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RISS 인기검색어
- 검색키워드
- 저자 : Haruna Endo (검색결과 3 건)
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Prasetyo, Agung,Endo, Ryota,Takashima, Yuya,Aiso, Haruna,Hidayati, Fanny,Tanabe, Jun,Ishiguri, Futoshi,Iizuka, Kazuya,Yokota, Shinso Institute of Forest Science 2015 Journal of Forest Science Vol.31 No.3
Zelkova serrata is an important hardwood species for the timber industry in Japan. Tree breeding programs for this species have mainly focused on growth characteristics such as stem diameter (D), tree height (TH), stem form, and branching. In order to fulfill timber industry needs, wood quality improvement should be included in the tree breeding program of this species. In the present study, growth characteristics, such as D and TH, and the stress-wave velocity (SWV), which is highly correlated with Young's modulus of wood, were measured for 20-year-old Z. serrata from eight half-sib families planted in a progeny test site with three different initial spacings. Significant differences in all the measured characteristics were found among the eight half-sib families. The variance components of the half-sib families for D, TH, and SWV were 27.2%, 47.3%, and 33.5%, respectively. These results indicate that all the measured characteristics of this species could be improved by tree breeding programs. In addition, only low correlation coefficients were obtained between the growth characteristics and SWV, indicating that extensive selection on SWV in tree breeding programs may not always lead to a reduction in yield volume.
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Agung Prasetyo,Ryota Endo,Yuya Takashima,Haruna Aiso,Fanny Hidayati,Jun Tanabe,Futoshi Ishiguri,Kazuya Iizuka,Shinso Yokota 강원대학교 산림과학연구소 2015 Journal of Forest Science Vol.31 No.3
Zelkova serrata is an important hardwood species for the timber industry in Japan. Tree breeding programs for this species have mainly focused on growth characteristics such as stem diameter (D), tree height (TH), stem form, and branching. In order to fulfill timber industry needs, wood quality improvement should be included in the tree breeding program of this species. In the present study, growth characteristics, such as D and TH, and the stress- wave velocity (SWV), which is highly correlated with Young’s modulus of wood, were measured for 20-year-old Z. serrata from eight half-sib families planted in a progeny test site with three different initial spacings. Significant differences in all the measured characteristics were found among the eight half-sib families. The variance components of the half-sib families for D, TH, and SWV were 27.2%, 47.3%, and 33.5%, respectively. These results indicate that all the measured characteristics of this species could be improved by tree breeding programs. In addition, only low correlation coefficients were obtained between the growth characteristics and SWV, indicating that extensive selection on SWV in tree breeding programs may not always lead to a reduction in yield volume.
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Naoki Nakamura,Osamu Takahashi,Minobu Kamo,Shogo Hatanaka,Haruna Endo,Norifumi Mizuno,Naoto Shikama,Mami Ogita,Kenji Sekiguchi 한국유방암학회 2014 Journal of breast cancer Vol.17 No.2
Purpose: The purpose of this study was to quantify the targetcoverage, homogeneity, and robustness of the dose distributionsagainst geometrical uncertainties associated with fourwhole breast radiotherapy techniques. Methods: The study wasbased on the planning-computed tomography-datasets of 20patients who underwent whole breast radiotherapy. A total offour treatment plans (wedge, field-in-field [FIF], hybrid intensitymodulatedradiotherapy [IMRT], and full IMRT) were created foreach patient. The hybrid IMRT plans comprised two opposedtangential open beams plus two IMRT beams. Setup errors weresimulated by moving the beam isocenters by 5 mm in the anterioror posterior direction. Results: With the original plan, thewedge technique yielded a high volume receiving ≥107% of theprescription dose (V107; 7.5%±4.2%), whereas the other threetechniques yielded excellent target coverage and homogeneity. A 5 mm anterior displacement caused a large and significant increasein the V107 (+5.2%±4.1%, p<0.01) with the FIF plan, butnot with the hybrid IMRT (+0.4%±1.2%, p=0.11) or full IMRT(+0.7%±1.8%, p=0.10) plan. A 5-mm posterior displacementcaused a large decrease in the V95 with the hybrid IMRT (-2.5%±3.7%, p<0.01) and full IMRT (-4.3%±5.1%, p<0.01) plans, butnot with the FIF plan (+0.1%±0.7%, p=0.74). The decrease inV95 was significantly smaller with the hybrid IMRT plan than withthe full IMRT plan (p<0.01). Conclusion: The FIF, hybrid IMRT,and full IMRT plans offered excellent target coverage and homogeneity. Hybrid IMRT provided better robustness against geometricaluncertainties than full IMRT, whereas FIF provided comparablerobustness to that of hybrid IMRT
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