• 월간산업보건
• /
• s.295
• /
• pp.24-34
• /
• 2012

• Proceedings of the Korean Biblia Society for Library and Information Science Conference
• /
• 2005.05a
• /
• pp.65-96
• /
• 2005

• 월간산업보건
• /
• s.171
• /
• pp.13-23
• /
• 2002

• Proceedings of the Korean Institute of Landscape Architecture Conference
• /
• 2020.06a
• /
• pp.87-88
• /
• 2020

• Journal of the Korean Society for Railway
• /
• v.11 no.3
• /
• pp.216-224
• /
• 2008

In general, based on criteria of subway law, radius 500m from subway station is defined as SIA(Subway Station Influence Area). Therefore, in this paper, selection models of SIA are developed to identify appropriate SIA for recently developed 4 new towns based based on CART analysis. As a result, following outputs are obtained; (1) walking distance from subway station is the most influential factor to define SIA (2) SIAs vary with new towns (i.e., bundang city: 856m, ilsan sanbon city 508m, pyungchon city 495m), and (3) walking distance from subway station is influential to land price of SIA. In addition, bundang and pyungchon new town are more affected in land price and walking distance. Therefore, it is desirable for current definition of SIA (radius 500m from subway station) to reflect characteristics of land use and walking distance in the new towns.

• Journal of the Korean Geographical Society
• /
• v.48 no.6
• /
• pp.978-993
• /
• 2013

It can be advantage as well as disadvantage to use the spatial weight matrix in a spatial regression model; it would benefit from explicitly quantifying spatial relationships between geographical units, but necessarily involve subjective judgment while specifying the matrix. We took Incheon City as a study area and investigated how the fitness of a spatial regression model changed by constructing various spatial weight matrices. In addition, we explored neighborhood segmentation in the study area and analyzed any influence of it on the model adequacy of two basic spatial regression models, i.e., spatial lagged and spatial error models. The results showed that it can help to improve the adequacy of models to specify the spatial weight matrix strictly, that is, interpreting the neighborhood as small as possible when estimating land price. It was also found that the spatial error model would be preferred in the area with serious spatial heterogeneity. In such area, we found that its spatial heterogeneity can be alleviated by delineating sub-neighborhoods, and as a result, the spatial lagged model would be preferred over the spatial error model.

• Proceedings of the KAIS Fall Conference
• /
• 2010.05b
• /
• pp.851-854
• /
• 2010

본 연구는 견관절 통증이 있는 노인을 대상으로 테이핑 요법과 수동적 관절가동범위운동이 견관절의 통증, 관절 가동력, 손의 민첩성에 미치는 효과를 확인하기 위하여 실시하였다. 연구대상자는 B시의 D복지관을 이용하는 65세의 이상의 노인들 중 견관절 통증을 호소하는 노인 40명이었고 연구기간은 4주간 총12회로 테이핑 요법과 수동적 관절가동범위운동을 적용하였다. 연구를 시작하기 전과 후에 견관절의 통증, 견관절의 가동범위, 손의 민첩성을 측정하였다. 통증정도는 시각적 상사척도를 사용하여 측정하였고, 견관절의 가동범위는 인체각도기를 사용하여 측정하였다. 유의수준은 p<.05로 설정하였다. 그 결과, 테이핑과 수동적 관절가동범위 운동을 적용 후에 노인의 견관절 통증은 감소하였고 견관절의 가동력과 손의 민첩성이 증가하였다. 노인의 견관절 통증의 감소정도와 손의 민첩성 정도는 테이핑군과 관절 범위운동군 간에 차이가 나타나지 않았다. 노인의 견관절 가동범위의 변화정도는 관절범위운동군보다 테이핑군에서 견관절 신전과 외전에서 관절의 범위가 증가하는 정도가 더 큰 것으로 나타났다. 따라서 테이핑요법과 수동적 관절범위운동은 노인의 견관절 통증을 감소시키고, 관절가동범위, 손의 민첩성과 같은 신체적인 기능의 개선을 가져온다고 할 수 있겠다. 또한 테이핑의 적용이 견관절 운동범위 증가에는 더 효과적이라고 할 수 있다.

• The KIPS Transactions:PartC
• /
• v.12C no.4 s.100
• /
• pp.473-480
• /
• 2005

We can obtain useful information by deploying large scale sensor networks in various situations. Security is also a major concern in sensor networks, and we need to establish pairwise keys between sensor nodes for secure communication. In this paper, we propose new pairwise key establishment mechanism based on clustering and polynomial sharing. In the mechanism, we divide the network field into clusters, and based on the polynomial-based key distribution mechanism we create bivariate Polynomials and assign unique polynomial to each cluster. Each pair of sensor nodes located in the same cluster can compute their own pairwise keys through assigned polynomial shares from the same polynomial. Also, in our proposed scheme, sensors, which are in each other's transmission range and located in different clusters, can establish path key through their clusterheads. However, path key establishment can increase the network overhead. The number of the path keys and tine for path key establishment of our scheme depend on the number of sensors, cluster size, sensor density and sensor transmission range. The simulation result indicates that these schemes can achieve better performance if suitable conditions are met.

• Journal of radiological science and technology
• /
• v.31 no.2
• /
• pp.177-182
• /
• 2008

Digital imaging for general rediography has many advantages over the film/screen systems, including a wider dynamic range and the ability to manipulate the images produced. The wider range means that acceptable images may by acquired at a range of dose levels, and therefore repeat exposures can be reduced. Digital imaging can result in the over use of radiation, however, because there is a tendency can be reduced. Digital imaging can result in the over use of radiation, however, because there is a tendency for images to be acquired at too high a dose. We investigated the actual exposure dose conditions on general radiography and a questionnaire survey was conducted with radiotechnologiest at medical institutions using digital radiology system. As a results, the dose of exposure was not controlled with patient's figure and dose optimization but was controlled by worker's convenience and image quality. Radio-technologiests often set up the exposure dose regardless of patient figure and body part to be examined. Many organizations, such as the International Commission on Radiological Protection, recommend to keep the dose as low as possible. In addition, they strongly recommend to keep the optimal but minimal dosage by proper training programs and constant quality control, including frequent patient dose evaluations and education.

• Journal of the Korean Association of Geographic Information Studies
• /
• v.7 no.1
• /
• pp.62-74
• /
• 2004

Baekdu-daegan is the greatest mountain chain as well as the major ecological axis of the Korean Peninsula. In recent year, however, this area is faced with the various kinds of developmental urge. To cope adequately with these problems, this study was executed to prepare synthetic and systematic management with conservation-oriented strategy for Baekdu-daegan and to suggest spatially definite zoning for the managerial area. This study is to take into consideration the traditional concepts of stream and watershed as well as the actual disturbance on Baekdu-daegan area. The study area is selected with semi-mountainous type, from Namdeokyusan to Sosagogae. To propose the process for reasonably establishing the managerial boundary adjacent to the Ridges, the analysis was carried out that ArcGIS was mainly used for its analysis with digital maps, Landsat TM image and ArcGIS Hydro Model. Landsat TM image was classified by 5 land use types such as cultivated land, urban area, barren area, water body and forest. Based on these analyses results, the managerial boundaries as alternatives from the Ridges were produced by watershed expansion process, and used for tracing the changes of areal ratio of various land use types to the relevant watersheds to search out the adequate managerial boundary. The results show that watershed expansion process could be effective tool for establishing the managerial boundary, and eighth expanded watershed toward Muju-Gun(west) and fifth expanded watershed toward Geochang-Gun(east) might be included for the adequate managerial boundary of the case site.