Traveling Wave Characteristic of Induced Voltage on Buried Cable by Direct Lightning

This paper desbribes a numerical method to calculate the traveling wave characteristic of induced voltage on a buried cable generated by direct lightning. The propagation constant of the metallic sheath--earth circuit is calculated by considering the thickness of the protection jacket. The mutual impedance of every coupling circuit is calculated by using the electromagnetic theory. The numerical processing is carried out by the inverse Laplace transform. Finally, some numerical examples are presented

本学ヘリカルCT(ProSpeed F II)における距離計測の精度評価

In order to evaluate image precision of a computed tomography (CT), acrylic and glass cubes soaked in the water were scaned and length was measured on a constructed image. The following conclusions were obtained from the above-mentioned results: 1. Length is different from that of the actual size according to software used for measurement in some cases. 2. Length of glass cubes with a high CT number tends to be measured longer than the actual one in comparison with acrylic cubes. 3. An error is apt to occur in the peripheral part due to the partial volume effect. 4. Difference in precision in the Z axis direction caused by the scan method is not observed. 5. Increase of errors towards the Z axis direction accompanying movement of the table is within the allowable range but should be considered clinically

Optical characterization of point defects on internal quantum efficiency in AlGaN quantum wells grown on face-to-face-annealed sputtered AlN templates

The correlation between the internal quantum efficiency (IQE) and the effective diffusion length estimated by the cathodoluminescence intensity line profile near the dark spots, including the effect of non-radiative recombination due to point defects, was experimentally clarified for AlGaN multiple quantum wells (MQWs) on face-to-face annealed (FFA) sputter-deposited AlN templates with different IQEs and similar dislocation densities. The IQEs, which were determined by temperature- and excitation-power-dependent photoluminescence measurements, were independent of the dark spot densities and increased with increasing effective diffusion length (Leff) estimated from the cathodoluminescence line profile analysis. These results suggested that the IQEs of the MQW/FFA samples were governed by the point defect density. The fitting results for the relationship between IQE and Leff and for that between IQE and Cmax explained the experimental results qualitatively

Chronic Hepatitis C Virus Infection is Associated with More Severe Asthma

Background: Chronic hepatitis C virus (HCV) infection causes intra- and extra-hepatic complications. The elimination of HCV has been reported to be beneficial for asthmatic patients with HCV infection. Therefore, we hypothesized that chronic HCV infection might be associated with the severity of asthma. Methods: Asthmatic patients were prospectively enrolled from 13 outpatient settings. Hepatitis B surface (HBs) antigen and HCV-RNA were measured at the time of enrollment and evaluated along with the clinical characteristics of the patients including the age, sex, duration of asthma, atopic status, smoking history, and treatment step according to the Global Initiative for Asthma guideline. Results: Of 1327 asthmatic patients, 1258 patients (94.8%) were treated with inhaled corticosteroids, 18 patients were positive for HBs antigen (1.4%), and 32 patients (2.4%) were positive for HCV-RNA. When compared with HCV-RNA-negative patients, HCV-RNA-positive patients required significantly more drugs for the treatment of asthma. No such relationship was observed in patients with positive HBs antigen. A multivariate logistic regression analysis showed that the male sex, a long duration of asthma, status as a current smoker, and HCV-RNA positivity were independently associated with more severe asthma. Conclusions: These results suggest that chronic HCV infection is an independent factor that predisposes asthmatic patients to more severe asthma. The evaluation of chronic HCV infection may be helpful for the management of severe asthmatic patients without obvious factors associated with severe asthma

Islamic Center

This is a photograph taken of the Islamic Center and Mosque in Bowling Green, KY.https://digitalcommons.wku.edu/bg_relgion/1007/thumbnail.jp