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RISS 인기검색어
- 검색키워드
- 저자 : Makoto Anzai (검색결과 2 건)
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Homer and Hesiod on Two Societies: Hellas / Barbaroi
Makoto Anzai 韓國西洋古典學會 2012 西洋古典學硏究 Vol.49 No.-
Here I call the last poet(s) in the oral heroic epic tradition in Ancient Greece who has created the Iliad and the Odyssey as “Homer”. And here I discuss about the two poets’ (Hesiod and “Homer”) difference in their views of the two ethnic groups, Hellenes and Barbaroi, after making sure that Hesiod makes us realize that, unlike Homer, he had a clear idea of the world outside the Hellenic world: he certainly made a distinction between two groups (frg. 130 M‐W, Op.527f., 651‐3). Since generally the notion of national or ethnic unity needs a fairly long period for its establishment among the people concerned, we could consider that the difference is signaling a considerable difference between the two poets’ times. This possibly implied chronological distance between them is, though, against the popular ancient view that they were contemporaries. Probably also this distance is against the major current view among classicists, certainly it is against my view. I suggest in this paper a new way of explanation for the difference of their views about the world. I suggest that the difference does not necessarily involve a chronological distance between them. I try an explanation based on the different modes of epic narration by the two poets. Homer on the one hand narrates traditional heroic world in a traditional form: he narrates from behind the scenes or the stages (to borrow the explanation of epic narration offered by Plato in Republic 393B‐D). Hesiod, on the other, never hides himself behind the flow of his epic narration: he builds up his epic narration, although many materials of his poems are mythic and legendary, totally on his individual thoughts and his own daily world. His new mode (it is certainly an innovation introduced by him) of epic narrative made it possible for him to introduce his recently acquired vocabularies about his own daily world, such as “Hellas” into his epic narration.
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Parametric study of porous media as substitutes for flow-diverter stent
Ohta, Makoto,Anzai, Hitomi,Miura, Yukihisa,Nakayama, Toshio Techno-Press 2015 Biomaterials and biomedical engineering Vol.2 No.2
For engineers, generating a mesh in porous media (PMs) sometimes represents a smaller computational load than generating realistic stent geometries with computer fluid dynamics (CFD). For this reason, PMs have recently become attractive to mimic flow-diverter stents (FDs), which are used to treat intracranial aneurysms. PMs function by introducing a hydraulic resistance using Darcy's law; therefore, the pressure drop may be computed by test sections parallel and perpendicular to the main flow direction. However, in previous studies, the pressure drop parallel to the flow may have depended on the width of the gap between the stent and the wall of the test section. Furthermore, the influence of parameters such as the test section geometry and the distance over which the pressure drops was not clear. Given these problems, computing the pressure drop parallel to the flow becomes extremely difficult. The aim of the present study is to resolve this lack of information for stent modeling using PM and to compute the pressure drop using several methods to estimate the influence of the relevant parameters. To determine the pressure drop as a function of distance, an FD was placed parallel and perpendicular to the flow in test sections with rectangular geometries. The inclined angle method was employed to extrapolate the flow patterns in the parallel direction. A similar approach was applied with a cylindrical geometry to estimate loss due to pipe friction. Additionally, the pressure drops were computed by using CFD. To determine if the balance of pressure drops (parallel vs perpendicular) affects flow patterns, we calculated the flow patterns for an ideal aneurysm using PMs with various ratios of parallel pressure drop to perpendicular pressure drop. The results show that pressure drop in the parallel direction depends on test section. The PM thickness and the ratio of parallel permeability to perpendicular permeability affect the flow pattern in an ideal aneurysm. Based on the permeability ratio and the flow patterns, the pressure drop in the parallel direction can be determined.
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