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Experimental Evaluation on Effect of Steering Reactive Torque of SBW Vehicle on Driving Behavior
Toshihiro Hiraoka,Hidenori Kusabe,Hiromitsu Kumamoto 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Steering reactive torque presentation is important for drivers of a steer-by-wire(SBW) vehicle to inform of the driving environment such as the road surface condition and the working state of the SBW controller. However, we have to solve the problem how to decide the steering reactive torque gain. Therefore, in the present paper, the driving simulator experiments which simulate the actual driving environment are performed to verify the effect of the steering reactive torqueo the driving behavior and the subjective evaluation.
Toshihiro Shinohara 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
In this paper, an expression method of each individual woven yarn of textile fabric is proposed for structure analysis of textile fabric on its three-dimensional (3D) image obtained by X-ray computed tomography (CT) images. In this method, the voxels of the 3D CT image is segmented into each yarn based on the yarn positional information, which is the sequence of the yarn center points. In order to extract the yarn positional information, the directions of the filaments are firstly estimated at all the voxels of the 3D CT image by correlating the voxel values with a filament model. Each filament is secondly reconstructed by connecting the voxels of the filaments based on the estimated filament directions. Each yarn is then reconstructed by binding up the reconstructed filaments using a newly defined distance between two filaments. Finally, the yarn positional information is obtained by thinning the reconstructed yarns. The voxels of the 3D CT image is segmented into each yarn based on a newly defined dissimilarity to the extracted yarn positional information. Using the segmented voxels, each individual yarn is expressed with volume rendering. The effectiveness of the proposed yarn expression method is discussed by experimentally applying this method to 3D image of a plain knitted fabric.
TOSHIHIRO ONA,AKI YOSHIOKA,YASUO KOJIMA,TERUYUKI SEINO,MIHO MIZUMOTO,HIDEO NOZAKI,YASUYUKI ISHIDA,HAJIME OHTANI 한국펄프·종이공학회 2006 한국펄프종이학회 기타 간행물 Vol.- No.-
Pyrolysis-gas chromatography (Py-GC) in the presence of organic alkali of tetrabutylammonium hydroxide (TBAH) was applied to characterize the polyphenol fragments with a carbonyl group causing different magnitude of photoyellowing in chemithermomechanical pulp (CTMP) papers. Two different origin of CTMP papers prepared from different individuals of Eucalyptus globulus trees showing high and low yellowing after photo-irradiation was compared before photo-irradiation. As a result, 7 peaks assigned to a series of phenol compounds with a carbonyl group, derived mainly from lignin, gave significant amount of phenol compounds with a carbonyl group for the paper sample of latent high yellowing, i.e., butoxy- and syringaldehyde, butoxy- and syringylacetone, butoxy-acetoguaiacone, butoxy-acetosyringone, butoxy-acetoethylsyringone, 3-methoxy-4-butoxy butyl ester, and 3,5-dimethoxy-4-butoxy butyl ester, using Py-GC/mass spectrometry (MS). The Py-GC method combined with TBAH successfully characterized polyphenol fragments with a carbonyl group causing differ high photo-yellowing in CTMP papers using a microgram order of samples.
Usefulness of Colored 3D Imaging of Respiratory Impedance in Asthma
Toshihiro Shirai,Kazutaka Mori,Masashi Mikamo,Yuichiro Shishido,Takefumi Akita,Satoru Morita,Kazuhiro Asada,Masato Fujii,Takafumi Suda,Kingo Chida 대한천식알레르기학회 2013 Allergy, Asthma & Immunology Research Vol.5 No.5
Purpose: Recently, the clinical application of the forced oscillation technique (FOT) has progressed with the spread of commercially available FOT devices, including the impulse oscillation system and MostGraph. We investigated the usefulness of color 3D imaging of respiratory impedance in asthma using MostGraph. Methods: Whole-breath and within-breath respiratory system resistance (Rrs) and reactance (Xrs) were measured in 78 patients with asthma. Color 3D images were classified into three patterns: the chronic obstructive pulmonary disease (COPD)-like pattern (high values of Rrs and Xrs with a marked respiratory cycle and frequency dependence), the asthma pattern (moderately high Rrs over the entire frequency and a respiratory cycle with slight Xrs changes), and a normal-like pattern (low Rrs and Xrs with few within-breath changes). The classification was performed by three researchers, who were unaware of the clinical information, and the clinical characteristics were compared among the three groups. Results: Color 3D imaging provided a COPD-like pattern in 25 patients, an asthma pattern in 39 patients, and a normal-like pattern in 14 patients. Patients with the COPD-like pattern were predominantly female with a higher body mass index, lower forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC), and higher Rrs and Xrs values (whole-breath and within-breath variation). Those with the normal pattern had higher FEV1 and FVC, and a lower single-breath nitrogen washout slope. There were no differences in asthma control or exhaled nitric oxide levels among the three groups. Conclusions: These results suggest that color 3D imaging of respiratory impedance may show asthma phenotypes.
Automatic Weave Diagram Construction from Yarn Positional Information of Weft-knitted Fabric
Toshihiro Shinohara 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, a novel automatic construction method of a weave diagram using yarn positional information of a weft-knitted fabricis proposed. The yarn positional information is a sequence of the centerpoints of the yarn in this study, which is obtained using a yarn tracing method proposed in my previous study. Constructing a weave diagram corresponds to identifying the stitch type at each stitch of the knitted fabric. For constructing a weave diagram, first, the position of each stitchis detected by in vestigating the cross points between the yarns. Then, the types of stitches are identified by investigating which stitch the stitch intersects with. The validity of the proposed automatic weave diagram construction method is confirmed by experimentally applying the method to yarn positional infomation of a plain knitted fabric.
Real-time Path Planning Method for Multiple UASs
Toshihiro Takebayashi,Makiko Ishii,Shin-Ichiro Higashino 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
The authors have proposed a method for the path planning of an Unmanned Aircraft System (UAS) and the simultaneous optimization of task assignment for multiple UASs using Evolutionary Computation (EC). This paper present a fast path planning method named Simplified Rule-Base EC hybrid (SRBEC) method and a fast task assignment method named Radial Segmentation Task Assignment (RSTA) method in order to use in real time. It also reports the results of the real-time simulations for the evaluation of RSTA and SRBEC methods.