349 research outputs found

    Modal mineral abundances and the differentiation trends in primitive achondrites

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    The mineral distribution maps of polished thin sections (PTSs) of acapulcoites (Acapulco, Allan Hills (ALH) 77081,ALH78230,Elephant Moraine (EET) 84302 and Yamato (Y)-8307) and lodranites (Gibson, MacAlpine Hills (MAC) 88177,Y-74357,Y-75274,Y-791491 and Y-8002), winonaites (Tierra Blanca, Y-74025,Y-75305 and Y-8005), silicate inclusions in IAB iron meteorites (Y-791058 and Caddo County), and an H7 chondrite (Y-75008) were made from elemental distribution maps of the electron probe microanalyzer to obtain quantitative modal abundances of minerals, and to study variations in the distributions of minerals. The trends of variations of chemical compositions of minerals were also studied. Other related meteorites, ALH81187 and ALH81261 (acapulcoites) were also studied for comparison. Textures of these meteorites are various from fine-grained recrystallized chondrite-like materials including minerals known in chondrites, to coarse-grained materials with opaque mineral grains which have complex shapes, often with large aggregates of Fe-Ni metal. The variety of modal abundances and textures of primitive achondrites suggests that heterogeneity produced by local segregation of partially melted materials on their parent bodies can explain the origin of variation of primitive achondrites. Systematic variations in the relative abundances of olivine, augite+plagioclase, and orthopyroxene shows that the plagioclase-augite-rich region of Caddo County B3A (augite+plagioclase=96.8%) can be taken as an endmember of the variations observed in other primitive achondrites. The orthopyroxene-chromite-rich region of EET84302,19 (orthopyroxene=95.1%) and Y-74357 (olivine=83.2%) are other types of segregated materials. The mechanism proposed in this paper reveals the early differentiation processes of planetesimals from primitive source materials

    Comparisons of textural and chemical variations of minerals in some primitive achondrites and an H7 chondrite, with reference to their formation and cooling histories

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    The textures and trends of chemical variations of minerals in five acapulcoites (Acapulco, Allan Hills (ALH)-77081,ALH-78230,ALH-81187 and ALH-81261), two winonaites (Tierra Blanca and Yamato (Y)-74025) and an H7 chondrite (Y-75008) were studied for comparison to deduce their formation conditions and subsolidus cooling histories. The mineral distribution maps of polished thin sections (PTSs) of ALH-78230,Tierra Blanca, Y-74025,Y-75008,were made from elemental distribution maps of the electron probe microanalyzer to study variations in the distributions of minerals. Textures of these meteorites are fine-grained recrystallized chondrite-like materials including minerals known in chondrites. Opaque mineral grains have complex shapes, often with large aggregates of Fe-Ni metals, as was observed in Y-74025. Elongation parameters defined as L/(4πS)^ (=A), range from 1.4 to 1.6 for acapulcoites, where L is length and S is area of a grain. Despite their formation in different parent bodies, the variety of textures of primitive achondrites suggests that heterogeneity produced by local segregation of partially melted materials on their parent bodies can explain the origin of variation of primitive achondrites. CaO zoning of orthopyroxene can be attributed to the segregation and migration of Ca-rich partial melts. Mg/Fe variations of olivine can be explained by subsolidus reduction, when their parent body was disrupted or fractured by an impact while its interior was still hot

    Relationships between Spirituality, Health Self-efficacy and Health Locus of Control in the Elderly

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    The purpose of this study was to clarify the relationships between spirituality, health locus of control and health self-efficacy. A questionnaire survey was administered to elderly people living at home, and 696 valid responses were collected and analyzed. The subjects\u27 mean age was 74.0±5.2 years. Using a causal model to analyze the relationship between spirituality, health locus of control and health self-efficacy, data fitness to the model was evaluated by structural equation modeling. As a result, the validity of a model in which health locus of control affects health self-efficacy and spirituality while health self-efficacy enhances spirituality was confirmed. However, the nature of the relationship between health locus of control and spirituality and health self-efficacy differed according to the characteristics of health locus of control. In addition, there was a positive correlation between health self-efficacy and spirituality regarding "significance and objectives of life", "harmony with others", "belief", and "union with nature". In order to support for the spirituality of the elderly, the author suggests that strategies to improve the health self-efficacy for basic health control behavior are useful

    カイゴ ジッシュウ シュウリョウジ ニ オケル カイゴ ギジュツ ノ シュウトク ジョウキョウ

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    This study purpose is to examine the acquisition of care skills at the time of all care worker training end. We examined the acquisition of care skills of students from self-evaluation of students, the evaluation of the training leader and the acquisition of care staffs. It was suggested that frequency to experience was related to the acquisition. This study suggested necessity to examine the arrival degree of the care skills item as basic education of the care worker

    Study on Environmental Planning of Street for Improving Amenity)(Study on Environmental Planning of Street for Improving Amenity

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    取得学位:博士(学術),学位授与番号:博乙第122号,学位授与年月日:平成8年3月25日,学位授与年:199

    非交通特性を重視した都市内細街路における快適な街路環境整備計画に関する研究

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    金沢大学工学部研究課題/領域番号:04750511, 研究期間(年度):1992出典:研究課題「非交通特性を重視した都市内細街路における快適な街路環境整備計画に関する研究」課題番号04750511(KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-04750511/)を加工して作
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