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Microwave absorption behaviors of polyaniline nanocomposites containing TiO2 nanoparticles
Sook Wai Phang,Masato Tadokoro,Jiro Watanabe,Noriyuki Kuramoto 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
As nanomaterial possessing moderate conductivity and dielectric property, novel hexanoic acid doped polyaniline (PAni) nanocom-posites containing TiO2 absorption properties of PAni nanocomposites were investigated. The resulted nanorods/tubes in SEM images clearly showed that poly-merization proceeded in micelle/water interface through elongation. The nanocomposites synthesized at 0.C resulted in large number ofnanorods/tubes compared with those synthesized at 25.C. The nanocomposites synthesized at 0.C possess higher permittivity and het-erogeneity, hence will give rise to good microwave absorption property (>99.0% power absorption) in the frequency range of 1013 GHzcompared with 25.C. Among all nanocomposites prepared, PAni/HA/TiO2 with highest permittivity, heterogeneity and loss tangent hasachieved maximum reection loss of 31 dB (>99.9% power absorption) at 10 GHz.
Kobashi, Syoji,Fujimoto, Satoshi,Nishiyama, Takayuki,Kanzaki, Noriyuki,Fujishiro, Takaaki,Shibanuma, Nao,Kuramoto, Kei,Kurosaka, Masahiro,Hata, Yutaka Korean Institute of Intelligent Systems 2010 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.10 No.1
For developing navigation system of total hip arthroplasty (THA) and evaluating hip joint kinematics, 3-D pose position of the femur and acetabulum in the pelvic coordinate system has been quantified. The pelvic coordinate system is determined by manually indicating pelvic landmarks in multidetector-row computed tomography (MDCT) images. It includes intra- and inter-observer variability, and may result in a variability of THA operation or diagnosis. To reduce the variability of pelvic coordinate system determination, this paper proposes an automated method in MDCT images. The proposed method determines pelvic coordinate system automatically by detecting pelvic landmarks on anterior pelvic plane (APP) from MDCT images. The method calibrates pelvic pose by using silhouette images to suppress the affect of pelvic pose change. As a result of comparing with manual determination, the proposed method determined the coordinate system with a mean displacement of $2.6\;{\pm}\;1.6$ mm and a mean angle error of $0.78\;{\pm}\;0.34$ deg on 5 THA subjects. For changes of pelvic pose position within 10 deg, standard deviation of displacement was 3.7 mm, and of pose was 1.28 deg. We confirmed the proposed method was robust for pelvic pose changes.
Syoji Kobashi,Satoshi Fujimoto,Takayuki Nishiyama,Noriyuki Kanzaki,Takaaki Fujishiro,Nao Shibanuma,Kei Kuramoto,Masahiro Kurosaka,Yutaka Hata 한국지능시스템학회 2010 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.10 No.1
For developing navigation system of total hip arthroplasty (THA) and evaluating hip joint kinematics, 3-D pose position of the femur and acetabulum in the pelvic coordinate system has been quantified. The pelvic coordinate system is determined by manually indicating pelvic landmarks in multidetector-row computed tomography (MDCT) images. It includes intra- and inter-observer variability, and may result in a variability of THA operation or diagnosis. To reduce the variability of pelvic coordinate system determination, this paper proposes an automated method in MDCT images. The proposed method determines pelvic coordinate system automatically by detecting pelvic landmarks on anterior pelvic plane (APP) from MDCT images. The method calibrates pelvic pose by using silhouette images to suppress the affect of pelvic pose change. As a result of comparing with manual determination, the proposed method determined the coordinate system with a mean displacement of 2.6 ± 1.6 mm and a mean angle error of 0.78 ± 0.34 deg on 5 THA subjects. For changes of pelvic pose position within 10 deg, standard deviation of displacement was 3.7 mm, and of pose was 1.28 deg. We confirmed the proposed method was robust for pelvic pose changes.