著者
福山 博
出版者
Tokyo Geographical Society
雑誌
地学雑誌 (ISSN:0022135X)
巻号頁・発行日
vol.92, no.1, pp.55-67, 1983-02-25 (Released:2010-10-13)
参考文献数
11
被引用文献数
3 4

Minami-Iwo volcano is located at the southern end of Izu-Bonnin volcanic chain, 1300km south of Tokyo. It consists of three major volcanic edifices; older volcano I (OV1), older volcano II (OV2), and younger volcano (YV). At the boundaries between OV1 and OV2 and OV2 and YV, pyroclastic materials are characteristically observed; scoria fall deposit between OV1 and OV2, and scoria fall deposit and pyroclastic flow deposit between OV2 and YV. Older volcanoes, OV1 and OV2, are wholly composed of lava flows with both aa and pahoehoe surface textures. Younger volcano (YV), on the other hand, consists mainly of scoriaceous agglutinate which made up the steep slope of the main Minami-Iwo volcano. The older volcanoes are cut by numerous dikes (115 all told) which are dominant at the south and southwest sea cliffs. Four specimens collected from OV1, OV2 and dikes show normal thermoremnant magnetic orientation suggesting the oldest age less than a few hundred thousand years. Rocks of Minami-Iwo volcano are ankaramite, olivine basalt, augite-olivine basalt and plagioclase phyric basalt. The petrographic features and the chemical composition show that the rocks of Minami-Iwo volcano are of alkali rock series. The basalt of alkali rock affinity is the first discovery for volcanoes located at the volcanic front in Japan.
著者
巽 好幸 柵山 雅則 福山 博之 久城 育夫
出版者
特定非営利活動法人 日本火山学会
雑誌
火山.第2集 (ISSN:24330590)
巻号頁・発行日
vol.27, no.1, pp.45-65, 1982-04-30 (Released:2018-01-15)

The compositions of the primary tholeiitic, high-alumina and alkali-olivine basalt magmas (THB, HAB and AOB magmas, respectively) which are derived directly from the upper mantle beneath the volcanic arcs, are obtained by calculating the average compositions of liquid in equilibrium with the mantle peridotite, which can produce basalts in NE Japan arc through olivine maximum fractionation. Anhydrous high-pressure melting experiments on these three basalts indicate that the AOB and HAB magmas coexist with olivine, orthopyroxene and clinopyroxene at 1360℃ and 17.5 kbar and at 1340℃ and 15 kbar, respectively. The THB magma, on the other hand, coexists with olivine and orthopyroxene at 1320℃ and 11 kbar. The volcanic arc magmas are believed to contain significant amounts of water which affect the P-T conditions of the phase equilibria at high temperatures and pressures. However, the detailed petrographic studies on the rock suites in volcanic arcs revealed that the island arc primary basalt magmas contain water not more than 3 wt.% at generation in the upper mantle. Combining this with the experimental results, the THB, HAB and AOB magmas are suggested to segregate from the mantle at temperatures of about 1300℃ and at pressures of 11 kbar (THB), 16 kbar (HAB) and 20 kbar (AOB), respectively. As the temperatures of segregation of the magmas given above are too high for a stable mantle geotherm, the mantle diapir is the most probable mechanism for magma generation under the volcanic arcs. Due to the heat of formation of liquid in the diapir, the temperature of the diapiric mantle must be higher at deeper levels. The required temperature of the upper mantle is 1400℃ at a certain depth between the descending slab and depth of approximately 70km.
著者
永田 和宏 須佐 匡裕 福山 博之
出版者
東京工業大学
雑誌
基盤研究(B)
巻号頁・発行日
1997

以上の結果、たたら製鉄の特徴は低温度操業(約1350℃)、高酸素ポテンシャル(約1x10^<-12>atm)、急速加熱・急速反応(砂鉄投入から20〜30分で鋼あるいは銑鉄になる)であり、炭素濃度が1.5〜3.5%でシリコン濃度はほとんどトレース程度であり、リンと硫黄濃度も溶鉱炉法より低い値であることが分かった。このシリコン結果は熱力学的平衡から予想される値より非常に低く、現代製鉄法の製鉄原理とは異なっている。(6)たたら製鉄法の原理を現代製鉄法に応用するため、炭材内装ペレットを用いて銑鉄製造機構の解明を行った。その結果、不活性ガス中で急速加熱することにより約1350℃、約8分で銑鉄が生成することが分かり、新製鉄法の指針を得た。
著者
福山 博文 フクヤマ ヒロフミ FUKUYAMA Hirofumi
出版者
鹿児島大学
雑誌
地域政策科学研究 (ISSN:13490699)
巻号頁・発行日
no.11, pp.27-40, 2014-03

The purpose of this paper is to estimate both a performance model and a salary model of professional sports players by using a performance data in Major League Baseball (MLB), a performance data in NipponProfessional Baseball (NPB) and an annual salary data in NPB on foreign players who transferred the register to Japan from 2001 to 2013. As a result, the performance in MLB that influenced the salary when foreign players transferred the register to NPB was the total number of Home Run in MLB and the fact that "he was a major leaguer," whilethe performance in MLB that influenced the performance when they transferred the register to NPB was On-Base Percentage on the average in Minor League. In this paper, we showed that general managers in NPB wereaffected by information that gave a strong impression like the number of HR in MLB when they contracted to the foreign players. Therefore, we clarified that an availability heuristics was observed in the evaluation ofprofessional sports players.本論文では,2001年から2013年にNPB(日本プロ野球)に移籍した外国人選手のアメリカでのパフォーマンス・データとNPB でのパフォーマンス・データ,NPB での契約年俸データを用いて,パフォーマンス決定モデルおよび年俸決定モデルの推定を行っている。 推定の結果,NPB 移籍1年目での出塁率(On-Base Percentage,以下,OBP)に最も影響を及ぼすアメリカでのパフォーマンスは3A通算の平均OBP であるが,外国人選手のNPB での契約年俸に最も影響を及ぼすアメリカでのパフォーマンスはメジャーリーグ通算HR(本塁打)数と移籍前年にメジャーリーグに所属していることであった。本論文では,NPB の編成担当者が外国人選手と契約する際,メジャーリーグでのHR 数など強く印象として記憶に残りやすい情報の影響を受けやすく,利用可能性ヒューリスティックスがスポーツ選手の評価においても観察されることを明らかにした。
著者
細江 守紀 福山 博文
出版者
日本地域学会
雑誌
地域学研究 (ISSN:02876256)
巻号頁・発行日
vol.37, no.4, pp.1011-1030, 2007

In this paper we consider the design of environmental policies for illegal waste disposal problems using a model that consists of the firm and administration. The first feature of this paper introduces the penalty for evasive action by a firm that illegally disposes wastes. The second clarifies the influence information disclosures exert on policy design by comparison analysis of the disclosure of information on the monitoring budget (information disclosure strategy) and no disclosure (information closed-door strategy).<br> The main conclusions of this paper are as follows. The first conclusion of this paper is different from Becker (1968) that insists that it is necessary to raise the penalty level to the upper bound. That is, we showed that the penalty level should not be increased to the upper bound because the larger penalty level promotes evasion of the penalty. The second conclusion is that the monitoring budget under the information disclosure strategy is larger than under the information closed-door strategy. Also we showed that the penalty level under the information disclosure strategy is smaller than under the information closed-door strategy.<br><br>JEL Classification: Q28, Q29
著者
森田 浩 刀根 薫 福山 博文 上田 徹 廣津 信義 関谷 和之 実積 寿也 刀根 薫 福山 博文 上田 徹 廣津 信義 実積 寿也 関谷 和之 高橋 新吾 篠原 正明
出版者
大阪大学
雑誌
基盤研究(A)
巻号頁・発行日
2006

DEAにおける理論と応用の両面からの展開とその融合研究を行った。ネットワークDEAや不確実性下のDEA、評価指標の開発などの理論的貢献とこれらの成果の多様な分野への適用による事例研究における応用面での貢献を得ることができた。さらに、国際シンポジウムの開催や外国人研究者の招へいなどによる国際交流の活性化および国内におけるDEA研究の中心的役割を果たすことができた。