• 한국식물병리학회:학술대회논문집
• /
• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
• /
• pp.98.2-99
• /
• 2003

Bacterial canker of sweet cherry (Prunus cerasus L.) was observed in farmers' orchard in Goesan, Chungbuk in 2003. Typical canker symptom occurred on the branches or twigs of sweet cherry in early spring and bacterial exudates oozed out of the cracked barks of diseased trees. Watersoaked brown symptom appeared on the leaves and severe infection caused thorough defoliation on the branches or twigs of sweet cherry. When cut the severely infected branches or twigs, irregular and rusty-colored symptoms in sapwood and heartwood were clearly found, indicating that they could serve as specific symptoms of bacterial canker of sweet cherry. The gram negative, aerobic bacterium isolated from the lesion produced fluorescent pigments on King's B agar medium but did not grow at 37$^{\circ}C$ The bacterium formed Levan-type colonies, and showed negative reactions in oxidase reaction, arginine dihydrolysis test, and pectolytic activity Based on the biochemical and pathological characteristics, the causal organism was identified as Pseudomonas syringae pv. morsprunorum. This is the first report on bacterial canker of sweet cherry in Korea.

• Smart Structures and Systems
• /
• 제15권3호
• /
• pp.627-643
• /
• 2015

Negative stiffness, previously emulated by active or semi-active control for cable vibration mitigation, is realized passively using a self-contained highly compressed spring, the negative stiffness device (NSD).The NSD installed in parallel with a viscous damper (VD) in the vicinity of cable anchorage, enables increment of damper deformation during cable vibrations and hence increases the attainable cable damping. Considering the small cable displacement at the damper location, even with the weakening device, the force provided by the NSD-VD assembly is approximately linear. Complex frequency analysis has thus been conducted to evaluate the damping effect of the assembly on the cable; the displacement-dependent negative stiffness is further accounted by numerical analysis, validating the accuracy of the linear approximation for practical ranges of cable and NSD configurations. The NSD is confirmed to be a practical and cost-effective solution to improve the modal damping of a cable provided by an external damper, especially for super-long cables where the damper location is particularly limited. Moreover, mathematically, a linear negative stiffness and viscous damping assembly has proven capability to represent active or semi-active control for simplified cable vibration analysis as reported in the literature, while in these studies only the assembly located near cable anchorage has been addressed. It is of considerable interest to understand the general characteristics of a cable with the assembly relieving the location restriction, since it is quite practical to have an active controller installed at arbitrary location along the cable span such as by hanging an active tuned mass damper. In this paper the cable frequency variations and damping evolutions with respect to the arbitrary assembly location are then evaluated and compared to those of a taut cable with a viscous damper at arbitrary location, and novel frequency shifts are observed. The characterized complex frequencies presented in this paper can be used for preliminary damping effect evaluation of an adaptive passive or semi-active or active device for cable vibration control.

• 대한의용생체공학회:의공학회지
• /
• 제34권4호
• /
• pp.218-225
• /
• 2013

In this paper hair bundle feature model and integration method for hair cell models were proposed. The proposed hair bundle feature model was based on spring-damper-mass model. Input of integrated vestibular hair cell model was frequency and output was interspike interval of hair cell that was reflected the feature of hair bundles. Irregular afferents that had a great gain variation showed reduction of negative stiffness section. Regular afferents that had a small gain variation, however, showed same feature with base negative stiffness feature. As a result, integrated vestibular hair cell model showed almost the same modeling data with experimental data in the modeled eleven frequency bands. It is verified that the proposed model is a good model for hair bundle feature modeling.

• 환경위생공학
• /
• 제21권3호
• /
• pp.9-14
• /
• 2006

From March 1, 2005 to August 31, 2006 mineral water wells were selected for 13 areas in Southeast Asia (Indonesia, Philippines, Thailand, Singapore) and 20 areas in Northeast Asia (Korea, North Korea, China, Japan) and the study on their mineral water quality was analyzed. - Mineral water quality was the best in Korea. Mineral spring waters in some area of China and North Korea and in the whole area of the Southeast Asia were of poor quality. - The hardness of mineral water was the low in Korea $(10{\sim}47mg/L\;as\;CaCO_3)$, Japan $(4{\sim}66mg/L\;as\; CaCO_3)$, Geumgang-san North Korea Area $(4mg/L\;as\;CaCO_3)$. Mineral spring water in Thailand, Indonesia $(1{\sim}97.5mg/L\;as\;CaCO_3)$ and in the other area $(120{\sim}1205mg/L\;as\;CaCO_3)$ were high degree of hardness. - pH value in the mineral water of Southeast Asia $(pH\;6.7{\sim}8.2)$ and Northeast Asia $(pH\;5.9{\sim}7.9)$ was up to WHO standard $(pH\;6.5{\sim}8.5)$. Fluorine of negative ion was found in 10 mineral waters: Indonesian mineral water 'ATARTN'(0.02mg/L), Thailand mineral water 'SIAM' (0.6mg/L), 'MASAFI' (0.02mg/L). Korean mineral water 'SAEMMULNARA' (1.1mg/L), 'SANSU'(0.6mg/L), 'ICIS'(0.3mg/L), 'DONGWON SAEM-MUL'(0.03mg/L), 'PYEONGCHANG' (0.6mg/L), North Korean mineral water 'KUMGANGSAN'(0.1mg/L), Japanese mineral water 'CRYSTAL GEYSER'(0.55mg/L). However Fluorine in the other 23 mineral waters were not detectable.

• 원예과학기술지
• /
• 제31권1호
• /
• pp.24-31
• /
• 2013

This study was conducted to determine the characteristics of quality and yield in potatoes grown at paddy field before rice transplantation during the spring season. Three potato cultivars ('Jowon', 'Haryeong', and 'Goun') were grown in Gangneung (asl 5 m) and Seocheon (asl 20 m). In both locations, weather condition belonged to the fourth zone (spring cropping) in potato production location's distribution of Korea. Daily mean soil temperature in both the locations was $0.2-0.6^{\circ}C$ lower than air temperature, while soil moisture was adequate level to potato growth in spite of spring drought. TR ratio was not affected by location, but by cultivar. Specific gravity, starch content, dry matter rate, and yield were significantly influenced by location and by cultivar. There was no difference in total tuber number by location, however there was a large gap in marketable tuber yield according to locations and cultivars. There were high negative relationships between yield and main qualities such as dry matter rate and starch content, while high positive correlation was observed between main qualities. It was possible to produce potato before rice transplanting at drained paddy fields located in representative two locations of potato spring cropping and their characteristics in growth and quality were similar to those generally well known in upland cultivation. Paddy field was thought to be more favorable than upland in terms of available soil moisture supply against spring drought. Further research, however, was needed to increase soil temperature and also preliminary review on proper cultivar according to location seemed to be needed for high yield.

• 대한지리학회지
• /
• 제48권2호
• /
• pp.167-183
• /
• 2013

본 연구에서는 한국에 출현한 황사 발원지별로 기상 특성을 파악하였다. 이를 위하여 한국의 일별 황사자료와 발원지의 일별 기상자료를 이용하여 한국에 황사 출현 시의 발원지 기상상태를 분석하였다. 한국에 출현한 황사 중 네이멍구에서 발원한 황사의 빈도가 가장 높다. 황토고원을 제외한 발원지에서 출현한 황사 일수가 최근 증가하고 있으며, 한국의 전국에 영향을 미친 빈도가 높았다. 황토고원의 경우 1960년대의 출현빈도가 가장 높았으며, 한국의 남부지방에 영향을 미친 빈도가 높았다. 한국의 황사 발생일수와 발원지의 봄철 및 4월 기상요소와 유의한 관계가 있다. 네이멍구에서 발원한 황사 발생일과 4월 해면기압, 봄철 상대습도와 음의 관계가 있다. 고비에서 발원한 황사 발생일과 4월 돌풍일수와 양의 관계이며, 4월 해면기압과 음의 관계이다. 만주에서 발원한 황사 발생일과 4월 강수량, 해면기압과는 음의 관계이다. 황토고원에서 발원한 황사 발생일과 4월 최대풍속과는 양의 관계이며, 해면기압과는 음의 관계이다.

• 한국초지조사료학회지
• /
• 제12권4호
• /
• pp.226-231
• /
• 1992

This experiment was carried out to estimate the dry matter accumulation using growth analysis in spring growth of perennial ryegrass varieties grown under space planting conditions, based on the data of previous paper9'. The results obtained were as follows: 1. Growth parameters of leaf area ratio(LAR), specific leaf area(SLA) and leaf weight ratio(LWR) were recognized siginificant differences between varieties. But, specific leaf area(SLA), leaf weight ratio (LWR) and relative tiller appearance rate(RTAR) were recognized significant differences between growth stages. Specific leaf area(SLA) was significant difference for the interaction of variety Xgrowth stage. 2. The relative growth rate of biological yields(BYRGR) indicated significantly positive correlations with relative growth rate of shoot(RGR) and root(RWGR), and net assimilation rate(NAR) as affected by the varieties and growth stages. 3. The relative growth rate of biological yields(BYRGR) indicated significantly positive correlation with nct assimilation rate(NAR) in all varieties. Leaf area ratio(LAR) had significantly positive correlation with specific leaf area(SLA) in all varieties, but shows a significant negative correlation with leaf weight ratio(LWR) of Maprima variety. 4. The relative growth rate of biological yields(BYRGR) indicated significantly positive correlations with the absolute growth rates of yield components.

• 복식
• /
• 제31권
• /
• pp.33-46
• /
• 1997

The purpose of this study was to investigate color planning method for apparel fashion de-sign and to present the method of analysis of green color. Theoretical backgrouds of color planning for fashion design were scrutinized by documentary studies Fashion color planning has been developed through 4 steps: analysis of color environment analysis of color psy-chology presentation of coordination appli-cation to fashion design. Green color environment consisted of mar-ket informations and forecast informations The former were collected by color samples which were used for women's apparel of national brands from '93 spring/summer to '96 spring/summer and the latter were analyzed by fashion forecasting books. Green color psy-chology was investigated through the docu-mentary studiess. image of green color and these expressed in fashion were revealed through documentary studies. The results of this study were as follow: 1. 117 green color samples were collected from domestic womens brand. The character-istic of samples were the yellow green in hue and pale light bright in tone. forecast infor-mation was collected through fashion forecasting books from abroad and adaption of forecast information was investigated by mak-ing a comparison forecasting information be-tween market information. In consequence national market colors reflected the forecast information in concurrence with the character-istic colors of national women's apparel. 2. Affirmative images of green were nature youth health and abundance and negative images were extraordinary misfortune wind-fall. in these images nature youth and health were mostly used in fashion.

• 대한수의학회지
• /
• 제42권2호
• /
• pp.219-224
• /
• 2002

We report the seasonal prevalence of the mycoplasmal pneumoniae of swine (MPS) in slaughter pigs from July of 1999 to June of 2000. Gross finding of lung lesion observed and examined by dot-ELISA. In gross finding of lung lesion from 750 pig samples, 465 (62.0%) was MPS, and 129 (17.2%) was single or double infection with actinobacillosis and pasturellosis. However, 156 (20.8%) had no lesion. In seasonal detection, the prevalence was found to be winter (69.5%), autumn (63.5%), summer (60.0%) and spring (54.7%) in orderly frequency. In dot-ELISA, the result was showed the positive reaction (x16>titre) with 58.0% and negative (x4

• 한국도로학회논문집
• /
• 제10권2호
• /
• pp.145-157
• /
• 2008

하중전달효율은 다웰이 설치되었거나 설치되지 않은 콘크리트포장 줄눈의 구조적 성능을 나타내기 위해 사용된다. ABAQUS 소프트웨어를 사용한 줄눈 콘크리트장의 3차원 모형이 본 연구를 통하여 구축되었다. 기층과 노상이 접착되어 구성된 하부층 위에 3개의 슬래브가 놓였으며, 스프링 요소를 사용하여 인접한 슬래브를 줄눈에서 연결하였다. 콘크리트포장의 다양한 줄눈강성을 모사하기 위하여 다양한 값의 스프링 상수를 입력값으로 사용하여 그 관계를 조사하였으며, 스프링 상수가 커질수록 줄눈의 하중전달효율이 증가하는 것으로 나타났다. 슬래브와 기증의 다양한 탄성계수와 두께를 사용하여 슬래브의 거동과 하중전달효율에 미치는 재료물성과 기하학적 형상의 영향을 분석하였다. 그 결과 노상의 탄성계수는 기층의 탄성계수와 슬래브 및 기층의 두께보다 더 큰 영향을 미치는 것으로 나타났다. 또한 양 또는 영의 온도구배에서보다는 음의 온도구배에서 슬래브의 거동과 하중 전단효율이 더 민감 하게 변화하였으며, 낮은 강성의 줄눈은 슬래브의 온도구배에 더 민감한 것으로 나타났다.