可視化情報学会誌
Online ISSN : 1884-037X
Print ISSN : 0916-4731
ISSN-L : 0916-4731
26 巻, Supplement1 号
選択された号の論文の117件中1~50を表示しています
  • 水野 明哲
    2006 年 26 巻 Supplement1 号 p. 1
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
  • 吉澤 晋, 金子 幸生, 藤原 暁子, 松本 洋一郎
    2006 年 26 巻 Supplement1 号 p. 5-8
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Ultrasonic medical applications such as ultrasound contrast agent imaging, High Intensity Focused Ultrasound (HIFU) and Extracorporeal Shock Wave Lithotripsy (ESWL) have recently been the subject of much interest. In these applications, micro-bubbles facilitate the medical treatment by improving the image quality or enhancing the therapeutic effects through localized heating or acoustic emission. In order to treat a diseased part properly and safely, simultaneous diagnosis with therapy is necessary. The objective of this study is the establishment of the integrative system of ultrasound diagnostic and minimally invasive therapy. HIFU treatment of the ultrasound heating and lithotripsy with simultaneous diagnosis by an ultrasound diagnostic equipment are introduced.
  • 50年の現場経験・エピソード
    関 晴夫
    2006 年 26 巻 Supplement1 号 p. 9-12
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Some episodes from the making of science films are presented. The topics include, ultra-violet cinematography for Japanese cabbage butterflies in the open air with sexual difference in wing's capability of reflecting UV rays, high-speed cinematography for the crown-shaped splash of a falling drop of milk, and time-lapse cinematography for the blossoming of a flower.
  • 清水 浩, 江本 聞夫, 河上 清源
    2006 年 26 巻 Supplement1 号 p. 13-19
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    A new electric vehicle named Eliica was developed. As element technologies, a lithium-ion battery, permanent magnet type motor, and inverter with IGBT were applied. As new body component technologies, in-wheel motors, a component built-in frame, and tandem wheel suspension were invented.Although the Ehica is a five-passenger sedan, it recorded a maximum vehicle speed of 370km/h and an acceleration time of 7.0 seconds from zero to 160km/h.
  • ノナカ ジョルジ, 渡場 康弘, 安原 幸生, 坂本 尚久, 小山田 耕二
    2006 年 26 巻 Supplement1 号 p. 21-22
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Volume data has been increasingly used in a wide range of applications in science and engineering. Advance in computer as well as in digital measuring technology have greatly increased the size and complexity of volume data. This sharp growth in data size is overwhelming the limit of the storing and processing capacity of traditional computer systems, and therefore an efficient data compression method is required. Considering this necessity, we have focused on a lossy compression method based on Kriging interpolation and extrema points. The compressed data will be composed of the extrema points, used as key points for data restoring, and three parameter values obtained from the entire data. Therefore, a great reduction in data size can be achieved. However, the parameter values and the starting points should be carefully selected in order to obtain good results. In this report, we present some results obtained from the KVS-based kriging compressor and discuss the potentials and problems of this proposed method.
  • 渡場 康弘, 酒井 晃二, 小山田 耕二, 金澤 正憲
    2006 年 26 巻 Supplement1 号 p. 23-24
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Nowadays, many large volume data sets have been generated from numerical simulations and digital measurements in various fields. Advances in computer and measurement device technologies have enabled their use in large-scale numerical simulations and high-resolution digital measurements, thus generating volume data which is continuously increasing in size and complexity. As a result, an efficient technique for a classification of and searching for these data sets is highly desired. Then, we developed the retrieval method that used critical point graph (CPG) as an index that compactly expressed the feature of the volume data. However, an enough examination was not done whether to approve the relation of one to one between CPG and original volume data. In this paper, we investigate whether another volume data that generates the same graph as CPG created from a certain voxel data with the scalar value of 1 byte exists, and examine the validity of CPG as the index for the retrieval.
  • 酒井 晃二, 南 智規, 小山田 耕二
    2006 年 26 巻 Supplement1 号 p. 25-28
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Traditional classifying and searching systems have required special features of data from manual input. To overcome this undesirable task, a method which automatically creates and utilizes a "Critical Point Graph (CPG)" as an index of volume data has been proposed. In order to achieve suitable search and classification results, it is required to automatically calculate similarity between CPGs from a set of selected volume data. We introduce a new feature-matching algorithm to make an exact correspondence of positions between two CPGs. This is an extension of "Triangular Matching Algorithm" which is usually employed in the field of 2D fingerprint matching. In order to evaluate the effectiveness, we evaluated the influence of data resolution and arrangement in our proposed CPG based method. We confirmed the effectiveness and usefulness of our proposed CPG based method when applied to numerically constructed weather volume data sets. From computational experiments, our new CPG method has shown suitable ability for similarity calculation between two dissimilar volume data.
  • 鈴木 靖子, 村木 茂, 藤代 一成, 竹島 由里子
    2006 年 26 巻 Supplement1 号 p. 29-30
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    In this paper, we present a new visualization method, called diffusion based tractography (DBT), for diffusion tensor magnetic resonance imaging (DT-MRI). The DBT method generates 3D textures similar to the line integral convolution (LIC) by smearing 3D random dot textures. In contrast to LIC, which only traces a single direction, DBT takes into account both linear and planar diffusion components and suppresses excessive blur due to spherical diffusion, by an analysis of the diffusion tensor components. We will demonstrate that DBT is effective for visualizing dense white matter connectivity to be found in human brain.
  • 竹島 由里子, 藤代 一成
    2006 年 26 巻 Supplement1 号 p. 31-34
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Scientific visualization is widely used for the analysis of datasets obtained from measurements and numerical simulations. However, scientists and engineers are not always visualization experts who are familiar with how to map their numerical data to proper graphical primitives to yield optimal visualization. Therefore, we have built on modular visualization environments (MVEs) to develop a design support system, called GADGET, for scientific visualization applications. In this paper, we attempt to reexamine specifications for design directives to make the GADGET system tailored to visual flow data mining.
  • 大規模データ処理能力が飛躍的に向上した新バージョン
    田澤 司, 中園 美香
    2006 年 26 巻 Supplement1 号 p. 35-38
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    S-PLUS is data analysis software based on S-language developed by Bell Lab. Version 7, the latest version of S-PLUS, provides big data library to handle large scale data. It is useful for statistical modeling, visualization, and data mining of large scale data.
  • 小野 謙二, 宮地 英生
    2006 年 26 巻 Supplement1 号 p. 39
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    This panel discussion intends to find hints for a visualization system of the next generation. The Panelists are invited from major research centers that are performing large-scale simulation and visualization. The computer hardware is upgrading its performance every quarter and enables us to calculate more large-scale grid points as we can find in the TOP500 list. On the other hand, a few visualization system can currently deal with the huge amount of data that is generated by tera-scale computing. In addition, since the almost large-scale computation will be conducted on distributed parallel environment, the visualization system will be so much more complicated.
    Open discussion will be expected to share issues and to derive useful knowledge for the visualization system of the next generation.
  • 姫野 龍太郎
    2006 年 26 巻 Supplement1 号 p. 41
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    The next generation supercomputer R & D project started from January, 2006. The Supercomputer will start operation in April, 2011 and will be enhanced its performance during F.Y.2011. It is currently on the progress of design work and its effective performance is planed as > 1.0 Peta FLOPS. As the Earth simulator, this supercomputer will be fastest and larges in Japan and it will be very difficult for other supercomputer to process and visualize the computed results on it. Therefore, we are planning to have an attached visualization system.
  • Hiroshi OKUDA, CHEN Li
    2006 年 26 巻 Supplement1 号 p. 43-46
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    We have developed a general-purpose and high performance parallel visualization library in the HEC-MW project. Three parallel frameworks are provided in our library to satisfy different requirements of applications including a concurrent-in-memory style for extremely large data size, a concurrent-in-time (MxN) style for computational steering and Grid environment, and a server-client style for interactive visualization. Meanwhile, it can support most typical grid types widely used in numerical simulations including regular grids for FDM (Finite Difference Method), particles for DEM (Discrete Element Method), and unstructured grids for FEM (Finite Element Method). Moreover, high speedup performance has been achieved by some hardware-oriented optimization strategies. Different algorithms, data structures and parallelization techniques were adopted for different platforms from PC-clusters to the Earth Simulator. Good visualization images and high speedup performance have been achieved for some applications with different grid types on typical parallel platforms, thus demonstrating the feasibility and effectiveness of our library.
    1) http://www.rss21.iis.u-tokyo.ac.jp/
    2) Earth Simulator Research and Development Center web site http://www.es.jamstec.go.jp/
    3) http://www.kgt.co.jp/
    4) Lacroute, P. and Levoy, M.: Fast Volume Rendering Using a Shear-Warp Factorization of the Viewing Transformation, ACM SIGGRAPH 94 Proceedings (1994) pp. 451-457.
    5) Sano, K., Kitajima, H., et al..: Parallel Pocessing of the Shear-Warp Factorization with the Binary-swap Method on a Distributed-memory Multiprocessor System, Proceedings of the IEEE symposium on Parallel rendering, Phoenix, United States (1997) pp.78-94.
    6) Chen, L., Fujsihiro, I., et al.: Detail-Preserving Resampling for Parallel Volume Rendering Large Unstructured Data on Earth Simulator, Proceedings of The 7th IASTED Conference on Computer Graphics and Imaging, Hawaii (2004) pp. 242-247
    7) Lorensen, W. E. and Cline, H. E.: Marching Cubes: A High Resolution 3D Surface Construction Algorithm, ACM Comp. Graph, Vol.21, No.4 (1987) pp. 163-169.
  • 荒木 文明, 上原 均, 大野 暢亮, 川原 慎太郎, 陰山 聡
    2006 年 26 巻 Supplement1 号 p. 47-48
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Two kinds of visualization software, MovieMaker and VFIVE, developed at Earth Simulator Center are introduced. MovieMaker is a parallel rendering software for making sequential images from large scale simulation data. VFIVE is a virtual reality visualization software for interactive and immersive visualization in the CAVE system.
  • 鈴木 喜雄, 松本 伸子, 井戸村 泰宏, 谷 正之
    2006 年 26 巻 Supplement1 号 p. 49-52
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    An innovative scientific visualization system is needed to integratedly visualize large amount of data which are distributedly generated in remote locations as a result of a large-scale numerical simulation using a grid environment. One of the important functions in such a visualization system is a parallel visualization which enables to visualize data using multiple CPUs of a supercomputer. The other is a distributed visualization which enables to execute visualization processes using a local client computer and remote computers. We have developed a toolkit including these functions in cooperation with the commercial visualization software AVS/Express, called Parallel Support Toolkit (PST). PST can execute visualization processes with three kinds of parallelism (data parallelism, task parallelism and pipeline parallelism) using local and remote computers. We have evaluated PST for large amount of data generated by a nuclear fusion simulation. Here, two supercomputers Altix3700Bx2 and Prism installed in JAEA are used. From the evaluation, it can be seen that PST has a potential to efficiently visualize large amount of data in a grid environment.
  • 矢崎 佑介, 望月 修
    2006 年 26 巻 Supplement1 号 p. 53-54
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Most of the reasons for stains in the open air are rain water that contains iron powder and fugitive dust. To keep clean the surface, it will be important that rain water does not stay on the surfaces for long time. In the first stage of this study, we researched the definition of stain on the metal surface of a car. In the next stage, we researched how important to keep clean the surfaces when the surfaces have different characters such as hydrophilic, and water-repellent surface. We focused on the beetle's surfaces which are well known as water-repellent surface, the surface structures and water contact angle which are necessary for water-repellent to avoid stains.
  • 川崎 真弘, 染矢 聡, 岡本 孝司
    2006 年 26 巻 Supplement1 号 p. 55-56
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Public Outreach (PO) is the bidirectional communication between researchers and the public, and especially in the field of technology affecting society it is essential. However, the existing PO is only disclosure of information in web page and symposium but the mutual understanding is insufficient. The aim of this research is to develop the web system which provides the best suited information depending on the users, and to mine the data of what they are interested in from the access log data.
  • 坪内 俊一, 岡本 孝司
    2006 年 26 巻 Supplement1 号 p. 57-58
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    This paper reports development of new kind of 3D interactive interface. We develop "3D-URL history viewer" by using Web3D, Viewpoint. Features of "3D-URL history viewer" are following points. (1) Displaying preview images of sites in 3D. (2) Size and position of images are decided according to access log. (3) This system can also display URL in list. (4)Images are enlarged by positioning the mouse pointer over the images. In this research, this system works well when it visualizes about 100 files on notebook-size PC running at 1GHz. As a result, effective displaying of preview images in 3D becomes possible, and usability is improved by arranging objects according to access log.
  • 浅倉 正芳, 染矢 聡, 岡本 孝司
    2006 年 26 巻 Supplement1 号 p. 59-60
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    It is very useful to visualize chemical properties because some molecules have complex structures. Recently computer graphics has played an important role in molecular modeling. This paper presents a visualization system using Java3D which shows the result of chemical simulation. This system can display some molecular models and the result of optimized calculation and molecular dynamics. We can see molecular models from different points of view interactively. In addition, this achieves collaboration between database, calculation code and rendering. Chemical calculation program works on a server machine. So, this system can be used from anywhere on the internet and allows for calculation data sharing. Such system can be applied for the design of materials or medicine, and education of chemistry.
  • 吉田 一誠, 岡永 博夫, 青木 克巳
    2006 年 26 巻 Supplement1 号 p. 61-64
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    This paper describes an experimental study on the flow patterns and the characteristic of flow around a circular cylinder with grooves. The surface pressure when changing Reynolds number (Re=0.4×105-4.2×105) measured with the circular cylinder with grooves of four kinds of grooves number (32, 48, 64, 96) Drag coefficient is calculated from the pressure distribution and the flow around the circular cylinder with grooves is investigated by hot wire and visualization. From the results, It is clarified that minimum drag coefficient shifts to high Reynolds number side as groove number increases. It turns out that wake area, separation point change and the drag coefficient is affected with the number of grooves.
  • 小仁所 匠, 川瀬 智也, 渡邊 拓也, 上野 一郎
    2006 年 26 巻 Supplement1 号 p. 65-68
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Wetting and dewetting of the solid material by the liquid are focused. They can be observed in many natural phenomena and technological applications; such as falling rain droplet on the window, boiling, thin film coating, and crystal growth. These processes are accompanied with the movement of the boundary line of three phases; solid-liquid-gas interface, which is so-called macroscopic 'contact line'. The authors focus on the dynamics of the droplet traveling on the solid substrate accompanying with 'precursor film' ahead the contact line of the droplet. The precursor film was detected by applying conventional ellipsometer, and its existing length was evaluated as a function of a dimensionless Capillary number. The authors also indicate the effect of tiny particle sitting on the solid surface upon the traveling droplet and precursor film dynamics.
  • 小出 昌和, 岡永 博夫, 青木 克巳
    2006 年 26 巻 Supplement1 号 p. 69-72
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    The purpose of this study is to make clear the physical mechanism of the drag reduction of square cylinders. Besides, we focus on the depth of grooves. Experimental investigations on the flow around square cylinders were carried out in the range of 4.5×104??Re??5.5×104. The flow was visualized by the spark-tracing method. From these results it becomes clear that drag coefficients become low about 2.0% from the square cylinder in the case of the 7.5% depth of grooves. Moreover, we were able to identify the compound effect by corner-cuts and grooves. In contrast, in the case of the 2.5% and 5.0% depth, drag coefficients were not changed.
  • 西田 正浩, 折田 豊樹, 木暮 尚登, 山根 隆志
    2006 年 26 巻 Supplement1 号 p. 73-76
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    The motion of particles image was calculated using 4-time particle tracking velocimetry with translating from the trigger signal generated from the periodic flow drive unit to the 4 uniform interval trigger signal and the video camera controlled by the trigger signal to visualize the periodic flow near the wall. With this method, the velocity and shearing velocity profiles in the high shear flow near the volute casing wall of the rotary pump whose velocity and shearing velocity were respectively 0.5 meter per second and 1, 000 inverse second could be calculated accurately with the space resolution of 24 micro meter.
  • 吉田 哲雄, 岡永 博夫, 青木 克巳
    2006 年 26 巻 Supplement1 号 p. 77-80
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    This paper describes the flow characteristics of the structure of stenosis tubes with pulsating flow. Stenosis in blood vessels causes the separation and the stagnation of the flow, and are present in the normal bloodstream. Furthermore, blood vessel stenosis contains a fluid mechanics factor, since it is closely related to the flow via the generation of shapes, such as the divergence points and the curved parts. In the present study, investigated disorders of the flow in the flow by examining the flow characteristics of strictures which have hardly been examined to date. In this research, the flow by PIV was made visible to clarify the formation mechanism of blood vessel stenosis, and a detailed numerical analysis of the relationship between the flow characteristics and the shape changes was carried out.
  • 促進板設置間隔の影響
    山内 孝太, 福原 稔, 片野田 洋, 飯野 直子, 亀田 昭雄
    2006 年 26 巻 Supplement1 号 p. 81-82
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    In the hydraulic transportation of lquid-solid flow in the conduit, to transport the particles that had piled up, the discharging plates were proposed by the author. In this paper, the installation interval of the plates was changed and the flow of the particles was examined by the flow visualization. As a result, it was found that the optimum installation interval of the plates exists, a downward jet flow influences the transportation of the particles when the interval of the plates is too wide and the jet flow in the direction of the flow influences when it is too narrow.
  • 管径比の影響
    大牟礼 智弘, 福原 稔, 加藤 隆樹, 片野田 洋, 飯野 直子, 亀田 昭雄
    2006 年 26 巻 Supplement1 号 p. 83-84
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    In the pneumatic transportation, it was proposed by the authors that the effective and stable feeding of the particles can be attained by mounting the injection flow at the center of the suction nozzle. In this paper, we examined the influence of pipe diameter ratio on the nozzle performance. As a result, it was found that the optimum pipe diameter ratio exists. The various particles movement from different pipe diameter ratio was clarified by the flow visualization near
    the suction nozzle.
  • 横野 泰之, ビスワス デバシス
    2006 年 26 巻 Supplement1 号 p. 85-86
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    This paper describes extensive computer-based analytical studies on the details of unsteady flow behavior around the airfoils subjected flow induced vibration. A comparison was made between the two- and three-dimensional analyses for flow around a NACA0012 airfoil, and the separation vortex structure was examined in detail. From the numerical results, it was found that the separation vortex consisted of large-scale rolls with axes in the span direction, and rib substructures with axes in the stream direction. The three-dimensional analysis could simulate these rolls and ribs, but the two-dimensional analysis was inadequate to examine this vortex structure.
  • 荒木 文明, 島 伸一郎, 川原 慎太郎, 草野 完也
    2006 年 26 巻 Supplement1 号 p. 87-90
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    The method of precisely simulating a cloud microphysical process in a comparatively reasonable calculation cost has been developed by introducing the new concept that is called a super-droplet. Currently, the multi-physics simulations of the cumulus cloud formation and the rainfall have been tested, by coupling the super-droplet method with the macro-scale non-hydrostatic atmospheric model. Several characteristics of each water droplet, such as the positions in the atmosphere, the numbers of water droplets at those positions and the radii, are derived precisely in the simulation using super-droplet method.
    Several visualizations also have been tried for analyzing the data of this simulation. In the present paper, visualization of light transport in the cumulus cloud and around it is discussed by focusing optical characteristics of the water droplets which have been obtained by the multi-physics coupled cloud simulation.
  • 山岸 陽一, 沖 真
    2006 年 26 巻 Supplement1 号 p. 91-94
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    In the case of a cylinder in uniform flow, a sudden decrease in the drag force occurs at a high Reynolds number, but it is known that the same phenomenon occurs at a lower Reynolds number in the case where there exist grooves or roughness on the cylinder surface. Such a drag reduction phenomenon can be applied to a vessel, an airplane, an electricity line, etc. for improving energy efficiency, or reducing the wind load. The purpose of this study is to investigate the mechanism underlying the flow of some kinds of cylinders with grooves of arc, triangular and curved sectional shape in the vertical direction. From these results, it was found that the separation point of the circular cylinder with grooves of curved sectional shape shifts to the most downstream side and the drag coefficient becomes the smallest.
  • 伊澤 正貴, 村山 真彦, 三神 史彦, 西川 進榮
    2006 年 26 巻 Supplement1 号 p. 95-98
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    A photochromic method for micro flow visualization has been developed to measure flow fields in micron-scale fluidic devices. The system utilizes the reconstructed images by computer-generated holograms with a UV laser to produce dye streaks in the flow of fluids. Two-dimensional flows in Hele-Shaw cells, such as the flows through a micron-scale aperture and the flow induced by a source and a sink inside a circular micro region, are visualized by using the streak lines generated by a reconstructed image with suitable circle dot patterns. The dotted circle enclosing a source is found to produce useful streak lines for visualization of source and sink flows. The corresponding potential flows are obtained which agree well in flow patterns with the experimental results.
  • 大石 諒太郎, 望月 修
    2006 年 26 巻 Supplement1 号 p. 99-100
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    A flow around a brine shrimp as an animal plankton was investigated by using the PIV measurement. The brine shrimp moves by beating its arms. This is one of typical ways to obtain thrust and control for a direction of motion in the low Reynolds number circumstances. We found that a vortex pair moving with arms appeared during downstroke motion. The center of the vortex located on a middle of the arm when the brine shrimp moved forward. The other vortex pair formed at the end of upstroke motion. The scale of the latter vortex was smaller than the former vortex.
  • 加藤 裕之, 樋口 博, 澤田 秀夫, 国益 徹也, 橋本 拓郎
    2006 年 26 巻 Supplement1 号 p. 101-104
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Flowfield over and behind a circular cylinder in axial air stream was examined experimentally. To avoid disturbances from the model support, the JAXA 60cm magnetic suspension and balance system was utilized. The Particle Image Velocimetry (PIV) incorporated for velocity field measurement without interference from the model support was utilized in conjunction with the magnetically suspended model. Two PIV settings were applied in this measurement. In one setting, the laser light sheet was located perpendicular to the free stream. In another setting, the laser light sheet was located parallel to the free stream. The diameter of the model was fixed at 110mm and two length were chosen to provide L/D=1.31 and 1.68. Mean velocity and turbulence intensity distributions measured using the PIV were symmetric with respect to the center of the model. Unsteady large-scale longitudinal vortical structures were observed in the entire wake.
  • 冨川 昌義, 中村 瑞木, 荻巣 宏幸, 飯田 明由
    2006 年 26 巻 Supplement1 号 p. 105-108
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    The purpose of this research is to clarify the generation mechanism of aerodynamic lifting force of a flying insect. For this purpose, aerodynamic force and flow field were measured with a micro load-cell system and dynamic PIV system. As a result, negative pressure caused by leading-edge vortices makes large lifting-force in the downstroke process. Although the leading-edge vortices can be observed even in the case of upstroke process, lifting-force was not generated. Because of the distance between the vorticity core and wing was larger than that of the downstroke process. Therefore, the distance between the core and wing plays an important role with aerodynamic force generation.
  • 中島 耕司, 藤澤 延行
    2006 年 26 巻 Supplement1 号 p. 109-110
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    The three-dimensional temperature measurement was carried out using the background oriented schlieren method in combination with the tomographic image reconstruction technique. This technique allows a non-invasive optical measurement without any tracers, and is applied for the temperature measurement in a laminar buoyant plume in still water surroundings. The measured temperature distribution shows a top hat profile, which is in rough agreement with the thermocouple measurement.
  • 橋爪 勇嗣, 渡辺 将生, 藤澤 延行
    2006 年 26 巻 Supplement1 号 p. 111-114
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    The mean and turbulent statistics of heat and momentum transfer in Rayleigh Benard convection were evaluated from the simultaneous measurement of temperature and velocity field using the liquid crystal thermometry and velocimetry with temperature-sensitive liquid-crystal-particles. The experiments were conducted at Rayleigh number 4x107 in the turbulent regime. The balances of turbulent energy and temperature fluctuation were estimated from the measurement. It is found that the turbulent energy is produced in the whole layer uniformly, while the production of the temperature fluctuation is dominant in the wall layer. Their dissipations are uniform in the convection layer and become large as the wall is approached. Thus, the diffusion of turbulent energy occurs from the convection layer to the wall layer and that of the temperature fluctuation is from the wall layer to the convection layer. The detail examination of transport phenomenon in the thermal convection indicates that the temperature fluctuations are generated from the plumes in the wall layer, while the large-scale vortices in the convection layer act as sources of turbulent energy production.
  • 桑原 譲二, 岡本 孝司
    2006 年 26 巻 Supplement1 号 p. 115-116
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Shell and tube heat exchanger are widely used for various devices, such as steam generator, evaporator, and so on. It is very important to understand the flow structure around the tube and the relationship between the flow and the tube vibrations.
    In last study, we used test-section model made by FEP. In this study, we used new material MEXFRON and measured the cross-flow in the tube bundles using the Dynamic PIV. Compared with in case of the FEP, we obtained high S/N images using the MEXFRON.
  • 染矢 聡, 岡本 孝司, 飯田 将雄
    2006 年 26 巻 Supplement1 号 p. 117-118
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Any wind instrument can sound due to the vibration of the air, expiration flow inside of the wind instrument. In case of a trumpet or a clarinet, a mouth or a reed helps to sound variable tones. In case of a flute, there is no mechanical vibration. We would like to investigate more detail about the flow and the vibration with sound inside or outside of the flute, in order to understand the mechanism of the wind instrument and to aid in the manufacture of the good instrument. In this report, a Japanese traditional bamboo flute was used in the experiment. The dynamic PIN technique was applied to measure the vibration. 2 kinds of experiments were done. The Argon-gas flow with different tone inside/outside of the bamboo flute was measured using a high frequency pulse laser. Oil mist was used as the tracer particles. Then, we also tried to measure the flow in bamboo flute when a human player played, using a CW-laser and the water-mist as the tracers. We successfully measured that the periodical flow near a hole of the bamboo flute went out from and came into the flute at 200-500Hz dependent on the tone.
  • 吉田 智, 染矢 聡, 田畑 隆英, 中島 正弘, 岡本 孝司
    2006 年 26 巻 Supplement1 号 p. 119-120
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    A basic characteristic of parallel flow with a chemical reaction, especially the effects of chemical reaction on the process of mixing has been investigated. In this study, the process of the mixing has been experimentally investigated using the LIF-PIV techniques. In this paper, the reaction between the ammonia solution and the acetic acid solution has been selected as a simple irreversible chemical reaction. The reaction between these solutions has negligible small heat of the reaction. The process of mixing has been estimated qualitatively by the LIF technique. In order to evaluate the process of mixing quantitatively, the PIV technique has been carried out. As a result, it has been found that the mixing with chemical reaction is relatively suppressed, comparing with that without chemical one.
  • 近江 和生, 平井 祐輔
    2006 年 26 巻 Supplement1 号 p. 121-124
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    A self-organizing map (SOM) neural network algorithm is skillfully combined with more conventional 3-D PTV algorithms using nearest-neighbor particle matching. Of the two steps of particle pairing in 3-D PTV, the spatial particle pairing is basically conducted on a nearest-neighbor matching basis, while the temporal particle pairing is consigned to the SOM neural network. However, this is not a simple role sharing method. The two steps of particle pairing are entirely incorporated in the iterative calculation of the SOM neural network learning. So the learning does not only affect the each-step results of temporal particle pairing but also those of the next-coming spatial particle pairing. This new scheme is tested with the particle data of the PIV Standard Image and the matching results are compared to those of earlier schemes.
  • 武藤 昌也, 大島 まり, 大島 伸行
    2006 年 26 巻 Supplement1 号 p. 125-128
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    A particle-mask-correlation (PMC) method is developed to identify the multi-sized particles for Particle Tracking Velocimetry (PTV). The main principle of the technique is to utilize the difference of the correlation value obtained from correlation calculation between the particle mask and the particle image with multi-sized particles. The accuracy and the validity of the PMC method have been studied in the present research for different mask widths, M, and standard deviation δ of the mask. In the particle image, each particle is large enough so that the airy disk can be neglect and the particle diameters are easy to be distinguished. Investigation of the PMC method has been started with the artificial particle images, and then testified using actual PTV images. It has been shown that the two diameters dp, and d'can be well distinguished if d'/dp>2.5; correlation value is most decreased when the distance between two particles 1 is identical to the particle diameter dp.
  • 増田 則夫, 岩波 瑞樹, 安道 徳昭
    2006 年 26 巻 Supplement1 号 p. 129-132
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    High-frequency current unintentionally emitted from the power circuits of integrated circuits (ICs) often causes serious electromagnetic-interference (EMI) problems and power integrity (PI) problems. Visualizing electromagnetic field over an IC chip is useful for searching for emission source. Obtaining the magnitude and waveform of the current at each packaging level is a more direct way to check the performance of on-chip decoupling circuits and simulation models of the power circuits.
    First, we developed micro-magnetic field probes that had 50-to 500-μm-wide micro-shielded loop coils for on-chip measurement. The coils were made using a precise thin-film process. The spatial resolution of the probes was 15μm at a 6-dB degrading point. We separated the power current waveform of each circuit block when measuring areas of 30-to 50-μm-wide power traces connected to different circuit blocks.
    Second, we developed fiber edge electro-optical (FEEO) probe and fiber edge magneto-optical probe (FEMO). FEEO probe is miniaturized to 125μm in diameter using aerosol deposition (AD) method for the measurement at the ball of ball grid allay (BGA) package.
  • 新井 康平, 斉藤 義和
    2006 年 26 巻 Supplement1 号 p. 133-136
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    A method for change detection in time and space domains based on wavelet MRA: Multi-Resolution Analysis is proposed. Measring stations for carbon di-oxide concentration are sparsely situated. Also the measuring stations monitor the carbon, di-oxide concentration in an iregular basis so that some interporation techniques are required for creation of carbon dioxide concentration with a regular interval in both time and space domains. After all, time and space of MRA is applied to the interporated carbon di-oxide concentration then reconstruction is done without low frequency of LLL component. Thus relatively large change locations and time periods are detected. Through an experiment with 11 years of carbon di-oxide concentration data starting from 1990 provided by WDCGG: World Data Center for Greehouse Gasses, it is found that there exists seasonal change and relatively large changes are occured in ElNino years. It is also found that the carbon di-oxide is concentrated in European continent and northen American continent as well as far east Asian continent.
  • 新井 康平, 坂 正範
    2006 年 26 巻 Supplement1 号 p. 137-140
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    A method for embedded object detection with radar echo data by means of wavelet analysis of MRA: Multi-Resolution Analysis, in particular, three dimensional wavelet transformation is proposed. In order to improve embedded object detecting capability, not only one dimensional radar echo data but also three dimensional data are used. Through a comparison between one dimensional edge detection with Sobel operator and three dimensional wavelet tarnsformation based edge detection, it is found that the proposed method is superior to the Sobel operator based method.
  • 高 翔, 小杉山 格, 齋藤 兆古, 堀井 清之
    2006 年 26 巻 Supplement1 号 p. 141-144
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    This paper concerns with a methodology of geometrical characteristic extraction from visualized dynamic image. At first, we briefly describe the color Eigen pattern method, which has been proposed by us to cognize the static images realizing the fully automatic security and product inspection systems. Since this color Eigen pattern method is based on the color information of distinct target image, then it is possible to cognize the target having the same color information. On the other side, our color Eigen pattern method could not distinguish the different targets having the same color information.
    To overcome this difficulty, we propose here a geometrical Eigen pattern method based on the Fourier Cosinusoidal transform. As a result, it is revealed that fairly good cognition may be promised by our geometrical Eigen pattern method at the initial test stage.
  • 新井 康平, 瀬戸 要, 西川 友子
    2006 年 26 巻 Supplement1 号 p. 145-148
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    A method for accelerating and rotating moving three dimensional objects identification by means of wavelet analysis is proposed. It is found that the identification performance depends on moving characteristics as well as the support length of the base function of wavelet transformation.
  • 新井 康平
    2006 年 26 巻 Supplement1 号 p. 149-152
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    A method for polarimetric Synthetic Aparture Radar: SAR image classification with high frequency component derived from wavelet Multi-Resolution Analysis: MRA is proposed. Although it is well known that polarization signature derived from fully polarized SAR data is useful for SAR image classifications, it is still unknown how to utilize the polarization signature in the image classification. High frequency component of the polarization signature calculated with the fully polarized SAR data is taken as one of the features utilizing in the classification into account. Thus improvement of classification performance is achieved for the proposed classification method of which such feature is included in the feature space for the Maximum Likelihood based classification method.
  • 遠藤 久, 高木 敏行
    2006 年 26 巻 Supplement1 号 p. 153-154
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    This paper discusses the improvement of an ill-posed linear system solutions concerning with multidimensional field distribution problems. The discrete Wavelet transforms arrange the system matrix as well as input vector to solve, compressing the data density to mother wavelets. This transformed system reduces the effects of a vector representing multidimensional data. An inverse source problem in magnetic field is taken up to compare the solutions given by generalized vector sampled pattern matching method (GVSPM). As a result, we have found that lower order Wavelet bases perform efficient analysis and higher accuracy of solutions.
  • 水野 明哲, 飯田 明由, 月成 卓也
    2006 年 26 巻 Supplement1 号 p. 155-158
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Grandville law, which is one of the technical analysis methods, is combined with Wavelet analysis. We have performed evaluation of the effectiveness of the analysis technique for estimating stock prices. The optimal parameters are searched both for Grandville law and Wavelet analysis by simulation for 11 years, applied to 20 descriptions. The obtained parameters are applied to other 30 descriptions in order to evaluate the method. We compared performances by single Granville law, single Wavelet analysis and the combination of these, which is our proposal. The result showed that the combined method is the most excellent in that it can be applied to many descriptions properly, and an average gain was 36%.
  • 井波 真弓, 齋藤 兆古, 堀井 清之
    2006 年 26 巻 Supplement1 号 p. 159-162
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    Particles "Yo", " Ne", " Yone" in "Kindai Nogaku Shu" were examined by the discrete wavelets multi-resolution analysis. As a result, it has been clarified that "Yone", appeared one time in the last volume, is used implicitly for independence and occupies the whole work in form of replacing of "Yo" comparatively many appearance in frequency.
    The appearance in frequency of three elements of particles "Yo", "Ne", "Yone" was visualized by the wavelets resolution levels 1 to 4 representations which are corresponding from the average of the whole work to the rate of change in each of the adjacent volumes, respectively. It is evident that maximum amplitude is different in each level and the particle taking maximum value becomes an index to judge a tendency. The wavelets analysis has visualized that the tendency of this work is taking situation of insistence from level 1 indicating average.
  • 井波 真弓, 齋藤 兆古, 堀井 清之
    2006 年 26 巻 Supplement1 号 p. 163-166
    発行日: 2006/07/01
    公開日: 2009/07/31
    ジャーナル フリー
    After applying discrete wavelets multi-resolution analysis to literary works, it is verified that this method considerably removes the analyzed results from the dependency of analyst. Nevertheless, it is difficult to remove the choice and collection of analysis data depending on personal experience exactly. By introducing a general idea of Orthnormal Analysis, duplicated information in analysis data gets objectivity and each data gets same weight to the work. This paper applies Orthonormal Linear Space System Analysis to the selected data comprising the vectors of "The Tale of Genji", after that multi-resolution analysis of discrete wavelets is applied to these vectors. The term vector is built by three keywords of feeling "Inclination", "Disinclination" and "Adoration". As a result, it is revealed that the story is constituted by "Inclination" and "Adoration", and the visualized curve of "Adoration" has common part to "Inclination" in every level in one episode in "The tale of Genji "Utsusemi story". Further, it is visualized that the same tendency of conventional opinion that the hero's emotion fluctuates due to triflingness of the heartless attitude of the heroin and loss feeling of youth of hero. On the other hand, it is extracted the characteristic more in detail.
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