新しいBridge Weigh-in-Motionの開発と道路構造物の維持管理支援に関する研究

名古屋大学Nagoya University博士(工学)Fatigue damages have been actualized in highway structures in Japan. Truck load contributes to fatigue damage of bridges or pavements. Thus, control or traffic load is essential to sustainable maintenance on highway structures. Weigh-in Motion (WIM) are used for control and monitoring of the weight of trucks on highway. However, the number of WIM in Japan is not sufficient to control overloaded trucks. Bridge Weigh-in-Motion, which uses bridge members as a scale for truck load, is the alternative methods to WIM. Traditional BWIM methods required influence line of the bridge member, sensor for detecting of axle arriving time. Therefore, measurement and analysis procedure were more complicated than WIM. The objectives of this study are to establish new BWIM methods, to analyze the effect of truck load on fatigue damage of highway structures, and to show the availability of BWIM on maintenance of highway structures by case studies. Two BWIM methods, Influence area method and Reaction force method, were developed and tested on highway bridges. Influence area method can calculate gross vehicle weight by influence area, which is calculated from the integration of response wave at bridge members. Feasibility studies for the method were carried out on a Warren truss bridge and steel plate girder bridges. The Reaction force method detects axle loads from difference of strain wave at the end vertical stiffeners of simple supported plate girder bridges. These new methods have advantages of simple measurement, calibration and calculation. Truck load survey was carried out in steel plate girder bridges by BWIM. Fatigue damages were calculated for the each truck using Rain-Flow Counting Method and Miner and Miner’s rule. The factors of truck type and load condition in fatigue damages were investigated and discussed. Surveys of overloaded trucks, which could cause maximum stress on bridge girders, were carried out in two bridges. The stresses at the lower flange of main girders and truck loads by Influence area method were measured simultaneously. Truck cranes were observed when the maximum stress was recorded. Traffic load monitoring and vibration monitoring were carried out simultaneously in a viaduct. The single truck load conditions where only one truck existed on the viaduct were extracted from truck load records obtained by Reaction force method. The acceleration responses of bridge and ground to the single truck load were discussed. The effects of the truck type, load, and vehicle speed in vibration level and peak-acceleration value were described. A truck traffic survey on a national road was carried out by Reaction force method. BWIM was used as an alternative method of traffic survey. The results showed that many trucks used the national road as a by-pass route for expressway at night.名古屋大学博士学位論文 学位の種類:博士(工学) (論文) 学位授与年月日:平成18年3月27日doctoral thesi

Upper Bound on the Decay τ→μγ from the Belle Detector

journal articl

EXTENDED LIE GEOMETRY, EXTENDED PARABOLIC LIE GEOMETRY, EXTENDED EQUIFORM LAGUERRE GEOMETRY AND EXTENDED LAGUERRE GEOMETRY AND THEIR REALIZATIONS IN THE DIFFERENTIABLE MANIFOLDS. I

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Theoretical assessment of soil-structure interaction effect at bridge structure

In order to develop a simple practical means for asssessing the effects of dynamic soilstructure interaction especially on bridge structures, this paper describes a theory of single-degree-of-freedom system which is equivalent to the single-support bridge model and the multiple-suppυrt bridge model where each foundation is modeled as a rigid embedded founudation with a mass and a mass moment of inertia. having two-degree-of-freedom with swaying and rockiug motions. To illustrate charactristics and applications in the seismic design of the theory described in this paper, the natural period and the damping ratio of a three-span-continuous steel girder bridge with different foundation size are evaluaed

ダウン症児の発話の聴取 : 教育実習生の場合

application/pdfダウン症児の発話内容の理解のためには、ダウン症児自身の側の発話条件の改善のみならず、周囲の人々のダウン症児に対する「かかわり方」の改善も重要である。本研究は教育実習生の場合につき、この「かかわり方」の検討を行い、その改善策についての示唆を得ることを目的とした。教育実習生を調査対象として、教育実習の前後に、彼らにダウン症児による発話を録音したテープを聴かせ、理解できた発話内容についての記録を求め、これと教育実習中のダウン症児との「かかわり方」とを関連づけて考察した。この結果、発音の不明瞭なダウン症児であっても、周囲の者が意識的、積極的に働きかけ、聴き取ろうとする姿勢をもつことによって、ダウン症児の発話内容の聴取が改善される余地が残されていること、また、発話者との直接的なかかわりがなくとも、他のダウン症児との濃密なかかわりを通して、その発話者の発話内容の聴取が改善されること、などが示唆された。departmental bulletin pape

研究速報 : バーナ拡散火炎の数値シミュレーション : 乱流拡散火炎LES解析手法の構築

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Distribution of propensity scores prior to and after matching.

<p>Mean propensity score (PS) before matching was 0.69 (SD = 0.20) in the chemotherapy-treated group and 0.28 (SD = 0.20) in the non-treated group (p<0.0001). After matching, it was 0.43 (SD = 0.25) in the chemotherapy-treated group and 0.42 (SD = 0.25) in the non-treated group (p = 0.22).</p

Overall survival (OS) and distant disease-free survival (DDFS) according to adjuvant chemotherapy prior to and after matching via propensity scores.

<p>HR: hazard ratio.</p

Supplementary Figure 1 from Establishment and Validation of Circulating Tumor Cell–Based Prognostic Nomograms in First-Line Metastatic Breast Cancer Patients

PDF file - 51K, Calibration plots of PFS at (A) 6 months and (B) 2 years and OS at (C) 1 year and (D) 5 years in both cohorts. Cox predictions were averaged at 2 years within the quintiles of the ordered predictions. Within each quintile, the unadjusted probability of death using Kaplan-Meier survival estimators was estimated. We then plotted unadjusted versus model average predictions. The red line corresponds to the perfect prediction.</p

Prognostic Impact of Time to Ipsilateral Breast Tumor Recurrence after Breast Conserving Surgery

<div><p>Background</p><p>The poor prognosis of patients who experience ipsilateral breast tumor recurrence (IBTR) after breast conserving surgery (BCS) is established. A short time between primary cancer and IBTR is a prognostic factor but no clinically relevant threshold was determined. Classification of IBTR may help tailor treatment strategies.</p><p>Purpose</p><p>We determined a specific time frame, which differentiates IBTR into early and late recurrence, and identified prognostic factors for patients with IBTR at time of the recurrence.</p><p>Methods</p><p>We analyzed 2209 patients with IBTR after BCS. We applied the optimal cut-points method for survival data to determine the cut-off times to IBTR. A subgroup analysis was performed by hormone receptor (HR) status. Survival analyses were performed using a Cox proportional hazard model to determine clinical features associated with distant-disease-free survival (DDFS) after IBTR. We therefor built decision trees.</p><p>Results</p><p>On the 828 metastatic events observed, the majority occurred within the first 3 months after IBTR: 157 in the HR positive group, 98 in the HR negative group. We found different prognostic times to IBTR: 49 months in the HR positive group, 33 in the HR negative group. After multivariate analysis, time to IBTR was the first discriminant prognostic factor in both groups (HR 0.65 CI95% [0.54–0.79] and 0.42 [0.30–0.57] respectively). The other following variables were significantly correlated with the DDFS: the initial number of positive lymph nodes for both groups, the initial tumor size and grade for HR positive tumors.</p><p>Conclusion</p><p>A short interval time to IBTR is the strongest factor of poor prognosis and reflects occult distant disease. It would appear that prognosis after IBTR depends more on clinical and histological parameters than on surgical treatment. A prospective trial in a low-risk group of patients to validate the safety of salvage BCS instead of mastectomy in IBTR is needed.</p></div