Disturbance-Decoupled Observer Design for Separable-Denominator 2-D Systems

publisherThis paper is concerned with the problem of designing an observer for the Roesser state-space model with unknown disturbance where the transfer function of the model is assumed to be separable in denominator. The paper shows the minimal order for the existence of an observer and a necessary and sufficient condition for a minimal-order observer to decouple unknown disturbance. In addition, a necessary and sufficient condition for a minimal-order observer to be stabilizable is examined. Finally, an algorithm is presented for designing a disturbance decoupled observer.departmental bulletin pape

The Effects of Processing Efficiency on a Span Test of Spatial Working Memory: A Comparison between 2D and 3D Stimuli

ワーキングメモリ容量を測定するスパンテストにおいて，処理効率はスパン得点に影響しないと言われている。しかしBaylissら(2003)や前原(2007)のデータを見ると，処理効率がスパン得点に及ぼす影響を明確に否定することはできない。処理効率がスパン得点に影響を及ぼすなら，ワーキングメモリ研究はこの点を考慮する必要があるのではないだろうか。本研究では，空間性スパンテストにおいて処理効率がスパン得点に及ぼす影響を検討する。 　大学生44名を対象に，2次元図形もしくは3次元図形の心的回転課題を処理課題とする空間性スパンテストを行った。その結果，3次元図形を用いた場合のみ，処理課題得点とスパン得点の間に有意な正の相関が見られた。これは，処理速度の影響を除外した偏相関においても同様だった。 　以上の結果から，処理課題の難易度によって，処理効率のスパン得点に対する影響は異なることが示唆された。ワーキングメモリ容量の影響について検討する際は，スパンテストで用いられる処理課題について慎重に吟味し，スパン得点への影響について確認しておくことが望ましいのではないだろうか。departmental bulletin pape

Self-reported neurological symptoms in relation to CO emissions due to problem gas appliance installations in London: a cross-sectional survey

Background: Previous research by the authors found evidence that up to 10% of particular household categories may be exposed to elevated carbon monoxide (CO) concentrations from poor quality gas appliance installations. The literature suggests certain neurological symptoms are linked to exposure to low levels of CO. This paper addresses the hypothesis that certain self-reported neurological symptoms experienced by a householder are linked to an estimate of their CO exposure.Methods: Between 27 April and 27 June 2006, 597 homes with a mains supply of natural gas were surveyed, mainly in old, urban areas of London. Qualified gas engineers tested all gas appliances (cooker, boiler, gas fire, and water heater) and reported, according to the Gas Industry Unsafe Situations Procedure, appliances considered At Risk (AR), Immediately Dangerous (ID) or Not to Current Standards (NCS). Five exposure risk categories were defined based on measurement of CO emitted by the appliance, its features and its use, with "high or very high" exposure category where occupants were considered likely to be exposed to levels greater than 26 ppm for one hour. The prevalence of symptoms at each level of exposure was compared with that at lowest level of exposure.Results: Of the households, 6% were assessed as having a "high or very high" risk of exposure to CO. Of the individuals, 9% reported at least one neurological symptom. There was a statistically significant association between "high or very high" exposure risk to CO and self-reported symptoms compared to "no exposure" likelihood, for households not in receipt of benefit, controlling for "number of residents" and presence of pensioners, OR = 3.23 (95% CI: 1.28, 8.15). Risk ratios across all categories of exposure likelihood indicate a dose-response pattern. Those households in receipt of benefit showed no dose-response pattern.Conclusion: This study found an association between risk of CO exposure at low concentration, and prevalence of self-reported neurological symptoms in the community for those households not in receipt of benefit. As health status was self-reported, this association requires further investigation

Analysis of Differences in Lifestyle and Nutrition Intake of Women in Each Stage of Pregnancy

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エコチル調査・宮城ユニットセンターにおける妊婦の医薬品使用状況の評価-宮城ユニットセンター薬剤詳細調査より-

第3回日本DOHaD研究会学術集会 抄録集 【ポスター発表】journal articl

Measurement of charmless B decays to etaK* and etarho

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Elvellaceae Japoniae

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教師経営参加論の基礎的考察（II） －米国の場合を中心として－

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アレクサンダー・テクニークについての研究 ： 実践プログラムの簡易化と歌唱を通しての実験的検証

兵庫教育大学修士application/pdfabstract学位論文内容の要旨thesi

III時間割の科学 : 中等教育における教育課程と教師・生徒との接点の研究(2)(〔一〕教育課程の研究)(共同研究)

1971-03-25国立情報学研究所で電子化したコンテンツを使用している。departmental bulletin pape