電氣處理에 依한 무궁화의 發根效果 및 揷穗內 Auxin 含量의 變化

高大植,徐丙秀,李昌憲 전북대학교 농업과학기술연구소 1987 農大論文集 Vol.18 No.-

Hiscus syriacus shoot cuttings which are one year old, were treated with the electrical impact of cation on their base and anion on their apex by normal and reverse electrical source. On the other hand, in order to investigate the effect of auxin. they were treated with IAA 50ppm by the above two methods of electrical impact and the numbers of rooting were checked. and then auxin content of cuttings were examined by liquid chromatograph The results obtained In this study are as fellows. 1. Electrical impact has a remarkable effect In the promotion of rooting of cuttings and the accumulation of growth substance within the base part of cuttings, 2. In the case of 3.0 voltage, the effect of electrical impact was impeded. 3. In the case of the electrical impact on the base part of cuttings treated with 50ppm of IAA solution, the reverse electrical Impact was very effective. 4. In the case of 1.5voltage of 30 min., both rooting and auxin accumulation was the most effective.

硝酸칼슘이 곰솔의 發根에 미치는 影響

高大植 全北大學校 1975 論文集 Vol.17 No.-

The effet of Calcium nitrate, and its association with Indoleacetic acid (IAA) on the rooting response of black pine (pinus Thunbergii) brachy brast cutting has been demonstrated. 1. 15ppm Calcium nitrate treated in association with 15ppm IAA has more promoted effect on the rooting of cutting. 2. 30ppm Calcium nitrate appeared to be less effect than same concentrations of IAA treatment on the rooting of cutting. 3. Root development rateswere prominated in 30ppm Calcium nitrate single treatment rather than 30ppm IAA or Calcium nitrate associated with auxin.

STAM 시스템을 위한 다중구조-초음파변환기의 설계 ( Design of Multiple-Transducer for Scanning Tomographic Acoustic Microscope System )

고대식,박준석 대한전자공학회 1996 대한전자공학회 학술대회 Vol.1996 No.1

[특집/기술해설]Voice over Frame Relay/IP

고대식 대한전자공학회 1998 텔레콤 Vol.14 No.1

The Effects of Fall Prevention Exercise Programs on the Balancing Ability of Elderly Women: A Meta Analysis

고대식,박웅식 한국엔터테인먼트산업학회 2014 한국엔터테인먼트산업학회논문지 Vol.8 No.4

The aim of this study was to investigate the effects of fall prevention exercise programs on balance ability in elderly women by performing a meta-analysis. [Methods] Randomized controlled trials and clinical controlled trials published between January 2000 and September 2013 were included in this study. Fifteen of the 34 studies identified met the inclusion criteria for the meta-analysis. [Results] The overall effect size of the programs was .813. Combined exercises(1.579), aquatic exercises(1.454), Virtual Reality-based Exercise Program(1.378), fall prevention exercise programs(1.357), and resistive exercises for the lower extremities(.888) all showed positive effects on balance ability. Meta-regression analysis on continuous variables showed that as the age of the subjects increased, and treatment period frequency per week, and treatment time per session increased. In addition balance ability was enhanced. [Conclusion] There was an overall positive effect of fall prevention exercise programs on balance ability in elderly Korean women. However studies in Korea have often not reported the occurrence or frequency of falls and the studies measured the effects on risk factors in different ways. Further studies should identify the effects of fall prevention exercise programs directly because only few studies satisfied scientific research design norms.

초음파 신호의 S/N 비 개선을 위한 통계적 필터의 설계

고대식 목원대학교 자연과학연구소 1993 自然科學 硏究論文集 Vol.2 No.1

본 연구에서는 초음파 신호의 S/N비를 개선하기 위하여 SSP(Split-Spectrum Processing)를 이용한 통계적 필터링 기술을 연구분석하였다. 초음파를 이용하여 재료를 비파괴 검사할 때 재료의 그레인(Grain) 신호는 수신 신호의 S/N비를 감소시키는 원인이 된다. 초음파 신호의 SSP 수행시의 스플릿 방법을 비교 고찰하였으며 최소치 필터, 제곱평균치 필터, 절대최소치 필터등의 통계적 필터를 설계하였다. 실험을 위하여 304 스테인레스강 시료를 열처리하여 제작하였고, A/D 변환기를 이용하여 데이타를 획득한 후 통계적 필터링하였다. 실험결과, 통계적 필터를 통하여 그레인 신호를 제거할 수 있었으며 특히 절대최소치 필터링 기법을 통하여 S/N비가 13 dB 개선되었음을 확인하였다. In this study, statistical filters based on split-Spectrum Processing(SSP) have been studied for the purpose of signal-to-noise ratio enhancement. In ultrasonic nondestructive evaluation, grain signals are a serious cause that decrease signal-to-noise ratio of received ultrasonic signal. Split methods were compared and analyzed in split-spectrum processing of ultrasonic signal, and statiatical filters such as minimization filter, squared mean filter, absolute minimization filter were designed. In experiments, the heat-treated 304 stainless steel sample was made and the data acquisition was performed by using A/D converter and the signals were processed by statistical filters. In experimental results, it has been shown that the grain signals were decreased by statistical filtering and the signal-to-noise ratio was enhanced about 13 dB by absolute-minimization filtering.

산림휴양림 유형에 따른 LoRa 중계기 설치위치 설계

고대식,이재광 아이씨티플랫폼학회 2019 JOURNAL OF PLATFORM TECHNOLOGY Vol.7 No.3

In this study, the location design method of the AP according to the type of recreation forest in the LoRa - based network construction for the IoT service of National Forest Recreational Forest was analyzed and analyzed. For this purpose, 42 forest recreation forests were classified into 8 forests according to communication distance, traffic according to the number of concurrent users, and type of recreation forest area. In order to support ICT services in recreational forests, the bandwidth conditions required by ICT services are very important. In this study, we propose a LoRa - based network focusing on narrow IoT sensing data, which is bandwidth, and simulate the installation location of LoRa repeater. Simulation results show that the larger the forest recreation area and the larger the number of users, the more repeaters are needed, and the rectangular recreation forests require more repeaters than the circular ones.

同一遺傳子型 호도나무의 育成

高大植,崔萬峰 전북대학교 농업과학기술연구소 1975 農大論文集 Vol.6 No.-

Although walnut (Juglans sinensis) seedlings are rather difficult to propagate vegetatively, a relatively simple technique has been developed for obtaining pairs of walnut seedlings with identical genetic characteristics. Cutting was done in two stages about 7 days apart while the seeds were germinating in the hotbed of a greenhouse. Some of the results thus obtained are as follows: 1. Two genetically identical walnut seedlings can be produced by longitudinally splitting radicle and epicotyl in half with a razor blade while the seeds are germinating. 2. The method of splitting is relatively simple and the proportion of success of splitting seedlings was very high 90%. 3. Growth of the split identical seedlings was a little slower than normal seedlings, but despite this, the split seedlings survived and developed satisfactorily, and appearance of the split seedlings was normal under all conditions.

폐경기 여성의 신체활동 정도와 대사증후군과의 관련성

고대식,석경휴,정문성,김소희,천인애,김용남,Ko, Dae-Sik,Seok, Gyeong-Hyu,Jung, Moon-Sung,Kim, So-Hui,Chun, In-Ae,Kim, Yong-Nam 한국전자통신학회 2013 한국전자통신학회 논문지 Vol.8 No.4

This study aims to discover the relations between physical activities and metabolic syndrome in postmenopausal women, in order to present basic data for health promotion of patients with metabolic syndrome. Based on Year 2 data of the 4th Korean National Health Nutrition Examination Survey, this study discovered that the prevalence rate of metabolic syndrome of the Korean women at the menopause was significantly higher as they got older and they had less physical activities. To keep their health and prevent from metabolic syndrome, it is suggested that further research is needed to develop physical activity programs for which preferences of patients and their restrictions are considered and verify the effects. 본 연구는 우리나라 폐경기 여성의 신체활동 정도와 대사증후군과의 관계를 알아보고, 추후 대사증후군 환자의 건강증진을 위한 기초자료를 제공하기 위해 실시하였다. 국민건강영양조사 제4기 2차년도 자료 중 폐경기 여성 1,007명을 대상으로 알아본 결과 우리나라 폐경기 여성의 대사증후군은 연령이 증가할수록, 신체활동 정도가 낮을수록 유의하게 높았다는 결과를 얻었다. 폐경기 여성의 대사증후군을 관리 예방하기 위해서는 연령을 고려하여 환자의 운동 선호도, 운동제약 그리고 환자의 특성을 고려한 중간 신체활동프로그램 개발 및 프로그램 효과검증과 같은 연구가 매우 필요하다고 사료된다.

인스턴트 메신저(Instant Messenger)의 원리 및 응용

고대식,박준석 한국통신학회 2002 정보와 통신 Vol.19 No.2