209 research outputs found
鳥取県多里地方産のクロム鉄鉱の成因
No full textThe writer has studied the chromites in the Tari district, Tottori Prefecture and some facts relating to the minerals. The reports are included chiefly in the Nihon Ganseki Kobutsu Kosho Gakkai Shi (The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists) and the Shimane Daigaku Ronshu (Bulletln of the Shimane University (Natural Science)). The author describes chiefly the origin of chromites in the present paper
鳥取県多里地方のクローム鉄鉱並に母岩に関する研究
No full textThe Tari district, Tottori Prefecture, is situated about 43 km. SSE of Matsue city, Shimane Prefecture.
The mines in this district are situated about 800 m. above the sea-level, and are about 400 m. above than the Tari environs.
Serpentinites or serpentinized peridotites occur near the ridge among the boundary line of Shimane, Tottori, Okayama and Hiroshima Prefectures, and occupy a moderately large area.
The characteristic geology in the Tari district is that these ulta-basic rocks intrude in Palaeozoic sediments and some serpentinites associate with chromites.
In this paper, the writer summarized the results of studies on the chromites and their country rocks in this district, including the description of two kinds of leuchtenbergite found by the author.
The author wishes to express his gratitude to President S. Yamane and Assistant Professor S. Nishiyama of Shimane University for their encouragemements.
The expences of this study was partly defrayed by the Sientific Reserches provided from the Ministry Education of Japan, to which the writer wishes to express his thanks
益田市の中新統益田層群産軟体動物化石 : 島根県産軟体動物化石(その２)
No full textAbundant fossils of Vicarya and other molluscs were found by the students of a jounior high school at Okuda in the south of Masuda City in December of 1977 (Textfig. 1). Recently the details were reported by TANAKA (1981). After this discovery, many specimens have been collected on the chance of the geological training for students of Shimane University and some excursions at the site. Here to fore, twenty species of molluscs have been identified by the author's examination of these specimens and TANAKA'S collections. In this paper, they will be described.
The author wishes to express his hearty thanks to Mr. Ikutaro TANAKA of Kuraki Junior High School, Muika-ichi-cho, Shimane Prefecture, for providing fossil specimens and Dr. Junji ITOIGAWA of Nagoya University, Professor Masahiro OKUBO and Dr. Takao TOKUOKA of Shimane University for their helpful advice
パンペリー石-アクチノ閃石片岩中のパンペリー石の安定領域に関する実験結果(予報)
No full textMany fossils from various localities in Shimane Prefecture have been deposited in the Department of Geology, Shimane University, but most of them yet remains to be examined. Therefore, the serial work was planned by the present author to identify and illustrate the specimens for further studies. As the Part 1 of the work, the fossils from Nange, Matsue City, are examined. From Nange, about 1O species of molluscs were listed by OTUKA (1938) and NOMURA and HATAI (1939) individually, but they were neither described nor illustrated.
Before the examination, I wish to thank Dr. Junji ITOIGAWA Of Nagoya University for his valuable aid in identifying the specimens. A part of this study was supported by the scientific research fund from the Ministry of Education
松江市南家の化石 : 島根県産軟体動物化石(その1)
No full textMany fossils from various localities in Shimane Prefecture have been deposited in the Department of Geology, Shimane University, but most of them yet remains to be examined. Therefore, the serial work was planned by the present author to identify and illustrate the specimens for further studies. As the Part 1 of the work, the fossils from Nange, Matsue City, are examined. From Nange, about 1O species of molluscs were listed by OTUKA (1938) and NOMURA and HATAI (1939) individually, but they were neither described nor illustrated.
Before the examination, I wish to thank Dr. Junji ITOIGAWA Of Nagoya University for his valuable aid in identifying the specimens. A part of this study was supported by the scientific research fund from the Ministry of Education
松くい虫被害量推移モデルの誘導とその適合性
No full textThis paper is intended to present a model for describing the dynamics of actual wood volume damaged by the pine wilt disease. Applying the KERMACK-MCKENDRICK epidemic curve (1927), the author derived the simulation model which can be written as follows ;
f(t)=M sech2{k(t-τ)}
where M, maximum of wood volume damaged by the pine wilt disease (m3); k, intrinsic rate (year-l); τ, time of maximum damaged volume (year); t, time (year), and f(t), damaged volume at time t (m3). The simulation model was fitted to observed data of wood volume damaged by the pine wilt disease from 1973 to 1990 in Shimane Prefecture and Hikawa-cho respectively and was tested its applicability
Validation of a new mass screening tool for cognitive impairment: Cognitive Assessment for Dementia, iPad version
No full textKeiichi Onoda,1 Tsuyoshi Hamano,2 Yoko Nabika,1 Atsuo Aoyama,1 Hiroyuki Takayoshi,1 Tomonori Nakagawa,1 Masaki Ishihara,1 Shingo Mitaki,1 Takuya Yamaguchi,1 Hiroaki Oguro,1 Kuninori Shiwaku,3 Shuhei Yamaguchi1 1Department of Neurology, 2Center for Community-Based Health Research and Education, Shimane University, Izumo, 3Shimane University, Matsue, Shimane, Japan Background: We have developed a new screening test for dementia that runs on an iPad and can be used for mass screening, known as the Cognitive Assessment for Dementia, iPad version (CADi). The CADi consists of items involving immediate recognition memory for three words, semantic memory, categorization of six objects, subtraction, backward repetition of digits, cube rotation, pyramid rotation, trail making A, trail making B, and delayed recognition memory for three words. The present study examined the reliability and validity of the CADi. Methods: CADi evaluations were conducted for patients with dementia, healthy subjects selected from a brain checkup system, and community-dwelling elderly people participating in health checkups. Results: CADi scores were lower for dementia patients than for healthy elderly individuals and correlated significantly with Mini-Mental State Examination scores. Cronbach’s alpha values for the CADi were acceptable (over 0.7), and test–retest reliability was confirmed via a significant correlation between scores separated by a one-year interval. Conclusion: These results suggest that the CADi is a useful tool for mass screening of dementia in Japanese populations. Keywords: dementia, mass screening, early detection, iPa
Geometry of Homogeneous Left Lie Loops and Tangent Lie Triple Algebras
No full textOn occasion of retirement from Department of Mathematics, Shimane University, in March 1999, looking back upon the researching life over thirty years, which has been devoted to establishing an extensive theory of non-associative generalization of the theory of Lie groups, the author would like to present here a summary of his scientific works
高校生の英語スピーキングに対する学習意欲を踏まえた指導実践 : 効果的なリテリング活動の開発
No full textThe purpose of this study is to show how retelling activities can be used to enhance Japanese high school students’ English proficiency. As a graduate student. the author participated in a ２-year teaching practicum at a public high school in Shimane Prefecture. The first-year research showed that retelling activities can provide students with valuable opportunities to practice speaking in their own words. Therefore, in the following year, experimental instruction was designed and given to two classes, and its effects were evaluated relative to a control group in terms of the amount of students’ utterances in retelling tasks. The results show that a) retelling activities increased the number of words students speak for １ min (but n. s.), and b) interactive instruction can be used to teach implicit retelling skills
島根・鳥取・岡山・広島県境地域の超塩基性岩に随伴する鉱物(IV) : 島根県広瀬鉱山産アルミニウム透角閃石と岡山県高瀬鉱山産鉄透角閃石
No full textSubtitle : Aluminous Tremolite from the Hirose Mine, Shimane Pref. and Ferrian Tremolite from the Takase Mine, Okayama Pref.
Abstract: Geology of these area was reported before by the author, so it will not be described on again in this paper.
The sample No. 1 was found at 34 m level of Hirose mine, and the sample No 2 was discovered at new No. 3 level of Takase mine.
Both of the country rock of these samples are pyroxenite composed of enstatite an_d diopside, and a little part of them has been affected by residual magmatic autometamorphism, then tremolite was produced.
It can be considered that the addition of Si0_2 and H_20 to these country rocks (pyroxenite) reacted chemically as the following equation.
3MgSi0_3 (enstatite) +2CaMgSi_20_6 (diopside) +Si0_2 + H_20→ (OH)_2Ca_2Mg_5Si_80_ (tremolite) In this reaction, the metamorphism does not advance so as to produce hornblende. The reason why fluorine does not exist in tremolite as shown in the chemical analysis table, is that pyroxenite was not metamorphosed by granitic rock.
On the other hand, harzburgite has been metamorphosed by dioritic rock, and then asbestiform tremolite in small quantities has been crystallized from the harzburgite. The occurrences are sometimes observed in the region The general reaction equation may be expressed as follows.
MgSi0_3 +Mg_2Si0_3 (olivine) +Si0_2 +CaO (from diorite) +H_20 →(OH)_2Ca_2Mg_5Si_80_<22
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