• Journal of Korean Society of Forest Science
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• v.90 no.4
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• pp.543-547
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• 2001

An fungus gnat, Bradysia agrestis in the family Sciaridae was collected from Pinus spp. seedlings. This pest is a newly recorded insect from P. thunbergii, P. rigida, P. rigitaeda, and P. densiflora seedling. Brief morphological characters, damage symptom, host plants associated with the B. agrestis were recored. Significant variation in damaged of Pinus spp. seedling was attributed to differences between pine species(P. thunbergii : 15.4-20.0%, P. rigida : 23.1-48.8%, and P. rigitaeda : 13.8-67.5%, respectively) and sowing times(May : P. densiflora, 0%; P. rigida, 0%, July : P. densiflora, 20.0%; P. rigida, 49.4%, respectively).

• Journal of the Earthquake Engineering Society of Korea
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• v.9 no.3 s.43
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• pp.1-8
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• 2005

This paper describes a new objective methodology of seismic building damage assessment which is called Advanced Component Method(ACM). ACM is a major attempt to replace the conventional loss estimation procedure, which is based on subjective measures and the opinions of experts, with one that objectively measures both earthquake intensity and the response ol buildings. First, response of typical buildings is obtained analytically by nonlinear seismic static analysis, push-over analyses. The spectral displacement Is used as a measure of earthquake intensity in order to use Capacity Spectrum Method and the damage functions for each building component, both structural and non-structural, are developed as a function of component deformation. Examples of components Include columns, beams, floors, partitions, glazing, etc. A repair/replacement cost model is developed that maps the physical damage to monetary damage for each component. Finally, building response, component damage functions, and cost model were combined probabilistically, using Wonte Carlo simulation techniques, to develop the final damage functions for each building type. Uncertainties in building response resulting from variability in material properties and load assumptions were incorporated in the Latin Hypercube sampling technique. The paper also presents and compares ACM and conventional building loss estimation based on historical damage data and reported loss data.

• Korean Journal of Breeding Science
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• v.41 no.4
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• pp.488-495
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• 2009

In recent years, an increasing amount of research has been conducted on the yield loss of soybean crop caused by Riptortus clavatus, a serious pest of legumes. The objective of this study were to examine crop damage caused by various population densities of R. clavatus and determine the association of unique growth and seed characteristics with crop damage rate in conventional soybean fields. Major growth responses to R. clavatus were examined. The cultivars that were not as seriously damaged by R. clavatus were Pungsannamulkong, Sobaegknamulkong, Duyoukong, and Sinpaldal 2, but Myeongjunamulkong, Mallikong, and Hwangkeumkong were significantly (P<0.05) damaged. The rate of seed damage caused by R. clavatus was 8.2% in a group of brown colored pubescence, while the rate was 13.0% in a group of the gray colored. Crop damage by R. clavatus clearly more reduced in cultivars with dark hilum colors including dark brown, brown, and grayish brown than those with yellow hilum colors. Concerning pod colors, crop damage was less significant in cultivars with dark brown pod color than with the light brown. Cultivars with short pod length (4.0-4.5 cm) at full seed (R6) stage showed lower seed damage rates by R. clavatus than those with long pod length (>5.6 cm). Therefore, characteristics of hilum, pod, pubescence colors, and pod length were significantly related and linked to the cultivar resistance to R. clavatus.

• Journal of the Korean Society of Hazard Mitigation
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• v.8 no.1
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• pp.71-79
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• 2008

To find out the effect of the vegetation recovery and the problems of forest land, the researches of the mortality in pine stand and vegetation recovery have been carried out from the burned site. In area which is damaged by fire scar on crown and stem, rate of dead is higher. Where stand growing stocks were totally damaged by crown forest fire, most of vegetation was recovered by sprouts and planted seeds. Vegetation recovery power were depending on the condition of soil depth condition. For the artificial recovery, the damage happened by insects in the planted birches plantation. Rate of growth was somewhat different between Pinus densiflora and Pinus thunbergii in the plantation, because of individual growth rate.

• Journal of Sericultural and Entomological Science
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• v.18 no.1
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• pp.11-15
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• 1976

These surveys were designed to know decreasing rate of cocoon production all over the country and purchased amount of cocoons at public market which had been caused by various diseases in autumn of 1975. The results can be summarized as follows; 1. Percentage of sericuitural houses which sustain disease damage was 18.5 percent, and cocoon yield per box in bad crop houses was 8.8kg smaller than that in normal houses. 2. About 838M/T of decreased cocoons and 5.6 percent of damaging rate can be estimated in this autumn throughout the country. 3. In our country, it was 40.9 per cent of Grasseril and 34.5 per cent of Flacherie of silkworm diseases.

• Journal of Korean Society of Transportation
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• v.15 no.1
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• pp.27-43
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• 1997

본 연구의 목적은 1995년 우리 나라에서 발생한 교통사고의 인명피해비용을 추정 하는 것이다. 인명피해비용추정을 위한 방법론으로는 인적 자본법을 사용하였다. 인적자본 법의 기본이 되는 미래손실생산량의 계산은 임금을 기본으로 하지 않고 GNP를 기준으로 삼는다. GNP 상승률을 8.14%로 고정하고, 성장률에 대한 할인율의 비를 0.92, 0.94, 0.98 로 정하고, 이에 따른 할인율은 0.17, 0.15, 0.10으로 계산된다. 따라서, 각각의 비율에 따 른 총 인명피해액은 1조 2천억원, 1조 5천억원, 2조 6천억원이 된다. 또한, 평균인명피해액 을 구하면, 1억 2천 5백만원, 1억 5천 3백만원, 2억 5천 5백만원이 되며, 비용-편익 분석 을 위한 추정된 총 주행거리당 원단위 비용은 각각의 경우, 5원, 6원, 10원으로 산정 되었 다. 본고에서 추정한 총 주행거리당 원단위 비용은 도로 안전시설물 투자전 평가에 도움을 줄 수 있으리라 기대된다.

• Journal of Sericultural and Entomological Science
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• v.37 no.1
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• pp.86-91
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• 1995

Isolation and pathogenicity of Fusarium spp. from mulberry shoot rot and severity of diseases which were known as bacterial blight were examined on four mulberry varieties in Suwon, Kongju and Chuncheon, A symptom of mulberry shoot rot was initiated long brown spot on young leaves and shoots. It was developed into dark brown spot and produced white mycelia and spores on the diseased symptoms. A symptom of bacterial blight showed leaf rolling and water soaking spot and produced bacterial ooze on leaf and shoot However later stage of upper two types of symptom was hardly distinguished. Severities of shoot rot and bacterial blight were 7.5% and 4.4% in Suwon, respectively. Isolation of Fusarium spp. on shoot rot symptoms was highter than that on bacterial blight symptoms, but isolation of Pseudomonas spp. was higher on bacterial blight symptoms. Trends of pathogenicity of Fusarium spp. and Pseudomonas spp. were similar to inoculation works, and isolations of pathogenic Fusarium spp. from center of symptom was higher than that from 30cm of symptom of all samples in three cultivation areas. Disease severities of shoot rot on variety of Kaeryangppong were 13.9%, 15.9% and 17.2% in Suwon, Kongju and Chuncheon, respectively. However variety of Cheongolppong was highly resistant to shoot rot disease in three cultivation areas.

• Korean journal of applied entomology
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• v.9 no.2
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• pp.99-102
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• 1970

The present further survey is carried out to clarify the unidentified kinds of the fruit sucking moths and these damages at Suwon and Jinju fruit growing areas, in order to set up the basis of the control for the harmful moths. It was known that 10 species be recorded up to 1968 11 and, in addition, identified 4 species in 1969, such as Apatele rumicis oriens S., Leucania separate W., Scoliopteryx libatrix L. and Anomis flava F. of the fruit sucking moths in Korea. The damage ratio ib percentage of the noxious moths if $5.1\%$ on grape in Suwon and $11.8\%$ on Pears in Jinju in 1969, although it was $8.9\%$ in Suwon and 3.4\%$ in Jinju in 1968.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.22 no.3
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• pp.261-268
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• 2004

Analysis on forest through satellite image data can be obtained from normalized burn ration (NBR) and normalized difference vegetation index (NDVI) from descriptive information of reflection on the earth's surface recorded each waveband. This study focuses on the efficiency of NBR through comparative analysis after obtaining NBR and NDVI of images form 1 you, 2 years and just after the forest fire and the time of forest-preserved of the area before the forest fire in Sacheon myeon, Cangneung City where the forest fro broke out. As a result, it shows dynamic changes with greater range that differences between NBR images rather than differences between NDVI images, which means it would be better to use NBR image for the analysis of the degrees of damages from forest fire or the status of vegetation restoration and also NBR image more distinctly shows both than NDVI image in forest fro damage area.

• 수목보호
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• s.12
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• pp.21-26
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• 2007