691 research outputs found
Some Banach spaces added by a Cohen real
We study certain Banach spaces that are added in the extension by one Cohen
real. Specifically, we show that adding just one Cohen real to any model adds a
Banach space of density which does not embed into any such space in
the ground model such a Banach space can be chosen to be UG This has
consequences on the the isomorphic universality number for Banach spaces of
density , which is hence equal to in the standard Cohen
model and the same is true for UG spaces. Analogous universality results for
Banach spaces are true for other cardinals, by a different proof.Comment: The version to appear in Topology and Its Applications arXiv admin
note: substantial text overlap with arXiv:1308.364
Design and frequency analysis of continuous finite-time-convergent differentiator
In this paper, a continuous finite-time-convergent differentiator is
presented based on a strong Lyapunov function. The continuous differentiator
can reduce chattering phenomenon sufficiently than normal sliding mode
differentiator, and the outputs of signal tracking and derivative estimation
are all smooth. Frequency analysis is applied to compare the continuous
differentiator with sliding mode differentiator. The beauties of the continuous
finite-time-convergent differentiator include its simplicity, restraining
noises sufficiently, and avoiding the chattering phenomenon
TASK SPECIFIC EVALUATION METHODOLOGY FOR CLINICAL FULL FIELD DIGITAL MAMMOGRAPHY
Purpose: The purpose of this dissertation is to evaluate the image quality of clinical Full Field Digital Mammography (FFDM) systems. This is done by evaluating image acquisition performance of clinical FFDM in a comprehensive way that accounts for scatter, focal spot un-sharpness, detector blur and anti-scatter grid performance using an anthropomorphic phantom. Additionally we intend to provide a limited evaluation of the effects that image processing in clinical FFDM has in signal detectability.
Methodology: We explored different strategies and a variety of mathematical model observers in order to evaluate the performance of clinical FFDM systems under different conditions. To evaluate image acquisition performance, we tested a system-model-based Hotelling observer (SMHO) model on a bench-top system using a uniform anthropomorphic phantom for an signal known exactly background known exactly (SKE/BKE) task. We then applied this concept on two clinical FFDM systems to compare their performance. In a limited study to evaluate the effects of image processing in the detectability of FFDM, we implemented the channelized Hotelling observer (CHO) model on clinically realistic images of an anatomical phantom for an SKE/BKE task.
Results: Even though the two systems use different detection technologies, there was no significant difference between their image acquisition performances quantified by the Contrast-Detail (CD) curves. We applied the CHO model to investigate the image processing algorithms used in GE Senographe DS FFDM system. For the particular SKE/BKE task with rotationally symmetric signals, the image processing tends to contribute to a non-significant reduction of system detectability.
Conclusion: We provided a complete description of FFDM system performance including the image acquisition chain and post-acquisition image processing. We demonstrated the simplicity and effectiveness of both the MFHO and CHO methods in a clinical setting
My Journey: From the NSU College Classroom to the Dermatology Office Exam Room
I was introduced to the Physician Assistant profession as a high school sophomore during a pre-medical program. I always desired to be in the medical field as I enjoyed science, problem solving, and interacting with others. I decided to learn more about what a PA does and if I could see myself becoming one. I began shadowing my now supervising physician in 2004. At the time, he had a physician assistant working with him, so I had the opportunity to observe their interaction, learn dermatologic terminology and procedures, and strengthen my interpersonal communication skills. I knew I could see myself as an integral part of the patient’s care and was determined to become a physician assistant. Once accepted as a dual admission student, my undergraduate journey began. I had a rigorous schedule for three years which included required science courses and honors program seminars. I was on the executive board of pre-medical clubs and was a peer tutor at Academic Services. It was crucial to have an organized and strict schedule, which I feel helped prepare me well for the challenging and intense coursework in PA school. Being a PA student taught me to persevere and gave me confidence to apply my knowledge when diagnosing and treating patients. I have been practicing as a physician assistant for over six years and still learn new things each day; about medicine, those I take care of, and myself. It’s about working as a team to comfort patients, educate patients, and save lives
Rezension: Die deutsche Sprache in China. Geschichte, Gegenwart, Zukunftsperspektiven.
Im Nachklang zu seiner umfangreichen Abhandlung zur internationalen Stellung der deutschen Sprache von 1991 (vgl. Ammon 1991) bringt Ulrich Ammon im Abstand von einigen Jahren regionalspezifische Bände zum gleichen Thema heraus. Auf Die deutsche Sprache in Japan. Verwendung und Studium, München 1994, folgte Die deutsche Sprache in Korea. Geschichte und Gegenwart, München 2003 (hg. zus. m. Chong Si Ho), und 2007 die Beitragssammlung zu China. In diesen auf die drei ostasiatischen Länder bezogenen Bänden wird mit zunehmender Beteiligung anderer Autoren bzw. Herausgeber – im Band zu China meldet sich Ammon nur noch zusammen mit den beiden Mitherausgebern im Vorwort zu Wort – sehr detailreich die jeweilige Situation des Deutschen umrissen
Aux origines de la méthode française d’enseignement du judo (1936-1967): acculturation, enjeux sportifs internationaux et gaullisme
Judo has a special place in French society, due to its educational picture, accordance with the method created by Kano in the nineteenth century. But judo history also reflects an acculturation of dominant Japanese models, as evidenced particularly by the development of a French teaching method of judo. At the crossroads between cultural history of pedagogical thoughts and social history of people involved, this study questions the assertion of a French specificity in judo teaching between 1936 and 1967. We analysed written sources (manuals, journals, Federal archives) and interviews with pioneers. The creation of a French teaching method is in continuity with the ideas of the French judo pioneers who adapt the Japanese models to Western and national culture. Developed between 1964 and 1967, this national method is a pillar of the Teacher-Training reform, and a means to unify teaching. But this method is mainly a way to increase the sporting and technical level of French judokas whose international results decline in a context of development and sportification of judo. The French method contributes also to Gaullism, aimed at a strong and independent France, including through Federal Sport.El judo ocupa una posición singular en la sociedad francesa por la imagen educativa de la que se beneficia, en el linaje de la disciplina y del método creados por Kano. Sin embargo, la historia del judo traduce una aculturación de los modelos japoneses dominantes cuyo testimonio es señaladamente la elaboración de un método francés de la enseñanza del judo entre 1964 et 1967. En la encrucijada de una historia cultural de las ideas pedagógicas y de una historia social de los actores involucrados este estudio cuestiona la afirmación de una especificidad francesa en la enseñanza del judo entre 1936 y 1967 a partir de archivos escritos y entrevistas con pioneros. La creación de un método francés de enseñanza esta en continuidad con la concepción de los pioneros del judo francés, que adaptan los modelos japoneses a la cultura occidental y nacional. Este método nacional es un pilar de la reforma de la formación de los profesores y permite unificar la enseñanza. Pero constituye en realidad un medio para mejorar el nivel deportista y técnico de los yudocas franceses cuyos resultados internacionales bajan en un contexto de desarrollo y de ‘deportización’ del yudo. El método francés se inscribe pues perfectamente en el gaullismo, apuntando una Francia fuerte e independiente incluso a través del deporte federal.Le judo occupe une position singulière dans la société française grâce à l’image éducative dont elle bénéficie, dans la lignée de la discipline et de la méthode créées par Kano au XIXe siècle. Mais l’histoire du judo traduit aussi une acculturation des modèles japonais dominants, dont témoigne notamment l’élaboration d’une méthode française d’enseignement du judo. À la croisée d’une histoire culturelle des idées pédagogiques et d’une histoire sociale des acteurs impliqués, cette étude questionne l’affirmation d’une spécificité française dans l’enseignement du judo entre 1936 et 1967, à partir d’archives écrites (manuels, revues, archives fédérales) et d’entretiens avec des pionniers. La création d’une méthode française d’enseignement est en continuité avec les conceptions des pionniers du judo français qui adaptent les modèles japonais à la culture occidentale et nationale. Cette méthode, élaborée entre 1964 et 1967, est un pilier de la réforme de la formation des professeurs et permet d’unifier l’enseignement. Mais elle constitue surtout un moyen pour relever le niveau technique et sportif des judokas français, dont les résultats internationaux baissent dans un contexte d’essor et de sportivisation du judo. La méthode française s’inscrit ainsi parfaitement dans le gaullisme, visant une France forte et indépendante, y compris à travers le sport fédéral
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