Thèses sur le sujet « Failure study »
Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres
Consultez les 50 meilleures thèses pour votre recherche sur le sujet « Failure study ».
À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.
Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.
Parcourez les thèses sur diverses disciplines et organisez correctement votre bibliographie.
Yao, Mu. « Study of mammalian heart failure ». Thesis, The University of Sydney, 1997. https://hdl.handle.net/2123/27637.
Texte intégralMa, Eason, Daniel Janson et Nhu Quynh Le. « Small Business Failures : A study of the top-managers contribution to the failure ». Thesis, Jönköping University, JIBS, Business Administration, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1155.
Texte intégralThe economical importance and value of small businesses is today recognized by scholars as well as government institutes. The small business does not only contribute with a great amount of entrepreneurial activity and innovations but also as a significant tool in creating jobs. The statistics are however displaying a negative trend in the development of small businesses with over 350.000 – 400.000 business closures every year in UK. In Sweden 35,000 new enterprises entered the market in 2001 but only 62% were still active in 2004.
There are two major factors from which all other explanations are derived from when discussing why a company fails which is the external and internal factor. From the failure model created by Sharma and Mahajan and supported by other researchers, it is known that the problem initiating the failure may have been caused by uncontrollable factors. However the most significant factor behind a failure is derived from insufficient and ineffective management in the strategic process.
In order to understand how and most importantly why the top-managers decisions and actions contributes to a business failure the study focused on exploring the strategic process in numerous of failure cases of small businesses. This understanding is further strengthened by considering the limitations and resistances in the strategic process. There is also a link between the crisis management and strategic management which further provides with valuable insights of the process. Four different small businesses were therefore investigated in the report through an inductive and semi structured approach to explore the contexts of the failures in-depth. From the analysis of the empirical data collected from the top-managers and other employees, owners or managers evidence were collected to study the top-managers contribution to the failure.
The most significant contributing factor found in the business failures were the inefficient internal and external assessments. This was further found to be directly linked to the inadequate knowledge and experience possessed by the top-manager and his staff. Nepotism was also a factor that was found to be a very contributing source to the inadequate assessments. The managers staffed by the top-manager possessed a close relationship with the top-manager and may have been hired due to this reason and not based on the required knowledge which was proven to have a significant impact on all the studied cases.
Krebs, Thomas. « Failure of consideration : a comparative study ». Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264584.
Texte intégralSchoeman, Ockert. « "Failure" : a pastoral study / O. Schoeman ». Thesis, North-West University, 2005. http://hdl.handle.net/10394/891.
Texte intégralThesis (Ph.D. (Pastoral))--North-West University, Potchefstroom Campus, 2005.
Du, Jiaji. « A fracture mechanics study of concrete failure / ». Thesis, Connect to this title online ; UW restricted, 1988. http://hdl.handle.net/1773/7060.
Texte intégralREGMI, Ram Krishna. « Study on Failure of Landslide Dam and Slope ». 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/151954.
Texte intégralWei, Yuan. « A study of software input failure propagation mechanisms ». College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/4250.
Texte intégralThesis research directed by: Reliability Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Ali, Tariq Zulfiqar. « Epidemiology of renal failure : a population based study ». Thesis, University of Aberdeen, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440595.
Texte intégralZou, Yang. « Leadership lessons from entrepreneurial failure| A phenomenological study ». Thesis, Pepperdine University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3738495.
Texte intégralSmall businesses are the backbones of the American economy and contribute nearly 46% of the U.S. gross domestic product. However, the failure rate for small businesses is high. Only half of all small businesses will be able to survive for 5 years, and only 20% of small business can survive 10 years. Failure is a common phenomenon among entrepreneurs of small businesses. This qualitative phenomenological study involved examining entrepreneurs’ perceptions of their failure experiences. The study involved exploring the impacts of failure on entrepreneurs, the valuable lessons that entrepreneurs have taken from their failure experiences, and how they have applied what they have learned into business practices. Ten participants were purposefully selected for an individual face-to-face interview. The researcher created and asked 12 open-ended interview questions during the interviews under the framework of 3 research questions. Through analysis of the data gathered from the interviewees, the findings revealed that failure has a tremendous impact on entrepreneurs’ finances, relationships, and emotions. The findings also included valuable lessons that entrepreneurs have learned from their failure experiences, including acquiring knowledge on business management, awareness of self-limitations, enhancing faith, and leading changes by setting examples and showing care to employees. The research also revealed entrepreneurs apply what they have learned from failure directly back into daily business practices. In the process, they had to accept their personal weaknesses by adapting to changes. Learning from failure is a continuous process. The lessons shared are critical to entrepreneurial growth, especially in leadership. What these entrepreneurs have learned and practiced is worth exploring in hopes of shedding light on entrepreneurial education.
Thoma, Oliver. « Learning from systems failure : a case study application ». Master's thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/9710.
Texte intégralThe thesis as a whole concerns the identification and resolution organisational issues and details research that was undertaken in a manufacturing company producing light access equipment, Castor & Ladder incorporating Forlezer (C&L inc. rorlezer). The content itself is based on 'systems thinking' which endorses a holistic approach to problem solving - as opposed to the traditional reductionist or mechanistic approaches - and it is hoped to demonstrate the value of adopting a Systems Approach in resolving problems of an organisational nature. Particularly, the aim is to incorporate the consideration of underlying issues i.e. 'soft' problems pertinent to organisational dynamics, into a coherent and rigorous problem solving approach. In this regard, the approach taken focuses primarily on generating a holistic perception of the contextual 'problem situation' faced by the organisation. The view held is that in order to achieve effective solutions, a critical requirement is to first gain comprehensive understanding of the situation and its complexity. From a research perspective, the intention is to first enrich the perceived problem situation and then only to develop a concern (or hypothesis) that adequately presents the true issues at hand. Next, the aim is to develop the relevant theory applicable and necessary to the understanding and resolution of the situation, and to subsequently apply this theory to the context. In observing the outcome, the validity of the concern, as well as the theory is verified.
Tjondronegoro, Soedjiharti. « A study of reproductive failure in dairy cattle ». Thesis, Tjondronegoro, Soedjiharti (1987) A study of reproductive failure in dairy cattle. Masters by Research thesis, Murdoch University, 1987. https://researchrepository.murdoch.edu.au/id/eprint/53179/.
Texte intégralKaczynska, Magdalena, et Marika Turpeinen. « Expatriate success or failure : A study on expatriate assumptions ». Thesis, Umeå University, Umeå School of Business, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1334.
Texte intégralThe purpose of this study is to examine the perceptions that the expatriates have on what personal characteristics a good expatriate should possess as well as their view on cross-cultural training (CCT). The study was conducted on two groups of expatriates from European companies – those who took part in some form of CCT when preparing for the assignment abroad and those who did not. The results show that some of the views are shared by both groups of the respondents. However, there are some difference in the way both groups think, which might depend on the fact that the two companies focus on different factors regarding the view on what features are important for an expatriate to have and how s/he should be prepared for the job. The three main conclusions of this study is that expatriates need to be motivated, willing and able to adjust and flexible to better acclimate themselves to new situations and environments; the family should be incorporated in the training to improve the chances of success; finally, CCT is perceived by the respondents as a good tool for expatriates going on assignment. This study can be seen as an introduction to more detailed studies on the effectiveness of CCT and decrease of expatriate failure.
Simmons, Joseph T. « Inheriting failure : an exploratory study of post-colonial Somalia ». Thesis, Monterey, California : Naval Postgraduate School, 2014. http://hdl.handle.net/10945/44668.
Texte intégral] Throughout its history, Somalia has experienced varying degrees of instability that has created an environment of chaos, war-induced famine, and given birth to terrorist groups like Al Shabaab. The legacy of colonization by Great Britain and Italy adversely affected the development of a functioning Somali state following its independence, subsequent military dictatorship, and the eventual collapse of central government in 1991. This thesis uses historical case studies, with a theoretical model proposed by Joel S. Migdal, to explain why post-colonial states (such as Somalia) often have had difficulty in establishing stability and the rule of law. Migdal’s model holds that success hinges on the distribution of social control between state institutions and civil society as they compete to create the rules that govern behavior. The northern region of Somaliland, drawing on the British approach of indirect rule, was able to reestablish stability by fostering cooperation between clan leaders and state institutions. The southern region of Somalia, influenced by the Italian authoritarian approach of direct rule, has repeatedly failed to establish cooperation between clan society and the state. This thesis provides recommendations for U.S. intervention and military operations based on the patterns and variations in stability often found in post-colonial states.
Francalanza, Adrian. « A study of failure in a distributed pi-calculus ». Thesis, University of Sussex, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426322.
Texte intégralDhaliwal, Kanwaljit. « A study of membrane choline transport and renal failure ». Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300380.
Texte intégralBandy, Veronica Tovar. « Evaluation of heart failure clinic alternative-clinician effectiveness study ». Scholarly Commons, 2008. https://scholarlycommons.pacific.edu/uop_etds/2646.
Texte intégralNassour, John. « Success-failure learning for humanoid : study on bipedal walking ». Versailles-St Quentin en Yvelines, 2012. http://www.theses.fr/2012VERSA001.
Texte intégralWe learn and develop from our experiences through continuous interactions with the world. Neurological understanding of the learning mechanisms is beginning to emerge to a level where they can be validated on robots. The Anterior Cingulate Cortex (ACC) is involved in cognitive control by acting as an early warning system for error in relation to the risk taking tendency (the Vigilance). Whereas, the Orbitofrontal Cortex (OFC) plays a role in reward loop by coding of outcomes, thus, regulating decision-making and expectation. These neural mechanisms play an underpinning role in cognitive development and learning. Furthermore, it has been shown that robust and complex motor patterns are said to originate from the spinal cord, where it is believe to process a central patterns generator (CPG). This thesis presents computational neural models, realized on a robot that can acquire and learn from experiences. A framework for success-failure learning based on the studies of ACC is presented, this learning framework provide a neural mechanism that allows the robot to learn from experiences. Based on the OFC, this success-failure learning was extended to support for coding of reward adaptively which enhance the learning to improve the robot's performance. A low-level controller based on the studies of CPG was developed to provide a diverse patterns generator for the production of motor patterns for learning. Bringing it all together, we validated the success-failures learning framework with the supports of the extended CPG on a humanoid robot, NAO, learning to walk under varying condition. The results showed that the robot was able to adapt as well as deal with disturbances
Burger, B. B. « A study of localized failure modes in brittle materials ». Master's thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/17652.
Texte intégralVasoya, Manishkumar Laxmanbhai. « Study on Tensile Failure of Highly Heterogeneous Brittle Materials ». Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066650.
Texte intégralThe development of predictive tools that bridge microscopic to macroscopic scales in brittle fracture is the key challenge of this thesis. In the context of quasi-static planar crack propagation under mode I loading, it has been shown, using first-order weight-function perturbation approaches that, for weak heterogeneities, when the material is homogeneous in the propagation direction, the Griffith’s threshold is always reached for all points of the crack front so that the effective toughness is simply equal to the average of the local toughness. Here, we address the same problem but with stronger toughness heterogeneities. In the first part, we consider a half-plane crack embedded in an infinite body or in a finite thickness plate and we extend analytically the first-order approaches to the second-order. We show that even if Griffith’s criterion is reached all over the front, the deformations of the front may induce some second-order deviation of the effective toughness from its mean value. We also perform peeling experiments that define their range of applicability. In the second part, we consider a circular crack propagating in an axisymmetric toughness map and solved the problem numerically, for any toughness contrast and heterogeneity size, by iterating the first-order formulas. For large enough heterogeneity contrast, the Griffith’s criterion can no more be reached everywhere: some points of the front are pinned by strong impurities, while some other parts advances continuously. Correspondingly, the effective toughness is shown to decrease with size and strength of heterogeneity from the average value of the local toughness down to its minimum one
Chong, Wing-hong Benjamin. « A study on HKSAR Government's enforcement policy on unauthorized building works ». Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B31967486.
Texte intégralOrchard, Carole Anne. « Administrative structures and procedures dealing with clinical failure of students in Canadian nursing programs ». Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/32300.
Texte intégralEducation, Faculty of
Educational Studies (EDST), Department of
Graduate
Yang, Shih-Ting. « Study of failure in fibrous composites subjected to bending loads ». Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA283330.
Texte intégralCarlsson, Karin. « A Study of Failure Development in Thick Thermal Barrier Coatings ». Thesis, Linköping University, Department of Management and Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10397.
Texte intégralThermal barrier coatings (TBC) are used for reduction of component temperatures in gas turbines. The service temperature for turbines can be as high as 1100ºC and the components are exposed to thermal cycling and gases that will cause the component to oxidize and corrode. The coatings are designed to protect the substrate material from this, but eventually it will lead to failure of the TBC. It is important to have knowledge about when this failure is expected, since it is detrimental for the gas turbine.
The scope of this thesis has been to see if an existing life model for thin TBC also is valid for thick TBC. In order to do so, a thermal cycling fatigue test, a tensile test and finite element calculation have been performed. The thermal cycling fatigue test and finite element calculation were done to find correlations between the damage due to thermal cycling, the number of thermal cycles and the energy release rate. The tensile test was preformed to find the amount accumulated strain until damage.
The thermal cycling lead to failure of the TBC at the bond coat/top coat interface. The measurment of damage, porosity and thickness of thermally grown oxide were unsatisfying due to problems with the specimen preparation. However, a tendency for the damage development were seen. The finite element calculations gave values for the energy release rate the stress intensity factors in mode~I and mode~II that can be used in the life model. The tensile test showed that the failure mechanism is dependent of the coating thickness and it gave a rough value of the maximum strain acceptable.
Sharifi, Tahereh. « An experimental study of catastrophic failure of liquid storage tanks ». Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/46527.
Texte intégralAdam, Johan D. « Failure diagnostic expert systems : a case study in fault diagnosis / ». Master's thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-01202010-020148/.
Texte intégralKarsten, Kathleen. « Reconciling Life Balance| A grounded theory study of overcoming failure ». Thesis, City University of New York, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3589732.
Texte intégralAcademic failure has been described as endemic in nursing education. Although, associate degree nursing programs graduate the largest number of nurses each year, the on-time graduation rate is 59%. Every semester students fail nursing courses and are required to successfully repeat the course before they can progress in the nursing program. Students who re-take a failed course are often called "repeaters." This qualitative Grounded Theory research explored the process of overcoming failure and becoming a successful student repeater. This emergent mode grounded theory study applied qualitative analysis techniques to prospectively verify and refine this emergent concept by delineating dimensions embedded in overcoming failure. Through the constant comparative method of data analysis, selective and theoretical coding, the Grounded Theory Reconciling Life Balance emerged.
Reconciling Life Balance represents the basic social-psychological process of nursing students who failed a course, repeated the course successfully and continued to complete their nursing program. Two substantive categories emerged from this data: 1) acknowledging, which included the concepts of the unexpected and failure and 2) becoming a successful repeater, which included the concepts of managing emotions, asking for help and adjusting their work-life balance. By focusing on human interaction and emotional connections, Reconciling Life Balance has the potential to transform current approaches to nursing education and facilitate student success.
Shah, Jasmine Bipin. « A numerical study into the failure of postbuckled laminated composites ». Thesis, Queen's University Belfast, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437540.
Texte intégralAwal, Ripendra. « Study on Landslide Dam Failure Due to Sliding and Overtopping ». 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/66199.
Texte intégral0048
新制・課程博士
博士(工学)
甲第14136号
工博第2970号
新制||工||1441(附属図書館)
26442
UT51-2008-N453
京都大学大学院工学研究科社会基盤工学専攻
(主査)教授 中川 一, 教授 関口 秀雄, 教授 藤田 正治
学位規則第4条第1項該当
Vallone, Amanda Marie Simmons Karla Peavy. « A study of the success and failure of apparel entrepreneurs ». Auburn, Ala, 2008. http://hdl.handle.net/10415/1446.
Texte intégralRajamanickam, Rajkumar. « Study of delamination of composite hat skin stringer interface failure ». Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18837.
Texte intégralSaine, Kathleen C. (Kathleen Chen). « College Students at Risk of Academic Failure : Neurocognitive Strengths and Weaknesses ». Thesis, University of North Texas, 1995. https://digital.library.unt.edu/ark:/67531/metadc278348/.
Texte intégralGan, Tsuey Hwa, et 甘翠華. « Study of failure analysis method and failure model for electronic devices ». Thesis, 2004. http://ndltd.ncl.edu.tw/handle/38773973322509690450.
Texte intégral元智大學
電機工程學系
92
The main purpose of failure analysis is used to assist the designers and manufacturers to analyze the factors of failure of an element and explore the solutions in order to improve the quality of the products and rise the compete ability of the industry. Therefore, how effectively to execute the failure analysis and constructing the related procedures are the main goals of this study. The present works were concentrated on the failure analysis method of the electronic devices and the construction of the failure model. The major work includes the procedure of failure analysis, experimental tools, and the solutions of related problems. In this study, we should first make understandings of the equipments and related information. Among enormous real elements, five cases were chosen to study the procedure and method for failure analysis. For constructing a suitable and useful database, the required equipments to probe the causes of failure must properly be selected. The construction of failure model is a hard work since it can affect the failure event to be occurred again or not. In this study, the data based on 1021 modules were analyzed statistically; the failure model was introduced induced in the test items of environmental testing and category of failure causes were investigated.
Chiang, Hung-Cheng, et 江宏晟. « Experimental study of dam failure process ». Thesis, 2012. http://ndltd.ncl.edu.tw/handle/12592724880743305418.
Texte intégral國立臺灣大學
土木工程學研究所
100
In this study, we discuss the dam failure pattern through experiments. The material used is composed of two particles with diameter 2mm and 9.5mm. Under the same bottom slope, we recorded the failure patterns with different inflow Q (180cm^3/s to 1640cm^3/s ) and different particles size combinations. The observed failure pattern can be classified into three categories (1) no destruction (2)progressive failure from toe (3) overtopping and(4)Comprehensive destruction . The experiment results showed that the main factor affecting how long the dam will start to fail is the inflow rate. There is a minimum flow rate for the dam to have any failure. As the course particle increases in percentage, the minimum flow rate required for failure also increases. As flow rate increases from the minimum flow rate, the toe erosion following by progressive failure occurs first. Overtopping failure will occur for even larger flow rate. If the percentage of course particle is high enough, overtopping failure will never occur.
Gouveia, Emily Louise Pole-Baker Maggioli. « Portuguese MV underground cable failure study ». Master's thesis, 2014. https://repositorio-aberto.up.pt/handle/10216/76659.
Texte intégralGouveia, Emily Louise Pole-Baker Maggioli. « Portuguese MV underground cable failure study ». Dissertação, 2014. https://repositorio-aberto.up.pt/handle/10216/76659.
Texte intégralLan, Hui-Sin, et 藍惠馨. « Business Ethics Failure—Case Study on Enron ». Thesis, 2008. http://ndltd.ncl.edu.tw/handle/84245838942779768954.
Texte intégral龍華科技大學
商學與管理研究所
96
Since 2001 Enron bankrupted, the collapse not only has brought the reform of regulation in financal market, but also has regarded business ethics in business. Business ethichs have became the required course in business school, and Enron has been the real teaching material in the course of business ethics. Even thought Enron seems caused by accounting fraud, the actual blight which conducts Enron to the destruction is the failure of business ethics under the accounting fraud. Therefore, the research mainly discusses failure of business ethics—literature analysis and index establishment, Enron—the processes and effects of Enron scandal, and the correlation of Enron and failure of business ethics—using index of failure to analyse Enron. The research applies Case Study which includes Time-Series Analysis and Index Analysis as method of research to analyse the select case—Enron. According the result of analyzing case to state the conclusion, and advance two recommendations for performing business ethics in coporate governance.
Yang, Kuo-ching, et 楊國慶. « Study of nuclear fuel cladding failure mechanisms ». Thesis, 2010. http://ndltd.ncl.edu.tw/handle/64347835755762097066.
Texte intégral國立臺灣科技大學
機械工程系
98
The delayed hydride cracking and creep rupture are the failure mechanisms of spent fuel cladding for concerns during dry storage. The regulation requires that the spent fuel be readily retrievable from the storage system, therefore, the cladding integrity during dry storage should be well demonstrated. Concerning the delayed hydride cracking, experimental data and finite element computer code are applied and hydride reorientation is considered in our analysis. For creep rupture, C* is applied in the crack stability evaluation for a 20-year period of storage. Hydride and its reorientation are considered in the analysis, various incipient cracks are assumed on either side of cladding or both sides. Different fuel temperatures are applied in the creep rupture analysis to understand the limiting storage conditions. The analysis results indicate that the cladding initial crack length and storage temperature dominate the crack stability during dry storage, while the effects of zirconium hydride appears to be minor. Cladding with incipient cracks on both sides seems to be the worst case to form a through crack, and trend of crack propagation is highly related to the storage temperature. As the spent fuel temperature decreases gradually with time in the dry storage facility, the cladding integrity is confirmed. We intend to apply the analysis methodology to the fuel in core behavior analysis. Calculations for various power ramp rates to simulate the reactor transient operations were performed in the study. The preliminary results show that fuel failure trend depends on the power rate. The strain energy density theory remains superior in the prediction of crack path and stability. Some assumptions were made in the analysis, for example, the material properties of Zircaloy such as Young’s modulus of zirconium hydride and the creep behavior with various hydride contents. Therefore, the results of spent fuel life prediction for a 20-year storage period may not be appropriate for practical application. However, the analysis methodology will be helpful to long term dry evaluation when further material test data of spent fuel cladding is available in the future. The application of an improved model and strain energy density theory to fuel in-core performance especially the outside-in cracking failure mechanism is expected and will be left for further study.
Hsieh, Hsiu-Ching, et 謝秀青. « Hotel industry case study of service failure ». Thesis, 2013. http://ndltd.ncl.edu.tw/handle/91259303262464525945.
Texte intégral國立雲林科技大學
企業管理系碩士班
101
This purpose of this study is to propose a constructive suggestion on enhancing both service quality and customer satisfaction to avoid and prevent service failure might take place. By adopting the case study method, the object of this study is the customer of one Taiwanese Chains Boutique Hotel. Based on investigating consumers’ perception and analyzing virtual customers’ complaint, we, therefore, induced the causes of customers’ complaint occurrence. The result showed that 1.the customer satisfaction depends on different location and different hotel attendant under the same service; 2.the varied failure recovery behaviors will influence the customer satisfaction under different kind of service failure; 3.and the personnel of service and failure recovery appears to influence the customer satisfaction under three distinct types of service failure.
Chin-MinChen et 陳近民. « Study on Seepage Failure of Landslide-Dam ». Thesis, 2014. http://ndltd.ncl.edu.tw/handle/60440932004900727303.
Texte intégral國立成功大學
水利及海洋工程學系
102
Study on Seepage Failure of Landslide-Dam Chin-Min Chen Chjeng-Lun Shieh Department of Hydraulic and Ocean Engineering, NCKU SUMMARY Landslide dams may fail due to overtopping, progressive or sudden failure of seepage. The peak discharge of flood produced by sudden failure of seepage is higher than other types. For practical application, a rapid and efficient assessment method for failure type of landslide dam is needed. By review of previous study, we conclude the factors be considered for evaluation. First, factors of overtopping and seepage failure include (a)Discharge; (b)Material properties of landslide dam; (c)Geometry of landslide dam. Second, factors of progressive and sudden failure of seepage include The Critical Stable Seepage Slope. To analyze and quantify the relation of each factor of different failure type of landslide dam, we carry out the 46 laboratory experiments. At first, discriminant function of overtopping and seepage failure is analyzed by experiment results. The correcting rate of discriminant function is 95.5%. Then, The Critical Stable Seepage Slope can evaluate seepage failure is progressive or sudden.The result have good agreement of 8 field site case. The study quantify the effect of geometry and hydrology parameters, the stability and failure type can be evaluated by quick evaluation of landslide dam. It could be helpful for emergency action of countermeasure of landslide dam. Key words: Landslide Dam, Failure Type, The Critical Stable Seepage Slope. INTRODUCTION Extreme earthquake and rainfall events may result in landslide dams. Landslide dams will block the river flow and form the lake. Landslide dams usually fail soon after the lake formation (Peng and Zhang, 2012), and cause downstream flooding. Failure type of landslide dam include overtopping, progressive and sudden failure of seepage. Although sudden failure of seepage is not common case, but the peak discharge is higher than other types.(Takahashi and Kuang, 1988; Awal et al., 2007). The main objective of this study is to evaluate failure type of landslide dam quickly by a rapid and efficient assessment method. We conclude the factors be considered for evaluation in this study, then to quantify the effect of geometry and hydrology parameters by 46 laboratory experiment results. Failure type of landslide dam can be evaluated after formation of landslide dam, it could be helpful for emergency action of countermeasure of landslide dam. MATERIALS AND METHODS By review of previous study, we conclude the factors be considered for evaluation. First, factors of overtopping and seepage failure include (a)Discharge; (b)Material properties of landslide dam; (c)Geometry of landslide dam. Second, factors of progressive and sudden failure of seepage include The Critical Stable Seepage Slope. At first, discriminant function of overtopping and seepage failure is analyzed by 46 experiment results. The correcting rate of discriminant function is 95.5%. Then, The Critical Stable Seepage Slope can evaluate seepage failure is progressive or sudden.The result have good agreement of 8 field site case. RESULTS AND DISCUSSION In figure 1, X axis and Y axis are dimensionless parameters. Overtopping and seepage failure separated well by ( )( ), the factor was combined with discharge and landslide dam shape. Equation of discriminant function is , the correcting rate is 95.5%. And seepage failure can be evaluated by , when the factor increase gradually, progressive failure of seepage was transformd into sudden failure of seepage. Figure 2 is a rapid assessment method of landslide dam failure type. Collect Geometry and Hydrology parameters of landslide dam, and calculate relevant factors as ( )( ), . Then the result of landslide dam failure type can be provided after formation of landslide dam. CONCLUSION The study quantify the effect of geometry and hydrology parameters in failure type by 46 laboratory experiments. And the discriminant function of overtopping and seepage failure is based on experiment result, the correcting rate is 95.5%. Then seepage failure is progressive or sudden can be evaluated by The Critical Stable Seepage Slope. The failure type of landslide dam can be evaluated immediately by the rapid assesment method, then it could provide a plausible results after formation of landslide dam.
Lin, Chia-Chi, et 林家吉. « Study of failure mechanism in dental implant abutment ». Thesis, 2007. http://ndltd.ncl.edu.tw/handle/84944193914167196875.
Texte intégralHsuan-Hui, Tang, et 唐玄蕙. « FORENSIC CASE STUDY OF REINFORCED SOIL STRUCTURE FAILURE ». Thesis, 2005. http://ndltd.ncl.edu.tw/handle/46049332501869536058.
Texte intégral中華大學
土木工程學系碩士班
93
ABSTRACT The uses of reinforced soil structures (RSS) technology have been increasing rapidly for the past decade in Taiwan. However, the frequency of the structure failure has also increased as well. These incidents are not only directly jeopardizing the relevant facilities around the structure but also distressing the confidences of many potential clients to some extent on the safety and the applications of RSS. This research collected eleven cases of failure for RSS around northern Taiwan that occurred within the past three years. These cases were then compiled with those reported in the literature for qualitative forensic investigations. The most often causes of RSS failure along with their evidences and mechanisms were explored and studied. The results of the research indicated that the observed primary symptoms of the RSS failure in Taiwan are face deformation, crest settlement, rupture of reinforcement, and base instability. The most common failure mechanisms are external overall slope instability and bearing failure. Based on the forensic diagnosis of the observed RSS failures, intense rainfall was the most important natural factor for RSS failure. The imperfection of each engineering practice also was relevant to the occurrence of failure. However, inadequate planning and poor construction workmanship appeared to have the worst effect on the RSS failures. The study showed that the failures of RSS were primarily due to insufficient essential trainings on the traditional slope stability analysis and design rather than the deficiency of RSS professional know-how. Based on forensic analysis of case studies, the wetting-induced strength reduction caused by the intense rainfall has significant effect on the RSS failure. Comparisons of the safety factor for slope stability analysis under stormy conditions were made using the strength reduction method and the full groundwater method. The results indicated that the safety factor estimated by the former was only about 50% of that determined by the latter. Thus, further studies are recommended to explore the effect of the different analysis method on the determination of the safety factor for slope stability under stormy conditions. Cross examinations were conducted for the effect of erroneous analysis and poor construction on the RSS failure. The results have shown that poor construction workmanship has post the most significant effect. The rehabilitation of RSS considers not only the facts that caused the failure but also all probable factors that may affect the safety of RSS. Based on the research, the remediation of overall RSS failure should emphasize the interface stability. Either structural bearing or step-back widening can be used to improve the bonding of the reinforced structure and the original ground, and consequently reduce the risk of interface shearing failure. In addition, effective reductions of surface runoff and seepage also will significantly improve the stabilization of RSS. Case studies of either success or failure are essential for the improvement of engineering practices. The findings presented in this research provide vital information for RSS professionals. It will be significantly beneficial to the technical development and safety improvement for the RSS technology in Taiwan.
Yu, Ya-Chiao, et 游雅喬. « Study of Failure State for Reinforced Concrete Columns ». Thesis, 2012. http://ndltd.ncl.edu.tw/handle/b6tf3p.
Texte intégral國立臺北科技大學
土木與防災研究所
100
The 80% maximum lateral force of hysteresis loops, which is obtained from a cyclic loading test, is often used to define the ultimate failure state of a reinforced concrete specimen. In this study, the ultimate failure state for a reinforced concrete specimen is characterized by the concept of a cyclic energy dissipation rate since a reinforced concrete specimen usually displays hysteresis energy dissipation. In fact, the ultimate failure state is defined as the maximum value of the cyclic energy dissipation per unit length, which is obtained from the total energy dissipated in a cycle divided by the sum of the maximum imposed displacements in both the push and pull directions of the corresponding cycle. To confirm the appropriateness of the proposed definition of the ultimate failure state, the data of cyclic loading test results were collected and analyzed to obtain the ultimate failure state for each specimen. In general, both methods can provide a good correlation in determining the ultimate displacement and thus ductility.
伊德娜. « Case Study of the Failure of E-Tailers ». Thesis, 2013. http://ndltd.ncl.edu.tw/handle/4z2b9g.
Texte intégralKuo, Yao-Lin, et 郭耀琳. « Study of Failure Behavior of Chemical Adhesive Anchors ». Thesis, 1998. http://ndltd.ncl.edu.tw/handle/01328075958547326948.
Texte intégralWENG, BO-XIN, et 翁博信. « A STUDY OF SYSTRM FAILURE DETECTION AND ISOLATION ». Thesis, 1990. http://ndltd.ncl.edu.tw/handle/18542157257493705754.
Texte intégral國立臺灣大學
機械工程研究所
79
A new concept for solving the failure detection and isolation (FDI)problems in a linear system, which is called Parity-Cost algorithm, has been develope. A parity function is used to generate the residual of the measurement system by projecting the redundancy data from the measurement domain into an orthogonal subspace, which is called parity domain. The basic property of the parity fuction is a least square error estimator, the format is so general that it can deal with both direct redundancy and analytical redundancy problems. The decision process of the FDI problem is done by using the model cost analysis through the energy concept. The model cost method developed is a quadratic form of the parity function. A residual which is generated by the parity function will be treated as the external source toexcite the analytical model. By definition, if there are no residual leakage from the model, the the energy quantity is at minimum or zero level. Using the decomposition property of the model cost method, the total model cost is treated as a linear combination of the component cost. The fractuation of the level of the component cost shows the possibility of the occurance of failure. To decide when and where the failure occur, the method can directly detect it by the comparison of the presetted threshold and the level of the component cost. To demonstrate the application and merit of the above method, the FDI process of dirct redundancy measurement system and the analytical redundancy system combined with sensors and actuators have been presented. Also, a comparison of the detection time for the target tracking problem of a dual-bandwidth Kalman filter and the Parity-Cost method is done. The method developed in this thesis has following five merits: 1) Handle the FDI problems for both the direct and the analytical redudancy systems easily. 2) Solve the FDI problems combined with sensors and actuators simultaneously. 3) Have the capability to detect the abrupt change of target tracking problems. 4) Simplify the parity function generation process, without using the voting system. 5) Quantify the failure events, without lossing the stochastic property. 本文提出一種新的概念以解決處理系統失效偵測與鑑識之問題,同位函數技巧被用於 系統失效偵測及殘餘值產生器。其運作之基本觀念為複置量測儀器功能正常與否,可 經由一轉換矩陣,將其投射至所謂同位空間上,則在量測空間上之失效訊息將清楚的 以向量顯現於同位空間上。這些外顯之量,恰如同最小平方誤差估測法所得之殘餘值 。模式成本分析法將得來之殘餘值再行處理,以能量之計量觀點,將表示於同位空間 上之殘餘向量轉換為能量表示式。利用來自模式成本分析之特性,可得其單獨各元件 之成本變化量,藉以進行失效之鑑識工作。此種結合同位函數暨模式成本分析以處理 系統失效偵測與鑑識之方法,於本文稱為同位──模式成本分析法。 引用本法去處理直接複置量測系統和解析複置量測系統中感知器和(或)致動器失效 偵測與鑑識之研究,得知其為一種深具彈性變化之解答工具,能隨機轉換而不失其一 般性。應用於線上處置,將可同時兼顧感知器和致動器之失效偵測與鑑識工作;對於 多重失效偵測與鑑識工作亦可勝任。其另一特色為數量化的顯示失效發生的確實時機 ,因而加速檢驗過速。本文中亦嘗試應用解決火控系統中雙頻卡爾曼濾波器追蹤目標 物之逃逸切換時機,以簡化其運算判定過程,而不失其精確性。 總結本法可獲致之效用為:1 )能將解答直接複置系統及解析複置系統之失效偵測與 鑑識問題單純化;2 )能同時處理系統中感知器和致動器失效之偵測與鑑識工作;3 )能應用於目標逃逸之追蹤偵測問題上;4 )簡化同位函數之製造過程,可不必再倚 賴選舉系之協助,便能執行;5 )將數量化觀念應用於系統之失效偵測,可使其更易 於辨識,而不背離其系統之隨機特性。
Liu, Yu-sheng, et 劉又升. « Study of The Failure Behavior of Rock Toppling ». Thesis, 2013. http://ndltd.ncl.edu.tw/handle/72254388865711010578.
Texte intégral國立臺灣科技大學
營建工程系
101
This study focuses on the toppling failure in the regular joint using the two-dimensional simulation program, UDEC. Six steps of phase were selected based on the tensile failure development of rock slope. The comparisons of the distribution of maximum and minimum stress as well as the displacement in vertical and horizontal direction were mainly discussed. Since the discontinuities cause toppling failure, considering the joint stiffness is one of the most important parameters to affect the joint behavior, therefore, this study selected three different joint stiffness ratio (kn/ks=5/1, 10/1 and 20/1) with three steep dipping dip angles of joint (60°,70° and 80°) to analyze discuss the engineering behavior of toppling failure. The analytical results show that in these select conditions, tensile failures developed through the slope toe tend to extend toward the perpendicular direction of joints. Especially for the steepest dipping of joint (α=80°), the development of tensile crack first occurs in the range of the slope surface and the joints of slope crest, then the tension fracture zones start to extend again after it becomes thicker.
Huang, Hsin-Fu, et 黃信富. « Experimental Study on Overtopping Failure of Landslide Dams ». Thesis, 2012. http://ndltd.ncl.edu.tw/handle/87562125614703594973.
Texte intégral國立交通大學
土木工程學系
101
This study focuses on flume experiment to demonstrate the overtopping failure of landslide dam, and the purpose of this experiment is to observe and record the failure process. In the experiment, dam crest receives uniform erosion without encountering breach, so it can be considered as full-section erosion, i.e., one-dimensional mobile-bed process. Using the images captured by digital video camera, we discuss stage hydrograph, stage changing rate, dam profile with time, erosive capacity, and so on. Besides, using the functional relationship between dimensionless variables, we can obtain regression equation then compare it with field cases in Japan. Experimental results show that, during the overtopping failure, reflected wave and retreated wave occur respectively. We can discern them by the highest stage change rate and the second. There is a corresponding relation between erosive capacity and stage change rate. Major erosion happens between the highest stage change rate and the second. Taking the regression equation which is obtained from experiment data, under the condition of that slope of downstream face is degree of 35.5, it can be concluded that when the dam profile is flat (B/H ≥ 7.20), the ratio value of total inflow water volume to dam volume would be larger than 1800; when the dam profile is sharp (7.20 > B/H ≥ 1.20), the ratio value would be between 240 and 1800.
Hsu, Chiung-Kun, et 許烱堃. « Study on The Failure Configuration of Offshore Breakwaters ». Thesis, 2005. http://ndltd.ncl.edu.tw/handle/03305534238399149531.
Texte intégral國立臺灣海洋大學
河海工程學系
93
The main purpose of this thesis is to investigate a special configuration of a thin offshore breakwater, which is situated in a constant depth of water and in front of a vertical wall at the straight shoreline. In this configuration of the breakwater and neglecting energy loss, it will be nearly no effects on the normally incident wave trains. We call this situation as the “failure configuration”. Based on the standing wave theory, the failure situation may be predicted and illustrated. To verify our prediction, ten types of configuration of the thin offshore breakwater (single one, two collinear, two parallel, two staggered, one perpendicular, L-shaped, Γ-shaped, U-shaped, and ㄇ-shaped offshore breakwater) have been calculated by the boundary element program in this thesis. Our prediction, this configuration will be failure in case of a thin offshore breakwater sited at the loops of standing waves, is confirmed by the numerical results. The expected function of the offshore breakwater will be lost and the engineering cost will be wasted in the failure configuration. Therefore, the achievements of this thesis could keep engineers away from such bad situations and offer some references for harbor and coastal engineering.
Chain, Kuo-Feng, et 簡國峰. « Study of Failure Cases Due to Shield Tunneling ». Thesis, 2003. http://ndltd.ncl.edu.tw/handle/51803261340757560833.
Texte intégral國立交通大學
土木工程系
91
In this paper, fourteen cases associated with failures of shield tunnels have been collected and discussed. Based on the experience accumulated, it is hoped that the designers and contractors will not make similar mistakes again. In the first part of this paper, case histories associated with the construction of shield tunnels at Bangkok, Mexico City, Washington D.C., Los Angeles, Romania Bucharest and England Kingston-upon-Hull are studied. In the latter part of this paper, geological conditions, causes of failure, and remedial works related to the shield tunnelling of Taipei MRT Hsintien Line lot CH221 and Panchiao Line lot CP261, CP262 ,CD266 are investigated. Base on the studies, major causes of failure of soft ground tunnels can be summarized as follows. 1. Choosing inappropriate construction method. For the tunnelling project at Mexico City, such as using an open-type shield in a very soft soil layer, and proceeding the tunneling construction under no soil improvement. 2. For the tunnelling project at CD266, the effect of the jet-grouting could be influenced by the following factors: (1)Poor quality of the ground improvement operation.(2)Variability of the subsurface could caused discontinuity and inefficient diameter shape in the jet-grouting soilcrete at the departure and arriving sections for the shield machine. (3)The vibration caused by excavation of the station could formed some cracks between the jet-grouting soilcrete and the diaphragm wall for shield tunneling.(4)The vibration caused by break through of the diaphragm wall for shield tunnelling could be a highly dangerous operation and might form some cracks in the jet-grouting soilcrete. (5)The presence of buried driftwoods could also caused discontinuity in the jet-grouting soilcrete.
Su, Cheng-Hsien, et 蘇振賢. « Case Study on Slope Failure andTheir Influence Factor ». Thesis, 2018. http://ndltd.ncl.edu.tw/handle/a57hpt.
Texte intégral國立中興大學
水土保持學系所
106
73% of land area in Taiwan is categorized as mountainous area with a high population density. Due to its complex geology, steep terrain, concentrated rainfall, and many typhoons and earthquakes, the natural environment of the slopes is extremely sensitive to the external distrubance. As a consequence of improper development in recent years, disasterous events of slopeland are increasing. The main purpose of this study is to investigate the causes of slopeland disasters of three engineering case histories. The main factors affecting slope stability are rainfall, earthquake, geo-material, topography and human disturbance. It is hoped that through comprehensive analysis of thses three engineering case histories, we can explore how to effectively adopt appropriate construction methods for the stability and remediation of hillsides. This study collects case histories of hillside disasters occurred in foreign countries in the past five years, and summarizes three case histories which are suitable to be used as references for disaster prevention in Taiwan. Case-1: Kedarnath, Uttarakhand, India flood disaster in 2013, Case-2 Large-scale collapse of Oso Town, Washington, USA in 2014, and Case-3 Abi-Barak village collapsed in Afghanistan in 2014. According to the occurrence time, spatial background and geology of the three disasterous events, the most important causes trigging the disasters are analyzed individually. The causes of the disasters are all related to the factores cause instability of the slopes, such as rainfall, geology, topography and man-made disturbance. Finally, after interpreting the most important causes of disasters in various cases and integrating the analysis results, several proposes to impove disaster prevention techniques and early warning system are raised as a reference in practical applicationon and early warning work and it is also expected that the disasters in the future can be significantly reduced.