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Groundwater monitoring of an open-pit limestone quarry:Water-rock interaction and mixing estimation within the rock layers by geochemical and statistical analyses

引用

International Journal of Mining Science and Technology 2018年第6期28卷 849-857页

作者： Khy Eam Eang Toshifumi Igarashi megumi kondo Tsurugi Nakatani Carlito Baltazar Tabelin Ryota Fujinaga Laboratory of Groundwater and Mass Transport Division of Sustainable Resources EngineeringGraduate School of EngineeringHokkaido UniversitySapporo 060-8628Japan Laboratory of Groundwater and Mass Transport Division of Sustainable Resources EngineeringFaculty of EngineeringHokkaido UniversitySapporo 060-8628Japan Mitsubishi Materials Corporation Tokyo 1008117Japan Ryoko Lime Industry Co. Ltd.Chichibu-gunSaitama 3680072Japan Laboratory of Mineral Processing and Resources Recycling Division of Sustainable Resources EngineeringFaculty of EngineeringHokkaido UniversitySapporo 0608628Japan

Water-rock interaction and groundwater mixing are important phenomena in understanding hydrogeological systems and the stability of rock slopes especially those consisting largely of moderately watersoluble minerals like calcite. In this study, the hydrogeological and geochemical evolutions of groundwater in a limestone quarry composed of three strata: limestone layer(covering), interbedded layer under the covering layer, and slaty greenstone layer(basement) were investigated. Water-rock interaction in the open-pit limestone quarry was evaluated using PHREEQC, while hierarchical cluster analysis(HCA)and principal component analysis(PCA) were used to classify and identify water sources responsible for possible groundwater mixing within rock layers. In addition, Geochemist's Workbench was applied to estimate the mixing fractions to clarify sensitive zones that may affect rock slope stability. The results showed that the changes in Ca2+and HCO3àconcentrations of several groundwater samples along the interbedded layer could be attributed to mixing groundwater from the limestone layer and that from slaty greenstone layer. Based on the HCA and PCA results, groundwaters were classified into several types depending on their origin:(1) groundwater from the limestone layer(LO),(2) mixed groundwater flowing along the interbedded layer(e.g., groundwater samples L-7, L-11, S-3 and S-4), and(3) groundwater originating from the slaty greenstone layer(SO). The mixing fractions of 41% LO: 59% SO, 64% LO: 36% SO, 43%LO: 57% SOand 25% LO: 75% SOon the normal days corresponded to groundwaters L-7, L-11, S-3 and S-4,respectively, while the mixing fractions of groundwaters L-7 and L-11(61% LO: 39% SOand 93% LO: 7% SO,respectively) on rainy days became the majority of groundwater originating from the limestone *** indicate that groundwater along the interbedded layer significantly affected the stability of rock slopes by enlarging multi-breaking zones in the layer through calcite

关键词： Water-rock interaction Groundwater mixing Interbedded layer Geochemist’s workbench Rock slope stability

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Identifying bereaved grievers with greatest medical or social service needs in Japan

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Family Medicine and Community Health 2022年第1期10卷 1-9页

作者： Carl Becker Yozo Taniyama megumi kondo-Arita Noriko Sasaki Shinya Yamada Kayoko Yamamoto Policy Science Unit School of MedicineKyoto UniversityKyotoJapan Department of Religious Studies Tohoku UniversitySendaiJapan Nakayama International Center Osaka Medical CollegeTakatsukiJapan Department of Healthcare Economics and Quality Management Graduate School of MedicineKyoto UniversityKyotoJapan Department of Ethnology National Museum of Japanese HistorySakuraJapan Department of Nursing Tenri Health Care UniversityTenriJapan

Objective Severe grief adversely affects the health of bereaved families,potentially burdening medical and community health *** for effective community health maintenance must identify the people likely to face severe effects of *** present study identified characteristics of mourners who experience severe grief within a year of bereavement to confirm whether this grief increased their reliance on Japanese medical and social *** We conducted a nationwide postal survey of Japanese bereaved within the previous year,to compare those reporting daily or overwhelming‘heavy’grief to those with less heavy grief,in terms of demographic and socioeconomic details,daily work and non-work activity,frequency of medical and social service ***/participants In 2019,with the support of the Ministry of Education and the All Japan Funeral Co-Operation,we distributed approximately 5500 questionnaires to Japanese who had presided at funerals within the past year for anonymous *** January of 2020,we received 1078 complete voluntary responses from bereaved *** Half of the‘heavy grief’group(n=143)reported adverse effects on health and daily life,including needs for pharmacological,medical or welfare *** of husbands or children were particularly connected to severe grief;‘unexpected’death from cancer caused the greatest ***(even part-time)buffered against severe grief;grief was greater for the unemployed and substantially worse for those who lost significant income at the same time as they lost loved *** These findings suggest that prior counselling should reduce the shock of bereavement and economic loss,which increases subsequent medical *** professionals and community health workers can use the above factors to target in advance the family members in greatest danger of heavy grief,to intervene lest grief adversely affect their physical and psychological health after ber

关键词： service sided return

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在膳食诱导的肥胖小鼠中,硝苯地平改善缺血引起的血管重建过程

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中华高血压杂志 2012年第6期20卷 598-598页

作者： Tetsutaro Kito Rei Shibata megumi kondo Takashi Yamamoto Hirohiko Suzuki Masakazu Ishii Toyoaki Murohara 罗冬梅叶鹏

肥胖是心血管疾病的危险因素之一，与血管功能受损相关。硝苯地平作为钙拮抗剂的一种，有许多除了降低血压以外的功能，如改善内皮细胞功能，降低氧化应激。

关键词：肥胖小鼠血管重建硝苯地平膳食诱导缺血内皮细胞功能心血管疾病危险因素

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