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최해욱,Choi, Hae-Wuk 한국기술사회 2005 技術士 Vol.38 No.4
In these days, managing city's garbage is one of important environmental policy to be solved. Accordingly, I try to suggest to manage garbage and apply an energy source with conversing city's garbage into alternative energy.
기술사마당 - 도시 쓰레기 소각에서 발생하는 다이옥신으로부터 국민건강을 지키자
최해욱,Choi, Hae-Wuk 한국기술사회 2013 技術士 Vol.46 No.2
The treatment of city life wastes is headache problem. Now, only small portion of burnable wastes is burnt at modern process incinerators, the other large portion is buried in the soil by landfill method. The burnable wastes will be increased year by year. The dioxin, the cancer-causing agent, produced by incineration of wastes influences harmful effect to national human health. The new idea of burnable wastes treatment is using the city life wastes as auxiliary fuel of fluidizing bed combustion boiler of large scale coal-fired power plant. The dioxin-free treatment of burnable wastes is sucessfully achieved by burning the wastes, in flyash storm at fluidizing bed combustion boiler.
최해욱,Choe, Hae-Uk 한국전자통신연구원 1986 전자통신 Vol.8 No.4
시스팀의 소형화, 성능향상, 비용절감, 신뢰성 향상, know-how 보존 등 경쟁력 강화에 필수적인 시스팀의 custom IC화 추세에 따라 당 연구소에서 개발된 TDX-1 교환기에 쓰이는 custom IC 2종 (MUX/DMX IC)의 설계기술 개발내용, 의의및 기대효과, 향후추진방향 등을 기술하였다.
주파수 호핑방식 무선 LAN의 PLCP 계층 회로 설계
최해욱,김경수,기장근,조현묵 한국통신학회 1998 韓國通信學會論文誌 Vol.23 No.8
본 논문은 IEEE 802.11 주파수 호핑방식 무선 LAN 규격에 적합한 프로토콜 프로세서 설계 연구의 일환으로, 물리계층의 PLCP(Physical Layer Convergence Protocol) 프로토콜 기능을 하드웨어로 설계하였다. 설계 환경으로는 UNIX 환경하에서 COMPASS 틀을 사용하였으며, $0.8\mu\textrm{m}$ CMOS 공정인 cmn8a technology를 이용하였다. 결과적으로 사용된 전체 게이트 수는 약 6300 게이트 정도이며, 전체 칩 면적은 약 $2.5{\times}2.5mm^2$ 정도이다. 개발된 PLCP 부계층 회로는 IEEE 802.11 무선 LAN 주파수 호핑방식 규격에서 규정한 내용을 만족시키도록 설계되었으며, 전송속도는 1Mbps를 갖는다. 설계된 회로의 기능 검증을 위해 COMPASS 틀 상에서 2개의 PLCP 칩을 상호 연결한 회로를 구성하고 시뮬레이션을 통해 데이터를 송수신 하도록 함으로써 모든 기능이 정상적으로 동작함을 확인하였다. In this paper, hardware circuit that performs functions of IEEE 802.11 wireless LAN frequency hopping PLCP protocol is designed using 0.8 um CMOS cmn8a technology of the COMPASS. Transmission rate of the designed hardware is 1Mbps. The designed circuit have about 6300 gates and $2.5{\times}2.5mm^2$ area. In order to verify the circuit, two PLCP circuits are interconnected and frames are transmitted from one PLCP circuit to the other PLCP circuit. As a results of the simulation, we conclude that the designed PLCP circuit works well as the IEEE 802.11 standard specification.
Silk Fibroin 막에 관한 연구(I) -Silk Fibroin막의 구조특성-
최해욱,박수민,김경환 한국염색가공학회 1994 韓國染色加工學會誌 Vol.6 No.1
Silk fibroin was dissolved in 9.3 M LiBr aqueous solution at 4$0^{\circ}C$ for 1 hour. The dissolved silk fibroin was regenerated by casting the dialyzed solution into the membrane. The freshly prepared silk fibroin membrane was soluble in water and was. mainly consisted of random coil conformation. By the treatments in saturated water vapor at 3$0^{\circ}C$ and in 75% ethanolic aqueous solution (V/V), the insoluble membranes were obtained and the structure and morphology of those were investigated for the structure by means of X-ray diffraction analysis, infrared spectroscopy, thermal analysis. Rheovibron and scanning electron micrograph. Silk II type crystals were obtained by treating amorphous silk fibroin membrane in the random coil conformtion with 75% ethanol solution(V/V). Crystallization to silk II type crystals occured even after a few minutes, and a large number of silk II type crystals were formed after 30 mins. On the other and, the membrane treated in saturated water vapor was composed of the mixtures of silk I and silk II type crystals. A large number of silk I and silk II type crystals were formed after 24 hours. The micro brownian motion in the amorphous regions of silk fibroin membrane started at about 175~185$^{\circ}C$. $\alpha$ dispersion appeared at about 20$0^{\circ}C$ in the amorphous membrane, and at about 22$0^{\circ}C$ in the crystalline membrane. The crystallization of random coil conformation to silkII type crystals occured at about 215$^{\circ}C$. The surface, bottom and cross-section of the membranes were observed by scanning electrom microscope. Fine forms alike spherulites appeared at the surface of crystalline membrane.