• Investigative Magnetic Resonance Imaging
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• v.15 no.2
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• pp.102-109
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• 2011

Purpose : To retrospectively evaluate the usefulness of diffusion-weighted images, ADC maps and conventional MR images for determination of brain tumor consistency. Materials and Methods : Twenty-three patients with brain tumor underwent MR examinations with T1, T2 and diffusion-weighted images. Regions of interest (ROIs) were drawn in the tumors, and the measured signal intensities (SI) were normalized with the contralateral side. We evaluated the correlation between SI ratios from various images and tumor consistency assessed at surgery. In three patients with both cystic and solid components, each component was evaluated independently. Qualitatively observed SIs were also correlated with tumor consistency. Results : Statistical analysis revealed significant correlation between tumor consistency and ADC ratio (r = -0.586, p = 0.002), SI ratios on T2-weighted images (r = -0.497, p = 0.010), and observed SIs on T2-weighted images (r = -0.461, p = 0.018). The relative ratio of ADC value correlated with tumor consistency most strongly. Conclusion : The measured ratio of ADC, SI ratio and observed SI grade on T2-weighted images can provide valuable information about the consistency of brain tumor.

• International Journal of Highway Engineering
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• v.10 no.4
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• pp.65-77
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• 2008

LOS(Level of Service) concept are popularly used in many countries as the MOEs to evaluate the road construction and operation plans. However, MOEs such as travel time and delay only measure quantitative factors describing traffic flow, although qualitative factors such as scenic, comfort and reliable factors are very important for roadway drivers to define the LOS. Therefore, this paper are focusing on verifying the difference between perceived LOS and LOS in KHCM, and proving qualitative factors affecting Drivers' Perceived LOS in Urban Arterial. As a result, following outputs are obtained; (1) verifying the difference between perceived LOS(PLOS) and LOS in KHCM (2) proving that qualitative factors such as scenic and driver behavior factors affects PLOS (3) suggesting that qualitative factors should be considered in MOEs of LOS

• Journal of Environmental Policy
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• v.12 no.1
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• pp.3-35
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• 2013

Through Influence between the qualitative Environment-friendly Planning Elements (Independent variable) of eighty Apartment House on the four boundary areas in Metropolitan 2th Newtown as representative case of domestic Composition case of Eco-City and the quantitative deal price of Apartment House (dependent variable), it was analyzed empirically with use of the statistical measuring technique. This study has been meaning that it was groped the scheme of quantitative measuring analysis on environmental economics through the developmental extention for he classification system of the qualitative Environment-friendly Planning Elements on urban & architecture. And, As the result of empirical analysis, it was confirmed empirically that the economical induction effect was much more weight and worthy of notice through Environment-friendly Planning Elements in Metropolitan 2th Newtown influenced to the deal price of Apartment House, particularly it was found noticeable meaning that Environment-friendly Planning Elements of applicabled the green new techniqe like New & Renewable Energy were used already and it was influenced much to the deal price of Apartment House.

• Journal of Korean Orthopaedic Sports Medicine
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• v.6 no.1
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• pp.5-12
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• 2007

견관절의 다방향 불안정성은 생역학 및 생화학적 이상의 복합적 요인에 의해 발생되는 것으로 알려져 있으나 이에 대한 보다 많은 연구가 이루어져야 될 것으로 생각된다. 최근 다방향 불안정성과 관련된 요소에 따라 분류가 세분화되어 치료가 이루어지고 있다. 따라서 진단시 세심한 병력과 진찰이 매우 중요하며 이에 따라 치료 방침을 결정해야 할 것이다. 많은 환자에서 삼각근, 회전근 개, 견갑 안정화 근육을 강화시킴으로써 증상이 호전되나 비수술적 치료에 호전이 없는 경우는 관절 낭 이동술을 이용하여 비교적 만족스러운 결과를 얻을 수 있다. 일반적으로 개방적 술식이 다방향 불안정성을 위한 수술적 치료의 표준적 술식으로 알려져 있으나. 최근에는 여러 관절경적 술식이 개발되고 있고 이에 따른 중 단기 추시 결과도 비교적 좋은 것으로 보고되고 있다. 그러나 이 술식에 대한 정확한 평가를 위해서는 많은 경험과 장기 추시 결과를 요한다.

• Journal of the Korean Society of Propulsion Engineers
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• v.3 no.2
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• pp.10-17
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• 1999

This paper investigates the linear stability of both uniform and non-uniform density plane mixing layers with special emphasis on the effect of the wake component in the velocity profile. Velocity and density profiles for laminar flows are obtained from analytic profiles. Mixing layers with wakes have two generalized inflection points and two unstable modes-sinuous and varicose modes. For uniform density mixing layers, sinuous modes are more unstable than varicose modes, which shows wakes will be destabilized by sinuous modes. For non-uniform density mixing layers with high density in high speed flows, sinuous modes are more unstable than varicose modes. For non-uniform density mixing layers with high density in low speed flows, varicose modes can be more unstable than sinuous modes.

• Journal of Korean Society for Geospatial Information Science
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• v.15 no.2 s.40
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• pp.77-85
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• 2007

According to the survey data during the Japanese Occupation Period, the length of South Korea's coastline is about 11,542 km, including the coastlines of land and islands. It will be very expensive and time-consuming to revise/renew accurately this coastline data through site survey, it will cost great money and time. Also, various development projects such as reclamation works on public waters, constructions of ports/harbors, etc. are frequently changing the coastal areas and coastlines, causing many renewal projects on coastal maps. For such reason, appropriate alternatives for site survey are necessary. This paper demonstrate the utilization of RTK-GPS survey data, qualitative analysis and 3D topographic analysis for extracting the change in five coastal areas (Songjeong, Haeundae, Kwanganri, Songdo and Dadaepo). The local experimental areas subjected for this research were limited to five coastal areas near Busan.

• International Journal of Highway Engineering
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• v.10 no.3
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• pp.69-77
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• 2008

This article proposes new method for estimating pedestrian quality of service(QOS) that is useful to changing pedestrian environment by examining pedestrian quality of service as well as developing new method that integrate qualitative variables into the estimating indicators for the pedestrian movement right. Based on survey questionnaire addressed to experts group, the obtained data for the indicators were analyzed through Analytic Hierarchy Process(AHP). The results show that pedestrian traffic flow(quantitative figure: 52%), sidewalk geometric(quantitative figure: 16%), sidewalk usage behavior(qualitative figure: 11%) in commercial and business zone pointed out the importance of quantitative indicators such as pedestrian traffic flow, and sidewalk geometric. In addition, the results also show that pedestrian traffic flow(quantitative figure: 30%), sidewalk geometric(quantitative figure : 22%), sidewalk usage behavior(qualitative figure: 20%) indicate the significance of qualitative indicators such as pedestrian's sidewalk usage.

• The Journal of the Korea Contents Association
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• v.21 no.3
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• pp.80-87
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• 2021

Aging is rapidly progressing around the world. This study explore and propose a qualitative user research method to specifically understand the needs and desires of the elderly based on a human-centered design philosophy for design targeting the increasing elderly. In particular, the purpose of this study is to propose a user research method that can be easily used when designing products used by the elderly in the actual design site. For this purpose, this study examined the use and implications of using shadowing, interviews, and direct experience while actually proceeding with the walking stick design. The shadowing was organized through the AEIOU frame, and the interview was conducted by adding a significance category to reflect the recent trend of the silver generation. For the direct experience, design implications were derived by setting up four user behavior scenarios, each indoors and outdoors, and experiencing them directly by designers. This study is expected to be an important user research guideline in the current situation where the demand for design for the elderly is diversifying and increasing.

• Journal of Navigation and Port Research
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• v.45 no.3
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• pp.95-101
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• 2021

Marine Incidents based on Heinrich's law are very important in preventing accidents. However, marine Incident data are mainly qualitative and are used to prevent similar accidents through case sharing rather than statistical analysis, which can be confirmed in the marine Incident-related data posted in the Korea Maritime Safety Tribunal. Therefore, this study derived quantitative results by analyzing the causes of marine incidents during berthing using various methods of statistical analysis. To this end, data involving marine incidents from various shipping companies were collected and reclassified for easy analysis. The main keywords were derived via primary analysis using text mining. Only meaningful words were selected via verification by an expert group, and time series and cluster analysis were performed to predict marine incidents that may occur during berthing. Although the role of an expert group was still required during the analysis, it was confirmed that quantitative analysis of marine incidents was feasible, and iused to provide cause and accident prevention information.

• Journal of the Korean Society for information Management
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• v.29 no.4
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• pp.229-249
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• 2012

The study aims to analyze the notion of web navigation in library and information science (LIS) by investigating the concepts and its consequences. The analysis is based on 32 articles published in international LIS journals between 1995 and 2012. The study noted the changing contexts of information retrieval in the Web environment, and discusses the changes over time in the way in which the notion of navigation have been regarded. Three main concepts are identified: navigation behavior, navigation strategies, and navigation designs.