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湿式氧化法处理含氰废水——-Tomoya Matsubara,Tadashi Fukum.Eileen C.Bornardo,et al.The 10th APCChE Congress Kitakyusha,Japan,
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作者 李绍全 《工业水处理》 CAS CSCD 北大核心 2005年第7期65-65,共1页
为了提高电镀产品质量,在电镀工艺中大量采用氰化合物。由于氰化合物属剧毒物质。因此在电镀废水排放前需要有效的降解废水中的氰化合物。本研究采用间歇式高压釜研究了含氰废水的湿式氧化处理,并研究了氰化合物的初始浓度、pH、压力... 为了提高电镀产品质量,在电镀工艺中大量采用氰化合物。由于氰化合物属剧毒物质。因此在电镀废水排放前需要有效的降解废水中的氰化合物。本研究采用间歇式高压釜研究了含氰废水的湿式氧化处理,并研究了氰化合物的初始浓度、pH、压力和温度等因素对本工艺降解氰化合物效率的影响。试验在不同温度(383—423K)、压力(0.1—2.0MPa)和初始氰质量浓度(100—5000mg/L)下进行,试验电镀废水样中分别含NaCN和Na,[Cu(CN)4]。结果表明,含NaCN的电镀废水中氰去除率随温度升高而提高,而与压力和氰的初始浓度无关。在温度423K、压力1.0MPa条件下, 展开更多
关键词 湿 japan The AL 湿 NaCN pH
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感应气浮在水处理中的应用——Itideki Tsuge,PanLi,Ohnari Hirofum,The 10th APCChE Congress,Kitakyushu,Japan,
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作者 李绍全 《工业水处理》 CAS CSCD 北大核心 2005年第7期41-41,共1页
开发了一种使用新型微泡发生器的感应气浮技术以替代溶气气浮。在该微泡发生器中,空气能通过喷嘴处旋流的自抽吸、切割作用产生大量的直径为5~30μm的微气泡。为了优化操作条件,采用间歇式感应气浮反应器进行了试验。结果表明,感应... 开发了一种使用新型微泡发生器的感应气浮技术以替代溶气气浮。在该微泡发生器中,空气能通过喷嘴处旋流的自抽吸、切割作用产生大量的直径为5~30μm的微气泡。为了优化操作条件,采用间歇式感应气浮反应器进行了试验。结果表明,感应气浮可以从水中去除低浓度的悬浮颗粒:在很宽的絮凝剂投加剂量和絮凝时间的条件下,都具有很高的处理效率;同时,在较低的空气流速下表现出了较好的颗粒去除率,而较低的水流速度可明显的缩短所需要的气浮时间。 展开更多
关键词 japan The
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An Inquiry into the Approach to Asian Regional Trade Integration Under the Belt and Road Initiative——The Case of the Alignment of a China-Japan-South Korea Free Trade Area
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作者 Bi Ying Yi Xin 《Contemporary Social Sciences》 2019年第4期124-142,共19页
It has been five years since the Belt and Road Initiative (BRI) was first introduced. Though there has been a growing body of literature on regional cooperation between covered countries, Japan and South Korea have be... It has been five years since the Belt and Road Initiative (BRI) was first introduced. Though there has been a growing body of literature on regional cooperation between covered countries, Japan and South Korea have been barely discussed. This paper starts with the consensus-based mechanism of a China-Japan-South Korea Free Trade Area (FTA) to probe the approach of its alignment with the BRI in terms of the sequence of “master plans,”“viability of cooperation,” and “embedding of rules.” This inquiry found that the three countries have a shared interest in cooperation in Central Asia to which China prefers a pragmatic approach, while Japan and South Korea an approach combining idealism with pragmatism. Given the huge potential of cooperation between the trio, it is suggested that a “Central Asia chapter” be incorporated in the negotiation framework of this trilateral FTA, and that the design feature three aspects;fundamental principles, specific rules, and an executive body with a view to functionally contributing to regional trade integration in Asia. This approach may also be applied to the alignment of other Asian areas with the BRI. 展开更多
关键词 BELT and ROAD INITIATIVE (BRI) China-japan-South Korea Free Trade Area (CJK FTA) Arc of Freedom and PROSPERITY (AFP) EURASIA INITIATIVE Central Asia
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Effective use of the Japan Narrow Band Imaging Expert Team classification based on diagnostic performance and confidence level 被引量:6
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作者 Daizen Hirata Hiroshi Kashida +4 位作者 Mineo Iwatate Tomomasa Tochio Akira Teramoto Yasushi Sano Masatoshi Kudo 《World Journal of Clinical Cases》 SCIE 2019年第18期2658-2665,共8页
Five years have passed since the Japan Narrow Band Imaging Expert Team (JNET) classification was proposed in 2014. However, the diagnostic performance of this classification has not yet been established. We conducted ... Five years have passed since the Japan Narrow Band Imaging Expert Team (JNET) classification was proposed in 2014. However, the diagnostic performance of this classification has not yet been established. We conducted a retrospective study and a systematic search of Medical Literature Analysis and Retrieval System On-Line. There were three retrospective single center studies about the diagnostic performance of this classification. In order to clarify this issue, we reviewed our study and three previous studies. This review revealed the diagnostic performance in regards to three important differentiations.(1) Neoplasia from non-neoplasia;(2) malignant neoplasia from benign neoplasia;and (3) deep submucosal invasive cancer (D-SMC) from other neoplasia. The sensitivity in differentiating neoplasia from non-neoplasia was 98.1%-99.8%. The specificity in differentiating malignant neoplasia from benign neoplasia was 84.7%-98.2% and the specificity in the differentiation D-SMC from other neoplasia was 99.8%-100.0%. This classification would enable endoscopists to identify almost all neoplasia, to appropriately determine whether to perform en bloc resection or not, and to avoid unnecessary surgery. This article is the first review about the diagnostic performance of the JNET classification. Previous reports about the diagnostic performance have all been retrospective single center studies. A large-scale prospective multicenter evaluation study is awaited for the validation. 展开更多
关键词 japan Narrow Band IMAGING EXPERT TEAM CLASSIFICATIon Magnifying endoscopy NARROW-BAND IMAGING Validation Diagnostic performance Colonoscopy Colorectal neoplasms
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China-Central Asia Power Cooperation Outlook
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作者 Luo Jinshan State Power Economic Research Institute 《Electricity》 2010年第3期20-22,共3页
After analyzing the basic information,distribution of energy resources and condition of power industry in Central Asia,the high feasibility for China to cooperate closely with Central Asia in transnational power inter... After analyzing the basic information,distribution of energy resources and condition of power industry in Central Asia,the high feasibility for China to cooperate closely with Central Asia in transnational power interconnection,power investment and technology exchanges,etc.is studied.Furthermore,the forms,mechanisms,existing problems and suggestions for the improvement of current policies related to the power cooperation are proposed. 展开更多
关键词 outlook COOPERATIon Central ASIA POWER industry energy RESOURCES INTERConNECTIon suggestions information COOPERATIon technology analyzing problems related China high
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New energy policy and low-carbon society in Japan after the Great East Japan Earthquake
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作者 Ryuji Matsuhashi Kae Takase +1 位作者 Koichi Yamada Hiroshi Komiyama 《Chinese Journal of Population,Resources and Environment》 2013年第1期62-68,共7页
The Great East Japan Earthquake in March 2011 devastated the eastern region of Japan.Due to the resulting nuclear accident,Japanese Cabinet decided to revise its energy policies.The Energy and Environment Council in N... The Great East Japan Earthquake in March 2011 devastated the eastern region of Japan.Due to the resulting nuclear accident,Japanese Cabinet decided to revise its energy policies.The Energy and Environment Council in National Policy Unit published options on the nation's scenarios for energy and economy in 2030.We estimated the economic impacts of the options to national economy and households in 2030.Finally,we clarified significant factors to establish a secure,affluent and low-carbon society based on the energy scenarios. 展开更多
关键词 GREAT East japan Earthquake ENERGY scenarios the ENERGY and Environment COUNCIL Affluent Low-carbon SOCIETY CO<sub>2</sub> emissions
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Differences in Self-Assessment Regarding Eating Behaviors among Female University Students Living in Japan, Korea, and Austria
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作者 Mihoko Tominaga Masanori Taguchi +5 位作者 Akiko Suzuki Yoshiko Ikawa Ho-Sook Youn Kyubok Cho Johannes Scherling Roswith Roth 《Food and Nutrition Sciences》 2012年第12期1673-1681,共9页
Objective: To investigate cross-cultural differences in self-assessments of eating behaviors of female university students who bear responsibility for their own eating behaviors and who will, in the future, likely det... Objective: To investigate cross-cultural differences in self-assessments of eating behaviors of female university students who bear responsibility for their own eating behaviors and who will, in the future, likely determine a family’s eating style. Design: A cross-cultural comparison. Setting: Japan, South Korea, and Austria. Subjects: Female university students from Japan (n = 276), Korea (n = 103), and Austria (n = 127). The survey comprised a questionnaire containing ten sections about eating behaviors (eating habits, regular meal times, and frequency of food intake) and eating attitudes. Results: Eating behaviors and attitudes differed significantly among the three cultures. Japanese students practiced healthier eating behaviors than did Korean and Austrian students, on the basis of their variety of food intake and regular consumption of three meals, but rated themselves lower on healthy eating behaviors. Austrian students tended to have more independent attitudes toward eating and food preparation (e.g., “I want to eat only my favorite dishes”) than Japanese or Korean students. Conclusions: Effects of cultural differences in psychological processes, such as self-cognition, emotion, motivation, and values, on self-assessment of eating behaviors is suggested. 展开更多
关键词 DIFFERENCES in SELF-ASSESSMENT Regarding Eating Behaviors AMonG Female University STUDENTS LIVING in japan Korea and Austria
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Analysis on Predominant Periods Distribution by Microtremor Observations for Seismic Disaster Prevention in Yokohama, Japan Using GIS 被引量:1
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作者 Tsutomu Ochiai Takahisa Enomoto 《Journal of Geographic Information System》 2019年第5期579-594,共16页
In recent years, predictions of damage from earthquakes have been made on a prefectural scale, and expectations exist that more detailed damage forecasts should be made even on a city/town/village scale. It is importa... In recent years, predictions of damage from earthquakes have been made on a prefectural scale, and expectations exist that more detailed damage forecasts should be made even on a city/town/village scale. It is important to know detailed ground characteristics to do damage prediction on a fine scale. Using GIS is the best way to communicate this planar disaster prevention information to the general public. Yokohama City is the second largest city in Japan and developed as part of the capital region of Metropolitan Tokyo. Recently, the population of this city has reached about 3,000,000, and economic and cultural facilities, social infrastructure, and residential complexes are concentrated in this city. The capital region, including Yokohama City, was attacked by the 1923 Great Kanto Earthquake (M7.9) and Yokohama City was devastated by this earthquake. From the research so far, it is known that the H/V spectrum obtained from microtremor observation has a good correlation with the ground characteristics. The authors have been conducting high-density tremor observations that have been ongoing since the 1990s, mainly in Kanagawa Prefecture, Japan. Here, we have organized the predominant periods obtained from the observation results for Yokohama City. The entirety of Yokohama City was divided into 250 m × 250 m meshes and their centers were used as microtremor observation sites. Excluding sites that could not be used due to geographical conditions, observations were made at approximately 5700 sites. So, we compared the data obtained separately, such as the period, terrain classification, and amplification characteristics. The distribution maps of predominant periods in Yokohama City show that the city contains a lot of artificially transformed land, and consequently, the distribution of predominant periods is not uniform. However, it can be seen that the periods become gradually longer, moving from the higher elevation eastern part toward the lower elevation western part. Investigation of the site amplification factors and detailed topographical classifications indicates a clear correlation with the predominant period distribution. 展开更多
关键词 Microtoremor DISTRIBUTIon of Predominant PERIODS H/V SPECTRAL RATIO GROUND Motion Characteristics Yokohama City of japan
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Financial literacy,behavioral traits,and ePayment adoption and usage in Japan
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作者 Trinh Quang Long Peter J.Morgan Naoyuki Yoshino 《Financial Innovation》 2023年第1期2620-2649,共30页
This study investigates how financial literacy and behavioral traits affect the adoption of electronic payment(ePayment)services in Japan.We construct a financial literacy index using a representative sample of 25,000... This study investigates how financial literacy and behavioral traits affect the adoption of electronic payment(ePayment)services in Japan.We construct a financial literacy index using a representative sample of 25,000 individuals from the Bank of Japan’s 2019 Financial Literacy Survey.We then analyze the relationship between this index and the extensive and intensive usage of two types of payment services:electronic money(e-money)and mobile payment apps.Using an instrumental variable approach,we find that higher financial literacy is positively associated with a higher likelihood of adopting ePayment services.The empirical results suggest that individuals with higher financial literacy use payment services more frequently.We also find that risk-averse people are less likely to adopt and use ePayment services,whereas people with herd behavior tend to adopt and use ePayment services more.Our empirical results also suggest that the effects of financial literacy on the adoption and use of ePayment differ among people with different behavioral traits. 展开更多
关键词 Financial literacy Financial literacy heterogeneity Herd behavior Risk aversion ePayment adoption ePayment usage Electronic money Mobile payment app japan
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A Study on Japanese Traditional Rice Production Technique in Warm Areas and Its Modern Ecological Value
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作者 Lei YE Lulu QIAN 《Asian Agricultural Research》 2019年第1期38-41,共4页
Japanese traditional rice production technique features " sparse seeding,long cultivation,scattered planting and limited transplanting",and scientific rice production methods of deep plowing,fertilization,we... Japanese traditional rice production technique features " sparse seeding,long cultivation,scattered planting and limited transplanting",and scientific rice production methods of deep plowing,fertilization,weeding,irrigation and drainage are employed.This technique has reversed the common practice of " dense seeding and planting" in rice paddies and changed the history of growing rice spikes purely out of stems,thus enabling stable and high yields of several tillering grain crops including rice.The technique can provide a useful reference for developing modern rice production in warm areas. 展开更多
关键词 japan TRADITIonAL rice production TECHNIQUE in WARM areas SPARSE SEEDING and PLANTING Nougyou Zitoku
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Cost-profit analysis for Japan-Russia and Japan-South Korea interconnectors 被引量:4
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作者 Seiichiro Kimura Shota Ichimura 《Global Energy Interconnection》 2019年第2期114-121,共8页
This paper describes the results of cost-profit analysis related to interconnectors for Japan-Russia and JapanSouth Korea based on the Asia International Grid Connection Study Group 2^(nd) report. The Group has been e... This paper describes the results of cost-profit analysis related to interconnectors for Japan-Russia and JapanSouth Korea based on the Asia International Grid Connection Study Group 2^(nd) report. The Group has been established in 2016 for conducting research on international electric power networks in Asia from the viewpoint of technology, investment and legal framework. 2^(nd) report of the Group was published in June 2018, examining the profitability of an interconnectors between Japan and neighboring countries. The Group has calculated expected profit from operation of these interconnectors.The Group has categorized interconnector business into four models from the survey of preceding and current business on grids and interconnectors. To clarify profitability, expected internal rate of return(IRR) was calculated for each business model based on estimated investment cost for each route. When interconnector is dedicated to specific power plants or suppliers and electricity can be sold at Japan wholesale market at 2016-2017 price level, positive IRR levels are expected in case that Free on Board(FOB) price lower than 7 JPY/kWh. When the investment will be covered by electricity tariff by final consumers, tariff for consumers will just slightly increase by approximately 0.1 JPY/kWh. 展开更多
关键词 Interconnector Cost-profit analysis Internal Rate of RETURN Business model japan RUSSIA SOUTH Korea
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Comparison on the Origin and Development of Sophora flavescens in China and Japan
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作者 Jing YAN Zheng FAN +2 位作者 Yuling XU Chenyu ZHOU Rongchun HAN 《Agricultural Biotechnology》 2024年第2期58-63,共6页
Sophora flavescens , which was first recorded in Shen Nong s Herbal Classic , has the functions of clearing away heat, drying dampness, killing parasites and promoting urination. In its long-term application, traditio... Sophora flavescens , which was first recorded in Shen Nong s Herbal Classic , has the functions of clearing away heat, drying dampness, killing parasites and promoting urination. In its long-term application, traditional Chinese medicine has gradually deepened its understanding of the origin and efficacy of S. flavescens . In order to explore changes in the origin and efficacy of traditional Chinese herb S. flavescens in the history of China and Japan, in this paper, the origin and development of S. flavescens in China and Japan were compared from three aspects: the origin, medicinal efficacy, and processing methods of S. flavescens in China and Japan, hoping to provide clear understanding of the medicinal plant S. flavescens . 展开更多
关键词 Sophora flavescens japan Herbalogical study PROCESSING
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CAFIU holds a Seminar on Japanese Economic Outlook and China-Japan Economic Relations
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作者 Wang Bo 《International Understanding》 2015年第2期45-46,共2页
On April 24,the Chinese Association for International Understanding(CAFIU) and Japan-China Economic Association Beijing Office jointly held the Second Seminar on Japanese Economic Outlook and China-Japan Economic Rela... On April 24,the Chinese Association for International Understanding(CAFIU) and Japan-China Economic Association Beijing Office jointly held the Second Seminar on Japanese Economic Outlook and China-Japan Economic Relations at Wanshou Hotel in Beijing.Kiyoyuki Seguchi, 展开更多
关键词 outlook japanESE SEMINAR holds jointly HOTEL SEMINAR companies DEEPENING EXCHANGES
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Application of appropriate use criteria for percutaneous coronary intervention in Japan
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作者 Taku Inohara Shun Kohsaka +5 位作者 Ikuko Ueda Takashi Yagi Yohei Numasawa Masahiro Suzuki Yuichiro Maekawa Keiichi Fukuda 《World Journal of Cardiology》 CAS 2016年第8期456-463,共8页
The aim of this review was to summarize the concept of appropriate use criteria(AUC) regarding percutaneous coronary intervention(PCI) and document AUC use and impact on clinical practice in Japan, in comparison with ... The aim of this review was to summarize the concept of appropriate use criteria(AUC) regarding percutaneous coronary intervention(PCI) and document AUC use and impact on clinical practice in Japan, in comparison with its application in the United States. AUC were originally developed to subjectively evaluate the indications and performance of various diagnostic and therapeutic modalities, including revascularization techniques. Over the years, application of AUC has significantly impacted patient selection for PCI in the United States, particularly in non-acute settings. After the broad implementation of AUC in 2009, the rate of inappropriate PCI decreased by half by 2014. The effect was further accentuated by incorporation of financial incentives(e.g., restriction of reimbursement for inappropriate procedures). On the other hand, when the United States-derived AUC were applied to Japanese patients undergoing elective PCI from 2008 to 2013, about one-third were classified as inappropriate, largely due to the perception gap between American and Japanese experts. For example, PCI for low-risk non-left atrial ascending artery lesion was more likely to be classified as appropriate by Japanese standards, and anatomical imaging with coronary computed tomography angiography was used relatively frequently in Japan, but no scenario within the current AUC includes this modality. To extrapolate the current AUC to Japan or any other region outside of the United States, these local discrepancies must be taken into consideration, and scenarios should be revised to reflect contemporary practice. Understanding the concept of AUC as well as its perception gap between different counties will result in the broader implementation of AUC, and lead to the quality improvement of patients' care in the field of coronary intervention. 展开更多
关键词 Appropriate use CRITERIA Acute CORonARY syndrome PERCUTANEOUS CORonARY intervention japan Stable ISCHEMIC heart disease
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The accumulation characteristics and exploration potential of oil and gas in the back-arc basin of Japan under the background of high heat flow
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作者 Jian-qiang Wang Jie Liang +10 位作者 Jian-wen Chen Qing-fang Zhao Yin-guo Zhang Jian-wei Zhang Sen Li Chang-qing Yang Jian Zhang Jing Sun Chuan-sheng Yang Yong Yuan Lee-Jel Jiang 《China Geology》 CAS CSCD 2023年第4期660-675,共16页
The Sea of Japan is located in the southeast margin of Eurasia, in the triangle area of the western Pacific Ocean. Due to the interaction of the Pacific plate, Eurasian plate and Philippine plate, its tectonic environ... The Sea of Japan is located in the southeast margin of Eurasia, in the triangle area of the western Pacific Ocean. Due to the interaction of the Pacific plate, Eurasian plate and Philippine plate, its tectonic environment is complex, forming a typical trench-arc-basin system. At present, 148 oil and gas fields have been discovered in Japan, with an oil and gas resource of 255.78×10^(6) t, showing a good prospect for oil and gas exploration. Based on the previous research and the recently collected geological and geophysical data, the characteristics of tectonic-sedimentary evolution and geothermal field in the basins around the Sea of Japan are analyzed. The results show that the tectonic evolution of the basin is mainly controlled by plate subduction and back-arc oceanic crust expansion, and it mainly undergone four tectonic-sedimentary evolution stages: Subduction period, basin development period, subsidence period and compression deformation period. The overall heat flow value of Japan Sea is high, and it is distributed annularly along Yamato Ridge. The geothermal heat flow value is about 50–130 MW/m^(2), and the average heat flow is75.9±19.8 MW/m^(2), which has a typical “hot basin ”. The high heat flow background provides unique thermal evolution conditions for hydrocarbon generation, which leads to the high temperature and rapid evolution. The authors summarized as “early hydrocarbon generation, rapid maturity and shallow and narrow hydrocarbon generation window”. The type of oil and gas is mainly natural gas, and it mainly distributed in Neogene oil and gas reservoirs. The trap types are mainly structural traps, lithologic traps and composite traps. In addition, the pre-Neogene bedrock oil and gas reservoirs also show a good exploration prospect. The resource prospecting indicates that Niigata Basin, Ulleung Basin and kitakami Basin are the main target areas for future exploration and development. 展开更多
关键词 Oil and gas Hydrocarbon generation capacity Back-arc basin Geothermal field Tectono-sedimentary evolution Hydrocarbon accumulation The Sea of japan Western Pacific
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Factors Affecting the Perception of Family Functioning among Couples in Child-Rearing Japanese Families 被引量:1
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作者 Junko Honda Yuuri Nakai +1 位作者 Shota Kakazu Naohiro Hohashi 《Open Journal of Nursing》 2015年第5期407-415,共9页
In family healthcare nursing, the family system unit (i.e., a group in which the members, seen as a whole, mutually interact) is the target of care. As nurses tend to obtain family-related information from particular ... In family healthcare nursing, the family system unit (i.e., a group in which the members, seen as a whole, mutually interact) is the target of care. As nurses tend to obtain family-related information from particular family members in the clinical setting, when assessing families, they often confront the issue of the differences between the theoretical level and methodological level. Although this issue needs resolving for evidence-based family nursing practice, sufficient research is lacking on the methodology related to family assessment. The present study aimed to clarify the factors that affected evaluation of family functioning among couples. Semi-structured interviews were conducted with 10 child-rearing families (couples) using the Survey of Family Environment (SFE) as a family functioning scale. Content analysis identified 12 factors that affected discrepancies in the couples’ evaluations and eight factors that affected agreement in those evaluations. These factors were classified into three categories: factors concerning family or family members;factors concerning questions related to the SFE;and factors concerning the view of the family as a whole. The results of this study should contribute to the development of family assessment tools and effective methods for evaluation of family care. 展开更多
关键词 FAMILY FUNCTIonING DISCREPANCY Survey of FAMILY ENVIRonMENT (SFE) japan Concentric Sphere FAMILY ENVIRonMENT Theory (CSFET)
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Study on the Authenticity of Heritage in Japan by Kinkakuji
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作者 GU Guangcan XIE Ninggao 《Journal of Landscape Research》 2013年第Z2期18-20,共3页
The authenticity of world heritage is very important but the definition is not clear.Japan became a member of the World Heritage Committee only in 1992,but has contributed greatly to the explanation of authenticity,an... The authenticity of world heritage is very important but the definition is not clear.Japan became a member of the World Heritage Committee only in 1992,but has contributed greatly to the explanation of authenticity,and cultural diversity of the world.Taking Kinkakuj(or Rokuon-ji,or Temple of the Golden Pavilion)for example,the paper attempts to clarify the connotations of authenticity in heritage protection by reviewing its world heritage application document(1993)and Nara Document(1994),so as to instruct heritagerelated practices. 展开更多
关键词 LANDSCAPE architecture the World HERITAGE japan Kinkakuji REConSTRUCTIon Nara ConFERENCE on AUTHENTICITY
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Evolution History of Gassan Volcano, Northeast Japan Arc
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作者 Ryo Oizumi Masao Ban Naoyoshi Iwata 《Open Journal of Geology》 2018年第7期647-661,共15页
Evolution history of the volcano is essential not only to characterize the volcano, but also consider magma genesis beneath the volcano. Most of the stratovolcanoes in northeast Japan follow a general evolutional cour... Evolution history of the volcano is essential not only to characterize the volcano, but also consider magma genesis beneath the volcano. Most of the stratovolcanoes in northeast Japan follow a general evolutional course: cone building, horse-shoe shaped caldera forming collapse, and post-caldera stages. However, the detailed history of each stage is not well investigated. We investigated evolution history of young edifice of Gassan volcano, representative stratovolcano in rear side of northeast Japan arc. Most of the products are lavas, which are divided into two groups by geomorphologic and geologic features. The former (Gassan lower lavas) is composed of relatively thin and fluidal lavas, whose original geomorphology remains a little, while the latter (Gassan upper lavas) is composed of relatively thick and viscous lavas, whose original geomorphology is moderately preserved. Based on geologic features, the upper lavas can be further divided into Gassan upper north lavas and upper summit lavas in ascending order. After the formation of the thick lavas, horse-shoe shaped caldera was formed by the instability of the edifice, probably triggered by fault activity. No evidence of post caldera activity inner part of it is observed. Based on K-Ar data, estimated age of Gassan lower lavas is ca. 0.75 to ca. 0.6 Ma, those of Gassan upper north and upper summit lavas are ca. 0.60 to ca. 0.55 Ma and ca. 0.55 to ca. 0.45 Ma. The eruption rate is estimated to be ca. 0.0004 km3/1000 years in Gassan lower lavas and ca. 0.02 km3/1000 years in Gassan upper summit lavas. These values are lower than the eruption rate of representative Japanese stratovolcanoes. 展开更多
关键词 STRATOVOLCANO Andesitic LAVA Evolution History Gassan VOLCANO NE japan K-AR Age DATING
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Route designs and cost estimation for Japan-Russia and Japan-South Korea interconnections 被引量:3
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作者 Shota Ichimura Ryo Omatsu 《Global Energy Interconnection》 2019年第2期133-142,共10页
This paper describes route designs and cost estimation for possible interconnections between Japan-Russia and between Japan-South Korea based on the Asia International Grid Connection Study Group 2^(nd) report. The Gr... This paper describes route designs and cost estimation for possible interconnections between Japan-Russia and between Japan-South Korea based on the Asia International Grid Connection Study Group 2^(nd) report. The Group has conducted a desktop study to design several cable routes as possible options. To optimize the route, the group studied a wide range of open data, regarding sea depth, fishery zones, geographic condition, available transmission capacity in connecting points inside Japan and so on. The result of desktop study shows that it is possible to keep sea depth for planned routes less than 300 m and length for most of designed routes is less than 600 km. Compare to existing undersea cables in Europe, proposed routes are not challenging from technical and geological viewpoints.The study shows that investment cost range, including cost for grid enhancement inside Japan, is from around 200 bn JPY to 600 bn JPY, depending on the routes. Annualized cost range is from around 8 to 24 bn JPY(for 25-year operation), which is not so large compare to 1800 bn JPY-average annual investment in transmission infrastructure by 10 power utilities in the past 23 years. 展开更多
关键词 Interconnector Undersea CABLE Grid CABLE Route AC/DC Converter japan RUSSIA South Korea.
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Pre-seismic and Co-seismic Crustal Movements of the M 7.3 Kyushu Earthquake on April 16,2016 in Japan 被引量:3
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作者 Gu Guohua Wang Wuxing 《Earthquake Research in China》 CSCD 2017年第4期589-600,共12页
The time series of coordinates of a large number of GPS stations in the world,processed by Prof. Geoffrey Blewitt with GIPSY software are available at http://geodesy. unr. edu.Based on the time series of coordinates i... The time series of coordinates of a large number of GPS stations in the world,processed by Prof. Geoffrey Blewitt with GIPSY software are available at http://geodesy. unr. edu.Based on the time series of coordinates in the global reference frame of IGS08 at more than250 stations of continuous GPS observations,downloaded from the website,the co-seismic displacements of the M7. 3 Kyushu earthquake on April 16,2016 in Japan and the preseismic strain accumulations and displacements in the regional reference frame were obtained. The station of continuous GPS observation at BJFS near Beijing has been quite stable in displacement in the eastern part of China for more than 17 years since the beginning of its operation,and this station is used as the core station in the regional reference frame for the pre-seismic displacement of the Kyushu earthquake of M7. 3. The main feature of the pre-seismic displacements of the Kyushu earthquake is characterized by locking in the crust at and near the epicenter. The anomalous pre-seismic strain accumulation developed in an area of anomalous accumulation of the shear strain component of γ1 on the northeast side of the epicenter,with increasing size of the area and increasing magnitude in γ1. The largest area covered by the anomalous γ1 is about 2000 km2. The change in the E component at BJFS since November 26,2015 was caused by the replacement of the receiver and the antenna at the station. In order to study the shortterm change in displacements at stations at and near the epicenter,the time series at 3 stations with continuous GPS observations,2 at SUWN and DAEJ in south Korea and 1 at BJSH near Beijing were analyzed. The analysis shows that the displacements at the 3 stations have been quite stable in the same manner in east Asia. Thus,BJSH is used as the core station in the regional reference frame of displacement and the displacement time series show that there were no significant short term anomalies before the earthquake. 展开更多
关键词 GPS GNSS co-seismic displacement 2016M7.3 KYUSHU EARTHQUAKE in japan EARTHQUAKE precursor EARTHQUAKE prediction
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