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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.


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 | Konkuk University and Korea Christian University
Type: Evaluation Studies | Journal: 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.


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 Article | Journal: European journal of orthopaedic surgery & traumatology : orthopedie traumatologie | Year: 2015

Composite ceramic with polyethylene backing was introduced to enhance the quality of ceramic articulation, but the liners high rate of ceramic fracture has brought serious concern. In this study, the authors investigated the failure rate of sandwich liner in long-term follow-up patients at single institution.In this series, we retrospectively reviewed 134 patients (143 hips), and six patients (6.2%) were found to have liner fracture. They were compared to nonfracture patients to identify the associating factors. General patient characteristics were obtained through review of charts. All patients were implanted with SPH Contact acetabular cup and sandwich liner. Function (Harris hip score) and activity (Devane score) were recorded preoperatively and at final follow-up. Radiologically, inclination and abduction angles were measured for comparison.The study did not show any statistical differences between fracture and nonfracture groups in age, weight or body mass index. Side, type of stem used and radiologic parameters were not also significantly different. The operation had significantly improved function and activity postoperatively in both groups, but no statistical significance was noted between the two groups exception to preoperative Harris hip score. On inspection, retrieved ceramic heads and liners showed substantial metal transfer on their surfaces, and linear wears were evident on the ceramic heads.Compared to other studies, our series also experienced high rate of sandwich liner fracture. Though its use was generally discontinued, it is worrisome to note that failure rate of the liner will substantially increase over time.


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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