• Korean Journal of Medicinal Crop Science
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• v.9 no.2
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• pp.150-155
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• 2001

This experiment was carried out to investigate the effect of rain shelter cultivation on growth characteristic and yield on Paeonia lactiflora Pallas. The sprouting time and flowering time of rain shelter cultivation were 9days and 15days, more quickly than that of field conditions, and stem length and number of stem per plant were many more or larger. The disease occurrence rain shelter cultivation was decreased of rust, anthracnose, powdery mildew and root rot disease compared to field conditions, and leaf spot disease was to similar. The root length, number of root and root diameter were to be good in the rain shelter cultivation. Root color and commercial ratio of rain shelter cultivation were better lighten and improved than field cultivation. Root yield of rain shelter was 2,395kg/10a, this was increased 9% and 27% respectively, compared to 2,201kg/10a, 1,892kg/10a of field A and field B.

• Korean Journal of Medicinal Crop Science
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• v.3 no.2
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• pp.116-119
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• 1995

This experiment was conducted to study the effect of intercropping system on the population of soil nematodes. The kinds of nematodes inhabitated in peony field were Meloidogyne sp., APhelenchoides sp., Ditylenchus sp., and Xiphinema sp., Meloidogyne sp., was dominant in the experiment field. The population of Meloidogyne sp., was fewer in the peony field intercropped with sesame and job's tear than intercropped with red pepper and Rehmannia glutinosa L. The occurence of powdery mildew was decreased in the peony field intercropped with red pepper and Job's tear.

• Proceedings of the Korean Society of Crop Science Conference
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• 2000.11a
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• pp.159-160
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• 2000

• Journal of KSNVE
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• v.9 no.3
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• pp.466-471
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• 1999

The prediction methods of diffraction field in barrier has beenreported much about the infinite length barrier and it is very few work that reasonable sound source was used in experiment. This study, however, has worked about the several model barrier with acoustic scale model experiment. In the case of scale model experiment, it is difficult to use the kind of source with sufficiently characteristics. A spark discharge sound source with the high repeatability, broad band spectra, small size and omnidirectivity has veen used for the prediction of diffraction field. Several model barriers with different length on the ground were considered for the experiment and compared with the the results calculated by the approximation.

• Proceedings of the Korean Society of Crop Science Conference
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• 2003.05a
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• pp.58-58
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• 2003

• Journal of the Society of Naval Architects of Korea
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• v.56 no.5
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• pp.464-471
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• 2019

The acoustic power is a major acoustical characteristic of an underwater vehicle and could be measured in a reverberant water tank. In order to obtain accurate measurement results, the acoustic field formed by the sound source should be investigated quantitatively in the reverberant water tank. In this research, the acoustic field of a reverberant water tank containing an underwater sound source has been analyzed by using an acoustic radiosity method one of the numerical analysis methods suitable for the acoustic analysis of the highly diffused space. The source level of the underwater sound source and acoustical properties of the water tank input to the numerical analysis have been estimated by applying the reverberant tank plot method through a preliminary experiment result. The comparison of the numerical analysis result with that of the experiment has verified the accuracy of the acoustic radiosity method.

• Asia pacific journal of information systems
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• v.33 no.3
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• pp.812-830
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• 2023

We propose a mobile coupon strategy designed to increase the effect of push notifications on redemption. The proposed strategy recommends that firms deliver mobile coupons with distant expiration dates and remind them through push notifications framed negatively once these expiration dates become imminent, rather than frequently sending coupons with near expiration dates. We test the effectiveness of the proposed strategy using data collected through a randomized field experiment. The findings indicate that push notifications enhance coupon redemption rates for coupons that are held longer by customers than those that are recently received. Additionally, we found that sending negatively framed push notification messages to remind customers of imminent coupon expiration dates further resulted in higher coupon redemption rates. The findings can be employed to offer useful guidance on how to effectively design mobile coupons for achieving higher redemption rates.

• Bulletin of the Korean Chemical Society
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• v.22 no.8
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• pp.789-790
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• 2001

• Proceedings of the Korean Society of Crop Science Conference
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• 1989.10a
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• pp.20-21
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• 1989

• Proceedings of the Korean Society of Crop Science Conference
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• 2000.11a
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• pp.177-178
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• 2000