Growth of the Urechis unicinctus in semi-enclosed seawater pond

Jong-Ak Lim,Chun-Cheol Kim,Hye-Ran Hong,Hye-Ri Nam,Jun-Yeong Oh,Yong-bin Park,Dae-cheol Seo,Jun-Taek Park 한국수산과학회 양식분과 2022 한국수산과학회 양식분과 학술대회 Vol.2022 No.10

The influence of hormone administration on quantity of egg collection in Misgurnus anguillicaudatus

Jong-Ak Lim,Chun-Cheol Kim,Young-Hun Kim,Kyoung-Woo Lee,Joon-Teak Park 한국수산해양기술학회(구 한국어업기술학회) 2015 한국수산해양기술학회 학술발표대회 Vol.2015 No.10

The influence of hormone administration on quantity of egg collection in Misgurnus anguillicaudatus

Jong-Ak Lim,Chun-Cheol Kim,Young-Hun Kim,Kyoung-Woo Lee,Joon-Teak Park 한국수산과학회 양식분과 2015 한국수산과학회 양식분과 학술대회 Vol.2015 No.10

IMPATT 다이오드의 백여혼합에 관한 연구

박규태,이종악,이태호,Park, Gyu-Tae,Lee, Jong-Ak,Lee, Tae-Ho 대한전자공학회 1974 전자공학회지 Vol.11 No.2

Theoretical analysis is carried out for the beat frequency generation phenomena in the IMPATT diodes an4 the experimental studies are given in parrallel. The theory is based on the space charge modulation effect introduced to the multiplication process by the input signal. Computed results show that the beat frequency output power is linearly dependent upon the signal power and self oscillating power. Also the strong dependence of the output power with respect to the diode negative resistance is found and it turns out that the larger the negative resistance, the stronger the beat frequency output power. Experimental results show a good agreement with the theoretical values. Calculated conversion gain is about -0.4[db] at 10[GHz] and the experimental value shows -6.2[db] below this value. This difference between the theoretical and the experimental values is considered to be the results of the ineffective injection of signal power. IMPATT다이오드의 자기혼합효과(self mixing effect)를 이론으로 해석하고 실험으로 확인하였다. 이론은 증배과정에서 외부의 마이크로도 신호에 의하여 공간전하가 변조를 받는 것에 근거하였다. 비이트출력은 신호전력과 IMPATT다이오드발진전력에 직선적으로 비례하였고 IMPATT다이오드의 부성저항이 클수록 비이트출력이 증대하였다. 실험은 GaAs의 EPi층과 금속사이의 Schottky접합을 갖는 IMPATT다이고드를 사용하였다. 전자계산기의 계산결과 10(GHz)에서 변환이득은 -0.4[db]였으며 실험치는 비이트주파수 20(MHz)에서 -6.6[db]였다. 이 차이는 Read모델의 단순한 가정과 공진기의 구조에 의한 것이었다. 1개의 다이오드가 국부발진 및 R합작용을 동시에 수행할 수 있었으며, 또 변환이득은 일반다이오드보다 높았고 IMPATT다이오드의 발진출력에 따란 증대시킬 수 있었다.

YIG를 사용한 자계동조 방향성결합 협대혁 통과 및 차단 여파기

박규태,이종악,황금찬,Park, Gyu-Tae,Lee, Jong-Ak,Hwang, Geum-Chan 대한전자공학회 1971 전자공학회지 Vol.8 No.4

직류자계로 가변동조되는 YIG여파기의 설계및 측정을 논하였다. 직각으로 굽힌 박판전송선과 2개의 YIG구를 RF 원형회전자계로 분리되는 곳에 위치시켜 차단및 투과특성을 얻었다. 차단특성은 -25db 였으며 통과특성은 이보다 약간 낮은 22db였다. FMR에 관한 이론치와 실측치는 잘 일치하였으며 방향성결합기로 사용될 수 있음을 보였다. Fabrication and measurements of the magnetically tunable YIG band pass or stop filter at X-band are discussed. Using two YIG spheres located at the region of r-f circularly polarized magnetic field between the strip lines, the pass or stop characteristics of the filter are obtained. In the case of band stop, the output level is typically 25db lower than the input power. Contrarily for the pass band, the pass band level is 22db higher than the stop frequency region. The experimental results are in good agreement with the theoretical values of FMR. Further it is shown that the structure can be used for a directional coupler.

자연급기구내 플리머필터 설치 시 외기 침기량 분석에 관한 연구

이성환(Seong Hwan Yi),최종악(Jong Ak Choi) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-

This test was progressed in the test house of KICT as sectional research of Center for Sustainable Housing. It included a ventilation rate of hybrid ventilation equipment, temperature, and gas test using the SF-6. The purpose of this test is to demonstrate the performance of viovent by estimating an outdoor air flow rate through viovent which the flimmer filter is installed and decide the leakage after operating the constant airflow fan within a house. First, the outdoor airflow rate through viovent measured 130 ㎥/h more than a legal required ventilation rate, 104 ㎥/h. And then it sufficiently satisfy a legal standard, 0.7 air change/h. Secondly, the result of this test exposes that the leakage in the residence is about 20~25%. Especially, the outdoor air flowing through the gate occupies 50% of the total leakage.

섬유근육통 환자에서의 건성안

장혜정 ( Hye Jung Jang ),안정명 ( Jung Myung An ),박종률 ( Jong Ryul Park ),이진호 ( Jin Ho Lee ),김산 ( San Kim ),악설정 ( Seol Jung Ak ),이지현 ( Ji Hyun Lee ) 대한내과학회 2007 대한내과학회지 Vol.73 No.5

목적: 건성안은 눈물의 부족 및 눈물막의 과도한 증발로 눈의 불쾌감 및 자극증상을 일으키는 눈물막의 질환이다. 건성안이 섬유근육통 환자에서 흔한 것으로 알려져 있으며, 각막 궤양과 섬유화와 같은 심각한 합병증을 유발할 수 있으므로 적절한 진단과 치료가 필요하다. 이에 저자들은 섬유근육통 환자들을 대상으로 병리 기전에 따른 건성안의 유병률을 조사하고, 환자군에서 건성안의 정도와 섬유근육통 증상과의 관련성을 알아보고자 하였다. 방법: 2006년 3월부터 2006년 12월까지 본원 류마티스 내과를 방문한 환자 중에서 1990년 개정된 미국류마티스학회(ACR)의 진단기준에 의해 섬유근육통으로 진단받은 50명의 환자군을 선정하여 Korean Fibromyalgia Impact Questionnaire (KFIQ), Ocular Surface Disease Index (OSDI), Schirmer test와 Tear Break Up Test (TBUT)를 시행하였다. KFIQ와 OSDI로 섬유근육통 증상과 건성안 증상 정도를 각각 평가하였다. Schirmer test와 TBUT로 눈물의 부족과 눈물막의 과도한 증발에 의한 건성안의 유병률을 각각 조사하였다. 그리고 OSDI, Shirmer test, TBUT, 나이, 유병기간이 KFIQ와 관련이 있는지 조사하였다. 결과: 섬유근육통 환자에서 건성안의 유병률은 Schirmer test로는 12.0%, TBUT로는 92.0%였다. OSDI는 KFIQ와 양의 상관관계를 나타내었다(p=0.006). Schirmer test는 KFIQ와 유의한 상관관계를 나타냈으나(p=0.024), TBUT는 KFIQ와 통계학적 연관성이 없었다(p=0.493). 결론: 이 연구에서 건성안은 섬유근육통 환자에서 흔하게 나타났으며, 눈물의 부족보다는 눈물막의 과도한 증발에 의한 것이 더 많았다. 그리고 건성안 증상이 심할수록 섬유근육통 증상이 심한 것으로 나타났다. Background: Dry eye is a disorder of the tear film caused by reduced tear production or excessive tear evaporation. A high incidence of sicca symptoms has been noted in fibromyalgia (FM) patients resulting in serious complications. This study was conducted to evaluate the incidence of dry eye by pathogenic mechanisms and to investigate the relationship between dry eye and symptom severity in FM patients. Methods: Fifty patients that visited Maryknoll Hospital between March 2006 and December 2006 were included in the study. Enrolled patients underwent a Korean fibromyalgia impact questionnaire (KFIQ), ocular surface disease index (OSDI), Schirmer test and tear break up test (TBUT). The KFIQ and OSDI are used to assess the severity of fibromyalgia symptoms and dry eye symptoms, respectively. The Schirmer test and TBUT are used to assess reduced tear production and excessive tear evaporation, respectively. We assessed the OSDI, Schirmer test, TBUT, age and disease duration in terms of the KFIQ. Results: The incidence of dry eye was high in FM patients (12.0% by the Schirmer test and 92.0% by the TBUT test). The OSDI positively correlated with the KFIQ (p=0.006). A positive correlation was observed between the Schirmer test and the KFIQ (p=0.024), but not between the TBUT and the KFIQ. Conclusions: In this study, dry eye was found to be common in FM patients. Excessive tear evaporation was a more common cause of dry eye than reduced tear production. The patients with more severe dry eye symptoms tend to have more severe FM symptoms.(Korean J Med 73:519-524, 2007)

한국어 단독음 인식을 위한 표준패턴 설정에 관한 연구

김계국,고덕영,이종악,Kim, Gye-Guk,Go, Deok-Yeong,Lee, Jong-Ak 한국음향학회 1987 韓國音響學會誌 Vol.6 No.1

본 연구에서는 집단화 알고리즘을 이용하여 한국어 단독음의 표준 패턴을 설정하였다. Minimax기법을 이용하여 각 단독음에 대하여 최고 3개까지 표준패턴을 설정하여 인식하였다. 특징 파라미터는 선형예측계수와 자기 상관 계수를 이용하였으며 패턴들 간의 유사도 비교는 Itakura가 제안한 거리측정법을 이용하였다. 표준패턴을 1개만 설정하였을 때 $55.9\%$, 2개를 설정했을 때 $76.9\%$, 3개를 설정했을 경우는 $89.5\%$의 인식률을 얻었다. This paper discusses a reference pattern creation for a speaker-independent Korean isolated word by using the clustering. Tn this paper we permitted to top 3 clusters and created reference pattern by Minimax Criterion. The features parameter used the LPC Coefficients and Autocorrelation and simple Itakura distance measure was used to measure similarity between patterns. With word reference patterns obtained as described above the recognition rate was within one choice only $55.9\%$, two choice only $76.9\%$, three choice only $89.5\%$.

한국치위생학회지 게재논문(창간호~2015년)의 연구동향 분석

장종화,원복연,장계원,김설악,오상환,김윤정,하명옥,이영은,이가령,박성숙,엄숙,Jang, Jong-Hwa,Won, Bok-Yeon,Jang, Gye-Won,Kim, Seol-Ak,Oh, Sang-Hwan,Kim, Yun-Jeong,Ha, Myung-Ok,Lee, Young-Eun,Lee, Ga-Ryoung,Park, Sung-Suk,Um, Suk 한국치위생학회 2017 한국치위생학회지 Vol.17 No.4

Objectives: The purpose of study is to investigate trends in dental hygiene research published in the Journal of Korean Society Dental Hygiene. Methods:Total of 992 researches were published between 2001 to 2015 were reviewed using analysis criteria. Results: 23.7% of the researches were supported financially. The most frequent research topics were oral health (40.9%). 3 to 5 researchers per research (38.5%) was most common and 84.1% of principal researchers were professors. 29 researchers were approved by IRB (2011 to 2015). As for the type of research, 87.1% of quantitative studies adapted survey and 9.5% adapted experiment. Convenient sampling was used in 85.6% of the researches. 32.7% of studies searched information in school. Interventions of dental material were the most in pre experimental design (19.2%) and Interventions of activation of oral health program were the most in quasi experimental design (37.5%). Conclusions: The findings of this study suggested the recent trends and the direction in dental hygiene research.

한국 치위생(학)과 표준교육과정안 개발

원복연 ( Bok Yeon Won ),장계원 ( Gye Won Jang ),황미영 ( Mi Yeong Hwang ),김설악 ( Seol Ak Kim ),장종화 ( Jong Hwa Jang ) 한국치위생학회(구 한국치위생교육학회) 2013 한국치위생학회지 Vol.13 No.1

Objectives: In order to make a proposal of a Korean standard dental hygiene curriculum, the job description of the National Health Personnel Licensing Examination Board was analyzed to prepare a job analysis matrix of dental hygienist to select required core competency. Methods: Data were analyzed to test the job validity of dental hygienist and categorize the duties of dental hygienist. A proposal of a standard dental hygiene curriculum was mapped out by making a comparative analysis of the courses necessary for American authorization of dental hygiene curriculum, existing proposals of Korean standard dental hygiene curriculum and the courses of the departments of dental hygiene offered by domestic three-year colleges and four-year universities. Results: Basic medicine courses were reinforced or newly offered to provide an opportunity for students to transfer to a domestic four-year university or to a foreign university. In the field of clinical dental hygiene and practice, preventive dentistry, prophylaxis and practice were integrated, and the names of the related courses were unified to give a chance for students to engage in comprehensive dental hygiene practice. There were different courses for dental clinical science at present. In this proposal, students should earn 125 credits in total. Conclusions: Standard dental hygiene curriculum proposal was required by three-year and four-year colleges across the nation. To make it happen, the original names of dental hygiene courses should be used, and the dental hygiene certification and evaluation institute that is under the umbrella of the Korean Dental Hygienists Association should lay out the standard of the KSDHEP to facilitate the utilization of the standard dental hygiene curriculum proposal.