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- 저자 : 한기천(Han Ki Cheon) (검색결과 5 건)
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100 gm 경구 당부하검사 결과 하나만 비정상을 보인 임신의 양상
한기수(Ki Su Han),양성천(Seong Cheon Yang),김행수(Haeng Soo Kim),양정인(Jeong In Yang),이희종(Hee Jong Lee),임재현(Jae Hyun Lim),임윤경(Yun Kyoung Lim),오기석(Kie Suk Oh) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.10
N/A Objective : To evaluate the clinical outcomes of pregnancies showing one abnormal glucose tolerance test value. Method : We performed 50 gm glucose challenge test in 5,019 pregnant women at 24-28 weeks of gestation. In 1,170 women with plasma glucose levels over 130 mg/dL, 100 gm oral glucose tolerance tests (OGTTs) were performed at 28-32 weeks of gestation. In the 888 cases who were followed up, according to the National Diabetes Data Group (NDDG) criteria, 122 cases with one abnormal 100 gm OGTT value were divided into three groups (groups 1, 2, 3 : abnormal value after 1, 2, 3 hours, respectively). These were compared with 577 cases (control group) with normal 100 gm OGTT value, retrospectively. Result : The incidence of one abnormal glucose tolerance test value was 2.6%, and there were no cases where the fasting plasma glucose level only was elevated. The incidence (control, group 1, group 2, group 3 : 19.4%, 43.8%, 25.7%, 29.6%) of poor maternal outcomes which contain any one of preeclampsia, hydramnios, cesarean delivery for cephalopelvic disproportion or failure to progress or fetal distress was highest in group 1 (p=0.025). The incidence (15.8%, 43.1%, 14.3%, 21.1%) of poor perinatal outcomes which contain any one of fetal distress, Apgar score of 5 minute < 7, hypoglycemia, respiratory distress syndrome, small for gestational age, perinatal death was also highest in group 1 (p=0.009). Logistic regression analysis for poor maternal outcomes showed odds ratio of 2.83 (95% confidence interval 1.02-7.87) in group 1 and 2.08 (95% confidence interval 1.22-3.55) in group 3, and for poor perinatal outcomes odds ratio of 4.24 (95% confidence interval 1.02-17.52) in group 1 and 3.30 (95% confidence interval 1.45- 7.48) in group 3. Conclusion : Pregnancies complicated with one abnormal glucose tolerance test value, particularly the group showing abnormal glucose tolerance test value after 1 or 3 hour exhibited adverse maternal and perinatal outcomes.
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배명진,한기천,차진종,Bae, Myung-Jin,Han, Ki-Cheon,Cha, Jin-Jong 한국음향학회 1997 韓國音響學會誌 Vol.16 No.2
음성신호처리 분야에서 정확한 피치검출은 중요하고 필요하다. 지금까지 제안된 피치검출 알고리즘들은 음성신호의 다양성으로 인해 피치를 정확히 검출하기가 어렵다. 본 논문에서는 PCM과 같은 균일 양자화기의 잔여신호에 대해 음성신호의 기본주기를 검출하는 새로운 피치검출법을 제안하였다. 제안한 방법은 무잡음 음성에 대해 평균 0.25%의 조오율이 그리고 0dB의 SNR에 대해서는 평균 3.39%의 조오율이 나타나는 정확성을 보였다. 또한 음소의 천이영역이나 배경잡음 하에서도 피치검출의 정확도가 개선된 피치검출의 결과를 얻었다. In speech signal processing, it is necessary and important to detect exactly the pitch. The algorithms of pitch extraction which have been proposed until now are difficult exactly pitches over wide range speech signals. In this paper, thus, we proposed a new pitch detection algorithm that finds the fundamental period of speech signal in the residual signal quantized by the uniform quantizer as PCM. The proposed method shows little gross error of average 0.25% for clean speech and average 3.39% for SNR of 0dB. It also achieves results of the pitch contours, improving the accuracy of pitch detection in transient phonemes and noise environments.
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정낙주,박병돈,박한수,서종균,한기천,정회경,Jeong, Nahk-Ju,Park, Byung-Don,Park, Han-Su,Seo, Jong-Kyoun,Han, Ki-Cheon,Jung, Hoe-Kyung 한국정보통신학회 2016 한국정보통신학회논문지 Vol.20 No.5
MACsec 은 Layer 2에서 동작하는 암호화 기능으로, IEEE 802.1AE에서 정의하고 있는 국제 표준이다. 최근 주목을 받고 있는 IoT(사물인터넷) 와 같은 산업 분야의 장치들이 네트워크에 연결되면서 인터넷 트래픽이 급격히 증가하고 있으며, 다양한 인터넷 공격의 위기에 노출되고 있다. 기존의 네트워크 보안 기술들은 IPsec과 같이 Layer 3에서 이루어지는 경우가 많았다. 그러나 현재와 같이 트래픽이 급격히 증가하고 복잡해지는 상황에서는 특정 응용이나 프로토콜에 대한 보안 대신에 트래픽 전체를 보호하는 기능에 관심을 갖게 된다. 이러한 기술로 등장한 것이 Layer 2에서 트래픽 전체를 보호하는 기술인 MACsec 기술이다. 본 논문에서는 Layer 2 보안 기술인 MACsec을 기존 Layer 2 네트워크에 간편하고 쉽게 추가할 수 있는 기술로서 MACsec 어댑터를 제안한다. 그리고 MACsec의 특징 및 장점을 기술하고 실제 제품을 구현하여 시험을 진행한다. MACsec is a cryptographic function that operates on Layer 2, the international standard defined in the IEEE 802.1AE. As industries such as IoT(Internet of Things) devices are receiving attention recently are connected to the network and Internet traffic is increasing rapidly, and is exposed to the risk of a variety of Internet attacks. Traditional network security technologies were often made in Layer 3, such as IPsec. However, to be increased as rapidly as the current traffic situation is complicated, and became interested in the security function of protecting the entire traffic instead of for a specific application or protocol. It appeared as these technologies is technology MACsec technology to protect all traffic in Layer 2. In this paper, we propose a Layer 2 security technology adapter MACsec MACsec a technology that allows you to simply and easily add them to the existing Layer 2 networks.
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GNU 컴파일러를 이용한 ES-C2340 DSP2용 C 교차 컴파일러의 개발
김승호(Kim Sung Ho),이시영(Lee Si Young),권육춘(Kwon Yoock Choon),유하영(Yoo Hah Young),한기천(Han Ki Cheon) 한국정보처리학회 1997 정보처리학회논문지 Vol.4 No.1
In this paper, we describe the implementation of the C cross-compiler for the ES-C2340 DSP2 processor by using the GNU compiler. For the rapid and efficient developing of the compiler, we use the approach that combines some parts of the language-dependent front-end of the GNU compiler and other parts like the processor-dependent back-end which is implemented newly to build the compiler. This approach has several advantages. First, as we use GNU compiler''s well-proved excellent optimization method and multi-language support capability, we can improve the efficiency and generality of the compiler. Second, as we concentrate on the developing of processor-dependent part, it shorten the compiler developing time, third, with that, we can use high-level language as logic approving tool in processor developing process. And to support the cross-compiler, we also implement a text-level pre-linker.
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