• Communications of Mathematical Education
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• v.23 no.3
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• pp.683-705
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• 2009

In this study we classify and analyze 265 papers which had been published in the Journal Series A in Korean Society of Mathematics Education from year 2000 to year 2008. We have also studied all the papers in the Journal Series A in Korean Society of Mathematics Education last 46 years based on Professor Lee, Gang-sup's paper 'A Classification and Analysis of the Articles in -From issue 1 to issue 99-'.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.1
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• pp.335-345
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• 2015

This study assessed the changes in Korea's industrial structure to analyze the linkage between years 1995-2000 -2005-2009 Industry Input-Output Tables to access the constant changes in the structure of the inter-industry linkage analysis. First, the Korean economy during the period of analysis was based on solid growth from 1,190 trillion won in 1995 to 2,775 trillion won in 2009. Second, the structure of the industry association in the case of industries, services and electronic form was as follows: in 1995, Heavy-heavy-primary, public; in 2000, service-heavy-heavy, electronic-primary, public; in 2005 Services - Manufacturing - Consumer Goods - first, public, service; and 2009 e-manufacturing - Consumer Goods - primary, the public.

• Korean journal of applied entomology
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• v.52 no.4
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• pp.395-402
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• 2013

Since 2000, a large number of molecular studies have been conducted in Hexapoda with generating large amount of mitochondrial sequences. In this study, to review mitochondrial COI sequences and their molecular studies reported in Hexapoda from 2000 to 2009, 488 molecular studies conducted based on 58,323 COI sequences were categorized according to 26 orders and the positions of COI sequences (5', 3', and entire regions). The numbers of molecular studies in which the three regions utilized varied largely among the 26 orders; however, seven orders showed preferred positions of COI sequences in the researches: Diptera and Orthoptera revealed the largest number of studies in the 5' region; while, Coleoptera, Phthiraptera, Odonata, Phasmatodea, and Psocoptera, showed the largest number of studies in the 3' region. From comparing 84 molecular studies published before 2000, we observed the possibilities that molecular studies in Coleoptera, Diptera, Phthiraptera, and Phasmatodea from 2000 to 2009 had been followed classical studies using the positions of COI sequences well-known until 1999. This study provides useful information to understand the overall trends in COI sequence usages as well as molecular studies conducted from 2000 to 2009 in Hexapoda.

• Korean Journal of Agricultural and Forest Meteorology
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• v.6 no.4
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• pp.218-234
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• 2004

Recent warm winters were evaluated for a possible shifting of the northern limit for winter barley cultivation in Korea. Therefore, safe zones for winter barley cultivation were reclassified based on the average and minimum January air temperature in recent years. The results are as follows: By analysis of mean values of January average air temperatures for 30 years (1971-2000), the northern limits for safe cultivation of hulled, naked, and malting barley were Ganghwa - Icheon - Chungju - Chunyang - Goseong, Cheonan - Geumsan - Mungyeong - Andong - Sokcho, and Gwangju - Jangheung - Sancheong - Pohang - Uljin lines, respectively. Meanwhile, based on the January average air temperature of 14 years (1987-2000) with warmer winters, the safe cultivation zone of winter barley shifted northward of the normal (1971-2000). So, the northern limits for hulled, naked, and malting barley were Pocheon - Chuncheon - Wonju - Yangpyeong - Chunyang, Ganghwa - Icheon - Chungju - Uiseong - Goseong, and Gunsan - Suncheon - Jinju - Miryang - Yeongdeok - Uljin lines, respectively. Winter barley cultivars with the strongest tolerance to low temperature can be grown up to the adjacent areas of Taebaek Mountains (that is, Inje, Hongcheon, Jecheon, and Taebaek areas). Based on January mean air temperatures of 10-year return period for 30 years (1971-2000), the northern limits for hulled and naked barley were Boryeong - Namwon - Geochang - Gumi - Goseong and Seocheon - Jeongeup - Hapcheon - Yeongdeok - Sokcho lines, respectively. It ~ppears that malting barley can be cultivated only at southern coastal areas (that is, Busan, Tongyeong, Yeosu, and Wando areas). On the other hand, based on the weather conditions of 14 years (1987-2000) with warmer winters, the northern limits for hulled, naked, and malting barley were Ganghwa - Icheon - Yeongju - Goseong, Seosan - Namwon - Mungyeong - Andong - Sokcho, and Gwangju - Jangheung - Sacheon - Ulsan - Uljin lines, respectively. The northern limit for winter barley cultivars including Olbori with the strongest tolerance to low temperature was the Ganghwa - Wonju - Chungju - Chunyang - Goseong line.

• Research in Plant Disease
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• v.7 no.2
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• pp.86-92
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• 2001

This experiment was carried out to analyze the recent epidemic of rice blast in southern provinces of Korea in 1999 and 2000. Incidences of leaf blast and panicle blast in these years were 1.5 and 2.9 times greater than those in 1998, respectively. Cultivation areas of rice cultivars, Daesan, Ilmi and Dongan bred from Milyang 95 as a recurrent parent increased over the country from 11% in 1998 to 38.4% in 2000, which were grown in more than 85% of total paddy fields in Jeonnam province. Predominant race populations of Pyricularia grisea in the farmers' fields had been changed from KJ-301 to KI-1117 in 1999 and KI-1113 and KJ-105 in 2000. Distribution ratio of the KI-1117 race in 1998 in the southern provinces was 1.7%, but increased to 30% in 1999. Although the cultivars Daesan, Ilmi and Dongan have shown wide spectrum of resistance to many races including KJ-301, they were susceptible to such races as KI-1117, KI-1113 and, KJ-105. These three races could be further classified into two sub-races, KI-1117 and KI-1117a, KI-1113 and Kl-1113a, and KJ-105 and KJ-105a based on virulence to Daesan. The newly classfied races, Kl-1113a, Kl-1117a, and KJ-l05a were also pathogenic to Ilmi and Dongan. This indicates that rice blast epidemic in southern provinces in 1999 and 2000 resulted from the breakdown of the resistance of Daesan, Ilmi and Dongan by the rapid increase of virulent races KI-1117, KI-1113, KJ-105 and their new sub-races.

• The Journal of the Korean dental association
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• v.38 no.1 s.368
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• pp.52-57
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• 2000

• The Korean Journal of Malacology
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• v.17 no.2
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• pp.85-94
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• 2001

Spawning, hatching, survival and cannibalism of the octopus, Octopus ocellatus, were investigated at the indoor laboratory. The specimens were collected in the coastal waters of Puan, Korea, from March 2000 to May 2001. Changes in the gonadosomatic index (GSI) during March to May, 2000 were similar to those in 2001. The GSI began to increase in March and reached the maximum in May 2000 and 2001. The mean fecundity of adult individuals in April was larger than those in March and May in 2000 and 2001. In the investigations of survival rates of adults according to the water layers, the mean survival rate in the middle water layer was higher than that in the bottom layer in year 2000 (p = 0.002). The survival rate during 2001 was similar to the result of year 2000 in the water layers (p = 0.018). From the investigations with the purchase dates, the survival (88.8%) in the early spawning period (April 10, 2000) showed larger than those in the mid-spawning (May 11, 2000) and the late spawning (May 23, 2000). For aquaculture, it is suggested that the purchase timing of adults in the early spawning period will have a better result than that of the other spawning periods. In the amount of spawning with water layers, the number of eggs spawned of the adults in the middle layer were larger than those in the bottom layer. In the number of eggs spawned with the purchase dates, the number of eggs spawned in the early spawning period were larger than those in the middle and late spawning periods. The size of eggs spawned were 6.904$\times$2.520 mm. the hatching period required (from spawning to hatched larvae) was 55 days (April 17 to June 7,2000) at water temperatures of 11.2 to 21.1$^{\circ}C$. In case of the hatching rates with water layers, the hatching rate in the middle water layer was larger than that in the bottom one (p = 0.004).

• JOURNAL OF ELECTRICAL WORLD
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• s.280
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• pp.38-43
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• 2000

2000년 4월 10일은 우리나라에서 처음으로 서울 종로거리에 전등이 켜진지 100년이 되는 날이다. 암흑의 천지를 밝히는 휘황찬란한 이 문명의 불빛은 지금으로부터 100년 전인 1900년 4월 10일, 어두웠던 지금의 서울 종로거리 전차매표소 부근에 3개의 전등이 켜짐으로써 이 나라에도 새로운 문명사회가 열리게 되었음을 알리는 한편, 수 천 년 동안 내려오던 우리 농경사회의 생활방식을 바꾸는 혁명적인 변화를 예고했던 것이다. 그러나 이보다 13년이나 앞선 1887년에 이미 궁중에서는 전등이 점화되어 구궁심처의 신비경으로만 알려졌던 건청궁(현 경복궁)의 전각이 대낮같이 찬연히 빛나는 불빛에 부각되어 사람들을 놀라게 했던 것이다. 그럼에도 113년이 지난 오늘날까지도 이 궁중에서의 시등일이 문헌 등에 의해 확실히 밝혀지지 않고 있다. 이 날을 기념하여 우리나라는 4월 10일은 $\lceil$전기의 날$\rfloor$로 제정하고, 1966년부터 전기산업진흥촉진대회와 함께 격년제로 기념행사를 이어가고 있다.

• 가정의 벗
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• v.33 no.1 s.377
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• pp.21-21
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• 2000

• 주택과사람들
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• s.117
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• pp.168-171
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• 2000