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  • 1
    Book
    Book
    3D image analysis and synthesis 97 : proceedings ; November 17-18, 1997 Erlangen, Germany (1997)
    Sankt Augustin :Infix,
    Details
    Title: 3D image analysis and synthesis 97 : proceedings ; November 17-18, 1997 Erlangen, Germany
    Contributer: Seidel, H.-P. , Girod, B. , Niemann, H.
    Publisher: Sankt Augustin :Infix,
    Year of publication: 1997
    Pages: 225 S.
    Type of Medium: Book
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  • 2
    Electronic Resource
    Electronic Resource
    AN INTRODUCTION TO K. WIEGHARDT'S HISTORICAL PAPER “ON SPLITTING AND CRACKING OF ELASTIC BODIES” (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 18 (1995), S. 0 
    Details
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.1995.tb00863.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A diode-laser pump source with small focus diameter for end- pumped systems (1999)
    Springer
    Optical and quantum electronics 31 (1999), S. 173-181 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract A pump source with eight angular multiplexed laser diodes is built. The diode laser emission is collimated and focused using relatively inexpensive aspherical lenses. The maximum output power is 6.3W at 970nm. The overall transmittance of the beam shaping optics is T=85%. The electrical, temporal and spectral properties are studied. The variances of the spatial intensity distribution are Δr0x=99m and Δr0y=85m. The beam propagation factors are M2x=38 and M2y=112. The high intensity in the focus makes this system ideal for end pumping of solid state lasers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006909123066
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  • 4
    Electronic Resource
    Electronic Resource
    Endothelial cells are the major source of sICAM-1 in rheumatoid synovial tissue (1997)
    Springer
    Rheumatology international 17 (1997), S. 17-27 
    Details
    ISSN: 1437-160X
    Keywords: Key words Rheumatoid arthritis ; sICAM-1 ; Endothelial cells ; Synovial tissue
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The objective of this research was to investigate the cellular source of soluble ICAM-1 (siCAM-1) from rheumatoid synovial tissue (RS) and its relation to sICAM-1 in synovial fluid (SF) and serum, and to study the expression of ICAM-1 in isolated cells of RS. sICAM-1 was determined by using the enzyme-linked immunosorbent assay (ELISA) and Western blot analysis in supernatants from RS cultured for short periods (n = 19), in SF (n = 7) and in serum (n = 19). ICAM-1 expression, vascularization and inflammatory infiltration (CD3, CD68, CD22) were characterized immunohistochemically in cytospin preparations (n = 18), cryosections (n = 18) and in conventionally stained paraffin sections (n = 19) of RS. The degree of RS vascularization was analysed morphometrically in immunohistochemically stained cryosections (factor VIII related antigen). We found 90-kD sICAM-1 in supernatants of cultured cells, in SF and in sera. sICAM-1 in cellular supernatant correlated significantly (P 〈 0.01) with SF sICAM-1. The amount of sICAM in cellular supernatants showed no correlation to the score of inflammatory infiltration, but correlated significantly (P 〈 0.001) with the vascularization index of RS. The percentage of ICAM-1-expressing cells correlated significantly (P 〈 0.001) with the percentage of CD68-positive macrophages, but not with CD3- and CD22-positive lymphocytes. Macrophages, multinucleated giant cells and endothelial cells exhibited a higher expression of ICAM-1 as compared to lymphocytes and fibroblasts. The differential expression of ICAM-1 on infiltrating leucocytes and resident cells of RS indicates a functional role of ICAM-1 in the local inflammatory process. SF sICAM-1 originated in RS, but serum sICAM-1 did not. Shedding of sICAM-1 by RS was independent of inflammatory infiltration, but depended on the degree of vascularization, indicating that endothelial cells are the major source of sICAM-1 in RS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00006846
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  • 5
    Electronic Resource
    Electronic Resource
    Biadrenales Phäochromozytom bei einem Jungen (1999)
    Springer
    Monatsschrift Kinderheilkunde 147 (1999), S. 477-479 
    Details
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Phäochromozytom ; Kindesalter ; Nebenniere ; Phakomatose ; Key words Pheochromocytoma ; Childhood ; Adrenal gland ; Phacomatosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary We report on a 8 year old boy in whom ophthalmological signs (scotoma, fundus hypertonicus stage IV) and an elevated blood pressure lead to the diagnosis of an isolated pheochromocytoma of the left adrenal. 6 months before, a cerebral convolsion was interpreted as a benign convulsion caused by infection. The boy was cured by adrenalectomy. However, 3 years after the initial diagnosis, he showed again typical clinical signs of a pheochromocytoma which was finally confirmed by laboratory tests and computertomography. The right adrenal was removed. Family history was negative. By molecular analysis, an association with von Hippel-Lindau disease was found. Discussion: Our case emphasizes the necessity to exclude a phacomatosis in all cases of pheochromocytoma.
    Notes: Zusammenfassung Wir berichten über einen 8 Jahre alten Jungen, bei dem 6 Monate nach einem unklaren zerebralen Krampfanfall aufgrund der augenärztlichen Symptomatik (Skotom, Fundus hypertonicus Grad IV) ein arterieller Hochdruck diagnostiziert wurde. Die weiteren Untersuchungen ergaben ein isoliertes Phäochromozytom der linken Nebenniere. Der Tumor wurde durch eine Adrenalektomie entfernt, und der Junge war im weiteren Verlauf beschwerdefrei. 3 Jahre später wurde er mit der gleichen klinischen Symptomatik wie bei der Erstdiagnose stationär aufgenommen. Jetzt wurde ein Phäochromozytom in der rechten Nebenniere diagnostiziert. Der Tumor wurde erneut mittels Adrenalektomie entfernt. Andere Tumoren konnten bislang bei dem Jungen nicht gefunden werden. Die Familienanamnese für Phäochromozytome war negativ. Die molekulargenetische Diagnostik ergab eine Mutation im Von-Hippel-Lindau-Gen. Diskussion: Auch bei einem isolierten biadrenalen Phäochromozytom muß eine Phakomatose molekulargenetisch ausgeschlossen werden. In unserem Fall wurde die Diagnose eines Von-Hippel-Lindau-Syndroms gestellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001120050449
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Chili—Protective factor against peptic ulcer? (1995)
    Springer
    Digestive diseases and sciences 40 (1995), S. 576-579 
    Details
    ISSN: 1573-2568
    Keywords: peptic ulcer ; chili ; capsaicin ; diet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of the present study was to determine the frequency and amount of chili taken by peptic ulcer patients and control subjects. One hundred three Chinese patients with peptic ulcer and 87 control patients were interviewed using a standard questionnaire. Those subjects who deliberately avoided chili use because of symptoms or advice from friends or medical practitioners were excluded. The median number of times of chili use per month was eight in the ulcer group (25–75% quartiles 1–30) compared to 24 (8–56) in the control group (P〈0.001). The median amount of chili used per month was 312 units (25–75% quartiles 38–899) in the ulcer group compared to 834 units (274–1892) in the control group (P〈0.001). The odds ratio of having peptic ulcer disease, adjusted for age, sex, analgesic use, and smoking by multiple logistic regression, was 0.47 (95% confidence intervals: 0.25–0.89) for subjects who had a higher intake of chili both in terms of frequency as well as amount used compared to those who took less chili. Our data support the hypothesis that chili use has a protective effect against peptic ulcer disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02064373
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    The Electrolysis and Electrolytic Conductivity of Certain Substances dissolved in LiquidAmmonia (1897)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 1 (1897), S. 707-713 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150593a001
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  • 8
    Electronic Resource
    Electronic Resource
    Observation of wave-induced chaotic radial transport in a laboratory terrella experiment (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 2143-2148 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The wave-induced chaotic radial transport of energetic electrons has been observed in a laboratory terrella, the Collisionless Terrella Experiment (CTX) [H. P. Warren and M. E. Mauel, Phys. Plasmas 2, 4185 (1995)]. In the experiment electron-cyclotron-resonance heating (ECRH) is used to create a localized population of trapped energetic electrons which excite drift-resonant electrostatic fluctuations. Measurements with multiple high-impedance floating potential probes are used to determine the amplitude, frequency, and mode structure of the observed fluctuations. Energetic electron transport is observed with gridded particle detectors. Poincaré surfaces of section indicate that increases in the flux of energetic electrons to the detectors occur only when fluctuations which meet the conditions for global chaos are present. Quasilinear transport simulations do not reproduce several important features of the experimental measurements. In contrast, Hamiltonian simulations reproduce many of the salient temporal characteristics of the experimental measurements and indicate that the persistence of phase-space correlations plays an important role in the energetic electron transport observed in the experiment. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871667
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  • 9
    Electronic Resource
    Electronic Resource
    Nonlinear theory of helix traveling wave tubes in the frequency domain (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 3633-3646 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A nonlinear helix traveling wave tube (TWT) analysis in the frequency domain is presented for a sheath helix surrounded by a conducting wall. Dielectric- and vane-loading of the helix are included as is circuit tapering and external focusing by either a solenoid or a field produced by a periodic permanent magnet (PPM) stack. The electromagnetic field is treated as a superposition of waves where the amplitudes and phases vary slowly in z. The field equations are solved in conjunction with the three-dimensional Lorentz force equations for an ensemble of electrons. Beam space-charge waves are included using a superposition of solutions of the Helmholtz equation. The dc (direct current) self-fields of the beam are also included. The simulation is compared with linear theory as well as a time-domain simulation, each of which is applied to an example of a tube built at Northrop-Grumman Corp. The frequency- and time-domain simulations are in substantial agreement. The advantage of the frequency-domain formulation is a shorter run time than for the time-domain simulation. Hence, the frequency-domain simulation can more easily treat beam thermal effects and multiple waves with closely spaced frequencies. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873622
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  • 10
    Electronic Resource
    Electronic Resource
    Theory of helix traveling wave tubes with dielectric and vane loading (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 3145-3161 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A time-dependent nonlinear analysis of a helix traveling wave tube (TWT) is presented for a configuration where an electron beam propagates through a sheath helix surrounded by a conducting wall. The effects of dielectric and vane loading are included in the formulation as is efficiency enhancement by tapering the helix pitch. Dielectric loading is described under the assumption that the gap between the helix and the wall is uniformly filled by a dielectric material. The vane-loading model describes the insertion of an arbitrary number of vanes running the length of the helix, and the polarization of the field between the vanes is assumed to be an azimuthally symmetric transverse-electric mode. The field is represented as a superposition of azimuthally symmetric waves in a vacuum sheath helix. An overall explicit sinusoidal variation of the form exp(ikz−iωt) is assumed (where ω denotes the angular frequency corresponding to the wave number k in the vacuum sheath helix), and the polarization and radial variation of each wave is determined by the boundary conditions in a vacuum sheath helix. The propagation of each wave in vacuo as well as the interaction of each wave with the electron beam is included by allowing the amplitudes of the waves to vary in z and t. A dynamical equation for the field amplitudes is derived analogously to Poynting's equation, and solved in conjunction with the three-dimensional Lorentz force equations for an ensemble of electrons. Electron beams with a both a continuous and emission-gated pulse format are analyzed, and the model is compared with linear theory of the interaction as well as with the performance of a TWTs operated at the Naval Research Laboratory and at Northrop–Grumman Corporation. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871590
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