일본의 첨단기술산업화에 있어서 과학기술정책의 역할

김종천 한국질서경제학회 2000 질서경제저널 Vol.3 No.1

한국경제의 당면과제로서 첨단기술산업화는 산업체의 연구개발활동 활성화를 요구하고 있는데 이를 위하여 효과적인 과학기술정책이 수행되어야 한다. 이러한 관점에서 1970년대 중반 이후 일본의 첨단기술산업화 전략은 성공적인 예로서 우리에게 많은 것을 시사해 줄 수 있다. 일본의 첨단기술산업화에서는 전략산업분야의 연구개발활동을 활성화하기 위하여 다양한 정책이 수행되었는데, 구체적으로 공공의 연구개발활동, 구매정책, 산업조직정책, 공동 연구개발 프로젝트 및 국내시장 보호정책 등으로 분류할 수 있다. 이러한 정책들은 일본이 1980년대 이후로 첨단산업국가로 세계경제의 전면으로 부상하는데 크게 기여하였다.

우리나라 矮性사과나무의 樹形에 關한 硏究 Ⅰ : 京畿, 江原, 忠南, 忠北 사과地帶의 樹形에 관하여

金鍾天 建國大學校附設農業資源開發硏究所 1989 農資源開發論集 Vol.14 No.-

This study was carried out to develop more suitable tree form of dwarfed apple trees than the one which are being used by apple growers these days in KOREA. The present methods of training and pruning related to the tree form of dwarfed apple trees surveyed and investigated at four major apple growing regions. The results obtained are summarized as follows; 1. Most of apple growers in the four regions are not practiced in the training of dwarfed apple trees. Therefore they have trained dwarfed apple trees by the method of modified leader type, which is known to be suitable for vigorous common apple trees. 2. Most of rootstocks for dwarfed apple trees in the four apple regions were M26 and MM106. A few of M27 was used in Wonju area. 3. The planting distance of the trees grafted on M26 rootstocks was 4×2m or 4×3m between row and space in row. Most of the trees had overlapped crown since they have been trained by modified leader type. The ones trained by the spindle bush type, even though very few trees were observed, did not show the overlapped crown. 4. Trees grafted on MM106 rootstock are planted in the distance of 5×3 or 5×4m between row and space in now. Most of the trees are trained by modified leader type with many secondary branches being resulted the overlapped crown. 5. The present study suggests that the dwarfed apple trees of the M26 rootstock planted by 4×2m should be trained by slender spindle bush type and those by 4×3m, by the dwarfed central leader type. 6. In case of the apple trees grafted on MM106, the dwarfed central leader type are suggested for those planted by 5×3m, and the dwarfed modified leader type, for those of 5×4m.

Ad Hoc 통신망 프로토콜 개발동향

김종천,김영용 에스케이텔레콤 (주) 2002 Telecommunications Review Vol.12 No.3

최근 들어 이동단말기간의 다중 무선 홉을 사용하여 시스템간의 데이터 전송을 가능하게 하는 Ad Hoc 통신망에 관한 연구가 활발하게 진행되고 있다. 특히, 모든 단말의 이동성을 고려하지 않는 기존 프로토콜들은 사용할 수 없으므로 Ad Hoc 통신망 지원을 위한 프로토콜 연구가 활발히 진행되고 있다. 본 논문에서는 Ad Hoc 통신망 개요와 프로토콜 개발현황을 링크계층, 네트워크계층, 전송계층으로 구분하여 소개한다.

왜성사과 재배 현황과 그 전망

김종천 한국작물보호협회 1980 자연과 농업 Vol.1 No.7

중심화가 수정된후 약제처리해야 - 과수의 인공수정과 약제 적과요령

김종천 한국작물보호협회 1983 자연과 농업 Vol.4 No.5

사과 주요병충해 진단과 방제

김종천 한국작물보호협회 1984 자연과 농업 Vol.5 No.6

적정면적재배와 품질향상에 주력해야 $\circledcirc$ 불황 극복을 위한 과원 경영계획

김종천 한국작물보호협회 1984 자연과 농업 Vol.5 No.1

우리나라 果樹의 果種別 品種構成比率 決定에 關한 硏究

金鍾天 建國大學校附設農業資源開發硏究所 1988 農資源開發論集 Vol.13 No.-

This study carried out to determine the ideal composition ratio of each cultivar for apple, pear, peach and grape in Korea. The monthly amount of the fruits arrived at 8 main fruit market centers was surveyed. The fruit characters, the ripening period and the keeping quality etc. for each cultivar were also checked. The results obtained are summarized as follows: 1. May and June appered to be a short supply period and March, April and July insufficient supply period in the total amount of fruits, while in the other season, sufficient amount of fresh fruits were being supplied. 2. The supply of apple decreased rapidly from May to August, particularly in June and July appearing short supply period. The breeding of extremely early ripening varieties for the demand in May and June is also required. For the great demand of apple in Chusuk, the Korean thanks giving day, high quality apple cultivars ripening from the middle of September to the middle of October are urgently required. 3. The supply of pear in June, July and August is so insufficient that the early ripening cultivars are required for the July and August demand and the high quality keeping cultivars for the June demand. 4.Peach was supplied mostly in July, August and September, and particularly the over supply in August made the price down rapidly. Therefore, earlier cultivars for the June demand and late ripening cultivars for the October demand are required to extend the peach supplying period from the present 3 months to the 5 months in future. 5. Grape was supplied mostly in August and September, and particularly the over supply of Campbell early variety in August made the price down seriously. Therefore, earlier ripening cultivars for the July demand and later ripening cultivars for the October demand are required. 6. The study suggested an ideal diagram to extend the supplying period of apple, pear, peach and grape through the consideration of variety combination and the above mentioned problems.

우리나라 矮性사과나무의 樹形에 關한 硏究Ⅱ : 慶尙北道의 北部 및 南部 사과地帶의 樹形을 中心으로 Refer to the tree form in major apple growing regions of north and south part of Kyongsang buk-do

金鐘天 建國大學校 附設 農業資源開發硏究所 1990 農資源開發論集 Vol.15 No.-

This study was carried out to develop the methods to get more suitable tree shape of dwarfed apple trees than those which are being used by apple growers in Kyongsang buk-do these days. The present methods of training and pruning related to the tree shape and several other items of dwarfed apple trees were surveyed and investigated in major apple growing regions of Kyongsang buk-do. The results obtained are summarized as follows. 1. The rootstocks for dwaried apple trees in apple regions of Kyongsang buk-do were mostly M26 and MM106 in a little amount. Most of dwarfed apple trees in this region were younger than 5∼8 years implying that the dwarf apple trees were planted more lately than the other provinces. 2. The planting distance of the trees grafted on M26 rootstock was 4×3m or 5×5m between row and space in row. 3. The standard sootstock occupied about 78% of the apple growing area in both North and South part of Kyongsang buk-do as yet. The newly planted apple trees were entirely the dwarfed ones. 4. Most of dwarfed apple trees grown in this area were trained to have 10∼15 small main branches without secondary branch on vertical main stem. So that the shading by the overlapped crown should be avoided. 5. The present study suggested as follows; 1) The dwarfed apple trees of the M26 rootstock should be planted 4×2∼2.5m between row and space in row on infertile soil and trained by slender spindle bush type. 2) Those dwarfed apple trees will be planted 4×3∼3.5m between row and space in row on fertile soil and trained by dwarfed central leader type. 3) Apple trees of the MM106 rootstock should be planted 5×4m distance between row and space in row on infertile and 6×4m on fertile soil and trained by dwarfed modified leader type. 4) Standard apple trees will be planted 8×8m or 9×8m space according to soil fertility and trained modified leader type.

熱處理, LCA 條件發生劑 및 Grape guard 處理가 油桃 秀峰 品種(Prunus persica var. nectarina Maxim)의 貯藏中 品質에 미치는 影響

김종천,박서준 건국대학교 1997 學術誌 Vol.41 No.2

This experiment was conducted to examine the pretreatment effects on freshness retention after 30 days storage under condition of 2±1℃ heat treatment, LCA conditioner, and grape guard were utilized as pretreatments and applied to the "Subong" Nectarine. Pretreatment by heat under 38℃ for 48 hours revealed that total quantity of ethylene was decreased at the begining period. However, after 10 days storage, (i) Quantity of ethylene was decreased, (ii) density of CO2 was increased, (iii) density of O2 was decreased, (iv) softening of flesh was inhibited, and (v) both firmness, external appearance and taste of the fruit were better, comparing to the other treatment. But soluble solid concentration and pH were almost the same to the other treatment. The results by the pretreatment by heat under 38℃ for 24 hours were almost same to the pretreatment above. However lowered firmness, increased pH and flesh softniing led to poor appearance and taste. As a result, quality of fruit became low. Pretreatment by LCA conditioner was very effective in reducing ethylene in a bag and pH was increased. However, freshness retention by this treatment was not good because of lowered firmness of flesh, severe softening, and poor appearance and taste. Pretreatment by grape guard brought about pericarp damage, which might caused by 502. Therefore, this method was not good for freshness retention: (i) poor appearance, (ii) increased pH, (iii) lowered firmness, and (iv) softening.