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Institution

Utsunomiya University

EducationUtsunomiya, Japan
About: Utsunomiya University is a education organization based out in Utsunomiya, Japan. It is known for research contribution in the topics: Laser & Holography. The organization has 4139 authors who have published 6812 publications receiving 91975 citations. The organization is also known as: Utsunomiya daigaku.


Papers
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Journal ArticleDOI
TL;DR: There are no universal scaling relationships of growth or mortality with size among trees in tropical forests, and a set of alternative predictions were developed that retained some assumptions of metabolic ecology while also considering how availability of a key limiting resource, light, changes with tree size.
Abstract: The theory of metabolic ecology predicts specific relationships among tree stem diameter, biomass, height, growth and mortality. As demographic rates are important to estimates of carbon fluxes in forests, this theory might offer important insights into the global carbon budget, and deserves careful assessment. We assembled data from 10 oldgrowth tropical forests encompassing censuses of 367 ha and > 1.7 million trees to test the theory’s predictions. We also developed a set of alternative predictions that retained some assumptions of metabolic ecology while also considering how availability of a key limiting resource, light, changes with tree size. Our results show that there are no universal scaling relationships of growth or mortality with size among trees in tropical forests. Observed patterns were consistent with our alternative model in the one site where we had the data necessary to evaluate it, and were inconsistent with the predictions of metabolic ecology in all forests.

317 citations

Journal ArticleDOI
TL;DR: The most successful teacher induction programs reported in this article include opportunities for experts and neophytes to learn together in a supportive environment promoting time for collaboration, reflection and acculturation into the profession of teaching.
Abstract: How does one become an effective teacher? What can be done to stem high attrition rates among beginning teachers? While many teachers are left to ‘sink or swim’ in their first year—learning by trial and error, there remain a number of outstanding examples of collaboration and collegiality in teacher induction programs. Analysis of the most exemplary teacher induction programs from Australia, Britain, Canada, France, Germany, Japan, New Zealand and the United States revealed common attributes and exceptional features. The most successful teacher induction programs reported here include opportunities for experts and neophytes to learn together in a supportive environment promoting time for collaboration, reflection and acculturation into the profession of teaching. Furthermore, several practices unique to specific regions were highlighted. These included extended internship programs, specially trained mentors, comprehensive inservice training and reduced teaching assignments for beginning teachers with an e...

302 citations

Journal ArticleDOI
TL;DR: The simulation of the laser-plasma interaction revealed the existence of ultrahigh-gradient wake fields excited due to self-modulation of the lasers pulse and its electron acceleration, consistent with the experimental results.
Abstract: A laser pulse with a power of $\ensuremath{\sim}3$ TW and a duration of 1 ps has been focused onto a gas. Ultrahigh-gradient electron acceleration has been observed in the laser-produced plasma with a density of $\ensuremath{\sim}{10}^{19}$ c${\mathrm{m}}^{\char21{}3}$ when injecting 1 MeV $/c$ electrons. The simulation of the laser-plasma interaction revealed the existence of ultrahigh-gradient wake fields excited due to self-modulation of the laser pulse and its electron acceleration, consistent with the experimental results.

291 citations

Journal ArticleDOI
01 Jun 2012-Planta
TL;DR: Distinct reductions in shoot P levels were observed in plants grown under N deficiency, except for tomato, in which shoot P level was increased by N starvation, suggesting that the P status of the shoot regulates SL exudation.
Abstract: Plants exude strigolactones (SLs) to attract symbiotic arbuscular mycorrhizal fungi in the rhizosphere. Previous studies have demonstrated that phosphorus (P) deficiency, but not nitrogen (N) deficiency, significantly promotes SL exudation in red clover, while in sorghum not only P deficiency but also N deficiency enhances SL exudation. There are differences between plant species in SL exudation under P- and N-deficient conditions, which may possibly be related to differences between legumes and non-legumes. To investigate this possibility in detail, the effects of N and P deficiencies on SL exudation were examined in Fabaceae (alfalfa and Chinese milk vetch), Asteraceae (marigold and lettuce), Solanaceae (tomato), and Poaceae (wheat) plants. In alfalfa as expected, and unexpectedly in tomato, only P deficiency promoted SL exudation. In contrast, in Chinese milk vetch, a leguminous plant, and in the other non-leguminous plants examined, N deficiency as well as P deficiency enhanced SL exudation. Distinct reductions in shoot P levels were observed in plants grown under N deficiency, except for tomato, in which shoot P level was increased by N starvation, suggesting that the P status of the shoot regulates SL exudation. There seems to be a correlation between shoot P levels and SL exudation across the species/families investigated.

280 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of surface modification with 3-aminopropyltriethoxysilane (APTES) and n-propyltriethyltrihexilanes (PTES) on photo-catalytic activity and UV-shielding ability of fine TiO2 particles were investigated.

270 citations


Authors

Showing all 4148 results

NameH-indexPapersCitations
Kazuhito Hashimoto12078161195
Yoshinori Yamamoto8595028130
S. Uehara7860223493
Minghua Liu7467920727
Akira Fujishima7029969335
Satoshi Hasegawa6970822153
Donald A. Tryk6724025469
Hiromu Suzuki6525015241
Kunio Arai6429315022
Kazuo Suzuki6350717786
Jin Wang6019610435
James B. Reid6024611773
Richard L. Smith5930211420
Isao Kubo5830311291
Takao Yokota5724511813
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20236
202231
2021247
2020315
2019315
2018289