Seoul, South Korea

Korea Christian University
Seoul, South Korea
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Jung H.Y.,Seoul Womens University | Park E.Y.,Korea Christian University | Choi J.Y.,Korea University | Lee S.J.,Seoul Womens University | Noh B.S.,Seoul Womens University
Korean Journal of Food Science and Technology | Year: 2017

The objective of this study was to analyze the volatile changes occurring in retort pouches during heating using a mass spectrometry-based electronic nose. The data obtained by the electronic nose analysis was used to generate a discriminant function analysis plot. The plot showed that volatile compounds of the heated water in the retort pouch were increased by the interaction between container and water as the heating time increased. Conversely, volatile compounds of the container itself decreased when only the container was measured separately. This result means that volatile compounds from the packaging material migrated into the water. In the case of heated beef bone soup, volatile compounds were increased compared to the unheated beef bone soup after 20 min of heating. According to the results of GC/MS, nonanal and 3,5-di-tert-butyl-4-hydroxytoluene (BHT) were detected in the heated water and nonanal, heptanal, octanal, and BHT were detected in the heated beef bone soup.

Im K.H.,Electronic Commerce | Lee S.C.,Korea Christian University | Park S.C.,Kyung Hee University
Multimedia Tools and Applications | Year: 2015

Traditionally, 3D display technologies and bio-signal measurement technologies have been studied separately. If both technologies will be integrated, however, it is projected not only to maximize the effectiveness of 3D display but also to create a new market for personalized display. The purpose of this research is to suggest SMART (i.e., Specific, Measurable, Action oriented, Reliable, and Timely), which is the criteria for developing and applying personalized 3D display technologies. This research analyzes the existing multi-view 3D display and acquisition technologies, determines the technologies suitable for integration with bio-signal measurement technologies, and identifies the types of bio-signals that could create synergy with multi-view 3D display technologies. To test and apply the suggested SMART, this research conducts case study in health care field. © 2014, Springer Science+Business Media New York.

Lee S.-C.,Korea Christian University
Applied Mathematics and Information Sciences | Year: 2016

Objective: The purpose of this paper is to develop the simulation model for evaluating business values of new BM adopting new R&D technologies using pattern analysis. Method: Through the pattern analysis, the cost-based pricing and price elasticity of demand, this paper proposes the methods for evaluating business value of new R&D and how it can change the existing market Conclusions: The simulation model consisted of four modules, such as 1) calculate the quantity of sales, 2) predict the price according to cost-based pricing, 3) calculate the cost and 4) analyse the changes of the traditional market based on the formula of price. Finally, based on the modules, this conducted the simulation model, where control variables are the pattern of the growth rate and the price.Based on the above equation, this paper develops a simulation model and adapts it to a Korean service company. © 2016 NSP.

Gu J.-C.,KAIST | Fan L.,Kyung Hee University | Suh Y.H.,Kyung Hee University | Lee S.-C.,Korea Christian University
Cyberpsychology, Behavior, and Social Networking | Year: 2010

This research studies the differences between productivity-oriented (or utilitarian) and entertainment-oriented (or hedonic) usefulness for a multipurpose information system in user acceptance models, as information systems can be high or low in both hedonic and utilitarian attributes. Accordingly, perceived usefulness (PU) is divided into perceived utilitarian usefulness (PUU) and perceived hedonic usefulness (PHU) to provide a better understanding of users' intention for accepting IT. To test the proposed model more effectively, this research targets instant messaging (IM), which is an extremely popular and increasingly important communication system, both utilitarian and hedonic in nature. This research compares the difference across two groups: students for hedonic purpose and employees for utilitarian purpose. We conclude that the proposed model, which distinguishes between utilitarian and hedonic usefulness, is more effective than previous models in which the usefulness was not distinguished. Both PUU and PHU have an effect on intention to use. Employees consider PUU more important in their intention to use IM, while students are more influenced by PHU. Copyright 2010, Mary Ann Liebert, Inc.

PubMed | Showa University, Forestry & Fisheries Technology Center, Kyoto Prefectural University, Japan National Institute of Health Sciences and 2 more.
Type: Journal Article | Journal: Journal of toxicologic pathology | Year: 2016

To examine the effects of 4-methylthio-3-butenyl isothiocyanate on esophageal carcinogenesis, male 6-week-old F344 rats were subcutaneously injected with 0.5 mg/kg body weight

Kim J.-M.,Konkuk University | Kim H.-J.,Konkuk University | Park J.-M.,Korea Christian University
Journal of Food Science | Year: 2015

This study assessed the potential application of gas chromatography (GC) in detecting milk fat (MF) adulteration with vegetable oils and animal fats and of characterizing samples by fat source. One hundred percent pure MF was adulterated with different vegetable oils and animal fats at various concentrations (0%, 10%, 30%, 50%, 70%, and 90%). GC was used to obtain the fatty acid (FA) profiles, triacylglycerol (TG) contents, and cholesterol contents. The pure MF and the adulterated MF samples were discriminated based on the total concentrations of saturated FAs and on the 2 major FAs (oleic acid [C18:1n9c] and linoleic acid [C18:2n6c], TGs [C52 and C54], and cholesterol contents using statistical analysis to compared difference. These bio-markers enabled the detection of as low as 10% adulteration of non-MF into 100% pure MF. The study demonstrated the high potential of GC to rapidly detect MF adulteration with vegetable and animal fats, and discriminate among commercial butter and milk products according to the fat source. These data can be potentially useful in detecting foreign fats in these butter products. Furthermore, it is important to consider that several individual samples should be analyzed before coming to a conclusion about MF authenticity. © 2015 Institute of Food Technologists®.

PubMed | Joongbu University, Yonsei University and Korea Christian University
Type: Journal Article | Journal: Journal of physical therapy science | Year: 2016

[Purpose] This study assessed the relationships between peak toe flexor muscle strength, ankle dorsiflexion range of motion, and countermovement jump height. [Subjects and Methods] Eighteen healthy volunteers participated in the study. Each participant completed tests for peak toe flexor muscle strength, ankle dorsiflexion range of motion, and countermovement jump height. [Results] The results showed (1) a moderate correlation between ankle dorsiflexion range of motion and countermovement jump height and (2) a high correlation between peak first toe flexor muscle strength and countermovement jump height. Peak first toe flexor muscle strength and ankle dorsiflexion range of motion are the main contributors to countermovement jump performance. [Conclusion] These findings indicate that the measurement of peak first toe flexor muscle strength and ankle dorsiflexion range of motion may be useful in clinical practice for improving jump performance in athletes training for sports such as volleyball and basketball.

PubMed | Yonsei University, DaeGu Armed Forced Hospital, Gangdong Yonsei Hospital, Rehabilitation Institute of Chicago and Korea Christian University
Type: Journal Article | Journal: Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA | Year: 2016

Anterior shoulder dislocation is a common injury, but the optimal management of dislocation remains controversial. We hypothesized that reducing the shoulder in externally rotated position would aid the reduction in capsulolabral lesions. Thus, in this study, contact pressure between the capsulolabral lesion and the glenoid in free ALPSA and Bankart lesions was measured using a cadaver model.In 10 specimens, the humerus was externally rotated by abduction on the coronal plane to measure the contact pressure between the capsulolabral complex and glenoid in free ALPSA and Bankart lesions using a Tekscan pressure system. Stability of the joint was confirmed using the Vicon motion analysis system.In the normal shoulder joint, the peak pressure between the subscapularis muscle and the anterior capsule according to the location of the glenohumeral joint decreased to 83.4 21.2 kPa in the 0 abduction and -30 external rotation positions and showed a 300.7 42.9 kPa peak value in the 60 abduction and 60 external rotation positions. In both free ALPSA and Bankart lesions, the lowest pressure between the labral lesion and the glenoid was measured at 0 abduction and -30 external rotation, and the highest pressure was recorded at 60 external rotation and 60 abduction.The contact pressure between the capsulolabral complex and the glenoid significantly increased when the abduction and external rotation angles were increased. Based on our results, the conservative management in free ALPSA lesions would respond better than Bankart lesions.YWMR-12-0-038.

Lee S.-C.,Korea Christian University | Im K.H.,Pai Chai University
Journal of Computer Virology and Hacking Techniques | Year: 2015

The purpose of this paper is to study the differences of factors affecting banking behavior in multi-channel environment. This paper adopted multi-group structural equation modeling to compare the differences of causalities between internet and mobile banking. The result of causality in this paper generally supports the theory of technology acceptance model and the paths across the two groups are different. Certain relations in multi-channel are the same, for example the behavioral intention of internet banking and mobile banking usage are determined by perceived usefulness, trust and perceived ease of use sequentially. Alternatively, several differences exist in the external variables of beliefs. Internet banking regards self-efficiency and perceived ease of use more important. Mobile banking considers situational normality and trust more important. © 2015, Springer-Verlag France.

PubMed | Korea Christian University
Type: | Journal: Scandinavian journal of trauma, resuscitation and emergency medicine | Year: 2016

The mortality rate of patients with hemodynamic instability due to severe pelvic fracture is reported to be 40-60% despite a multidisciplinary treatment approach. Angioembolization and external fixation of the pelvis are the main procedures used to control bleeding in these patients. Several studies have shown that preperitoneal pelvic packing (PPP) is effective for hemorrhage control, despite being small and observational in nature. The purpose of this study was to describe a Korean trauma centers early experience with PPP in unstable patients with pelvic fractures and to evaluate its effectiveness.Between January 2012 and May 2015, 30 patients with hemodynamic instability caused by pelvic fracture were enrolled in this study. PPP has been performed in 14 patients since May 2014. Data of pelvic fracture patients with hemodynamic instability were selected from Wonju Severance Christian Hospital Pelvic Trauma Database and were analyzed retrospectively.Mean age and mean ISS were 60.418.8 years and 39.28.1 in 30 unstable patients with pelvic fracture. Mean SBP was 89.124.7 mmHg, and mean hemoglobin was 10.62.3 g/dL. When the non-PPP group (16 patients) and the PPP group (14 patients) were compared, there was no significant difference in the age, gender, ISS, and occurrence of associated injury (p=0.82, p=0.23, p=0.92, and p=0.60, respectively). Mortality rate due to acute hemorrhage were 37.5% in the non-PPP group and 14.3% in the PPP group. In the PPP group, three patients underwent PPP in the hybrid operating room, and a laparotomy was performed in three patients. Mean systolic blood pressure increased significantly after PPP (71.69.8 vs. 132.236.4 mmHg, p=0.002).In unstable patients with pelvic fractures, PPP can be used as an effective treatment, complementary to AE, to control pelvic bleeding.

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