• Title/Summary/Keyword: 이동 거리

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리그 경기를 위한 일정계획 모형 개발

  • 김철수
    • Korean Management Science Review
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    • v.3
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    • pp.25-36
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    • 1986
  • 본 연구에서는 리그경기의 요구조건을 분석한 후, 리그경기 일정계획을 위한 모형을 개발하였다. 개발된 모형을 마이크로컴퓨터를 통해 이용자가 사용하기에 간편하도록 구현화했다. 본 연구에서 개발된 리그경기 일정계획 시스템은 각종 리그경기, 특히 연고지를 가진 상업적인 리그경기의 일정계획에 이용될 수 있다. 참가하는 팀들의 요구조건을 적극 반영할 수 있도록 민감도 분석기능을 추가시켰다. 개발된 시스템을 이용할 경우 현재 수작업으로 수행중인 리그경기 일정계획에 많은 도움이 있을 것으로 사료된다. 개발된 시스템에서는 각팀의 이동거리가 비교적 우선순위가 낮은 요구조건으로 분석되었으며 이동거리르 최소화시키는 방법으로 연속 홈경기와 방문경기를 적정수준 이하로 유지시키면서 각팀의 이동거리를 합한 총거리를 최소화하는 방법을 사용했으나 각팀의 실제적인 이동거리가 Critical한 경우에는 Multi-Objective Traveling Salesman기법을 사용하여 향후에 해결이 가능할 것으로 여겨진다.

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Movement of falling spheres in open-channel flow (개수로 흐름에서 구체의 침강이동)

  • Park, Ho Kook;Park, Sang Deog;Yoon, Min Woo;An, Khe Sok
    • Proceedings of the Korea Water Resources Association Conference
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    • pp.252-256
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    • 2018
  • 호우 시 산지하천 유역에서 빈발하는 토석류에 따라 하천 흐름에 들어온 전석과 같이 상대적으로 큰 물체는 하류로 이송되거나 하상에 퇴적하여 기존 흐름과 하상을 변화시키는 교란요인이 된다. 따라서 산지하천 흐름에서 전석의 영향을 예측하는 것이 필요하나 이는 유속, 전석의 크기와 형상, 유입조건, 부유사 농도 등 수 많은 변수들에 영향을 받기 때문에 그 경로를 정확히 예측하기 어렵다. 이 연구는 유리와 철로 된 구형물체가 개수로 흐름에서 이동하는 경로를 조사한 것이며 흐름의 수심, 물체의 크기와 초기침강조건을 고려하여 수리실험을 실시하고 물체의 이동경로와 유하거리를 분석하였다. 개수로 흐름에 유입한 구형 물체는 침강에 의한 항력과 유수에 의한 항력을 동시에 받는다. 이 힘은 물체의 형상, 유수의 점성, 난류, 물체와 물의 밀도차가 복합적으로 작용한 결과이며 구체의 이동경로와 시간을 좌우한다. 실험결과 개수로 흐름에서 낙하중인 구형물체는 하상에 가까워질수록 흐름방향 이동거리가 증가하였다. 물체의 수중무게가 작을수록 유수 중에서 체류하는 시간이 길고 이동거리가 더 크며, 구체에 작용하는 초기항력에 따라 초기 낙하각도와 이동거리가가 증가하는 것을 확인하였다.

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A Study on Spot-billed Ducks' Daily Habitat Use Pattern During Wintering Period in Korea (월동기 흰뺨검둥오리의 일일 서식지 이용에 관한 연구)

  • Shin, Yong-un;Shin, Man-Seok;Lee, Han-soo;Han, Seung-Woo;Jung, Sang-min;Oh, Hong-shik
    • Korean Journal of Environment and Ecology
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    • v.30 no.3
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    • pp.328-334
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    • 2016
  • This study identified the habitat use pattern and migration distance of spot-billed ducks during winter that occur for breed and wintering. The study was carried out using GPS-mobile phone based Telemetry (WT-300) to provide the research results as basic data for protection and management of the habitats of water birds in Korea. The tracking devices (WT-300) were attached to a total of twenty spot-billed ducks collected from the rivers and reservoirs in Gyeonggi-do Anseongcheon, Chungcheongnam-do Seocheongun, Jeollabuk-do Mangyunggang, Dongjingang, and Jeollanam-do Haenamgun. It was found that spot-billed ducks used rivers most frequently as their habitats (47.3%), followed by rice fields, ocean, inland wetlands, and tidal flats. While spot-billed ducks used rice fields at night time and ocean, inland wetlands, and tidal flatss at day time, they used rivers regardless of time. Change rate of habitat use pattern was highest between 6:00am and 8:00am and between 16:00pm and 18:00pm. The average daily migration distance was $0.75{\pm}0.27km$/2hours and accumulated migration distance was 8.95km. Spot-billed ducks covered the longest migration distance between 6:00am and 8:00am and between 16:00pm and 18:00pm; the distance they moved during the periods from 6:00am to 8:00am and from 16:00pm to 18:00pm was 2km but during the rest of the time, it was less than 1km for equivalent durations. The time when spot-billed ducks covered the longest migration distance also corresponds to the time when they showed the greatest change rate of habitat use pattern.

Movements and Home-range of Mallards by GPS-Mobile based Telementary (WT-200) in Korea (야생동물위치추적기(WT-200)를 이용한 청둥오리의 이동거리 및 행동권 연구)

  • Kang, Tehan;Kim, Dal-Ho;Cho, Hae-Jin;Shin, Young-Un;Lee, Hansoo;Suh, Jae-Hwa;Hwang, Jongkyung
    • Korean Journal of Environment and Ecology
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    • v.28 no.6
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    • pp.642-649
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    • 2014
  • Mallard (Anas platyrhynchos) is the abundant winter visitor in South Korea. Mallard migrates long distances between Russian Siberia and Korea. This species prefers a rice paddy area as their winter habitat. We captured birds using cannon-net, and attached the GPS-Mobile phone based Telemetry(WT-200) on Seven Mallards in the winter of 2011~2013. We were monitored wintering home-range and movement distance. We analyzed the tracking location data using ArcGIS 9.0 and calculated Kernel Density Estimation (KDE) and Minimum Convex Polygon (MCP). The average home-range in the wintering ground by MCP was $118.8km^2$(SD=70.1, n=7)and the maximum home-rang was $221.8km^2$ and the minimum was $27.7km^2$. Extents of home-range by KDE were $60.0km^2$(KDE 90%), $23.0km^2$(KDE 70%) and $11.6km^2$(KDE 50%). Mallard moved an average of 19.4 km from start site(attach to WT-200 site), maximum moved was 33.2 km and minimum moved was 9.4 km. The average distance of 0.8 km between GPS fixed point(range 0.2~1.6 km), maximum moved was 19.7 km. Mallard moved a very short distance in wintering season and showed a very high water-dependent trends in wintering site.

Defining the Tumour and Gross Tumor Volume using PET/CT : Simulation using Moving Phantom (양전자단층촬영장치에서 호흡의 영향에 따른 종양의 변화 분석)

  • Jin, Gye-Hwan
    • Journal of the Korean Society of Radiology
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    • v.15 no.7
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    • pp.935-942
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    • 2021
  • Involuntary movement of internal organs by respiration is a factor that greatly affects the results of radiotherapy and diagnosis. In this study, a moving phantom was fabricated to simulate the movement of an organ or a tumor according to respiration, and 18F-FDG PET/CT scan images were acquired under various respiratory simulating conditions to analyze the movement range of the tumor movement by respiration, the level of artifacts according to the size of the tumor and the maximum standardized uptake value (SUVmax). Based on Windows CE 6.0 as the operating system, using electric actuator, electric actuator positioning driver, and programmable logic controller (PLC), the position and speed control module was operated normally at a moving distance of 0-5 cm and 10, 15, and 20 reciprocations. For sphere diameters of 10, 13, 17, 22, 28, and 37 mm at a delay time of 100 minutes, 80.4%, 99.5%, 107.9%, 113.1%, 128.0%, and 124.8%, respectively were measured. When the moving distance was the same, the difference according to the respiratory rate was insignificant. When the number of breaths is 20 and the moving distance is 1 cm, 2 cm, 3 cm, and 5 cm, as the moving distance increased at the sphere diameters of 10, 13, 17, 22, 28, and 37 mm, the ability to distinguish images from smaller spheres deteriorated. When the moving distance is 5 cm compared to the still image, the maximum values of the standard intake coefficient were 18.0%, 23.7%, 29.3%, 38.4%, 49.0%, and 67.4% for sphere diameters of 10, 13, 17, 22, 28, and 37 mm, respectively.

Accelerometer Compensation Algorithm for Distance Measurement (이동거리측정을 위한 가속도센서의 보정 알고리즘)

  • Lee, Byung-Hee;Park, Myung-Kwan
    • Proceedings of the KIEE Conference
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    • pp.2345-2347
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    • 2001
  • 본 연구에서는 반도체형으로 생산된 가속도센서를 적용하여 거리를 측정하는데 있어 문제점에 대해 언급하고, bias drift error에 따른 적분 누적오차를 줄이기 위한 방법으로 random noise를 감소시키고 위치추정을 위한 데이터 융합에 가장 일반적으로 적용되는 Kalman Filter 알고리즘을 적용하여 가속도 데이터를 상대적 위치 데이터로 변환하여 거리측정에 적용하였다. 또한 가속도센서를 관절형 로봇에 부착시켜 실험하여 이동거리를 산출하는 실험을 수행하였다. 실험 결과 보상 알고리즘을 사용했을 때의 zero drift error과 누적오차가 감소됨을 알 수 있었다.

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Implementation and performance estimation of interferometer-type linear scale with high-resolution (고분해능을 갖는 간섭계형 리니어 스케일 제작 및 성능 평가)

  • 김수진;은재정;최평석;권오영
    • Journal of the Institute of Convergence Signal Processing
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    • v.2 no.3
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    • pp.86-92
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    • 2001
  • Position controls are very important in semiconductor manufacturing devices, machine tools, precision measuring instruments, etc. to measure the distance of movement of moving objects in minute units and the accuracy of measurement for the moving distance in these devices affect the performance of the whole devices. Therefore, in those precision instruments, a sensing device that can measure the distance of movement with high-precision resolution is required. Thus an optical encoder that has such advantages as easy digital interface, economical price, and a resolution similar to that of laser interferometers can be used. In this paper, a interferometer-type linear scale with easy digital interface and high-resolution has been set up and measured the distance of movement based on the diffraction principle. Interference signals produced in this optical setup of the linear scale have beers digitalized through fabricated photodetectors and designed signal processing circuits. A resolution of 0.5${\mu}{\textrm}{m}$ is acquired from the experimental interferometer-type linear scale without for the movement of scales any additional dividing circuits. It is shown that from this experiment a high-resolution distance measurement device can be designed by a simple optical setup.

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A Study on the Two-Dimensional Scheduling for Minimization of Moving Distance on the Remote Controllable Web-Camera (원격조정 가능한 웹 카메라의 이동거리 최소화를 위한 이차원 스케줄링에 관한 연구)

  • Cho, Soo-Young;Song, Myung-Nam;Kim, Young-Sin;Hwang, Jun
    • Journal of Internet Computing and Services
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    • v.1 no.2
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    • pp.61-67
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    • 2000
  • In case of the remote controllable web-camera that was took notice especially in internet real-time broadcasting systems, a great many clients connect the server of web-camera to request the service. So, the scheduling methods are important. Web-camera systems have used to the traditional FIFO(First In First Out) or SDF(Shortest Distance First) scheduling method. But they does not satisfy both the minimization of moving distance on the web-camera and the fairness on the users. In this paper, We propose the 2D scheduling method, As a result, the moving distance of the web-camera decreases compared with FIFO scheduling method. And the starvation state on the user's request does not happen compared with SDF scheduling method. Thus, if the remote controllable web-camera systems use the 2D scheduling method, they are satisfied with the minimization of moving distance on the remote controllable web-camera and the fairness on the users simultaneously. Therefore the user's satisfaction and the performance of the systems are improved.

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Jaw movement analysis in subjects with implant-supported prosthesis (임플랜트 보철 환자의 하악 운동에 관한 연구)

  • Kim, Yang-Soo;Kim, Yung-Soo;Kim, Chang-Whe;Kim, Yong-Ho
    • The Journal of Korean Academy of Prosthodontics
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    • v.37 no.4
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    • pp.399-415
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    • 1999
  • 임플랜트 보철 환자의 하악 운동에 관한 연구를 위해 완전 고정성 보철 치료를 한 8명의 환자와 상하악 총의치를 장착한 8명의 환자, 그리고 5명의 자연치아 피검자를 대상으로 Sirognathograph(Siemens, Benshiem, Germany)와 BioPAK program(BioResearch, Milwaukee, U.S.A.)으로 한계운동과 당근시편에 대한 편측 저작운동에 대한 검사를 시행하였다. 편측 저작 운동은 전두면에서의 저작운동의 높이와 폭, 전두면에서의 저작각도, 시상면에서의 절치기준점의 최대 이동거리, 시상면에서의 저작운동의 전후방 이동거리, 최대개구속도, 최대폐구속도의 기준점으로 각 저작주기의 성적을 평균처리 하여 다음과 같은 결론을 얻었다. 1. 전두면에서의 저작운동의 높이는 자연치, 총의치, 임플랜트 군간에 유의성있는 차이가 없었다(p>0.05). 2. 전두면에서의 저작운동의 폭은 임플랜트 군이 자연치, 총의치 군에 비해 유의성있게 작은 수치를 보였다(p<0.05). 3. 전두면에서의 저작각도 분석시 임플랜트 군과 자연치 군, 임플랜트 군과 총의치 군간에 유의성있는 차이가 없었다(p>0.05). 4. 시상면에서의 절치기준점의 최대 이동거리 분석시 임플랜트 군과 자연치 군, 임플랜트 군과 총의치군간에 유의성 있는 차이가 없었다(p>0.05). 5. 시상면에서의 전후방이동거리는 자연치 군이 임플랜트 군, 총의치 군에 비해 유의성 있게 크게 나타났다(p<0.05). 6. 최대개구속도는 자연치 군이 총의치 군과 임플랜트 군에 비해 유의성 있게 작은 수치를 보였다(p<0.05). 7. 최대폐구속도는 각 군간에 유의성 있는 차이가 없었다(p>0.05). 8. 저작운동은 개인간의 차이가 커서 명확한 결론을 유추하기가 어려웠다.

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Locomotion Characteristics of a Foxtail and a Foxtail-like Robot (강아지풀 및 강아지풀모사로봇의 이동특성에 관한 연구)

  • Lee, Min-Su;Kim, Yeong-Hyeok;Leem, Sang-Huyck;Kim, Byung-Kyu
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.34 no.12
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    • pp.1893-1899
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    • 2010
  • A foxtail moves forward on a flat surface when pushed by a vertical force. The distance moved by the foxtail depends on the degree of deformation. We experimentally investigated the main parameters that influence the distance moved while varying the pushing force, area, and velocity. We then fabricated a nylon barb that mimics the foxtail barb and performed theoretical and experimental analyses of the displacement according to the acting force and the deflection. In addition, we investigated the relation between the displacement and the angle of a foxtail-like robot's leg by varying the clearance between the robot body and the inner surface of the pipe. To find the design parameters of the barb of the robot for tubular-type digestive organs and blood vessels, we studied the relation between the acting force and the elastic modulus while varying the leg diameter.