• Journal of the Korean Society of Food Science and Nutrition
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• v.46 no.1
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• pp.140-145
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• 2017

Pinus koraiensis cone (PKC) extract was prepared by mixing PKC with sugar at a weight ratio of 1:1 and then removing PKC after incubating the mixture at room temperature for 100 days. The resulting PKC extract was examined for its physicochemical properties and antioxidant activities using Prunus mume fruit extract, which is similar to PKC extract in terms of preparation procedure and product usage, as a control. PKC extract consisted mainly of moisture (21.76%) and sugar (70.03%), leading to high viscosity. PKC extract was apparently yellowish, and therefore its browning index and color intensity were appreciably lower than the control (P=0.0000), indicating that Maillard reaction was not facilitated during fermentation. Compared with the control, PKC extract was not appreciably different in terms of total flavonoid content, whereas its organic acid content and total reducing capacity were significantly lower. Nevertheless, its metal-chelating activity and DPPH radical scavenging activity were comparable to those of the control. In addition, SOD-like activity of PKC extract was 2-fold higher than that of 6.6 mM quercetin, which had a higher total flavonoid content than PKC extract. This indicates that PKC extract contains certain flavonoids with higher antioxidant activities than quercetin. The results show that PKC extract provides antioxidant activity as well as characteristically different sensory properties due to its higher sugar and lower organic acid contents compared with Prunus mume fruit extract.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.4
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• pp.439-445
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• 2005

Physiological activities of pileus and stipe extracts from fresh Pleurotus eryngii were examined. Electron donating ability (EDA), superoxide dismutase (SOD)-like activity, tyrosinase inhibitory effect, angiotensin converting enzyme (ACE) inhibitory activity, total polyphenol contents and nitrite scavenging ability were examined for extracts of pileus and stipe of Pleurotus eryngii extracted with water, $50\%$ and $100\%$ ethanol. Volume of the solvent used was 50 time of sample on a weight/volume basis. EDA was $88\%$ in $50\%$ ethanol extract (pileus). Also, SOD-like activity was $62.57\%$ in water extract (pileus). Tyrosinase inhibitory effects of all samples were higher than $0.1\%$ L-ascorbic acid solution. ACE inhibitory activity of water extract of pileus was found to be the highest value of $95.14\%$. In addition, total polyphenol contents were the highest in water and $50\%$ ethanol extracts of pileus $(1427.25\;mg\%,\;1426.82\;mg\%)$. Finally, nitrite scavenging ability of $50\%$ ethanol extract of pileus at pH 1.2 showed approximately $95\%$. The results will be useful for understanding the physiological activities of Pleurotus eryngii extracts.

• Journal of Digital Convergence
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• v.12 no.1
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• pp.295-303
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• 2014

This exploratory study deals with the digital policy proposal through emotional perception of real name SNS and WOM effect. Research was based on the audience trends analysis of the movies having official SNS sites and the movies not having official SNS sites among the opened 90 movies in Korea from 2012 to 2013. Therefore, researchers confirmed that the representative real SNS, facebook was utilized as emotional marketing tools and tried to analyze the effectiveness of SNS critically. The research results are the follows. First, the movies to actively utilize facebook showed statistically significant differences in terms of daily, weekly audience and seat share (occupancy ratio). It is indirectly confirmed that real name SNS such as facebook is much effective in WOM marketing. Second, in the daily trends and weekly trends, the movies showed a similar pattern and above all, the movies to actively take advantage of facebook maintained their audience trends. Thus the government and the corporation have to understand the emotional WOM effect of real name SNS for policy effectiveness. Therefore this study gives the contribution practically for boost up the policy effectiveness through emotional ripple WOM effect of the strength of weak tie of real name SNS.

• Korean journal of applied entomology
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• v.36 no.1
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• pp.88-95
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• 1997

Olfactometer was used to find the attractiveness of kairomone extracted from gypsy moth (Lymantria dispar) to the egg parasitoid (Ooencyrtus kuvanae). The attractiveness of kairomone extracted from scales and hairs which were attached to the surface of the eggs were higher than that of whole eggs with 79.9% and 67.6% respectively. The probing lantency of the egg parasitoid on the extract of scales and hairs were 115.5 sec. and that of whole eggs were 113.2 sec. Eggs taken from egg mass were shown 91.0% of attractiveness to the egg parasitoid, however only 15% of egg parasitoid were attracted by follicles dissected from the host ovary. The probing latency of egg mass was faster than that of follicles dissected from the host with 84.2 sec. and 114.0 sec. respectively. Egg parasitoid showed the most active attractiveness (88.0%), relatively longer examing period (89.2 sec.) and shorter probing latency (26.8 sec.) to the adhesive materials secreted from reproductive accessory glands of the host. Out of six organic solvents used for the extraction of kairomone from the host egg mass, n-hexane fraction received the most active response from xthe egg parasitoid and the parasitoid reared in vivo showed 3 times higher attractiveness to the n-hexane fraction than that of in vitro.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.3
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• pp.427-432
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• 2005

This study was performed to investigate the effect of natural plant extracts on acetylcholinesterase (AChE) activity and the free radical scavenging activity. The methanolic extracts of plants were tested for AChE inhibitory activity using Ellman's colorimetric method in 96-welled microplates and antioxidant activity as the scavenging effect of 1, 1-diphenyl-2-picryl hydrazyl radical (DPPH). The results showed that AChE activities were inhibited (about 20-30%) in whole plant extract of Daucus carota var. sativa, Hypericum erectum and Fragaria yezoensis. AChE activities were inhibited (about 32-34%) in stems extract of Gingko biloba and leaves extract of Rhododendrondron yedoensa var. poukhanense. Fruit extract of Zanthoxylum schinifolium inhibited (about 18%) AChE activity. And the DPPH scavenging effects as antioxidant activity were similar to L-ascorbic acid in whole plant extract of Fragaria yezoensis and fruits extract of Comus officinalis.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.5
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• pp.423-432
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• 2021

This study developed a scale to measure college students' perceived stress levels for adverse life events that may occur in their daily lives and confirmed its validity and reliability. The scale was developed in accordance with DeVellis' scale development guidelines. Data were collected from 1,242 students of a local university in 2020. The collected samples were randomly separated into two groups (A, B). Group A (N=620) was tested for an initial examination of the performance, exploratory factor analysis, multitrait-multimethod matrix, criterion-related validity, and reliability of each item; and verified with group B (N=622) for confirmatory factor analysis and reliability re-test. As a result, the final scale of 33 items and eight factors were developed. The KMO values were 0.92, and Bartlett's spherical test was significant (χ²=12532.42, p<.001); the number of factors with initial eigenvalues of 1.0 or higher was eight; the cumulative factor loadings of 71.5% and the commonality of each item was 0.56 or higher. The reliability of the scale was Cronbach's alpha 0.94; sub-factors' Cronbach's alpha was 0.78 to 0.90. Therefore, these findings suggest that the scale developed in this study would be useful for measuring the stress levels of daily life for college students.

• Journal of Korea Entertainment Industry Association
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• v.14 no.1
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• pp.75-89
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• 2020

As Marvel Cinematic Universe (MCU) Phase 3 concluded in 2019, it is time to systematically analyze the phenomenal storytelling of the franchise. In order to identify the structure of the continuous stories focusing on 'Iron Man', the central character of MCU Phase 1-3, this study used the "Save the Cat (STC)" paradigm as the tool for narrative analysis. The eight films with 1,066 minute-run time in total was analyzed based on the 15-beat STC paradigm by adjusting the distance ratio between each beat of its prototype originally based on standard films of 110 minute-run time. The results reveal that all 15 beats of the combined texts were fairly properly discovered in the positions suggested by the adjusted STC paradigm. Moreover, through the investigation, the vast text was able to be analyzed in a more comprehensive manner in the process of reconfirming the meaning of the dramatic reversals corresponding to each beat against the entire narrative. As expected, the STC paradigm proved to be a meaningful signpost for plot drives even for such a vast text. Therefore, it is believed that application of this paradigm would help not only analyze but also design other serialized franchises as well. Prior to that, however, it would be necessary to further examine the combined texts for other major characters in MCU or other franchises designed in a similar form to MCU movies through the same paradigm to verify effectiveness of such application.

• Korean Journal of Remote Sensing
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• v.38 no.6_3
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• pp.1805-1815
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• 2022

In 2022, wildfires broke out in Uljin-gun and Samcheok-si, which set the record for the longest forest fire in Korea, but there were no casualties. To protect local residents from wildfires, they must evacuate. Predicting the demand for evacuation in the event of wildfires is essential for the efficiency of disaster management. The purpose of this study is to analyze the human mobility patterns according to the occurrence of Uljin-gun and Samcheok-si wildfires. SKT floating population data was used in this study to analyze the human mobility patterns in Uljin-gun and Samcheok-si. The main findings are as follows. First, while the movement of the resident and visiting population decreased, the movement of the worker population was found to be similar to normal. Second, the resident population of Buk-myeon, Uljin-gun moved to the surrounding area to avoid the wildfires. Third, the region is an area judged to be safe from wildfires, and this mobility patterns are related to emergency disaster text messages. This study confirmed human mobility patterns of the population in the area where the wildfires through the floating population data, which is quantitative data. This suggests that it is important to guide residents to shelters through emergency text messages to minimize damage in the event of wildfires.

• Korean Journal of Health Psychology
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• v.16 no.1
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• pp.169-187
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• 2011

The present study explored psychosocial characteristics of infants with genital anomalies (GA) and their caregivers against normal controls. Participants were female caregivers and infants between the ages of 6to38months diagnosed with hypospadias(HS;n=103) or cryptorchidism (CR;n=49). Normalcontrols(n=131) were recruited and selected via Internet. Caregivers completed measures on parenting stress, coping style, social support, and infant temperament. Within the GAgroups, HScaregivers reported their greatest parental concerns as infant urination/bodily functioning difficulties whereas CRcaregivers reported worries related to surgical anesthesia issues. Both groups reported concern about their children's potential reproductive problems. Per caregiver report, infants with GA had lower ability to self-soothe. HS infants in particular were perceived as exhibiting greater negative emotion. Compared with controls, HS and CRcaregivers overall employed coping strategies more frequently and had lower interpersonal sensitivity and parental distress. However, HScaregivers emerged as experiencing higher stress when compared to the CRgroup. There were no differences in to tal parenting stress and social support scores between groups. Further, CRcaregivers reported lower levels of family discord than controls. Despite temperament-related differences between infants with GA and normal controls, HS and CRcaregivers reported lower parental distress and greater use of coping skills as compared to controls. Clinical implications are discussed.

• The Journal of Society for e-Business Studies
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• v.25 no.3
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• pp.15-40
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• 2020

Due to the explosive growth of mobile application services, categorizing mobile application services is in need in practice from both customers' and developers' perspectives. Despite the fact, however, there have been limited studies regarding systematic categorization of mobile application services. In response, this study proposed a method for categorizing mobile application services, and suggested a service taxonomy based on the network clustering results. Total of 1,607 mobile healthcare services are collected through the Google Play store. The network analysis is conducted based on the similarity of descriptions in each application service. Modularity detection analysis is conducted to detects communities in the network, and service taxonomy is derived based on each cluster. This study is expected to provide a systematic approach to the service categorization, which is helpful to both customers who want to navigate mobile application service in a systematic manner and developers who desire to analyze the trend of mobile application services.