http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김효상,신원용,김동건,조재희,Kim, Hyo-Sang,Shin, Won-Yong,Kim, Donggeon,Cho, Jaehee 한국정보통신학회 2015 한국정보통신학회논문지 Vol.19 No.12
온라인 소셜 네트워크 서비스 중 하나인 트위터는 가장 보편적으로 사용되는 마이크로 블로그인데, 트위터의 개방적 구조로 인해 자동화 프로그램인 트윗 봇이 많이 생성되고 있다. 이 트윗 봇은 적법한 봇과 악성 봇으로 분류되는데, 이 중 악성 봇은 일반 사용자들에게 많은 양의 스팸 정보나 유해한 컨텐츠를 배포하기 때문에 트윗 봇을 검출하는 작업은 반드시 필요하다. 기존 연구에서는 시간적 정보를 활용하여 사람과 트윗 봇을 분류하였다. 본 논문에서는 사용자들의 고 정밀 위치 정보를 알려주는 공간 태그된 트윗 정보를 활용하여 트위터 사용자들의 정확한 위치와 트윗 전송시각을 알아낸 후, 각 사용자의 시공간 엔트로피를 계산하여 트윗 봇을 검출하는 개선된 두 단계 알고리즘을 제안한다. 주요 결과로써, 시간 정보만을 이용한 기존 연구결과보다 각 신뢰도별 봇 검출 확률 및 거짓 경보 확률이 모두 우수하게 나타난다. Twitter, one of online social network services, is one of the most popular micro-blogs, which generates a large number of automated programs, known as tweet bots because of the open structure of Twitter. While these tweet bots are categorized to legitimate bots and malicious bots, it is important to detect tweet bots since malicious bots spread spam and malicious contents to human users. In the conventional work, temporal information was utilized for the classficiation of human and bot. In this paper, by utilizing geo-tagged tweets that provide high-precision location information of users, we first identify both Twitter users' exact location and the corresponding timestamp, and then propose an improved two-stage tweet bot detection algorithm by computing an entropy based on spatio-temporal information. As a main result, the proposed algorithm shows superior bot detection and false alarm probabilities over the conventional result which only uses temporal information.
김효상(Hyo-Sang Kim) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
In this paper, we proposed the efficient fuzzy logic controller for single intersection which control the period of the traffic light according to the traffic load. In this algorithm, we defined two input linguistic variables (traffic load, the period of the green light) and inferenced the extension period of green light using by various fuzzy control rules. Because of considering both traffic load and present period of green light, the proposed algorithm has a dynamic adaptability for traffic load. using by various type of input traffic load function, the performance of proposed algorithm are estimated. From the computer simulation, we proved the proposed method tas a good adaptatility.<br/>
새로운 고주파 점화장치를 이용한 착화성 향상에 관한 연구
김효상(Hyo-Sang Kim) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
For fuel economy and pollutant reduction, the interests in lean burn has increased recently. The purpose of this research is to develop a new High Frequency Ignition System(NHIS) that can make powerful ignition. We studied relations between performance of NHIS and probability of inflammation under various ignition conditions. It is concluded that the portion of capacitance energy to the total energy is comparatively larger and that the optimum spark interval and spark duration are dependent upon conditions of Constant Volume Combustion Chamber.<br/>
임상 연구 : 입원 환자에서 발생한 중증 저나트륨혈증의 임상상 및 경과 분석; 간질환 유무에 따른 비교
김효상 ( Hyo Sang Kim ),이하정 ( Ha Jeong Lee ),박혜인조 ( Hayne Cho Park ),정지용 ( Ji Yong Jeong ),손민정 ( Min Jeong Son ),오국환 ( Kook Hwan Oh ),김연수 ( Yon Su Kim ),안규리 ( Cu Rie Ahn ),한진석 ( Jin Suk Han ),김성권 ( Suhng 대한신장학회 2008 Kidney Research and Clinical Practice Vol.27 No.6
목적: 간질환은 저나트륨혈증의 가장 흔한 원인 중 하나이며, 저나트륨혈증의 정도가 심할 경우 적절한 치료가 이루어지지 않으면 심각한 합병증이 발생할 수 있다. 이에 저자들은 중증 저나트륨혈증 환자의 발생 빈도와 임상상을 간질환의 유무에 따라 알아보고자 하였다. 방법: 2005년 1년 동안 3차 단일 의료 기관에 입원한 환자 중 저나트륨혈증이 관찰된 12,729명의 환자를 대상으로 후향적 연구를 진행하였다. 저나트륨혈증은 혈청 나트륨이 135 mmol/L 미만인 경우로, 중증 저나트륨혈증은 2회 이상 125 mmol/L 이하인 경우로 정의하였다. 결과: 저나트륨혈증이 확인된 12,729명의 환자 중 711명 (0.13%)에서 중증 저나트륨혈증이 관찰되었으며, 중증 저나 트륨혈증 환자 중 290명 (40.8%)은 간질환 환자였다. 중증 저나트륨혈증의 주된 원인은 간질환 환자군에서는 간부전 (69.7%)이었으며, 간질환이 없는 환자군에서는 과도한 저장성 수액 공급 (37.3%)이었다. 양 군 모두에서 고장성 식염수를 투여하는 것이 가장 흔히 사용된 치료 방법이었다. 간질환 환자군에서 입원과 퇴원 시 혈청 나트륨이 간질환이 없는 환자들보다 낮았으며 (입원 시 128.8±7.1, 퇴원 시 127.1±8.4 vs 132.1±7.5, 131.5±8.3 mmol/L), 중증 저나트륨혈증의 지속 시간도 간질환 환자군에서 더 길었다 (5일 vs 3일). 중증 저나트륨혈증에 대해 치료를 받은 589명의 환자 중 261명이 정상 나트륨 수준으로 교정되었으며, 교정된 비율은 간질환 환자군이 간질환 없는 환자들에 비해 낮았다. 결론: 간부전은 입원 환자에서 발생한 중증 저나트륨혈증의 가장 흔한 원인이었다. 간질환 환자에서 발생한 중증 저나트륨혈증은 간질환이 없는 환자들에 비해 나쁜 임상상을 보였다. Purpose: Liver disease is one of the most common causes of hyponatremia and improper management of severe hyponatremia may result in serious complications. We evaluated the prevalence and clinical characteristics of severe hyponatremic patients according to the presence of liver disease in hospitalized patients. Methods: We studied 12,729 hyponatremic patients during hospitalization in single tertiary referral hospital for 1 year. Hyponatremia was defined as serum sodium level <135 mmol/L and severe hyponatremia as ≤125 mmol/L at least twice. Results: Of 12,729 hyponatremic patients, 711 (0.13%) patients had severe hyponatremia and 290 (40.8%) patients with severe hyponatremia had liver disease. The main cause of severe hyponatremia was liver failure (69.7%) in patients with liver disease and excessive administration of hypotonic fluid (37.3%) in non-liver disease patients. The administration of hypertonic saline was the most common treatment both in liver and non-liver disease group. In severe hyponatremic liver disease patients, the serum sodium level was lower (128.8±7.1 at admission, 127.1±8.4 at discharge vs 132.1±7.5, 131.5±8.3 mmol/L) and the duration of severe hyponatremia (5 days vs 3 days) was longer than those in non-liver disease group. Of 589 patients with severe hyponatremic patients who had been treated for the sodium correction, 261 patients were recovered from severe hyponatremia to normal range of serum sodium, and lower correction rate was observed in liver disease group. Conclusion: Liver failure was the most common cause of severe hyponatremia in hospitalized patients. Severe hyponatremia in patients with liver disease had poor clinical outcomes.
김효상(Kim. Hyo-Sang),정동근(Jung. Dong-Keun),이광우(Lee. Kwang-Woo) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
At present car Voltage Regulators(DC28V100A) used in Korean armored car and bulldozer are assembled from the drawing used in America.<br/> Recently for years, Korean armored car Voltage Regulators returned<br/> from field were disassembled and analyzed,with the result that there were a lot of poor quality goods in the assembling part of Relay Assembly. In this research by analyzing the circuit drawing of Voltage Regulator, I want to remove the cause of poor quality goods and develop goods reducing cost.<br/>
김효상(Hyo-Sang Kim),김대현(Dae-Hyun Kim),한준희(Junhee Hahn),안효석(Hyo-Sok Ahn) 한국트라이볼로지학회 2011 한국윤활학회지(윤활학회지) Vol.27 No.4
Friction behavior of nanoporous anodic aluminum oxide(AAO) film was investigated. A 60 μm thick AAO film having nanopores of 45 nm diameter with 105 nm interpore-diatance was fabricated by mild anodization process. The AAO film was then saturated with paraffinic oil. Reciprocating ball-on-flat sliding friction tests using 1 mm diameter steel ball as the counterpart were carried out with normal load ranging from 0.1 N to 1 N in an ambient environment. The morphology of worn surfaces were analyzed using scanning electron microscopy. The friction coefficient significantly increased with the increase of load. The boundary lubrication layer of paraffinic oil contributed to the lower friction at relatively low load (0.1 N), but it is less effective at high load (1 N). Plastic deformed layer patches were formed on the worn surface of oil-enriched AAO at relatively low load (0.1 N) without evidence of tribochemical reaction. On the other hand, thick tribolayers were formed on the worn surface of both oil-enriched a nd as-prepared AAO at relatively high load (1 N) due to tribochemical reaction and material transfer.