• 제목/요약/키워드: Remote Practice

검색결과 96건 처리시간 0.037초

Position Control of Wafer Lift Pin for the Reduction of Wafer Slip in Semiconductor Process Chamber

  • Koo, Yoon Sung;Song, Wan Soo;Park, Byeong Gyu;Ahn, Min Gyu;Hong, Sang Jeen
    • 반도체디스플레이기술학회지
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    • 제19권4호
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    • pp.18-21
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    • 2020
  • Undetected wafer slip during the lift pin-down motion in semiconductor equipment may affect the center to edge variation, wafer warpage, and pattern misalignment in plasma equipment. Direct measuring of the amount of wafer slip inside the plasma process chamber is not feasible because of the hardware space limitation inside the plasma chamber. In this paper, we demonstrated a practice for the wafer lift pin-up and down motions with respect to the gear ratio, operating voltage, and pulse width modulation to maintain accurate wafer position using remote control linear servo motor with an experimentally designed chamber mockup. We noticed that the pin moving velocity and gear ratio are the most influencing parameters to be control, and the step-wised position control algorithm showed the most suitable for the reduction of wafer slip.

The Earthquake Case Study and Disasters Information System Based on the GIS

  • Ding, X.;WANG, X.Q.
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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    • pp.1067-1069
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    • 2003
  • The Earthquake Case Study and Disasters Information System based on GIS (MapECDIS 2002 for Windows), sponsored by Science and Technique Ministry of CHINA, is a GIS system developed to provide a tool for the government and the public to query and comprehend the disaster information (since 2221BC) and case study results (since 1966) of destructive earthquakes occurred in China. The system is expected to be useful for the earthquake forecast practice, the seismology research and earthquake disasters research as an applied assistant tool. The design idea and main functions of the system are introduced in the paper.

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스마트 온실 통합 모니터링 시스템 구축 (Implement of Web-based Remote Monitoring System of Smart Greenhouse)

  • 김동억;박노복;홍순중;강동현;우영회;이종원;안율균;한신희
    • 현장농수산연구지
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    • 제24권4호
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    • pp.53-61
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    • 2022
  • 적절한 기후와 토양 조건을 조성하여 제어되는 온실에서 농작물을 재배하는 것은 중요한 연구 및 적용 과제가 되어왔다. 온실의 적절한 환경 조건은 최적의 식물 성장, 작물 수확량 향상을 위해 필요하다. 본 연구는 온도센서, 토양 센서, 작물 센서, 카메라 등 각종 센서와 장비를 연결하는 온실 IT기술을 적용하여 농작물 재배 환경과 생육 상태를 실시간으로 모니터링하는 웹 기반 원격 모니터링 시스템 구축을 목적으로 하였다. 측정항목은 기온, 상대습도, 일사량, CO2 농도, 양액 EC, pH, 배지온도, 배지 EC, 배지 수분함량, 수액 흐름, 줄기 직경, 과실 직경 등이다. 개발된 온실 모니터링 시스템은 네트워크 시스템, 센서가 부착된 데이터 수집 장치, 카메라로 구성되었다. 원격 모니터링 시스템은 서버/클라이언트 환경에서 구현되었다. 온실 환경 및 작물에 대한 정보는 데이터베이스에 저장된다. 저장된 정보 중 성장 및 환경에 대한 항목을 추출 비교하고 분석할 수 있다. 스마트 온실을 위한 통합 모니터링 시스템은 스마트 온실 관리를 위한 환경 및 작물성장을 이해하고 응용 실무에 사용될 것이다.

Classification of Crop Lands over Northern Mongolia Using Multi-Temporal Landsat TM Data

  • Ganbaatar, Gerelmaa;Lee, Kyu-Sung
    • 대한원격탐사학회지
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    • 제29권6호
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    • pp.611-619
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    • 2013
  • Although the need of crop production has increased in Mongolia, crop cultivation is very limited because of the harsh climatic and topographic conditions. Crop lands are sparsely distributed with relatively small sizes and, therefore, it is difficult to survey the exact area of crop lands. The study aimed to find an easy and effective way of accurate classification to map crop lands in Mongolia using satellite images. To classify the crop lands over the study area in northern Mongolia, four classifications were carried out by using 1) Thematic Mapper (TM) image August 23, 2) TM image of July 6, 3) combined 12 bands of TM images of July and August, and 4) both TM images of July and August by layered classification. Wheat and potato are the major crop types and they show relatively high variation in crop conditions between July and August. On the other hands, other land cover types (forest, riparian vegetation, grassland, water and bare soil) do not show such difference between July and August. The results of four classifications clearly show that the use of multi-temporal images is essential to accurately classify the crop lands. The layered classification method, in which each class is separated by a subset of TM images, shows the highest classification accuracy (93.7%) of the crop lands. The classification accuracies are lower when we use only a single TM image of either July or August. Because of the different planting practice of potato and the growth condition of wheat, the spectral characteristics of potato and wheat cannot be fully separated from other cover types with TM image of either July or August. Further refinements on the spatial characteristics of existing crop lands may enhance the crop mapping method in Mongolia.

원격의료 서비스의 쟁점사항에 관한 연구 (A Study on Telemedicine Service Issues)

  • 정용규;김장일;권준철;최영진
    • 서비스연구
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    • 제4권2호
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    • pp.57-67
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    • 2014
  • 원격의료도 의료행위이므로, 의료인이 행하지 않으면 보건위생상 위해가 생길 우려가 있기에, 의료인만이 할 수 있도록 법률로 제한되어 있다. 반면 원격의료도 존귀한 사람의 생명과 신체를 다루는 일이므로, 작은 실수를 수반하는 원격의료일지라도 그 피해가 영원히 회복할 수 없거나 회복하기 어려울 수도 있다. 그러므로 기초의학부터 시작하여 체계적으로 의학을 공부하고, 인간의 신체 및 생명에 대한 외경심을 체계적으로 교육을 받았을 뿐만 아니라 상당기간 임상실습을 한 후 국가의 검증을 거친 의료인에 한하여 원격의료행위를 허용할 수 있다. 환자 및 정보가 먼 거리로 떨어져 있거나 시간적으로 많은 차이가 발생하는 등 여러 가지 문제로 인해 도달할 수 없는 경우 의료정보 및 전문적 조언을 원격으로 제공하는 시스템으로, 환자 진료뿐만 아니라 의료행정, 의학교육, 자문과 의뢰 등을 포함하는 포괄적인 개념으로 쓰인다. 이러한 측면에서 의료산업의 발전을 위하여 규제에 대한 다양한 의견을 언급하고 쟁점사항을 정리해보았다.

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산업 자동화 교육훈련을 위한 웹기반 PLC 실험실의 설계 및 구현 (Design and Implementation of Web-based PLC Laboratory for Industrial Automation Training)

  • 한얼;박성무;홍상은
    • 한국산학기술학회논문지
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    • 제11권1호
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    • pp.101-106
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    • 2010
  • 인터넷기술의 눈부신 발전으로, 대학 및 교육기관에서는 인터넷을 통하여 많은 e-learning 강좌를 제공하고 있어 시간과 거리상 제약을 받고 있는 많은 학생들에게 혜택을 주고 있다. 그럼에도 불구하고, 대부분의 웹기반 강좌는 공학기술교육의 필요성을 충족시킬 수 없었다. 본 논문에서는 산업 자동화 교육 훈련을 위한 웹기반 PLC 실험실의 설계와 구현을 제안하였다. 제안된 웹기반 PLC 실험실 시스템은 가상실험실과 원격실험실로 구성하였다. 웹기반 PLC 실험실은 많은 추가 비용 없이 교육의 질을 높이면서 등록된 학생들이 집에서 접속이 가능하다. 학생들은 웹 카메라의 도움으로 인터넷을 통하여 실제와 같은 PLC 실험을 보다 잘 경험 할 수 있다.

극단화소를 이용한 Hyperion 데이터의 노이즈 밴드제거 (The Removal of Noisy Bands for Hyperion Data using Extrema)

  • 한동엽;김대성;김용일
    • 대한원격탐사학회지
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    • 제22권4호
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    • pp.275-284
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    • 2006
  • Hyperion 영상의 노이즈는 주로 대기 효과와 센서의 기계오류, 신호변환 때문이다. 보정되지 않은 밴드, 중복 밴드, 모든 대기흡수에 영향을 많이 받는 밴드가 모두 제거되어도, 여전히 노이즈 밴드가 존재한다. 영상처리에 사용할 선명하고 안정된 밴드를 선택하기 위해 육안으로 영상을 간단하게 검사할 수 있지만, 이는 수동으로 이루어지는 비효율적이고 주관적인 방법이다 본 논문에서 우리는 노이즈 추정과 자동 밴드 선택을 위해 극단화소비 사용을 제안한다. 이를 위해 기존에 사용되던 SNR, 엔트로피와 극단화소비를 비교하였다. 첫째, 상대적으로 노이즈가 적은 ALI 영상에 Gaussian 노이즈, salt & pepper 노이즈, Speckle 노이즈를 부가하여 노이즈량과 각 통계량 사이의 관계를 살펴보았다. 둘째, Hyperion 영상에서 추출된 세 개 통계량에 대해 기대최대화 분석을 수행하여 자동으로 밴드를 선택하였다. Hyperion 데이터는 시각적 평가에 의해 5단계로 구분되어 평가자료로 사용되었다. 실험 결과에서 극단화소비가 Hyperion 영상의 밴드 선택에 효과적으로 사용될 수 있었다.

Case Study: Cost-effective Weed Patch Detection by Multi-Spectral Camera Mounted on Unmanned Aerial Vehicle in the Buckwheat Field

  • Kim, Dong-Wook;Kim, Yoonha;Kim, Kyung-Hwan;Kim, Hak-Jin;Chung, Yong Suk
    • 한국작물학회지
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    • 제64권2호
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    • pp.159-164
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    • 2019
  • Weed control is a crucial practice not only in organic farming, but also in modern agriculture because it can lead to loss in crop yield. In general, weed is distributed in patches heterogeneously in the field. These patches vary in size, shape, and density. Thus, it would be efficient if chemicals are sprayed on these patches rather than spraying uniformly in the field, which can pollute the environment and be cost prohibitive. In this sense, weed detection could be beneficial for sustainable agriculture. Studies have been conducted to detect weed patches in the field using remote sensing technologies, which can be classified into a method using image segmentation based on morphology and a method with vegetative indices based on the wavelength of light. In this study, the latter methodology has been used to detect the weed patches. As a result, it was found that the vegetative indices were easier to operate as it did not need any sophisticated algorithm for differentiating weeds from crop and soil as compared to the former method. Consequently, we demonstrated that the current method of using vegetative index is accurate enough to detect weed patches, and will be useful for farmers to control weeds with minimal use of chemicals and in a more precise manner.

A Comparative Analysis of Research Trends in the Information and Communication Technology Field of South and North Korea Using Data Mining

  • Jiwan Kim;Hyunkyoo Choi;Jeonghoon Mo
    • Journal of Information Science Theory and Practice
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    • 제11권1호
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    • pp.14-30
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    • 2023
  • The purpose of this study is to compare research trends in the information and communication technology (ICT) field between North and South Korea and analyze the differences by using data mining. Frequency analysis, clustering, and network analysis were performed using keywords from seven South Korean and two North Korean ICT academic journals published for five years (2015-2019). In the case of South Korea (S. Korea), the frequency of research on image processing and wireless communication was high at 16.7% and 16.3%, respectively. North Korea (N. Korea) had a high frequency of research, in the order of 18.2% for image processing, 16.9% for computer/Internet applications/security, and 16.4% for industrial technology. N. Korea's natural language processing (NLP) sector was 11.9%, far higher than S. Korea's 0.7 percent. Student education is a unique subject that is not clustered in S. Korea. In order to promote exchanges between the two Koreas in the ICT field, the following specific policies are proposed. Joint research will be easily possible in the image processing sector, with the highest research rate in both Koreas. Technical cooperation of medical images is required. If S. Korea's high-quality image source is provided free of charge to N. Korea, research materials can be enriched. In the field of NLP, it calls for proposing exchanges such as holding a Korean language information conference, developing a Korean computer operating system. The field of student education encourages support for remote education contents and management know-how, as well as joint research on student remote evaluation.

The radiation shielding proficiency and hyperspectral-based spatial distribution of lateritic terrain mapping in Irikkur block, Kannur, Kerala

  • S. Arivazhagan;K.A. Naseer;K.A. Mahmoud;N.K. Libeesh;K.V. Arun Kumar;K.ChV. Naga Kumar;M.I. Sayyed;Mohammed S. Alqahtani;E. El Shiekh;Mayeen Uddin Khandaker
    • Nuclear Engineering and Technology
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    • 제55권9호
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    • pp.3268-3276
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    • 2023
  • The practice of identifying the potential zones for mineral exploration in a speedy and low-cost method includes the use of satellite imagery analysis as a part of remote sensing techniques. It is challenging to explore the iron mineralization of a region through conventional methods which are a time-consuming process. The current study utilizes the Hyperion satellite imagery for mapping the iron mineralization and associated geological features in the Irikkur region, Kannur, Kerala. Along with the remote sensing results, the field study and laboratory-based analysis were conducted to retrieve the ground truth point and geochemical proportion to verify the iron ore mineralization. The MC simulation showed for shielding properties indicate an increase in the linear attenuation coefficient with raising the Fe2O3+SiO2 concentrations in the investigated rocks where it is varied at 0.662 MeV in the range 0.190 cm-1 - 0.222 cm-1 with rising the Fe2O3+SiO2 content from 57.86 wt% to 71.15 wt%. The analysis also revealed that when the γ-ray energy increased from 0.221 MeV to 2.506 MeV, sample 1 had the largest linear attenuation coefficient, ranging from 9.33 cm1 to 0.12 cm-1. Charnockite rocks were found to have exceptional shielding qualities, making them an excellent natural choice for radiation shielding applications.