• Journal of Gifted/Talented Education
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• v.19 no.2
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• pp.381-404
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• 2009

The purpose of the study was to find out the usefulness of teachers' recommendation in selecting gifted students. For the study 87 teachers teaching 4th grade students from 20 elementary schools in the area of Incheon, 103 gifted students who were recommended by teacher, and 65 gifted students who were not recommended by teacher participated. To measure their cognitive ability, Raven intelligence test, creative problem solving test in science, and TTCT were used. In addition, learning methods, motives for achievement, faith in academic ability, problem solving tendency, and assignment preferences were assessed to find out their affective qualities. The results were as follows. First, the students who were recommended by teachers were highly advanced in both cognitive and affective aspects related to giftedness compared to non recommended students. Second, there were no significant differences both in the cognitive and affective aspects among the students recommended by teachers whether they passed the second step(test for giftedness) and the third step(test for academic aptitude) or not. Third, the discriminant analysis showed $70{\sim}80$ percent accuracy on teacher recommendation in identifying gifted students. The implication of the study related to teacher recommendation and future direction on identification of gifted students were discussed in depth.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37 no.7A
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• pp.560-568
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• 2012

Spectrum sensing and spectrum decision are the main functions that cognitive radios (CRs) have to perform in order to get the best available spectrum band for the establishment of a wireless communication. These problems are worsened in the presence of users with different demands and spectrum channels with different properties in a heterogeneous network. The primary objective in this work is to design and simulate a new spectrum decision algorithm for heterogeneous cognitive radio system. To this end, first, we consider all cognitive users are separated into different traffic classes according to their Quality of Service (QoS). The cognitive users within one traffic class perform spectrum sensing in centralized group-based cooperative spectrum sensing system and the users of different traffic classes share the sensing results. Second, we propose a novel use of the Analytic Hierarchy Process (AHP) to optimally select available bands according to user requirements and detected spectrum channel characteristics (SCC). In this paper, utility function is used as spectrum decision algorithm. Simulation results demonstrate that the proposed method shows can effectively select the best available spectrum channels with a low complexity.

• Archives of design research
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• v.15 no.1
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• pp.225-233
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• 2002

People's thinking and aging ways, which are spread in the abnormal situation called the reoognition panic, are different from those in the normal situation. So the design which is applied to this situation have the different points to be considered. The design in the abnormal situation is as important as that in the normal situation. This study is to evaluate the basic usability of the icons which are applied to this situation. The basic data about the recognition course, icon and metaphor have been collected and analyzed, and then the experiments based on this have been planned. The proprieties and conclusions about the ways have been generalized through accomplishing and analyzing the planned experiments. The most important meaning of this study is to suggest the examples of the usability estimating ways of the design works in the abnormal situation where the recognition panic may happen with high frequency. I hope that this study will be used for checking and improving in advance the difficulties of using the design which may happen in the real situation, by using actively the similar ways to this experiment.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.39 no.6
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• pp.603-610
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• 2015

This paper presents a multimodal sensor system that can determine the location of house space by analyzing the postures and heights of the residents. It consists of two sensors: a tilt sensor and an altimeter sensor. The tilt sensor measures the static and dynamic postures of the residents, and the altimeter sensor measures their heights. The sensor system includes a Bluetooth transmitter, and the server receives the measured data and determines the location in the house. We describe the process determining the locations of the residents after analyzing their postures and behaviors from the measured data. We also demonstrate the usefulness of the proposed system by applying it to a real environment.

• Journal of the Korea Society for Simulation
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• v.18 no.4
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• pp.9-20
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• 2009

Navigation system providing route-guidance and traffic information is one of the most widely used driver-support system these days. Most of the navigation system is based on the 2D map paradigm so the information is ed and encoded from the real world. As a result it imposes a cognitive burden to the driver to interpret and translate the ed information to real world information. As a new concept of navigation system, augmented-reality navigation system (AR navigation) is suggested recently. It provides navigational guidance by imposing graphical information on real image captured by camera mounted on a vehicle in real-time. The ultimate goal of navigation system is to assist the driving task with least driving workload whether it is based on the abstracted graphic paradigm or realistic image paradigm. In this paper, we describe the comparative studies on how map navigation and AR navigation affect for driving tasks by experimental research. From the result of this research we obtained a basic knowledge about the two paradigms of navigation systems. On the basis of this knowledge, we are going to find the optimal design of navigation system supporting driving task most effectively, by analyzing characteristics of driving tasks and navigational information from the human-vehicle interface point of view.

• The Journal of the Korea Contents Association
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• v.20 no.4
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• pp.111-123
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• 2020

It is very important to ensure usability and inclusion in product design and development. Exclusion Calculation, developed by Simon Keates and P. John Clarkson at Cambridge University's Engineering Design Center, assesses the usability and inclusiveness of the product. In context of inadequate research on effectiveness of Exclusion Calculation, this study carried out the experimental evaluation of electric iron and discussed the effectiveness of the Exclusion Calculation from usefulness, accuracy of its evaluation results and the intuitiveness of the evaluation items. 11 designers used Exclusion Calculation in product evaluation and estimated the intuitiveness of 14 evaluation items in Exclusion Calculation by questionnaire. Then usefulness of the evaluation results was discussed and the accuracy of the evaluation results was analyzed by standard deviation. From the evaluation results, the research found that Exclusion Calculation could help designers identify the usability problems and the generality of usability problems related to the physical characteristics of the products, but it can not find the problems from logical aspect of using. In addition, the ambiguity of the evaluation scale in Exclusion Calculation leads to lower accuracy of the evaluation results. Most of evaluation items in Exclusion Calculation were easy to be identified and judged, while evaluation items related to cognitive abilities are less intuitive.

• Korean journal of communication and information
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• v.68
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• pp.7-33
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• 2014

Using data from an online survey in Korea, this study examines factors affecting college students' intention to use wearable device based on an extended Unified Theory of Acceptance and Use Technology (UTAUT) (UTAUT2 Model). The results of the regression analysis suggest that performance expectancy, social influence, and facilitating conditions from original UTAUT are statistically significant variables to explain college students' intention to use wearable device. Also, the results of the data analysis reveal that added factors from UTAUT2 like hedonic motivation and price value are influential factors to explain intention to use wearable device. In addition, this study suggests that future studies need to test the UTAUT2 model in the context of new information and communication technologies.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.8
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• pp.3510-3516
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• 2011

Due to the economic recession and corporation's growth without more jobs, college graduates unemployment issue has been emerged as a serious social problem. Since the employment rate of each college became an important factor of college evaluation by the government, each college is trying to increase the employment rate of students. Therefore universities are supporting student employment through various policies and programs. However there have been perception differences in intention of employment supporting activities, final results, preparedness, student satisfaction level and overall effectiveness level of program between students and university career center staff members. The perception differences may lead not only to the waste of budget but also ineffectiveness of various programs to promote student employment. Therefore this research proposed new revised efficient employment supporting programs of universities and desirable attitude of students to increase the effectiveness of student employment based on the analysis of perception level on the several issues such as degree of usefulness of program and satisfaction level of students.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.4
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• pp.71-76
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• 2017

Visual perception is part of a field of study that examines the analysis and recognition of objects. There have been numerous studies on this topic, including research on the physiological and cognitive aspects of the visual system. Visual perception theory was established through such research efforts and the potential for its application in each field is being investigated. Mobile displays are a representative example of media in the new age. Therefore, this study is based on the understanding that research on visual perception must stress the importance of useful visual cognition. This study used displays to conduct legibility tests based on illumination intensity and contrast ratio. Two conditions relevant to legibility were tested 1) illumination intensity environment and 2) two luminance conditions proposed as measures to improve readability in existing mobile displays. The results of this study were analysed to determine the degree of legibility based on illumination intensity and contrast ratio, and measures for improving legibility were proposed.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.2
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• pp.114-122
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• 2014

Beacon transmission is one of the fundamental mechanisms in vehicular ad hoc networks. Variety services including context awareness can be embodied by exchanging beacons in each vehicle. In this paper, we propose dual beacon transmission instead of traditional single beacon transmission for beaconing mechanism. dual beacon transmission divides beacon into two functions and operates two beaconing process independently. We verified the superiority of dual beacon transmission by comparing beacon packet delivery ratio with single beacon transmission. In conclusion, dual beacon transmission can reduce channel load and have both wider communication range and effective context awareness. In addition, implementing dual beacon transmission has less complexity and appliable with conventional adaptive beaconing schemes.