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  • 1
    Electronic Resource
    Electronic Resource
    Central and peripheral coordination in movement sequences (1993)
    Springer
    Psychological research 55 (1993), S. 124-130 
    Details
    ISSN: 1430-2772
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Notes: Summary Motor coordination has been too poorly defined to be a useful construct in studying the control of movement. In general, motor coordination involves controlling both the timing and the kinematics of movement. Yet the motor behaviors typically used for the study of coordination have required controlling only the timing or the spatial aspects of a movement. To understand better the basis of motor behavior, this study examined movement sequences, a class of movement in which both the timing and the kinematics must be controlled. In one experiment we studied a reaching and grasping movement sequence to characterize the central coordination of movement sequences. In another experiment we studied a throwing movement sequence to characterize the peripheral (kinesthetic) coordination of movement sequences. An heuristic model is presented to explain how central and peripheral mechanisms of coordination might interact to produce accurate movement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00419643
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  • 2
    Electronic Resource
    Electronic Resource
    Nucleotide sequence of cDNA encoding the group II allergen of cocksfoot/orchard grass (Dactylis glomerata), Dac g II (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 48 (1993), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Cocksfoot/orchard grass (Dactylis glomerata) anther cDNA clones encoding the group II allergen Dac g II were previously isolated on the basis of immunoreactivity of human, rabbit, and murine antibodies with a 24–kDa protein expressed as a fusion protein with β-galactosidase. Nucleotide sequencing reveals an open reading frame predicting expression of a 98–amino-acid (11–kDa) polypeptide exhibiting 〉 90% homology with the group II allergen of Lolium perenne, Lol p II. In vitro translation of different sized clone fragments generated by polymerase chain amplification confirms eukaryotic expression of a 10–12–kDa polypeptide by SDS-PAGE and the position of a translational stop apparently unrecognized during expression of λgt 11 in E. coli. The unusual characteristics of the prokaryote-expressed fusion proteins may be exerting conformational alterations in Dac g II, as reflected by previous demonstrations of differences in human IgE immunoreactivity. Northern blot analysis using PCR-generated partial and full-length probes suggests that group II allergens may be encoded by a different family or families of temporally expressed genes from those encoding group I major allergens, although a group I gene may have been the progenitor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1993.tb00758.x
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  • 3
    Electronic Resource
    Electronic Resource
    A COLOPOSCOPIC STUDY OF THE CERVIX DURING PREGNANCY AND THE PUERPERIUM (1966)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 73 (1966), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1966.tb15536.x
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  • 4
    Electronic Resource
    Electronic Resource
    The influence of the elastic modulus on computed craze surface stress distributions (1997)
    Springer
    Journal of materials science 32 (1997), S. 2707-2714 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The surface stresses along the contour of a crack-tip craze in a glassy thermoplastic can be computed from measured craze displacements by applying finite element methods. It is shown that calculated crack-tip craze surface stress distributions are highly dependent on the accuracy of the evaluation of the elastic modulus of the bulk polymer. Methods of estimating the modulus are considered. A method based on fitting the Dugdale model to the measured craze profile gives rate- and time-dependent moduli which are consistent with measured moduli at strain levels comparable with those in the compact tension specimen near the interface with the craze. The major part of the sample is at a much lower strain level and a new method, based on interference optical measurements and finite element computations of crack displacements, is developed to estimate the appropriate modulus. Craze surface stresses are computed for two cases in which the estimated modulus for the two parts of the sample significantly differ. In a creep test, the modulus near the craze is lower than that in the remainder of the specimen and it is seen that any stress concentration at the crack tip is suppressed. This explains why the crack remains stationary while the craze continues to grow. In the case of crack propagation, the modulus in the region around the craze has the higher value and the stress at the crack tip increases. The crack therefore continues to propagate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018687409120
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  • 5
    Electronic Resource
    Electronic Resource
    The influence of pre-compression on the measured fracture toughness of polymethylmethacrylate (1985)
    Springer
    Polymer bulletin 13 (1985), S. 417-420 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Compact tension specimens are subjected to applied compression prior to fracture toughness testing. The measured fracture toughness, KQ, is approximately constant at low prestrains but it decreases with further increase in strain due to the presence of residual tensile stresses at the notch tip. KQ is found to be time-dependent due to relaxation of notchtip residual stresses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01033337
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  • 6
    Electronic Resource
    Electronic Resource
    Computation of craze surface stresses in high impact polystyrene (1983)
    Springer
    Polymer bulletin 10 (1983), S. 187-190 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The finite element method is used to compute surface stresses for a craze in high impact polystyrene (HIPS) and the results are compared with those obtained using a distributed dislocation stress analysis. There is very good agreement between the stress profiles for the major portion of the craze length. The estimates differ in the craze tip region where calculated stresses are very sensitive to small changes in the displacement profile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275855
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  • 7
    Electronic Resource
    Electronic Resource
    Stress analysis of crazes at moving crack tips (1986)
    Springer
    Polymer bulletin 16 (1986), S. 545-550 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The finite element method is applied to contours of craze zones in front of moving crack tips in polymethylmethacrylate (PMMA), measured by interferometry, in order to compute the stress distribution. In contrast to the constant stress assumed in the Dugdale model, a stress distribution is found with a maximum at the crack tip then a sharp decrease and a more gradual decline over the larger part of the craze length. Computed stresses as well as the Dugdale stress increase with increasing crack speed and, hence, decreasing loading time. Generally the results obtained are in good agreement with those already found for growing crazes at stationary crack tips.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255225
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  • 8
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    The Commander and His Officers (1929)
    London : Periodicals Archive Online (PAO)
    The RUSI journal. 74 (1929:Feb./Nov.) 721 
    Details
    ISSN: 0307-1847
    Topics: Political Science
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:p225-1929-074-00-000004
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  • 9
    Electronic Resource
    Electronic Resource
    Autoradiographische Untersuchungen an normalem und atypischem Plattenepithel der menschlichen Cervix und Vagina (1964)
    Springer
    Archives of gynecology and obstetrics 200 (1964), S. 172-179 
    Details
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Um die Natur von Plattenepithelveränderungen an der Cervix uteri über die Morphologie hinaus besser charakterisieren zu können, wurde die Autoradiographie herangezogen. Unter bestimmten Bedingungen kann der Einbau von radioaktiv markiertem Thymidin als ein Maß für die Wachstumsrate angesehen werden. Der Isotopen-Einbau erfolgte in Gewebekulturen aus Explantaten von normalem und regenerierendem Plattenepithel sowie in explantierten Biopsien von kolposkopisch suspekten Arealen. Bereits im normalen Plattenepithel war die Streuung der prozentual markierten Zellen sehr hoch. Gleiches galt von atypischem Plattenepithel, obwohl dort ein gewisser Anstieg der Proliferation zu verzeichnen war. Eine Abhängigkeit zwischen dem Schweregrad der histologisch erfaßbaren Veränderung und der autoradiographisch erkennbaren Proliferation konnte nicht gefunden werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00673197
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Determinants of Bone Mineral Density in Older Men (2000)
    Springer
    Osteoporosis international 11 (2000), S. 815-821 
    Details
    ISSN: 1433-2965
    Keywords: Key words:Bone density – Male – Osteoporosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract: Although osteoporosis in men is increasingly recognized as an important health issue and bone mass appears to be a major determinant of fracture, there remain few data concerning the determinants of bone mass in men. To determine the correlates of bone density in men, we studied a large group of older subjects recruited from three rural communities in the northwestern United States. Three hundred and fifty-five men over the age of 60 years (mean 71.5 ± 7.4 years) without known disorders of mineral metabolism were recruited by community advertising. Bone mineral density was measured at the lumbar spine, proximal femur and radius by dual-energy X-ray absorptiometry, and factors potentially related to skeletal status were assessed by direct measurements or questionnaire. In univariate analyses weight (positively) and age (negatively) were associated with bone density. After adjustment for these two factors, alcohol intake, osteoarthritis and thiazide use were associated with higher bone density, while previous fractures, gastrectomy, peptic ulcer disease, rheumatoid arthritis, glucocorticoid use, hypertension, previous hyperthyroidism, height loss since age 20 years, chronic lung disease and smoking were related to lower density. In multivariate models, only weight and a history of cancer were related to higher bone mass, and age, previous fracture, rheumatoid arthritis, gastrectomy and hypertension were associated with lower density. These data contribute to the emerging field of osteoporosis in men, and may help in the clinical identification of men at higher risk of osteopenia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001980070039
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