Chiral Phase Transitions in QCD at Finite Temperature: Hard-Thermal-Loop Resummed Dyson-Schwinger Equation in the Real Time Formalism

Chiral phase transition in thermal QCD is studied by using the Dyson-Schwinger (DS) equation in the real time hard thermal loop approximation. Our results on the critical temperature and the critical coupling are significantly different from those in the preceding analyses in the ladder DS equation, showing the importance of properly taking into account the essential thermal effects, namely the Landau damping and the unstable nature of thermal quasiparticles.Comment: 4 pages including 2 figures (ps file), to appear in the proceedings of the 4th International Conference on Physics and Astrophysics of Quark-Gluon Plasma (ICPAQGP-2001), 26-30 November 2001, Jaipur, Indi

Chiral Phase Transitions in QED at Finite Temperature: Dyson-Schwinger Equation Analysis in the Real Time Hard-Thermal-Loop Approximation

In order for clarifying what are the essential thermal effects that govern the chiral phase transition at finite temperature, we investigate, in the real-time thermal QED, the consequences of the Hard-Thermal-Loop (HTL) resummed Dyson-Schwinger equation for the physical fermion mass function $\Sigma_R$. Since $\Sigma_R$ is the mass function of an ``unstable'' quasi-particle in thermal field theories, it necessarily has non-trivial imaginary parts together with non-trivial wave function renormalization constants. In the present analysis we correctly respect this fact, and study, in the ladder approximation, the effect of HTL resummed gauge boson propagator. Our results with the use of numerical analysis, show the two facts; i) The chiral phase transition is of second order, since the fermion mass is dynamically generated at a critical value of the temperature $T_c$, or at the critical coupling constant $\alpha_c$, without any discontinuity, and ii) the critical temperature $T_c$ at fixed value of $\alpha$ is significantly lower than the previous results, namely the restoration of chiral symmetry occurs at lower temperature than previously expected. The second fact shows the importance of correctly taking the essential thermal effect into the analysis of chiral phase transition, which are, in the previous analyses, neglected due to the inappropriate approximations. The procedure how to maximally respect the gauge invariance in the present approximation, is also discussed.Comment: Revtex4 with 6 figures, 11 page

Posterior Fixation of a Cervical Fracture Using the RRS Loop Spine System and Polyethylene Tape in an Elderly Ankylosing Spondylitis Patient: A Case Report

An 80-year-old woman presented with neck pain and paraparesis of Frankel C in her upper and lower extremities after falling. Imaging revealed an ankylosing cervical spine and a fracture line running obliquely from the anterior C3-4 to the posterior C4-5 level. Posterior fixation from the occi pit to T3 was performed using the RRS Loop Spine System and concomitant polyethylene tape fixation. This system is characterized by the uniqueness of how it screws to the occi pit and its use of a fixation rod with a larger diameter than in other instrumentation devices for use in the cervical region. Sublaminar banding using polyethylene tape was used to secure fixation. Her postoperative course was unremarkable, and her neck pain was relieved, although neurological improvement was minor. To our knowledge, this is the first report of an application of the RRS Loop Spine System to an ankylosing spondylitis patient with a cervical fracture

プラスミド複製開始タンパク質の構造と活性の相関に関する研究

取得学位：博士(薬学)，学位授与番号：博甲第429号，学位授与年月日：平成13年3月31日,学位授与年：200

遠藤周作と世田谷（２）―昭和女子大学との関わりから―

　　This paper introduces an essay and a lecture related to Shusaku Endo and Showa Women’s University （SWU） in Setagaya, and examines Endo’s views about literary criticism.　　The essay, “Watakushi no Nikki” （My Diary）, was published in Shincho in February 1964. In it Endo confesses that he writes lies in his diary and mocks the approach of SWU students who collect tips about the authors’ private lives in order to interpret those authors’ works. Endo, at that time, advocated a theory called “Criticism of Metaphysics” which asserts that readers and critics must interpret literary works based only on the works themselves, not on facts or ideas about the authors’ lives. This was sharply opposed to the approach advocated by SWU’s Kindai Bungaku Kenkyu Sosho （The Serial Study of Modern Literature, 77 vols, The Institute of Modern Culture, SWU, 1956-2001）.　　The lecture, “My Literature and Life,” was delivered to students of SWU on 22 October, 1982. No record is left of the lecture itself, but a printed description of a student’s impressions allows us to guess what he talked about. In this lecture Endo seems to have mentioned the unreliability of his own diary but also points out that in his work he pursues truth rather than facts. This seems to be a criticism of the above-mentioned ongoing study in　which efforts were made to demonstrate causal relationships between authors’ lives and their works, but at the same time seems to be an encouragement to the students to pursue truth

遠藤周作と世田谷（一）

This paper is the first part of a serial work on the biographical details of Shusaku Endo （1923-1996） whose complete diaries （Endo Shusaku Zen-Nikki, in 2 volumes） were published in 2018. The author focuses on the time Endo spent in Setagaya, Tokyo, where he resided for more than 10 years between 1942 and 1958, except for some intervals away from the place. The author discusses the relationship between the novelist and Setagaya.The author delves into Endo’s essays, fictions, recollections by his wife, writings by his teachers and other contemporaries, and looks at the social background to Endo’s life such as transportation route maps, and tries to understand what motivated the author to become a writer for life during his days in Setagaya. The first two sections on “The sense of shame and guilt toward his mother“ and “An encounter with Saku Sato” suggest that Endo flew from the pressure he felt from his Christian mother and moved from Kansai to Setagaya where his divorced father lived. There, by chance, he got a book Outline of French Literature （Furansu Bungaku Sobyo, 1940） by Saku Sato, who became his mentor. The author concludes that, thanks in part to encounters with Saku Sato and other literary friends, this period in Setagaya was instrumental in Endo’s formation. （To be continued.