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백태경 ( Tae Kyung Baek ),山下三平 ( Sampei Yamashita2 ) 한국지리정보학회 2013 한국지리정보학회지 Vol.16 No.1
This study is to compare and analyze the current status of landscape planning system in Korea and Japan by establishing the landscape database utilizing geographic information system(GIS). Specifically, landscape laws and their ordinances enacted in Korea and Japan and their implementation cases were compared to identify the characteristics. As of December 1, 2010, landscape administrative bodies are composed of 472 local governments in Japan while as of March 1, 2010, they are 83 local governments in Korea. The landscape laws in Korea and Japan have a similar structure overall. However, there are no supplementary provision and penal provision in the Korean landscape law whereas there is landscape district provision in the Japanese landscape law. The results of this study would be used as a base for building up the landscape planning and policy in the East Asian region.
Yamashita, Yasuhiko,Kushima, Soichiro,Okuno, Yuuichirou,Morishita, Taisei Council on Tall Building and Urban Habitat Korea 2018 International journal of high-rise buildings Vol.7 No.3
This paper introduces three distinctive means for the use of a 189-meter high damped structure ensuring safety against earthquake: 1. Realization of L-shaped elevational structural planning: The bottom and top of the tower have belt trusses and hat trusses respectively to restrain the bending deformation. Furthermore, large-capacity oil dampers (damping force 6,000 kN) are installed in the middle part of the tower to restrain the higher-mode deformation. 2. Realization of L-shaped planar structural planning: We devised a means of matching the centers of gravity and rigidity by adjusting planar rigidity. Moreover, viscous damping devices are located at the edges of the L-shaped plan, where torsional deformation tends to be amplified. We call this the "Damping Tail" system. 3. Composite foundation to equalize deformations under different loading conditions: We studied the vertical and horizontal deformations using sway-rocking and 3D FEM models including the ground, and applied multi-stage diameter-enlarged piles to the tower and a mat foundation to the podium to keep the foundations from torsional deformations and ensure structural safety.
Yamashita, Daichi,Kimura, Satoshi,Wada, Masahisa,Takabe, Keiji Springer-Verlag 2016 Journal of wood science Vol.62 No.2
<P>The traditional Maule color reaction was improved by use of tris(hydroxymethyl) aminomethane-hydrochloride acid (Tris-HCl) buffer coupled with a fluorescence microscope. The purple-red color of Maule-treated hardwood was more stable with the novel treatment than with traditional treatment. In addition, Maule-treated wood samples had a characteristic fluorescence when excited with blue (460-495 nm) light. Examination of white birch (Betula platyphylla) showed that syringyl-rich and guaiacyl-rich cell walls emitted red and yellow fluorescence, respectively. Measuring the fluorescence spectra of hardwood and softwood powders after treatment with the new Maule reagents showed that hardwood powder containing syringyl lignin emitted a red fluorescence, whereas softwood powder containing guaiacyl lignin emitted a green fluorescence when excited with blue light. In conclusion, this improved technique has many advantages compared with the traditional Maule color test.</P>
Public Speeches with Competent Speakers: Speech Pauses, Head Movements, and Lexical Choices
Yamashita. Yuko,Fuyuno. Miharu 영상영어교육학회 2015 영상영어교육 (STEM journal) Vol.16 No.4
This study quantitatively explored the characteristics of a good public speech performance as the first step towards establishing objective indexes for teaching and learning public speaking performance. Video recordings of commencement speeches delivered by 10 native English speakers during graduation ceremonies at different universities were obtained from the universitys’ official websites. First, we extracted silent pauses with an automatized software device. Silent intervals longer than or equal to 0.1 s were included, and filled pauses were excluded. These pauses were divided into three categories: period, comma, and others. The distribution of speech pauses based on their types and duration were analyzed. For non-verbal aspects, head movement patterns of each speaker were obtained. We also analyzed lexical choices of each speaker quantitatively with respect to frequency levels based on “Vocabprofile”: frequent 1000-word families, the second 1000-word families, the academic word list, and words that do not appear on other lists. The following findings emerged: 1) The competent speakers clearly divided the pause duration among the pause categories; 2) they looked at the audience frequently (10-20 times per minute); and 3) they tended to avoid difficult words and chose frequent words, and employed repetition.
Therapeutic Uses of the Radioactive Isotope
Yamashita, Hisao 대한핵의학회 1971 핵의학 분자영상 Vol.5 No.1
Therapeutic uses of the radioactive isotope can be devided in 3 groups, i.e. 1) Brachytherapy. 2) Multicurie teletherapy and 3) Internal use of naked radioisotope. By utilizing their radioactivity, radioisotopes can be well adapted as effective means to radiaton therapy. From the beginning of the 20th century, natural radioactive substances, like radium, have been widely used for the purpose of the treatment of cancer and other diseases, and have been giving pretty good effects. In the present case of artificial radioisotopes, their applicable fields are not the same with radium, but reach far out to such broader extents, and larger amounts with varieties almost unthinkable with radium. New fields were also cultivated for application of radioisotope directly into human body, and thereby to bring out desirable therapeutic effects. $quot;
Effect of ammonia treatment on white birch wood
Yamashita, Daichi,Kimura, Satoshi,Wada, Masahisa,Samejima, Masahiro,Takabe, Keiji Walter de Gruyter und Co 2018 Holzforschung Vol. No.
<P><B>Abstract</B></P><P>Transverse sections of white birch (<I>Betula platyphylla</I>) were treated with anhydrous ammonia at 60-140°C (ammonia treatment, AT). As a result, the crystal structure of cellulose in the AT samples changed to cellulose III<SUB>I</SUB>, and acetamide was produced. The surface area of the AT samples, the amount of sugar released upon acid hydrolysis and the lignin content were not changed. However, a small amount of lignin became acid soluble. Mäule color reaction, indicative of the presence of syringyl lignin, showed decreasing color intensities with increasing temperature of AT. The results can be easily interpreted that AT affects ester linkages and side chains of hemicelluloses and syringyl lignin. In addition, AT was carried out on 1-μm thick transverse sections and block specimens. Xylanase treatment and immunolabeling revealed that AT enhances xylan degradation, but ray cells are resistant to xylanase even after AT. On the block sample, a deposited xylan layer appeared on the inner surface of fiber cell walls. Apparently, xylan moved to the surface in contact with the fluid ammonia during AT. The vessel cell wall did not show a similar migration effect, indicating a cell wall-specific interaction with ammonia.</P>