Dielectric characteristics of several complex-oxide compounds have been investigated. The materials investigated are those with rutile- or rutile-like crystal structure, and the complex-oxides related to TiO2. Some candidates for microwave resonator materials are shown.
This paper introduces an innovative transportation concept called Flexible Mobility on Demand (FMOD), which provides personalized services to passengers. FMOD is a demand responsive system in which a list of travel options is provided in real-time to each passenger request. The system provides passengers with flexibility to choose from a menu that is optimized in an assortment optimization framework. For operators, there is flexibility in terms of vehicle allocation to different service types: taxi, shared-taxi and mini-bus. The allocation of the available fleet to these three services is carried out dynamically and based on demand and supply so that vehicles can change roles during the day. The FMOD system is built based on a choice model and consumer surplus is taken into account in order to improve the passenger satisfaction. Furthermore, profits of the operators are expected to increase since the system adapts to changing demand patterns. In this paper, we introduce the concept of FMOD and present preliminary simulation results that quantify the added value of this system.
The electronic modification of TiO(2) with highly dispersed NiO particles smaller than ca. 2 nm by the chemisorption-calcination-cycle technique has given rise to a high level of visible-light-activity exceeding that of iron oxide-surface modified TiO(2) simultaneously with the UV-light-activity being significantly increased.
Phase equilibrium relations in the system PbO-TiOz-ZrOz were studied by quenching in the range where the PbO content is 50 mole yo and more. Isotherms were examined at llOOo, 1200°, and 13OO0C and tie lines were determined between the liquid and solid solution in equilibrium. The incongruent melting point of PbZr03 was 157OOC and the equilibrium between liquid, PbO-type solid, and PbZrOa is peritectic. Pb(Zr,Ti)Ol solid solutions containing more than 14 mole yo PbZrOa decomposed to liquid, ZrOz, and Pb(Zr,Ti)Oa and the decomposition temperature rises from 1340° to 157OOC with increasing PbZrO, content. The system PbTi03-PbZr03 should not b e treated as a binary, but as a section of the ternary system.
The Curie point (T
C) of BaTiO3 was earlier reported to be 120° C and has been recently believed to be 130° C. Some experiments have been performed here to reconfirm the T
C. Firing conditions used for preparing BaTiO3 were examined first with the use of pure BaCO3 or Ba(NO3)2 and TiO2. The x-dependence of T
C in (BaO)1-
x
(TiO2)1+
x
solid solution was measured. Data were scattered and suffered from individual variations. According to probability considerations, T
C of BaTiO3 was evaluated from the intercept at x=0. On the other hand, composition dependence of T
C in some related solid solution systems, (Ba1-
y
Pb
y
)TiO3. (Ba1-
y
Sr
y
)TiO3 and (BaTiO3)1-
y
(KF)
y
, was examined and the T
C of BaTiO3 was estimated by extrapolation toward the limit y→0. In conclusion, the Curie point of BaTiO3 is determined as 123.0±0.6° C.
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