• 전기의세계
• /
• v.28 no.8
• /
• pp.8-12
• /
• 1979

이글은 다음과 같이 구성되어 있다. 1. 머릿말 2. 열자극전류의 기본원리 3. TSC 측정방법 4. 쌍극자분극 5. 포획, 공간전하 6. 이온 공간전하분극 7. 결론

• Electrical & Electronic Materials
• /
• v.7 no.5
• /
• pp.383-388
• /
• 1994

Deep levels in semi-insulating GaAs were observed by thermally stimulated current(TSC) measurement In the temperature ranges of 100-300K Tl(E$\_$c/-0.18eV), T2(E$\_$c/-0.20eV), T3(E$\_$c/-0.31eV), T4(E$\_$c/-0.40eV), and T5(E$\_$c/-O.43eV) traps have been observed. The TI, T2, and T5 traps seem to be related to the V$\_$As/, V$\_$Ga/-complex, and As$\_$Ga/$\^$++/ respectively. T4 trap is considered with respect to V$\_$Ga/-V$\_$As/ complex.

• Journal of Radiation Protection and Research
• /
• v.7 no.1
• /
• pp.49-55
• /
• 1982

Thermally stimulated currents of polymers have some properties as radiation dosimetry, especially polymer could be made as a good dosimeter in biological fields because of tissue equivalent material. We experimented the radiation response of polymers and attempted to apply it in clinical use. Polymers have the properties of thermoluminescence and thermally stimulated currents which are due to several kinds of charged particles such as dipoles, electronic trapped charges and mobile ions. Several peaks are datected in the thermally stimulated currents in polyethylene under vias field V, by heating from room temperature to $100^{\circ}C$ shortly after irradiation. As V increases, both the peak temperature $T_m$ and the activation energy H decreases, while the peak current $I_m$ increases. We plotted the $T_m-V\;and\;I_m-V$ curves and calculated the electron trap depth with the recombination operative TSC theory and compared the peak TSC with radiation doses.

• Proceedings of the KIEE Conference
• /
• 1979.08a
• /
• pp.59-62
• /
• 1979

• Proceedings of the KIEE Conference
• /
• 1985.07a
• /
• pp.198-200
• /
• 1985

• Proceedings of the KIEE Conference
• /
• 1982.07a
• /
• pp.189-191
• /
• 1982

• Proceedings of the KSMRM Conference
• /
• 2002.11a
• /
• pp.99-99
• /
• 2002

목적： 인체에 전류를 주입하면 체내의 생체조직의 임피던스 분포에 따라서 전류밀도 분포가 결정된다. 이러한 전류밀도 분포에 대한 정보는 전기임피던스 단층촬영법과 유방암 진단, 체내 온도 분포의 영상화, 전기자극에 의한 체내 전류 경로의 시각화에 대한 연구에 응용될 수 있다. 한편 이러한 전류밀도 분포는 전류주입 자기공명영상기법에 의해 영상화할 수 있으며, 본 논문은 3차원 팬텀 내부의 전류밀도 분포를 영상화하는 전류주입 자기공명영상기법의 실험결과를 기술한다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 1989.06a
• /
• pp.62-62
• /
• 1989

• Journal of Biomedical Engineering Research
• /
• v.23 no.4
• /
• pp.287-293
• /
• 2002

For non-contact nerve stimulations using time varying magnetic field, high amplitude current pulses have to be applied to a magnetic nerve stimulation coil. To increase the magnetic stimulation frequency we have to increase both power supply capacity and cooling capacity of the magnetic nerve stimulator. To alleviate these problems. we propose a new magnetic nerve stimulation coil design methods. Utilizing magnetic mirror effect of a ferro-magnetic plate attached to a magnetic stimulation coil. we have improved efficiency of the stimulation coil. We have analyzed magnetic mirror effect for various kinds of stimulation coils using the finite element method, and we present experimental results obtained with several kinds of stimulation coils.

• Proceedings of the KIEE Conference
• /
• 1987.07a
• /
• pp.349-352
• /
• 1987