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A study on the Ceiling Composition in Relation to the Seating Positions of the Host and the Guests in a Tea Room.
Get PDFapplication/pdfIn a tea room, the locations of a toko (alcove), a temaeza (host's mat) and kyakuza(guests’ mats) have been defined by the seating positions of the host and the guests, required by the manners of the tea ceremony. In this paper, we examine the various relations between the ceiling composition and the seating positions of the participants at a tea ceremony, concerning the 38 extant tea rooms. In conclusion, the temaeza and the kyakuza have played an important part in the selection of ceiling composition indispensable to the articulation of the interior space; the concept or philosophy of tea ceremony of the host, a tea master as well as an artist-architect, can be expressed in many ways of ceiling composition, among which the composition with 3 types of ceiling and the temaeza under an ochitenjyou (dropped ceiling) is the most eloquent.departmental bulletin pape
Basic Machining Characteristics of Super Heat Resistive Alloy lnconel 718
Get PDFapplication/pdfNi based heat resistive alloys such as Waspalloy, Nimonic or Inconel are very difficult-to-cut materiaｌs because of their low heat conductivity, highly adhesive characteristics or superior mechanical properties. Although great efforts have been made to improve their machining characteristics, they are yet remained as difficult-to-cut materials. In this report, basic machining characteristics of typical solution-treated-and-aged Inconel 718 are investigated for the reference of ordinal machine shop. Negative, positive and round cemented carbide K grade and some ceramic tools are tested and their tool wear and cutting forces are measured. Some of the obtained results prove clearly that they are very useful for the machining of heat resistive alloy.departmental bulletin pape
Improvements on a Web-based Examination System
Get PDFapplication/pdfWe have developed some education support systems using Web，and made some trials of the systems in our college. This paper reports one of the above systems，the Web-based examination system. There are many advantages in learning and examination using PC，compared to the conventional methods via books and paper texts. However，some problems such as authoring load and diversification of the test form and test security were pointed out. Here，by solving these problems，we present Web-based examination system that has advantages for both teachers and students .I n this system，security environment of the client PC was drastically improved further than the Web browser by the adoption of the secure exclusive client operation screen.departmental bulletin pape
ニアフィールドパターンで見るプラスティック光ファイバーの不均一性
Get PDFapplication/pdf短いプラスティック光ファイバー（POF）中のニアフィールドパターン（NFP）が不規則に変化することを見出したので報告する。光伝送モード分布の変化をファーフィールドパターン（FFP）を通して調べている課程において見出したものである。不均一性はモード結合、モード変換を通してモード分布への影響を与え、したがってパルス伝送波形、周波数特性に影響を与えると考えられる。conference pape
Use of the Acoustic Grading Method as Nondestructive Inspection to Measure the Elastic Modulus of Timbers for Experimental Education in Engineering
Get PDFapplication/pdfThe quality assurance of architectural timbers becomes more important because the Building Standard Law was revised in 2000 and the House Quality Assurance Law was enforced. There are two indices to timber strength. One is “Young's modulus" as the index at an initial deformation，and the other is“ultimate strength" as the index of failure. Recently，the Young's modulus can be measured by the Acoustic Grading Method. This is one of the so-called nondestructive inspection methods，which is to measure the sound while beating the timber side，and detect predominant frequency using FFT (Fast Fourier Transform) analysis. The Young's modulus obtained by the Acoustic Grading Method is compared with the moduli detected by the axial compression and flexural failure tests of the timbers.departmental bulletin pape
A Study of Trading Electricity in Microgrid
Get PDFapplication/pdfIn this paper, we propose a trading method of electricity in a microgrid. A microgrid is an energy system formed by the interconnection of small, modular generation (micro-turbines, fuel cells, PV, etc), with storage device (flywheels, energy capacitors and batteries) and controllable loads at low-voltage distribution systems. The aim of this study is to develop the method which gains the largest profit in trading electricity in the microgrid. Therefore, a practical application of the proposed trading electricity algorithm to a model system was tested on power system network. Numerical results are used to demonstrate the effectiveness and performance of the proposed system.departmental bulletin pape
AODVにおけるリンク切断予測方式の検討
Get PDFapplication/pdf現在、ユビキタス社会の中核となる技術としてアドホックネットワークが注目されている。アドホックネットワークとは、従来のアクセスポイントを使用したインフラストラクチャネットワークとは異なり、端末同士の通信を繰り返して目的端末までの経路を確立するネットワークのことである。 しかし、このアドホックネットワークには端末の移動などによるリンク切断の問題があり、安定的な運用に向けて大きな課題となっている。 そこで本研究では、この課題を解決するため、アドホックネットワークのルーティングプロトコルであるAODV [1] に、パケットの往復伝播遅延時間であるRTT（Round Trip Time）を用いたリンク切断予測機能の搭載を提案する。conference pape
並列処理を用いた電力設備停止計画問題の一解法
Get PDFapplication/pdf筆者らが提案する電力設備停止計画は，系統構成と作業日時を決定する組合せ問題である。従って実規模系統になると，その組合せも莫大となり，何らかのヒューリスティックな手法が必要とされる。しかしながら，その開発には厳密解を踏まえる必要がある。そこで本研究では，グリッドコンピューティングを利用した並列計算を行ったのでこれについて報告する。conference pape
On Rehabilitation of Steel Building Using Bonding Carbon Fiber Reinforced Plastic Plates
Get PDFapplication/pdfAging of existing steel buildings necessitate the development of simple and efficient rehabilitation technique. We have been developing a strengthening method with bonding Carbon Fiber Reinforced Plastic Plate (CFRP) to enhance the usage life of steel buildings. Coefficient of expansion of CFRP is one-tenth smaller than that of steel. The change of temperature during daytime and night amounts to 40℃ so that large thermal stress occurs in adhesive layer between CFRP and steel. Cyclic thermal stress causes degradation of the bonding strength. Further, CFRP and steel have electro-conductivity. Although the adhesive between CFRP and steel has non-electro-conductivity, intense rust (galvanic corrosion) may occur when CFRP partially touches steel member. The partial galvanic corrosion may deteriorate the bonding strength between CFRP and steel. In this study, Heat cycle tests on steel plate bonding CFRP are made to evaluate the durability of cyclic thermal stress. Also, galvanic corrosion tests under dry and wet cycle atmosphere using salt water are carried out. We show these basic data for infiuence of galvanic corrosion and cyclic thermal stress on bonding strength between CFRP and steel plate.departmental bulletin pape