• Journal of the Korean Society of Food Science and Nutrition
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• v.46 no.3
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• pp.320-326
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• 2017

This study investigated the water extracts of fallen pear (FPWE) on tyrosinase activity and melanogenesis. In the present study, we examined the effects of FPWE on mushroom tyrosinase activity in vitro, B16F10 melanoma cell tyrosinase activity, melanin contents, and expression of melanogenic enzyme proteins such as tyrosinase. An apparent down-regulatory effect on tyrosinase activity was observed when B16F10 cells were incubated with FPWE. Results of melanin assay using B16F10 cells treated with different concentrations (50, 125, and $250{\mu}g/mL$) of FPWE showed a dose-dependent decrease in melanin content. To determine whether or not FPWE indirectly affects tyrosinase activity, we assessed mushroom tyrosinase activity upon treatment with various concentrations (125, 250, 500, and $1,000{\mu}g/mL$) of FPWE. In addition, we investigated changes in the protein level of tyrosinase by using Western blotting. Tyrosinase and microphthalmia-associated transcription factor expression levels in B16F10 melanoma cells were reduced in a dose-dependent manner by FPWE. These results suggest that FPWE reduced melanin formation by inhibition of tyrosinase activity. Therefore, we suggest that FPWE could be used an effective whitening agent for skin.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2005.04a
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• pp.41-47
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• 2005

본 연구는 속리산국립?공원에 위치하고 있는 낙영산탐방로에 대하여 탐방로 관리와 공원관리에의 기초적인 자료제시를 목적으로 낙영산 탐방로 3곳에 대한 통행량 조사와 탐방로에 대한 훼손존사를 실시하였으며 이에 대한 결과로서 낙영산을 찾는 등산객은 대부분 공림사를 통해서 낙영산정상을 경유 매표소로 내려오는 비정규 탐방로를 이용하여 있었으며, 이를 분석해본 결과 주차장문제와 탐방객극 인식과 홍보 부족인 것으로 나타났다. 공림사$\~$낙영산구간에 대한 훼손이 대단히 심각한 상태이며 뿌리노출이 가장 흔한 훼손의 유형으로 나타났다. 낙영산탐방로의 평균 나지폭은 2.6m이며, 평균최대침식깊이는 1.25m이며 종속변수인 침식에 대한 각 요인별 회귀분석결과 경도에 대해서는 음의 상관관계를 입장객과 물매와는 양의 상관관계나 나타났다. 이는 탐방객의 홍보를 통한 인식의 변화와 탐방객의 입장에서의 적절한 탐방로의 지정과 출입통제와 현재 훼손된 지역에 대한 노면정비와 훼손지복구를 실시해야 한다는 것을 의미한다.

• Journal of Digital Convergence
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• v.16 no.1
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• pp.431-438
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• 2018

This study aimed to investigate the differences of perceived stigma, psychological empowerment, job satisfaction according to the working hours by latent means analysis(LMA). To get the results, a survey was conducted, targeting employed people with mental illness. Key outcomes of the analysis were as follows. First, it was verified that perceived stigma and job satisfaction, psychological empowerment had statistically meaningful direct relationships. Second, it was analyzed that psychological empowerment had a partial mediating effect in the relationship between perceived stigma and job satisfaction. Third, according to LMA, full-time group showed higher latent mean values on the perceived stigma and lower latent mean values on the job satisfaction. However, part-time group showed lower latent mean values on the psychological empowerment. Based in these results, comprehensive interventions for activating job satisfaction were proposed.

• Korean Journal of Agricultural Science
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• v.10 no.1
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• pp.74-83
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• 1983

In order to examine the relationship of fruit abscission and ethylene evolution in 'Jojuro' and 'Imamuraaki' pear trees, the thinning chemicals, ${\beta}$-naphthalene acetic acid (NAA), O, O-dimethyl-O-(3-methyl-4 nitrophenyl) posphorothioate (MEP), 1-naphthyl N-methyl carbamate (carbaryl), and 2-chloroethyl phosphonic acid (ethephon) were applied. Concurrently the effect of calcium acetate on the control of fruit abscission were examined when calcium acetate was added to ethephon and carbaryl. 1. All the applied chemicals (MEP, NAA, carbaryl and ethephon) was effective to abscise fruits in 'Jojuro', and MEP and carbaryl in 'Imamuraaki's. 2. The application of ethephon increased the ethylene evolution but other chemicals did not increase it. 3. There were no significant differences in total sugar contents of fruits by MEP, NAA, carbaryl and ethephon treatments. 4. When the calcium acetate was added to the ethephon and carbaryl, the thinning effects were offsetted. 5. The rate of defoliation due to ethephon treatment was controlled by addition of calcium acetate at 0.1~0.25 M. It was clarified that fruit abscission induced by thinning chemicals except ethephon was not directly related to ethylene production and that degree of fruit thinning can be regulated by addition of calcium acetate to thinning chemicals.

• Journal of Digital Convergence
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• v.18 no.1
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• pp.343-355
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• 2020

The purpose of this study was to analyze the relationship between game addiction and social stigma of adolescents outside school. After examining the previous research focusing on the Public stigma & Self-stigma theory, We intended to examine how game addiction and social stigma affect each other over time, and the time causal relationship between the both. Using youth outside school panel 3rd, 4th, 5th data, This study analyzed the relationship between game addiction and social stigma of adolescents with school interruption longitudinally. The research method was analyzed by autoregressive cross-lagged model using two variables such as game addiction and social stigma using Amos25 program. The results showed that game addiction did not significantly affect social stigma at the next time, but social stigma had a significant effect on game addiction at the next time. Game addiction and social stigma have a strong auto-regressive effect, and the degree remains constant over time. Accordingly, this study suggested social co-prosperity, support from the local community, multidisciplinary viewpoints and cooperation between the public and private sectors.

• Journal of the Institute of Electronics and Information Engineers
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• v.53 no.1
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• pp.153-158
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• 2016

A detection algorithm of fallen pear bags caused by natural disaster like heavy rain, typhoon, hurricane, etc. is presented in this paper. The algorithm is developed for the gray pear bags with printed characters which are widely used at pear farms at Sangju and Naju producing large quantity of pears for export. It sets a region of interest (ROI) at first and then eliminates the regions having chromatic color in ROI. Morphological operation and prior information are used to eliminate small noises and several unusual regions and finally the regions of fallen pear bags are remained. The remained regions are analyzed and counted to estimate the scale of damage. Test images are consisted of the images taken at pear farms of Sangju and Naju at 2014. Experimental result shows that the detection rate of pear bags is more than 90% and also the proposed system can be implemented in real-time using hand-held devices because of its simple and parallel architecture.

• Horticultural Science & Technology
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• v.18 no.3
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• pp.391-394
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• 2000

Girdling and girdling+pinching treatments on 'Sekaiichi' apple remarkably reduced June drop and accelerated fruit growth in early stage of fruit development. Girdling+pinching and pinching reduced bourse shoot growth compared with non-treated control. There were no significant differences in flower bud formation in the following year among treatments. It was assumed that the optimum period for girdling is between 5 days before full bloom and full bloom period.

• Korean journal of applied entomology
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• v.54 no.2
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• pp.121-125
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• 2015

This study was conducted to examine the feeding effect of Halyomorpha halys ($St{\aa}l$) (Hemiptera: Pentatomidae) on the fruit drop and decay rate of Mandarin citrus fruits (Citrus unshiu). The feeding of H. halys before fruit coloring caused a severe fruit drop, while the feeding after fruit coloring induced a low level of fruit drop. However, the feeding of H. halys before or after fruit coloring did not induce significant fruit decay during cold storage. The results are expected to be useful in managing H. hlays of late season mandarine, because citrus farmers follow calendar spray to prevent fruit drop and fruit decay.

• The Journal of the Korea Contents Association
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• v.21 no.4
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• pp.533-544
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• 2021

This study was focused on social stigma in utilizing community child centers which are selective child welfare institutions. The study model derived from the stress process model. The purpose of this research was to investigate the effects of stigma on happiness among children in community child centers and mediating effects of empowerment and community social capital as coping resources. The data were collected from 5, 6th grade students who are attending community child centers located in Daegu and Gyeongsan city. Data of 175 were analyzed and SPSS Process Macro and bootstrapping method were used. The results of the study were follows. First, stigma among children in community child centers showed significant direct effects on happiness. Second, empowerment and community social capital had significant mediating effects on the relationship between stigma and happiness. Based on the results, the policy and practice implications to improve happiness of children in community child centers were suggested.

• 월간낙농육우
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• v.29 no.7
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• pp.134-137
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• 2009