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홍대기 ( Dae Gy Hong ),( Eun Hee Kim ),( Joo Young Kim ),( Yoon Hee Lee ),( Gun Oh Chong ),( Ji Young Park ) 대한산부인과학회 2015 대한산부인과학회 학술대회 Vol.101 No.-
Objective: This study was aimed to compare immunohistochemical expression of estrogen receptor (ER)a, progesterone receptOf (PR), and calponin in gonadotrophin-releasing horrrone agonist (GnRH-a)-sensilive and -resistant uterine fibroids. Methods: We collected data retrospectively. The sensitive group consisted of women who had reduction in uterine volume greater than 40% following GnRH-a treatment. Uterine volume was either reduced by less than 10%, or was increased in the resistant group. A tissue microarray was constructed using formalin-fixed, paraffin-embedded tissues, 31 and 26 patients for the sensitive and resistant groups, respectively. Tissue sections were immunostained with antibodies against ER-a, PR. and calponin. The intensity and area of the immunohistochemical reactions were evaluated using a semi-quantitative scoring system. The Mann-WhitneyU-test, Fisher``s exact test. and Spearman``s rank correlation test were used for analysis of data. Results: PR (P= 0.04) and calponin (p= 0.03) showed a significantly higher staining intensity in the resistant group than in the sensitive group. Both groups showed comparable expression of ER-a (P = 0.23). In correlation analysis between changes in uterine volume after GnRH-a therapy and clinicopathological factors, the immunohistochemical intensity 01 PR (P= 0.04) 2nd calponin (P= 0.03) was significantly correlated with changes in uterine volume. Conclusion: This study shows that GnRH-a resistance of uterine fibroids is not related to ER-a content. but the expression of PR and calponin is related with GnRH-a resistance.
CAT.M1 통신을 이용한 자율주행로봇 연동 스마트승강기 구현
홍대오(Dae-Oh Hong),백제현(Je-Hyeon Baek),박건웅(Gun-Woong Park),임광호(Gwang-Ho Lim),문석호(Seok-Ho Moon),이상민(Sang-Min LEE) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.12
현대의 승강기 산업은 사물인터넷(IoT) 기반으로 고도화에 중점을 두고 있지만 공개되지 않는 폐쇄적인 방향으로 발전되었다. 최근에는 운영체제나 시스템, 애플리케이션, 라이브러리 등을 활용한 인터페이스인 오픈 API를 출시하여 다각적인 협업을 추구하고 기존의 방법들 보다 다양한 기능들을 확대해 나아가고 있다. 본 논문에서는 LoRa, NB-IoT와 같이 IoT를 위한 저용량 데이터 통신 기술인 CAT.M1을 활용한 정보통신기술을 바탕으로 하여 차세대 스마트 승강기와 실내 자율주행로봇간의 서비스를 구현하고자 한다. The modern elevator industry has developed in a closed direction that focuses on upgrading based on the Internet of Things (IoT), but is not open to the public. Recently, open API, an interface using an operating system, system, application, library, etc., is being released to pursue diverse collaboration and expand various functions than existing methods. This paper aims to provide services between next-generation smart elevators and indoor autonomous driving robots based on information and communication technology using CATM1, a low-capacity data communication technology for IoT such as LoRa and NB-IoT.
홍대영,백광제,이경룡,권운용,박준석,어은경,오범진,이미진,이성우,서주현,노형근,김준식,Hong, Dae-Young,Baek, Kwang-Je,Lee, Kyeong-Ryong,Kwon, Woon-Yong,Park, Joon-Seok,Eo, Eun-Kyung,Oh, Bum-Jin,Lee, Mi-Jin,Lee, Sung-Woo,Suh, Joo-Hyun,Roh, 대한임상독성학회 2007 대한임상독성학회지 Vol.5 No.1
Purpose: Owing to organophosphate-pyrethroid mixtures are widely used, suicidal or unintentional poisoning is common. But there have been relatively few reports of poisoning. The purpose of this study is to evaluate the difference of the severity and toxicity between organophosphate-pyrethroid mixtures poisoning and single organophosphate poisoning. Methods: From August 2005 to July 2006, 65 patients presented with organophosphate-pyrethroid mixtures poisoning to emergency medical center. Date were gathered by report form it was drawn up. Results: 65 patients were enrolled in 28 hospitals and their mean age was $56.5{\pm}16.2$ years old. The most common cause of poisoning was suicide, in 52 cases(80%). Chlorpyrifos-cypermethrin, malathion-esfenvalerate were the most frequent chemicals involved, and the mean ingestion amount was 135.4ml. The most common symptom of the patients was nausea/vomiting, in 16 patients. The average GCS score was 13. The mean ICU stay was $4.4{\pm}5.2$ days, and mortality was 3.1%. Conclusion: The severity and toxicity of organophosphate-pyrethroid mixture poisoning were lower than that of single organophosphate poisoning.
김선희,오재일,홍대기,Kim, Sunhee,Oh, Jaeil,Hong, Dae-ki 한국반도체디스플레이기술학회 2021 반도체디스플레이기술학회지 Vol.20 No.3
Digital decimation filters are used in various digital signal processing systems using ADCs, including digital communication systems and sensor network systems. When the sampling rate of digital data is reduced, aliasing occurs. So, an anti-aliasing filter is necessary to suppress aliasing before down-sampling the data. Since the anti-aliasing filter has to have a sharp transition band between the passband and the stopband, the order of the filter is very high. However, as the order of the filter increases, the complexity and area of the filter increase, and more power is consumed. Therefore, in this paper, we propose two types of decimation filters, focusing on reducing the area of the hardware. In both cases, the complexity of the circuit is reduced by applying the required down-sampling rate in two times instead of at once. In addition, CIC decimation filters without a multiplier are used as the decimation filter of the first stage. The second stage is implemented using a CIC filter and a down sampler with an anti-aliasing filter, respectively. It is designed with Verilog-HDL and its function and implementation are validated using ModelSim and Quartus, respectively.
자궁내막 샘근육종 폴립을 동반한 Peutz-Jeghers 증후군
이윤희 ( Yoon Hee Lee ),홍대기 ( Dae Gy Hong ),배지혜 ( Ji Hae Bae ),박내윤 ( Nae Yoon Park ),정근오 ( Gun Oh Chong ),이윤순 ( Yoon Soon Lee ) 대한산부인과학회 2011 Obstetrics & Gynecology Science Vol.54 No.2
Peutz-Jeghers syndrome, which has autosomal dominant inheritance, shows pigmentation in lip and skin. It also has features of harmatomatous polyp over the gastrointestinal tract, while sometimes developing tumor in genital tract. Known tumors in female genital tract include cervical adenocarcinoma, sex cord tumor, etc. Adenomyomatous polyp in uterus is also one of the rare diseases, which seldom develop in the absence of hormone treatment such as Tamoxifen. Currently, there is one case of Peutz-Jeghers syndrome patient with endometrial adenomyomatous polyp. Authors found mole-like lesions on the transvaginal ultrasonogram in a typical Peutz-Jeghers syndrome patient without pregnancy history and previous chemotherapy. After confirming its diagnosis of adenomyomatous polyp on resectoscopic biopsy, we report our findings along with brief literature review.
최대 도플러 주파수 추정 시 대역 조절을 통한 부가 잡음의 영향 완화 기법
유현규,박구현,오성목,강창언,홍대식,Yu Hyun-kyu,Park Goo-hyun,Oh Seong-Mok,Kang Chang-eon,Hong Dae-sik 한국통신학회 2005 韓國通信學會論文誌 Vol.30 No.6C
이동 통신 시스템에서 최대 도플러 주파수 정보는 여러 가지 채널 적응 기술들과 무선 자원 관리 방법들의 무선 채널에 대한 최적화를 가능하게 한다. 본 논문에서는 레벨 교차율(LCR: level crossing rate) 및 공분산 함수(COV: covariance)에 기반을 둔 두 가지 최대 도플러 주파수 추정 기법을 제안한다. 부가 잡음의 영향을 제거하기 위해 신호 대 잡음비(SNR)에 독립적인 성능을 위한 조건을 분석하고, 제시한 조건을 만족시키기 위하여 하향 표본화 (downsampling) 방법을 이용한 도플러 주파수 추정 알고리즘을 새로이 제안하다. 모의실험을 통해, 제안된 기법이 SNR 변화에 상관없이 좋은 성능을 나타냄을 확인할 수 있다. Information of the maximum Doppler frequency enable to optimize many channel-adaptive techniques and radio resource management methods for mobile radio communication systems. In this paper, we propose two maximum Doppler frequency estimators which are based on the level crossing rate(LCR) and the covariance function (COV). To eliminate the effect of additive noise, we analyze the conditions for the estimators independent of the signal-to-noise ratio(SNR) and implement the conditions with a simple downsampling process. The proposed methods achieve good SNR-independent performance.