Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Direct contact heat transfer to a drop translating in a transverse electric field (1986)
    Springer
    Heat and mass transfer 20 (1986), S. 11-18 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Es wurden Experimente über den Wärmeübergang an einem einzelnen Tropfen durchgeführt, der sich in einer mit ihm nicht mischbaren Flüssigkeit senkrecht zu einem elektrischen Feld bewegt. Besondere Aufmerksamkeit wurde der durch das elektrische Feld induzierten Zirkulation im Inneren des Tropfens gewidmet. Es wurden drei verschiedene Kombinationen von Flüssigkeiten getestet, nämlich eine, bei der der Faktor aus der Dielektrizitätskonstanten und dem spezifischen elektrischen Widerstand zwischen Tropfen und Medium groß gegenüber 1 ist, und zwei, für die dieser Faktor klein gegen 1 ist. Im ersten Fall wurde eine merkliche Verbesserung des Wärmeübergangs beobachtet, die man auf die induzierte Zirkulation zurückführen kann. Jedoch kann die Verbesserung, die sich bei den zwei letztgenannten Bedingungen einstellte, nicht durch die dort verschwindend geringen Zirkulationsströmungen erklärt werden, wenn sie auch weniger stark ausgeprägt war.
    Notes: Abstract An experimental study has been performed on heat transfer to a single drop translating in an immiscible liquid on which a steady uniform electric field is imposed perpendicular to the drop path. Particular attention has been paid to the effect of field-induced circulations inside and outside the drop. Three different combinations of liquids were tested: one for which the drop-to-medium permittivity ratio ɛ* multiplied by the drop-tomedium resistivity ratio χ* is large compared to unity and two for which ɛ* χ* ≪ 1. In the former a remarkable enhancement of heat transfer was obtained which could be ascribed to the induced circulations. However, a less remarkable enhancement obtained in the latter two could not be explained by the circulations which are predicted to be vanishingly weak.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00999731
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    New methods for removing saccades in analysis of smooth pursuit eye movement (1988)
    Springer
    Biological cybernetics 60 (1988), S. 111-119 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract New computation methods for removing saccades in analysis of smooth pursuit eye movement characteristics were developed. They have removed saccades more completely than previous methods, and were very effective especially for noisy data recorded by the EOG method. The fully developed method was applicable to eye movement data in tracking of pseudo-random target movement as well as deterministic target movement. Furthermore, the methods were also useful for extracting the number and magnitudes of saccades more precisely.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00202898
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Coherent Si growth on GaAs substrates by vapor phase deposition (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 347-349 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Epitaxial Si layers with low dislocation density were grown on GaAs substrates by pyrolysis using disilane. The dislocation density evaluated from SECCO etching (HF:H2 SO4 :K2 Cr2 O7 =100 cc:50 cc:2g) was less than 104/cm2, which is lower by two orders of magnitude than that of the GaAs layer on Si substrates. We found that the electron mobility of Si layers on GaAs substrates could be raised by decreasing the growth rate and a high mobility value the same as that of a homoepitaxial layer was obtained, although the Si layers were contaminated by an arsenic impurity of 1018 cm−3 .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100965
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    New machining method for making precise and very smooth mirror surfaces made from Cu and Al alloys for synchrotron radiation optics : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2120-2123 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A combined machining method of diamond turning and numerically controlled elastic emission machining has been developed for finishing metal mirror surfaces made from Cu and Al alloys. A mirror surface can be polished without any stress by this method. Shape and roughness of the mirror surface examined in different machining methods are compared and discussed. A precisely shaped mirror with a roughness less than 2-nm Rmax was obtained. A copper mirror was installed in a VUV beamline of the Photon Factory. It is confirmed that the metal mirror finished by the present method has good optical characteristics for synchrotron radiation beamlines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140841
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Optical properties of quantum wells with ultrathin-layer superlattice barriers (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 59 (1986), S. 2503-2506 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Single quantum wells of GaAs with barriers of (AlAs)2(GaAs)2 ultrathin-layer superlattices have been fabricated and photoluminescence measurement was performed. The photoluminescence energy was found to change almost linearly against the well width and the photoluminescence linewidth to get smaller with decreasing well width, which is in marked contrast to the case of a usual alloy-barriered single quantum well. It is indicated that the effective energy gap of the ultrathin-layer superlattice barrier decreases with the decreasing well width in such a structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336996
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Optical properties of (AlAs)n(GaAs)n superlattices grown by metalorganic chemical vapor deposition (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 2691-2695 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Optical properties were investigated on the superlattices with a unit lattice period of (AlAs)n(GaAs)n (n=1–24) which were grown by atmospheric-pressure metalorganic chemical vapor deposition. Raman spectroscopy indicated that superlattice structure is realized for each n without collapsing into alloys. Photoluminescence measurement indicated that the ultrathin-layer superlattice (with n larger than 2) has a direct energy gap, which is in good agreement with a tight-binding calculation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335905
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    High electron mobility in the selectively doped heterostructures grown by normal pressure metalorganic chemical vapor deposition (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 334-337 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: GaAs/AlGaAs heterostructure selectively doped with Si was grown in a conventional normal pressure metalorganic chemical vapor deposition using trimethyl metals and arsine. Mobility of the two-dimensional electron gas as high as 8100, 148 000, and 401 000 cm2/V s was obtained at 300, 77, and 5 K, respectively, for a sample with an undoped Al0.3Ga0.7As spacer layer of 100 A(ring) and with a sheet electron density of about 5×1011 cm−2. The heterostructure with the spacer layer thinner than 100 A(ring) shows high mobility comparable to the best values obtained by molecular-beam epitaxy. The influence of growth parameters on the electron mobility in the heterostructure is described in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337648
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    A new connection rule of wave functions at a heterointerface and band discontinuity between GaAs and AlGaAs (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 59 (1986), S. 4087-4090 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new connection rule of wave functions at a heterointerface was developed. This connection rule satisfies the conservation of probability current and contains a nonparabolic effective mass of carriers as a natural consequence of the theory. The subband energies in a GaAs/AlGaAs quantum well calculated using our new connection rule are in excellent conformity with a wide range of experimental results with band discontinuity of 85% and an effective mass for hole of 0.34m0.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336716
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Efficacy of famotidine and omeprazole in healing symptoms of non-erosive gastro-oesophageal reflux disease: randomized-controlled study of gastro-oesophageal reflux disease (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 21 (2005), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : The epidemiology and pathophysiology of non-erosive gastro-oesophageal reflux disease differs from erosive gastro-oesophageal reflux disease. There is a possibility that non-erosive gastro-oesophageal reflux disease treatment requires a different regimen/approach but it is not yet acknowledged.Aim : To investigate the efficacy of famotidine and omeprazole in the treatment of gastro-oesophageal reflux disease, especially non-erosive gastro-oesophageal reflux disease.Patients and methods : A randomized, open-label trial was conducted. Fifty-four gastro-oesophageal reflux disease patients were assigned to treatment with famotidine at a dosage of 20 mg twice daily; or omeprazole, 20 mg once daily, for a period of 8 weeks. The Short Form-36 Health Survey and Gastrointestinal Symptom Rating Scale administered at baseline and after 8 weeks of treatment as well as a symptom questionnaire were conducted daily.Results : Short Form-36 revealed that gastro-oesophageal reflux disease has severe impact on health-related quality of life. Thirty-nine subjects (77%) were endoscopically diagnosed as non-erosive gastro-oesophageal reflux disease. The mean Gastrointestinal Symptom Rating Scale abdominal pain, and indigestion score of non-erosive gastro-oesophageal reflux disease significantly improved in famotidine-treated patients (P 〈 0.05), but not in the omeprazole. There was no significant change regarding improved heartburn symptoms of non-erosive gastro-oesophageal reflux disease between treatments in the daytime or night-time.Conclusion : Famotidine and omeprazole were both effective in improving symptoms of gastro-oesophageal reflux disease, particularly non-erosive gastro-oesophageal reflux disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2005.02467.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Prevalence of atopic dermatitis in Japanese elementary schoolchildren (2005)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 152 (2005), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background  Although there have been several reports on the prevalence of atopic dermatitis (AD) in Japanese schoolchildren based on questionnaires, there has been no nation-wide study of the frequency of this condition diagnosed by dermatologists in regular health check-ups of schoolchildren.Objectives  The objective of this work was to evaluate precisely the prevalence of AD in elementary schoolchildren in Japan based on regular health check-ups by dermatologists.Methods  In 2001/2, elementary schoolchildren: first graders (age 6–7 years) and sixth graders (age 11–12 years) were examined by dermatologists in eight prefectures of Japan (Hokkaido, Iwate, Tokyo, Gifu, Osaka, Hiroshima, Kochi and Fukuoka). In each prefecture, public elementary schools were randomly selected from urban and rural districts. We planned to examine about 700 schoolchildren in each of urban first, urban sixth, rural first and rural sixth grades from the eight areas, a total of 22 400 children (700 × 4 × 8). AD was diagnosed by the dermatologists based on the Japanese Dermatological Association criteria for the disease.Results  The point prevalence of AD was 11·2% overall (2664 of 23 719) ranging from 7·4% (Iwate) to 15·0% (Fukuoka) in the eight areas. Seventy-four per cent, 24%, 1·6% and 0·3% of those afflicted were in the mild, moderate, severe and very severe groups, respectively. Overall, the prevalence of first graders was slightly higher than that of sixth graders (11·8% vs. 10·5%, P 〈 0·01). There was no apparent difference in prevalence between urban and rural districts, or between boys and girls.Conclusions  The prevalence of AD in Japanese elementary schoolchildren was about 10%, three-quarters of those being mildly affected. This is the first nation-wide study made of Japanese elementary schoolchildren examined by dermatologists to evaluate the frequency of AD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2004.06271.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...