• 로봇학회논문지
• /
• 제16권4호
• /
• pp.299-305
• /
• 2021

In this study, the task of robotic tidy-up is to clean the current environment up exactly like a target image. To perform a tidy-up task using a robot, it is necessary to estimate the pose of various objects and to classify the objects. Pose estimation requires the CAD model of an object, but these models of most objects in daily life are not available. Therefore, this study proposes an algorithm that uses point cloud and PCA to estimate the pose of objects without the help of CAD models in cluttered environments. In addition, objects are usually detected using a deep learning-based object detection. However, this method has a limitation in that only the learned objects can be recognized, and it may take a long time to learn. This study proposes an image matching based on few-shot learning and Siamese network. It was shown from experiments that the proposed method can be effectively applied to the robotic tidy-up system, which showed a success rate of 85% in the tidy-up task.

• 디자인학연구
• /
• 제15권1호
• /
• pp.359-368
• /
• 2002

섬유예술은 현대 미술운동의 하나로 부각되었고, 그 중에서도 타피스트리는 인간의 역사와 함께 시작되어 지금가지 전시회와 다양한 형태를 통해 선보이고 있고 점점 깊이 연구되고 있다. 그러나 이 작업과정은 광대한 크기로 인해 시간적 육체적 노력이 엄청나게 요구된다. 현 상황은 샘플작업을 한 뒤 본 작업에 들어가는데 마무리 작업을 할 때까지 그 느낌을 잘 알 수 없기 때문에 완성단계에서도 마음에 들지 않으면 다시 작업을 하는 경우가 많이 있다. 이런 문제점을 보완하기 위해서 미리 컴퓨터를 통하여 확인 후 수정을 거쳐 결과물을 볼 수 있도록 하여 창작의 시간을 늘이고 불필요한 시간을 없애고자 시뮬레이션이 연구되었 다. 이 시뮬레이션의 주된 내용은 스캔, 드로잉, 라인 클린 업, 필업, 렌더링, 내역 조회의 과정을 거쳐 프린트 할 수 있도록 구성되었다. 내용은 스캔과 드로잉에서 아이디어 창출을 하고 라인 클린 업에서 벡터 이미지로 만든 다음 실의 느낌을 주고 수정을 한다. 이 이미지를 렌더링하고 실의 길이와 무게 가격 조회를 한 후 프린트하는 전과정을 시뮬레이션 하는 패키지 소프트웨어를 프로토타입으로 제작한 것이다. 이런 과정을 통해 타피스트리를 하는 여러 작가들과 학생들에게 보다 쉽게 접하고 미연에 불필요한 노력과 시간들을 줄일 수 있도록 연구 개발되었다.

• 한국실내디자인학회:학술대회논문집
• /
• 한국실내디자인학회 1999년도 춘계학술발표대회 논문집
• /
• pp.87-93
• /
• 1999

In the millenium, which will be characterized by its global culture, a strong sense of identity of one's culture is needed to nature one's culture in a way that more people can participate in creating, enjoying and consuming it. In order to respond to both globalization and localization, natural and cultural backgrounds of such should be considered in the conversation of nature, so that the optical and color environment can have local identity while undergoing sustainable development. Therefore, the objective of this research is to enhance the image of a city, which is endowed with beautiful scenery and unique culture, but has lost its identity since industrialization An through a scientific and systematic color planning The Research was conducted as follows. First, color environment which doesn't reflect local characteristics due to modernism which emphasizes on uniformity was examined. Second, standard and analysis of environment color planning were examined. Natural color specimen was use to make a palette of nature colors, from which colors for architecture were extracted to come up with color combination types. Without traditional architecture philosophy, materials and colors, which were once in harmony with the environment, it is impossible to clean up the environment all together. However by using colors to control new city plans, urban redevelpment, construction and renovation gradually, that process can be effective and less costly.

• 한국멀티미디어학회논문지
• /
• 제23권11호
• /
• pp.1349-1360
• /
• 2020

In recent years, Convolutional Neural Networks (CNNs) have been successfully implemented in different tasks of computer vision. Since CNN models are the representatives of supervised learning algorithms, they demand large amount of data in order to train the classifiers. Thus, obtaining data with correct labels is imperative to attain the state-of-the-art performance of the CNN models. However, labelling datasets is quite tedious and expensive process, therefore real-life datasets often exhibit incorrect labels. Although the issue of poorly labelled datasets has been studied before, we have noticed that the methods are very complex and hard to reproduce. Therefore, in this research work, we propose Deep CleanNet - a considerably simple system that achieves competitive results when compared to the existing methods. We use K-means clustering algorithm for selecting data with correct labels and train the new dataset using a deep CNN model. The technique achieves competitive results in both training and validation stages. We conducted experiments using MNIST database of handwritten digits with 50% corrupted labels and achieved up to 10 and 20% increase in training and validation sets accuracy scores, respectively.

• 정보처리학회논문지B
• /
• 제13B권4호
• /
• pp.369-376
• /
• 2006

디지탈 변환과 기기간의 전송 영향으로 화질이 떨어진 디지탈 영상의 복구는 잡음 발생 및 그 역 과정의 모형화를 통해 이루어낼 수 있다. 스캐너로 읽혀진 서류 영상이나 위성 사진에서 잡음 및 반점을 제거하는 과정이 좋은 예이다. 그러나 잡음 발생의 비선형성은 그 역 과정의 이론적 이해를 어렵게한다. 본 논문에서는 충격 잡음에의해 화질이 떨어진 이진 서류 영상의 복구 방법들을 심층 분석하는 것에 촛점을 맞추었다. 본 연구 결과에 의하면 이진 서류 영상의 잡음 제거 방식으로 '가중 중앙값' 여과기와 '리' 여과기가 다른 여과기에 비해 효과적임을 보여준다. 반면 '웨이브렛' 여과 방식은 타 방식보다 100여배의 시간이 소요되어 비효율적이다. 본 논문에서는 가중 중앙값 여과기에 쓰이는 가중치에 대한 연구 결과를 제시하였다.

• 농촌계획
• /
• 제21권2호
• /
• pp.163-175
• /
• 2015

This study aimed to analyze factors of importance and performance picked by customers of Bibijeong, a farm restaurant operated by the local community of Wanju-gun. Major points include: Recognition paths mostly were word of mouth and mass media, types of visit were in the company of friends, family members or work colleagues, and purposes of visit included consumption of meal and identifying features of the restaurant. Secondly, factor analysis showed that level of facility, atmosphere/cleanness, diversity of menu, employees, ingredients and network. The Cronbach Alpha coefficient was +0.6. Thirdly, average of importance of factors was 3.861 while average performance was 3.429. IPA analysis showed that employee(communication, customer contact) in the first quadrant proved the need for fast improvement through training. Atmosphere/cleanness (interior atmosphere, table clean, kitchen cleanliness, clean dishes, interion design) and employee(proficiency, menu recognition), foodstuff(freshness, origin, safety) in the second quadrant showed that the marketing strategy of improvement as well as maintaining current status is needed, including regular training and hygiene inspection. The third quadrant contains facilities(disability, baby, fire protection) and food menu(food packing, various menu, creative menu, menu description), network(village economic links), which showed the need for gradual improvement. The forth quadrant contains network(sights's near contains. The results so far can be summed into the statement that overcoming the basic functionality of providing meals and linking the restaurant with local attractions and local economy would be need, as well as building up the image of unique farm restaurant with local features, so that Bibijeong can serve as the centerpiece of community and foundation of exchange with other areas.

• 한국정밀공학회지
• /
• 제29권5호
• /
• pp.545-553
• /
• 2012

A Gimbal structure system in observation reconnaissance aircraft is made up of camera module and stabilization drive device supporting camera module. During flight for image recording, the aircraft undergoes serious accelerations with wide frequencies due to several factors. Though base excitation of stabilization drive device induces vibration of camera module, it must get the stable and clean images. To achieve this aim, acceleration of camera module must be reduced. Hence, vibration isolators were installed to stabilization drive device. Considering isolators and bearings in the stabilization drive device, vibration characteristics of gimbal structure system were analyzed by finite element method. For three translational direction, acceleration transmissibility of camera module was calculated by harmonic responses analysis in the frequency range of 5 ~ 500 Hz. In addition to, sine-sweep experiment were performed to prove correctness of present analysis.

• 청정기술
• /
• 제15권4호
• /
• pp.265-272
• /
• 2009

본 연구에서는 하수슬러지에서 만든 활성탄을 이용하여 벤젠에 대한 정지(static)흡착실험을 수행하였다. 7.999 kPa에 이르는 압력 범위 내에서 온도 조건을 변화시켜 가며 303.15, 318.15, 333.15 K에서 흡착실험을 진행하였다. 등온흡착곡선은 Langmuir isotherm, Freundlich isotherm, Toth isotherm을 적용하여 비교하였다. 벤젠의 흡착량(q)을 fitting한 결과 Langmuir isotherm과 Toth isotherm으로 fitting한 등온흡착 곡선의 정확도가 높은 것으로 나타났다. 그리고 Langmuir isotherm의 $q_{max}$ 값을 이용하여 흡착제의 흡착량을 비교하였다. 또한, 하수슬러지 활성탄과 상용활성탄의 세공 발달 여부를 비교하기 위해 SEM image를 관찰하였다. SEM image 관찰 결과, 국내외 상용활성탄(DARCO A.C., SPG-100 A.C.)이 하수슬러지 활성탄에 비해 세공발달 정도가 우수하며, 세공발달 정도가 우수한 국내외 상용활성탄(DARCO A.C., SPG-100 A.C.)이 하수슬러지 활성탄에 비해 벤젠흡착량(q)이 높은 것을 확인할 수 있었다. 그러나 실온조건인 303.15K에서 하수슬러지의 최대 벤젠흡착량($q_{max}$)은 국내 상용활성탄(SPG-100 A.C.)의 최대 벤젠흡착량($q_{max}$)과 대등한 수치로 나타났으므로 하수슬러지 활성탄의 상용화 가능성을 검증할 수 있었다.

• 한국지반환경공학회 논문집
• /
• 제10권6호
• /
• pp.49-60
• /
• 2009

본 연구는 기존의 낙석방지울타리에 적용되는 와이어로프를 경강선으로 대체하고 소재 및 체결부에 대한 실내성능실험과 더불어 현장에서의 수직낙하시험을 통해 전체적인 에너지 흡수능력을 평가하여 새로운 낙석방지울타리를 개발하는데 있다. 12단 경강선 적용 낙석방지울타리의 수직낙하시험 결과, 국내 낙석방지울타리에 기준으로 적용되는 흡수에너지인 50kJ 이상의 에너지를 흡수하는 것으로 나타났다. 또한 경강선 단수가 12단에서 16단으로 증가함에 따라 에너지 흡수능력도 향상되었다. 이러한 새로운 낙석방지울타리를 도로공사 절취사면 현장에 성공적으로 적용하였다. 그 결과, 시공성은 기존에 비해 별차이가 없는 것으로 나타났으나 미관상 전체적으로 심플하고 깨끗한 이미지를 연출할 수 있었다. 경제성 분석결과에 있어서는 전체 건설비용에 있어 기존 대비 약 20% 정도 절감되는 것으로 나타났다.

• Journal of Acupuncture Research
• /
• 제31권1호
• /
• pp.75-93
• /
• 2014

Objectives : This study was designed to establish medical trust realization system by finding factors influential to it using questionnaire. Methods : 277 subjects were participated in this study. After a treatment, we conducted a survey from April 1st to October 31th about medical service perception index, medical trust index, patient satisfaction index, patient reliability index, patient flow degree index, recall intension index, and hospital image index. To evaluate the influence of medical service perception with other 6 indexes, we statistically made regression analysis of the results through the survey. Results : By the results of the analysis, evaluation of hospital image influenced all 6 indexes. The systemicity of treatment process had an effect on 5 indexes except for the flow degree of patients. The humanity of medical team brought out the estimation of 4 indexes except for the patient flow degree and hospital image. The empathic ability of doctor and appropriacy of medical costs hold the next rank influencing 3 indexes. It reached the conclusion that the systemicity of medical team tend to determine the medical trust and patient reliability. The expertise, professional skill of doctor, the fault, commercial application, fame of medical team, the speed of treatment process, the newest and clean medical facility affected each one index. Conclusions : Korean medicine should find a way to consider the mind of patients for improving the medical quality through trust realization system, keeping up with times. As a result of this research, we can find out important causes which influence the trustful medical system. From now on, we should apply this result to actual treatment of psychology customized system. Also, more simple and clear questionnaire was organized through this research, it can be used to forward research to apprehend patient mentality more conveniently.