--University of South Australia, 2000
15

A critique of the Jehovah's Witnesses' teaching concerning future punishment

Burris, Allen Wayne. January 1985 (has links)
Thesis (M.A.)--David Lipscomb College. Graduate Program in Bible Studies, 1985. / Includes bibliographical references (leaves 76-81).
16

INGO's and public management: the case of Human Rights Watch / INGO´s and public management: the case of Human Rights Watch

Brüggemann, Jörn Tobias January 2013 (has links)
The purpose of this master thesis was to gain more insights into the actual impact that INGOs like Human Rights Watch incorporate as part of global politics. The case of HRW proved to be a great example, which had been largely neglected by the academic analysts so far. The theoretical framework introduced important implications necessary to understand the influence of INGOs to date. Based on a constructivist thinking, it was possible to outline a global political order, which is tremendously influenced by civil society actors such as INGOs. Especially the increasing significance of norms within an internationally arena -- that is becoming more and more connected -- gives impetus to actors that base their work on these collective beliefs. The deliberative power incorporated by INGOs enables them to actually challenge nation-states as well as market representatives by transforming the public sphere thoroughly. Human Rights Watch as particular case study has been analyzed as an organization that epitomizes the power of a rising global civil society. Throughout their historical development, HRW actively contributed to the defense of human rights against repressive governments as well as other violators. Obviously, the foundation of HRW was to a tremendous extent dependent on an overall evolution of human rights within the international arena. The end of the Second World War and the Universal Declaration of Human Rights by the United Nations paved the way for human rights to become an official and crucial part of international affairs. However, it took until the mid-70s when human rights turned into a major paradigm to be followed by nation-states. With the emergence of Helsinki Watch and the consequent evolution of other watch committees, the non-governmental organization strongly engaged with repressive governments (regardless of political orientation) in various regions of the world. Analyzing the contemporary organizational structure of HRW has been a difficult task due to relatively little information available. However, one can clearly state that HRW nowadays acts as a human rights defending organization that is virtually able to respond to abuses in every corner of the world. Its eagerness to review organizational process and adjust to novel human rights issues provides HRW with a unique flexibility and a large room for operations. This is also further strengthened through the integration of HRW within the international arena when considering their consultative status at the United Nations, the platform for worldwide relevant negotiations. Their growing presence in major capitals in conjunction with effective methodological approaches frequently permits HRW employees to meet up with heads of states. The impact this might have on the domestic opposition as well as on the actual socialization of norms has been described with the help of the example from Mexico, where the government refused to deal with forced disappearances. By actively engaging on-site, HRW tremendously fostered civil society movements that were otherwise unheard and powerless. As indicated in line with the spiral model, the intervention of HRW transformed the public sphere and boosted the dialogue between public and civil society representatives. The eagerness of the Mexican government to implement changes must be perceived as a success of HRW in its pursuit to defend human rights.
17

Agee and Shame: A Psychoanalytical Reading of the Autobiographical Fiction

Collins, James January 2002 (has links)
This thesis explores the autobiographical fiction of James Agee from the perspective ofKohut's self psychology and shame studies. Chapter One provides an outline of these psychological theories and draws connections between Kohut's narcissistic personality disorder and shame, makes reference to other scholars such as Joseph Adamson, J. Brooks Bouson and Barbara Ann Schapiro who have employed these theories with such effectiveness to other authors, and discusses Agee within these contexts. Chapter Two focuses on A Death in the Family and examines how Agee's autobiographical persona suffers from a narcissistic injury and excessive shame that precedes his father's death, and explores how other family members suffer from similar disturbances. Chapter Three examines Agee's first novel, The Morning Watch, and - discusses the shame dynamics that underlie Agee's ambiguous presentation ofreligion. Chapter Four explores Agee's short autobiographical fiction from the 1940's and discusses how Agee' s response to the modem world plays an integral role in his examination of the self and interpersonal conflicts. / Thesis / Master of Arts (MA)
18

A study of the Hong Kong watch and clock assembly industry: with emphasis on the export marketing strategies.

January 1976 (has links)
Thesis (M.B.A.)--Chinese University of Hong Kong. / Bibliography: leaves 82-83.
19

Application development for smartwatches : An investigation in suitable smartwatch applications / Applikationsutveckling för smarta klockor : En undersökning inom lämpliga applikationer för smarta klockor

Isacson, Dan January 2015 (has links)
The smartwatch has been predicted to be the next big thing in the ecosystem of wearable and mobile devices. The success of the smartphone has a lot to do with the support from third party developers and their applications. This support will most likely be of utmost importance if the smartwatch is going to be successful. But what are suitable applications for this type of device? What are people's expectations and opinions on smartwatches? This thesis work delved into these matters with focus on development for the Apple Watch. This was done through an online survey that reached more than 1400 people, through a field study for one person that used the smartwatch as an air-travel tool and finally through a usability test conducted on five people that tried out several applications, most of which were developed for this project. Four different applications were implemented: a timetable application, a museum audio-guide, a game and an airline application. The results indicate that people generally expected the smartwatch to act as an extension for their smartphones and notifications seemed to be an area in which the smartwatch excelled. The results also show that there are many applicable areas the smartwatch can be used for, but that interaction with these should be kept quick and simple. This is extra important given the limited screen-size and special considerations should be taken on what content to display. / Smarta klockor har länge framstått som nästa stora insteg inom ekosystemet av mobila enheter. Succén bakom smarttelefoner har mycket att göra med det stora stödet från tredjepartsutvecklare och deras applikationer. För att smarta klockor ska nå liknande nivåer är det troligt att detta tredjepartsstöd är av stor betydelse. Men vad är lämpliga applikationer för detta format? Vad har folk för förväntningar på denna plattform? Det här arbetet har handlat om dessa ämnen med fokus på utveckling mot Apple Watch. Arbetet har gjorts genom en enkätundersökning online som nått över 1400 användare, genom en fältstudie på en person där en applikation för flygresor testats samt genom ett användartest på fem personer där dessa fått testa på ett antal applikationer för Apple Watch, varav de flesta av dessa var utvecklade för detta projekt. Totalt implementerades fyra applikationer: en tidtabellsapplikation för kommunaltrafik, en ljudguide för ett museum, ett spel och en applikation för flygresande. Resultaten visar att folk verkar förvänta sig att en smart klocka ska fungera som en förlängning av deras smarttelefon och det verkar som att notifikationer är ett väldigt bra användningsområde för formatet. Resultaten visar också att det verkar finnas många olika användningsområden för smarta klockor men att interaktioner med dessa bör vara korta och lätthanterliga. Detta är extra viktigt givet den begränsade skärmstorleken och man bör noga överväga hur och vad man presenterar för användaren.
20

Characterization of a sonified peak flow monitor

Vermeulen, M. O. 03 1900 (has links)
Thesis (MSc (Physiology))--University of Stellenbosch, 2000. / 251 leaves single sided printed, preliminary pages and numbered pages 1-151. Includes bibliography, list of appendixes, abbreviations, variables, figures and tables. Digitized at 300 dpi (OCR), using a Bizhub 250 scanner. / ENGLISH ABSTRACT: The Whistle Watch™, an innovative and commercialised peak flow monitor, inspired this study, with its abnormal and complex measuring behaviour. The Whistle Watch™ latter is an audible peak flow monitor with a threshold-activated whistle as the essential component. The whistle is calibrated for a certain flow, and then encased in a body with a variable exhaust valve to atmosphere. Using the Whistle Watch™, with the exhaust valve pre-set, executing a forced expiratory effort, the audible notification of the whistle would indicate a stable asthmatic condition at that setting. No audible notification would result in the use of medication as a preventative measure. Due to the absence of existing theories and literature on the mechanics of whistles, the Whistle Watch™ was empirically developed. This study therefore, focuses on the characterisation and consequent improved understanding ofthe mechanics ofa whistle, with the objective to monitor pulmonary function in a novel way. During this study, a novel technique was developed to determine the reed activation point, or onset of oscillation, in terms of pressure. This technique was then implemented throughout the study. The initial observation and experimentation underlined the whistle's activation sensitivity towards any irregularities of the reed surface. A statistical spread of reed activation pressures defined the reed's inherent non-linear properties. A high dependence of reed activation towards upstream geometry was noted, and a clarification hypothesis was formulated. The effect of reed dimensions on activation pressure was exposed as a complex unexplored field. Existing mathematical reed theories only accommodate steady state oscillations, whereas the completed study indicated a high sensitivity of the reed activation pressure towards different input envelopes. This sensitivity was encapsulated in a mathematical model, with initial support and proofprovided by a previous independent study. All the observed effects and phenomena had far reaching practical application towards the production and quality control ofthe Whistle Watch™. / AFRIKAANSE OPSOMMING: Whistle Watch™, 'n inoverende, kommersieel piekvloeimonitor, was die inspirasie vir die studie, deur sy abnorrnale en ingewikkelde meet-gedragskenrnerke. Laasgenoemde is 'n piekvloeimonitor met 'n fluit wat geaktiveer word by 'n vooraf vasgestelde drempel. Die fluit word gekalibreer vir 'n bepaalde vloei, waarna dit geenkapsuleer word in 'n hoofdeel met 'n veranderlike uitlaat na die atmosfeer. By die gebruik van die Whislte Watch™, met die uitlaatklep gestel op 'n voorafbepaalde vloeitempo, word 'n bepaalde ekspirasievlak verkry. Hierdie vlak het 'n hoorbare kennisgewing tot gevolg, wat 'n stabiele asmatiese toestand aandui. In die afwesigheid van 'n hoorbare respons, word medikasie as voorkornende rnaatreel vereis. Die Whislte Watch™ is empiries ontwikkel in die afwesigheid van bestaande teoriee en literatuur ten opsigte van die werking van fluite. Die fokus van hierdie studie word dus geplaas op die karakterisering van die werking van fluite, wat 'n beter begrip tot gevolg het. 'n Nuwe benadering tot die monitering van die pulrnonere funksie is dus haalbaar. Tydens die studie is 'n unieke tegniek ontwikkel om die aktiveringspunt van die riet, of die aanvang van ossilasie in terrne van druk, te bepaal. Hierdie tegniek is toe dwarsdeur die studie geiinplimenteer. Die fluit se aktiveringssensitiwiteit, in terrne van die oppervlak-onreelmatighede, van die riet was duidelik waarneembaar. Die inherente nie-liniere eienskappe van die riet is duidelik waarneembaar in rietaktiveringsdrukke. 'n Verklarende hipotese is as gevolg van 'n afhanklikheid van die rietaktiveringsdrukke relatief tot stroom-op geometrie, gestel. Die effek wat rietafinetings op aktiveringsdrukke het, was blootgel~ as 'n komplekse onontwikkelde gebied. Bestaande wiskundige rietteoriee maak slegs voosiening vir nie-fluktuerende ossilasies. Na voltooiing van hierdie studie is dit duidelik dat daar wei 'n hoe sensitiwiteit van die rietaktiveringsdrukke bestaan, met verwysing na verskillende ekspiratoriese profiele. Hierdie sensitiwiteit word vervat in 'n wiskundige model met toepaslilke ondersteuning en bewyse uit 'n vorige, onathanklike studie. Aile waarneembare phenomena het resulterende praktiese impakte ten opsigte van die produksie en gehalteversekering van die Whistle Watch™.

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