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건설폐기물로 배출되는 폐 콘크리트 재활용의 실태분석 및 효율화 방안에 관한 연구
홍성욱(Hong Seong-Wook),박신(Park Shin),안용선(Ahn Yong-Sun) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.2
Recently, construction earth, waste of concrete, asphalt and wood are getting increased due to demolishing aged apartments and expanding social facilities in not only capital city but local areas. In this country, disposal of the waste concrete has been highly relied on just burying into the ground, whilst it is reported that the waste has been illegally dealt with by some related companies, due to the problems such as high deportation and disposal cost and deficiency of the filled-in ground for the waste concrete. As a result, many of construction waste seem to be getting increased in the near future because of the time for reconstructing the buildings made in 60's and 70's. In this research, we try to figure out actual condition on recycling wastes of concrete which may create many demand and high value through the inquiry of question and interview. Based on problems in recycling construction waste, we suggest the efficient way of recycling waste concrete produced from reconstruction.
STBC와 ARQ를 이용한 1-2-1 부호화 협력 통신
홍성욱(Seong-Wook Hong),공형윤(Hyung-Yun Kong) 한국전자파학회 2009 한국전자파학회논문지 Vol.20 No.5
본 논문에서 무선 센서 네트워크에 적용 가능한 시공간 블록 부호(Space-Time Block Coding: STBC)와 ARQ를 이용한 1-2-1 부호화 협력 통신 방식을 제안한다. 부호화 협력 통신은 협력 통신에 채널 부호화를 접목시킨 기술로 본 논문에서는 콘볼루션 부호화기를 사용한다. ARQ 방식은 소스 노드로부터 수신한 신호를 우선적으로 목적지 노드에서 평가하여 만족되어질 경우, ACK 메시지를 소스 노드와 릴레이 노드로 전송하고 수신한 신호를 복구하므로 기존의 협력 통신에 비해 주파수 효율을 높일 수 있다. 중계 노드 1과 2는 소스로부터 수신한 신호를 펑처링하여 목적지로 전송하는데, 이때 STBC 기술을 적용하여 프로토콜의 신뢰성을 높인다. 또한, 간단한 비교기를 통하여 우수한 BER 성능을 얻을 수 있다. 마지막으로 제안한 프로토콜을 레일리 페이딩과 AWGN를 고려한 Monte-Carlo 시뮬레이션을 통해 BER 성능을 검증하였다. This paper has proposed 1-2-1 coded cooperative communication that is a combination of STBC and ARQ. Coded cooperative communication is a protocol that integrates channel coding with cooperative communication. In this paper consider convolution encoder. ARQ method can increase the spectral efficiency than conventional cooperative communication because if the received signal from source node is satisfied by the destination preferentially, the destination transmits ACK message to both relay node and source node and then recovers the received signal. Where each relay 1, 2 forwards a punctured portion of receive data. When relay transmit to destination apply STBC the reliability to increase. Moreover this protocol can get better BER performance of receiver using simple comparator. We verified BER performance for the proposed protocol through Monte-Carlo simulation over Rayleigh fading plus AWGN.
임상연구 : Remifentanil과 Ketamine 전투여가 Propofol 정주 시 발생되는 혈관통에 미치는 영향
홍성욱 ( Seong Wook Hong ),곽경화 ( Kyung Hwa Kwak ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.3
Background: There is a high incidence of pain associated with an intravenous injection of propofol, and different methods have been used in an attempt to minimize the incidence and severity of this pain. This study compared the effect of a ketamine pretreatment with that of a remifentanil pretreatment on the pain associated with a propofol injection. Methods: 225 ASA physical status 1-2 adult patients scheduled for elective surgery were enrolled into this randomized double blind study. The patients received 2 ml of saline (n = 45), 2 ml of ketamine 20 mg (n = 45), 2 ml of remifentanil 0.01 mg (n = 45), or 2 ml of remifentanil 0.02 mg (n = 45) or 2 ml of remifentanil 0.03 mg (n = 45) 30 seconds prior to administering 2 mg/kg of 1% propofol. An anesthesiologist who was blinded to the study asked the patients to evaluate the pain using a four-point scale (none, mild, moderate, severe). Results: The remifentanil 0.02 mg, remifentanil 0.03 mg and ketamine groups showed significantly less frequent and intense pain than the saline group (P < 0.05). The remifentanil 0.02 mg and 0.03 mg provided as much pain relief as ketamine (P > 0.05), but the remifentanil 0.01 mg did not (P < 0.05). There was a similar incidence of injection pain in the remifentanil 0.02 mg and remifentanil 0.03 mg groups. Conclusions: An intravenous remifentanil 0.02 mg or remifentanil 0.03 mg pretreatment is as effective in alleviating the pain associated with a propofol injection as a intravenous ketamine pretreatment. The remifentanil 0.03 mg pretreatment had a similar analgesic effect relative to the remifentanil 0.02 mg pretreatment. (Korean J Anesthesiol 2006; 51: 302~7)
증례보고 : 관상동맥 우회술 중 내시경하 복재정맥 수확동안 발생한 과탄산혈증
홍성욱 ( Seong Wook Hong ),김시오 ( Si Oh Kim ),백운이 ( Woon Ei Baek ),이종태 ( Jong Tae Lee ),조준용 ( Jun Yong Cho ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.5
Hypercarbia is a potential complication during laparoscopic surgery. However, is more likely to occur in extraperitoneal surgery than in intraperitoneal surgery because insufflated CO2 gas can diffuse easily into the surrounding tissues. We report the anesthetic course and complications encountered during endoscopic harvesting of a saphenous vein with CO2 insufflation in coronary artery bypass surgery. Although the surgery was successful, the patient developed signs and symptom of CO2 absorption: tachycardia, hypertension, hypercarbia and acidosis. Possible mechanisms are presented, along with a discussion of the prompt diagnosis and treatment. For the management of laparoscopic extraperitoneal surgery, care must be taken to monitor the CO2 insufflation pressure, perform a routine examination and palpation of the chest wall, use of N2O with caution, increase the level of ventilation to eliminate CO2, and excluding other causes of subcutaneous emphysema and hypercarbia. (Korean J Anesthesiol 2006; 51: 622~6)
장수명 공동주택 실용화를 위한 실험주택 공정분석에 관한 연구
홍성욱(Hong Seong-Wook),박승환(Park Seung-Hwan),김상원(Kim Sang-Won),안진경(An Jin-Kyung),손창백(Son Chang-Baek),이두진(Lee Doo-Jin),이명광(Lee Meoung-Kwang) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.7
Mock-up house has been analyzed based on the construction planning and scheduling for practicality of long life housing. The conclusion of the study are addressed as follows. In Support system, the working period of 1 cycle in apartment which was adjusted to FPWS(Flat Plate Wall System) has been decreased to 2 days, and the working period in long life housing has been decreased to 1 day than that was adjusted to bearing wall system (7days). In case of Infill system, the working period in apartment which was adjusted to FPWS(Flat Plate Wall System) has been decreased to 2 days, and the working period in long life housing has been decreased to 9 days than that was adjusted to bearing wall system (30days). The main reason for decreased period might be accepted that the Infill system was taken dry-ondol method process for flooring construction.