• International Journal of Advanced Culture Technology
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• v.12 no.3
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• pp.37-46
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• 2024

This study was designed to identify factors affecting polyclinic (clinical practice) during COVID-19. Fourth-year medical students at K Medical University in Daejeon, South Korea were recruited, and 64 medical students ultimately agreed to participate in a survey about polyclinics in a regional emergency center over 4 weeks. Satisfy answers for 5^th grade and 6^th grade was 15 (53.6%) and 13 (46.4%) respectively. Dissatisfy answers of observation of the ICU for 5^th grade and 6^th grade was 10 (27.8%) and 26 (72.2%) respectively. Thus, there were more satisfy answers in 5^th grade and less satisfy answers in 6^th grade(p<0.05). Based on the results of confirming significance for regression coefficient, several factors influencing the polyclinic were identified, and the following categories showed statistical significance (p<0.05): for 6^th grade, satisfy answers of the clinic hours showed 3.656 times more than dissatisfy answers, exempt from the operation room showed 21.596 times more than dissatisfy answers, observation of the intensive unit care (ICU) showed 0.054 times less than dissatisfy answers, and cares of the COVID-19 patients showed 6.962 times more than dissatisfy answers. We suggest that hybrid or virtual medical education such as the polyclinic utilizing standardized patients (SP) or augmented reality (AR) technologies at the virtual hospital or the real hospital. More medical students would be encouraged to participate the problem-based learning (PBL) or team-based learning (TBL) in so-called 'hybrid or virtual' polyclinic.

• Journal of the Korean Chemical Society
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• v.61 no.4
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• pp.204-210
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• 2017

In this study, we analyzed the descriptions of the electron movement model and the oxidation number change model presented in the 2009 revised curriculum and textbooks. We also investigated chemistry education major teachers' conceptions of limitations of each model. The electron movement model and oxidation number change model were presented in the curriculum and the textbooks. However, hybrid model was also presented which fail to grasp the limitation of each model. The hybrid model explains redox reactions of covalent bond compounds by electron movement model or even if it explains redox reactions by oxidation number change model, this explanations have the problem of confusing the virtual electron movement with the actual electron movement. A questionnaire and interviews were conducted to investigate chemistry education major teachers' perceptions of redox reactions. As results, many teachers did not recognize the limitations of each model and had difficulties to distinguish redox reactions from acid-base reactions because of the hybrid model.

• Smart Structures and Systems
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• v.25 no.5
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• pp.569-580
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• 2020

The identification of delays and delay compensation are critical problems in real-time hybrid simulations (RTHS). Conventional delay compensation methods are mostly based on the assumption of a constant delay. However, the system delay may vary during tests owing to the nonlinearity of the loading system and/or the behavioral variations of the specimen. To address this issue, this study presents an adaptive delay compensation method based on a discrete model of the loading system. In particular, the parameters of this discrete model are identified and updated online with the least-squares method to represent a servo hydraulic loading system. Furthermore, based on this model, the system delays are compensated for by generating system commands using the desired displacements, achieved displacements, and previous displacement commands. This method is more general than the existing compensation methods because it can predict commands based on multiple displacement categories. Moreover, this method is straightforward and suitable for implementation on digital signal processing boards because it relies solely on the displacements rather than on velocity and/or acceleration data. The virtual and real RTHS results show that the studied method exhibits satisfactory estimation smoothness and compensation accuracy. Furthermore, considering the measurement noise, the low-order parameter models of this method are more favorable than that the high-order parameter models.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.512-515
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• 2009

In this paper, we propose layout based multimodal contents authoring tool for Digilog Book. In authoring step, users create a virtual area using mouse or pen-type device and select property of the area repetitively. After finishing authoring step, system recognizes printed page number and generate page layout including areas and property information. Page layout is represented as a scene graph and stored as XML format. Digilog Book viewer loads stored page layout and analyze properties then augment virtual contents or execute functions based on area. Users can author visual and auditory contents easily by using hybrid interface. In AR environment, system provides area templates in order to help creating area. In addition, proposed authoring tool separates page recognition module from page tracking module. So, it is possible to author many pages using only single marker. As a result of experiment, we showed proposed authoring tool has reasonable performance time in AR environment. We expect that proposed authoring tool would be applicable to many fields such as education and publication.