• Journal of Korea Game Society
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• v.16 no.3
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• pp.87-96
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• 2016

As use of Internet increase, IoT(Internet Of Things), a interaction between connected devices, is widely used throughout industrial area. In this paper, we discussed what to consider when planning framework for contents using user's mobile devices and various sensors in IoT environment and suggest related techniques. Also, using the techniques suggested in this paper, we showed the prototype of the framework. Finally, we showed the possibility of games in the IoT environment by creating game in the IoT environment.

• Current Optics and Photonics
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• v.1 no.2
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• pp.90-94
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• 2017

Visible light identification (VLID) is a user identification system for a door lock application using smartphone that adopts visible light communication (VLC) technology with the objective of high security, small form factor, and cost effectiveness. The user is verified by the identification application program of a smartphone via fingerprint recognition or password entry. If the authentication succeeds, the corresponding encoded visible light signals are transmitted by a light emitting diode (LED) camera flash. Then, only a small size and low cost photodiode as an outdoor interface converts the light signal to the digital data along with a comparator, and runs the authentication process, and releases the lock. VLID can utilize powerful state-of-the-art hardware and software of smartphones. Furthermore, the door lock system is allowed to be easily upgraded with advanced technologies without its modification and replacement. It can be upgraded by just update the software of smartphone application or replacing the smartphone with the latest one. Additionally, wireless connection between a smartphone and a smart home hub is established automatically via Bluetooth for updating the password and controlling the home devices. In this paper, we demonstrate a prototype VLID door lock system that is built up with LEGO blocks, a photodiode, a comparator circuit, Bluetooth module, and FPGA board.

• Journal of Digital Convergence
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• v.9 no.6
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• pp.389-397
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• 2011

With the growing acceptance of the educational benefits for the use of robot- based teaching, their use in classrooms is increasing. However, the vast majority of studies taking place are based within normal classroom environment. Therefore, this study was focused on the adaptations that need to be made for the use of robot-based teaching within a special-needs environment, specifically a program for pre-service teachers of a special needs Elementary school. The results indicate robot-based teaching has a place within special education and it is hoped that this study will spur further investigation into the field.

• The Journal of Society for e-Business Studies
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• v.2 no.2
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• pp.89-113
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• 1997

Modeling methodology has been widely used for analysis and design of a information system. Specially, under the CALS environments, modeling approach is more important because the enterprise functions are inter-related and information sharing speeds up the business. In this paper, we suggest functional requirements about modeling methodology for CALS by surveying the IDEF0 and ARIS. The former is FIPS 183 and the latter is basic methodology of SAP/R3 which is world-wide ERP system. The proposed functional requirements include all semantics of IDEF0 and adds some features. The first is adding modeling components which are semantic representations. In addition to ICOMs, we add the time and cost component which is required to execute the function. The second is tracing mechanism. When we need some information, we drive the functions related with the information by reverse tracing of the function which produces the information as a output and input. Through the tracing, we find out the bottleneck process or high cost process. This approach guarantees the integrity of data by designating the data ownership. Finally, we suggest the final decomposition level. We call the final decomposed function into unit function which has only one output data. We can combine and reconstruct some of functions such as 'lego block' combination.

• The Mathematical Education
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• v.53 no.3
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• pp.413-434
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• 2014

Logic lays the foundation of Mathematics and the development of Mathematics is dependent on critical thinking. So it is important that school mathematics helps students develop their logical and critical thinking ability for both mathematics learning and problem solving in general. MINDSTORMS, a LEGO based programming activity kit, is an effective teaching and learning tool that can be used to enhance logical and critical thinking in students. This study focused on measuring the growth of students' ability to think logically and critically when they used MINDSTORMS activities to learn programming. In addition, we investigated how the students' logical and critical thinking changed from the MINDSTORMS learning experience. The study confirmed that the programming activities using MINDSTORMS help to enhance logical and critical thinking in students. The students attitude about logical and critical thinking became more positive and the activities helped to engage students to think logically and critically. This type of programming activities should be valuable in mathematics education and it should be included in a general mathematics curriculum.

• The Journal of Korean Association of Computer Education
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• v.10 no.6
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• pp.19-27
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• 2007

To help programming learning, we have designed a robot programming course that improves complex cognitive abilities. The developed course was implemented in college programming classes and educational effects were analysed. While students are learning through LEGO Mindstorms NXT and NXT-G software, the students' problem solving abilities have been enhanced. The developed robot programming course gives positive effects on learners' problem solving abilities. It means that the developed course helps a learner in a cognitive domain.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.599-600
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• 2006

본 연구는 솔더의 리프로우 현상으로부터 제안되었다. 솔더는 원형 흡착 층 위에서 녹게 되면 단위 면적당 표면 에너지를 최소화 하려는 특성 때문에 구형이 되는데, 이는 자기정렬 기구의 핵심이기도 하다. 본 연구에서 제안되는 새로운 설계가 기존의 설계와 가장 큰 차이점은 그림 1에서 처럼 솔더의 리프로우에 의해 측면 접합을 한다는 것이다. 대부분의 기존 실장 기술은 접합 면과 피 접합 면이 서로 마주보고 있으며 서로 맞닿아야만 접합이 이루어 지는 "intimate contact" 원리인 반면, 본 연구에서 제안된 개념은 접합 면과 피 접합 면이 쏠더에 의해 끼워진 상태에서 측면 접합되는 원리이 기 때문에 접합 면끼리 서로 인접하지 않아도 접 합은 자연적으로 완성되어 접합면의 표면상태에 충분히 둔감하다는 장점을 가질 수 있다. 그림 1의 (b)는 개념도 (a)를 구현하기 위한 제작 공정을 보여준다. 버섯 모양의 구조물을 형성하는 공정과 측벽에 UBM을 선택적으로 형성하는 공정이 핵심 공정이며 이외의 접합 공정은 기존의 방법과 달리 매우 간단하게 완성시킬 수 있다. 본 논문에서는 기본적으로 제안된 방법으로 구현되는 실장결과와 그 기본적인 기계적 강도, 기밀 특성을 살펴 보았다. 그리고 RF 소자의 실장에 있어서 제안된 방법에 의한 전기적 연결의 기초 결과에 대해서 논의한다.

• Industrial Engineering and Management Systems
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• v.11 no.3
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• pp.266-275
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• 2012

The rise of crowdsourcing and web 2.0 opens plenty of opportunities for companies who want to exploit external sources of ideas for internal innovation. Utilization of crowdsourcing for product design and development has been attracting the attention of both enterprises and researchers. Many cases of implementation of crowdsourcing for product design and development such as: Threadless, FIAT Mio, Lego online Factory, etc., have made crowdsourcing a promising alternative source of innovative power. Although crowdsourcing gained access due to improved Internet access and web 2.0, it is little understood how the crowd, with respect to participation, behaves for any crowdsourcing project. To investigate this, we conducted an experiment on a real crowd of engineering related individuals to figure out the crowd participation pattern for various product design and development phases of a new product development project. The experiment results give a quantitative view of the participation of the crowd (i.e., crowd participation pattern) in various phases of a product design and development process that utilizes crowdsourcing, provide a practical guidance for companies to harness the power of the crowd sensibly, and provide experimental data for further research in this field.

• The KIPS Transactions:PartD
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• v.11D no.2
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• pp.453-460
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• 2004

In this thesis, remote conveyor control and monitoring system is designed and Implemented for shoes production process based on Lego prototyping mechanism by using the I/O interface control board for the ISA Interface control board. A conveyor server for real time profess control is implemented based on RTLinux(Real-Time Linux) so that users deride priority of work. And device driver is implemented bated on the RTLinux. Through this system, real-time Client/server monitoring environments Is implemented and tested. And the JMF(Java Media Framework) based monitoring system was implemented and the total processing status war monitored.

• Journal of Korea Multimedia Society
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• v.10 no.9
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• pp.1175-1184
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• 2007

Brick toys, once regarded as one of the most basic formative equipments, have succeeded in increasing user base and more experiments have been made to link with a variety of areas in a creative way. However, previous studies on brick were limited to its role as a tool of play and education, which resulted in relatively less number of studies on endless possibility and variability. In this regard, this study examined what made bricks evolve in the unique and advanced form and how it has developed in detail. This study presented information on the basis of theories regarding fundamental features and characteristics of brick and analyzes actual cases in a systematic way. Finally, VR design based on 3D-brick system was implemented.