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RISS 인기검색어
- 검색키워드
- 저자 : A. Eguchi (검색결과 2 건)
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On the flutter Characteristics of separated two box girders
M. Matsumoto,R. Shijo,A. Eguchi,T. Hikida,H. Tamaki,K. Mizuno 한국풍공학회 2004 Wind and Structures, An International Journal (WAS Vol.7 No.4
The flutter characteristics of long span bridges are discussed from the point of the unsteady pressure distribution on bridge deck surface during heaving/torsional vibration related to the aerodynamic derivatives. In particular, it is explained that the coupling terms, which consist of A1* and H3*, play a substantial role on the coupled flutter, in comparison with the flutter characteristics of various structural sections. Also the effect of the torsional/heaving frequency ratio of bridge structures on the flutter instability is discussed from the point of the coupling effect between heaving and torsional vibrations.
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Elevated Levels of Serum Pentosidine Are Associated with Dropped Head Syndrome in Older Women
Yawara Eguchi,Toru Toyoguchi,Kazuhide Inage,Kazuki Fujimoto,Sumihisa Orita,Kazuyo Yamauchi,Miyako Suzuki,Hirohito Kanamoto,Koki Abe,Masaki Norimoto,Tomotaka Umimura,Masao Koda,Takeo Furuya,Yasuchika A 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.1
Study Design: A retrospective observational study was performed. Purpose: We investigated the prevalence of sarcopenia in dropped head syndrome (DHS), and the relationship between biochemical markers, including major advanced glycation end products (AGEs), pentosidine, and DHS in older women. Overview of Literature: AGEs have been implicated in the pathogenesis of sarcopenia. Methods: We studied 13 elderly women with idiopathic DHS (mean age, 77.2 years) and 20 healthy volunteers (mean age, 74.8 years). We used a bioelectrical impedance analyzer to analyze body composition, including appendicular skeletal muscle mass index (SMI; appendicular lean mass [kg]/[height (m)]2). Cervical sagittal plane alignment, including C2–C7 sagittal vertical axis (C2–C7SVA), C2–C7 angle, and C2 slope (C2S), was measured. Biochemical markers, such as serum and urinary pentosidine, serum homocysteine, 1, 25-dihydroxyvitamin D, and 25-hydroxyvitamin D, were measured. The level of each variable was compared between DHS and controls. The relationship between biochemical markers and DHS was examined. Results: Sarcopenia (SMI <5.75) was observed at a high prevalence in participants with DHS (77% compared to 22% of healthy controls). Height, weight, femoral bone mineral density, appendicular lean mass, total lean mass, and SMI all had significantly lower values in the DHS group. Serum and urinary pentosidine, and serum homocysteine were significantly higher in the DHS group compared to controls. Analysis of cervical alignment revealed a significant positive correlation of serum pentosidine with C2–C7SVA and C2S. Conclusions: Sarcopenia was involved in DHS, and high serum pentosidine levels are associated with severity of DHS in older women.
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