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Article type: Cover
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Published: September 18, 2005
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Article type: Appendix
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Article type: Appendix
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Article type: Index
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Published: September 18, 2005
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Masashi ONO, Takashi WATANABE
Article type: Article
Session ID: 831
Published: September 18, 2005
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This paper proposes a tracking system that is equipped with active vision agents communicating with each other. We set up them at any number of places to realize an optimized tracking in a wide 3-D field. We present a dynamic calibration method, which enables us to calibrate the extrinsic parameters of cameras automatically and simultaneously. Each camera traces a common object and detects corresponding points that are used to determine extrinsic parameters. The calibrated cameras use their pan, tilt and zoom facilities and cooperatively estimate the positions of a moving object in a 3-D field.
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Yu HOSHINO, Katuji OOGANE
Article type: Article
Session ID: 832
Published: September 18, 2005
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In this paper, we propose the semi autonomous control method to aim to decrease the control person's load in the rescue robot control. The semi autonomous control that needs the switch of an autonomous action and semi autonomous it is switched by judging the robot. When the robot is judging that the robot can act safety, the robot acts autonomous, and the robot leaves own control to controller, when the robot is judging dangerous. When the robot acts autonomous, the robot needs the environment recognition of three dimensions. In this study, we confirmed the effectiveness of environment recognition of three dimensions by the stereo vision, and then verified the validity of the control method.
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Yuji TAKAGI, Takuji KAMADA, Hiroyuki SOGO
Article type: Article
Session ID: 833
Published: September 18, 2005
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The semiautomatic small mobile robot that picks up the tiny object dropped instead of the person is described. The use of this robot assumes the case where the user of the wheelchair drops the thing to the narrow space. The robot is basically controlled by the person. And, when the person doesn't control easily, the robot moves by the automatic operation. The robot is controlled by using personal computer and PIC (Peripheral Interface Controller) and recognizes the target object using two cameras. As a result, the burden of the user can be decreased. This paper reports the machine structure and the system configuration of the small mobile robot developing.
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Hideo NAKAGAWA, Keigo YOSHIMURA
Article type: Article
Session ID: 834
Published: September 18, 2005
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This paper proposes 3-DOF(three degree of freedom joint) unit the end-effector can be moved around X and Y axis, and Z axially. The manipulator with this 3-DOF composition is space-saving because big expansion and contraction is possible. In addition, this proposes the orbit control rule of the super-multi joint manipulator composed of the unit with serial. Generally the inverse kinematics of a super-multijoint manipulator is complex, but it can be driven on an easy control rule only. The proposed joint unit was made for trial, and the movement test confirmed allowable operation.
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Tetsuya NAKAO, Shuji TANAKA
Article type: Article
Session ID: 835
Published: September 18, 2005
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The remote operations of various fields have a benefit effect on a unified hand/arm master-slave system. We made master-slave system like scissors which is separated. We adapted the parallel control method to the master-slave bilateral control system. The experimental results showed that the position is satisfactorily controlled by PD control with pole assignment techniques but is not satisfactorily controlled by PID control. The force reflection is also satisfied controlled by the parallel control method.
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Takashi SAIKAWA, Norihiko SAGA, Hideharu OKANO
Article type: Article
Session ID: 836
Published: September 18, 2005
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We have aimed at the development of the robot arm that operates safely on the site of nursing and welfare. Therefore, we develop the robot arm that is used a pneumatic artificial muscle as the actuator. Before time, the robot arm with antagonism structure that is used a pneumatic artificial muscle unit as the actuator is developed. But the angle of the joint can't be filled enough with such a robot arm. Then, we proposed the system that improved amount of shrinkage and contractile force, and the robot arm that had the joint drive angle equal with human was developed. Result of experiment of arm drive, the joint drive angle equal with human is achieved, and the effectiveness of the mechanism was confirmed.
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Manabu ONO, Masahiro SAKAYORI, Hidenori TAKIZAWA, Shigeo KATO
Article type: Article
Session ID: 837
Published: September 18, 2005
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This paper describes a prototype of a new in-pipe mobile robot. A fabricated robot is structured by three rubber bellows, lots of friction rings, three springs and three electromagnetic valves. A robot is driven by pneumatic pressure and elastic force of spring. The pressure is switched by the electromagnetic valve. The pneumatic pressure is used to expand and the elastic force is used to contract the rubber bellows. The friction rings converts the expansion and contraction movement into the advancement drive. Consequently, the in-pipe mobile robot moves freely in the pipe and robot generates the traction force of 90N.
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Manabu OTSUKI, Manabu ONO, Shigeo KATO
Article type: Article
Session ID: 838
Published: September 18, 2005
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We discuss fabrication of a new in-pipe microrobot consisting of two friction brake mechanism structured by a rubber bellows having six rubber friction brakes and a moving mechanism that drives the microrobot by expanding and contracting. We confirmed microrobot moving characteristics by robot's elements.
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Hiroyuki HARADA, Tadao KAGIWADA
Article type: Article
Session ID: 839
Published: September 18, 2005
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A trial of particle simulation of snow and snake-like mechanical systems which is moving in the snow pack is reported. The mechanical property of snow pack is modeled by particles with the constant resistant force against the motion and elastic contact of inter-particles. Values of parameters are determined from the published experimental results of actual snow. Three motion patterns are applied: sin curve, serpenoid curve, multilink. It is shown that when wave lengths of each mode are the same, their performances are also very similar, regardless of motion patterns. However, when the body length is longer, stability is worsening even in the same motion pattern. These results suggest that the dynamic controlled and adaptive wriggling motion is necessary to achieve more efficient locomotion.
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Tomoyuki SAITO, Tadao KAGIWADA, Hiroyuki HARADA
Article type: Article
Session ID: 840
Published: September 18, 2005
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This research aims at developing a peristaltic motion robot like earthworm. As an actuator, we used the population muscles of the metal, which is a kind of a shape memory alloy, called BioMetal. BioMetal is a thin fiber-like metal actuator that acts like a muscle. Although soft and pliable like a nylon thread under normal conditions, it becomes stiff like a piano wire and sharply contracts when a current is fed through it. If the passage of current is stopped, it will soften and extend to its original length. However, its length variation is so small (4.5% of its total length) that we made expansion mechanisms like a pantograph. Finally, our robot realized a motion like earthworm by connecting units and controlling timing by the microcomputer.
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[in Japanese], [in Japanese]
Article type: Article
Session ID: 901
Published: September 18, 2005
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We performed air environmental measurement in the eastern part area in Tokyo. Investigators are people of various ages, such as a technical college student, an asthmatic, a lawyer, and a citizen, and an occupation. Consequently, it turned out that each area has a road situation by historical progress, and that situations differ, respectively has also understood atmospheric contamination deeply. This measure gave participants big encouragement. It became a good opportunity to have especially a machine system student experience an environmental problem.
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KIICHI YOSHIDA
Article type: Article
Session ID: 902
Published: September 18, 2005
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College of Technology in Japan were first established in 1962, to meet demands from industry. They were founded as a unique type of higher level education institution which could provide training for engineers under a system totally different from that of universities. College of Technology accept graduates of lower secondary schools and provide five years of consistent technical education. In this report, industry-college-Government cooperation of TMCAE in east Tokyo area.
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Toshikazu YAMAMOTO, Tomoaki IENAGA, Ryoya MAKINO
Article type: Article
Session ID: 903
Published: September 18, 2005
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The present situation of the robot contest in Technology education course of the junior high school was investigated. Three kind of rules(A,B,C) which are made by the teachers have been set. There is in many cases to the learning of them by the elective subjects of Technology education course though the teaching content and methods is various. As a problem point, it was indicated that there is for learning time, production costs, teaching content, evaluation method, etc..
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Hironobu YUKI, Shintaro SEKIKAWA
Article type: Article
Session ID: 904
Published: September 18, 2005
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Sketch drawing has been often incorporated into curricula for machine drawing since it is considered to be effective for training of a projection method. However, due to the limitation of educational environments, such as the number of instruments, classroom hours, etc., it is sometimes difficult to take enough time that each of students performs practice at one's own speed. For this reason, we have proposed a computer assisted instruction system which provides an e-Learning environment for exercises in sketch drawing. In this study, surface model that was shown on the computer display was used as an object for sketch. In order to emulate sketch works in the real world, dimensions of the object are measured by the similar approach which used a caliper. The prototype system was developed and the effectiveness of the method was discussed.
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Sohei SHIROSHITA
Article type: Article
Session ID: 905
Published: September 18, 2005
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The KARAKUKI-ZUI, a famous machine book of the Edo era, explains the mechanisms of KARAKURI dolls, and the main movements of KARAKURI are illustrated in it. However, it is not so easy to understand these diagrams because they are too partial. Since the explanation books of the mechanisms of today follow the diagrams of the KARAKURI-ZUI, the difficulty to understand has not changed. In this research, the movements of KARAKURI were reproduced with animations using the complete consecutive movements, and examined comparing with the Reuleaux educational mechanism models. These animations will be published on the web site and it is expected that many people, especially younger generation, can understand easily the principal movements of the KARAKURI.
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Yoshinori MORIMOTO, Shigeru SAITO, Takamitsu YOSHIMOTO
Article type: Article
Session ID: 906
Published: September 18, 2005
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Environmental Problem is important in the recycle system society. It is important to learn the education of environment and security in the technology education. The KEMS (Kobe Environmental Management System) has been established. The education system of the mechanical engineering department of KCCT is certificated as KEMS step 2, the level of which is nearly the same as ISO14000 (International organization for standardization is called ISO.). The methods of instructions and the effect of education through the training course are reported.
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Shigeru SAITO, Yoshinori MORIMOTO, Takamitsu YOSHIMOTO, Motoyasu OZAKI ...
Article type: Article
Session ID: 907
Published: September 18, 2005
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The Labor Standards Bureau permitted the gas welding technical institute as the specification education facility in September '99. The specification education facility has been exchanged to the registration facility. There are some changed procedures. We debate about the influences of them. It is important to learn the fundamental producing technology and operate it securely in the technology education. The lecture in which the education of security is included has given as the part of the school curriculum. The methods of instructions and the effect of education through the training course are reported.
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Eiichi OSAWA, Shuya KAMEI
Article type: Article
Session ID: 908
Published: September 18, 2005
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In the cooperation of the children through the regional education, the students play important parts as the assistants, teaching staffs, and preparation staffs in "monotukuri" education. Especially in the field of the chemistry, the students play leading parts in regional education. Because in chemistry fields, the many treating materials are liquids and often dangerous objects. The children treat these materials for the first time. Then it is necessary to raise the consciousness of the improvement to the students in daily experiments. In this paper, the case which tackles the improvement to the students through the adsorption experiment is introduced.
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Shuya KAMEI, Eiichi OSAWA, Seita ISSHIKI
Article type: Article
Session ID: 909
Published: September 18, 2005
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In order to clarify the case in the previous paper, the guidance has been carried out, while we contact the enjoyment of the make to children in the elementary school. At the result, it was proven we appeared the difference of the character in the activity condition of children. In this science experiment, children produce by the simple method for making the incense stick firework, and in addition, they try the combustion experiment, and they can view the phenomenon which beautifully flashes. At the end in one year, they arrange on a panel and show each presentation for all of the puple in the lobby of school.
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Teruko AOKI, Chihiro UMEKI, Hitomi KOGA, Naoya OKUMURA, Takuya SHIRAIS ...
Article type: Article
Session ID: 910
Published: September 18, 2005
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With the recent popularization of computer equipment, various kinds of information devices for the physically handicapped people as well as for the able-bodied have been developed so that even disabled people can access computer aided devices. However, researches of actual conditions as to what apparatuses these disabled people demand or wish to have rarely or never been reported as yet. Therefore, in this research, a fact-finding investigation concerning what devices and how the physically handicapped persons in some institutes of Oita Prefecture are or have been using information technology devices was conducted. The results of questionnaire-investigation were given feedback to those people concerned and their requirements were summarized. Based on the data, necessity of development of "Separate-Type Foot mouse" is proposed in this paper
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Sadamu FUJII, Syuji NAKA
Article type: Article
Session ID: 911
Published: September 18, 2005
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To inspire apathetic students about science and technology, training with moving model machines has been introduced into the curriculum for the students of beginners' classes. The effects have been seen in various aspects of the students' later technical education.
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Seiji UMEZU, Mitsuhiro IWAMOTO
Article type: Article
Session ID: 912
Published: September 18, 2005
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I have lectured "General theory of technique" in OITA College of Technology for about 25 years. And I volunteered activity of welfare, nursing and medicine for about 10 years. Making the most of my these trial and experience, "Proposal of improving instrument in nursing and medicine" was set to students for task. Lecture was composed as follow. At first, the outline of technique history was explained and "general laws for technique development" was emphasized. Next we investigated needs about instruments in welfare, nursing and medical fields using Questionnaire i. e. "KOMATTA MONO CHOUSA" to the hospital and welfare home for the aged. Basing on results, students made effort for invention to various 'NEEDS". Students presented their "Proposal of improving instrument" during in school hours and comment on them one another.
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Tatsuo WATANABE
Article type: Article
Session ID: 913
Published: September 18, 2005
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With the aim of the construction of the organization for activating the activity of the institute on the education., as a means for transversely grasping the activity in the institute, department activity results investigation.it was considered that it clarified the human who is active on the education relation of the department through the work and carries out the call to those humans, and that it contributes to the achievement of the purpose.The result of the investigation is reported.
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Tatsuo TAMAGAWA
Article type: Article
Session ID: 1001
Published: September 18, 2005
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There is a French strength of materials notebook by Tatsumi Hajime who learned at Yokosuka shipyard school. A teacher was French Dupont, and it was written down over 1876-1877 years. They are the precious materials which can known that contents of education in those days. It consists of 2 volumes of about each 200 pages. It is written in the first volume about tension, compression, bending and in the second volume about beam, moment of inertia and shearing etc.. They are fundamental items and an application exercise about the material and the element.
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Tadashi FUJIO
Article type: Article
Session ID: 1002
Published: September 18, 2005
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Tokyo University's mechanical engineering objects manufactured in the eady Meiji era are now displayed in the University Museum, the Koishikawa Annex.. This paper tries to make out the historical background of these objects, by making research on Kogakuryo, Kobudaigakko, Tokyokaiseigakko, and Tokyo University.
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Mitsunobu YOSHIDA, Yuji KUBOTA, Yasuhiro YOKOTA, Takehiro HATO, Takehi ...
Article type: Article
Session ID: 1003
Published: September 18, 2005
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Man-Nen Dokei was made by Hisashige Tanaka, who is a founder of Toshiba Corporation, at 1951. It has six multi-functional faces and is crowned with the celestial globe. A national project has been conducted to disassembled and restored in a national project. We have investigated on the mechanism of Man-Nen Dokei in cooperation with this project. The purpose of this paper was to investigate the mechanism and the design concept of the Wadokei, the Japanese traditional clock, which is the highlight of the Man-Nen Dokei. It has been clarified that the movement of "warigoma", square pieces indicating Japanese traditional time, is correspondent to the result from the real movement of the sun.
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Yasuhiro YOKOTA, Yuji KUBOTA, Mitsunobu YOSHIDA, Takehiro HATO, Takehi ...
Article type: Article
Session ID: 1004
Published: September 18, 2005
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Man-nen-dokei, which is a historic perpetual chronometer, was made by Hisashige TANAKA at 1851. It is said that Man-nen Dokei is one of best works in "wa-dokei", Japanese traditional clock. Recently, it has been disassembled and restored in a national project, so we investigated the mechanism of the Man-nen-dokei in cooperation with the project. This paper shows the mechanism of the celestial globe at the top face of Man-nen-dokei. Especially, we focus on (1) the mechanism for simulating the motion of the sun and the moon throughout the year, (2) the relationship between the definition of "mutsu" and the "shinkon-sai" in the celestial globe.
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Takehiro HATO, Yuji KUBOTA, Mitsunobu YOSHIDA, Yasuhiro YOKOTA, Yoichi ...
Article type: Article
Session ID: 1005
Published: September 18, 2005
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Man-Nen Dokei, which is a historic perpetual chronometer, was made by Hisashige Tanaka, who founded the predecessor of Toshiba Corporation, at 1951. It has six multi-functional clock faces and a celestial globe. It is said that it runs for almost a year with just a single winding. Man-Nen Dokei was disassembled and restored in a national project. We have investigated on the mechanism of Man-Nen Dokei in cooperation with this project. In this paper, we report on the mechanism of the power supply. As a result, the structure of the power supply was clarified, and from the mechanism composition, it has been understood that the maximum continuous operating days are about 225 days and the fusee composition had not been optimized for the power supply.
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Keiji ITOH, Hiroaki ZUSHI, Hideichi NAKAMOTO
Article type: Article
Session ID: 1006
Published: September 18, 2005
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This paper discusses the importance of engineering education for students through restoration of "Kunst Fontein" written in the ancient document named "Itto-shikyuroku" by Benkichi Ohno (1801-1870). Recently, young people who are interested in engineering and mathematics are diminishing because there are a few workshops which give opportunities to learn engineering. Then we remarked the simple mechanism of "Kunst Fontein", developed assembly kit using PET (polyethylene terephthalate resin) bottle and use it in our workshops. For better fountain performance, we demonstrate the relationship between height of fountain and each conditions i.e., diameter of tubes, shape of a nozzle, by hydrodynamic analysis and experiments.
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Kenkichi SATO, Mari MATSUURA, Yasuyuki SHIRAI
Article type: Article
Session ID: 1007
Published: September 18, 2005
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In this paper, the authors report on Brunei's Atmospheric Railway (BAR), this was organized by Isambard Kingdom Brunei (1806-1859), through field works in England. After a field investigation at Starcross where was installed a pumping house as the BAR's steam power station, historical materials of BAR's pipe were investigated at three railway museums: Didcot Railway Centre has preserved and displayed the original 22in-diameter pipes of the BAR. Both STEAM (Museum of the Great Western Railway, Swindon) and NRM (National Railway Museum, York) have replicas of the BAR's pipe and give information about details of the BAR's system. Through on-the-site investigations, the authors could collect a lot of valuable references and materials for making a replica of the BAR.
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Keisuke YOSHIDA, Isei MATSUZAKI, Eiichi Murase
Article type: Article
Session ID: 1008
Published: September 18, 2005
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Performance of the 'Gas Engine' invented by Mark Isamabard Brunei (MIB), who was a one of the most famous British engineers and also a father of Isamabard Kingdom Brunei (IKB), is discussed by researching the document of specifications of the patent, which was applied for in 1825. After the outline and working principle of the engine are shown from the information of the document of specifications, the reason why the engine could not work in practice is shown as the result of the discussion with today's knowledge under some assumptions. It is concluded that the main reason was that the temperature difference between the high temperature heat source (hot water) and the low temperature heat source (cold water) was too small to drive such a heat engine, from thermodynamics and thermal engineering points of view.
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Masanori OGATA, Yorikazu SHIMOTSUMA
Article type: Article
Session ID: 1009
Published: September 18, 2005
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In this paper, ruts of ancient Roman chariot in the ruins of Leptis Magna is investigated. Leptis Magna was famous for Roman city called as "The Peal of the Mediterranean Sea" in the Roman era. There are many Roman monuments. Chariot's gauges are discovered, and the measured values are nearly equal to the present international standard gauge of railway.
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Yasumi OZAWA, Kiyoo TACHI
Article type: Article
Session ID: 1010
Published: September 18, 2005
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As a part of the present investigation has already been reported in the former information, there are a number of unclarified points regarding use of the Y-type lumbers of the excavations in Sakuramachi-Site (Oyabe City, Toyama). On the assumption that the Y-type lumbers can be used as sledges, the positioning of Y-type lumbers in the history of tribology is discussed in this paper.
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Tokuro NAGAI, Takehiro AMANO, Hidehiro OKAMOTO, Ryuki YAMASITA, Uzuhik ...
Article type: Article
Session ID: 1011
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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Field Investigation of Rotational Mechanism of Revolving Bookshelf within Buddhist Sutra Storehouse of Kenchuji Temple (continued report) A report on the results of rotational measurements, investigation of rotational resistance, etc. concerning the revolving bookshelf (rinzo) of the Kenchuji Temple (Nagoya) was presented at the 2004 conference, but measurements and investigations were carried out once again following the restoration of this revolving bookshelf. A comparison of results prior to the restoration, as previously reported, and measurement results and other data after the restoration (before and after placing sutras back on the bookshelf) has been carried out. This paper will report on the results of such comparison and present observations.
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Uzuhiko TSUBOI, Masahiro NISHITSUNOI, Teruo YOSHIDA
Article type: Article
Session ID: 1012
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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Following the investigation on the rotational mechanisms of the revolving stages of the Kanemaru-za theater in Kompira, the Kureha-za theater in Meijimura and the Yachiyo-za theater in Yamaga-shi of Kumamoto Prefecture, an investigation was carried out regarding the rotational mechanism of the Kamimikawa theater revolving stage in Nanko-cho of the Sayo-gun district of Hyogo Prefecture. Even more than the revolving stages of the other three theaters, the revolving stage of the Kamimikawa theater has unique mechanisms in rotational stability, loading, force transmission, etc. This revolving stage's special features and measurement results of rotational torque and friction coefficient are reported from the tribological viewpoint.
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Takehiro AMANO, Tokuro NAGAI
Article type: Article
Session ID: 1013
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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This is an investigation report on the water turbine used in Kamogawa-cho, Toyota-city in Aichi Prefecture. This water turbine once supplied power to the braking machines, which unravel old cotton clothes and turn them into cotton fibers for recycling. Recycled fibers were used as a material for Garabo Spinning. There were a lot of Garabo Spinning factories including Ohara Factory along the Gunkai River. There are few factories which remain the water turbine now.
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Ichiro TSUTSUMI
Article type: Article
Session ID: 1014
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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An English-made No.123 old steam engine was designated the Japanese Natural Important Cultural Properties in June 2005. This old steam engine that was made in 1873 at the Robert Stephenson & Co., Newcastle upon Tyne is now preserving at the Kaya Steam Locomotive Plaza, in the Kyoto Prefecture. It is the oldest and famous locomotive builder in the world. In 1843, this famous builder invented well-known "Stephenson type valve gear system" and this system contributed to the modern other valve gear design method. This No.123 steam engine was mainly used in the Kyoto-Kobe railway transportation business of the I.G.R.J., in those days of the Meiji Era. In this report, a short history of the No.123 steam engine and its historical significance of industrial technology are described.
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Takanori Iizuka, Satoyuki KAWANO, Satoru YAMAMOTO
Article type: Article
Session ID: 1101
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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We analyzed poly(dA)・poly(dT) DNA molecular flow and adhesion process on two kind of inorganic substrates; mica and HOPG, by molecular dynamics simulation and an atomic force microscopy. It is clarified that Na^+ ions have important role to immobilize DNA on a SiO_2 substrate. A HOPG substrate however has weak interaction to DNA, and DNA does not anchor on a HOPG substrate in solution. We indicated that sticky ends of DNA are generated on both substrate, and are able to extend DNA chains. It is expected that the DNA chain form a well-known network structure with such a process.
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Youhei MARUYAMA, Satoyuki KAWANO
Article type: Article
Session ID: 1102
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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In this work, the charge transport in deoxyribonucleic acid (DNA) is theoretically analyzed. We develop an novel mathematical model based on the polaron model by Komineas et al.. We improve the model for considering the effect of bulk temperature. In order to conserve the norm of the wave function, the numerical code based on implicit Successive Over Relaxation (SOR) scheme is developed for solving time-dependent Schrodinger equation. The equations of motions of DNA base pairs and the bulk molecules are also efficiently solved simultaneously. It is found that the mean velocity of the polaron in DNA becomes faster as bulk temperature. Furthermore, detailed systematical study for various parameters in the model is made by the use of the code developed here. Consequently, we can accumulate the basic understanding of charge transport phenomena in DNA.
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Akira SUZUKI, Takuji KOIKE, Kyoji HOMMA, Sayuri MURAKAMI
Article type: Article
Session ID: 1103
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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When a bone is vibrated by a vibrator, we can perceive a sound even if conductive hearing loss exists. The applied vibrationis supposed to be transmitted to the cochlea through the temporal bone, and this sound path is called bone-conduction. However, the real sound paths of the vibration applied to the bone have not been clarified. In this study, the subjective sound pressure perceived by subjects and the sound pressure generated in the external auditory meatus (EAM) were measured when the zygomatic process of temporal bone was vibrated by a piezoelectric vibrator. The level of sound pressure in EAM was nearly equal to the subjective sound pressure level at 1kHz. This result suggests that subjects with normal middle ear perceive not only bone-conducted sound but also air-conducted sound through the middle ear when the zygomatic process was vibrated at 1kHz.
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Masaki SHINOZAKI, Takuji KOIKE, Kyoji HOMMA, Sayuri MURAKAMI, Hiroshi ...
Article type: Article
Session ID: 1104
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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In this study, an apparatus that quasi-statically measures the relationship between the load applied to the ossicles and the displacement of the ossicles was developed, and the ossicular mobility in human temporal bones was measured before and after the ossicles were artificially fixed. Results were compared with estimates of vibration amplitude of the ossicles obtained with a laser Doppler velocimeter in the same temporal bones when sound stimulus was applied to the tympanic membrane. When the fixed bone was measured with our apparatus, a correlation was seen between the ossicular mobility measured with our apparatus and the vibration amplitude of the ossicles. This result suggests that our apparatus is able to detect the difference in mobility between fixed and normal ears, and indicates that our apparatus is a potentially useful tool for the estimation of ossicular disorders.
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Akihiro SOETA, Takuji KOIKE, Kyoji HOMMA, Sayuri MURAKAMI, Hitosi WADA
Article type: Article
Session ID: 1105
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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In this study, minimally invasive electromagnetic hearing aids (EMHA) which directly vibrate both the stapes and the round window were proposed, and a prototype of the EMHA was constructed. The EMHA consists of vibration coils, a chamber, and a magnet. To estimate the power of the EMHA, an artificial stapes-cochlea model was made, and the vibration of the stapes head of the model generated by the EMHA was measured. The results suggested that the EMHA generated an excitation force of 90dB SPL in terms of sound pressure in the wide frequency range of 250-10,000Hz.
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Hitoshi ISHIDA, Toshio SATO, Kiichi TSUJI, Norimichi KAWASHIMA, Tetuzo ...
Article type: Article
Session ID: 1106
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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Visualization and numerical analysis of the flow in a hollow fiber type hemodialyzer were conducted to investigate the channeling phenomenon in which the blood flow deviates from normal behavior. Dialysate flow is perturbed by baffle to make the function of dialyzer ineffective. Dialysate flow was visualized with a Particle Image Velocimeter (PIV) after the baffle structure was mechanically changed. The dialysate and blood flow were numerically analyzed using a Finite Element Method (FEM). As a result, we could propose an effective configuration of dialyzer that has advantages in both traditional and improved types.
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Makoto OHTA, Naoko FUJIMURA, Hiroo IWATA, Sadami TSUTSUMI, Daniel A. R ...
Article type: Article
Session ID: 1107
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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Image guided minimally invasive treatments for cerebral aneurysms have been popular for last decade. The implantation such as coil or stent reduces the flow in the cavity and the cinematic angiography (CA) has a potentiality for measuring the flow speed during a treatment. In this paper, we applied the CA with 25f/s to a real cerebral aneurysm to take successive images and measured the flow speed in the cavity. Two usual angles of Posteroanterior (PA) and Lateral (LA) projections were selected and images are taken simultaneously. The condition of CA was 60kV and 300mA. The left-convolution flow was observed form the viewpoint of PA and around 50mm/s. The inflow from the parent artery was rotated with the counterclockwise in the aneurysm. The speed of inflow was 359mm/s and reduced in the cavity. The CA is possible to measure the flow speed in aneurysm.
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Kenichi FUNAMOTO, Toshiyuki HAYASE, Yoshifumi SAIJO, Tomoyuki YAMBE
Article type: Article
Session ID: 1108
Published: September 18, 2005
Released on J-STAGE: August 01, 2017
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Hemodynamics plays an important role in the development, progress and rupture of aneurysms, and therefore, is essential for advanced diagnosis. However, existing methodologies have yet to provide detailed and accurate information of blood flow field due to their individual limitations. As a solution to the problem, we have proposed Ultrasonic-Measurement-Integrated (UMI) simulation. In this method, feedback signals derived from the difference between measured Doppler velocity and the calculated one by numerical simulation are fed back to the numerical simulation. In this paper, we validate the efficacy of three-dimensional UMI simulation by the numerical analysis with various irradiation methods of ultrasonic beam. As the result, UMI simulation improves computational accuracy and enables us to obtain more accurate information of blood flow field including wall shear stress.
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