• Journal of Educational Research in Mathematics
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• v.21 no.2
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• pp.121-134
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• 2011

Stevin is known as the inventor of decimal fractions, even though many mathematicians had the concept of decimal fractions and used it before Stevin. Why? To respond to such a question, we studied about its significance which 'La Disme' had in the history of mathematics. These can be summarized as its notational aspect, the manner of developing the book, the conceptual revolution and the practical purpose. And the chapter and verse of are little known when compared to its reputation. So in this paper we considered its contents in detail and discussed some didactical implications in relation to teaching and learning of decimal fractions in elementary school : importance of place values, similarity of calculation to natural numbers, using common fractions to justify, emphasis on the applications of decimal fractions, relation to measuring units, necessity of teaching number sense, using notational aspects.

• Journal of KIISE:Software and Applications
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• v.37 no.5
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• pp.411-415
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• 2010

The Conflicts between requirements may cause a failure of functions or even project. Currently, most of researches have focused on identifying requirements and some researchers have tried to resolve requirements conflicts but it was only based on requirement priority. This paper proposes the Creative Requirements Conflict Resolution (CRRC) to resolve requirement conflicts in a creative way using TRIZ methodology. TRIZ, which means the theory of solving inventor's problems, is made based on the analysis of over 2 million patent cases and helpful for developing a creative solution to resolve conflicts. CRRC classifies requirement conflicts into groups and then apply TRIZ theory related to each group. At the result of control experiment, CRRC provides the various kinds of creative solution for requirement conflicts.

• Journal of Advanced Navigation Technology
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• v.21 no.1
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• pp.72-77
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• 2017

In recent years, internet of things (IoT) technology has developed rapidly and has been applied in many fields. IoT devices collect and analyze information in various environments and provide useful information to users. Due to the recent increase in IoT devices, many open source platforms based on hardware and software that are cheap and easy to use have been developed and provided. In this paper, we have studied the IoT system based on Arduino which can communicate Bluetooth wireless data with smart phone in real time. And we have developed a wireless system control app based on App Invertor 2 for communication with Android smart phone. Also, we propose an IoT system based on Arduino which can control the devices and implement the function of connectivity between devices.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.37 no.4
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• pp.37-45
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• 2000

In this paper we suggest a method of detecting the two eyes position of moving viewer by using images obtained through a color CCD camera, and also a method of rendering view-dependent 3D image which consists of depth estimation, image-based 3D object modeling and stereoscopic display process. Through the experiment of applying the suggested methods, we could find the accurate two-eyes position with the success rate of 97.5% within the processing time of 0.39 second using personal computer, and display the view-dependent 3D image using Fl6 flight model. And through the similarity measurement of stereo image rendered at z-buffer by Open Inventor and captured by stereo camera using robot, we could find that view-dependent 3D picture obtained by our proposed method is optimal to viewer.

• Journal of the Ergonomics Society of Korea
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• v.34 no.5
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• pp.455-467
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• 2015

Objective: The present study suggested practical measures for successful patent registration based on a review of success and failure cases of patent application filed based on inventions obtained from physical ergonomics research. Background: The protection of intellectual property (IP) contributes to economic growth and competitiveness and facilitates innovation and creativity. IP rights are pursued on research findings for effective technology transfer and commercialization; however, a patent application can be rejected if patentability requirements such as patent eligible subject matter, utility for industrial application, novelty, or non-obviousness are not satisfied. Method: Three successful and three failed cases of patent applications based on physical ergonomics research were reviewed, critical reasons for their successes and failures were examined, and measures were proposed to avoid failures in patent registration. Results: The following measures were identified based on the patent application case review. First, abstract ideas including logical procedures and/or mathematical formulas need to include use of tangible apparatus and methods in idea realization. Second, the provision of grace period inventor disclosure exception needs to be properly followed in case an invention is disclosed before filing of patent application. Lastly, a comprehensive analysis of prior art published or publicly known anywhere in the world and a claim preparation of distinguished, non-trivial features compared to prior art solutions are needed to avoid possible violation of novelty and non-obviousness. Application: The proposed measures can help to prepare a patent application with patent eligibility.

• Anxiety and mood
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• v.11 no.2
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• pp.120-128
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• 2015

Objectives : The Minnesota Multiphasic Personality Inventory (MMPI) is a commonly used psychological test measuring personality and psychopathology in both clinical and non-clinical population. This study was to evaluate characteristic MMPI-2 profile associated with the risk of suicide among college students. Methods : We analyzed the survey response of 2,964 college students who participated in a health survey from a school health center at a national university in 2011. Those who endorsed any of six items on the suicidaity module of MINI were classified as a suicide risk group and remaining students who did not as a control group. Then we compared the Patient Health Questionnaire (PHQ-9) score, the MMPI-2 Clinical scales and Restructured Clinical (RC) scales. To evaluate the correlation RC scales with suicidality score, Pearson correlation analysis was performed. Results : The suicide risk group was 464 students, and the control group was 2,500. The classification result of suicidality, 255 (8.6%) students were low-risk group, 149 (4.8%) students were moderate-risk group and 60 (2.0%) students were high-risk group. In the suicide risk group, VRIN, F scale, Clinical scale and RC scales were significantly higher. In the control group L, K and S scales were significantly higher. Suicidality score has significant correlation with all RC scales. Conclusion : In the suicide risk group, overall psychopathology was higher than the control group. Taken together, features of depressive symptom, antisocial behavior, aggressiveness, introversion may indicate the risk of suicide in college students. These results display both clinical and public health implications for clinicians and school health professionals.

• Journal of Technology Innovation
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• v.25 no.3
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• pp.265-297
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• 2017

As corporate management enters the era of informatization or knowledge management, the level of patent quality, which is the fruit of R&D and technical innovation, is an important element of corporate competitiveness in this age of unbridled competition. This study analyzes the relevance between R&D stocks and 6 types of knowledge stock (patent quality) and corporate market values in utilization of related research models. With Tobin Q model utilized, 108,851 U.S. patents (observed value per year: 2,795) registered by 402 domestic enterprises were analyzed. As the Hall model was analyzed, it turned out that the R&D stock/asset, claim stock/patent stock, and citation stock/patent stock had positive effect on corporate market values. The inventor stock/patent stock also show positive effect on corporate market values.

• Science of Emotion and Sensibility
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• v.8 no.3
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• pp.231-240
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• 2005

The social participation and economic position of the woman come to be high, they are rising to the market as a core consumer and trend inventor leading the fashion. So that, we have to recognize the woman with one axis of product development, it is necessary to the product development and the strategy which it will put woman oriented sensibility in product design. From this research, it reviews the backgrounds from social culture and the economic marketing sides through the digital product recently, it analyzed the features of woman characteristic designs which is embossed the product. Also it connected actual product development, it developed a woman oriented sensibility audio which reflected a woman's consuming trend, life style and the preference product style. It proposed the necessity of woman oriented product development ultimately and researched the product design strategy for the reflection of woman sensibility.

• Journal of Engineering Education Research
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• v.21 no.2
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• pp.39-50
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• 2018

In the 4th industrial revolution, the maker movement is spreading around the world with the fusion of advanced technology with product manufacturing. Already in developed countries such as the US and Japan, the emphasis is on maker education that integrates education into traditional makers' movement. Through this, we are fostering young talents who will lead the fourth industrial revolution era. Domestic maker education is mainly performed in the maker space, and is limited to the IT field using Arduino and App-Inventor. Therefore, it has the limitation of fostering IT-oriented makers. Therefore, it is affecting the proliferation of the maker's movement because of the difficulty of participation of the general public. The purpose of this study was to understand the characteristics of maker 's movement and to suggest the direction of Korean maker education. In order to accomplish the purpose of research, we analyzed the case of convergent maker education at D Creation Economic Innovation Center, which combines IT and culture technology. We conducted a case study on maker education(VR production project, electronic publishing, beads craft, leather craft, IoT) which was held from July 8 to August 30, 2017 five times. We conducted interviews with five preliminary makers who participated in all the courses of the education, and five instructors who acted as professional makers with pre- developed questionnaires. The results of the study were derived by applying the Thematic Analysis method after opening the contents of the interview. Based on the results of the study, we could suggest characteristics of Korean makers and future direction of maker education.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.24 no.10
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• pp.1325-1330
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• 2020

New-born babies who require special attention medically are admitted often to incubator. Incubators are well equipped to fulfill take care of infants, but they have to hospital and so expensive. This paper proposes a smart incubator that can solve the problem of convenience and cost aspect of these incubators. Developed incubator enables near-field monitoring using Arduino Uno as the main control device and Bluetooth communication. The environment in the incubator measures temperature and humidity using a DHT22 sensor and the sound using a P5510 microphone. If the temperature and humidity data set by the user are lower or higher than the reference value, it is designed to operate the heating pad using the controller or turn on the fan to allow air circulation. The measured values in the incubator are displayed in real time on the user's smartphone monitoring screen and are programmed using app inventor. Developed incubators can help take care of infants at low cost in the home.