Integration of Case-Frame Dictionary into Machine Learning Techniques for Semantic Role Assignment of Korean Adverbial Cases

Maste

휴대형 시스템을 위한 저전력 CMOS 마이크로컨트롤러 코어의 설계

학위논문(석사) - 한국과학기술원 : 전기및전자공학과, 1998.2, [ iv, 58 p. ]The recent growth in portable systems that require a large amount of control processing demands a microcontroller with both high performance and low power dissipation. Since the memory in microcontroller systems dominates the total power dissipation, it is very important to design a microcontroller that reduces memory accesses as well as the power dissipated by the microcontroller itself. This thesis suggests a RISC microcontroller core architecture, which minimizes memory data transfer by employing an efficient 16-bit fixed length instruction set and by allowing data to be transferred in 8-, 16-, or 32-bit size for load/store instructions. Many other low-power design techniques that have been proposed by previous works are also introduced in it. The impacts of the new instruction set architecture on power reduction are evaluated by comparing the instruction count of Dhrystone 1.1 code with those of other microcontrollers. Comparing the estimated capacitance of the synthesized decode circuit with the capacitance associated with memory transfer reveals that the additional decoding overhead is not so great against the gain in code size.한국과학기술원 : 전기및전자공학과

Properties of Si-AlN Core-Shell Microcrystals by Al-Based Nanostructures

육방정계 (hexagonal) Si-AlN 코어-쉘 (core-shell) 마이크로 결정을 혼합소스 수소화물기상법에 의해 성장하였다. 특히 육방정계 Si-AlN 코어-쉘 마이크로 결정은 Al 기반 나노구조 (Al-based nanostructure)를 기반으로 성장되는 것을 발견하였다. 육방정계 Si은 준 직접 밴드갭 (quasi-direct bandgap) 에너지를 가지며 AlN 또한 육각형 우르자이트 (wurtzite) 구조를 가지므로 전력반도체 혹은 광전소자에 대한 새로운 기회를 열 수 있다. 본 논문에서 성장된 육방정계 Si-AlN 코어-쉘 마이크로 결정은 주사전자현미경 (FE-SEM), EDS, 및 HRTEM을 사용하여 그 특성을 확인하였으며 성장 메커니즘을 제시한다. 따라서 육방정계 Si-AlN 코어-쉘 마이크로 결정은 반도체 성장 방법의 새로운 예가 될 것으로 기대한다. Hexagonal Si-AlN core-shell microcrystals were grown by the mixed-source hydride vapor phase method. In particular, it was found that the hexagonal Si-AlN core-shell microcrystals were grown by the role of the Al-based nanostructure. Since hexagonal Si has a quasi-direct bandgap energy and AlN also has a hexagonal wurtzite structure, it can open up new opportunities for power semiconductors or optoelectronic devices. In this paper, the hexagonal Si-AlN core-shell microcrystals grown were characterized using scanning electron microscopy (FE-SEM), EDS and HRTEM, and the growth mechanism is presented. Therefore, the hexagonal Si-AlN core-shell microcrystal is expected to be an example of a new method in the field of semiconductor growth. © New Physics: Sae Mulli.TRU