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Element and mineral characterization of dust emission from the saline land at Songnen Plain, Northeastern China

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Journal of Environmental Sciences 2009年第10期21卷 1363-1370页

作者： CHEN Bing kitagawa hiroyuki HU Ke JIE Dongmei YANG Junpeng LI Jingmin Department of Hydrospheric-Atmospheric Sciences Graduate School of Environmental Studies Nagoya University Nagoya 464-8601 Japan. Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China College of Earth Sciences Jilin University Changchun 130061 China School of Marine Science China University of Geosciences Beijing 100038 China College of Urban and Environmental Sciences Northeast Normal University Changchan 130024 China

Recent observations of Asian dust storms show an eastern expansion of the source area to degraded lands, where dust emissions have been little studied. The dust concentrations over the saline land of the western Songnen Plain （SSL）, Northeastern China, are circumstantially higher than those from the northwestern Chinese deserts. These concentrations are sensitive to the surface soil conditions and wind velocity on the ground. The dust samples collected during dust storm events on the SSL contain abundant Na, Mg, A1, K, Ca, Fe and Ti, as well as toxic elements such as Cu, V, Zn and Ba. Individual particle analysis reveals that fine saline particles （〈 10 μm in diameter） on the saline land, consisting largely of carbonate, halite and sulfate together with lithogenic minerals such as SiO2 and aluminosilicate, are eventually uplifted during the interval from spring to autuum. The predominantly fine saline particles uplifted from the SSL are likely transported eastward by the winter monsoon circulation and westerlies. Recent degradation of saline lands in Northeastern China would not only increase the frequency of dust storm events in the downwind area, but also might change the chemical composition of the Asian dust emissions.

关键词： element geochemistry individual particle analysis Asian dust dust storm saline soil land degradation

Co-occurrence prediction in a large location-based social network

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Frontiers of Computer Science 2013年第2期7卷 185-194页

作者： Rong-Hua LI Jianquan LIU Jeffrey Xu YU Hanxiong CHEN hiroyuki kitagawa Department of System Engineering and Engineering Management The Chinese University of Hong Kong Hong Kong China Faculty of Engineering Information and systems University of TsukubaJapan Ibaraki 305-8577 Cloud System Research Laboratories NEC CorporationJapan Tokyo 108-8001

Location-based social network （LBSN） is at the forefront of emerging trends in social network services （SNS） since the users in LBSN are allowed to ＂check-in＂ the places （locations） when they visit them. The accurate geographi- cal and temporal information of these check-in actions are provided by the end-user GPS-enabled mobile devices, and recorded by the LBSN system. In this paper, we analyze and mine a big LBSN data, Gowalla, collected by us. First, we investigate the relationship between the spatio-temporal co- occurrences and social ties, and the results show that the co- occurrences are strongly correlative with the social ties. Sec- ond, we present a study of predicting two users whether or not they will meet （co-occur） at a place in a given future time, by exploring their check-in habits. In particular, we first intro- duce two new concepts, bag-of-location and bag-of-time-lag, to characterize user＇s check-in habits. Based on such bag rep- resentations, we define a similarity metric called habits sim- ilarity to measure the similarity between two users＇ check-in habits. Then we propose a machine !earning formula for pre- dicting co-occurrence based on the social ties and habits sim- ilarities. Finally, we conduct extensive experiments on our dataset, and the results demonstrate the effectiveness of the proposed method.

关键词： location-based social networks Gowalla co-occurrence

Dust incorporation from areas under the pathway of Asian dust transport traced from stable isotopes of carbonate particles

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Dust incorporation from areas under the pathway of Asian dus...

第十届全国气溶胶会议暨第六届海峡两岸气溶胶技术研讨会

作者： hiroyuki kitagawa Department of Earth and Environmental Sciences Graduate School of Environmental StudiesNagoya University

Dust emission from the arid and semiarid areas in northwestern China such as the Gobi Deserts and Taklimakan Desert（hereafter,mentioned as Asian dust） is transported by the westerlies and the winter monsoon winds to Korea,Japan and the Pacific,even across the Pacific to the United States and Canada（Liu and Diamond,2005）.The Asian dust alters the chemical functions of the atmosphere（Sokolik and Toon,1996;Husar et al.,2001）,cloud physical process（Isono et al.,1959;Yin et al.,2002） and the biogeochemical process in Northwestern Pacific（Zhuang et al.,1992;Mahowald et al.,2005）.The Asian dust events,accompanying with increasing concentration and decreasing visibility in the atmosphere intensively,cause seriously social and economic problems at the downwind mega-cities.

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松嫩平原西部碱尘气溶胶的元素特征分析

吉林大学学报（地球科学版） 2006年第3期36卷 417-423页

作者：胡克陈兵 hiroyuki kitagawa 介冬梅赵奎涛中国地质大学海洋学院北京100083 吉林大学地球科学学院长春130061 名古屋大学环境科学研究所东北师范大学城市与环境科学学院长春130024

碱尘暴期间松嫩平原西部碱尘气溶胶的主要元素质量浓度排序为Na、Al、Fe、Ca、Mg、K、Ti、Ba、Zn，与当地盐碱化土壤的元素组成吻合，而与沙尘、城市气溶胶的元素组成有差别。风力对碱尘气溶胶元素组成有明显的影响，当风速在8．0～17... 详细信息

碱尘暴期间松嫩平原西部碱尘气溶胶的主要元素质量浓度排序为Na、Al、Fe、Ca、Mg、K、Ti、Ba、Zn，与当地盐碱化土壤的元素组成吻合，而与沙尘、城市气溶胶的元素组成有差别。风力对碱尘气溶胶元素组成有明显的影响，当风速在8．0～17．1m／s时，元素组成的质量浓度排序为Na、Ca、Al、Fe、Mg、K、Ba、Ti、Zn。Na元素质量浓度的激增是碱尘暴元素组分的一大特征，明显富集元素为Na和B；相对于当地背景大气气溶胶的富集情况，Zn、Cu、Ba、B的富集因子值在碱尘暴期间明显降低；在各种天气情况下，B、Cu均具有较高的富集因子。碱尘中Ti元素的富集因子值均小于1，而Ca、Fe、K、Mg、Mn、Sr、V的富集因子值为1～4。两个采样点的Ca、Na、Al、Fe、Mg、Ti、Zn的富集因子近似，表明该区碱尘的主要元素具有特定的一致性；而B、Ba、Cu、V的富集因子相差较大，可以作为区分不同碱尘源的标志性元素。

关键词：松嫩平原碱尘气溶胶元素组成富集因子

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吉林西部碱尘的通量与物质特征分析

生态环境 2004年第2期13卷 191-193页

作者：陈兵胡克介冬梅 hiroyuki kitagawa 吉林大学地球科学学院东北师范大学城市与环境科学学院吉林大学地球科学学院吉林长春130061 日本名古屋大学大气水圈研究中心

选择吉林西部两个典型地区,抽样采集碱尘样品,根据实测结果对日常形成的碱尘进行了通量测定;依据两个采样点的自然地理状况和实测采样记录,提出了吉林西部碱尘具有两种源区类型的认识,即以大布苏湖为代表的萎缩湖泡型和以姜家甸草场为... 详细信息

选择吉林西部两个典型地区,抽样采集碱尘样品,根据实测结果对日常形成的碱尘进行了通量测定;依据两个采样点的自然地理状况和实测采样记录,提出了吉林西部碱尘具有两种源区类型的认识,即以大布苏湖为代表的萎缩湖泡型和以姜家甸草场为代表的草场退化型。同时,通过对比分析不同时间和采样点的碱尘通量及源区特征,提出了吉林西部碱尘通量与风力条件、日照条件、pH值、物理性粘粒比例正相关,与植被覆盖度、地表物质粒级负相关。对碱尘元素分析结果表明,Ca、Na元素含量明显偏高,Fe、Al元素含量变化则较大;碱尘组成元素含量由多到少的顺序为:Ca、Na、Fe、Al、K、Mg、Ti,与普通尘暴元素组成有着明显的差别。

关键词：吉林西部碱尘通量特征分析

Effect of Daikenchuto (TJ-100) on abdominal bloating in hepatectomized patients

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World Journal of Gastrointestinal Surgery 2013年第4期5卷 115-122页

作者： Kazuhiro Hanazaki Kengo Ichikawa Masaya Munekage hiroyuki kitagawa Ken Dabanaka Tsutomu Namikawa Department of Surgery Kochi Medical School Kochi University

AIM: To evaluate the clinical usefulness of Daikenchuto (DKT) in hepatecomized patients. METHODS: Twenty patients were enrolled with informed consent. Two patients were excluded because of cancelled operations. The remaining 18 patients were randomly chosen for treatment with DKT alone or combination therapy of DKT and lactulose (n = 9, each group). Data were prospectively collected. Primary end points were Visual Analogue Scale (VAS) score for abdominal bloating, total Gastrointestinal Symptoms Rating Scale (GSRS) score for abdominal symptoms, and GSRS score for abdominal bloating. RESULTS: The VAS score for abdominal bloating and total GSRS score for abdominal symptoms recovered to levels that were not significantly different to preoperative levels by 10 d postoperation. Combination therapy of DKT and lactulose was associated with a significantly poorer outcome in terms of VAS and GSRS scores for abdominal bloating, total GSRS score, and total daily calorie intake, when compared with DKT alone therapy. CONCLUSION: DKT is a potentially effective drug for postoperative management of hepatectomized patients, not only to ameliorate abdominal bloating, but also to promote nutritional support by increasing postoperative dietary intake.

关键词： Daikenchuto Hepatic resection Abdominal bloating Visual analogue scale score Gastrointestinal symptoms rating scale score

Laparoscopic splenectomy for splenic hamartoma:Case management and clinical consequences

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World Journal of Gastrointestinal Surgery 2010年第4期2卷 147-152页

作者： Tsutomu Namikawa hiroyuki kitagawa Jun Iwabu Michiya Kobayashi Manabu Matsumoto Kazuhiro Hanazaki Department of Surgery Kochi Medical SchoolKohasu-OkochoNankokuKochi 783-8505Japan Department of Human Health and Medical Sciences Kochi Medical SchoolKohasu-OkochoNankokuKochi 783-8505Japan Laboratory of Diagnostic Pathology Kochi Medical SchoolKohasu-OkochoNankokuKochi 783-8505Japan

Splenic hamartoma is a rare benign tumor,and although minimally invasive surgery may be suitable for this condition,there have only been 2 previous reports of laparoscopic *** we report the third case of splenic hamartoma managed by laparoscopic splenectomy.A 37-year-old male was incidentally diagnosed by abdominal ultrasonography with a hypoechoic mass measuring 2.5 cm × 2.4 cm in the *** Doppler sonography showed multiple flow signals within the mass and contrast-enhanced computed tomography revealed strong enhancement of the *** T1-and T2-weighted magnetic resonance images,the splenic mass was demonstrated as isointense and hyperintense *** a malignant tumor could not be ruled out,a hand-assisted laparoscopic splenectomy was performed because the splenic mass was limited in size and had not invaded adjacent *** pathological diagnosis was splenic *** postoperative course was uneventful and the patient was discharged by the seventh postoperative *** splenic hamartomas have some specific imaging features,more reports and analyses of these cases are required to increase the reliability of the diagnosis and ***-assisted laparoscopic splenectomy may play a pivotal role in the postoperative diagnosis and management of this condition.

关键词： Splenic hamartoma Splenoma Splenic tumor Laparoscopic splenectomy Splenectomy

Risk management of cosmetic acupuncture

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World Journal of Acupuncture-Moxibustion 2020年第4期30卷 300-303页

作者： Kozue Orihashi hiroyuki Mitsunaga Mari Okamoto Mitsuhiro Kawabata Ryo Hasegawa Kazue Nakamura Yu TAN Masateru Kawai hiroyuki kitagawa Ang ZHOU Bishinkai Tokyo 108-0071Japan Medical Cosmetic Acupuncture Association Tokyo 106-0045Japan Anti-Aging Biyouhari Kenkyukai Nagoya city 466-0023Japan Seirin corporation Sizhioka city 424-0037Japan Sichuan Yuanquan Technology Co. LtdChengdu 610041China

In order to guarantee the clinical safety of cosmetic acupuncture,all kinds of potential risks are clarified and *** organizations for cosmetic acupuncture training have conducted the investigation on the risk of cosmetic acupuncture *** investigation contents have been collected to be a *** focuses on 12 treatment items that may cause the risks in cosmetic acupuncture and 3 treatment items that is coincident with cosmetic *** potential risks are summarized in clinical practice under the risk management of cosmetic acupuncture.

关键词： Acupuncture Cosmetic Safety Risk

松嫩平原西部碱尘气溶胶的时段变化及其气候影响因素分析

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环境科学学报 2006年第3期26卷 521-527页

作者：陈兵胡克介冬梅北川浩之李福来吉林大学地球科学学院长春130061 中国地质大学(北京)海洋学院北京100083 东北师范大学城市与环境科学学院长春130024 名古屋大学环境学大学院研究科

利用耦合等离子体发射光谱测试技术(ICP-AES)对松嫩平原西部2003年7月到2004年5月间获得的大气总悬浮颗粒物(TSP)样品进行了元素分析,并结合气象资料和TSP质量浓度,初步确定了碱尘活动年际内的演变规律及其主要控制因素.结果表明,TSP质... 详细信息

利用耦合等离子体发射光谱测试技术(ICP-AES)对松嫩平原西部2003年7月到2004年5月间获得的大气总悬浮颗粒物(TSP)样品进行了元素分析,并结合气象资料和TSP质量浓度,初步确定了碱尘活动年际内的演变规律及其主要控制因素.结果表明,TSP质量浓度的高峰时段是早春,其元素总体浓度亦高于其它时段,其中Na元素浓度具有明显的高值,表明碱尘在该时段为TSP的主要成分;晚春时段区域沙尘影响加强,很难监测本地碱尘活动;夏季,碱尘的3种重要元素(Na、Ca、K)含量增加,表明夏季有碱尘活动,与TSP浓度偏高吻合;秋季,碱尘和区域沙尘的活动均减弱.影响碱尘活动的气候因子主要是风力、降水量、温度、日照和湿度,但不同时段其主导作用不同.

关键词：碱尘时段变化元素组成气候因素