62 research outputs found
Estimation and tests for power-transformed and threshold GARCH models
No full textConsider a class of power transformed and threshold GARCH(p,q) (PTTGRACH(p,q)) model, which is a natural generalization of power-transformed and threshold GARCH(1,1) model in Hwang and Basawa (2004) and includes the standard GARCH model and many other models as special cases. We ¯rst establish the asymptotic normality for quasi-maximum likelihood estimators (QMLE) of the parameters under the condition that the error distribution has ¯nite fourth moment. For the case of heavy-tailed errors, we propose a least absolute deviations estimation (LADE) for PTTGARCH(p,q) model, and prove that the LADE is asymptotically normally distributed under very weak moment conditions. This paves the way for a statistical inference based on asymptotic normality for heavy-tailed PTTGARCH(p,q) models. As a consequence, we can construct the Wald test for GARCH structure and discuss the order selection problem in heavy-tailed cases. Numerical results show that LADE is more accurate than QMLE for heavy tailed errors. Furthermore the theory is applied to the daily returns of the Hong Kong Hang Seng Index, which suggests that asymmetry and nonlinearity could be present in the ¯nancial time series and the PTTGARCH model is capable of capturing these characteristics. As for the probabilistic structure of PTTGARCH(p,q), we give in the appendix a necessary and su±cient condition for the existence of a strictly stationary solution of the model, the existence of the moments and the tail behavior of the strictly stationary solution
Study of different techniques for face recognition
No full textThe most significant part of face recognition is the input representation. This refers to the transformation of the intensity map to a form of input representation that allows easy and effective extraction of highly discriminative features. The next stage is classification. Although this is an important stage, the popular techniques and their strengths are fairly similar to each other. As such, the choice of classification algorithm does not affect the recognition accuracy as much as input representation. Input representation is the major factor that differentiate face recognition algorithms. It can be approached in 2 manners: a geometrical approach that uses spatial configuration of the facial feature, and a more pictorial approach that uses image-based representation. In this paper a set of different face recognition algorithms are reviewed, and the best practices in this domain are studied and verified
Options in Rasing the Quality of Life Jackets in the Manufacturing Process of Lade OÜ
No full textAntud lõputöö kirjutamise aluseks on võetud õmblusettevõte Lade OÜ. Kuna tänapäeval on ettevõtete turg lai ning nii ettevõtetele kui ka klientidele on olulised kvaliteetsed tooted ja kliendirahulolu, siis käesoleva töö eesmärgiks oli välja selgitada, millised tegurid mõjutavad antud ettevõtte tootmisprotsessi ning pakkuda välja, kuidas seda paremaks muuta. Lõputöö autor soovis leida võimalusi tootmisprotsessi mõjutavate kõrvalekallete vähendamiseks, et tõsta ettevõtte toodete kvaliteeti. Töö teoreetilises osas andis autor ülevaate kvaliteeti puudutavatest faktoritest. Kvaliteet on mõiste, mis tänapäeval on muutunud üha olulisemaks ning millele ettevõtte arengus üha enam tähelepanu pööratakse. Lõputöös käsitleti lisaks ka teemasid nagu kvaliteedijuhtimine tootmisprotsessis, kvaliteedinõuded ja normdokumendid ning praaktoodangu kontroll. Rakendamaks teooriat töö praktilises osas, tutvub autor ettevõtte Lade OÜ tegevuse ja kvaliteedipoliitikaga. Eesmärgi saavutamiseks uuris töö autor ettevõtte 2016. aasta automaatseid päästeveste, nende toodangu mahtu ning seda, kui palju esines ettevõttel praaki. Praagi kogused leidis autor kõikide toodetavate automaatsete päästevestide mudelite kohta ning tõi välja ka peamised praagi tekkimise põhjused. Uurimismeetodina kasutati kvantitatiivset andmeanalüüsi. Ettevõtte mittevastavuslehtede läbitöötamisel leidis autor praagi põhjuste kogused nii arvuliselt kui ka protsentuaalselt. Lõputöö autor tõi grupeeritult välja põhjused, millest on tingitud ebaõnnestunud tooted. Tulenevalt sellest tehti parendusettepanekuid eesmärgiga vähendada praak-päästevestide osakaalu. Olulise aspektina võib välja tuua, et kogu aasta jooksul oli kõige sagedasemaks praagi põhjuseks asjaolu, et keevitusprotsessi käigus jäi toote keevitus vigaseks. Teiseks märkimisväärseks põhjuseks saab tuua vigase ballooni, mis on päästevesti automaatse avanemise juures olulisim element. Lisaks vajab mainimist asjaolu, et ettevõttes on kasutusel standard ISO 9001:2000, mis on juba kaks korda oma versiooni uuendanud, viimaseks versiooniks on EN ISO 9001:2015. See aga tähendab seda, et kasutusel olev ISO standard küll eksisteerib, kuid oma versioonilt on see aegunud. Sellisel juhul on mõistlikuks teguviisiks oma kvaliteedijuhtimise protsess lähtuvalt uuest standardist ära uuendada, et väljastada uus sertifikaat. Vanema verisooni standardi kasutamine ei ole keelatud, kuid uuemat standardit kasutavad ettevõtted on klientidele tunduvalt usaldusväärsemad ning loovad paremad kvaliteedi tulemused. Käesoleva lõputöö tulemusena tegi autor ettepanekud, mille rakendamisel on võimalik parendada peamiseid praagi põhjuseid ning muuta töö tulemused kvaliteetsemaks. Lõputöö autor arvab, et parendusettepanekuid arvesse võttes ning neid edaspidi ettevõttes rakendades, saaks ettevõte muuta kvaliteeti puudutavad standardid senisest veelgi paremaks.The present thesis is based on Lade OÜ sewing company. Since, nowadays, the business market is quite extensive and both the companies and customers alike value good-quality products and customer satisfaction, the purpose of this study was to find out which factors influence the company's production process and suggest measures to improve it. The author wanted to find ways to reduce the abnormalities which impact the production process to increase the company's quality of products. The theoretical part presented an overview of the factors which impact quality. Quality is a concept that has become increasingly important and has been brought to the centre of attention with regards to the development of the company. The study also addresses topics such as quality management in the production process, quality standards and normative documents and the detection of defective products. To implement the theory in the practical part, the author examines the operations and policy of quality at Lade OÜ. To achieve the objective, the author examined the company's automatic life jackets of 2016, their production volumes and the number of defective products. The quantity of defective products was calculated for each automatic lifejacket model in production and the main reasons for the defects were pointed out. Quantitative data analysis was used in the process. The author identified the volume of the causes of the defective products both in numbers and percentages by examining the non-compliance reporting forms. The author pointed out the causes of the defective products by groups. Suggestions for improvement were made based on the findings to reduce the proportion of defective life jackets. An important aspect is that, during the whole year, the most frequent reason for defects was that the welding process left a defective weld on the product. Another significant reason was defective cylinders, which are the most important elements for the automatic opening of a life jacket. Moreover, the company follows the standard ISO 9001: 2000, which already has two updated versions, the latest of which is EN ISO 9001: 2015. This, however, means that the ISO standard exists in the company but it is an outdated version. In that case, it is reasonable to upgrade their quality management process based on the new standards to issue a new certificate. Using the older version of the standard is not prohibited but the companies that use the latest standard seem much more reliable to the customers and create better quality results. As a result of this thesis, the author made suggestions, the implementation of which would reduce the causes of the main defects and improve the work quality. The author believes that if the proposals for improvement were taken into consideration and hereafter implemented, the company could make the standards regarding quality even better
Isaiah after the exile: The author of Isaiah 56-66 as reader and redactor of the book
No full textSince Duhm's commentary, scholars have treated Isaiah as three distinct books, thereby raising the question of how they came to be the one book now before us. Through an analysis of relevant portions of Isaiah, I define the editorial contribution lade to this process by the anonymous author associated with chapters 56-66, an author who lived after the exile and who inherited much that is now in 1-55.EThOS - Electronic Theses Online ServiceGBUnited Kingdo
An exploratory study of role blurring in multidisciplinary community health centre teams in Victoria
No full textThis thesis was scanned from the print manuscript for digital preservation and is copyright the author.
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Light-struck : metaphor and materials : sensing in the digital environment
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Researchers can access this thesis by asking their local university, institution or public library to
make a request on their behalf. Monash staff and postgraduate students can use the link in the References field
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Erosion Narratives: Applying the Narrative Policy Framework to Louisiana's Coastal Erosion Narrative
No full textSouth Louisiana has a major coastal erosion problem, exposing coastal communities to storm surge. The state is spending billions of dollars on projects that are not expected to last beyond 20 years. Research indicates that predominate stories influence problem definitions and solutions. Colten (2017) identified a shift in Louisiana's coastal erosion story between congressional meetings in 1990 and 1999. According to the author, the story shifted from coastal erosion being caused by sediment starvation and canal excavation to predominately sediment starvation. He argues such a narrative shift has occurred for the coastal master plan to gain broader acceptance from the petroleum industry. Defining the problem as a problem of canal excavation characterizes canal excavators as a villain, but defining the problem as a problem of sediment starvation shifts blame elsewhere. The Narrative Policy Framework (NPF) provides a systematic approach to measuring changes in policy narratives. This research utilizes the NPF to answer if there was a shift in the coastal erosion narrative in Louisiana and considers the implications. Content analyses of the congressional meetings mentioned above was performed. No significant change in villainization or victimization of the petroleum industry is found, and there is no significant change in the stated cause of erosion. In terms of theory, this study adds to the NPF literature by inductively identifying concepts that I argue will help generally calibrate the framework to complex policy environments
Effects of Near-Fault Translational and Torsional Ground Motions on Dynamic Response of Single-Story Buildings
No full textRotational components of ground motions, torsion about the vertical axis and rocking about the horizontal axes, have caused significant damage to engineering structures and failures to bridges. Several analytical and experimental studies have been conducted to investigate the effect of these components on structures. Rotational components of ground motions cannot be measured directly and have been measured by rotational sensors only for explosions and by strong motion arrays only for far-field seismic events. Therefore, in the absence of near-fault records of differential ground motions, the characterization, parameterization, modeling and simulation of strain, rocking, and torsional ground motions in the vicinity of the fault, as well as the systematic investigation of their effects on the dynamic response of engineering structures becomes an important issue.In this study, the dynamic ground deformations generated by Mavroeidis and Papageorgiou (2010a) for two well-documented seismic events (i.e. 1979 Imperial Valley and 1999 Izmit earthquakes) based on the discrete wavenumber representation method (Bouchon and Aki, 1977; Bouchon, 1979a) are utilized to obtain torsional and rocking ground motions and their associated distributions on the gridded region in the vicinity of each earthquake. These synthetic ground deformations are used in this study to investigate the effect of the biaxial action of recorded translational ground motions and synthetic torsional ground motions on the response of symmetric and asymmetric structures. In the current seismic deign codes and standards, this torsional ground motion accounts by the shifting of the center of mass to produce the desired results. In order to investigate the effects of torsional motions on the structural responses, a software has been developed to study the linear and nonlinear response of buildings under biaxial and torsional seismic ground excitation. The program is able to perform nonlinear time history analysis based on the force- and displacement-based formulation methods developed by Spacone (1992). The biaxial and uniaxial Smooth Hysteresis Models developed Simeonov et al. (2000) are employed to model the hysteresis behavior of elements in the context of the moment-curvature relationship. The uniaxial and biaxial smooth hysteresis behaviors of the material, similar to the widely used Bouc-Wen model are employed in this research. Various numerical approaches such as the implicit Runge-Kutta, Newton-Raphson and Newmark methods are used to solve the differential equations that govern the dynamic response of the system.Finally, parametric linear and nonlinear analyses are performed for a series of symmetric and asymmetric single-story buildings to investigate the influence of the natural and accidental torsional eccentricity on the response of structures. The structural models are subjected to bidirectional recorded translational motions and synthetic low-frequency angular accelerations from the 1979 Imperial Valley and 1999 Izmit earthquakes. In order to examine the response of structures subjected to synthetic torsional motions containing high-frequency components, the bidirectional translational records from the 1986 Taiwan earthquake at FAT-1 station and the associated synthetic torsional motion, generated by the Surface Distribution Method, are also used to conduct parametric nonlinear analysis. The equivalent accidental eccentricity is developed through the mathematical formula for structures subjected to the combination of the bidirectional translational motions and torsional ground motions. The torsional amplifications developed in structures either by accidental torsion or by synthetic ground differential deformations are not significant for the lower periods. The nonlinear behavior of the structure imposed by strength eccentricity is also explored, while the results are displayed in the biaxial Base Shear and Torque (BST) Surface, inferred for the possible collapse mechanisms regardless of the analysis results.Degree awarded: Ph.D. Civil Engineering. The Catholic University of Americ
THE REVIEW OF CHARACTER OF LADY MACBETH IN THE WORKS OF WILLIAM SHAKESPEARE
No full textThe current article discusses one of the worlds` famous works by W. Shakespeare, Lady Macbeth. The author demonstrates the character of Lady Macbeth as a construct to explore the effects of power in the hands of women and to present power as a dangerous and destructive force when combined with ambition outside of the parameters. The article covers concrete samples utterances from plays and quotes to express the inner feelings of Lade Macbeth clearly
The Review of Character of Lady Macbeth in the Works of William Shakespeare
No full textThe current article discusses one of the worlds` famous works by W. Shakespeare, Lady Macbeth. The author demonstrates the character of Lady Macbeth as a construct to explore the effects of power in the hands of women and to present power as a dangerous and destructive force when combined with ambition outside of the parameters. The article covers concrete samples utterances from plays and quotes to express the inner feelings of Lade Macbeth clearl
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