• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.53 no.4
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• pp.337-348
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• 2017

The tension of warp from trawler and sea-floor contact can generate tilt and wake turbulence around otter boards. Preliminary measurements of otter board tilt and 3-D flow velocity during bottom trawl operations were taken using a vector instrument to investigate the effects of wake turbulence at the trailing edge of the otter board. Tilt data (i.e., yaw, pitch, and roll) at 1 Hz and flow data (velocities in the towing, lateral, and vertical directions) at 16 Hz were analyzed to determine their periods and amplitudes using global wavelet and peak event analyses. The mean period (${\pm}standard$ deviation) of the tilt from the peak event analysis ($5{\pm}2s$) was longer or double than that of flow velocity ($3{\pm}2s$). The two periods also had a significant linear relationship. The turbulence rate of flow was 30-50% at the trailing edge and was closely related to roll deviation. The frequency of phase difference ratios (i.e., peak time differences between tilts and flow periods) was significantly different from random occurrence in two trials, possibly due to side tidal effects. However, in the other trials, flow peaks were random, as shown by the even peak times between tilts and flows. Future studies should focus on reducing tilt variation, wake turbulence, and bottom contact to stabilize otter board motion.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.4762-4768
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• 2013

This paper investigated the impacts of theme, genre, and existence of originals on the number of visitors of children performance. Especially, we focused on the interaction effect of school periods with these variables. Using 954 performance data between 2010-2011 at Fantasia Theater run by Bucheon Culture Foundation, we found that entertaining performance, musical performance, and performance with existing originals had more visitors than others. Also, these impacts strongly existed during school periods. In result, this study found that school period should be considered seriously for the success of children performance.

• Korean journal of food and cookery science
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• v.8 no.3
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• pp.315-321
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• 1992

This investigation was undertaken for me purpose of studying me sensory and textural properties of Julpyun (Korean traditional rice cake) made by various soaking time (1, 4, 6, 8, and 12 hours) of rice during storage at room temperature. The storage periods were 2, 4, 6, and 10 hours. Sensory evaluation was done by a panel of 12 judges majoring in food and nutrition. The luation was repeated 3 times. Objective evaluation was done by rheometer and color difference meter. As a result of me sensory evaluation for Julpyun made by various soaking time and storage periods, mere were significant differences (p<0.001) in most of characteristics between soaking time and storage periods. Julpyun made by soaking time for 12 hours showed the most favorite tendency during storage periods. The result of textural properties measured by rheometer showed similar trend to those of sensory evaluation. By me color difference meter, L (lightness) value were increased by increasing the soaking time. There were significant differences (p<0.001) between me samples.

• Korean Journal of Food Science and Technology
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• v.21 no.1
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• pp.9-12
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• 1989

Sensory characteristics of acorn gels were evaluated as affected by acorn starch concentrations(7, 8, 9, 10 and 11%) and by soaking periods(4, 8 and 16 days) of acorn and acorn flour. The characteristics evaluated were color, clarity, firmness, cohesiveness, flavor and astringency. Panelists indicated in the scoring test that all the characteristics were pronounced as the starch concentration increased, except clarity, The result of ranking test on gels made with acorn starch soaked for 4, 8 or 16 days indicated that color, firmness, cohesiveness, flavor and astringency decreased, as soaking period increased. However, the soaking periods did not affect clarity of acorn gels.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.18 no.2
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• pp.144-150
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• 2006

The purpose of this study is to predict outlet temperature and humidity through underground pit for the reduction of cooling load and heating load. Commonly, the underground temperature is lower than outdoor in summer but the reverse happens in winter. When the outdoor average air temperature is $25.7^{\circ}C$ during cooling periods, the average outlet air temperature through underground pit is $23.6^{\circ}C$ with 3 m-depth and 60m-length and is $22.2^{\circ}C$ with 3 m-depth and 150 m-length. When the outdoor average air temperature is $4.9^{\circ}C$ during heating periods, the average outlet air temperature through underground pit is $7.7^{\circ}C$ with 3m-depth and 60 m-length and is $10.8^{\circ}C$ with 3 m-depth and 150 m-length. The outlet air temperature is affected by more length than depth of underground pit. The diffusion ratio of outdoor humidity is $-7.7\times10^{-8}kg/s$ in cooling periods and $9.29\times10^{-7}kg/s$ in heating periods.

• Journal of Applied Biological Chemistry
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• v.43 no.4
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• pp.258-263
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• 2000

The study was carried out to investigate the nutrient losses at a paddy field located at the southwest of central Korea from May 1, 1997 to April 30, 1998. The studying area was 10 ha. The amounts of nutrients loaded by runoff water were measured as follows. The total-N was 1,031 and $61kg\;10ha^{-1}$ during the irrigation and non-irrigation periods, respectively. The total amount of N from both periods was $1,092kg\;10ha^{-1}\;yr^{-1}$. The total-P was 23 and $2kg\;10ha^{-1}$ during the irrigation and non-irrigation periods, respectively. The total amount of P from both periods was $25kg\;10ha^{-1}\;yr^{-1}$. For percolationloss, the losses of total-N, ammonia-N, nitrate-N, and total-P were 167,30,122, and $3kg\;10ha^{-1}$, respectively. The respective loss ratios of N and P by runoff water were 55.2 and 11.9%, while the loss ratios of N and P by percolationwere 8.4 and 1.4%.

• Journal of the Korean Data and Information Science Society
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• v.21 no.6
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• pp.1237-1242
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• 2010

Based on the detailed travel history of cases from 2006 to 2008 who reside in non-malarious areas, statistical estimates of the incubation periods were obtained. The data suggest that cases fall into two categories with short- and long-term incubation periods, respectively. 72 and 25 cases successfully met our criteria for inferring the durations of short- and long-term incubation periods. The mean short- and long-term incubation periods were estimated to be 25.42 days and 328.6 days weeks, respectively.

• Korean Journal of Health Education and Promotion
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• v.20 no.1
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• pp.111-130
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• 2003

The purpose of this study was to analyze the relationship between quality of life, self-efficacy and family support of stroke patients in Oriental medicine hospitals. The subjects of this study were 211 hospitalized stroke patients in seven oriental medicine hospitals in the Busan Metropolitan, Gyeongsangnam-do and Gyeongsanbuk-do area. Data was collected through questionnaires from June 1st, 2002 to September 30th, 2002. 1) The relationship between general characteristics and other variables showed significant differences as follows : for general self-efficacy degree, age, occupation, and level of education ; for family support, level of education and occupation ; for quality of life, level of education, occupation, religion, and monthly income. 2) The relationship between disease-related characteristics and other variables showed significant differences as follows ; for general self-efficacy, level of paralysis, and periods of hospitalization ; for specific character of paralysis, level of paralysis, and periods of hospitalization ; for family support, care-giver, character of paralysis, level of paralysis, and periods of hospitalization related; for quality of life, level of paralysis, and periods of hospitalization. 3) There was a significant correlation between the quality of life and general self-efficacy, the quality of life and the specific self-efficacy, the specific self-efficacy and family support.

• International Journal of Advanced Culture Technology
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• v.8 no.2
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• pp.146-158
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• 2020

As one of the successful brand activism ad campaigns in recent years, the current study focuses on the Always #LikeAGirl campaign that took on the issue of girls and female empowerment. As a viral video marketing campaign with YouTube as their main vehicle for campaign dissemination, this study examined how Always brand activism campaigns spread on YouTube by conducting a network analysis of YouTube video networks generated by the #LikeAGirl campaign spanning across five campaign periods. Quantifiable data (i.e., views, comments, likes, dislikes, user-generated videos) and structural network patterns show that the Always #LikeAGirl campaign was successful by both standards. Although the follow-up campaign periods were not as successful as the initial campaign, the substantial amount of views, comments, likes, and user-generated content showed that the consecutive campaigns still had impact. As shown through the network patterns, the main campaign ads were central in the diffusion of the campaign during the earlier periods but that role was passed onto the user-generated contents in the later periods. Implications of the findings and future social network analysis studies in brand advertising and brand activism campaigns are further discussed.

• Journal of the Korean Society of Food Culture
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• v.4 no.1
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• pp.95-102
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• 1989

The objective of this study was to access the effects of sensory and physical properties of Beandaeduk on 7 different combination methods (three were combined with mung bean and different proportions of water; four were combined with mung bean and various cereals with constant water), and 3 storage periods (0, 1 and 3 weeks at $-18^{\circ}C$). This experiment was consisted of sensory evaluation I (appearance, texture, taste, flavor and overall preference), II (color, moisture, volume, hardness, elasticity, viscosity and ratio materials, off-flavor and oder) and physical analysis of each sample, and questionaire survey of Beandaeduk. In sensory evaluation I except flavor, significant differences (p<0.05) were found among different combination methods of sample. Also significant differences (p<0.05) were found in sample for storage periods, except appearance. In sensory evaluation II, only moisture and oder of samples were significantly different (p<0.05) for storage periods, and there were significant differences (p<0.05) in samples among different combination methods, except elasicity. Stepwise regression for storage periods in sensory I showed that texture and taste were important factors in overall preference of sample. In the questionaire survey, preference and adding materials of Beandaeduk were different according to province. Half of respondents preferred to get instant Beandaeduk and instant mung bean powder.