• Ocean Systems Engineering
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• v.4 no.4
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• pp.263-278
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• 2014

The spudcan requires the suitable design considering the soil, platform, and environmental conditions. Its shape needs to be designed to secure sufficient reaction of soil so that it can prevent overturning accidents. Its shape also has to minimize the installation and extraction time. Even in the same soil condition, the reaction of soil may be different depending on the shape of spud can, mainly the slope of top and bottom plates. Therefore, in this study, the relation between the slope of plates and the reaction of soil with and without water jetting is analyzed to better understand their interactions and correlations. For the investigation, a wind turbine installation jack-up rig (WTIJ) is selected as the target platform and the Gulf of Mexico is considered as the target site. A multi layered (sand overlying two clays) soil profile is applied as the assumed soil condition and the soil-structure interaction (SSI) analysis is performed by using ANSYS to analyze the effect of the slope change of the bottom plate and water jetting on the reaction of soil. This kind of investigation and simulation is needed to develop optimal and smart spudcan with water-jetting control in the future.

• Journal of Korea Society of Industrial Information Systems
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• v.12 no.1
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• pp.72-79
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• 2007

This paper will analysis the Jam-O-Drum developed for collaborative musical experience at first. And we suggest the multi-user interactive game system Kom-O-Drum(Korean Jam-O-Drum) as a Serious Game Platform By combining velocity, direction and touch sensitive input devices like a korea traditional drum "Jang Go" and computer graphics imagery into an LCD or PDP display up to four simultaneous players are able to participate in a collaborative approach to game's mission. Also we introduce the design of detail input device and application fields of Kom-O-Drum for Serious Game.

• Journal of Korea Society of Digital Industry and Information Management
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• v.10 no.2
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• pp.13-20
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• 2014

In this paper, we implemented the object scanning with nxtOSEK which is an open source platform. nxtOSEK consists of device driver of leJOS NXJ C/Assembly source code, TOPPERS/ATK(Automotive real time Kernel) and TOPPERS/JSP Real-Time Operating System source code that includes ARM7 specific porting part, and glue code make them work together. nxtOSEK can provide ANSI C by using GCC tool chain and C API and apply for real-time multi tasking features. We experimented the 3D scanning with ultra sonic and laser sensor which are made directly by laser module diode and experimented the measurement of scanning the object by knowing x, y, and z coordinates for every points that it scans. In this paper, the laser module is the dimension of $6{\times}10[mm]$ requiring 5volts/5[mW], and used the laser light of wavelength in the 650[nm] range. For detecting the object, we used the beacon detection algorithm and as the laser light swept the objects, the photodiode monitored the ambient light at interval of 10[ms] which is called a real time. We communicated the 3D scanning platform via bluetooth protocol with host platform and the results are displayed via DPlot graphic tool. And therefore we enhanced the functionality of the 3D scanner for identifying the image scanning with laser sensor modules compared to ultra sonic sensor.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2009.11a
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• pp.285-289
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• 2009

본 논문에서는 현재 비디오 코덱 표준인 H.264/AVC 에서 사용하고 있는 정수형 변환을 두 번 사용하는 다차원 변환 즉, MDT(Multi-Dimensional Transform) 을 제안한다. 제안하는 알고리듬은 H.264/AVC 7가지 인터 모드중에서 $16{\times}16$, $8{\times}16$, $16{\times}8$블록 모드에 적용된다. H.264/AVC에서 사용하는 정수형 변환을 $4{\times}4$블록 단위로 적용하고 인접하는 4개의 $4{\times}4$블록으로부터 같은 주파수 위치의 계수값을 모아서 16개의 $4{\times}1$벡터 변환을 추가로 수행하는 방법이다. MDT를 수행함으로써 H.264/AVC 표준에서 사용되는 변환이 가지는 예측오차를 유지하면서 공간적 중복도를 추가로 줄일 수 있다. MDT 된 계수들을 정수형으로 양자화하고 양자화된 계수값을 효율적으로 주사하는 방법을 제안하여 압축효율을 높였다. 제안된 알고리듬의 제안하는 MDT 기반 방법은 H.264/AVC High profile 표준보다 평균 3.00%의 비트 절감을 보였다.

• Journal of Digital Contents Society
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• v.10 no.4
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• pp.605-614
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• 2009

The software-defined radio (SDR) is a radio communication technology that can reconfigure necessary application software on a common hardware platform to deal with several kind of radio communication environment. It is necessary for a system that can control and analyze functionalities of a system in order to verify the SCA-based reconfigurable middleware platform, SCARLET that implements the SDR technology. In this paper, we propose and implement the architecture of the waveform manager that is connected with SCARLET and performs management and control functionalities. We verify the performance of the waveform manager by testing each functionality of the overall system that uses the SCARLET middleware platform.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.50-53
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• 2016

Image processing techniques play an increasingly important role in many aspects of our daily life. For example, it has been shown to improve agricultural productivity in a number of ways such as plant pest detecting or fruit grading. However, massive quantities of images generated in real-time through multi-devices such as remote sensors during monitoring plant growth lead to the challenges of big data. Meanwhile, most current image processing systems are designed for small-scale and local computation, and they do not scale well to handle big data problems with their large requirements for computational resources and storage. In this paper, we have proposed an IPABigData (Image Processing Algorithm BigData) platform which provides algorithms to support large-scale image processing in agriculture based on Hadoop framework. Hadoop provides a parallel computation model MapReduce and Hadoop distributed file system (HDFS) module. It can also handle parallel pipelines, which are frequently used in image processing. In our experiment, we show that our platform outperforms traditional system in a scenario of image segmentation.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.23 no.5
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• pp.438-444
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• 2013

This paper presents the replication of a desired vibration response by iterative learning control (ILC) system for a vibration motion replication actuator. The vibration motion replication actuator has parameter uncertainties including system nonlinearity and joint nonlinearity. Vehicle manufacturers worldwide are increasingly relying on road simulation facilities that put simulated loads and stresses on vehicles and subassemblies in order to reduce development time. Road simulation algorithm is the key point of developing road simulation system. With the rapid progress of digital signal processing technology, more complex control algorithms including iterative learning control can be utilized. In this paper, ILC algorithm was utilized to produce simultaneously the six channels of desired responses using the Stewart platform composed of six linear electro-magnetic actuators with Halbach magnet array. The convergence rate and accuracy showed reasonable results to meet the requirement. It shows that the algorithm is acceptable to replicate multi-channel vibration responses.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.516-517
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• 2014

This research has implemented the new game to develop the platform driving type that we contact frequently in mobile game market. We produced the prototype, 'Milky Wavy', for it. This game conduct to avoid the hole in the bottom in map that it splits or rotates, gain the coin, and take points. This game is controled to many characters in both hands. We focus to play that many balls can be moved simultaneously in the consideration of the principle physical laws. This research suggests the method to manufacture multi-driving platform game to control many characters at the same time.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.846-847
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• 2016

LED lighting is energy in lighting control based on had developed into a human-centered / multi-functional lighting systems from simple one trillion people thereby using environmental change by combining IT technology and software, including a variety of sensor functions and communication functions, depending on the evolution of the IT Convergence Era the reduction, and the strength and the color tone customized illumination of the user-section of light has been desired. For this intelligent lighting system is applied to the sensor and the control center of the user should be possible, and it is necessary for this artist platform of the communication module. In this paper, we propose a communication platform that utilizes Bluetooth BLE module for LED lighting control.

• Journal of Korea Society of Digital Industry and Information Management
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• v.15 no.3
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• pp.1-14
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• 2019

The 4th Industrial Revolution, intelligent automobile application technology is evolving beyond the limit of the mobile device to a variety of application software and multi-media collective technology with big data-based AI(artificial intelligence) technology. with the recent commercialization of 5G mobile communication service, artificial intelligent automobile technology, which is a fusion of automobile and IT technology, is evolving into more intelligent automobile service technology, and each multimedia platform service and application developed in such distributed environment is being developed Accordingly, application software technology developed with a single system SoC of a portable terminal device through various service technologies is absolutely required. In this paper, smart device design for ontology design of intelligent automobile open platform enables to design intelligent automobile middleware software design technology such as Android based SVC Codec and real time video and graphics processing that is not expressed in single ASIC application software technology as SoC based application designWe have experimented in smart device environment through researches, and newly designed service functions of various terminal devices provided as open platforms and application solutions in SoC environment and applied standardized interface analysis technique and proved this experiment.