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  • 1
    Electronic Resource
    Electronic Resource
    NMR determination of the signs of all the coupling constants in CH"nF"3"-"nSO"2F
    Amsterdam : Elsevier
    Journal of Magnetic Resonance (1969) 40 (1980), S. 483-488 
    Details
    ISSN: 0022-2364
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-2364(80)90006-2
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  • 2
    Electronic Resource
    Electronic Resource
    Changes in serum haptoglobin level after allergen challenge test in asthmatic children (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 53 (1998), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Bronchial asthma is characterized by airway inflammation, which underlies the phenomenon of bronchial hyperresponsiveness. Previous studies have shown that this correlates with the serum concentration of haptoglobin. The occurrence of the late asthmatic response (LAR) after an allergen challenge test is associated with airway inflammation. The objectives of this study were to examine serum levels of haptoglobin during the 24 h after allergen challenge and to compare changes between the subjects with and without LAR. We studied two groups of children with perennial asthma who developed the early asthmatic response (EAR) only (group 1: n = 14), and EAR but also LAR (group II: n = 14) after an allergen (Dermatophagoides pteronyssinus) challenge test. Serum concentrations of haptoglobin were measured at baseline, at EAR, and at 2 h (recovery), 8 h (LAR), and 24 h after the challenge. Baseline levels were similar in the two groups (group I: 128±57 mg/dl: group II: 129±50 mg/dl). In group I, there was no significant change in the level at any time point; in contrast, the subjects in group II showed a relative fall (92±40 mg/dl) at 8 h, and an increase (161±79 mg/dl) at 24 h after the challenge. Our results indicate that the serum concentration of haptoglobin decreases at the time of LAR and is subsequently replenished during the ensuing time. Although further studies are needed, we think that haptoglobin may be inflused into the airways during the inflammatory process associated with LAR, and that this may be followed by “overshooting” production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1998.tb03868.x
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  • 3
    Electronic Resource
    Electronic Resource
    Knowledge acquisition using a neural network for a weather forecasting knowledge-based system (1993)
    Springer
    Neural computing & applications 1 (1993), S. 215-223 
    Details
    ISSN: 1433-3058
    Keywords: Expert system ; Knowledge-based system ; Neural networks ; Machine learning ; Induction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract Neural network technology is experiencing rapid growth and is receiving considerable attention from almost every field of science and engineering. The attraction is due to the successful application of neural network techniques to several real world problems. Neural networks have not yet found widespread application in weather forecasting. The reason for this has been the difficulty in obtaining suitable weather forecasting data sets. In this paper we describe our experience in applying neural network techniques for acquiring the necessary knowledge to predict the weather conditions of Melbourne City and its suburbs in Australia during a 24 hour period beginning at 9 am local time. The accuracy of forecasts produced by a given forecasting procedure typically varies with factors such as geographical location, season, categories of weather, quality of input data, lead time and validity time. Two types of weather data sets assembled from the archives of the Australian Commonwealth Bureau of Meteorology are used for training the neural network. The results of the experiments are competitive and are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01414951
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  • 4
    Electronic Resource
    Electronic Resource
    Torque Optimizing Control with Singularity-Robustness for Kinematically Redundant Robots (2000)
    Springer
    Journal of intelligent and robotic systems 28 (2000), S. 231-258 
    Details
    ISSN: 1573-0409
    Keywords: kinematically redundant manipulators ; torque-optimality ; singularity-robustness ; dynamic control equation ; weighted generalized inverses ; Jacobian-inertia product ; damped least-squares inverses ; generalized dynamic manipulability measure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new control method for kinematically redundant manipulators having the properties of torque-optimality and singularity-robustness is developed. A dynamic control equation, an equation of joint torques that should be satisfied to get the desired dynamic behavior of the end-effector, is formulated using the feedback linearization theory. The optimal control law is determined by locally optimizing an appropriate norm of joint torques using the weighted generalized inverses of the manipulator Jacobian-inertia product. In addition, the optimal control law is augmented with fictitious joint damping forces to stabilize the uncontrolled dynamics acting in the null-space of the Jacobian-inertia product. This paper also presents a new method for the robust handling of robot kinematic singularities in the context of joint torque optimization. Control of the end-effector motions in the neighborhood of a singular configuration is based on the use of the damped least-squares inverse of the Jacobian-inertia product. A damping factor as a function of the generalized dynamic manipulability measure is introduced to reduce the end-effector acceleration error caused by the damping. The proposed control method is applied to the numerical model of SNU-ERC 3-DOF planar direct-drive manipulator.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008152705719
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  • 5
    Electronic Resource
    Electronic Resource
    A modified Wagner technique for femoral lengthening in skeletally mature patients with poliomyelitis (1993)
    Springer
    International orthopaedics 17 (1993), S. 154-157 
    Details
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Une variante de la méthode de Wagner d'allongement du fémur utilisant l'Orthofix, a été appliquée à 62 adultes d'âge moyen de 26 ans et demi, présentant des séquelles de poliomyélite. La première étape est presque identique à la méthode de Wagner originale, toutefois l'allongement a été réalisé à partir du 5 – 7 éme jour, au rythme de 1.5 mm par jour. Pour la deuxième étape, une plaque vissée a été mise en place et un greffon cortico-spongieux iliaque a été inséré entre les deux fragments, de préférence en compression. Cette méthode ne nécessite pas d'immobilisation plâtrée et permet la mobilisation précoce du genou ainsi que la reprise précoce de l'appui sous couvert d'une orthèse. L'allongement moyen obtenu a été de 4.2 cms; il y a eu 34% de complications secondaires, avec un recul de 3 ans et 2 mois en moyenne.
    Notes: Summary A modified Wagner technique using an Orthofix was employed for femoral lengthening in 62 skeletally mature patients with residual poliomyelitis. The first stage was similar to that of the original Wagner technique. However, distraction was started after 5 to 7 days at a rate of 1.5 mm per day. At the second stage, a neutralization plate was applied and a corticocancellous iliac strut graft inserted in the distracted site, preferably under compression. Cast immobilisation was not used and a long leg brace with a thigh corset allowed early knee movement and weightbearing. The average age at operation was 26 years and 6 months. The period of follow-up averaged 3 years and 2 months, and the average amount of lengthening was 4.2 cm. The overall rate of complication was 34%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00186376
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  • 6
    Electronic Resource
    Electronic Resource
    Novel method of ultrafine titania particle sol preparation (1997)
    Springer
    Journal of materials science 16 (1997), S. 1284-1285 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Abstracts are not published in this journal
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018579009274
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  • 7
    Electronic Resource
    Electronic Resource
    High sensitivity of positron annihilation lifetime to time and pressure effects in gas-exposed polymers (1996)
    Springer
    Journal of radioanalytical and nuclear chemistry 210 (1996), S. 513-524 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Positron annihilation lifetime (PAL) experiments are performed in polycarbonate (PC) exposed to CO2 and He gases as a function of time and pressure. In PC/CO2 systems, hole size and fraction reduced from PAL data increase as a function of CO2 pressure and exposure time. Significant hysteresis in positron lifetime data is observed during CO2 abasorption/desorption. In PC/He systems, no variation is observed. Hole size distribution in the CO2-exposed polymers is found to be significantly broader than in unexposed samples. The high sensitivity of PAL results to CO2 exposure of PC is thought to relate to the microstructural changes in the polymer matrix, such as penetrant plasticization, gas hydrostatic pressure effect, and molecular filling and creation of holes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02056391
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