- 著者
- Yusuke Yano Kazuha Ishida Jianqing Wang Takeshi Ishida
- 出版者
- The Institute of Electronics, Information and Communication Engineers
- 雑誌
- IEICE Communications Express (ISSN:21870136)
- 巻号頁・発行日
- vol.12, no.9, pp.457-463, 2023-09-01 (Released:2023-09-01)
- 参考文献数
- 6
Focusing on the TLP (transmission line pulse) method used for ESD (electrostatic discharge) saturation measurement described in IEC 62228-5 Annex E, we investigated the validity of its measurement conditions. Since there is no provision for the cable length between a TLP test system and a device under test, we investigated the influence of the cable length on the ESD saturation measurement. The result shows that different voltage and current waveforms in the measurement time window, i.e., different I/V characteristics, can be obtained due to the cable propagation delay. This paper proposes a method to correct the influence of the cable length by using the rising edge of the reflected wave observed at the TLP test system as a trigger for the measurement time window.
- 著者
- Takeshi Higuchi Yusuke Yano Tadahiro Aita Seiichi Takami Tadafumi Adschiri
- 出版者
- 公益社団法人 化学工学会
- 雑誌
- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN (ISSN:00219592)
- 巻号頁・発行日
- vol.46, no.10, pp.709-715, 2013-10-20 (Released:2013-10-20)
- 参考文献数
- 17
- 被引用文献数
- 2 3
Simulation of polymerization-induced phase separation of a polymer gel from a multifunctional monomer was carried out using the phase field method. To describe the driving force for phase separation, the interfacial energy between the polymeric phase and the aqueous phase was assumed to depend positively on the degree of polymerization, while the thickness of the interface at equilibrium and the mobility were assumed to depend negatively on it. The mobility was also assumed to depend negatively on the volume fraction of the polymer. A sigmoidal function was introduced to describe the nonlinear dependence of the mobility on the volume fraction. The wavelength of phase separation became finer as the polymerization rate increased when the rate of the reaction had a time scale similar to that of diffusion. When a nonreactive polymer coexists in the phase separation, the wavelength of phase separation shrinks because of suppression of diffusion caused by the coexisting polymer. These results qualitatively agreed with the experimental results for macroporous silica prepared via polymerization-induced phase separation.