Submanifolds satisfying the condition $K(X,\,Y)\cdot K=0$

Sakamoto, Kunio

doi:10.2996/kmj/1138846767

Cited by 10 publications

(14 citation statements)

References 11 publications

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“…The Pd -Rh -H system is unique, because the extent of the two phase (a + b ) co-existence region increases with increase of substituted metal, whereas it does not for other Pd alloy-hydrogen systems [3,13,141. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…This may be due to the fact that the attainment to phase equilibrium state is very sluggish, and that the lattice parameters of Pd and Rh are similar and the scale of the spinodal decomposition which occurs upon phase separation is too fine to detect the spatial composition variations [2]. The room temperature lattice parameters of Pd -Rh alloys decrease in an almost linear fashion with increasing Rh content [3] (Fig. 1 Hydrogen absorption and desorption isotherms for Pd -Rh alloys have been determined by several workers [4 -91.…”

Section: Introductionmentioning

confidence: 99%

“…Fig. 1 shows the lattice parameters at the a,, and Pmin phase boundary compositions as a function of Rh content in hydrogenated Pd -Rh alloys, together with the lattice parameters, ass of hydrogen-free alloys [3], where all the initial foil samples (about 60 -70 pm) used had been heated at 1 123 K for 2 h in vacuo and furnace-cooled to room temperature at a rate of 300-360Kh-', i.e., the samples were in a fully annealed state. Hydrogen was introduced electrolytically in a sulfuric acid solution at 298 +-1 K to obtain roughly about equal Xray diffraction intensities of the respective phases.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen absorption and thermodynamic properties of hydrogen in low rh content Pd‐Rh alloys

Sakamoto

Haraguchi

Ura

et al. 1994

Ber Bunsenges Phys Chem

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The hydrogen absorption characteristics of fully annealed Pd‐Rh alloys containing up to 10.0 at.% Rh have been investigated at temperatures between 273 K and 433 K and hydrogen pressures up to 1000 Torr by means of pressure‐composition isotherm measurements. For the p‐c isotherms of Pd‐7.5 at.% Rh alloy, in addition to the normal (α+β) two‐phase plateaus, “anomalous plateaus” are observed near the normal βmin phase boundaries. The formation of this anomalous plateau implies that in the fully annealed alloys some precursory phase separation exists, together with the metastable, homogeneous solid solution phase. The low pressure hydrogen solubilities decrease with an increase of Rh content and the main plateau pressures increase with the solute metal content. The hydrogen solubilities exhibit a maximum at about 7.5 at.% Rh at 1000 Torr. The derived relative partial molar thermodynamic quantities at infinite dilution, and also the plateau thermodynamic parameters are in agreement with the previously reported results. These thermodynamic quantities are not affected by the formation of the anomalous hydride phase, because the hydride does not form in the dilute phase region, and because the amount of hydrogen involved in the anomalous hydride phase is small compared to the main hydride phase.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrogen absorption and thermodynamic properties of hydrogen in low rh content Pd‐Rh alloys

Sakamoto

Haraguchi

Ura

et al. 1994

Ber Bunsenges Phys Chem

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“…A llot' the lens images were taken by the same exam iner (one o f the authors) and image analysis of those pictures was performed by an author whose data repro ducibility had already been examined [6]. Based on the reproducible data of the examiner, significant changes (differences between intrapupillary shadow area or light scattering intensity at the initial examination time and that at the final examination (A%) were evaluated as a decrease, no change or an increase by A% of < -5 % , 5 5% and > 5%, respectively.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Lens Transparency Changes through Photographed Images during a 13-Month Observation Period

et al. 1995

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Since the development of the anterior eye segment analysis system, several new types of anterior eye segment biometry have been performed. The main aim of this study was to evaluate whether changes in cataractous progression or an increase in lens transparency loss are detectable during a relatively short period of 13 months by measuring the intrapupillary opaque shadow area through retroillumination images or by calculating the light scattering intensity at the deepest cortical layer of the lens through Scheimpflug slit images. Secondly, the relationship between maximally dilated pupil sizes and patients’ ages and that between cases with and without diabetes were studied. Thirty-one eyes (49.2%) of sixty-three cataractous lenses showed more than 5% increase in the opaque shadow area. Forthy-five eyes (60.0%) showed more than a 5% increase in light scattering intensity. 92.5% of diabetic eyes and 92.3% of nondiabetic eyes showed pupil sizes over 6.5 mm after an instillation of mydriat-ica. In our study the applied method guaranteed a high reproducibility; thus is might be possible to detect an increase in cataractous changes and lens transparancy in around 50% of examined subjects in a period as short a 1 year. For the evaluation of cataract progression through a retroillumination image, the recommendable pupil size is ≧ 6.5 mm.

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“…A possible set of modes, which are compatible with a generic cavity design is TE22,6 (104 GHz), TE28.8 (140 GHz), and TE34,10 (174 GHz) [10,11], or TE17,6 (104.7 GHz) and TE22,8 (140 GHz) as built from GYCOM for AUG [6]. The development of a 2f gyrotron at JAEA is based on TE31,11 (170 GHz) and TE25.9 (137 GHz), both frequencies match the resonances of a single disk window with 1.853 mm thickness [12]. The chosen modes are both emitted from the mode converter at about the same inclination angle and can thus be coupled to the transmission waveguide by the same MOU.…”

Section: Sourcesmentioning

confidence: 99%

Large Scale CW ECRH Systems: Some considerations

Erckmann

Kasparek

Plaum

et al. 2012

EPJ Web of Conferences

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Abstract. Electron Cyclotron Resonance Heating (ECRH) is a key component in the heating arsenal for the next step fusion devices like W7-X and ITER. These devices are equipped with superconducting coils and are designed to operate steady state. ECRH must thus operate in CW-mode with a large flexibility to comply with various physics demands such as plasma start-up, heating and current drive, as well as configurationand MHD -control. The request for many different sophisticated applications results in a growing complexity, which is in conflict with the request for high availability, reliability, and maintainability. 'Advanced' ECRH-systems must, therefore, comply with both the complex physics demands and operational robustness and reliability. The W7-X ECRH system is the first CW-facility of an ITER relevant size and is used as a test bed for advanced components. Proposals for future developments are presented together with improvements of gyrotrons, transmission components and launchers.

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Submanifolds satisfying the condition $K(X,\,Y)\cdot K=0$

Cited by 10 publications

References 11 publications

Hydrogen absorption and thermodynamic properties of hydrogen in low rh content Pd‐Rh alloys

Hydrogen absorption and thermodynamic properties of hydrogen in low rh content Pd‐Rh alloys

Evaluation of Lens Transparency Changes through Photographed Images during a 13-Month Observation Period

Large Scale CW ECRH Systems: Some considerations

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