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Synchronous coexistence of liver metastases from cecal leiomyosarcoma and rectal adenocarcinoma: A case report

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World Journal of Gastroenterology 2017年第9期23卷 1725-1734页

作者： Hideki Aoki Takashi Arata Masashi Utsumi Yutaka Mushiake Tomoyoshi Kunitomo Isao Yasuhara Fumitaka Taniguchi Koh Katsuda Kohji Tanakaya hitoshi takeuchi Rie Yamasaki Department of Surgery Iwakuni Clinical Center Department of Pathology Iwakuni Clinical Center

Multiple liver tumors represent a challenging condition for abdominal surgeons both in the selection of technique and the rarity of diagnosis. There are no case reports on co-existence of liver metastases from both intestinal leiomyosarcoma and adenocarcinoma. The patient described in this report successfully underwent resection of both primary lesions and liver metastases in combination with chemotherapy. As for the leiomyosarcoma, the primary cecal lesion was revealed more than three years after the patient's first visit. Peritoneal, lymph-node, and lung recurrences were observed afterward, and thus surgeries on those regions were performed. Pathologically, the peritoneal and lung recurrences comprised leiomyosarcoma and the lymphnode recurrence was diagnosed as adenocarcinoma. Despite newly discovered multiple lung recurrences and regional lymph-node metastases, the patient lived a normal life for 73 mo after the initial operation based on multidisciplinary therapy. He ultimately died of liver failure due to invasive lymph-node recurrence from the rectal adenocarcinoma, in addition to multiple lung recurrences from the leiomyosarcoma. Hepatic recurrence did not occur in this patient's case, which appears to be one reason for his long-term survival.

关键词： Leiomyosarcoma 化疗多重肝肿瘤肝转移腺癌

Changes over time in milk test results following pancreatectomy

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World Journal of Gastrointestinal Surgery 2016年第3期8卷 246-251页

作者： Hideki Aoki Masashi Utsumi Kenta Sui Nobuhiko Kanaya Tomoyoshi Kunitomo hitoshi takeuchi Norihisa Takakura Shigehiro Shiozaki Hiroyoshi Matsukawa Department of Surgery Iwakuni Clinical Center Department of Surgery Fukuyama City Hospital Department of Surgery Hiroshima City Hospital

AIM: To investigate changes over time in, and effects of sealing technology on, milk test results following pancreatectomy. METHODS: From April 2008 to October 2013, 66 pancreatic resections were performed at the Iwakuni Clinical Center. The milk test has been routinely conducted at the institute whenever possible during pancreatectomy. The milk test comprises the following procedure: A nasogastric tube is inserted until the third portion of the duodenum, followed by injection of 100 mL of milk through the tube. If a chyle leak is present, the patient tests positive in this milk test based on the observation of a white milky discharge. Positive milk test rates, leakage sites, and chylous ascites incidence were examined. Liga Sure?(LS; Covidien, Dublin, Ireland), a vessel-sealing device, is routinely used in pancreatectomy. Positive milk test rates before and after use of LS, as well as drain discharge volume at the 2^(nd) and 3^(rd) postoperative days, were compared retrospectively. Finally, positive milk test rates and chylous ascites incidence were compared with the results of a previous report.RESULTS: Fifty-nine milk tests were conducted during pancreatectomy. The positive milk test rate for all pancreatectomy cases was 13.6%(8 of 59 cases). One case developed postoperative chylous ascites(2.1% among the pancreatoduedenectomy cases and 1.7% among all pancreatectomies). Positive rates by procedure were 12.8% for pancreatoduodenectomy and 22.2% for distal pancreatectomy. Positive rates by disease were 17.9% for pancreatic and 5.9% for biliary diseases. When comparing results from before and after use of LS, positive milk test rates in pancreatoduodenectomy were 13.0% before and 12.5% after, while those in distal pancreatectomy were 33.3% and 0%. Drainage volume tended to decrease when LS was used on the 3^(rd) postoperative day(volumes were 424 ± 303 mL before LS and 285 ± 185 mL after, P = 0.056). Both chylous ascites incidence and positive milk test rates decreased slightly compared with those rates from the

关键词： Chylous ascites Milk test Pancreatectomy Surgical energy device Drain discharge

The deep-space multi-object orbit determination system and its application to Hayabusa2’s asteroid proximity operations

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Astrodynamics 2020年第4期4卷 377-392页

作者： Hiroshi takeuchi Kent Yoshikawa Yuto Takei Yusuke Oki Shota Kikuchi hitoshi Ikeda Stefania Soldini Naoko Ogawa Yuya Mimasu Go Ono Fuyuto Terui Naoya Sakatani Manabu Yamada Toru Kouyama Shingo Kameda Takanao Saiki Yuichi Tsuda Institute of Space and A stronautical Science Japan A erospace Exploration AgencySagamihara 252-5210Japan The Graduate University for Aduanced Studies Hayama 240-0193Japan Research and Development Directorate Japan Aerospace Exploration AgencySagamihara 252-5210Japan University of Liverpool Liverpool L693BXUK Chiba Institute of Technology Narashino 275-0016Japan National Institute of Aduanced Industrial Science and Technology Koto-ku 135-0064Japan Rikkyo University Toshima-ku 171-8501Japan

The deep-space multi-object orbit determination system(DMOODS)and its application in the asteroid proximity operation of the Hayabusa2 mission are described.DMOODS was developed by the Japan Aerospace Exploration Agency(JAXA)for the primary purpose of determining the trajectory of deep-space spacecraft for JAXA’s planetary missions.The weighted least-squares batch filter is used for the orbit estimator of DMOODS.The orbit estimator supports more than 10 data types,some of which are used for relative trajectory measurements between multiple space objects including natural satellites and small bodies.This system consists of a set of computer programs running on Linux-based consumer PCs on the ground,which are used for orbit determination and the generation of radiometric tracking data,such as delta differential one-way ranging and doppler tracking data.During the asteroid proximity phase of Hayabusa2,this system played an essential role in operations that had very strict navigation requirements or operations in which few optical data were obtained owing to special constraints on the spacecraft attitude or distance from the asteroid.One example is orbit determination during the solar conjunction phase,in which the navigation accuracy is degraded by the effect of the solar corona.The large range bias caused by the solar corona was accurately estimated with DMOODS by combining light detection and ranging(LIDAR)and ranging measurements in the superior solar conjunction phase of Hayabusa2.For the orbiting operations of target markers and the MINERVA-II2 rover,the simultaneous estimation of six trajectories of four artificial objects and a natural object was made by DMOODS.This type of simultaneous orbit determination of multi-artificial objects in deep-space has never been accomplished before.

关键词： orbit determination optical navigation gravity measurements superior solar conjunction delta differential one-way ranging(delta-DOR)

Relationship between Senior Drivers’ Cognitive and Physical Functions and Urban Driving Behaviors during Behind-the-Wheel Driving Education Sessions with Driving Instructors

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Journal of Transportation Technologies 2017年第2期7卷 148-166页

作者： Takashi Yonekawa Takahiro Tanaka Hirofumi Aoki Misako Yamagishi Yuki Yoshihara Eijiro takeuchi Issey Takahashi Yoshiki Ninomiya hitoshi Kanamori Tatsuya Suzuki Makoto Inagami Institute of Innovation for Future Society Nagoya University Nagoya Japan

Recently, traffic accidents caused by elderly drivers have been increasing. It is thought that the reasons of accidents are functions such as decline of eyesight, cognition and physical strength caused by aging. In order to assist safe driving for elderly drivers, it is necessary to sufficiently understand any possible relationship of various senior drivers’ cognition, physical strength and driving behavior. In this paper relationship of elderly driver’s cognition, physical strength and driving behaviors were analyzed using the result of driving instructions on urban road by driving school instructors.

关键词： Human Engineering Elderly Person Driver Characteristics Driving Instruction

Hayabusa2’s station-keeping operation in the proximity of the asteroid Ryugu

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Astrodynamics 2020年第4期4卷 349-375页

作者： Yuto Takei Takanao Saiki Yukio Yamamoto Yuya Mimasu Hiroshi takeuchi hitoshi Ikeda Naoko Ogawa Fuyuto Terui Go Ono Kent Yoshikawa Tadateru Takahashi Hirotaka Sawada Chikako Hirose Shota Kikuchi Atsushi Fuji Takahiro Iwata Satoru Nakazawa Masahiko Hayakawa Ryudo Tsukizaki Satoshi Tanaka Masanori Matsushita Osamu Mori Daiki Koda Takanobu Shimada Masanobu Ozaki Masanao Abe Satoshi Hosoda Tatsuaki Okada Hajime Yano Takaaki Kato Seiji Yasuda Kota Matsushima Tetsuya Masuda Makoto Yoshikawa Yuichi Tsuda Japan Aerospace Exploration Agency Sagarmihara 252-5210Japan The Graduate University for Advanced Studies Sagarmihara 252-5210Japan NEC Aerospace Systems LtdFruchu 183-8502Japan NEC Corporation Puchu 183-8501Japan

The Japanese interplanetary probe Hayabusa2 was launched on December 3,2014 and the probe arrived at the vicinity of asteroid 162173 Ryugu on June 27,2018.During its 1.4 years of asteroid proximity phase,the probe successfully accomplished numbers of record-breaking achievements including two touchdowns and one artificial cratering experiment,which are highly expected to have secured surface and subsurface samples from the asteroid inside its sample container for the first time in history.The Hayabusa2 spacecraft was designed not to orbit but to hover above the asteroid along the sub Earth line.This orbital and geometrical configuration allows the spacecraft to utilize its high-gain antennas for telecommunication with the ground station on Earth while pointing its scientific observation and navigation sensors at the asteroid.This paper focuses on the regular station-keeping operation of Hayabusa2,which is called“home position”(HP)-keeping operation.First,together with the spacecraft design,an operation scheme called HP navigation(HPNAV),which includes a daily trajectory control and scientific observations as regular activities,is introduced.Following the description on the guidance,navigation,and control design as well as the framework of optical and radiometric navigation,the results of the HP-keeping operation including trajectory estimation and delta-V planning during the entire asteroid proximity phase are summarized and evaluated as a first report.Consequently,this paper states that the HP.keeping operation in the framework of HPNAV had succeeded without critical incidents,and the number of trajectory control delta-V was planned fficiently throughout the period.

关键词： small body mission station-keeping guidance,navigation,and control(GNC) optical and radiometric navigation

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使用生铁锈和铁酸盐处理水的方法和设备

水处理信息报导 2008年第5期 35-35页

作者： takeuchi, hitoshi

水处理涉及利用Fe（OH）2对沉淀污染物进行预处理和利用净化材料进一步沉淀污染物的后处理，该净化材料是生铁锈和铁酸盐的混合物。该水处理设备包括一个预处理槽，一个反应槽用于后处理，一个固．液分离槽，一个投加碱的调节槽、用于... 详细信息

水处理涉及利用Fe（OH）2对沉淀污染物进行预处理和利用净化材料进一步沉淀污染物的后处理，该净化材料是生铁锈和铁酸盐的混合物。该水处理设备包括一个预处理槽，一个反应槽用于后处理，一个固．液分离槽，一个投加碱的调节槽、用于连接这些槽的管道以及使调节碱度后的沉淀物返回预处理槽和反应槽的返回管线。被分离的沉淀物被压实，并以高的固．液分离效果被分离。利用铁酸盐处理后的水质得到改善。

关键词：水处理设备铁酸盐盐处理铁锈 Fe(OH)2 净化材料沉淀物分离槽