The most general second-order field equations of bi-scalar-tensor theory in four dimensions

The Horndeski theory is known as the most general scalar-tensor theory with second-order field equations. In this paper, we explore the bi-scalar extension of the Horndeski theory. Following Horndeski's approach, we determine all the possible terms appearing in the second-order field equations of the bi-scalar-tensor theory. We compare the field equations with those of the generalized multi-Galileons, and confirm that our theory contains new terms that are not included in the latter theory. We also discuss the construction of the Lagrangian leading to our most general field equations.Comment: 21 page

Finite temperature Mott transition in Hubbard model on anisotropic triangular lattice

We investigate the Hubbard model on the anisotropic triangular lattice by means of the cellular dynamical mean field theory. The phase diagram determined in the Hubbard interaction versus temperature plane shows novel reentrant behavior in the Mott transition due to the competition between Fermi-liquid formation and magnetic correlations under geometrical frustration. We demonstrate that the reentrant behavior is characteristic of the Mott transition with intermediate geometrical frustration and indeed consistent with recent experimental results of organic materials.Comment: 5 pages, 6 figure

Finite-Temperature Mott Transition in Two-Dimensional Frustrated Hubbard Models

We investigate the Hubbard model on two typical frustrated lattices in two dimensions, the kagome lattice and the anisotropic triangular lattice, by means of the cellular dynamical mean field theory. We show that the metallic phase is stabilized up to fairly large Hubbard interactions under strong geometrical frustration in both cases, which results in heavy fermion behavior and several anomalous properties around the Mott transition point. In particular, for the anisotropic triangular lattice, we find novel reentrant behavior in the Mott transition in the moderately frustrated parameter regime, which is caused by the competition between Fermi-liquid formation and magnetic correlations. It is demonstrated that the reentrant behavior is a generic feature inherent in the Mott transition with intermediate geometrical frustration, and indeed in accordance with recent experimental findings for organic materials.Comment: 20 pages, 19 figures, to be published in the proceedings of YKIS2007 conference as a special issue of Prog. Theor. Phys. Supp

有機塩基の塩のペーパークロマトグラフィー

Reprinted from the Journal of the Phamaceutical Society of Japan Vol.71, No.12, 1393

Ectopic Cilia: A Histopathological Study

Cilia are normally found at the eyelid margin, while ectopic cilia are one or more lash follicles appearing in an abnormal position within the eyelid. We herein report two cases of cilia located in the palpebral conjunctiva. A 31-year-old female and a 46-year-old male presented with ectopic cilia in the superior palpebral conjunctiva. Histopathological study of the excised ectopic cilia and related lesions showed the cilia-related lesion to be located in the epithelial pit that contains goblet cells, which is consistent with the crypts of Henle. The hair follicle was surrounded by granulation tissue, while a dermal papilla and a hair matrix, which are known to produce hair follicles, did not exist in the excised tissue. While anterior ectopic cilia are congenital, ectopic cilia in the palpebral conjunctiva may be acquired, and these aberrant cilia are associated with crypts of Henle and chronic inflammation

Tissue factor expression in human pterygium

Purpose: A pterygium shows tumor-like characteristics, such as proliferation, invasion, and epithelial–mesenchymal transition (EMT). Previous reports suggest that tissue factor (TF) expression is closely related to the EMT of tumor cells, and subsequent tumor development. In this study, we analyzed the expression and immunolocalization of TF in pterygial and normal conjunctival tissues of humans. Methods: Eight pterygia and three normal bulbar conjunctivas, surgically removed, were used in this study. Formalinfixed, paraffin-embedded tissues were submitted for immunohistochemical analysis with anti-TF antibody. Double staining immunohistochemistry was performed to assess TF and alpha-smooth muscle actin (α-SMA) or epidermal growth factor receptor (EGFR) expression in the pterygia. Results: Immunoreactivity for TF was detected in all pterygial tissues examined. TF immunoreactivity was localized in the cytoplasm of basal, suprabasal, and superficial epithelial cells. The number of TF-immunopositive cells in pterygial epithelial cells was significantly higher than in normal conjunctival epithelial cells (p<0.001). TF immunoreactivity was detected in α-SMA-positive or -negative pterygial epithelial cells. EGFR immunoreactivity was detected in pterygial epithelium, which was colocalized with TF. Conclusions: These results suggest that TF plays a potential role in the pathogenesis and development of a pterygium, and that TF expression might be involved through EMT-dependent and -independent pathways

Social skills and loneliness in junior high school students

The purposes of this study were to examine the relationship between social skills and loneliness, and to contribute to prevention and intervention of loneliness in junior high school students. Questionnaires were administered to 83 students (45 males and 38 females). Correlation analysis showed that loneliness score was negatively related to the scores of peer reinforcement, social initiation, conflict resolution and assertion skills, and also positively related to the score of withdrawal behaviors. In addition, this study found gender differences in the role of social skills and problem behaviors on loneliness. Boys' loneliness was negatively related to peer reinforcement, social initiation, and assertion skills, and girls' loneliness was negatively related to conflict resolution skills, whereas both boys' and girls' loneliness were associated with withdrawal behaviors. These findings were discussed in terms of the context of social skills training