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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Clinical and experimental dermatology 27 (2002), S. 0 
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary Cutaneous sarcoidosis is rare in children. We report a case of a 5-year-old Bangladeshi girl who presented with fever, a papular eruption on the lower limbs and trunk, malaise, anorexia and weight loss. There was multisystem involvement with marked hepatosplenomegaly, generalized lymphadenopathy, parotid fullness and chronic uveitis. Pulmonary infiltrates were seen on the chest X-ray. Histology of a skin biopsy showed naked noncaseating granulomata and PCR for Mycobacterium tuberculosis was negative. A clinical diagnosis of sarcoidosis was made. The patient was treated with oral prednisolone (2 mg/kg per day). An excellent clinical response with resolution of the rash and improvement of extracutaneous signs was noted within 3 months and she remains well on low-dose prednisolone on alternate days. We discuss the presentation and management of sarcoidosis in children, and highlight the potential difficulty in differentiating this from disseminated tuberculosis.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Berlin, Germany : Blackwell Verlag GmbH
    Anatomia, histologia, embryologia 34 (2005), S. 0 
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Today's students belong to an interactive generation and receive information through multiple channels. Curricula in veterinary medicine are changing due to trends such as ‘student centred education’ and ‘competence based learning’. Taking in account these changes, we were encouraged to rethink the way in which we teach and assess the knowledge of veterinary anatomy. The amount of dissection (90 h) and lecture hours (90 h) has not changed, but the way they are used and how the ‘knowledge’ is assessed has been revised. First, goals were defined: students have to acquire knowledge and insight in the structure, function and relationships of anatomical structures of various species. They have to be able to observe, palpate and expose the structures properly. Additionally, they must attain general skills, e.g. communication. Secondly a new learning environment was developed so students could accomplish these goals. The three main components, constituting this new environment were: the introduction of an assessment and development centre (ADC) as a means of assessing students as well as giving them feedback, the incorporation of e-learning and the raise of student-lecturer interactions during lecture hours. During the ADC the students have to go through three set-ups: they demonstrate structures, they name structures and they ‘solve’ a problem (e.g. cut tendon). They report their findings both verbally and written. Using checklists the student's practical skills are assessed during the dissections and during the ADC. Students receive feedback at four different times. An E-learning environment was devised, giving the students the possibility to consult photographs of the dissections, to discuss the course on a discussion board and to take self-assessment tests to monitor their progress. During the student-lecturer interactions, photographs, clinical examples, are discussed using various teaching methods, resulting in a more ‘active’ approach to the learning content. Students are enthusiastic about this way of teaching although they experience it as difficult. Student scores seem not different from previously. In the future the practical checklists and the ADC will be optimized.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 128 (1988), S. 251-260 
    ISSN: 1420-9136
    Keywords: Coda ; attenuation ; scattering
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Coda wave data from California microearthquakes were studied in order to delineate regional fluctuations of apparent crustal attenuation in the band 1.5 to 24 Hz. Apparent attenuation was estimated using a single back scattering model of coda waves. The coda wave data were restricted to ≤30 s following the origin time; this insures that crustal effects dominate the results as the backscattered shear waves thought to form the coda would not have had time to penetrate much deeper. Results indicate a strong variation in apparent crustal attenuation at high frequencies between the Franciscan and Salinian regions of central California and the Long Valley area of the Sierra Nevada. Although the codaQ measurements coincide at 1.5 Hz (Q c =100), at 24 Hz there is a factor of four difference between the measurements made in Franciscan (Q c =525) and Long Valley (Q c =2100) with the Salinian midway between (Q c =900). These are extremely large variations compared to measures of seismic velocities of comparable resolution, demonstrating the exceptional sensitivity of the high frequency codaQ measurement to regional geology. In addition, the frequency trend of the results is opposite to that seen in a compilation of codaQ measurements made worldwide by other authors which tend to converge at high and diverge at low frequencies, however, the worldwide results generally were obtained without limiting the coda lengths and probably reflect upper mantle rather than crustal properties. Our results match those expected due to scattering in random media represented by Von Karman autocorrelation functions of orders 1/2 to 1/3. The Von Karman medium of order 1/3 corresponding to the Franciscan codaQ measurement contains greater amounts of high wavenumber fluctuations. This indicates relatively large medium fluctuations with wavelengths on the order of 100 m in the highly deformed crust associated with the Franciscan, however, the influence of scattering on the codaQ measurement is currently a matter of controversy.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 475-479 (Jan. 2005), p. 1083-1086 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The Laboratory Soete developed a new test setup, based on the well-known pin-on-disc test rig. Instead of the standard composite specimen and steel disc, a rotating composite disc and a steel pin is presently used to have a visible wear track. Other measurement techniques (Acoustic Emission, vibrations, temperature) can be used on the test rig. Continuous monitoring of the wear track combined with standard wear and friction measurements, give results of the current state of the wear track. Fourier frequency analysis (FFT) of these signals gives an indication of the change in condition and contact geometry of the resulting pin-disc combination. A high-speed camera will be used to acquire digital images of the worn composite surface. These online measurements yield to the gradual evolution in damage of the composite specimens
    Type of Medium: Electronic Resource
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