• 한국자원식물학회지
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• 제34권1호
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• pp.73-78
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• 2021

'청나래'는 국립수목원(Korea National Arboretum)에서 2019년에 육성한 품종이다. 제주도에서 채집한 좀비비추(H. minor)를 모본으로, 외국에서 육성된 H. 'Krossa Regal'을 부본으로 인공 교배하여 종자를 채종하였다. 파종 후 얻은 개체 중 잎의 모양, 색깔 등의 형태적 특성에 차이를 보이는 계통을 우선 선발하였다. 이 중, 잎이 강건하고 화색이 연한 개체를 선발하여 영양번식과 재배를 반복하며 특성 고정 및 검정을 실시하였다. '청나래'는 대조품종인 H.'Black Hills'과 비교하여 잎이 두텁고 색이 진하며(RHS 137A) 잎자루(petiole)와 잎몸(leaf blade)이 만나는 부위에 날개가 있다. 잎몸 가장자리는 물결 모양이 뚜렷하고 화색은 흰색(White N155B)에 가깝다. 이와 같이 육성된 청나래는 분화 또는 정원용으로 활용이 가능하다.

• 식물병연구
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• 제25권3호
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• pp.114-123
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• 2019

Quantum Dot LED (QD LED) 조명은 소형의 크기, 좁은 대역파장, 긴 수명, 전자 시스템을 통한 제어가 용이하여 현재 시설재배에 이용되는 형광등, 할로겐램프, HID, HSP 램프의 단점을 보완할 수 있는 작물생육에 이상적인 광원으로서 잠재력을 가지고 있다. QD LED 조명을 이용하여 식물 병원성 미생물의 방제가 가능하다면 작물재배에 사용되는 인력 및 비용을 절감하고 화학적 방제제를 사용하지 않은 안전성 높은 생산물을 얻을 수 있다는 장점이 있다. 본 연구에서는 식물공장 및 온실에서 많이 재배되고 있는 상추에 큰 피해를 입히는 주요 식물 병원성 곰팡이에 대한 QD LED 조명의 영향과 생장억제효과를 확인하기 위해 시행하였다. 상추에 주로 발생하여 작물에 피해를 입히는 Rhizoctonia solani, Phytophthora drechsleri, Sclerotinia sclerotiorum, Sclerotinia minor, Botrytis cinerea, Fusarium oxysporum, Pectobacterium carotovorum, Xanthomonas campestris균을대상으로 QD LED 조명에 의한 균사생장억제 효과를 조사하였으며 처리한 6종류의 조명 중 BLUE (450 nm) 조명은 Sclerotinia sclerotiorum는 50 cm 거리에서 16.7%의 억제율을 보였으며 30 cm 거리에서 94.1%의 균사생장억제율을 보였다. S. minor는 50 cm 거리에서 80.4%, B. cinerea는 50 cm 거리에서 36.3%의 균사생장이 억제되었으며 30 cm 거리에서 S. minor와 B. cinerea는 100%의 균사생장억제율을 보였다. 15 cm 거리에서는 3종의 병원균 모두 100%의 억제율을 보였다. QD RED (M1), QD RED (M2)조명은 30 cm와 15 cm 거리에서 Sclerotinia minor와 Botrytis cinerea의 균사생장을 100% 억제했으며 Sclerotinia sclerotiorum의 경우 30 cm 거리에서 QD RED (M1)과 QD RED (M2)조명에 대해 각각 75.2%, 100%의 억제율을 보였으나 15 cm 거리에서는 각각 5.8%, 36.3%의 억제율을 보였다. 상추에 병원균을 접종하여 LED 광원 하에 생장을 확인한 결과 QD RED (M2)광원에서 S. sclerotiorum의 감염을 59.9% 억제하였고 S. minor는 BLUE (450 nm), QD RED (M1), QD RED (M2) 광원에서 59.9%의 억제율을 보였다. B. cinerea의 경우 BLUE (450 nm) 광원에서 84%의 높은 억제율을 보였다.

• Journal of Biosystems Engineering
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• 제15권1호
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• pp.23-32
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• 1990

Geometrical characteristics of fruit including perimeter, projected area and length of minor and major axis were calculated by computer programs to be used in fruit sorting by image processing system. The results are summerized as follows. 1. A program calculating perimeter, projected area, and length of minor and major axis by edge detection and chain code was developed. 2. Geometrical characteristics of given figures were calculated to verify the program and the discrepancies from the measured values were about 5%. 3. Regression models for estimating volums of apples were developed and regression coefficients for each variety were found. 4. Abnormal apples could be recognized by comparing the ratio of minor axis to major axis and the standard value was proposed.

• 대한치과의사협회지
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• 제56권1호
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• pp.49-57
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• 2018

The most widely used method of pain control in dental practice is to block the pathway of painful impulses by local anesthesia. For a maximum effect of pain control at outpatient minor operation, regional anesthesia including nerve block must be performed. This issue includes various dental local anesthetic techniques on mandible, maxilla and considerations for selection of dental local anesthetics according to patient's age, duration of operation. Additionally, current conscious sedation technique combined with local anesthesia will be introduced for control of patient's anxiousness. Based on patient's general condition, severity of operation, local anesthesia sometimes must be changed into general anesthesia to avoid failure of dental practice. The exact choice of anesthetic techniques for minor operations at dental outpatient clinic must not be underestimated for complete success of pain control.

• 한국직업건강간호학회지
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• 제19권2호
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• pp.217-222
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• 2010

Purpose: The purpose of this study was to assess the accuracy of references in articles published in Korean Journal of Occupational Health Nursing. Methods: All references in articles from 2007 to 2009 were compared with PubMed for authors, years, titles, journals, volume, and page accuracy. Four hundred twenty six references were reviewed. Errors were classified either major or minor. Results: Overall rate of inaccurate reference was 46.5%. 34.5% were major errors and 18.8% were minor errors. Most common major errors occurred in the authors, whereas most common minor errors occurred in the titles. Conclusion: It is necessary that authors, reviewers, and editorial committees make more efforts to enhance the reference accuracy.

• 자원환경지질
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• 제2권2호
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• pp.73-75
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• 1969

Ogbang scheelite deposit imbedded in amphibolite of unknown age was believed, by the previous workers, to be of pegmatite vein. The vein material is composed mainly of plagioclase (albite and oligoclase) and minor amount (less than 5 to 10% each) of hornblende, biotite and quartz. Orthoclose and tourmaline are accompanied in few places and scheelite and minor amount of fluorite, are the ore minerals. On the basis of mineralogical constituents of the vein, vein structures, mode of occurrence of the vein and gradational contact between veins and amphibolite, the present writer conclude that the deposit was formed by segregation from the parent basic igneous rock of amphibolite. The main portions of the deposit were formed by intrusion of ore solution into already solidified amphibolite after being segregated in deeper horizone, whereas the minor portion by segregation of ore solution in situ.

• 품질경영학회지
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• 제21권2호
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• pp.109-120
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• 1993

Most systems are composed of components which have different failure chracteristics. Since the failure characteristics of components is different, it is rational and reasonable to establish a maintenance model to be considered repair and replacement policies which are proper to failure characteristics of these components. This paper proposes the age replacement time for a system composed of components which have different failure characteristics. In this model, it is assumed that a system is composed of a critical failure component, a major failure component, minor failure component. If any failure occurs to critical component before its age replacement time, the system should be replaced. If any failure does not occur until its age replacement time, preventive replacement should be performed at age replacement time T. Major component is minimal repaired if any failure occurs during operation. Minor component should be replaced as soon as failure is found. This paper determines the optimal replacement time of the system which minimize, total maintenance cost and initial stock Quantity of minor component within this optimal replacement time. Numerical example illustrates these results.

• Journal of Welding and Joining
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• 제21권4호
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• pp.87-91
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• 2003

Effects of the circular and non-circular pad shapes on self-alignment in BGA soldering are predicted using Surface Evolver, and the calculated results are compared with experimental data. While the pad shape has minor effects on self-alignment in the vertical direction, self-alignment in the lateral direction depends on the pad direction and length ratio of the non-circular pad. Larger restoring force is obtained in the minor-axis direction than the major-axis direction, which suggests a possibility of reducing misalignment in the specific direction. The restoring force of the circular pad is between those of the non-circular pad in the major and minor-axis directions. The calculated results of Surface Evolver show reasonably good agreements with experimental data using the shear loading system.

• Annals of Clinical Neurophysiology
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• 제10권1호
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• pp.48-51
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• 2008

Since the majority of cases with unilateral peripheral facial palsy are idiopathic, radiological studies such as CT or MRI are not usually recommended for further evaluation. We report a patient with peripheral facial palsy caused by minor salivary gland tumor which was demonstrated by appropriate imaging study.

• 전기의세계
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• 제20권6호
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• pp.7-18
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• 1971

Secondary-side transfer phenomena of primary-side surge voltage in concentric-cylindrical transformers of a high turn-ratio still present a problem in transformer insulation design even in the case of a neutral solid-grounding type. The conventional methods of analyzing them so far are much complicated for practical applications. Therefore, this paper describes a new approach to the analysis of secondary-side transfer phenomena of surge in concentric-cylindrical transformers of high turn-ratio and solid-grounding type. This generalized approach is thought to be more simple with the use of minor network concepts than the conventional one by major network only. The result shows that the secondary-side transfer phenomena of surge voltage could not be neglected even in concentric-cylindrical transformer of high turn-ratio and solid-grounding type, and will be satisfactorily applicable to the design of neutral-solid-grounding type transformers.