Impurity effect on Bogoliubov Fermi surfaces: Analysis based on iron-based superconductors

The effect of impurities on a superconductor with Bogoliubov Fermi surfaces (BFSs) is studied using a realistic tight-binding model. Based on the band structure composed of $d$-orbitals in tetragonal FeSe, whose S-doped sample is a potential material for BFS, we construct the superconducting state by introducing a time-reversal broken pair potential in terms of the band index. We further consider the effect of impurities on the BFS, where the impurity potential is defined as a local potential for the original $d$-orbitals. The self-energy is calculated using the (self-consistent) Born approximation, which shows an enhancement of the single-particle spectral weight on the Fermi surface. This is consistent with the previous phenomenological theory and is justified by the present more detailed calculation based on the FeSe-based material.Comment: 14 pages, 6 figure

非外傷性イベントと解離性体験に関する臨床心理学的研究

内容の要約広島大学(Hiroshima University)博士(心理学)Doctor of Philosophy in Psychologydoctora

Can Perceived Social Support Buffer Trauma Impacts? : On the Outcome of Posttraumatic Stress Responses and Dissociative Tendencies

This study investigated the ability of perceived social support (PSS) to buffer traumatic stress impacts by measuring posttraumatic stress responses (PTSR) and dissociative tendencies. A total of 163 undergraduate students (60 males and 103 females) were classified into traumatic (n = 23) and non-traumatic (n = 140) stress groups. Concerning dissociation on the basis of objective variables, the results of hierarchical multiple regression analysis indicated that PSS had a buffering effect. Concerning PSTR, however, the results of the same analysis indicated neither a significant nor direct effect of buffering. These results suggest that there are different mechanisms between dissociation and PTSR. Therefore, this study has determined that clinicians should make eff orts to distinguish between dissociation and PTSR so that they are perceived as supportive by their clients

NIMA-related kinases regulate directional cell growth and organ development through microtubule function in Arabidopsis thaliana.

NIMA-related kinase 6 (NEK6) regulates cellular expansion and morphogenesis through microtubule organizaiton in Arabidopsis thaliana. Loss-of-function mutations in NEK6 (nek6/ibo1) cause ectopic outgrowth and microtubule disorganization in epidermal cells. We recently found that NEK6 forms homodimers and heterodimers with NEK4 and NEK5 to destabilize cortical microtubules possibly by direct binding to microtubules and the β-tubulin phosphorylation. Here, we identified a new allele of NEK6 and further analyzed the morphological phenotypes of nek6/ibo1 mutants, along with alleles of nek4 and nek5 mutants. Phenotypic analysis demonstrated that NEK6 is required for the directional growth of roots and hypocotyls, petiole elongation, cell file formation, and trichome morphogenesis. In addition, nek4, nek5, and nek6/ibo1 mutants were hypersensitive to microtubule inhibitors such as propyzamide and taxol. These results suggest that plant NEKs function in directional cell growth and organ development through the regulation of microtubule organization

An Alternative Topological Field Theory of Generalized Complex Geometry

We propose a new topological field theory on generalized complex geometry in two dimension using AKSZ formulation. Zucchini's model is $A$ model in the case that the generalized complex structuredepends on only a symplectic structure. Our new model is $B$ model in the case that the generalized complex structure depends on only a complex structure.Comment: 29 pages, typos and references correcte

Cytoskeletal elements in an acoelomorph worm, Praesagittifera naikaiensis

Acoel flatworms can move in a variety of ways such as muscular and ciliary movements via cytoskeletal elements and their neural regulations. However, those locomotive mechanisms have not yet been fully elucidated. In this study, we examined the distribution of cytoskeletal elements including filamentous actin (F-actin) and tubulin, and the neuroanatomical organization in an acoelomorph worm, Praesagittifera naikaiensis (P. naikaiensis). Video microscopy revealed the elongation/contraction and the bending/rotation processes, and the ciliary gliding movement of P. naikaiensis. Histochemical and morphological analysis demonstrated that F-actin networks of inner longitudinal and outer circular muscle fibers were positioned along the entire surface of the body, and that the average distance between the circular muscle fibers in the contracted organism was decreased in the anterior region compared with that in the elongated organism. Electron microscopy showed dense bodies on the muscle cells of P. naikaiensis, which indicates that those muscle cells have the appearance of vertebrate smooth muscle cells. Immunohistochemical analysis revealed that -tubulin-positive signals on the ciliary microtubules had close contact with the F-actin network, and that neurite bundles labelled with anti dSap47 antibody as a neuronal marker run along the anterior-posterior body axis. These results indicate that the well-organized cytoskeletal elements and their neural control systems are preserved in P. naikaiensis, and that their mechanisms involved in those regulation systems are similar to those vertebrate systems. Further studies are needed to clarify the physiological mechanisms underlying the muscular and ciliary movements in P. naikaiensis

Attachment to parents and dependency on someone other than parents in adolescence : Does attachment really regulate interpersonal relationship?

In this study, we investigated the relationship between attachment to parents, dependency on someone other than parents, and independence in adolescence. The subjects were 246 undergraduate students (110 males, 131 females, and 5 unknown). Participants who answered that their dependency was on someone other than their parents were 150 (77 males, 69 females, and 4 unknown). The hierarchical multiple regression analysis indicated that the dependency on someone other than their parents affects independence. In particular, dependency on someone other than parents has a buffering effect between attachment to parents and collaborative interpersonal relationships. Our results suggest that adolescents who have unstable attachments to their parents can be adaptive in their development, if they can request psychological support or obtain a stable and secure dependency object.本稿は第二著者である東山花子(旧姓:尾崎)の卒業論文を加筆修正したものである。本誌の投稿資格の関係で主任指導教員が筆頭著者となって公刊する