자사주매입 공시 후 주가수익률의 추세분석

이태희,김철규,임병문,Lee, Tae-Hee,Kim, Chul-Kyue,Lim, Byung-Moon 한국재무관리학회 2001 재무관리연구 Vol.18 No.2

자사주 매입에 대한 선행연구는 대부분 그 분석기간이 10일 또는 20일에서 길어도 3개월을 초과하지 않는다. 그러나 투자자들의 공시에 대한 믿음의 수정은 이익발표 등과 같은 추가적인 정보가 나올 때에 이루어질 가능성이 더 크며 이러한 정보들이 자사주매입 공시 후 20여일 후에 나올 가능성은 더 크다고 할 수 있다. 외국의 선행연구에서도 공시후 주가추이분석은 $1{\sim}5$년을 측정기간으로 하고 있으며 동 기간동안에 추가적인 주가상승이 있음을 보고하고 있다. 본 연구에서는 기존의 연구와 달리 표본기간과 표본수를 확대하고 주가반응을 살피는 기간을 연장하여 자사주매입 공시의 정보효과에 대해 검증하였다. 검증 결과 기존의 연구나 실무계에서 주장하는 공시 후 20여일 동안의 주가상승은 자사주매입의 정보신호효과로 인한 것이라는 증거를 찾을 수 없으며, 주가의 상승 자체도 일반적인 현상이 아니라 특정한 연도(주가하락이 극심했던 1997년도)에 국한된 현상임을 확인하였다. 그러나 특정연도에 추가적인 주가상승이 발생한 이유에 대해서는 명확한 결론을 내 릴 수 없었다. 또한 자사주매입으로 인한 주가의 추가 상승은 단기적인 현상이 아니라 매우 장기적인 현상일 것이라는 점에 착안하여 분석기간을 공시 후 80여일로 늘려서 분석을 실시한 결과 정보신호효과와 관련된 변수가 유의적인 값을 가지기 시작하였다.

강녕탕(康寧湯)의 LPS 질내 주입 생쥐에 미치는 항염증(抗炎症) 효과

이태희,윤정문,임은미,김윤상,조현주,Lee Tae-Hee,Yoon Jung-Moon,Lim Eun-Mee,Kim Yoon-Sang,Cho Hyun-Ju 대한한의학방제학회 2004 대한한의학 방제학회지 Vol.12 No.2

Objective: We made the genital organs inflammatory mice model by vaginal injection of Lipopolysaccharide(LPS), and we intended to make study about anti-inflammatory effects of Gangyeong-Tang, among oral and rectal medication and Herbal-Acupuncture treatment. Method: The female ICR(20-30g) mice were used, the temperature was controlled within $22{\pm}0.5^{\circ}C$ and water and food was not limited. The environment was manipulated to simulate 12 hours of day and 12 hours of night. After LPS injection into vagina, we confirmed on-set of inflammation. 2 days before LPS injection, we started to medicate Gangyeong-Tang in Oral and Rectal and Aqua-acupucture treatment. After 3days from LPS injection, we mesured the White Blood Cell(WBC), Interrleukin-6(IL-6), Tumor Necrosis Factor-${\alpha}$(TNF-${\alpha}$) in blood which was collected from the Retro-orbital Plexus. Results: 1. We made the genital organs inflammatory mice model by vaginal injection of LPS successfully. 2. The number of WBC was decreased significantly as we medicated Gangyeong- Tang in Oral 1g/kg dose, 3g/kg dose and Rectal 1g/kg dose, rectal 3g/kg dose. 3. The concentration of IL-6 was decreased significantly as we medicated Gangyeong-Tang in all group of the Oral, Rectal, Herbal-Acupuncture treatment. 4. The concentration of TNF-${\alpha}$ was decreased significantly as we medicated Gangyeong-Tang in Oral 3g/kg dose and Rectal 1g/kg dose, Rectal 3g/kg dose group. Herbal-Acupuncture treatment group datas showed reductive tendency. Conclusion: As a result of this experiment, we made the genital organs inflammatory mice model by vaginal injection of LPS successfully and demonstrated anti-inflammatory effect of Gangyeong-Tang.

착상시 핀-관 열교환기의 열적 성능 예측을 위한 해석

이태희,이관수,김우승,Lee, T.H.,Lee, K.S.,Kim, W.S. 대한설비공학회 1996 설비공학 논문집 Vol.8 No.2

This work presents an analytical model, so called modified LMTD method, to predict the thermal performance of finned-tube heat exchanger under frosting conditions. In this model, the total heat transfer coefficient and effective thermal conductivity of the frost layer were defined as a function of frost surface temperature. The surface temperature of the frost layer formed on the heat exchanger was calculated through the analysis of the heat and mass transfer process in the air and frost layer. To examine the validity of this analytical model, the computed results from the present model, such as heat transfer rate, frost mass and thickness of frost, were compared with the ones of the expermental work and LMED method.

좀나무싸리버섯(Clavicorona pyxidata)의 균사체 최적 배양조건 및 세포효소활성 특성

이태희,김진만,한영환,Lee Tae-Hee,Kim Jin-Man,Han Yeong-Hwan 한국미생물학회 2006 미생물학회지 Vol.42 No.2

The culture conditions for the enhanced mycelial of Clavicorona pyxidata DGUM 29005 were investigated. The optimal temperature and pH for the mycelial growth were $24^{\circ}C$ and 5.0, respectively. It was shown that trehalose was the best supplement of carbon sources in Czapek-Dox medium as a minimal medium for enhanced mycelial growth. In general, inorganic nitrogen sources were better than organic ones for mycelial growth. Calcium nitrate was the best out of the inorganic nitrogen test. The appropriate phosphorous and vitamin were $Na_2HPO_4$ and p-aminobenzoic acid, respectively. After the mycelial of C. pyxidata DGUM 29005 was cultivated at $24^{\circ}C$ for 20 days in MEM broth(pH 5.0), the specific activities of both exomycelial and endomycelial enzymes were determined. Among the exomycelial enzyme assayed, the specific activity of laccase was much higher than those of other enzymes. However, little or no enzyme activities of ${\alpha}$-amylase, chitinase, lipase and pretense were found.

농포건선 환자에서 발생한 주변부궤양각막염 및 공막염 1예

이태희,지영석,김성진,윤경철.Tae Hee Lee. MD. Yong Sok Ji. MD. Seong Jin Kim. MD. PhD. Kyung Chul Yoon. MD. PhD 대한안과학회 2014 대한안과학회지 Vol.55 No.6

Purpose: To report a case of peripheral ulcerative keratitis and scleritis in a patient with pustular psoriasis. Case summary: A 62-year-old male presented with skin lesions on the hands and feet and pain in the right eye, which started a few days prior. Corrected visual acuity was 0.5 in the right eye and 0.7 in the left eye at initial visit. Corneal edema, erosion, ulcer and peripheral corneal infiltration of the right eye were observed. However, anterior chamber reaction was not observed. Histological analysis of hand skin lesions indicated pustular psoriasis. The patient was initially treated with topical antibiotics and a combined therapy of oral and topical steroids for ocular symptoms. As a result, the right eye showed slight improvement and the oral steroid was discontinued. One month after the initial visit, scleritis appeared on the left eye and topical and oral steroids were restarted for both eyes. Two months after the initial visit, ocular symptoms were improved significantly and corrected visual acuity was 1.0 in both eyes. The mild peripheral corneal opacity remained in the right eye, but the previous inflammations in both eyes were improved. Conclusions: As shown in this case, possibility of peripheral corneal infiltration, corneal ulcer and scleritis should be considered in patients with pustular psoriasis and topical and systemic steroids should be administered if accompanying ocular manifestations occur. J Korean Ophthalmol Soc 2014;55(6):913-917

스마트 지능형 자가보고 코팅 기술 동향 및 응용

이태희,김진철,이상호,박영일,노승만,Lee, Tae Hee,Kim, Jin Chul,Lee, Sang-Ho,Park, Young Il,Noh, Seung Man 한국접착및계면학회 2019 접착 및 계면 Vol.20 No.2

전경 객체의 3차원 복원 정밀도 향상 기법 분석

박지찬(Jichan Park),반유석(Yuseok Ban) 한국정보통신학회 2023 한국정보통신학회논문지 Vol.27 No.4

딥러닝 기술의 발전으로 2차원 영상으로부터 3차원 정보를 정밀하게 생성함으로써 높은 품질의 3차원 복원을 수행하는 기술이 발전하고 있다. 3차원 복원 기술이 일반적으로 갖는 느린 학습 속도의 단점을 개선하기 위해 다양한 연구가 진행되고 있다. 또한, 전경의 3차원 복원 정밀도를 향상시키기 위한 연구가 다양하게 시도되고 있다. 본 논문에서는 배경 영역을 제거하여 전경 영역만을 분리했을 때의 3차원 복원을 세분하여 정량적 및 정성적으로 비교·분석하였다. 실험 결과를 토대로 충분한 외관 특징이 확보 가능한 전경에 대해서 전경을 분리하여 학습하는 것과 학습 영상이 부족한 환경에 대해서 전경 영역을 선택적으로 학습하는 것이 효과적임을 확인했다. Due to the rapid advancement of deep learning techniques, high-quality 3D reconstruction methods that generate precise 3D information from 2D images have been proposed. However, the long duration for model learning has been a major drawback of 3D reconstruction techniques, and many studies have been conducted to address this issue. In addition, there are many ongoing studies to enhance the precision of the 3D reconstruction for a foreground object. This paper conducts quantitative and qualitative comparisons and analyzes the 3D restoration of an object while matting the foreground areas but excluding the background areas from participating in the learning process. Based on experimental results, it has been noted that it is effective to separate foreground objects with sufficient visual features from background areas and to selectively train the foreground information in the condition of insufficient training data.

프리캐스트 PSC 곡선거더교의 장기계측

이태희(Lee, Tae Hee),이후범(Lee, Hoo Bum),김태균(Kim, Tae Kyun),김장호(Kim, Jang-Ho Jay) 한국콘크리트학회 2018 한국콘크리트학회 학술대회 논문집 Vol.30 No.2

자동차 튜닝 대중화를 위한 교육프로그램 개발

이태희(Tae hee Lee),하성용(Sung-ryong Ha),김홍익(Hongeik Kim),김무준(Mu Jun Kim) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5

연령에 따른 간농양의 임상적 고찰

이태희 ( Tae Hee Lee ),김용석 ( Yong Seok Kim ),강영우 ( Young Woo Kang ),김성태 ( Sung Tae Kim ),임의혁 ( Euyi Hyeog Im ),허규찬 ( Kyu Chan Huh ),최용우 ( Young Woo Choi ),김선문 ( Sun Moon Kim ),박주호 ( Joo Ho Park ),정장한 ( J 대한소화기학회 2010 대한소화기학회지 Vol.56 No.2

Background/Aims: Pyogenic liver abscess remains a major diagnostic and therapeutic challenge, despite advances in diagnostic technology and new strategies for treatment. This study was conducted to compare the differences in clinical features and outcomes of pyogenic liver abscess according to age. Methods: In total, 166 patients were enrolled and included 63 (<65 years old, group 1), 62 (65-74 years old, group 2), 41 (>75 years old, group 3) patients in each group. We reviewed the medical records retrospectively including etiology, underlying diseases, characteristics of the liver abscess, laboratory and microbiologic findings, treatment, and outcome of the patients. Results: Group 1 had higher prevalence rates of male patients and chronic alcoholics, but lower prevalence rates of biliary disease, hypertension, and malignancy. In laboratory findings, group 2 had higher incidence of thrombocytopenia, elevated blood urea nitrogen and creatinine. There were no differences in symptoms and microbiologic findings in blood and pus among the three groups. Liver abscesses were more common in right liver in Group 1. The lengths of stay and the treatment modalities were similar in three groups. Conclusions: Although there were differences in sex ratio, etiology, underlying disease among the different age groups, they did not cause difference in treatment and clinical outcome of pyogenic liver abscess. Thus, we recommend active treatments in patients of all age. (Korean J Gastroenterol 2010;56:90-96)