• 정보교육학회논문지
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• 제21권5호
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• pp.595-605
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• 2017

본 논문에서는 지역규모에 따라 초등학생의 ICT 리터러시 점수가 차이나는 원인을 분석하였다. 선행연구에 따르면 2016년 측정된 초등학생들의 ICT 리터러시 점수는 대도시, 중소도시, 읍면지역 순으로 높게 나타났다. 이에 본 논문에서는 그 원인을 알아보고자 지역규모별 초등학생들의 평소 ICT 활용 습관 차이와 ICT 리터러시 점수를 비교하여 분석하였다. 그 결과, 지역규모가 클수록 초등학생들의 ICT 리터러시 점수가 높은 원인은 큰 지역에 거주하는 학생들이 작은 지역에 거주하는 학생들보다 가정에서 컴퓨터를 사용하는 기회가 더 많고 컴퓨터를 이용하여 학습 활동을 더 많이 하며, 정보(컴퓨터)교육을 받은 경험도 더 많기 때문인 것으로 판단되었다. 이에 따라 본 논문에서는 지역 간 초등학생의 정보격차를 줄이기 위하여 지역규모가 작은 저소득계층의 자녀들에 대한 컴퓨터 지원과 함께 가정에서 컴퓨터를 활용한 학습 활동 안내 그리고 정보(컴퓨터)교육 기회 확대 등을 종합적으로 지원할 것을 제안하였다.

• 대한한의학회지
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• 제37권3호
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• pp.27-38
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• 2016

Objectives: According to Korean Medicine theory, the skin color of LU10 serves as a diagnostic clue to dyspeptic symptoms. The aims of this study were (1) to find the difference of skin color in LU10 region between functional dyspepsia (FD) and healthy control (HC) and (2) to examine the relationship between LU10 skin color parameters and dyspeptic symptoms. Methods: 39 participants (29 FD and 10 HC) have participated in this study. They were asked to complete gastrointestinal scale (GIS), gastrointestinal symptom rating scale (GSRS), Nepean dyspepsia index (NDI), functional dyspepsia-related quality of life (FD-QoL), visual analogue scale (VAS) for dyspeptic symptoms, food retention questionnaire (FRQ) and cold heat questionnaire (CHQ). $L^*$ (luminance), $a^*$ (red-green balance) and $b^*$ (yellow-blue balance) values of LU10 region were calculated through digital images of the participant's hand. Then we evaluated test-retest reliability of $L^*$, $a^*$ and $b^*$ values of LU10 region. Additionally, we compared $L^*$, $a^*$ and $b^*$ values of LU10 between FD and HC, and examined the relationship between LU10 color parameters and seven questionnaires scores. Results: Only $L^*$ values in LU10 region were significantly higher in FD compared with HC. GIS scores and the subset scores of NDI had a positive correlation with $L^*$ values significantly. Correlation coefficients of test-retest reliability of skin color measurement of LU10 ranged from 0.871 to 0.936 representing very strongly statistically significant (P<0.001). Conclusions: We confirmed the difference of skin color in LU10 region between FD and HC, and relationship between LU10 skin color parameters and dyspeptic symptoms.

• 한국농공학회논문집
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• 제50권3호
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• pp.115-123
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• 2008

Evapotranspiration mapping using both meteorological ground-based measurements and satellite-derived information has been widely studied during the last few decades and various methods have been developed for this purpose. It is significant and necessary to estimate regional evapotranspiration (ET) distribution in the hydrology and water resource research. The study focused on analyzing the surface ET of Chungbuk region using Landsat 7 ETM imagery. For this process, we estimated the regional daily evapotranspiration on May 8, 2000. The estimation of surface evapotranspiration is based on the relationship between Temperature Vegetation Dryness Index (TVDI) and Morton's actual ET. TVDI is the relational expression between Normalized Difference of Vegetation Index (NDVI) and Land Surface Temperature (LST). The distribution of NDVI corresponds well with that of land-use/land cover in Chungbuk. The LST of several part of city in Chungbuk region is higher in comparison with the averaged LST. And TVDI corresponds too well with that of land cover/land use in Chungbuk region. The low evapotranspiration availability is distinguished over the large city like Cheongju-si, Chungju-si and the difference of evapotranspiration availability on forest and paddy is high.

• 한국통신학회논문지
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• 제23권9A호
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• pp.2325-2332
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• 1998

In this paper, the quality scalable coding of selected region is presented. If a region is semantically more important than the others, it is appropriate that the image compression shcem is capable of handling the regional semantic difference because the information loss of the region of interest is more severe. We propose the quality scalable coding with its model by interoducing the quality scale parameter. It is more extended and generalized image compression philosophy than te conventional coding. As an implementation of the proposed quality scalable coding, H.263 based scheme is presented. This scheme can control the temporal and spatial quality efficiently, and improve the reconstructed image quality of the region of interest.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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• pp.179-184
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• 2001

The objective of this study is to clarify the seismic capacity and the characteristics in the hysteretic behavior of RC structures with nonseismic detailing. To do this, an exterior beam-column subassemblage was selected from a 10-story RC building and 6 1/3-scale specimens were manufactured with 3 variables; ⑴ with and without slab, ⑵ upward and downward direction of anchorage for the bottom bar in beams, and ⑶ with and without hoop bars in the joint region. The test results have shown that ⑴ the existence of slab increased the strength in positive and negative moment, 25% and 62%, respectively; ⑵ the Korean practice of anchorage (downward and 25 $d_{b}$ anchorage length) caused the 8% reduction of strength and the early strength degradation when compared with the case of seismic details; and ⑶ the existence of hoop bars in the joint region does not show significant difference because the size of column is much larger than that of beam.m.

• 한국멀티미디어학회논문지
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• 제18권1호
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• pp.17-24
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• 2015

In this paper, a novel scheme for correcting rotated region in medical images using SIFT(Scale Invariant Feature Transform) algorithm is presented. Using the feature extraction function of SIFT, the rotation angle of rotated object in medical images is calculated as follows. First, keypoints of both reference and rotated medical images are extracted by SIFT. Second, the matching process is performed to the keypoints located at the predetermined ROI(Region Of Interest) at which objects are not cropped or added by rotating the image. Finally, degrees of matched keypoints are calculated and the rotation angle of the rotated object is determined by averaging the difference of the degrees. The simulation results show that the proposed scheme has excellent performance for correcting the rotated region in medical images.

• 한국환경과학회지
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• 제26권4호
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• pp.543-547
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• 2017

Normalized Difference Vegetation Index (NDVI) has played an important role in assessing green plant biomass through remote sensing on global scale since the early 1970s. The concept of NDVI is based on the fact that green plants show higher reflection in near-infrared region than in visible region of the electromagnetic spectrum. However, it is well known that the relocation of chloroplasts in plant leaf cells may dramatically change the optical properties of plant leaves. In this study I traced the changes in the reflectance and transmittance properties of Tobacco leaves at the wavelengths of 660 and 800 nm after a sudden increase in light intensity. The results showed that NDVI of leaves gradually decreased from 72.7% to 69.9% when exposed to a sudden increase in light intensity from 30 to $1,200{\mu}mol/m^2{\cdot}s$. This means that the error resulting from the physiological status of the plant should be accounted for a more precise understanding of ground truth corresponding to the data from the remotely acquired images.

• 한국연소학회지
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• 제13권1호
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• pp.31-43
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• 2008

Oxy-fuel flame has a significantly different structure from that of air-fuel flame because of its high temperature. This study is aimed to find out the difference of the oxy-fuel flame structure in order to understand reaction mechanism closely, which is crucial to design real-scale oxy-fuel combustion system. By examining pictures of counterflow flame and LIF images, we found that oxy-fuel flame had two-zone structure: fuel decomposition region and distributed CO oxidation region. In the oxy-fuel flame, OH radical was distributed intensely through the whole flame due to its higher flame temperature than crossover temperature. For showing those features of the oxy-fuel flame, 1 MW scale IFRF oxy-natural gas burner was simulated by conditional moment closure(CMC) model. Calculation results were compared with experimental data, and showed agreements in trend. In the simulated distributions of fuel decomposition/CO oxidation rates, CO oxidation region was also separated from fuel decomposition zone considerably, which showed the two-zone structure in the oxy-fuel flame.

• 천문학회보
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• 제42권2호
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• pp.81.3-81.3
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• 2017

In this paper, we report a small-scale emerging island and double arc loops, which are associated with a M6.5 flare, in Active Region 12371. We investigate the spatial and temporal changes of both photospheric magnetic fields using SDO/HMI data and coronal magnetic structures obtained from nonliner force-free field (NLFFF) extrapolation. From the vector magnetograms, we find a small-scale emerging island near the main polarityy inversion line about three hours before the flare. The island has a strong shear angle, which is determined by difference between transverse component of observed field and potential field, of around 90 degrees. Furthermore, the NLFFF well reproduces a sigmoidal structure seen in SDO/AIA 94, which is consistent with the double arc loops configuration suggested by Ishiguro and Kusano (2017) who introduced a magnetic configuration showing the double arc instability. The observed emerging island is located among the double arc loops, which is also supproted by their model. Finally, there was an eruption (M6.5 flare) associated with the loops. We discuss a possible role of the double arc instability for the eruption.

• 지적과 국토정보
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• 제44권2호
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• pp.155-175
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• 2014

본 연구는 산업과 인구의 이동현상을 대상으로 한 공간적 패턴 분석의 필요성을 인지하고, 수도권에서 충남으로 이전한 가구의 가구특성 및 공간적 패턴을 파악한 후 종합적으로 지리적 가중 회귀분석을 통해 수도권 기업의 지방이전에 따른 인구이동의 관계성을 도출하는 것을 목표로 삼았다. 분석결과 수도권에서 충청남도로 전입하는 인구는 직업을 주 목적으로 예산과 아산을 중심으로 하여 1, 2인 가구가 주로 전입하고 있었으며, GWR을 통해 연구지역의 시 군별로 직업을 사유로 이동하는 인구의 이동 요인을 파악한 결과 경제적 요인 이외에도 인구 요인과 교통 요인, 주거환경 요인 등의 영향을 받고 있었다. 위와 같은 분석결과들을 공공기업의 지방이전 및 수도권 기업의 기업이전에 따른 도시조성과 연관시켜 생각함으로써 다음과 같은 정책적 시사점들을 이끌어 낼 수 있었다. 첫째로, 현재 충청남도의 탈 수도권인구의 이동에 있어 수도권 기업의 이전에 따른 영향이 직접적으로 미치는 지역은 '시'단위의 규모보다 '군'단위의 소도시에서 효과가 더욱 좋은 것을 볼 수 있었다. 그럼에도 수도권 유출인구가 천안시, 아산시, 당진시 같은 대형 '시'단위의 도시로 가장 많이 이주하는 것은 사람들이 거주지를 선택함에 있어서는 직장 외 다른 이유가 작용한다는 것을 시사해준다. 둘째로, 향후 직업을 사유로 이동하는 인구는 개인단위보다는 가족단위의 이동이 대두될 것이며 유년 고령인구 위주로 거주지를 선택하게 될 것이므로 유년층 혹은 고령층에 대비하여 정주환경을 개선할 필요가 있다.