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Kamat, Rajeev Gurunath. "The principle of additivity and the proeutectoid ferrite transformation." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30682.
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This study critically examines the additivity of the proeutectoid ferrite transformation. The study has been carried out in two parts with the first part involving experimental verification of the additivity of the proeutectoid ferrite transformation and the second part a theoretical assessment of the additive nature of the ferrite transformation with the aid of mathematical models.
Austenite-to-proeutectoid ferrite transformation kinetics were measured under a number of isothermal, stepped-isothermal and continuous-cooling conditions for three plain-carbon hypo-eutectoid steel grades (AISI 1010,1020 and 1040) using a dilatometer and a Gleeble 1500 thermomechanical simulator. Isothermal transformation kinetics were characterized using the Avrami equation. The stepped-isothermal transformation tests were designed to experimentally assess the additive nature of the austenite to proeutectoid ferrite transformation by measuring transformation kinetics partially at one temperature and after a rapid temperature change to another temperature. Results on the 1010 and 1040 steels showed that the proeutectoid ferrite transformation with polygonal morphology is additive under changing temperature in that the ferrite transformation kinetics at the second temperature are quite similar to the isothermal kinetics at that temperature.
Stepped-isothermal transformation measurements were made on the 1020 steel with the resulting ferrite morphology either remaining Widmanstatten at both temperatures or changing from allotriomorph to predominantly Widmanstatten at the two temperatures. In both cases the results showed additive behavior. However, the stepped-isothermal test in which the proeutectoid ferrite was transformed to an equilibrium amount and equilibrated at the first temperature and then rapidly changed to the second temperature was not additive.
Characterizing the isothermal formation of proeutectoid ferrite in the three steels using the Avrami equation resulted in a reasonably constant value of n and the b parameter increasing with increasing transformation temperature. Early site saturation was evident in a number of test specimens.
In the second part of the study, two mathematical models with planar and spherical interface geometries were developed to theoretically assess the additivity of the proeutectoid ferrite transformation. A finite-difference numerical technique was employed to describe the austenite to ferrite diffusion controlled moving-interface problem for a system having finite boundaries. A test of additivity of the proeutectoid ferrite transformation was made by predicting the ferrite growth kinetics and the associated carbon gradients under stepped-isothermal conditions. The predictions were consistent with the observed experimental additivity of the proeutectoid ferrite transformation in the 1010 steel. The spherical model predicted isothermal ferrite growth kinetics compared more favorably with the experimentally measured kinetics of the 1010 steel than the planar model.
An unusual phase was detected in the 1020 steel. A number of tests were performed to measure the isothermal transformation kinetics of the new phase. Scanning electron microscopy (SEM) and scanning-transmission electron microscopy (STEM) were used to further investigate the structural details in this new phase. The results indicated that the new phase is a type of bainite but having some of the characteristics attributable to massive transformation products.Applied Science, Faculty of
Materials Engineering, Department of
Graduate
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Henson, Bruce E. "The policy process, culture and work relations : the transformation of intentions by educators /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841148.
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Mrozik, Donald R. Jr. "Transformative educational leadership| A ritual critique of principal practice." Thesis, Lewis University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10003577.
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This dissertation explores the need for critical transformative leaders who critique oppression within schools and have a desire for social justice. This study attempts to learn more about the principal practices that maintain or disrupt the status quo and what ritual patterns emerge in relation to the work of principals. Two public elementary school principals were observed over the course of a three-day period to better understand the challenges that critical transformative leaders face in the field of education. Four lessons emerged regarding the ritual patterns of principals studied: (a) an emphasis on solidarity, which creates ends that support status quo practices and restricts the development of dialogue centered on social justice issues, (b) the need to expose the hidden curriculum through praxis and work toward liberation, (c) a limited resistance in leadership practice, and (d) that a theoretical understanding of social justice leadership is not enough for transformation to occur in schools. The lessons learned in this study suggest that the neoliberal influences placed upon public schools and public school principals are a major obstacle preventing principals from doing critical transformative work. Furthermore, the academic coursework that principals are involved in is not a sufficient condition for doing critical transformative work. These themes suggest that there is a great need to find ways to open dialogue amongst principals, school staff, parents, and those who make policy decisions so that these groups can begin examining oppressive conditions in schools. Reflection and action against unjust policies are essential to aspects of praxis for which dialogue can be used as a vehicle for change.
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Bailey, Charles R. Kuenzli John D. "Making supportability a reality : applying the principles of organizational transformation /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA401593.
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Thesis (M.S. in Management) Naval Postgraduate School, December 2001.Thesis Advisors (s): Hocevar, Susan P. ; Eaton, Donald R. "December 2001." Includes bibliographical references (p. 75-76). Also Available online.
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Kuenzli, John D. "Making supportability a reality : applying the principles of organizational transformation." Thesis, Monterey, California. Naval Postgraduate School, 2001. http://hdl.handle.net/10945/6306.
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This study applies change management theories and models to analyze what organizational changes will best support the DOD implementation of the Armyαs policy making Supportability equal to Cost, Schedule, and Performance in all acquisition programs. Post-production support factors are a major element of the total ownership cost of defense systems. The policy will save defense dollars by increasing accuracy of total ownership cost predictions in the design phase, and improve the product delivered from acquisition programs that our war fighters will use to fight wars and win.
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Tiu, Conrado. "A qualitative study into the inner leadership of transformative California school principals." Thesis, Pepperdine University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10027828.
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The 1983 publication of A Nation at Risk gave birth to an effort to reform K-12 schools and increase student achievement all over the United States. More than 30 years later, the school reform efforts have grown into immense industries with marginal effect. Major legislation and programs have been launched throughout 3 decades, with No Child Left Behind legislation and Common Core States Standards Initiative being the latest and biggest endeavors, still with minimal outcomes. These efforts follow and run along with many years of structural changes such as Voucher, Small, Pilot, and Charter Schools. The problem of effectively transforming K-12 schools into places of high student achievement remains intractable.
The principal’s role by its unique position in the educational delivery structure and its very nature is key, and may be the single most determining factor in the failure or success of a school. There are very few studies that focus on principal leadership and its effect on student achievement outcomes. All studies and most literature on principal leadership and effectiveness put most attention on traits and observable behaviors. However, it is important to look at the inner world of principals, for this influences, if not determines, the traits and behaviors they exhibit in their leadership. There are no known studies that have focused in on the inner states and experiences of effective school principals.
This phenomenological study represents a seminal effort to study the inner experiences of principals. The participant selection was done through criterion type purposive sampling to link this study to leadership effectiveness. Only principals who were able to transform their schools from failing into successful according to the objective California State Standards of Adequate Yearly Progress were included. This sampling method also enabled the study to look deeply into the inner phenomenological experience of these transformative principals.
The study findings yielded data compelling enough to propose a conclusion of effective school transformation and proposed a model to illustrate how the inner experiences of principals fit into effective school transformation. The study also presented its implications, limitations, and recommendations for future research.
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Carvajal-Del, Mar Zunilda. "La réforme de la procédure pénale chilienne : le principe du contradictoire, pivot d’une transformation démocratique." Thesis, Paris 10, 2013. http://www.theses.fr/2013PA100123.
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En 2000, le Chili a promulgué un nouveau Code de procédure pénale qui a bouleversé les fondements de l’ancienne procédure. Cette réforme s’est appuyée sur l’idée d’une rupture totale avec la législation antérieure en faisant graviter la procédure autour de la notion clé de débat contradictoire. L’émergence de ce principe a été obtenue grâce à une répartition innovante des rôles entre les différents protagonistes du procès, notamment avec la réapparition du Ministère Public en première instance. Afin d’innerver l’ensemble du procès, le débat contradictoire se réalise à toutes les étapes de la procédure et permet d’aboutir à une décision judiciaire qui puise sa légitimité dans la participation active des parties aux débats. Toutefois, ce débat contradictoire ne peut acquérir sa pleine dimension et son effectivité maximale que grâce à l’institution de mécanismes particuliers. Ainsi, la prévention des atteintes au contradictoire est assurée par la refonte du statut des protagonistes du procès et par l’obligation du juge de motiver ses décisions. Enfin, ce sont les voies de recours qui ont été modifiées et repensées afin d’assurer l’effectivité du principe du contradictoire. Grâce à ce mouvement, le Chili a effectué une véritable révolution juridique parachevant ainsi sa transition vers la démocratieIn 2000, Chili promulgated a new Code of criminal procedure that deeply shook the foundations of the previous procedure. This reform is based on the idea of a complete change from the former legislation by having criminal procedure rotate around the key concept of adversarial debate. The development of this principle was allowed thanks to the innovative distribution of the tasks bearing on those involved in the trial, such as the appearance of the Public Prosecutor who has recovered his function of criminal prosecution, which had been so far handled by the judge. In order to affect the whole trial, the adversarial principle carries out its effects at every stage of the proceedings. It leads to a ruling that grounds its legitimacy in the active participation of the parties in the proceedings. Consequently, the law of evidence was modified and the legal hierarchy of evidence gave way to the principle of free assessment of evidence. Yet, the adversarial debate can only develop and be effective through the setting up of specific mechanisms. Therefore, a reworking of the status of the actors of the criminal proceedings has been designed to prevent any breach of the adversarial principle. Regarding the possible breaches of the adversarial principle by the judge, these are prevented by the obligation bearing on the judge to give grounds for his rulings, as well as the modification of his status. Finally, the judicial remedies were modified and rethought in order to ensure the efficiency of the adversarial principle. Thanks to this reform, Chile made a real legal revolution, thereby completing its transition to democracy
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Gandi, Appala Naidu. "Martensitic transformation in TiNi based shape memory alloys : a first principles study." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/10729.
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The martensitic transformation in TiNi-based shape memory alloys has been investigated using various theoretical methods. The direct method for ab initio lattice dynamics is used for calculating phonon dispersion relations in austenite (B2) and martensites (B19, B19′). Normal mode symmetries in a B2 crystal are determined. Vibrational modes in the B2 crystal are labelled according to symmetry properties of their polarisation vector. Normal modes with imaginary frequencies are observed at the locations of experimentally observed soft modes. While labelling normal modes, the published mode symmetry label of a soft transverse acoustic (TA2) mode with a [Mathematical formula appears here. To view, please open pdf attachment] polarisation at [Mathematical formula appears here. To view, please open pdf attachment] is corrected to Σ2. Irreducible representations of the soft modes are used for determining the order parameters for various martensitic transformation paths experimentally observed using group theoretical methods. Accuracy of the interpolated frequencies in the phonon dispersion relations is assessed by using three different supercell sizes and by calculating the elastic constants from the slopes of the acoustic branches at the Brillouin zone. Born et al. derived a relation between the force constants and elastic constants for a general crystal. Further simplification of this relation is possible for a B2 crystal because of its symmetry. This simplification is derived by applying elementary group theory. Elastic constants calculated with the simplified relation are in agreement with the elastic constants calculated from the slopes of the dispersion relations. The self-consistent ab initio lattice dynamics (SCAILD) formulation is derived for an ordered compound. Precautions that need to be taken while practically implementing this formulation are discussed. The effect of Hf or Zr addition to a binary Ti-Ni system is studied by considering one configuration at each of five compositions from 0 to 25 at.% Hf or Zr. Elastic constants are calculated following a homogeneous deformation method. Selected normal mode frequencies are calculated using the direct method.
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Tsui, Wai-kei. "The transformation of leadership from a vice-principal to a principal-to-be a case study /." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37316072.
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Tsui, Wai-kei, and 徐偉基. "The transformation of leadership from a vice-principal to a principal-to-be: a case study." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37316072.
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Khawaja, Antoun. "Automatic ECG analysis using principal component analysis and wavelet transformation." Karlsruhe Univ.-Verl. Karlsruhe, 2007. http://www.uvka.de/univerlag/volltexte/2007/227/.
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Aidanpää, Mathilda, and Mathilda Sjöberg. "Digital Transformation: Governance as a TransitionTool : A case study at a Swedish municipality." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296648.
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As society becomes increasingly digitalised, pressure is put on public organisations to keep up with technological developments. Thus, digital transformations, which is a strategic relocation of the business, have become essential for organisations. Digital transformations are associated with complexity and a high failure rate, partly due to organisational barriers and the necessity of structural changes and possessing several dynamic capabilities. Private organisations have led the way in the era of integrating technology with business, and public organisations have attempted to follow. As a result, governing inspired by private organisations have been developed for public organisations, namely new public management. However, this governing does not cover values essential for public organisations, e.g., public value, nor facilitating digital transformations. Governance that enables adaptation and responsiveness as well as creating public value is necessary, e.g., adaptive and agile governance. This thesis aims to investigate digital transformation in public organisations and the effect governing principles have on it. The study also explores the potential of adaptive governance and if digitalisation can enable municipalities to work with sustainability. To answer this, an exploratory study is conducted, which includes a case study, and a framework is constructed based on a literature review together with four in-depth interviews with scientists. The framework is then applied to the case study, consisting of 11 semi-structured interviews. The findings indicate that digital transformations of public organisations can be conducted without considering governing principles. However, governance can affect how successful the transformation is and what value creation it can bring. Using governance that does not facilitate the transformation could impact its success. Adaptive governance can solve many issues in municipal digital transformations, but may not solely be the solution. It emphasises learning and trial and-error and observes the transformation through an ecosystem perspective. However, the practical implications of it are limited as no methods exist. Thus, combinations with other governing principles may be required. Additionally, digitalisation cannot enable municipalities to achieve sustainability aims on its own. Instead, digital technologies are tools that the municipality can use to achieve sustainability. The study contributes to research by investigating the effect governing principles has on digital transformations of public organisations in a Swedish context, which previously was lacking. The framework can provide a guide and analysis tool for public organisation’s digital transformation, and shows potential to be applied in practice.När samhället blir alltmer digitaliserat pressas offentliga organisationer att hålla jämna steg med den tekniska utvecklingen. Således har digitala transformationer, som är en strategisk förflyttning av verksamheten, blivit väsentligt för organisationer. Digitala transformationer är förknippade med komplexitet och hög andel misslyckanden, delvis på grund av nödvändiga strukturella förändringar och innehav av flertalet dynamiska kapaciteter, såväl som organisatoriska hinder. Privata organisationer har lett vägen i att integrera teknik med verksamheten och offentliga organisationer har försökt följa med. Detta har resulterat i att styrningen av offentliga organisationer inspirerats av näringslivet, nämligen new public management. Denna styrning täcker dock inte värden som är viktiga för offentliga organisationer, t.ex. offentligt värde, eller underlättar digitala transformationer. Styrning som möjliggör anpassning och lyhördhet samt skapar offentligt värde är nödvändigt, exempelvis adaptiv och agil styrning. Denna uppsats syftar till att undersöka digitala transformationer i offentlig sektor och vilken effekt styrande principer har på det. Studien undersöker också potentialen för adaptiv styrning och om digitalisering kan göra det möjligt för kommuner att arbeta med hållbarhet. För att svara på detta genomförs en undersökande studie, som inkluderar en fallstudie, och ett ramverk skapas baserat på en litteraturgenomgång tillsammans med fyra djupintervjuer med forskare. Ramverket tillämpas sedan på fallstudien, bestående av elvasemistrukturerade intervjuer. Resultaten tyder på att digitala transformationer av offentliga organisationerkan genomföras utan att ta hänsyn till styrande principer, men styrningen kan påverka hur optimal transformationen är och vilket värdeskapande den kan ge. Att använda styrning som inte underlättar transformationen kan påverka hur framgångsrik den är. Adaptiv styrning har förmågan att lösa många problem som finns i kommunala digitala transformationer, men är inte enskilt lösningen. Den betonar lärande och experimenterande samt observerar transformationen ur ett ekosystemsperspektiv. De praktiska implikationerna av den är dock begränsade, då den inte innehar specifika metoder. Således kan kombinationer med andra styrande principer krävas. Därtill medför inte digitalisering att kommuner uppnår hållbarhetsmål på egen hand. Istället bör digital teknik ses som verktyg som kommuner kan använda för att uppnå hållbarhet. Studien bidrar till forskning genom att undersöka vilken effekt styrande principer har på digital transformation inom offentliga organisationer ur ett svenskt perspektiv, vilket saknas i tidigare forskning. Ramverket kan tillhandahålla ett guide- och analysverktyg för offentliga organisationers digitala transformation och visar potential att kunna användas i praktiken.
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Valverde, Carlos Roberto. "Toward a Pedagogy of Compassion: Extracting Principles of Education from Teaching a High School Multicultural Literature Class." Digital Commons at Loyola Marymount University and Loyola Law School, 2010. https://digitalcommons.lmu.edu/etd/271.
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Based on the assumption by Cochran-Smith and Lytle (1993), educational scholars need insight on the “particulars” of what works for classroom teachers within the context of their own classrooms. This dissertation is a self-study that addresses my work as a high school Multicultural Literature teacher and the impact of how my own philosophical/theoretical belief system resulted in significant transformative learning experiences for students as demonstrated in their feedback.
Using intercultural competence, value-creation pedagogy, and compassion as theoretical frameworks that encourage greater social cohesion and collective participation, I used autoethnography as my primary method of investigation to treat data through an analytical, self-reflective, and interpretive lens within the cultural context of my classes. Types of data included personal memory, self-observational, self-reflective, and external data, such as end of the year anonymous student evaluations, personal memoirs, journal entries, notes, course documents, past student assignments, personal communications, and a blog, collected from my 13 years of teaching.
By sharing and examining my ethical/moral-motivation in relation to the positive feedback from students, I demonstrate how my pedagogical interactions and relationships with students manifest through value creation/culturally responsive pedagogy, the empowered voice, intercultural dialogue, transformative learning, and the development and nurturing of empathy and compassion. The study shares personal insights into the elements and processes that contributed to the overwhelmingly positive feedback of students throughout the study. Recommendations suggest greater research and discourse in developing a pedagogy of compassion.
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Icin, Eylem B. "Central Office Leaders' Role in Supporting Principal Human Capital in a Turnaround District." Thesis, Boston College, 2018. http://hdl.handle.net/2345/bc-ir:107989.
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Thesis advisor: Martin ScanlanThis qualitative case study explored the role central office leaders played in recruiting, developing and retaining principal human capital in Lawrence Public Schools. One of the key strategies of central office transformation is the creation of assistance relationships with principals, which serves as the conceptual framework for this study. Data was gathered from interviews with central office leaders and principals as well as a document review. The results of the study found that central office leaders targeted principals with certain characteristics and recruited candidates from within and outside of the district. Central office leaders provided in-district professional development and engaged external organizations in the process. Work environment and a focus on cultivating local talent contributed to principal retention. Findings further indicated that the assistance relationships developed between central office leaders and principals contributed to principal development and retention through their impact on the work environment. Recommendations include continual examination of work environment and development of assistance relationships for their contribution to principal human capital. Future researchers may continue to contribute to the growing body of literature by examining these findings and offering a longitudinal view of this practice. This strand’s findings may provide insights into practices to recruit, develop and retain principals in low-performing districts
Thesis (EdD) — Boston College, 2018
Submitted to: Boston College. Lynch School of Education
Discipline: Educational Leadership and Higher Education
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Васильєва, Ірина, Оксана Дорошенко, and Олена Васильєва. "Удосконалення дизайн-проектування шкільної форми для дівчат на основі принципів трансформації." Thesis, Київський національний університет технологій та дизайну, 2018. https://er.knutd.edu.ua/handle/123456789/10666.
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На основі аналізу існуючих зразків форменого одягу та інших видів асортименту одягу для дівчат молодшого шкільного віку визначено типові елементи трансформації та їх основні функції. На основі результатів аналізу встановлено відповідність між ними і базовими принципами трансформації, запропоновано класифікацію видів і принципів конструктивної та технологічної реалізації функцій трансформації дитячого шкільного одягу і гардеробу, класифікацію елементів трансформації.Based on the analysis of existing samples of uniforms and other types of clothing for girls of the junior school age, typical transformation elements and their main functions identified. Based on the results of the analysis, the correspondence between them and the basic principles of transformation is established; the classification of types and principles of constructive and technological realization of functions of transformation of children's school clothes and wardrobe, classification of elements of transformation proposed.
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Khawaja, Antoun [Verfasser]. "Automatic ECG analysis using principal component analysis and wavelet transformation / von Antoun Khawaja." Karlsruhe : Univ.-Verl. Karlsruhe, 2007. http://d-nb.info/985224770/34.
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Cabrera, Vergara Cristian Jesús, and Bravo Solange Beatriz Castillo. "Análisis de los principales factores que permitieron desarrollar una eficiente transformación digital en las principales empresas del sector banca múltiple peruano." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/650437.
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Las organizaciones reconocen la necesidad de cambiar el modelo de negocio tradicional por uno cada vez más digital y ágil. Por ello, han empezado a transformarse digitalmente, buscando ser más competitivos en un entorno cambiante. Sin embargo, este proceso es relativamente nuevo, y en el Perú son pocos los que han logrado implementarlos positivamente. Por ello, cada vez hay más empresas que reconocen la necesidad de transformarse, pero que desconocen cómo hacerlo.
Esta investigación comprende la recopilación bibliográfica, realización de entrevistas, procesamiento de encuestas a los 4 principales bancos, y el análisis estadístico de los resultados para desarrollar estimaciones que permitirían conocer los principales factores que pudieron priorizarse para tener un desarrollo eficiente en este proceso. Esta investigación reúne información y analiza las percepciones de sus trabajadores para realizar estimaciones exploratorias acerca de los factores que permiten obtener un desarrollo eficiente de transformación digital.
Se realizaron entrevistas a expertos de diversos sectores y a 4 trabajadores del sector bancario. Finalmente, se realizaron 70 encuestas, de los cuales 59 fueron válidas para su procesamiento. Sin embargo, debido a las limitaciones de tiempo y confidencialidad, no se pudo obtener un tamaño mayor, impidiendo hacer un análisis concluyente a nivel estadístico que pudiera extrapolarse el resto de las empresas.
Finalmente, se identificaron 2 enfoques que permiten obtener un desarrollo eficiente en el proceso de transformación: centrarnos en el cliente y colaborador, tomando en cuenta las limitaciones externas e internas durante proceso y reconociendo el objetivo o razón que los lleva al cambio.Organizations recognize the need to change the traditional business model for a more digital and agile one. Therefore, companies have begun to transform digitally, seeking to be more competitive in a changing environment. However, this process is relatively new, and in Peru few have managed to implement it positively. This research includes bibliographic compilation, interviews, processing surveys to workers of the 4 main banks in Peru, and the analysis to develop statistical estimations that could make us recognize the main factors that should be prioritized to have an efficient development in their digital transformation process. By this way, this research collect data from the main banks in Peru and analyze opinions and perceptions of their employees in order to make exploratory and descriptive estimates about the process. Research considered interviews of experts from different sectors, including members of the analyzed banks and finally 70 surveys were carried out, of which 59 were validated for processing. However, due to the time and confidentiality limitations, it was not possible to reach a larger sample size, so it did not allow us to make a conclusive analysis at a statistical level that can be used as a model for the other companies. Finally, two approaches were identified in the investigation in order to obtain an efficient development of the transformation process: putting the client and the collaborator as center, considering limitations in the process and recognizing the objective that leads the change.
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Savin, Andrej. "Community principles and choice of law : the transformation of private international law in the European Union." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620952.
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Champagne-Racine, Jocelyne. "Vers une culture d'affaires coopérative : la transformation de la culture organisationnelle de la Caisse Desjardins de Granby -- Haute-Yamaska." Thèse, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/8733.
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Résumé : Cette thèse vise à décrire et explorer en profondeur la mise en œuvre d’une transformation de la culture organisationnelle de la Caisse Desjardins de Granby – Haute-Yamaska en s’assurant de rester alignée sur les valeurs et les principes coopératifs dans le contexte contemporain actuel.
La stratégie de recherche est une étude de cas unique dont les données ont été collectées en temps réel au cours d’une observation soutenue de plus de trois années. De nature qualitative, cette thèse met en évidence l’importance du renouvellement du sens de la coopération auprès des gestionnaires et des employés, notamment par des représentations nouvelles permettant d’en illustrer tout le sens. Elle propose également une meilleure compréhension des phases de la mise en place d’une culture d’affaires coopérative. Il se dégage un modèle en trois phases qui ajoute à la littérature un modèle de transformation de la culture organisationnelle d’une coopérative. Finalement, les résultats générés par cette thèse accroissent les connaissances académiques sur le rôle crucial du leader et des gestionnaires ainsi que certaines qualités requises pour bien gérer le passage à la culture d’affaires coopérative.Abstract : This thesis describes the implementation of corporate culture changes at a Desjardins credit union branch and analyses how the process was achieved while ensuring it was in line with co-operative values and principles in the current context. The research is based on a unique case study for which data was collected in real time over the course of three years of regular observation. The thesis is qualitative in nature and shows the importance of instilling a renewed sense of co-operation among managers and employees, using new metaphors to convey its full meaning. It also stresses the need to better understand the different stages for building a co-operative business culture and provides a three-phrase model for transforming corporate culture within a co-operative business, which adds to the body of work on the topic. Furthermore, the case study provides better information on the crucial role played by the leader and managers and on essential qualities for a successful transition to a co-operative business culture.
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Grant, Lisa Marie. "How Does a Principal Use Intention and Strategy in the Enactment of Advocacy Leadership." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4681.
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District and school leadership are essential to the success of our students and our schools. While extensive conceptual literature describes leadership characteristics, there are few empirical studies that address the daily reality of schools. In addition, additional research is needed describing how principals maneuver within the context of schools and school districts. This phenomenological study explored how one elementary school principal understands and enacts leadership and to what extent she employs intentional strategies to facilitate change. The purpose of the study was to offer a rich profile of one elementary school principal's practice to understand how a principal constructs meaning, deploys action, and employs strategies to affect change. The results reveal this principal uses vision, the intentional strategies of expectations, modeling, decision-making processes, reflection, authentic conversations, and stories to facilitate change within her school. In addition, she maintains a human resource focus establishing relationships and building capacity in others as leadership strategies. The principal did not employ the same intention or strategies in relationship to the district or community, however. Results further indicated the district is also acting as a barrier to the implementation of leadership for change. Results of this study have implications for practitioners and future research. Practitioners can employ similar strategies as well as gaining awareness of the importance employing intention and political skill with the district. The results also highlight the need for additional leadership research as well as research investigating the role of the district in support of schools.
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Charochak, Suzanne M. "Central Office Leaders' Role in Supporting Principal Autonomy and Accountability in a Turnaround District." Thesis, Boston College, 2018. http://hdl.handle.net/2345/bc-ir:107995.
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Thesis advisor: Martin ScanlanThis qualitative case study explored the role of central office leaders in supporting autonomy and accountability in the Lawrence Public Schools. One of the key strategies of central office transformation is the creation of assistance relationships with principals (Honig et al., 2010), which serves as the conceptual framework for this study. Data was gathered from interviews with and observations of central office leaders and principals as well as a document review. The results of the study found that principals were granted broad autonomy in several areas of school leadership that resulted in improved student outcomes. Findings further noted that central office leaders engaged in assistance relationships and employed the key practices in their efforts to support principals. Principals reported that central office leaders employed these practices in each of the four decision-making areas of building leadership; budget, staffing, curriculum and assessment, and scheduling. While enacting autonomy for principals in building decision-making, central office leaders executed a “customer-service culture” of support. Recommendations include continual examination of assistance relationships among central office leaders in support of principals’ autonomy in the context of a turnaround district. Future researchers may continue to contribute to the growing body of literature by examining these findings and offering a longitudinal view of this practice. This strands’ findings may begin to provide insights into strategies that will add to school improvement efforts for chronically underperforming schools and districts
Thesis (EdD) — Boston College, 2018
Submitted to: Boston College. Lynch School of Education
Discipline: Educational Leadership and Higher Education
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Ludwig, Germain D. "Using adult education perspective transformation principles in the evaluation of training program proposals for the economically disadvantaged /." Access Digital Full Text version, 1994. http://pocketknowledge.tc.columbia.edu/home.php/bybib/11625910.
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Thesis (Ed. D.)--Teachers College, Columbia University, 1994.Includes tables. Typescript; issued also on microfilm. Sponsor: William T. Vericker. Dissertation Committee: Professor Matthias Finger. Includes bibliographical references (leaves 191-202, 314-320) and index.
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Ntho-Ntho, Albertina Maitumeleng. "School principals mediating change : the case of religion in education." Thesis, University of Pretoria, 2013. http://hdl.handle.net/2263/33001.
Full textAbstract:
It has been the desire of the ANC government ever since it came to power in 1994 to develop
a unity of purpose and spirit that cherishes and celebrates the diverse nature of the South
African population in terms of culture, language and religion and to transform existing
inequalities that are deep-rooted in South African educational history and religion in
particular. In order to satisfy this desire, a whole plethora of legislation and policies was
developed. Amongst the developments entailed in these laws and policies were religious
rights and freedoms guaranteed to all South Africans as well as the establishment of
democratic structures vested with powers to govern schools while school principals manage
them. In terms of education legislation, one of the functions of the governing body of a
school is to develop and adopt a school policy on religion (as per the study) which is
accordingly implemented by the school principal. It is in the policy implementation stage that
the school principal is expected to play a mediating role and resolve possible conflicts
erupting due to different religious interestThis study is based on the assumption that the management and leadership training they
received and the position they hold as school managers and leaders, enabled participating
school principals to mediate the implementation of new religion policies. The research
question driving this study was “How do school principals deal with implementation of the
National Policy on Religion and Education in schools?” Informed by this question the focus
of the study was to explore “how principals describe and experience their mediating role in
implementing the religion policy within an existing religious context in schools”. Following a
qualitative research approach a phenomenological research design was employed in order to
understand and describe the meaning of the lived, felt and narrated experiences of school
principals. Data were collected by means of narrative interviews where twelve school
principals pursuing postgraduate studies with the University of Pretoria and who have been in
education for at least ten years, told their religion in education stories. These stories were
subsequently transcribed, analysed and interpreted to determine the impact of principals’ past
religious experiences and their management training on their implementation of religion
policies at their schools. This study found that in dealing with the National Policy on Religion and Policy (2003)
implementation in schools, participating principals ignore the policy in preference of
maintaining the status quo. When faced with conflicts related to religious interests, they
partially sub-contracted into the policy. They did not seem to consider transformative
mediation as a possible leadership strategy for conflict resolution in the existing religious
context of schools. The study also found that amongst these principals, there were those who
displayed a confident attitude, values of openness, generosity and integrity and had used their
past religious experiences to transform the quality of conflict interaction in schools. My
recommendation in this regard would therefore be threefold. One, Higher Education
Institutions should provide appropriate training by introducing suitable courses that will yield
adequate knowledge, skills and opportunities for professional attitude, value attainment and
determination for continuous learning and development to principals as key change agents.
Two, there is a need for these organizations to re-evaluate and re-organise existing courses
for better recognition of transformative mediation as a leadership strategy to conflict
resolution in schools. The provincial departments of education need to provide appropriate
training for prospective principals as part of professional development programmes to
address the essential needs pertaining to policy implementation that could create conflict in
schools. Training in mediation of conflict would therefore be essential.Thesis (PhD)--University of Pretoria, 2013.
gm2013
Education Management and Policy Studies
unrestricted
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Malito, Bryan Frank. "Understanding the phenomenon of critical transformation within multicultural music classes as informed by the principles of critical pedagogy." Thesis, Boston University, 2014. https://hdl.handle.net/2144/13610.
Full textAbstract:
Thesis (D.M.A.)--Boston University
PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.This study focused on the socio-transformative qualities of pedagogy and the development of a critical consciousness in multicultural music education. Specifically, it examined the extent to which the principles of critical pedagogy resided within the teaching practices of immigrant world music instructors as well as the extent to which their musical praxis promoted the development of a critical conscience for students participating in world music ensemble classes. A university world music program in Ontario provided the setting, and the methodological approach for this study employed a grounded theory approach, underpinned by the theoretical framework of critical pedagogy. Observed through these lenses, world music ensemble classes presented a critical pedagogy in action. Liberated from traditional teaching practices, non-resident Canadian citizen music instructors were reborn as critical educators, allowing their students to develop into critical thinkers. Data coding from documents, journals, video recordings, structured interviews, semi-structured interviews, questionnaires, and observation constructed a grounded theory matrix. From this matrix, it became possible to develop a mid-ranged theory and theoretical framework for a critical multicultural music education. This theory elicited recommendations for implementing multicultural music education in Ontario schools and provided topics for further discussion ofthe value of critical pedagogy in music education.
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Mielke, Paula Espindola [UNESP]. "Princípios da educação ambiental nas práticas e discursos de professores do ensino fundamental." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/90049.
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Made available in DSpace on 2014-06-11T19:24:17Z (GMT). No. of bitstreams: 0
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mielke_pe_me_rcla.pdf: 2347738 bytes, checksum: e87da36343a00d365b27a3c84361b380 (MD5)A Educação Ambiental está muito presente no cotidiano escolar, apresentando uma diversidade de discursos e de práticas. Essa diversidade não seria um problema se não acarretasse também práticas conservadoras que não contribuem para a transformação da realidade. A escola, inserida no contexto da sociedade capitalista, traz, entre outras, as marcas dos princípios preconizados pela racionalidade econômica, que, dentro de um discurso homogeneizador de desenvolvimento sustentável, busca mudanças comportamentais para conservação desses princípios. As práticas de Educação Ambiental possibilitam a reprodução ou a transformação dessas condições sociais, dependendo dos princípios e concepções que os educadores possuem e praticam. Os princípios, que permeiam as práticas cotidianas, são o que regem o comportamento dos sujeitos, remetendo a uma ordem ideal e às finalidades das práticas. Documentos e autores da área apresentam vários princípios importantes em práticas de uma Educação Ambiental crítica e transformadora. Porém, no cotidiano escolar, quais são os princípios que se fazem presentes nos discursos e nas práticas das Educações Ambientais? A presente pesquisa tem como objetivo identificar os princípios que emergem de atividades de Educação Ambiental no ensino formal e as maneiras como estes aparecem. A pesquisa é de natureza qualitativa, tendo como sujeitos três professores do ensino público municipal da Cidade de Cajamar, região metropolitana de São Paulo. Os dados foram coletados a partir da análise de documentos, observações e entrevistas. A análise foi empreendida considerando-se os seguintes aspectos: (a) objetivos, (b) influências, (c) características, (d) o que o educador considera importante, e (e) regras para a sua ação. Assim, identificamos alguns princípios presentes nos discursos e nas práticas dos educadores, que indicam...
Environmental education is very present at school, presenting a diversity of discourses and practices. This diversity would not be a problem if it did not entail conservative practices that do not contribute to the transformation of reality. The school, into the context of capitalist society brings, among others, the marks of the guiding principles advocated by economic rationality, which, within a homogenizing discourse of sustainable development, seek behavioral changes to conserve these principles. The Environmental Education practices allow the reproduction or transformation of social conditions, depending on the principles and concepts that educators have and practice. The guiding principles, which permeate the daily practices, are what govern the behavior of subjects, referring to an ideal order of the practices and purposes. Documents and authors of Environmental Education present important guiding principles in practice in a critical and transformative Environmental Education. However, at school, what are the principles that are present in the discourses and practices of Environmental Educations? This research aims to identify the principles that emerge from the activities of environmental education in formal education and the ways in which they appear. The research is qualitative, with three teachers in municipal public Cajamar City, metropolitan Sao Paulo. Data were collected from document analysis, observations and interviews. The analysis was undertaken considering the following aspects: (a) objectives, (b) influences, (c) characteristics, (d) what the teacher considers important, and (e) rules for its action. Thus, we identified some principles present in discourse and practice of educators, which indicate paths that are traced in the daily activities of Environmental Education in school, these are: respect and appreciation for differences; affectivity; autonomy; care... (Complete abstract click electronic access below)
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Dunn, Valerie Michelle. "Transformative learning and teaching: Using the National Writing Project's tools and principles to prepare graduate student instructors to facilitate first-year composition." SOUTHERN ILLINOIS UNIVERSITY AT CARBONDALE, 2012. http://pqdtopen.proquest.com/#viewpdf?dispub=3498135.
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Dunn, Valerie Michelle. "TRANSFORMATIVE LEARNING AND TEACHING: USING THE NATIONAL WRITING PROJECT`S TOOLS AND PRINCIPLES TO PREPARE GRADUATE STUDENT INSTRUCTORS TO FACILITATE FIRST-YEAR COMPOSITION." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/dissertations/427.
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The National Writing Project (NWP) conducts four and five-week professional development summer workshops that K-16 expert teachers consistently praise as transformative. The central question posed in this dissertation focuses on whether the NWP workshop, based on a teachers-teaching-teachers design, could also serve as an effective professional development vehicle for transforming and preparing graduate student instructors (GSIs) to teach first-year composition. This question arises out of the need for knowledge-building graduate student preparation programs that keep pace with the increased demands of the first-year composition course and of the first-year composition students. Methods used to explore the feasibility of the NWP to prepare GSIs involve an analytic autoethnography and two survey research instruments. In the autoethnography, the researcher views the various processes experienced throughout the NWP workshop through the twin lenses of Transformation Learning (TL) theory and constructivist learning pedagogy. In the survey research, the researcher investigates the GSI participants' and local site directors' perceptions concerning the value and benefits of the NWP workshop to prepare GSIs for teaching writing. The researcher's analytic autoethnography reveals the transformative effects of the NWP experience on the teacher-frames of the researcher and of those peers attending the same NWP institute, while the surveys of the GSI participants and the local site directors reveal similarly positive effects of NWP pedagogy for preparing GSI for teaching writing. Based on these findings, combined with foundational support from the NWP meta-analysis of student writing outcomes of NWP participating teachers generated by the Local Sites Research Initiatives (LSRI), along with the independent Inverness Associates' studies focusing on the perceptions of teachers involved in the NWP's New-Teacher Initiative (NTI), the researcher recommends a pilot project involving a NWP designed pre-semester workshop for graduate student instructors prior to teaching first-year composition.
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Gilligan, Gregg T. "Central Office Leaders' Role in Supporting Principals' Instructional Expectations in a Turnaround District." Thesis, Boston College, 2018. http://hdl.handle.net/2345/bc-ir:107994.
Full textAbstract:
Thesis advisor: Martin ScanlanThis qualitative case study explored the role of central office leaders as they supported principals’ development of high instructional expectations in the Lawrence Public Schools. One of the key strategies of central office transformation is the creation of assistance relationships with principals, which serves as the conceptual framework for this study. Data were gathered from interviews with central office leaders and principals as well as a document review. The results of the study found that central office leaders employed high quality practices that strengthened principals’ instructional leadership capacity and raised instructional expectations within schools and of teachers. Principals reported that having central office support through systems and structures, curriculum, culture and working conditions created heightened instructional expectations and contributed to their growth as instructional leaders. The central office leaders and principals reported the strong culture of assistance relationships contributed to increased expectations and improved student outcomes. Recommendations include continual examination of assistance relationships among central office leaders in support of principals in the context of a turnaround district. Future researchers may continue to contribute to the growing body of literature by examining these findings and offering a longitudinal view of this practice. This strand’s findings can serve as a guide for the practice of central office leaders who are working with principals to raise and create heightened instructional expectations required for improving achievement and equity system-wide in habitually underperforming schools and districts across our country
Thesis (EdD) — Boston College, 2018
Submitted to: Boston College. Lynch School of Education
Discipline: Educational Leadership and Higher Education
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Mielke, Paula Espindola. "Princípios da educação ambiental nas práticas e discursos de professores do ensino fundamental /." Rio Claro : [s.n.], 2010. http://hdl.handle.net/11449/90049.
Full textAbstract:
Orientador: Luiz Carlos SantanaBanca: Dalva Maria Bianchini Bonotto
Banca: Sandro Tonso
Resumo: A Educação Ambiental está muito presente no cotidiano escolar, apresentando uma diversidade de discursos e de práticas. Essa diversidade não seria um problema se não acarretasse também práticas conservadoras que não contribuem para a transformação da realidade. A escola, inserida no contexto da sociedade capitalista, traz, entre outras, as marcas dos princípios preconizados pela racionalidade econômica, que, dentro de um discurso homogeneizador de desenvolvimento sustentável, busca mudanças comportamentais para conservação desses princípios. As práticas de Educação Ambiental possibilitam a reprodução ou a transformação dessas condições sociais, dependendo dos princípios e concepções que os educadores possuem e praticam. Os princípios, que permeiam as práticas cotidianas, são o que regem o comportamento dos sujeitos, remetendo a uma ordem ideal e às finalidades das práticas. Documentos e autores da área apresentam vários princípios importantes em práticas de uma Educação Ambiental crítica e transformadora. Porém, no cotidiano escolar, quais são os princípios que se fazem presentes nos discursos e nas práticas das Educações Ambientais? A presente pesquisa tem como objetivo identificar os princípios que emergem de atividades de Educação Ambiental no ensino formal e as maneiras como estes aparecem. A pesquisa é de natureza qualitativa, tendo como sujeitos três professores do ensino público municipal da Cidade de Cajamar, região metropolitana de São Paulo. Os dados foram coletados a partir da análise de documentos, observações e entrevistas. A análise foi empreendida considerando-se os seguintes aspectos: (a) objetivos, (b) influências, (c) características, (d) o que o educador considera importante, e (e) regras para a sua ação. Assim, identificamos alguns princípios presentes nos discursos e nas práticas dos educadores, que indicam... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Environmental education is very present at school, presenting a diversity of discourses and practices. This diversity would not be a problem if it did not entail conservative practices that do not contribute to the transformation of reality. The school, into the context of capitalist society brings, among others, the marks of the guiding principles advocated by economic rationality, which, within a homogenizing discourse of sustainable development, seek behavioral changes to conserve these principles. The Environmental Education practices allow the reproduction or transformation of social conditions, depending on the principles and concepts that educators have and practice. The guiding principles, which permeate the daily practices, are what govern the behavior of subjects, referring to an ideal order of the practices and purposes. Documents and authors of Environmental Education present important guiding principles in practice in a critical and transformative Environmental Education. However, at school, what are the principles that are present in the discourses and practices of Environmental Educations? This research aims to identify the principles that emerge from the activities of environmental education in formal education and the ways in which they appear. The research is qualitative, with three teachers in municipal public Cajamar City, metropolitan Sao Paulo. Data were collected from document analysis, observations and interviews. The analysis was undertaken considering the following aspects: (a) objectives, (b) influences, (c) characteristics, (d) what the teacher considers important, and (e) rules for its action. Thus, we identified some principles present in discourse and practice of educators, which indicate paths that are traced in the daily activities of Environmental Education in school, these are: respect and appreciation for differences; affectivity; autonomy; care... (Complete abstract click electronic access below)
Mestre
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Keraghel, Abdelkrim. "Étude adaptative et comparative des principales variantes dans l'algorithme de Karmarkar." Phd thesis, Grenoble 1, 1989. http://tel.archives-ouvertes.fr/tel-00332749.
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Après une description de la méthode de Karmarkar, il est montré que la valeur du pas de déplacement peut être largement améliorée. Les principales difficultés pratiques de la méthode sont discutées. Plus particulièrement, l'hypothèse de connaitre, au départ, la valeur optimale de l'objectif. Diverses extensions et variantes sont étudiées dans le but de relaxer l'hypothèse ci-dessus
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CORDEIRO, ALEXANDRE DELDUQUE. "TROIS QUESTIONS SUR LE PRINCIPE DE LA MORALITÉ ADMINISTRATIVE THÉORIE POLITIQUE, THÉORIE DU DROIT ET THÉORIE DE LA CONSTITUTION EN TRANSFORMATION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4173@1.
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La Constitution brésilienne de 1988 est riche dans sa
principiologie. Parmi les principes par rapport à
l administration, ce de la moralité est à souligner, si
bien qu il soit consideré encore aujourd hui par des
spécialistes comme un concept vague et imprécis. L objectif
de cette dissertation est ce de démontrer l existence d une
relation directe entre l adoption du principe de la moralité
administrative et les transformations dans la théorie
Politique, dans la théorie du Droit et du Droit
Constitutionnel. Le principe de la moralité administrative
est-il un simple conseil adressé aux fonctionnaires ou à un
ordre sujet à des pénalités et à des sanctions? Enfin,
l adoption du principe de la moralité publique est-elle
provenante de l ingénuité du législateur brésilien ou s agit-
elle d une proposition pragmatique de changements pour
l administration Publique au Brésil? À façon de conclusion,
nous cherchons à répondre à ces trois questions au moyen d un
étude critique des transformations vérifiées dans les
théories de la Politique, du Droit et du Droit
Constitutionnel.A Constituição brasileira de 1988 é rica em sua principiologia. Dentre os princípios dirigidos à Administração Pública destaca-se o da moralidade, que ainda hoje é considerado por alguns administrativistas um conceito vago e impreciso. Demonstrar a existência de uma relação direta entre a adoção do princípio da moralidade administrativa e as transformações na teoria Política, na teoria do Direito e na teoria da Constituição é a tônica do trabalho. É verdadeira essa afirmação? Seria o princípio da moralidade administrativa um mero conselho dirigido ao administrador público ou um comando substantivo, sujeito a penalidades e sanções? E, finalmente, a adoção do princípio da moralidade administrativa foi um arroubo de ingenuidade do constituinte brasileiro ou representa uma proposta de mudança paradigmática para a Administração Pública brasileira? A conclusão busca responder às três indagações, a partir da investigação crítica das transformações verificadas na teoria Política, na teoria do Direito e na teoria da Constituição.
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Zhong, Xiaoxia [Verfasser], Robert [Akademischer Betreuer] Slany, Robert [Gutachter] Slany, and Leila [Gutachter] Taher. "Investigating the genetic principles of hematopoietic transformation by the homeobox protein HoxA9 / Xiaoxia Zhong ; Gutachter: Robert Slany, Leila Taher ; Betreuer: Robert Slany." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2020. http://d-nb.info/1221370383/34.
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Benayada, Lahouari. "Construction d'une solution analytique et critique d'algorithmes numériques afférents aux équations de Saint Venant en vue d'application aux écoulements transitoires sur fond mobile." Toulouse, INPT, 1994. http://www.theses.fr/1994INPT007H.
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Une methode analytique de resolution des equations de saint venant linearisees qui prend en compte les pentes du fond et la ligne d'energie est construite. Cette solution etablie par l'utilisation de la transformee de laplace, met en evidence le passage de la solution de la forme hyperbolique a la forme trigonometrique en relation avec les caracteristiques de l'ecoulement initial que sont le nombre de froude, la longueur du canal, la hauteur de l'eau et la pente de la ligne d'energie. Par ailleurs, l'analyse de la convergence selon l'approche proposee par ponce est elargie en vue de son application aux modeles de preissmann generalise dans le cas ou l'ecoulement porteur est non uniforme. L'examen separe des nouveaux parametres introduit montre l'influence des pertes de charge sur les caracteristiques de propagation. D'autre part, l'analyse des parametres de ponderation temporelle et spatiale revele la difficulte a determiner les valeurs optimums de ces dernieres. La mise au point d'une nouvelle approche fondee sur l'analogie avec un systeme oscillatoire simple est proposee au vu des resultats des essais numeriques. Cette methode, sans rien prouver, permet de mettre en evidence des parametres synthetiques afferents a l'anamorphose. Le modele theorique d'ecoulement est ensuite elargi au cas des lits a fonds mobile. Une discussion est faite des differentes tentatives connues pour la representation des phenomenes de transport solide par le charriage sur le fond et en suspension dans la masse fluide
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Mphahlele, Rennie Esther. "A decade of educational change grounded narratives of school principals /." Thesis, Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-02232009-085412.
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LIMANTON, GREVET ANNE. "Caracteristiques principales de l'embryogenese somatique chez l'asperge cultivee, asparagus officinalis l. , et son utilisation a la transformation genetique par agrobacterium tumefaciens." Paris, Institut national d'agronomie de Paris Grignon, 1999. http://www.theses.fr/1999INAP0036.
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L'embryogenese somatique a ete obtenue chez les 9 clones d'asperge (asparagus officinalis l. ) etudies apres induction en presence d'auxine. Elle se manifeste par l'emergence relativement rare de souches embryogenes. Deux types de souches ont ete mis en evidence : des souches anergiees et des souches 2,4-d dependantes. Ces souches embryogenes ont des caracteristiques de croissance, de potentiel embryogene et de capacite germinative variables selon le genotype et le mode d'induction. De nombreuses variations du niveau de ploidie, notamment la tetraploidisation, ont ete observees dans les souches embryogenes et les plantes regenerees. Les souches embryogenes anergiees produisent des plantes presentant une capacite embryogene tres augmentee : des embryons somatiques apparaissent sur leurs explants sans aucun traitement hormonal. Ce caractere se transmet en descendance comme une mutation monogenique dominante pour les deux souches etudiees et semble correle a une augmentation des teneurs en conjugues d'auxine dans les meristemes cultives in vitro, alors que dans les plantes entieres, aucune modification des teneurs en hormones n'est observee. Les deux types de souches embryogenes produisent des embryons tres pauvres en reserves, dont la conversion en plantules necessite une phase de maturation qui permet alors d'obtenir jusqu'a 40% de germinations normales. De nombreux transformants independants exprimant le gene gus et le gene nptii ont ete obtenus a partir de 4 souches embryogenes issues de genotypes differents apres coculture avec agrobacterium tumefaciens. La plupart des transformants analyses ont integre 1 a 4 copies de l'adn-t. La transmission en descendance a ete etudiee chez 4 transformants independants pendant 2 generations. Il semble que les copies multiples de l'adn-t soient inserees au meme locus chez 2 transformants. Une partie des segregations est anormale. Un gene de chitinase d'insecte a egalement ete introduit dans deux souches embryogenes.
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Azevedo, Bárbara Brzezinski. "Agrupamento de trabalhadores com perfis semelhantes de aprendizado utilizando técnicas multivariadas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/96638.
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A manufatura de produtos customizados resulta em variedade de modelos, redução no tamanho de lotes e alternância frequente de tarefas executadas por trabalhadores. Neste contexto, tarefas manuais são especialmente afetadas por conta do processo de adaptação do trabalhador a novos modelos de produtos. Este processo de aprendizado pode ocorrer de maneira distinta dentro de um grupo de trabalhadores. Assim, busca-se o agrupamento dos trabalhadores com perfis similares de aprendizado, monitorando a formação de gargalos em linhas de produção constituídas por dissimilaridades de aprendizado em processos manuais. A presente dissertação apresenta abordagens para clusterização de trabalhadores baseadas nos parâmetros oriundos da modelagem de Curvas de Aprendizado. Tais parâmetros, os quais caracterizam o processo de adaptação de trabalhadores a tarefas, são transformados através da Análise de Componentes Principais e então utilizados como variáveis de clusterização. Na sequência, testam-se outras transformações nos parâmetros utilizando funções Kernel. Os trabalhadores são clusterizados através do método K-Means e Fuzzy C-Means e a qualidade dos agrupamentos formados é medida através do Silhouette Index. Por fim, sugere-se um índice de importância de variável baseado em parâmetros obtidos na Análise Componentes Principais com o objetivo de selecionar as variáveis mais relevantes para clusterização. As abordagens propostas são aplicadas em um processo da indústria calçadista, gerando resultados satisfatórios quando comparados a clusterizações realizadas sem a transformação prévia dos dados ou sem seleção das variáveis.Manufacturing of customized products relies on a large menu choice, reduced batch sizes and frequent alternation of tasks performed by workers. In this context, manual tasks are especially affected by workers’ adaptation to new product models. This learning process takes place in different paces within a group of workers. This thesis aims at grouping workers with similar learning process tailored to avoid bottlenecks in production lines due to learning dissimilarities among workers. For that matter, we present a method for clustering workers based on parameters derived from Learning Curve (LC) modeling. Such parameters are processed through Principal Component Analysis (PCA), and the PCA scores are used as clustering variables. Next, Kernel transformations are also used to improve clustering quality. The data is clustered using K-Means and Fuzzy C-Means techniques, and the quality of resulting clusters is measured by the Silhouette Index. Finally, we suggest a variable importance index based on parameters derived from PCA to select the most relevant variables for clustering. The proposed approaches are applied in a footwear process, yielding satisfactory results when compared to clustering on original data or without variable selection.
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Carter, Duane B. "Analysis of Multiresolution Data fusion Techniques." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36609.
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In recent years, as the availability of remote sensing imagery of varying resolution has increased, merging images of differing spatial resolution has become a significant operation in the field of digital remote sensing. This practice, known as data fusion, is designed to enhance the spatial resolution of multispectral images by merging a relatively coarse-resolution image with a higher resolution panchromatic image of the same geographic area. This study examines properties of fused images and their ability to preserve the spectral integrity of the original image. It analyzes five current data fusion techniques for three complex scenes to assess their performance. The five data fusion models used include one spatial domain model (High-Pass Filter), two algebraic models (Multiplicative and Brovey Transform), and two spectral domain models (Principal Components Transform and Intensity-Hue-Saturation). SPOT data were chosen for both the panchromatic and multispectral data sets. These data sets were chosen for the high spatial resolution of the panchromatic (10 meters) data, the relatively high spectral resolution of the multispectral data, and the low spatial resolution ratio of two to one (2:1). After the application of the data fusion techniques, each merged image was analyzed statistically, graphically, and for increased photointerpretive potential as compared with the original multispectral images. While all of the data fusion models distorted the original multispectral imagery to an extent, both the Intensity-Hue-Saturation Model and the High-Pass Filter model maintained the original qualities of the multispectral imagery to an acceptable level. The High-Pass Filter model, designed to highlight the high frequency spatial information, provided the most noticeable increase in spatial resolution.Master of Science
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Zenker, Steffen [Verfasser]. "Design Principles of Mobile Information Systems in the Digital Transformation of the Workplace - Utilization of Smartwatch-based Information Systems in the Corporate Context / Steffen Zenker." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2021. http://d-nb.info/1225936527/34.
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Galloway, Greta Marie Mandy. "A conceptual analysis of visionary leadership and its implications for educational transformation in schools." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/49813.
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Thesis (MPhil)--University of Stellenbosch, 2004.ENGLISH ABSTRACT: There are many new developments in education taking place specifically in the field of schooling. Some of these developments - school based management, OBE curriculum developments and the devolution of control to the school level have brought with it many significant policy changes. Many educational leaders are struggling to keep abreast with these transformational changes that are confronting them with regard to leadership and management of education, and educational structures within the school. Therefore, visionary leadership is an essential ingredient in understanding the democratic changes and restructuring taking place at present. Many principals at schools are struggling with the changes, while possibly not fully understanding the political, social and economic dynamics of these changes. This assignment seeks to establish the need for visionary leadership in order to meet the challenges and constraints educational leaders face in their attempts to effect transformation in South Africa. I strongly identify with the democratic principles used to overcome the challenges and constraints to redress education in South African schools. Interviews were conducted and data was constructed with principals of six different schools in the East London area. The educational leaders interviewed, ranged from primary to high school principals giving a vast expanse of expertise as leaders within a specific school community. This assignment is based on the assumption that there is scope for educational leaders to bring about greater change and transformation in schools. There are many ways to visualise an effective school landscape based on a combination of personal, organisational and professional strategies. This assignment can be considered a contribution in this regard. KEY WORDS: Educational leaders, transformation and visionary leadership
AFRIKAANSE OPSOMMING: Daar is baie nuwe verwikkelinge wat plaasvind in die onderwys veralop die gebied van skole. Baie van hierdie verwikkelinge, onder andere, skoolgebaseerde bestuur, kurrikulumontwikkeling en die oordrag van gesag op skoolvlak het baie nuwe, aanpasbare opvoedkundige beleide en veranderings verwesenlik. Baie opvoedkundige leiers worstelom aan te pas by hierdie veranderinge. Hierdie veranderinge vereis dat leiers en bestuurders in die onderwysomgewing en strukture binne skoolverband om meer responsief op te tree. Visionêre leierskap is 'n belangrike vereiste om die demokratiese veranderinge en herstrukturering van skole te bevorder. Baie skoolhoofde worstel met hierdie veranderinge, omdat hulle nie heeltemal besef wat van die politieke, sosiale en ekonomiese uitdagings wat verandering bied, verwag word nie. Hierdie taak poog om die noodsaaklikheid vir visionêre leierskap en die vereistes en beperkinge wat onderwysleiers konfronteer in hulle benadering om transformasie in Suid-Afrikaanse skole te bewerkstellig, te ondersoek. Onderhoude was onderneem en data was gekonstrueer met skoolhoofde van ses verskillende skole in die Oos-London-omgewing. Die onderhoude met die onderwysleiers het plaasgevind by primêre- sowel as hoërskole. 'n Omvattende uitbreiding van wysheid en vaardigheid as leiers binne 'n spesifike skool omgewing was geopenbaar. Hierdie taak is gebaseer op die aaname dat daar ruimte is vir onderwysleiers om beter transformasie in skole aan te bring. Daar is baie maniere om visuele, effektiewe skole se terrein, gebaseer op 'n kombinasie van persoonlike, organisitoriese en professionele strategieë, te verwesenlik. Hierdie taak kan beskou word as 'n definitiewe bydrae in hierdie verband. KERNBEGRIPPE: Onderwysleiers, transformasie en visionêre leierskap.
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Muhammad, Razeq Zarlasht. "The Business of Policy Innovation: The Transformation of the United Nations Development Programme’s Engagement with the Private Sector (1997-2008)." Thesis, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/24009.
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Recently, intergovernmental organizations (IGOs) have adopted policies that engage the private sector in the implementation of their development mandates. Despite the implications of these changes, the subject is among the least conceptualized. By applying a theory-guided process-tracing (TGPT) methodology, this paper examines the process of change at the United Nations Development Programme (UNDP). It advances a constructivist argument and evaluates whether this change could be viewed as a norm-driven change, where norms of corporate social responsibility (CSR), in the process of interaction and learning, have obtained an intersubjective quality and redefined the role of the private sector in the context of organization’s objectives. The paper evaluates this argument in light of the alternative assumptions of the principal-agent model, the bureaucratic culture literature, and rational choice institutionalism. It highlights the implications of this research in empirical, analytical, and theoretical terms for further studies and concludes that, without a due assessment of the intervening effect of norms on policies, the causal claims of other theories are seriously challenged.
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Jia, Xiuping Electrical Engineering Australian Defence Force Academy UNSW. "Classification techniques for hyperspectral remote sensing image data." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Electrical Engineering, 1996. http://handle.unsw.edu.au/1959.4/38713.
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Hyperspectral remote sensing image data, such as that recorded by AVIRIS with 224 spectral bands, provides rich information on ground cover types. However, it presents new problems in machine assisted interpretation, mainly in long processing times and the difficulties of class training due to the low ratio of number of training samples to the number of bands. This thesis investigates feasible and efficient feature reduction and image classification techniques which are appropriate for hyperspectral image data. The study is reported in three parts. The first concerns a deterministic approach for hyperspectral data interpretation. Multigroup and multiple threshold spectral coding procedures, and associated techniques for spectral matching and classification, are proposed and tested. By coding on subgroups of bands using one or three thresholds, spectral searching and matching becomes simple, fast and free of the need for radiometric correction. Modifications of existing statistical techniques are proposed in the second part of the investigation A block-based maximum likelihood classification technique is developed. Several subgroups are formed from the complete set of spectral bands in the data, based on the properties of global correlation among the bands. Subgroups which are poorly correlated with each other are treated independently using conventional maximum likelihood classification. Experimental results demonstrate that, when using appropriate subgroup sizes, the new method provides a compromise among classification accuracy, processing time and available training pixels. Furthermore, a segmented, and possibly multi-layer, principal components transformation is proposed as a possible feature reduction technique prior to classification, and for effective colour display. The transformation is performed efficiently on each of the highly correlated subgroups of bands independently. Selected features from each transformed subgroup can be then transformed again to achieve a satisfactory data reduction ratio and to generate the three most significant components for colour display. Classification accuracy is improved and high quality colour image display is achieved in experiments using two AVIRIS data sets.
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Frichot, Benoît. "Optimalité asymptotique et à distance finie de tests d'ajustement." Montpellier 2, 2000. http://www.theses.fr/2000MON20044.
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Ce travail presente une etude de tests d'ajustement de modeles de distribution a des donnees du point de vue de leur optimalite face a differentes situations. Dans la premiere partie, nous etudions le cas ou le modele teste est entierement specifie. En etudiant la litterature, nous voyons que beaucoup de statistiques de test ont une distribution asymptotique qui est celle d'une somme ponderee de khi-deux, centres sous h o et decentres sous h 1. Ces parametres de decentralite et la ponderation de la statistique ont une influence determinante sur la puissance du test ; en particulier, ils determinent la courbure locale de la puissance. Ceci nous permet de developper deux nouveaux tests optimaux. Le premier consiste a ponderer la statistique de facon a obtenir, face a une certaine alternative, une courbure locale maximale de la fonction puissance. Le deuxieme propose un nouveau critere de troncature de la statistique des tests lisses de neyman. Ce critere est optimal au sens ou il retient les k premieres composantes de la statistique qui rendent la courbure locale maximale. Dans la deuxieme partie, nous nous interessons au cas ou le modele a tester contient des parametres inconnus, en particulier les parametres de tendance centrale et d'echelle. Nous proposons alors une approximation de la statistique du test uniformement le plus puissant invariant. Elle nous permet de developper un test invariant quasi optimal accessible a bon nombre de distributions. De plus, l'etude de la distribution asymptotique de la statistique de ce test nous fait aborder le test du rapport des vraisemblances maximales sous un angle nouveau d'optimalite. Cette meme approximation nous permet enfin de developper les regions critiques qui sont asymptotiquement
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Nazilli, Vuslat. "Wavelet-based monitoring and analysis of cardiorespiratory response to hypoxia." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001283.
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Reguna, Lakshmi. "An indepth analysis of face recognition algorithms using affine approximations." [Tampa, Fla.] : University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000616.
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Chaudhari, Soumee. "Modelling Distance Functions Induced by Face Recognition Algorithms." Scholar Commons, 2004. https://scholarcommons.usf.edu/etd/990.
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Face recognition algorithms has in the past few years become a very active area of research in the fields of computer vision, image processing, and cognitive psychology. This has spawned various algorithms of different complexities. The concept of principal component analysis(PCA) is a popular mode of face recognition algorithm and has often been used to benchmark other face recognition algorithms for identification and verification scenarios. However in this thesis, we try to analyze different face recognition algorithms at a deeper level. The objective is to model the distances output by any face recognition algorithm as a function of the input images. We achieve this by creating an affine eigen space from the PCA space such that it can approximate the results of the face recognition algorithm under consideration as closely as possible.
Holistic template matching algorithms like the Linear Discriminant Analysis algorithm( LDA), the Bayesian Intrapersonal/Extrapersonal classifier(BIC), as well as local feature based algorithms like the Elastic Bunch Graph Matching algorithm(EBGM) and a commercial face recognition algorithm are selected for our experiments. We experiment on two different data sets, the FERET data set and the Notre Dame data set. The FERET data set consists of images of subjects with variation in both time and expression. The Notre Dame data set consists of images of subjects with variation in time. We train our affine approximation algorithm on 25 subjects and test with 300 subjects from the FERET data set and 415 subjects from the Notre Dame data set. We also analyze the effect of different distance metrics used by the face recognition algorithm on the accuracy of the approximation. We study the quality of the approximation in the context of recognition for the identification and verification scenarios, characterized by cumulative match score curves (CMC) and receiver operator curves (ROC), respectively.
Our studies indicate that both the holistic template matching algorithms as well as feature based algorithms can be well approximated. We also find the affine approximation training can be generalized across covariates. For the data with time variation, we find that the rank order of approximation performance is BIC, LDA, EBGM, and commercial. For the data with expression variation, the rank order is LDA, BIC, commercial, and EBGM. Experiments to approximate PCA with distance measures other than Euclidean also performed very well. PCA+Euclidean distance is best approximated followed by PCA+MahL1, PCA+MahCosine, and PCA+Covariance.
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Parain, Dominique. "Analyse des potentiels évoqués somesthésiques à l'aide de la double transformation de Karhunen-Loeve." Rouen, 1990. http://www.theses.fr/1990ROUES045.
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Nous présentons un nouveau traitement des composantes de fréquences rapides des potentiels évoqués somesthésiques (P. E. S. ). Cette méthode comprend plusieurs parties : 1) un filtrage par ajustement polynomial ; 2) un traitement du signal (analyse en séries de Fourier) ; 3) une reconnaissance de forme (double transformation de Karhunen-Loeve). La nouvelle méthode de filtrage polynomial par segment sans changement de phase est décrite. L'intérêt du coefficient polynomial de courbure des principales composantes du P. E. S. Est étudié. La transformation de Karhunen-Loeve entraîne une importante réduction des données. La méthode d'analyse compare une série de trois P. E. S. à trois fonctions créneaux (un mobile et deux fixes). Ce traitement est un essai de quantification des latences interpics des P. E. S.
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Bartel, Kenneth Cyril, and res cand@acu edu au. "Leadership in a Lutheran School: an Exploration of principal and school pastor worldviews and their potential impact on the transformation of the school learning community." Australian Catholic University. School of Educational Leadership, 2004. http://dlibrary.acu.edu.au/digitaltheses/public/adt-acuvp43.29082005.
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This ethnomethodological study focuses on the worldviews of Lutheran school principals and pastors. Essentially, these leaders in a Lutheran school provide direction and vision for the school learning community. The degree to which their worldviews coalesce will naturally result in positive or negative influences on the whole school community. These leaders within the Lutheran school can be seen as a hub for all kinds of learning experiences and interaction in the context of vital Christian communities in mission outreach and quality education. Any dissonance of worldview has potential for impact on school processes and relationships. The Lutheran Church has defined the role of the pastor in the school and the difference from his role in a congregation (Lutheran Church of Australia, 2002). Lutheran principals have a delegated authority from their school councils to be responsible for the complete oversight of the school’s direction, the observance of policies, and the assignment of tasks and duties of staff. The blurring of responsibility occurs over the pastor’s rightful responsibility in regards to a word and sacrament ministry. In a Lutheran school where the Gospel is to inform all learning, such tension can cloud school dynamics and transformation. The Lutheran church policy, Relative responsibilities of pastor and principal within the Lutheran school, identifies three critical areas of required mutual respect for the Principal and School Pastor: theological, professional and personal (Lutheran Church of Australia, 2001, p. 3). Thus, the ‘worldview’ dimensions considered in this research centre around the theological, the educational and the interpersonal domains. The school transformation themes of lifelong learning, postmodernism and curriculum, school organization and change, and school community relationships are used to challenge worldview dimensions of Principals and School Pastors through a series of online ‘stories’, or scenarios, backed by personal interviews and a document study. The identification of school leadership tension points brings about recommendations for action.
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Bartel, Ken. "Leadership in a Lutheran school: An exploration of principal and school pastor worldviews and their potential impact on the transformation of the school learning community." Thesis, Australian Catholic University, 2014. https://acuresearchbank.acu.edu.au/download/d89c37986508e63052a9e6f408a3ccb0f9d7ec5caa2dbb5b579371a8ad76bd79/157190/64790_Bartel_2005_Leadership_in_a_Lutheran_School_1_.pdf.
Full textAbstract:
This ethnomethodological study focuses on the worldviews of Lutheran school principals and pastors. Essentially, these leaders in a Lutheran school provide direction and vision for the school learning community. The degree to which their worldviews coalesce will naturally result in positive or negative influences on the whole school community. These leaders within the Lutheran school can be seen as a hub for all kinds of learning experiences and interaction in the context of vital Christian communities in mission outreach and quality education. Any dissonance of worldview has potential for impact on school processes and relationships. The Lutheran Church has defined the role of the pastor in the school and the difference from his role in a congregation (Lutheran Church of Australia, 2002). Lutheran principals have a delegated authority from their school councils to be responsible for the complete oversight of the school's direction, the observance of policies, and the assignment of tasks and duties of staff. The blurring of responsibility occurs over the pastor's rightful responsibility in regards to a word and sacrament ministry. In a Lutheran school where the Gospel is to inform all learning, such tension can cloud school dynamics and transformation. The Lutheran church policy, Relative responsibilities of pastor and principal within the Lutheran school, identifies three critical areas of required mutual respect for the Principal and School Pastor: theological, professional and personal (Lutheran Church of Australia, 2001, p. 3). Thus, the 'worldview' dimensions considered in this research centre around the theological, the educational and the interpersonal domains.;The school transformation themes of lifelong learning, postmodernism and curriculum, school organization and change, and school community relationships are used to challenge worldview dimensions of Principals and School Pastors through a series of online 'stories', or scenarios, backed by personal interviews and a document study. The identification of school leadership tension points brings about recommendations for action.
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Meyer, Kai-Christian Verfasser], Karsten [Akademischer Betreuer] Albe, Doru [Akademischer Betreuer] Lupascu, Wolfgang [Akademischer Betreuer] Donner, and Michael [Akademischer Betreuer] [Vogel. "Phase Transformation Kinetics and Oxygen Transport in the Relaxor Ferroelectric Na1/2Bi1/2TiO3 studied by First-Principles Calculations / Kai-Christian Meyer ; Karsten Albe, Doru Lupascu, Wolfgang Donner, Michael Vogel." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://d-nb.info/1139492683/34.
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Moisan, Yves. "Restauration de la réflectivité et détection des changements dans une série d’images C-ERS-1 de type RGH à l'aide de la transformation par composantes principales." Thèse, Université de Sherbrooke, 1996. http://hdl.handle.net/11143/11444.
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La présente thèse porte sur la détection des changements temporels sur une série de cinq images ERS-1 détectées en amplitude à l'aide de la technique d'analyse en composantes principales (ACP). L'objectif du travail est d'évaluer deux méthodologies d'utilisation de l'ACP qui ont été proposées ces dernières années pour traiter des données Landsat. Plus particulièrement, nous désirons évaluer le pouvoir de concentration des changements temporels qu'offrent ces méthodologies. Avant d'être soumises à l'ACP, les variables de départ ont été étalonnées, puis superposées et filtrées. Une superposition d'image à image avec rééchantillonnage par convolution cubique a été effectuée à l'aide de points d'appui identifiés par un algorithme de recherche de réflecteurs durs. La stratégie de filtrage que nous avons retenue est celle de l'estimation de la réflectivité par maximum a posteriori (MAP) gamma-gamma. Cette méthode tient compte des statistiques de la scène et du chatoiement et permet un fort lissage dans les zones homogènes tout en préservant les contours. Notre implémentation du MAP requiert une image de contours binaire. Les images de contours ont été obtenues par l'intersection logique d'images de contours résultant de l'application du Laplacien du Gaussien (LdG), d'une part, et du détecteur basé sur le rapport des moyennes (RdM), d'autre part. Nous présentons également une avenue de recherche qui propose l'intersection logique entre les maxima locaux de la fonction image, définis sur des voisinages de 3 X 3, et le RdM. Cette méthode a montré un bon potentiel de détection des contours. Une fois les images restaurées par la méthode du MAP, nous les avons soumises à l'ACP sous deux formes : 1) images restaurées sans traitement additionnel et 2) images de changements. Nos résultats montrent que l'ACP ne permet pas d'isoler les changements dans une composante dans le premier cas. Par • contre, l'utilisation d'images de changements en guise d'intrant à l'ACP permet d'obtenir de nouvelles variables qui concentrent les changements temporels. Trois stypes d'images de changements ont été évalués : 1) rapport d'amplitude, 2) rapport d'intensité et 3) différences de d. Nos essais ont porté sur ce dernier type d'images uniquement. Les deux autres ont été éliminés d'emblée puisqu'ils ne satisfaisaient pas au critère de normalité statistique nécessaire à une bonne interprétation des composantes principales. L'interprétation des composantes principales a été réalisée par une analyse visuelle des images et par l'étude des matrices de corrélation. Nos résultats indiquent que la première composante concentre au moins 90 % des changements temporels. Une analyse quantitative montre que les valeurs extrêmes de la première composante correspondent aux zones de plus forts changements temporels. Nos résultats montrent également que la première composante est associée aux changements temporels significatifs. Les changements qui sont redevables à des artéfacts, comme les problèmes de superposition des images, sont concentrés dans les dernières composantes. Finalement, nous abordons la question de l'utilité de l'ACP dans l'optique plus générale de l'analyse de données radar, plus particulièrement en ce qui a trait à la classification d'images.