일부 여대생의 운동행위단계별 우울과 생활스트레스 차이

고대식,류소연,정대인,김미정,김용남,박종 한국디지털정책학회 2013 디지털융복합연구 Vol.11 No.5

pH別 Auxin 處理가 林木의 發根에 미치는 影響(Ⅰ) : 서양측백의 揷木發根을 中心으로 Focus on the Rooting of Cuttings of Thuja occidentalis L.

高大植,崔萬峯,鄭鎭澈 全北大學校 1976 論文集 Vol.18 No.-

This study was on investigation of cuttings after 24 hrs. treatment of IBA 20ppm solution of 10 stage pH level, in order to promote rooting of cuttings of Thuja occidentalis L. The results are summarized as follows; 1. Different pH values of auxin solution for rooting promotion of cuttings were significantly influential in rooting. 2. In the cutting collected from 8-years old Thuja occidentalis L., very good results were obtained from the pH 6.0-6.5 level of 20 ppm IBA solution, good results from the pH 5.5 and pH 7 level, and poor results from the pH level near strong acid. 3. In the development of rooting system, average rooting numbers, rooted lengths and rooted weights were developed in proportion to the rooting ratio. 4. Rooting portions were observed with the naked eye to develop in formed callus and epidermis tissue, in epidermis tissue above formed callus, and in epidermis tissue above portion without formed callus. Color of callus portion was reddish-brown.

樹齡別 잣나무 揷穗內 含有物質의 時期的 變化

高大植 全北大學校 1977 論文集 Vol.19 No.-

The present study was carried out in order to investigate the seasonal changes of some endogenous substances(sugar, starch, promoter and inhibitor, catechol and pyrogallol tannin, carotenoid, chlorophyll, and C-N ratio) contained in needles and stems of cuttings of one year-old and twenty year-old of Pimus koraiensis S. et Z. from the time of their setting to rooting. The ??????????? summarized as follows; 1. At the time of collection of cuttings on October 17th, there were more inhibitors than the promoters in both type of cuttings. One year-old cuttings which are easy to root contained higher protein in needles, starch in stems and higher C-N ratio than 20 year-old cuttings which are difficult to root, however, the other substances were higher in the latter. 2. From 30 days after the settings of cuttings to the rooting period, the stems of one year-old cuttings had shown more content of carbohydrates, pyrogallol tannin and the higher C-N ratio, whereas the twenty year-old cuttings contained more protein and catechol tannin. 3. Carbohydrate and C-N ratio of cuttings increased during 60 days after setting and decreased afterwards and carotenoid showed reverse phenomena. Chlorophyll increased constantly in twenty year-old cuttings but one year-old cuttings showed increase in chlorophyll 30 days after setting and then decrease. 4. The needles of the juvenile form of cuttings contained more chlorophylls and catechol tannin 30 days after the setting, more carbohydrates and higher C-N ratio 60 days after the setting, and higher polyphenol and carotenoid content in the rooting period than those of adult forms. 5. Needles of the adult form of cuttings contained more carbohydrate, protein, pyrogallol tannin and higher C-N ratio 30 days after the setting, more chlorophyll, polyphenol and protein 60 days after the setting, and more chlorophyll and protein 128 days after the setting than those of juvenile cuttings. 6. Growth promoting substances of stem increased constantly after setting and were contained more in one year-old cuttings but they seemed to show the tendency of decrease during period. On the contrary inhibitors decreased and were contained in larger quantity in twenty years-old cuttings. 7. From the above results it may be concluded that high carbohydrate or C-N ratio, some phenolic substances and pyrogallol tannin in cuttings and pyrogallol tannin cuttings are favorable factors for rooting of cuttings are unfavorable factors for rooting. However, rootability of the pine cuttings seems to be controlled not simply by those substances but by interaction and/or conjugation of those substances with endogenous growth-promoters and inhibitors.

인터넷폰(RealPhone)의 설계 및 개발

고대식,박준석 에스케이텔레콤 (주) 1999 Telecommunications Review Vol.9 No.1

본 연구에서는 트래픽이 심한 경우에도 높은 손실 패킷복구력을 갖는 PC-to-PC 모드 인터넷 전화 소프트웨어(RealPhone)를 설계하고 그 성능을 분석하였다. RealPhone 설계를 위하여 GSM 06.10과 LPC-10 음성코덱을 이용하여트래픽이 심한 경우에는 GSM 06.10과 LPC-10을 혼용하거나 LPC-10 만을 이용하여 패킷크기를 감소시킬 수 있도록 하였다. 손실패킷 복구를 위하여 인터리빙과 복구용 잉여정보를 동시에 이용하는 새로운 형태의 복구방법을 제안하였다. 인터리빙은 지연시간을 증가시키는 단점이 있으나 5개 이상의 연집에러 복구에 효율적이기 때문에 15%이상의 높은 패킷손실하에서도 실시간 서비스가 가능한 장점이 있다. 실시간 전송 프로토콜은 잉여정보를 수용함과 동시에 패킷크기를 최소화할 수 있도록 RTP 패킷형식을 수정 제안하였다. 구현된 RealPhone의 성능실험 결과, 랜덤한 50%의 패킷손실에 대하여80%의 복구율을 보였으며, 실험에 의한 20%의 패킷 손실에 대해서도 제안한 인터리빙 방법을 적용할 경우 2%이상의 증가된 복구율을 얻었다.

섬잣나무의 夏接에 關하여(Auxin의 影響) 第 1 報

高大植 全北大學校 1968 論文集 Vol.10 No.-

The effect of IAA, (25-100ppm) and NAA,(25-100ppm) on the summer Grafting of pinus parviflora was investgated. The results can be summarized as follows. 1. Both Auxin(IAA, NAA) promoted the grafted percentage. 2. a more promoting effect was obtained from IAA than NAA. 3. water solutioncontaining 50-75mg of IAA and NAA has been found to be most accelerating the union between the scion and the stock.

초음파 SPECTROSCOPY를 이용한 비파괴검사 기술

高大植,田啓石 慶熙大學校 1989 論文集 Vol.18 No.-

In this paper, construction of the ultrasonic spectroscope system and its principle of operation have been studied, and nondestructive evaluation technique using it has been analyzed. A geometrical scattering theory has been used for the theoretical analysis of flaw charaterization (orientation, shape, size), and the shape of ultrasonic spectrum by variation of flaw characterization has been simulated with various samples. In simulation results, it has been shown that the shapes of spectrum by variation of the orientation and the size of flaw was displayed with noticeable difference, and that the spectrum was obtained from sphere, elliptical cavity in titanium sample was used for the measurement of quantitative characterization of practical flaws.

음향이미지의 개선을 위한 디지틀이미지처리

고대식,최진탁,전계석 慶熙大學校 1988 論文集 Vol.17 No.-

In this paper, the use of versatile digital image storege and processing system for scanning acoustic microscope(SAM system) has been described. In addition to the data acquisition and storage functions, different types of image processing techniques of relevance to scanning acoustic microscope have been studied and analyzed. These include gray level-thresholding and edge enhancement, spatial filtering, and pseudo-color processing algorithms. In experiment, it has been shown that these techniques could enhance particular aspects of the acoustic image of filter out unwanted noise.

초음파 현미경을 이용한 다층구조물의 해석

고대식,전계석,Ko, Dae-Sik,Jun, Kye-Suk 한국음향학회 1990 韓國音響學會誌 Vol.9 No.2

In this paper, 50MHz reflection ultrasonic microscope system with small aperture acoustic lens has been constructed in order to study the defects which lay deep in thick specimens, and acoustic images of multilayered media have been analyzed. Output characteristics of this system for multilayered media have been influenced by acoustic attenuation, aberration in specimen, type of lens and the properties of a defect, and it has been used for image processing of the multilayered I.C. and the bonding layer. In experimental results, it has been shown that small aperture ultrasonic microscope system was powerful tool for inspection of thick specimens such as electronic device, bonding layer, quality of ceramic materials. 본 연구에서는 수 파장 이상의 깊이에 존재하는 결함을 탐상하기 위하여 50MHz의 중심주파수에서 동작하는 small aperture형 초음파현미경을 구성하였고 다층구조 샘플에 대한 영상을 연구분석하였다. 다층구조물에서의 출력특성을 음향감쇠, 수차, 렌즈형태, 샘플의 특성에 영향을 받으며 이것은 다층구조 I.C.와 bonding층 탐상에 이용할 수 있다. 실험결과, small aperture형 초음파현미경은 large aperture형 시스템에 비하여 두꺼운 샘플의 탐상에 유리하며 타 도구에서 관찰이 어려운 다층구조의 층별 탐상과 내부구조의 변형상태등을 2차원 영상으로 탐상할 수 있는 유용한 도구임을 확인하였다.

고정묘포의 재해와 그 대책

고대식 한국양묘협회 1977 韓國養苗協會誌 Vol.5 No.-

인터넷상의 음성 패킷손실과 명료도 측정 ( Measurement of Voice Packet Loss over the Internet and Percentage Articulation )

고대식,박준석,최용훈,강성훈 한국통신학회 1997 한국통신학회 학술대회논문집 Vol.16 No.1