- 著者
- Kenji Nakahama Hiroyasu Kaneda Koichi Ogawa Yoshiya Matsumoto Yoko Tani Tomohiro Suzumura Shigeki Mitsuoka Tetsuya Watanabe Kazuhisa Asai Tomoya Kawaguchi
- 出版者
- The Japanese Society of Internal Medicine
- 雑誌
- Internal Medicine (ISSN:09182918)
- 巻号頁・発行日
- vol.61, no.7, pp.1039-1042, 2022-04-01 (Released:2022-04-01)
- 参考文献数
- 16
- 被引用文献数
- 3
A 68-year-old Japanese man was diagnosed with lung adenocarcinoma stage IVB. We introduced a first-line chemotherapy of four cycles of carboplatin and pemetrexed and pembrolizumab, followed by pemetrexed and pembrolizumab maintenance therapy. Approximately four months after anticancer therapy, a small nodule appeared in the right peripheral S3 lesion. After five months, the nodule was confirmed as a Mycobacterium tuberculosis (TB) nodule. We initiated anti-TB therapy without stopping pembrolizumab, and the right S3 nodule shrank immediately. This report supports the concurrent use of anti-TB treatment with an immune checkpoint inhibitor when the TB infection area is limited.
1 0 0 0 A Waffle-Iron Ridge Guide with Combined Fast- and Slow-Wave Modes for Array Antenna Applications
- 著者
- Hideki KIRINO Kazuhiro HONDA Kun LI Koichi OGAWA
- 出版者
- The Institute of Electronics, Information and Communication Engineers
- 雑誌
- IEICE Transactions on Communications (ISSN:09168516)
- 巻号頁・発行日
- vol.E101.B, no.2, pp.349-356, 2018-02-01 (Released:2018-02-01)
- 参考文献数
- 15
- 被引用文献数
- 1
A new Waffle-iron Ridge Guide (WRG) structure that has the ability to control both wavelength and impedance is proposed. With the proposed structure, not only can the wavelength be controlled over a wide range for both fast- and slow-waves in free space but the impedance can also be controlled. These features can improve the performance of array antennas in terms of reducing grating lobes and side lobes. In this paper, we discuss and evaluate a design scheme using equivalent circuits and EM-simulation. This paper also discusses how the conductivity and dielectric loss in the WRG affect the total gain of the array antenna.
1 0 0 0 OA Competition and Collaboration between Japanese and Taiwanese Firms in Optical Disk Industries
- 著者
- Junjiro SHINTAKU Koichi NAKAGAWA Koichi OGAWA Tetsuo YOSHIMOTO
- 出版者
- グローバルビジネスリサーチセンター・東京大学MERC
- 雑誌
- Annals of Business Administrative Science (ISSN:13474464)
- 巻号頁・発行日
- vol.13, no.6, pp.353-367, 2014-12-15 (Released:2014-12-15)
- 参考文献数
- 16
- 被引用文献数
- 1 3
Historically, Japanese firms have been leading the optical disk industry in technological development and market development; however, Taiwanese and Korean firms are quickly catching up and have surpassed Japanese firms in terms of production volume. This paper focuses on the optical disk industry in Taiwan and analyzes the factors that have enabled Taiwanese firms to quickly catch up to Japanese firms. Our analysis show that cooperation with Japanese firms and international specialization have been the prerequisites of business activities in Taiwanese firms. This suggests that symbiotic relationships as well as competitive rivalries exist between firms in developed countries and those in developing countries that are quickly catching up.