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  • 1990-1994  (17)
  • 1985-1989  (17)
  • 1960-1964
  • 1991  (17)
  • 1988  (17)
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5942-5944 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The power loss of Mn-Zn ferrites and its dependency on the microstructural factors have been investigated. The power loss was found to be lowered due to the formation of a high-electrical-resistive boundary layers, which is accomplished by an addition of specific refractory oxides, which are concentrated on the grain boundary and form a boundary layer with CaO. The new material, having a low power loss at high frequency (∼1 MHz), has been developed with the HfO2 addition.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 4136-4141 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Ion vibration gives rise to a new pulsing dipole moment which affects the long-range interaction with the target molecule. This pulsing long-range interaction mechanism has been applied to the proton-transfer reaction NH+3(ν)+NH3→NH2+NH+4 in which the vibrational mode-specific depression of the reaction rate is observed. Significance of the vibrationally induced dipole moment of NH+3(ν) has been clarified in such a way that the origin of the depression is ascribed to the interaction of this pulsing dipole moment with the permanent dipole moment of NH3. The results of calculation agree qualitatively well with the experimental result [Chupka and Russell, J. Chem. Phys. 48, 1527 (1968)].
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 211-212 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Experimental verification is made of a new polarization splitter which utilizes artificial anisotropic dielectrics. The splitter is composed of layers of periodically laminated SiO2/TiO2 thin films. The SiO2 and TiO2 films are alternately deposited by rf sputtering and reactive dc sputtering, respectively. The thickness of each layer is 50 nm, while the total number of the layers amounts to 2000. The measured polarization split angles are 5.7° (λ=0.63 μm) and 5.1° (λ=1.3 μm), being roughly the same as those predicted.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3856-3858 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The compositional dependence of recording-power sensitivity and recording-noise characteristics of TbFeCo and TbDyFeCo films have been studied systematically. The sensitivity depends on the compositional ratio of rare earth (RE) and transition metal (TM) rather than on Co content. This is explained by the fact that the temperature at which the coercive force (Hc ) coincides with the bias magnetic field of 500 Oe, hereafter denoted as T', varies drastically by altering the RE-to-TM ratio. High recording noise is observed for compositions having Tcomp close to TC. When TC−Tcomp(approximately-greater-than)70 °C, optimal carrier-to-noise ratios are obtained. These results are explained qualitatively by the behavior of domain-wall motion in the vicinity of the magnetically reversed domain.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 6050-6052 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ultrathin Co-based amorphous ribbons with a thickness of 6–10 μm were fabricated by a single roller quenching method in vacuum. The compositions of the alloys were zero magnetostrictive: Fe4.7Co70.3Si15B10 and (Fe0.05Co0.95)71(Si0.5B0.5)29. The ribbons obtained had good smoothness and dimensional uniformity. The core loss of toroidal samples 15 mm in diameter was measured after annealing. The loss decreased with decreasing ribbon thickness. In the case of 6.4-μm-thick (Fe,Co)71(Si,B)29 amorphous ribbon, the values at 100 kHz and 1 MHz were 40 mW/cm3 and 1.8 W/cm3 for Bm=0.1 T, respectively. The former was 1/4 that of Mn-Zn ferrites or 1/2 that of 5-μm-thick Supermalloy tape wound core loss. The latter was (2)/(3) that of 5-μm Supermalloy tape wound core loss. In addition, the initial permeability beyond 100 kHz was also markedly improved by thickness reduction. The values of 6.4-μm-thick (Fe,Co)71(Si,B)29 ribbon measured at 1 and 10 MHz were about 7000 and 1000 for Hm=2 mOe, respectively.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 1424-1427 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ultrafine ZnFe2O4 particles less than 10 nm in diameter formed by the coprecipitation method were observed using transmission electron microscopy. The chemical composition of these particles was consistent with that of the stoichiometric bulk material. The apparent lattice structure could be observed. These observations revealed that particles 5 nm in diameter were fine, defect-free, and cubic single crystals having a spinel structure. The particle surface became more and more circular with decreasing particle size. Even a particle as small as 2 nm was seen to be homogeneous and possess a spinel structure. To determine the particle size it was necessary to disperse particles by covering their surfaces with a double-adsorbed surfactant film. The particle size distribution was seen to be approximately log normal.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 104 (1991), S. 0 
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: A computer algorithm for tidal analysis is developed, based on a Bayesian method proposed by Ishiguro et al. (1983). The basic assumption of the method is smoothness of the drift. This assumption is represented in the form of prior probability in the Bayesian model. Once the prior distribution is determined, the parameters used in the analysis model are obtained by maximizing the posterior distribution of the parameters. For the given data, ABIC (Akaike's Bayesian Information Criterion, Akaike 1980) is used to select the optimum values of the hyperparameters of the prior distribution and combination of parameters. The program, BAYTAP-G, can be adapted to tidal data which includes such irregularities as drift, occasional steps and disturbances caused by meteorological influences. The applicability of this program is examined using simulated data and real strain data.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 691-693 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 870-872 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 10 (1988), S. 121-135 
    ISSN: 1279-8517
    Keywords: Pancreas ; Lymphatic system ; Cancer ; Macroscopic anatomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Une étude détaillée du drainage lymphatique du pancréas a été effectuée afin de poser les bases théoriques d'un curage lymphatique idéal dans la chirurgie d'exérèse du cancer. Une dissection minutieuse des lymphatiques a permis d'obtenir le résultat suivant. Trois voies de drainage principales ont été identifiées: la voie supérieure appartient à la chaîne hépatique commune, les voies moyenne et inférieure rejoignent le groupe ganglionnaire mésentérique supérieur. Tous ces drainages se terminent dans un nœud lymphatique situé à droite de l'origine du tronc cœliaque et de l'artère mésentérique supérieure. Les lymphatiques provenant du col du pancréas convergent également vers le même nœud. Derrière celui-ci existe un autre lymphonœud où se terminent les lymphatiques provenant de la face postérieure de la tête. Ces 2 nœuds adhèrent intimement l'un à l'autre, séparés seulement par le plexus nerveux de la tête du pancréas. Dans ce travail, nous avons utilisé pour ces nœuds les termes de lymphonœud cœliaco-mésentérique droit superficiel et profond. Deux voies de drainage distinctes ont été identifiées au niveau de la moitié gauche du pancréas. L'une longe les vaisseaux spléniques et l'autre accompagne l'artère pancréatique inférieure. Par ces 2 voies différentes les lymphatiques de la moitié gauche du pancréas se terminent dans un nœud situé à gauche de l'origine du tronc cœliaque et de l'artère mésentérique supérieure. Nous l'avons appelé le lymphonœud cœliaco-mésentérique gauche. A partir de ces relais lymphatiques situés de part et d'autre de l'origine des deux artères, des vaisseaux efférents se dirigent vers les nœuds juxta-aortiques: du côté droit, les lymphatiques efférents rejoignent les nœuds inter-aortico-veineux situés au-dessus et en dessous de l'abouchement de la veine rénale gauche dans la veine cave inférieure; du côté gauche ils rejoignent les nœuds latéro-aortiques gauches situés au-dessus et en dessous de la veine rénale gauche; à partir de ces relais les voies efférentes rejoignent l'espace rétro-aortique où elles forment un courant lymphatique ascendant. Notre travail n'a pas permis de découvrir des vaisseaux lymphatiques communiquant avec le système rétro-aortique au-dessus du niveau des artères rénales.
    Notes: Summary A detailed study of the lymphatics around the pancreas was carried out in order to provide a theoretic basis for ideal lymph-node resection in radical cancer operations. The following results were obtained as a result of minute macroscopic dissection of the lymphatics. Three major pathways are identified on the anterior surface of the head of the pancreas. The upper pathway belongs to the common hepatic group. The middle and lower routes are associated with the superior mesenteric nodal group. All these pathways terminate in the node situated to the right of the origins of the celiac trunk and the superior mesenteric artery. The lymphatics arising from the neck of the pancreas also converge at the same node. Behind this node, there is a terminal node for the lymphatics which arise from the posterior surface of the head. Both nodes are firmly adherent, with only the nerve plexus of the head of the pancreas intervening. In this study, we have named these lymph-nodes Lnn celiacomesenterici dextri superficialis et profundi. Two distinct pathways are identified in the left half of the pancreas. One follows the splenic blood vessels and the other accompanies the inferior pancreatic artery. By way of these routes, lymphatics from the left half of the pancreas terminate in the node situated to the left of the origins of the celiac trunk and superior mesenteric artery. We have applied the term Ln celiacomesentericus sinister to this node. From these lymphatic terminalis on both sides of the origins of the two arteries, efferent vessels are sent to the abdominoaortic nodes: on the right side, efferents reach the inter-aorticovenous nodes lying in the upper and lower angles formed by the inferior vena cava and the left renal vein; and on the left side, they arrive at the left latero-aortic nodes lying above and below the left renal vein. The efferents of these nodes then extend to the retro-aortic space, where they compose an ascending lymphatic system. Our study revealed no lymphatic vessels communicating with the retro-aortic system at levels above the renal arteries.
    Type of Medium: Electronic Resource
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