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Based on the pole allocation method in control theory, the authors’ previous research found out a fundamental closed-form equation governing a three-lumped-mass stick-shape shear model for a building. Through the selection of appropriate model parameters, the simplified model can represent an earthquake-resistant structure, a base-isolated structure, an interstory-isolated structure, or a passively controlled structure with a tuned mass damper or viscous interstory dampers. The equation explains how the model parameters are related to the control target and generally proves the trade-off relationship in the passive control effect. The present study similarly applies the pole allocation method to a multi-lumped-mass stick-shape model to provide the trade-off relationship with higher generality. The newly introduced equation has the same form as the previous research indicated. Next, this study discusses the installation distribution of interstory dampers from a viewpoint of modal damping as control target.

For a building with a passive control system, an inverse problem is formulated based on the pole allocation method in control theories. The structural system is simplified as a 3DOF damped lumped-mass shear model. The model can express an earthquake resistant structure, a base-isolated structure, an interstory-isolated structure, or a structure with a tuned mass damper or viscous dampers by changing its parameters adequately. The natural frequencies and the corresponding damping ratios in three vibration modes are set as the initial control target for performance-based design. The introduced closed-form expression explains how model parameters are related to the control target, and the mathematical expression generally proves the trade-off relationship in passive control effect. The relationship is extended to an MDOF damped-mass shear model. The numerical examples indicate that the pole allocation has arbitrariness in selecting a solution and a limited solution can be applied to the actual building.

航法技術は宇宙機に不可欠な技術であり，宇宙機自身の位置や速度，姿勢といった状態量を知るための技術である．宇宙機のそうした情報を知ろうとした場合，一般的には地上局からのレンジングや慣性航法装置などが使われるが，深宇宙の小天体を探査するミッションなどでは航法精度が足りない場合がある．このようなミッションでは，対象天体に安全かつ高精度に接近するための技術が求められる．画像情報を用いた航法技術はそうしたミッションで使われることが多く，これまでも小惑星探査や小天体フライバイなど多くミッションで実証されてきた．さらに近年では月や火星の豊富な科学データをもとにあらかじめ決めた着陸地点に高精度で着陸するミッションも多く立案されている．そうしたミッションでも画像を用いた航法技術は大いに有用である．本稿は，画像情報を用いた宇宙機の航法技術全般について国内外の探査プロジェクトないしは技術実証プロジェクトのサーベイを行い，その結果をまとめたものである．, Navigation technology is essential for spacecraft, and is a technique to get the state such as the position, velocity, and attitude of spacecraft itself. Generally, ranging from ground stations or inertial navigation systems are used to obtain such information of spacecraft. However in recent mission such like small body exploration in deep space, the navigation accuracy is insufficient. In such missions, technologies for safe and accurate access to the target bodies are required. Vision-based navigation technologies are often used in such missions, and has been demonstrated in many missions such as asteroid exploration and asteroid flyby. In recent years, many missions that aim to land predetermined landing point precisely have been planned based on abundant scientific data of the moon and Mars. Vision-based navigation technologies are also very useful in these missions. This paper summarizes the results of surveys of domestic and overseas exploration projects or technology demonstration projects on vision-based navigation technology for spacecraft., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1930020000, レポート番号: JAXA-RM-19-005

第16回宇宙環境シンポジウム (2019年11月12日-13日. 東京都市大学横浜キャンパス), 横浜市, 神奈川県, The 16th Spacecraft Environment Symposium (November 12-13, 2019. Yokohama Campus, Tokyo City University), Yokohama, Kanagawa, Japan, It has been reported that the MLI and OSR of spacecraft and the insulation layer of the wire harness are charged by high-energy charged particles such as electrons and protons, resulting in operational abnormalities due to electrostatic discharge. In this study, we measured space charge distribution during proton beam irradiation in order to understand the charge accumulation characteristics of space insulating materials by proton beam irradiation. As a result, positive charge accumulation was observed in the sample, and different charge accumulation tendencies were obtained in the proton passage region and the unreachable region. This elephant is thought to be caused by radiation-induced conduction with different origin in each region and the increase in conductivity, and was examined from the accumulated charge amount and distribution., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1930014001, レポート番号: JAXA-SP-19-009

研究の目的 : 多変量解析とGISを用いて、乳幼児を対象とする日本の予防接種率の地域差の実態を把握し、その要因を検討する。研究の背景 : 公衆衛生上の課題である予防接種率の地域差の特定と改善を目的として、多様な地域スケールからその要因を分析する研究が行われている。しかしながら、日本における既往研究では個人を対象とした研究が多く、接種率の地域差の検討や関連要因を用いた生態学的研究もほとんど行われてこなかった。研究手法 : 日本の1737の市区町村における7種類19回の予防接種を対象として、重回帰分析と市区町村―都道府県間の階層を用いたマルチレベル分析を行った。被説明変数には推計した2013年から2018年までの予防接種率を、説明変数には9つの個人要因と4つの環境要因を用いた。これらの変数の作成には国勢調査などの政府統計を用いた。予防接種率の分布図と予測モデルの残差プロットを用いて、地理的な関連要因を探索した。結果 : 一人当たり課税所得と乳幼児健診受診率は市区町村レベルで、世帯の児童数は都道府県レベルで全般的に有意な関連を示した。その他の変数は予防接種の種類や接種時期(回数)によって関連の有無が異なった。接種率は西日本で低く、大都市圏で高い傾向がみられた。残差は内陸部と接種率の偏差が大きい地域に多く見られた。考察 : 市区町村の所得格差と都道府県の世帯あたり児童数の差が、地域の接種率の格差に関連すると示唆された。また、人口減少と高齢化が進む小規模地域には接種率に関連する固有の因子が存在する可能性がある。結論 : 接種率の向上には、その地域の社会経済的状況や人口構造、地域の文脈、予防接種の種類、それらの要因の影響するスケールを踏まえた施策が求められる。, Objective: Examining geographical variation and the factors of infant immunization coverage in Japan. Background: Incomplete vaccination coverage is one of the largest public health threats. Many interdisciplinary studies have investigated factors that might increase immunization rates or cause Vaccine Hesitancy. However, most studies in Japan have focused on individuals and few studies have considered regional disparities of vaccination coverage. Methods: We conducted a multiple regression analysis and a multilevel analysis (municipality-prefecture hierarchy) for 19 vaccinations in 1737 municipalities in Japan, during 2013-2018. The dependent variable was the estimated vaccination rate, and nine individual factors and four environmental factors were used as explanatory variables. Data were collected from publicly available sources. We used distribution maps of vaccination rates and residuals of the predictive models to explore geographical factors. Results: In general, per capita taxable income and infant health checkup rate showed generally significant positive associations at the municipal level, and the number of children in the household negative association at the prefectural level. Other factors showed various associations depending on the type and the timing of vaccines. Vaccination rates were likely to be lower in western Japan and higher in metropolitan areas. Residuals were found mostly in inland areas and areas with large deviations in vaccination rates. Discussion: These results suggested that vaccination rates were associated with regional differences in municipal income inequality and in the number of children per household in prefectures. Smaller villages with declining and aging populations might have unique factors. Conclusions: To increase vaccination coverage among infants, it requires to consider the effect size at various spatial scales, in addition to compositional and contextual effects as the socioeconomic status, demographic structure, the local contexts, and the type of vaccination.

2020年度宇宙科学情報解析シンポジウム(2021年2月19日. オンライン開催), Space Science Informatics Symposium FY2020(February 19, 2021. Online Meeting), 資料番号: SA6000159012

第21回宇宙科学シンポジウム (2021年1月6日-7日. オンライン開催), 21st Space Science Symposium (January 6-7, 2021. Online Meeting), 著者人数: 16名, 資料番号: SA6000163088, レポート番号: g10-4

A 71-year-old man visited a local urologist with the complaint of continuous painful erection for three days. Penile cavernosal blood data showed acidosis and hypoxia. Thus he was diagnosed with ischemic priapism. After penile aspiration and injection of phenylephrine, erection was temporary improved. The blood platelet count was 94.5×104/μl and myeloproliferative disease was suspected. He was referred to our hospital and visited us the following day. Since priapism relapsed, we aspirated corpus cavernosum of the penis and injected phenylephrine which was successful. A bone marrow biopsy and genetic test were performed at the department of hematology and the diagnosis of essential thrombocythemia with JAK2 gene mutation was confirmed. By treatment with hydroxyurea, the blood platelet count decreased without priapism recurrence.

第1回ハイブリッドロケットシンポジウム（2018年6月28日-29日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)）, 相模原市, 神奈川県, 1st Hybrid Rocket Symposium (June 28-29, 2018. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000126025, レポート番号: HR-2018-023

平成29年度宇宙輸送シンポジウム（2018年1月18日-19日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)）, 相模原市, 神奈川県, Space Transportation Symposium FY2017 (January 18-19, 2018. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000210101, レポート番号: STEP-2017-044

平成29年度宇宙輸送シンポジウム（2018年1月18日-19日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)）, 相模原市, 神奈川県, Space Transportation Symposium FY2017 (January 18-19, 2018. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000210095, レポート番号: STEP-2017-037

ポストコロニアル・フォーメーションズ(8)

Mucinous tubular and spindle cell carcinoma (MTSCC) is a distinct entity in the World Health Organization classification of kidney tumors since 2004. Herein, we report a case of a patient with MTSCC of the kidney. A 48-year-man visited our hospital with a chief complaint of occult blood in his urine, confirmed by urine occult blood reaction. Computed tomography revealed a solid tumor in the right kidney. The tumor was 40×38 mm in length and was slightly enhanced (cT1aN0M0). Therefore, we performed radical nephrectomy. On analysis of the resected specimen, we found that the number of comparatively small malignant cells had increased markedly, forming branched tubular cuboidal cells. Further more, positive results were obtained on staining the stroma with both PAS and alcian blue stainscharacteristic of papillary renal cell carcinoma ; however, extracellular mucinous material was found to be depleted. Therefore, we needed to differentiate between papillary renal cell carcinoma and MTSCC. Finally, on the basis of the immunohistochemical staining results-vimentin (＋), CK34βE12 (−), and CD10 (−)-MTSCC was confirmed.

第26回アストロダイナミクスシンポジウム (2016年7月25-26日. 宇宙航空研究開発機構宇宙科学研究所), 相模原市, 神奈川県, The 26th Workshop on JAXA Astrodynamics and Flight Mechanics 2016 (July 25-26, 2016. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000088047, レポート番号: C-5

We report a case of vesical endometriosis that worsened during the early pregnancy period. A 37-yearold woman had been under treatment for endometriosis (including vesical endometriosis) by a gynecologist during the past 10 years. She was treated for sterility 1 year ago, and became pregnant through in vitro fertilization. In her 8th gestational week, she complained of gross hematuria at our hospital. Cystoscopic findings revealed some tumors that appeared worse than the last findings two years ago. In order to deny malignancy, transurethral resection of the bladder tumor was performed in her 12th gestational week. The pathologic diagnosis was endometriosis. She was able to stay pregnant, and delivered a girl. After delivery, cystoscopic findings revealed reduction of tumors. In most cases pregnancy cures endometriosis ; however, in this case symptoms became worse during the early stage of pregnancy. The reason for this contrary event is discussed.

ポストコロニアル・フォーメーションズ(7)

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ポストコロニアル・フォーメーションズ(6)

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