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κ-Al2O3-type GaFeO3 is a promising multiferroic material due to the coexistence of a large spontaneous magnetization and polarization near room temperature. In the current study, we present the magnetic properties of single crystalline GaFeO3 and compare it with that of ε-Fe2O3. Magnetic measurements revealed that spontaneous magnetization appears below 540 K in two steps, similar to that reported for ε−Fe2O3. Partial magnetic ordering takes place at 540 K (TN1), with Fe3+ ions in two distorted octahedral sites ordering antiparallel to one another. Upon further cooling at 200 K (TN2), the remaining Fe3+ ions in regular octahedra and tetrahedra order antiparallel to one another. Substitution of Ga for Fe in ε-Fe2O3 leads to a decrease in TN1 and TN2 from 850 to 540 K and from 480 to 200 K, respectively, caused by a dilution of magnetic Fe by nonmagnetic Ga and preferential site occupation of Ga.
Lithium ion batteries with high-rate performance have been demanded since electric and hybrid vehicles are released. It is known that high interfacial resistance between electrode and electrolyte prevents intercalation of lithium ions. We investigated high-rate capability of typical LiCoO2 cathode with various surface morphologies using epitaxial thin films prepared by pulsed laser deposition. As a result, high-rate performance in (104)LiCoO2 thin films was enhanced by an increase of (110)LiCoO2 facet density because diffusion coefficient of (110)LiCoO2 was larger than that of (104)LiCoO2. Therefore, a control of crystal plane at the surface is a key point for high-rate performance.
In this study, we examine whether a pathology clinic, conducted by pathologists, a novel medical tool that provides an explanation for the diagnosis of a cancer, can influence the mental state and adjustment of breast cancer patients.
We created a paper-based questionnaire and interviewed targeted breast cancer patients, who had undergone radical surgery, before and after they visited the clinic.
We found that there may be increased motivation for treatment, a greater sense of reassurance, and reduced anxiety (as indicated by the Hospital Anxiety and Depression Scale (HADS)) in the group that attended the clinic.
Significance of Results:
Our results suggest that visiting the pathology clinic may reduce anxiety over the short term. On the other hand, Mental Adjustment to Cancer (MAC) Anxious Preoccupation scores were significantly higher in this group as well, both before and after attendance, compared to the group that did not attend. The attending group may have reduced anxiety by such actions as collecting medical data on the cause of their anxiety and adopting healthier behaviors. Our findings suggest that appropriate emotional support and provision of medical information are very important in dealing with patient anxiety.
We study spin injection from an in-plane magnetized Fe thin layer into a GaAs/AlGaAs quantum well (QW) in low magnetic fields of ±0.37 T using oblique Hanle effect. An oblique low magnetic field induces the precession of electron spins in the GaAs QW, allowing us to detect the spin polarization of electrons injected across the Fe/AlGaAs interface. Our analysis of the circular polarization of light emitted in the electron-hole recombination process in the QW gives an estimate of the lower bounds of the spin polarization to be 4.0%. Also, a spin lifetime of 140 psec is obtained in this analysis, indicating that spin depolarization at the Fe/AlGaAs interface is more predominant rather than spin relaxation in the QW region.
In the 1990s, Habiro defined Ck-move of oriented links for each natural number k
. A Ck-move is a kind of local move of oriented links, and two oriented knots have
the same Vassiliev invariants of order [les ] k−1 if and only if they are transformed into
each other by Ck-moves. Thus he has succeeded in deducing a geometric conclusion
from an algebraic condition. However, this theorem appears only in his recent paper
, in which he develops his original clasper theory and obtains the theorem as a
consequence of clasper theory. We note that the ‘if’ part of the theorem is also shown
in , ,  and , and in  Stanford gives another characterization of knots
with the same Vassiliev invariants of order [les ] k−1.
Cerebrovascular accidents due to Moyamoya disease, a disorder characterized by arterial stenosis at the base of the brain accompanied by typical net-like collateral vessels, occurred in two young Japanese women with Graves' disease when they were in thyrotoxicosis. In one patient, a second attack of cerebral infarction occurred with the recurrence of thyrotoxicosis. Association of Moyamoya disease and Graves' thyrotoxicosis is rare and the pathegenetic relationship is discussed.
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