1,210 research outputs found
Capacitors
No full textThis webpage is part of a larger site by the author about electronic circuit engineering. This page introduces the reader to capacitors, including the principles behind how they work. Explanations of several different types of capacitors (including Electrolytic, Tantalum, and Mica) are accompanied by detailed color illustrations of the concepts
Lecideoid lichens of Prince Olav Coast and Soya Coast, Enderby Land, East Antarctica
No full textFive species of lecideoid lichens belonging to three genera are reported as new to the flora of the Prince Olav Coast and the Soya Coast, Enderby Land, East Antarctica; they are Carbonea capsulata (DODGE & BAKER) HALE, Lecidea andersonii R. FILSON, Lecidea cancriformis DODGE & BAKER, Lecidea soyaensis M. INOUE and Lecidella siplei (DODGE & BAKER) M. INOUE. All are endemic to Antarctica. An examination was made of the collections from the region, which were collected mainly by the author under the project of the 27th Japanese Antarctic Research Expedition (JARE-27,during January 1986 and February 1987). The type and authentic specimens of possibly related species have been restudied. Lecidea soyaensis M. INOUE is new to science and Lecidella siplei (DODGE & BAKER) M. INOUE is proposed as a new combination. Taxonomic and chemical data as well as a key to the known taxa are provided
The Hobby of Electronic Circuit Engineering
No full textThis website (originally created in Japanese and translated into English using translation software) by a Japanese systems engineer, Seiichi Inoue, provides an extensive overview of electronic circuit engineering. Topics covered include: Basic knowledge of Electronic parts, Basic knowledge of Engineering Instruments, an Introduction of Engineering Method, and the Assembly Process. A variety of electronic circuits and their uses are provided, as well as a separate section on PIC electronic circuits. The language may be difficult to follow at times given the translation, but still a gem of a site for anyone wanting to build some circuits! Keep in mind that in some sections, the author notes that he is "describing while studying, there seems to be mistakes in the contents. Do at your own risk." For some further browsing, he includes sections on his other interests, such as 3D photography, java programming, CAD, Japanese customs and the Japanese language
The link among classical, quantum and combinatorial integrable dynamical systems (Combinatorial Aspect of Integrable Systems)
No full textCluster mutation and 3D integrability (Recent developments in mathematics of integrable systems)
No full text三次元格子模型の可積分性を記述する四面体方程式の解を，量子クラスター代数と量子dilogarithm関数を用いて構成する方法を[IKT23a]に従って紹介する．四面体方程式に対して[SY22]で導入された方法を発展させ，量子変数の成す非可換代数をワイル代数へ埋め込むことによってYang-Baxter変換を随伴作用として表すことに成功した．これより四面体方程式の解が得られる．We introduce a method to construct the solutions of tetrahedron equation based on [IKT23a], by developing the strategy proposed in [SY22] using quantum cluster algebras and quantum dilogarithm functions. We embed the noncommuting algebra generated by quantum -variables into the -Weyl algebra, and construct an adjoint operator which realizes the Yang-Baxter map. This gives the solutions of tetrahedron equation
Cluster realization of Weyl groups (Mathematical structures of integrable systems and their applications)
No full text"Mathematical structures of integrable systems and their applications". September 5-7, 2018. edited by Shinsuke Iwao. The papers presented in this volume of RIMS Kôkyûroku Bessatsu are in final form and refereed.Kac-Moody Lie環gと2以上の整数mに対して, 重み付きquiver Qm(g)を定める. このquiverのクラスターモジュラー群の部分群としてgのワイル群を実現し, さらにgreen列とクラスターDonaldson-Thomas変換への応用について紹介する. この内容は石橋典氏, 大矢浩徳氏との共同研究[IIO19]の一部に基づく.For a Kac-Moody Lie algebra g and an integer m bigger than 1, we define a weighted quiver Qm(g). We realize the Weyl group for g as a subgroup of the cluster modular group for Qm(g), and introduce its application to green sequences and the cluster Donaldson-Thomas transformation. It is based on a part of a joint work [IIO19] with Tsukasa Ishibashi and Hironori Oya
The distribution of first-passage times and durations in FOREX and future markets
No full textPossible distributions are discussed for intertrade durations and first-passage processes in financial markets. The view-point of renewal theory is assumed. In order to represent market data with relatively long durations, two types of distributions are used, namely a distribution derived from the Mittag Leffler survival function and the Weibull distribution. For the Mittag-Leffler type distribution, the average waiting time (residual life time) is strongly dependent on the choice of a cut-off parameter tmax, whereas the results based on the Weibull distribution do not depend on such a cut-off. Therefore, a Weibull distribution is more convenient than a Mittag Leffler type if one wishes to evaluate relevant statistics such as average waiting time in financial markets with long durations. On the other hand, we find that the Gini index is rather independent of the cut-off parameter. Based on the above considerations, we propose a good candidate for describing the distribution of first-passage time in a market: The Weibull distribution with a power-law tail. This distribution compensates the gap between theoretical and empirical results more efficiently than a simple Weibull distribution. It should be stressed that a Weibull distribution with a power-law tail is more flexible than the Mittag Leffler distribution, which itself can be approximated by a Weibull distribution and a power-law. Indeed, the key point is that in the former case there is freedom of choice for the exponent of the power-law attached to the Weibull distribution, which can exceed 1 in order to reproduce decays faster than possible with a Mittag Leffler distribution. We also give a useful formula to determine an optimal crossover point minimizing the difference between the empirical average waiting time and the one predicted from renewal theory. Moreover, we discuss the limitation of our distributions by applying our distribution to the analysis of the BTP future and calculating the average waiting time. We find that our distribution is applicable as long as durations follow a Weibull law for short times and do not have too heavy a tail
Poet of Perpetuity and Stagnation: Inoue Yasushi\n―On the Resonance of Youth and Antiquity in Ikoku no Hoshi
No full textpdfInoue Yasushi was an author who has continuously written on the history of the West and the dialogue between Eastern and Western cultures. His literary world consists of genres such as historical novels, biographical novels, and prose poems, but each contains a storytelling structure. Ikoku no Hoshi (1984) likewise has its own form of storytelling. Recording his journey in his 70s along the Silk Road, from northern Siberia, the northern and southern roads of Tien Shan, and the Taklamakan Desert, to Pamir and Pakistan, following the path of Genjō Sanzō, and finally to Istanbul, Ikoku no Hoshi is a challenging work from late in his career. As can be seen from the titles “Gilgit Correspondence”, “Kaxgar Diary”, “Himalayan Moon”, “Letter from the Desert”, The town of Amurskaya”, “Crossing point on the Indus”, “Yumen Notebook”, “At the foot of India (Tenjiku), 1 and 2”, it is a truly grand prose poetry collection. Made up of correspondences, diaries, journals, and notebooks, it is not merely a collection of writings, but is designed to be a prose poem. The secret lies in the world of Inoue Yasushi’s dignified “prose meter”. Inside is hidden a deep and sacred philosophy-perpetuity and stagnation. Of course, the places, times, things, people, thoughts, and events he encountered act as devices for memory. Inoue Yasushi is not the kind of poet or writer who abandons a relation in order to focus on discussing himself. In Ikoku no Hoshi, he touches relentlessly on places he has been in life, experiences during wartime, and people he has met, drawing on memories of the past in order to speak to the deceased. At other times he brings his youth back from his memory to form a dialog with his present self or history of the distant past. It contains a vibrant textuality between his youth and history. This presentation looks at the infrequently examined structure and characterizations in Ikoku no Hoshi through Inoue Yasushi’s prose poems. In addition, through the many thoughts of lnoue Yasushi seen in the deceased author of The Star of Samarkand and his letters to numerous anonymous people, I will examine poet Inoue Yasushi’s philosophy of perpetuity and stagnation.conference pape
Physical properties of amorphous Al-Gd-transition metal alloys
No full textAmorphous alloys of the composition Al65Gd15Cu20 and Al1Gd1Fe1 have been prepared by rapid quenching from the melt. The alloys have been studied by X-ray diffraction, thermal analysis and SQUID magnetization methods. Thermal analysis results show crystallization temperatures of 647 and 945 K for Al-Gd-Cu and Al-Gd-Fe, respectively. For Al-Gd-Cu, magnetization measurements show Curie-like behaviour with a localized Gd magnetic moment of 8.0mu(B). Magnetic measurements of Al-Gd-Fe show conventional ferromagnetic behaviour. The Curie temperature is found to be 275 K and a saturation magnetization of 124 emu/g is measured at 4.2 K in an applied magnetic field of 1 T.PT: J; CR: DUNLAP RA, 1989, PHYS REV B, V39, P4808 DUNLAP RA, 1990, J PHYS CONDENS MATT, V2, P4315 DUNLAP RA, 1990, UNPUB HE Y, 1988, SCIENCE, V241, P1640 INOUE A, 1981, J MATER SCI, V16, P1989 INOUE A, 1988, JPN J APPL PHYS, V27, P1796 INOUE A, 1988, JPN J APPL PHYS, V27, L1579 INOUE A, 1988, JPN J APPL PHYS, V27, L479 OHANDLEY RC, 1991, HDB MAGNETIC MATERIA, V6, P453 SRINIVAS V, 1990, J APPL PHYS, V67, P5879 SUZUKI RO, 1985, J MATER SCI, V18, P1195 YEWONDWOSSEN M, 1990, THESIS DALHOUSIE U YEWONDWOSSEN M, 1992, J PHYS-CONDENS MAT, V4, P461; NR: 13; TC: 1; J9: J NON-CRYST SOLIDS; PN: Part 1; PG: 3; GA: LC964Source type: Electronic(1
Extended C*-Algebras and Extended W*-Algebras
No full textIn this chapter, we discuss GB*-algebras of closable operators in a Hilbert space. Thus, the reader has the chance to encounter the basics of unbounded *-representations, with various uniform topologies defined on the *-preserving vector space ℒ†(D, ℋ) of all linear operators T with domain a dense subspace D of a Hilbert space ℋ and values in ℋ, in such a way that D is contained in the domain D(T∗) of the adjoint operator T∗ of T. The restriction of T∗ on D defines an involution on ℒ†(D, ℋ), detoted by †. Moreover, we deal with EC*-algebras and EW*-algebras (Inoue) that correspond to unbounded generalizations of the classical C*- and W*-algebras, respectively. The latter algebras occur naturally in the analysis of an unbounded generalization of left Hilbert algebras (Inoue). There are interesting contributions of EC*-algebras, in the theory of GB*-algebras. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG
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