1,013 research outputs found
An Optimal Configuration Design of Superconducting Magnets for DC Reactor Taking Loss into Account
Get PDFLarge-inductance DC reactors are often required in practical factories, and superconducting magnets represent an interesting alternative for the construction of such devices. It is therefore useful to obtain optimized designs for DC reactors, particularly for the minimization of the winding volume under many constraints. The superconducting magnets of DC reactors can be operated at higher temperature than that of SMES, since the rated current in the case of DC reactors is much smaller. To operate at high temperature (77 K) makes the coolant cost low. However, the flux flow loss becomes large at 77 K, and then it has to be taken into account at the design stage. In this paper, the optimized configurations of toroidal superconducting magnets for DC reactor are presented and the configurations of HTS conductor are investigated under taking the flux flow loss into account
DESIGN OF DEPLOYABLE BAR STRUCTURE DEVELOPED FROM YOSHIMURA-PATTERN RIGIDORIGAMI
Get PDFWe develop a new type of deployable bar structure that simulates the folding process of rigid origami called Yoshimura-pattern. Since Yoshimura-pattern origami has multi-DOFs (degrees-of-freedom), it can be folded symmetrically and asymmetrically with respect to parallel valley fold-lines. In our proposal, additional revolute joints are assigned to restrict asymmetric motion of the mechanism and reduce DOFs. To confirm the deployability, we evaluate the DOFs of the mechanisms in various states using singular value decomposition of equilibrium matrix. The size of bars and the offset of joints are rigorously considered. Small-scale physical models are also assembled to confirm the deployability
Marine Benthic Algae from the Leeward Hawaiian Group
Get PDF"Reprinted from ATOLL RESEARCH BULLETIN NO. 115 THE PACIFIC SCIENCE BOARD NATIONAL ACADEMY OF SCIENCES - NATIONAL RESEARCH COUNCIL"The following is an account of all the marine benthic algae accumulated by the author from various collectors from six of the nine islands in the Leeward Hawaiian Group (Nihoa, Necker, French Frigate Shoals, Lisianski, Pearl and Hermes Reef, Kure). The islands comprising this group consist of remnants of nine former high islands which at present make up low volcanic islands, reefs, and atolls. They extend approximately 1300 miles Northwest from Kauai and are located between 23º 05' N. and 28º 25' N. latitude and 161º 58' W. and 178º 25' W. longitude. Also included in this paper are the corrected specific epithets of three species of Liagora and one species of Halimeda which were reported inaccurately from Laysan Island (Tsuda, 1965) and Midway Island (Buggeln, 1965)
An Optimal Configuration Design of Superconducting Magnets with HTS Tapes for DC Reactor
Get PDFLarge-inductance DC reactors are often required in practical factories, and superconducting magnets represent an interesting alternative for the construction of such devices. It is therefore useful to obtain optimized designs for DC reactors, particularly for the minimization of the winding volume under many constraints. In this paper the optimized configurations of toroidal superconducting magnets for DC reactor are presented and the configurations for SMES are compared
Spinal dorsal horn astrocytes: New players in chronic itch
No full textAbstractChronic itch is a debilitating symptom of inflammatory skin conditions, such as atopic dermatitis, and systemic diseases, for which existing treatment is largely ineffective. Recent studies have revealed the selective neuronal pathways that are involved in itch sensations; however, the mechanisms by which itch turns into a pathological chronic state are poorly understood. Recent advances in our understanding of the mechanisms producing chronic itch have been made by defining causal roles for astrocytes in the spinal dorsal horn in mouse models of chronic itch including atopic dermatitis. Understanding the key roles of astrocytes may provide us with exciting insights into the mechanisms for itch chronicity and lead to a previously unrecognized target for treating chronic itch
The Orientation of the Frog's Egg
Get PDFThe classical experiments of Pflüger on the segmenting frog's egg, and the important conclusions drawn by Roux from a study of the same egg, have made it very desirable to have an accurate knowledge of the relation existing between the early segmenting egg and the position of the embryo with respect to the egg.
Our work in relation to the orientation of the embryo has covered the ground somewhat more extensively than that of any previous author, since we have made use of the methods employed by all of them.
Our results will be considered under three headings:
1st. Normal development and location of blastopore.
2nd. Results obtained by injury to definite portions of the early embryo.
3rd. Results obtained from embryos whose development had been modified by artificial means.
A word of personal explanation ought to be added. The senior author is responsible for Sections I, II, IV, and V of the present paper. The work recorded in these was done in the spring of 1893.
Section II is the record of the results obtained by Umè Tsuda while a student in the Biological Laboratory of Bryn Mawr College. This work was done during the winter of 1891-2 j the account written in the spring of 1892. Only very slight alterations have been made in this portion preparatory to publication
Images Of Class- Spaces
No full textAbstractIn this paper the author characterizes images of class- spaces (as defined by Ishii, Tsuda and Kunugi, Proc. Japan Acad. 44, (1968), 897-903) under almost-open maps, bi-quotient maps, pseudoopen maps and quotient maps.</jats:p
Reading the Binary Oppositious in Soseki Natsume's Meian (Light and Darkness)
Get PDF40020040028application/pdfThis essay considers Soseki Natsume's novel Meian(1916), unfinished at the author's death, and tries to illuminate the binary structure underlying the text. Although the title itself, Light and Darkness in English, refers to such a binary opposition, the structure of the binary in the book is not so evident. This essay carefully picks up some examples of the contra-distinctive plots in Meian, and concludes that the author intentionally set them there. Once the binary structures are set, however, they show vulnerability and fragility, opening up the door to a deconstructive moment.
From the perspective of the structural characteristics peculiar to this text, we trace the ways in which the author tries to mend Tsuda, the antagonist, who is described as a modern man, suffering from not only a bodily disease (haemorrhoids) but also mental corruption. We analyze the four treatments the author gives for Tsuda's malady. The first is implemented by Kobayashi, Tsuda's friend. The second is from a beggar, whom Tsuda catches a glimpse of. The third is from a letter written by an unknown person whom Tsuda feels a queer sympathy with, in spite of a disparity in their status. He at first finds all three apparently alienated and far away from himself. But, in the end, he is obliged to recognize that he has something in common with them, even that he is close to them. Tsuda's treatment is gradually implemented by this acknowledgement that he is even close to those whom he despised till then.
As the final treatment for Tsuda, he must confront Kiyoko, who left him for another man, and determine what she really thinks and who she really is. These questions are still a total enigma to Tsuda, who cannot forget Kiyoko even though he is married to another woman. This essay tries to take over this enigma from the author who did not finish the novel, and, in the light of the structural pattern of the text, to explain to derive the final answer that Tsuda may conclude. Even in the final treatment, in Kiyoko, he will have to acknowledge two conflicting elements, innocence and art, and to accept the way that they are reconciled in her personality.departmental bulletin pape
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