• 스마트미디어저널
• /
• 제9권4호
• /
• pp.66-72
• /
• 2020

온라인 교육시장이 확대됨에 따라 다양한 교육용 콘텐츠들이 출시되어지고 이를 사용하는 사용자들의 사용성과 사용자환경이 반영될 수 있는 콘텐츠 개발 방법이 연구되고 있다. 시장의 양적 확대를 뒷받침할 콘텐츠의 질적 성장을 위해서는 새로이 개발되지는 콘텐츠의 개발 방향성 확보 시점에서 기존 출시 모형에 대한 빠른 분석이 매우 중요하다. 하지만 콘텐츠 개발과정에서 개발 목표 설정에 필요한 전형적 모델의 추출과정을 직관적으로 협의할 수 있는 툴의 부재로 제작시안을 기준으로 한 반복적 업무 회귀가 개발공정에 필요한 많은 인력과 시간을 낭비하게 한다. 통계를 이용한 자료원 검증툴은 개발 전 과정과 최종 개발 결과에 영향을 주는 프로토타입의 선정 시 협력 업무를 수행하는 단일기업 내 또는 다수의 기업 간 소통의 부재로 인한 성과 이원화 문제를 공정 간에 스크린해주는 긍정적 효익으로 작용할 수 있다. 본 연구는 시료가 충분치 않은 AR기반 교육용 콘텐츠의 개발과정에 적용할 후속 현장실험 적용 통계서비스모델을 설계하는 것으로써 유사 범주의 시료 확보를 통해 개발에 필요한 데이터를 확보하는 것이 적정하여 빅데이터를 이용한 자료의 취합과 의사결정이 프로세스를 기준으로 진행되었다. 이번 연구에서 제시되는 데이터 통계분석서비스 기본 모형은 직관적인 다차원 요인과 속성의 선택과 검출이 가능한 구조로 설계하였으며 후속 현장형 실험연구와 연계하여 조직 내 또는 다수 기업 간 협력활동에 조력이 가능한 온라인 기반 데이터 통계분석서비스로 제안하고자 한다.

• 한국기계가공학회지
• /
• 제19권8호
• /
• pp.43-49
• /
• 2020

The growth of the AR/VR market due to the advent of the 4th Industrial Revolution begins with the development of the display industry. The development of OLED and flexible displays is further accelerated by the development of R2R technology. Micro-processing technology using a fast tool servo (FTS), the core technology in R2R processes, is making technological progress in increasingly diverse ways. This paper proposes a method to develop an FTS for horizontal driving and presents this method through experiments and analyses. To develop a swing-type FTS based on a seesaw motion, a rotational moment hinge structure was designed for each type, and research was conducted to determine an effective design method. A cantilever-based swing-type FTS was developed in two variations: one with single-side hinges and another with dual-side hinges. The parameters in the design of the swing-type FTS are rotational moment, natural frequency, and material selection. In conclusion, an FTS with a single-side hinge demonstrates the high performance required for micro processing.

• 한국CDE학회논문집
• /
• 제17권6호
• /
• pp.417-425
• /
• 2012

In recent years, great attention has been paid to using simple physical objects as tangible objects to improve user interaction in augmented reality (AR) environments. In this paper, we address AR-based user interaction using tangible objects, which has been used as a key component for virtual design evaluation of engineered products including digital handheld products. We herein consider the use of two types (product-type and pointer-type) of tangible objects. The user creates input events by touching specified parts of the product-type object with the pointer-type object, and the virtual product reacts to the events by rendering its visual and auditory contents on the output devices. The product-type object is used to reflect the geometric shape of a product of interest and to determine its position and orientation in the AR environment. The pointer-type object is used to recognize the reference position of the pointer (or finger) in the same environment. The rapid prototype of the product is employed as a good alternative to the product-type object, but various alternatives to the pointer-type object can be considered according to fabrication process and touching mechanism. In this paper, we present four alternatives to the pointer-type object and investigate their strong and weak points by performing experimental comparison of their various aspects including interaction accuracy, task performance, and qualitative user experience.

• Journal of Advanced Marine Engineering and Technology
• /
• 제23권5호
• /
• pp.678-685
• /
• 1999

A UBET program is developed for determining flash the optimum sizes of preform and initial billet in plane-strain closed-die forging. The program consists of forward and backward tracing processes. In the forward program, flash, die filling and forging load are predicted. In backward tracing process the optimum dimensions of initial billet and preform are determined from the final-shape data based on flash design. Experiments are carried out with pure plasticine billets ar room temperature. The theoretical predictions of forging load and flow pattern are in good agree-ment with the experimental results.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2021년도 추계학술대회
• /
• pp.609-612
• /
• 2021

다양한 산업영역에 대하여 정부기관, 기업들은 디지털 트랜스포메이션 전략 수립 및 추진하고 있으며 성공적인 기술 혁신을 통한 4차 산업혁명시대를 선도하고 있다. 이런 변화의 시기에 디지털 트랜스포메이션의 성공사례로 글로벌 기업 나이키, 스타벅스의 이야기를 많이 접할 수 있다. 이 두 기업은 디지털 트랜스포메이션을 통하여 성공적인 결과를 보여 주고 있다. 국내 기업들 또한 모바일, 클라우드, IoT, 인공지능, AR·VR 기술을 기반으로 디지털 혁신을 진행하고 있으며 고효율 높은 생산성을 위한 RPA (Robotic Process Automation)프로세스를 구축 하고 있다. 본 논문에서는 건설 산업의 설계, 시공, 유지관리의 시공 전주기 데이터를 활용하여 3차원 디지털 트윈 공간 구축 자동화 프로세스 기법을 소개하고 앞으로 건설 산업영역의 디지털 트랜스포메이션 전략에 대하여 알아본다.

• International journal of advanced smart convergence
• /
• 제12권2호
• /
• pp.90-95
• /
• 2023

With the rapid development of deep learning and artificial intelligence, generative models have achieved remarkable success in the field of image generation. By combining the stable diffusion method with Web UI technology, a novel solution is provided for the application of AI painting generation. The application prospects of this technology are very broad and can be applied to multiple fields, such as digital art, concept design, game development, and more. Furthermore, the platform based on Web UI facilitates user operations, making the technology more easily applicable to practical scenarios. This paper introduces the basic principles of Stable Diffusion Web UI technology. This technique utilizes the stability of diffusion processes to improve the output quality of generative models. By gradually introducing noise during the generation process, the model can generate smoother and more coherent images. Additionally, the analysis of different model types and applications within Stable Diffusion Web UI provides creators with a more comprehensive understanding, offering valuable insights for fields such as artistic creation and design.

• 한국CDE학회논문집
• /
• 제4권1호
• /
• pp.60-68
• /
• 1999

In reverse engineering (RE) sustems, the quality of the data aquisition process is crucial to the accuracy of the reverse engineered three dimensional computer-aided design (CAD) model. However, these tasks are predominantly done manually, and little work has been done to improve the efficiency of scanning by determining the minimum number of scans and the optimal scanning directions. In this paper, new scanning and registration methods using tooling balls are developed to assist in determining the optimal parameter for these processes. When the object to scanned has no concavity, attaching path of the object and its bounding rectangle are used for optimal scanning and registration. Then minimum number of tooling balls and their positions are calculated automatically. In the case of concave parts, the scanning plan should include a complete scan of the concave area. With the surface normal vector and the scanning direction, the minimum degree of rotating the part can be calculated. But the maximum rotation should be restricted in order to prevent occlusion of the part. Finally tow sample part ar scanned based on the proposed methods and the results are discussed.

• 한국건설관리학회논문집
• /
• 제15권2호
• /
• pp.122-131
• /
• 2014

플랜트 시장이 성장함에 따라 발주자의 공기단축을 위한 품질, 기술에 대한 요구가 커져가고 있다. 다른 건설 프로젝트에 비하여 플랜트 프로젝트는 방대한 규모와 복잡한 공정으로 인하여 프로젝트 참여자간의 의사소통, 작업의 중복, 오류, 누락, 재시공 등의 문제가 발생하고 있다. 이를 방지하기 위해서는 참여자간 현장에서 부재, 장비, 공사에 관한 정보공유가 실시간으로 이루어져야 한다. 본 연구에서는 효율적인 배관공사관리를 위한 모바일 기반의 NFC, AR기술을 활용하여 프로세스 개선 및 시스템 구축하였다. 본 연구에서 개발된 프로세스 및 시스템은 현장에서 실시간적인 정보공유 및 전달이 이루어질 수 있는 환경 구축을 통하여 현장에서 보다 효율적인 공사관리가 이루어질 것으로 기대된다.

• 대한전기학회논문지:시스템및제어부문D
• /
• 제52권9호
• /
• pp.547-553
• /
• 2003

In this paper, we designed the PC-based analyzer of the power spectral density that could estimate the heart rate variability from time series data of R-R interval. The power spectral density estimated that it applied the autoregressive model to the measured electrocardiogram during a short period. Also, the characteristics of the designed analyzer are that it could process of the signal filtering, the generation and recomposition of time series and the feature extraction at the same time. Especially the analyzer reconstructed which applied the lowpass filter of the time series composed by the linear interpolation so as to enhance the signal-to-noise feature. We could estimate the power spectral density that confirmed a variety of power peak with low frequency range and high frequency rang of autonomic nerve by the heart rate variability.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2005년도 ICCAS
• /
• pp.262-264
• /
• 2005

We propose a filter design method to suppress the effect of gyroscope mixed random errors at INS system level. It is based on the result that mixed random errors can be represented by a single equivalent ARMA model. At first step, the time difference of equivalent ARMA process is performed, which consider the characteristic of indirect feedback Kalman filter used in INS filter. Next, a state space conversion of time differenced ARMA model is achieved. If the order of AR is greater than that of MA, the controllable or observable canonical form is used. Otherwise, we introduce the state equation of which the state variable is composed of the ARMA model output and several step ahead predicts of that. At final step, a complete form state equation is presented. The simulation results shows that the proposed method gives less transient error and better convergence compared to the conventional filter which assume the mixed random errors as white noise.