• 제목/요약/키워드: science drawing

검색결과 874건 처리시간 0.023초

R 소프트웨어를 이용한 대기오염 데이터의 시각화 (Data visualization of airquality data using R software)

  • 오영창;박은식
    • Journal of the Korean Data and Information Science Society
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    • 제26권2호
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    • pp.399-408
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    • 2015
  • 본 논문은 대기오염 자료를 여러 가지 방법의 데이터 시각화를 통해 나타내었고, 데이터 시각화 방법별로 통계적인 방법을 활용한 분석과 연계하여 어떤 특징을 알아 볼 수 있는지를 나타냈다. 데이터 시각화 도구로는 통계 패키지인 R을 사용하였다. 분석에 사용된 데이터는 뉴욕시에서 1973년 5월부터 9월까지 공기의 질을 측정한 자료이다. 먼저 단변량 분석과 단순회귀분석을 실시하여 데이터 시각화를 통해 자료의 기본적인 특성을 파악하고 시각화 방법으로 산점도행렬 등을 통해 특성을 한눈에 볼 수 있게 나타내었다. 다중 회귀 분석을 실시하여 로그변환 등을 이용하여 최적의 모형을 찾고 설명변수들을 범주화하여 상자그림이나 3차원 투시도, 3차원 산점도 등 여러 데이터 시각화 방법을 이용해 대기오염 데이터의 전체적인 특성들을 알아보았다.

독서치료 프로그램이 초등학생의 학교생활 적응에 미치는 영향 - 상호작용 놀이 활동을 중심으로 - (The Effects of Bibliotherapy Program on Elementary School Students' Adaptation to School Life: Based on Play oriented interaction)

  • 정호선;조미아
    • 한국비블리아학회지
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    • 제31권2호
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    • pp.5-26
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    • 2020
  • 이 연구는 상호작용 놀이 활동 독서치료 프로그램이 초등학교 저학년 학생의 학교생활 적응에 어떠한 영향을 미치는지 그 효과를 검증하는데 목적이 있다. 이를 위하여 서울시 K구에 위치한 초등학교 2학년 학생을 대상으로 학교생활 적응력 향상을 위한 상호작용 놀이 활동 독서치료 프로그램을 설계하여 학교도서관에서 회기별 90분씩 총 12회기로 실시하였으며, 효과 측정을 위하여 학교생활 적응도 검사와 동적 학교생활화 검사를 독서치료 프로그램 사전과 사후에 실시하였다. 연구의 주요 결과를 요약하면 다음과 같다. 첫째, 상호작용 놀이 활동 독서치료 프로그램은 초등학교 2학년 일반학생의 학교생활 적응 전체에 긍정적인 영향을 미친 것으로 나타났다. 둘째, 학교생활 적응의 하위요인인 교사관계, 교우관계, 학교수업, 학교규칙 준수에 긍정적인 영향을 미친 것으로 나타났다.

Astronomical Characteristics of Cheonsang-yeolcha-bunyajido from the Perspective of Manufacturing Methods

  • Ahn, Sang-Hyeon
    • Journal of Astronomy and Space Sciences
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    • 제32권1호
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    • pp.51-62
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    • 2015
  • I investigated a method for drawing the star chart in the planisphere Cheonsang-yeolcha-bunyajido. The outline of the star chart can be constructed by considering the astronomical information given in the planisphere alone and the drawing method described in Xin-Tangshu; further the chart can be completed by using additional information on the shape and linking method of asterisms out of an inherited star chart. The circles of perpetual visibility, the equator, and the circle of perpetual invisibility are concentric, and their common center locates the Tianshu-xing, which was defined to be a pole star in the Han dynasty. The radius of the circle of perpetual visibility was modified in accordance with the latitude of Seoul, whereas the other circles were drawn for the latitude of $35^{\circ}$, which had been the reference latitude in ancient Chinese astronomy. The ecliptic was drawn as an exact circle by parallel transference of the equator circle to fix the location of the equinoxes at the positions recorded in the epitaph of the planisphere. The positions of equinoxes originated from the Han dynasty. The 365 ticks around the boundary of the circle of perpetual invisibility were possibly drawn by segmenting the circumference with an arc length instead of a chord length with the ratio of the circumference of a circle to its diameter as accurate as 3.14 presumed. The 12 equatorial sectors were drawn on the boundary of the star-chart in accordance with the beginning and ending lodge angles given in the epitaph that originated from the Han dynasty. The determinative lines for the 28 lunar lodges were drawn to intersect their determinative stars, but seven determinative stars are deviated. According to the treatises of the Tang dynasty, these anomalies were inherited from charts of the period earlier than the Tang dynasty. Thus, the star chart in Cheonsang-yeolcha-bunyajido preserves the old tradition that had existed before the present Chinese tradition reformed in approximately 700 CE. In conclusion, the star chart in Cheonsang-yeolcha-bunyajido shows the sky of the former Han dynasty with the equator modified to the latitude of Seoul.

Variations in lateral abdominal muscle thickness during abdominal drawing-in maneuver in three positions in a young healthy population

  • Ko, Young Jun;Ha, Hyun Geun;Jeong, Juri;Lee, Wan Hee
    • Physical Therapy Rehabilitation Science
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    • 제3권2호
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    • pp.101-106
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    • 2014
  • Objective: To investigate the appropriate position for abdominal drawing-in maneuver (ADIM) exercise by rehabilitative ultrasound image. Design: Cross-sectional study. Methods: Twenty-eight young adults with no history of low back pain participated in the study. Three positions compared were crook lying position with hip $60^{\circ}$ flexion, standing position with the feet hip width apart and knees straight, and saddle standing positionunsupported with the knees $20^{\circ}$ flexed. Once in the appropriate position, the subjects were verbally cued to draw in their abdominal wall, with the intention of pulling their navel inward toward their lower back. The thickness of each transversus abdominis (TrA), internal oblique (IO), and external oblique (EO) muscles were measured via ultrasound and recorded at the end of inspiration. Results: When compared to the TrA thickness of rest, the TrA thickness was significantly increased in all three positions (crook lying, standing, and saddle standing) during the ADIM (p<0.05). IO thickness was significantly greater in standing and saddle standing than in crook lying (p<0.05). EO thickness was constant in all the three positions. Conclusions: The present study suggests that standing and saddle standing positions could be recommended for the ADIM to maximize recruitment of the TrA and IO activation. Specifically, the saddle standing position with knees flexed to $20^{\circ}$ was observed to increase the TrA activation more than the standing position. These findings should be considered when core stability exercises such as the ADIM are conducted.

3차원 스캐닝을 활용한 단청문양의 간접전사 연구 (A Study on the Indirect Copy of Dancheong Patterns Using Three-dimensional Scanning)

  • 안지은;최찬호;김성준;윤만영
    • 보존과학회지
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    • 제34권6호
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    • pp.471-479
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    • 2018
  • 선운사 대웅전의 훼손된 단청문화재를 대상으로 3차원(3D) 스캐닝을 활용한 간접전사방식을 통해 단청 문양에 직접 손을 대지 않고 1:1 비율로 모사도를 제작하였다. 기존 단청문양의 모사방법은 트레싱지를 단청 위에 대고 핀을 고정한 이후에 네임펜을 사용해서 아웃라인을 그리고 아웃라인을 사용해서 전체적인 비율로 모사도를 제작하고 있다. 때문에 대상 단청에 직접전사하는 수작업 방식으로 대상물의 손상 우려와 조사자 개인의 치수 오차가 항상 내재되어 있다. 본 연구는 기존의 단청문화재 모사도 제작 과정 방식에서 오는 여러 가지 문제점의 대안으로 3D 스캐닝을 통한 간접전사방식을 제안하여 형상의 왜곡이나 치수 오차의 발생을 감소시키고 훼손을 방지할 수 있었다. 연구 결과 비교적 객관적이고 정밀한 실제 비율의 모사도를 제작하였고 제작 과정에 관한 관련 데이터를 구축할 수 있었다. 또한 모사도 및 복원도의 제작뿐만 아니라 3D 원본데이터, 가공 3D 데이터, 부재도면 등의 다양한 자료들을 폭넓게 이용 가능하며 3D 컨텐츠 제작으로 새로운 가상 박물관의 운용 또한 가능할 것으로 생각된다.

Comparison of Upper Extremity Muscle Activity between Stroke Patients and Healthy Participants while Performing Bimanual Tasks

  • Namwoo Kim;Sungbae Jo;Kyeong Bae;Changho Song
    • Physical Therapy Rehabilitation Science
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    • 제11권4호
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    • pp.526-534
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    • 2022
  • Objective: The purpose of this study was to compare muscle activities of stroke patients and healthy participants during bimanual tasks. Design: A cross sectional study. Methods: A total of 25 participants (13 hemiparetic stroke patients and 12 healthy participants) were recruited. The muscle activities using electromyogram (EMG) during bimanual tasks were collected from the following muscles: extensor carpi radialis longus (ECRL), biceps brachii (BB), and triceps brachii (TB). The bimanual tasks included eight tasks consisted of (1) raising the wrists up and down, (2) supinating and pronating the palms, (3) touching the shoulder with fingertips, (4) drawing vertical dot, (5) reaching for a cup and bring it in to drink, (6) drawing a circle outward and (7) inward, and (8) grasping the fingers. The EMG data collected from the muscles of paretic and non-paretic sides of stroke patients and the average from both sides of healthy subjects were normalized and compared after calculating the percentage of maximal isometric voluntary contraction. Results: The ECRL, BB and TB of the paretic side of the stroke patients showed relatively greater muscle activity compared to the non-paretic side as well asaverage of the healthy subject duringall tasks (p<0.05). In addition, the ECRL showed the highest muscle activity during most of the tasks. All of the non-paretic side musclesfrom stroke patients showed higher muscle activity compared to those of healthy subjects. Conclusions: The current study showed that muscle activities of upper extremity varied between paretic and non-paretic sides of stroke patients during bimanual tasks. Interestingly, the non-paretic side muscle activities were also different from those of normal participants.

A Computer-aided Design Tool with Semiautomatic Image-Processing Features for Visualizing Biological Pathways

  • Ham, Sung-Il;Yang, San-Duk;Thong, Chin-Ting;Park, Hyun-Seok
    • Genomics & Informatics
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    • 제7권3호
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    • pp.168-170
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    • 2009
  • The explosion in biological data resulting from high-throughput experiments requires new software tools to manipulate and display pathways in a way that can integrate disparate sources of information. A visual Java-based CAD tool for drawing and annotating biological pathways with semiautomatic image-processing features is described in this paper. The result of the image-editing process is an XML file for the appropriate links. This tool integrates the pathway images and XML file sources. The system has facilities for linking graphical objects to external databases and is capable of reproducing existing visual representations of pathway maps.

Effect of different Bombyx mori silkworm varieties on the wet spinning of silk fibroin

  • Jang, Mi Jin;Um, In Chul
    • International Journal of Industrial Entomology and Biomaterials
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    • 제30권2호
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    • pp.75-80
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    • 2015
  • The wet spinning of silk solution has attracted researchers' attention because of 1) unique properties of silk as a biomedical material and 2) easy control of the structure and properties of the regenerated silk fiber. Recently, studies have reported that different silkworm varieties produce silk with differences in the molecular weight (MW) and other mechanical properties of the regenerated silk fibroin (SF) film. In this study, we look at the effect of different Bombyx mori varieties on the wet spinning of SF. Although five regenerated SFs from different silkworm varieties have different MWs and solution viscosity, the wet spinnability and post drawing performance of regenerated SFs were not different. This result is due to low variability in the MW of the regenerated SF samples from the different silkworm varieties. In addition, unlike regenerated SF films, the mechanical properties of wet spun regenerated SF filament were not affected by silkworm variety. This result suggests that the mechanical properties of wet spun SF filament are less affected by MW than those of SF film are.

변형률 의존성 연성파괴이론과 유한요소법에 의한 AZ31합금 판재의 드로잉 성형공정시 파단발생 예측 (Fracture Prediction in Drawing Processes of AZ31 alloy Sheet by the FEM combined with a Ductile Fracture Criterion considering Strain Rate Effect)

  • 김상우;이영선;김대용
    • 한국산학기술학회:학술대회논문집
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    • 한국산학기술학회 2011년도 추계학술논문집 2부
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    • pp.614-616
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    • 2011
  • 본 연구에서는 유한요소법과 변형률 의존성 연성파괴이론을 이용하여 드로잉 공정에서의 AZ31 마그네슘 합금 판재의 파단 발생을 예측 하였다. 다양한 온도에서의 사각컵 드로잉 실험을 수행하여, 각 온도조건에서의 파단깊이를 측정하였으며, 고온 인장시험을 통해 연성파괴상수를 온도 및 변형률 속도에 의존적인 값으로 표현하고, 실험과 동일하게 모사된 유한요소해석을 수행하였다. 해석결과 얻어진 각 요소의 온도 및 변형률 속도에 따른 연성파괴상수를 이용하여 파단발생을 예측하였으며, 실험결과와 검증하였다.

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Re-production of Digital Cultural Heritage and Acquisition of Two Dimensional Drawing Maps for the Cultural Heritage by the Reverse Engineering Technology

  • Lee, Suk Bae;Auh, Su Chang
    • 대한공간정보학회지
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    • 제24권2호
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    • pp.71-78
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    • 2016
  • After the 'Guidelines for the preservation of digital heritage' were published by UNESCO, interests in the fabrication of digital cultural heritage have been increasing throughout the world. The present study was intended to fabricate digital cultural heritages for existing cultural properties using the reverse engineering technology and obtain two-dimensional drawings. Jinju Castle Gongbukmun, which is a cultural property, was selected as a study subject and 3D modeling of Jinju Castle Gongbukmun was conducted by implementing 3D scanning and processing the point cloud data. Using the Gongbukmun 3D model (3D-Gongbukmun) made as such, requirements as a digital heritage were reviewed and 2D drawings of Gongbukmun such as front views, ground plans, and side views could be prepared.