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  • 1
    Electronic Resource
    Electronic Resource
    On the role of olfaction in sexual and interspecies recognition in crickets (Acheta and Gryllus)
    Amsterdam : Elsevier
    Animal Behaviour 24 (1976), S. 1-6 
    Details
    ISSN: 0003-3472
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0003-3472(76)80091-7
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  • 2
    Electronic Resource
    Electronic Resource
    On the role of olfaction in sexual and interspecies recognition in crickets (Acheta and Gryllus)
    Amsterdam : Elsevier
    Animal Behaviour 24 (1976), S. 1-6 
    Details
    ISSN: 0003-3472
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0003-3472(76)80091-7
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effects and Functions in the Evolution of Signaling Systems (1974)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Ecology, Evolution, and Systematics 5 (1974), S. 385-417 
    Details
    ISSN: 0066-4162
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.es.05.110174.002125
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  • 4
    Electronic Resource
    Electronic Resource
    Thermocapillary flow excited by focused nanosecond laser pulses in contaminated thin liquid iron films (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 2037-2044 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new method is established to determine surface tension and mechanisms of evaporation of liquid metals in a wide range of high temperatures. It is based on a combination of high-speed transmission electron microscopy imaging of flow in nanosecond laser pulse molten films and computer simulation. The technique was applied to iron films with native oxides to investigate the effects of surface active impurities in a melt with transient temperatures and gradients up to 4000 K and 5×108 K/m, respectively. Such melts show a shear flow with direction changing once or twice during 1–2 μs after a 20 ns laser pulse, which cannot be simulated using table values for the temperature coefficient of the surface tension and the vapor pressure. Instead, evaporation is negligible, and the flow of the liquid is mainly driven by a fast changing gradient of the surface tension caused by a time-varying distribution of temperature and dissolved surface active oxygen atoms. Current site coverage models, giving the surface tension as function of temperature and impurity content for static liquids, successfully can be applied to liquids moving on the nanosecond/micrometer scale, too. However, the number of active surface sites can be vastly reduced by short-lived oxide covers, e.g., in iron with native oxides down to 3.5% of the total number of surface sites. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360180
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  • 5
    Electronic Resource
    Electronic Resource
    Erratum: "Thermocapillary flow excited by focused nanosecond laser pulses in contaminated thin liquid iron films'' [J. Appl. Phys. 78, 2037 (1995)] (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 7427-7427 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360788
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  • 6
    Electronic Resource
    Electronic Resource
    Space and time resolved temperature measurements in laser pulse-produced metal melts (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 2534-2537 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A fast broadband pyrometer with a spatial resolution of 2 μm and an accuracy of 10% in temperature is described plus a calibration method suitable for liquid metals. The time resolution of temperature measurements is limited by the electronics rise time (3.5 ns) to 14 ns (10%–90% rise time) of a temperature change because of the nonlinear relation between electronic signal and temperature. The pyrometer was applied to determine the temperature of melts produced by focused nanosecond laser pulses in gold and iron films. Measured heating rates (1010–1011 K/s) and peak temperatures (3000 K) are correctly reproduced by numerical simulations for gold, but theoretical peak temperatures in iron were 1000 K in excess. The low actual temperature in iron can be explained by native oxides, decomposing during the laser pulse and thus dissipating energy. This effect may cause considerable differences between computed and actual temperatures during laser processing of thin metal films with unstable impurities. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1148155
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  • 7
    Electronic Resource
    Electronic Resource
    Adhesion at a granular surface (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 1880-1885 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The adhesion of an ultrathin carbon nitride (CN) coating to the surface of a two-phase CoPt–SiO2 granular film heterogeneous at the 10 nm scale has been studied using nanoscratch techniques. The nanoscratch resistance was found to depend sensitively on the volume fraction of the two phases. Both nanoscratch experiments and complementary electron microscopy observations indicate that CN adheres much more strongly to the SiO2 matrix than to the CoPt granules resulting in enhanced tribological performance in SiO2-rich films. The relative weakness of the CN/CoPt interface is correlated to the absence of interfacial metal nitride formation. The adhesion of the CN coating to the granular surface, the intrinsic mechanical properties of the underlying granular film (nanoindentation hardness and modulus), and the vertical rms surface roughness of the granular layer are all fundamentally changed as the CoPt content reaches the percolation threshold. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1303764
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  • 8
    Electronic Resource
    Electronic Resource
    Interparticle interactions and time effects in very thin Fe–SiO2 granular films (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 7824-7827 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Time decay and remanence measurements have been made on a series of very thin Fe–SiO2 granular thin films of varying composition. The susceptibility and the magnetic viscosity decreases drastically when the film thickness is thin enough to reach a two-dimensional arrangement of the granules. The measured values of the magnetic viscosity are very low (2% loss per decade) in the thinnest films so that further investigations in granular magnetic systems with higher anisotropy promise greater advantages for recording media. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370592
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  • 9
    Electronic Resource
    Electronic Resource
    145. Verkehrsunfälle motorisierter Zweiradfahrer —Epidemiologie, Verletzungsmuster und -ursachen (1978)
    Springer
    Langenbeck's archives of surgery 347 (1978), S. 645-645 
    Details
    ISSN: 1435-2451
    Keywords: Motorcycle, accidents ; Motorcycle, injuries ; Motorisierte Zweiradfahrer ; Verkehrsunfälle ; Verletzungsmuster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wurden 97 Unfälle motorisierter Zweiräder mit 107 Beteiligten analysiert. Auffällig ist das jugendliche Durchschnittsalter der Motorrad- und Kleinkraftradlenker (23 Jahre), der kurzfristige Führerscheinbesitz (3 Jahre) und der sehr kurze Fahrzeugbesitz (1,2 Jahre), was eine mangelnde Fahr- und Verkehrserfahrung widerspiegelt. Verletzungsschwerpunkte liegen am Schädel, Thorax und den unteren Extremitäten. Die Verletzungsgefährdung durch den Primäranprall am Unfallgegner ist höher als durch den Sekundäraufprall (z. B. Straße), Verletzungen durch die eigene Maschine sind selten und weniger schwerwiegend.
    Notes: Summary Ninety-seven motorcycle accidents, involving 107 participants, were analyzed. Particularly striking is the youthful average age of drivers of motorcycles and light-powered cycles (23 years), the short-term possession of the driving licence (3 years), and the even shorter time since acquisition of the vehicle (1.2 years), facts which reflect a lack of driving as well as of traffic experience. Centers of gravity for injuries are the skull, thorax, and lower extremities. The risk of injury from the primary impact with the accident opponent is greater than that from the secondary point of impact (i.e., the road). Injuries due to one's one vehicle are rare and less severe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01579438
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  • 10
    Electronic Resource
    Electronic Resource
    Fractures of the odontoid process in small children: biomechanical analysis and report of three cases (1996)
    Springer
    European spine journal 5 (1996), S. 63-70 
    Details
    ISSN: 1432-0932
    Keywords: Odontoid fracture in children ; Synchondrosis ; Operative treatment ; Follow-up ; Biomechanics ; Child seat restraint
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Odontoid “fractures” in young children typically involve the cartilaginous plate (synchondrosis) that separates the odontoid process from the body of the axis; 58 cases have been described in the literature. We report two cases in which 2-year-old children were involved as backseat passengers in head-on motor vehicle accidents, both were restrained by four-point child's seat harnesses. A biomechanical investigation was carried out using simulation in a real car crash test with a child dummy. This revealed that head-on collisions with a speed absorption of at least 40 km/h are the typical mechanism of injury in children under the age of 3 years involved in motor vehicle accidents. Shearing force is all that is necessary to explain the dens fracture. Both children were immediately symptomatic, and the diagnosis was obvious on radiographs. Neither child had neurological deficit, which correlates well with the literature, where neurological injuries were found only in conjunction with head injuries. After closed reduction, both cases were initially trated conservatively with halo and plaster vest for 12 weeks. In one case, in which the anterior dislocation was less than the diameter of the odontoid shaft, eventless healing occurred. In our second case, despite an anatomic reduction, the odontoid fracture failed to unite. After a temporary posterior fixation of C1/C2 we reamed the synchondrosis from anterior and performed autogenous bone grafting. The posterior fixation wire was removed after 5 months. In contrast to the literature, we do not recommend a permanent posterior fusion of C1/C2. Our two young patients were both followed-up for more than 3 years. Clinical and radiological examination at final follow-up was normal with no signs of atypical growth of the odontoid. In cases of major dislocation with greater instability we recommend primary open reduction and osteosynthesis with appropriate implants. This was done in a third case: a $$1{\raise0.5ex\hbox{$\scriptstyle 1$}\kern-0.1em/\kern-0.15em\lower0.25ex\hbox{$\scriptstyle 2$}}$$ -year-old boy who fell down the stairs and sustained a head injury and an unstable lesion of the odontoid with subtotal paraplegia. The odontoid was fixed with two screws.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307830
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