• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.251-253
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• 2003

Landsat images were globally used to monitoring the Earth's. But it is not positively applied to a field of environment such as coastal environment, heat island effect and drought condition and so on. Until recently, Information about a ecology natural environment came to do by direct investigation. But Information about a ecology·natural environment of wide area were quickly getting possible with the progress of remote sensing technique. Specially, the up-to-date characteristic information about an ecology·natural environment as the basic intelligence for a country development activity are very important. So, it applies the satellite images that the periodic observation of data is possible. In this study, We planned the function which is possible helping the renewal of an ecology·natural environmental information using Landsat imagery. Also planned the DB suitable for these purpose. For application of thermal infrared band images we developed the function that extracts an isothermal line. It used the thermal infrared band images and it grasped a temperature distribution. The result is useful in analysis of the city heat island effectiveness.

• Investigative Magnetic Resonance Imaging
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• 제16권2호
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• pp.124-135
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• 2012

목적: 본 연구에서는 숙달된 택시운전기사들을 대상으로 내비게이션 시스템을 이용하여 운전하는 한국인 대조군에 비교하여 해마의 부피와 모양 그리고 기능적 변화를 알아보고자 하였다. 대상과 방법: 총 8명의 대상군(4명의 숙달된 택시운전기사들과 4명의 같은 나이대 일반인 대조군)에 대해 삼차원 T1강조영상과 혈류산소 수준에 따른 기능성 자기공명영상을 촬영하였다. 해마의 용적과 모양, 기능성 자기공명영상 자료를 분석하여 두 군간에 신경 활성도 차이를 비교하였다. 결과: 해마의 용적은 두 군간에 통계적으로 유의한 차이를 보이지 않았다(p > 0.05). 해마의 모양을 보면, 택시운전기사군의 왼쪽 해마가 대조군에 비해 전체 길이가 약간 길고 머리와 꼬리부분이 약간 더 컸다(p < 0.05, uncorrected). 기능성 자기공명영상에서는 택시운전기사군에서 대조군에 비해 방추상회가 특히 활성화되어 있었다. 결론: 택시운전기사군의 해마가 보이는 이러한 구조적, 기능적 변화는 그들의 직업과 관련하여 공간적 탐색능력을 지속적으로 사용하면서 해마와 관련 뇌영역이 기능적으로 분화했음을 나타내는 소견으로 추측할 수 있겠다.

• 복식문화연구
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• 제15권3호
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• pp.420-430
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• 2007

Noting that there is an increasing trend of the so-called 'neo-single life style' among women these days, this research aims to make a product development for these neo-single women in this era of families of a single member by analyzing their concepts and characteristics. We payed a particular attention to the data from such sources as newspapers, magazines or the articles in the Internet. The essence of our research lies in the analysis of target market, in the suggestions in the brand planning and product development and in the designs of fashion and interior products for them. The result of this research is as follows. First, it turns out that these neo-single women enjoy a kind of multi-mixing code lifestyle rather than showing a preference for a particular brand. For this reason, we have decided to pursue a multi-concept brand fonn as a right direction for brand planning for them. Second, as for a philosophy behind the brands, we suggest a concept of 'small utopia' for neo-single women and express such as new aristocracy, happiness and pleasure. Third, we adopt 'YOU' as the name of the brand as it reflects their various life styles and characteristics. Fourth, as for the product development of F/W in 2007, we have decided on 'Minimal Natural' as it mixes up the concepts of the controlled beauty of sophistication and multi-functional elements and 'Modern Primitive' as it expresses the ethnic elements on modern images having craft factors and modern images. We have performed concrete tasks in creating images, coloring, making fabrics for each theme. Fifth, we have chosen and suggested other products that are suitable for these neo-single women who seek for multi-functional but simple kinds after surveying a wide range of products in magazines or in the Internet.

• 한국병원경영학회지
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• 제24권1호
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• pp.36-47
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• 2019

Purposes : The purpose of this study is to analyze empirically the consturct development of brand trust in dental clinic service and its influence on both satisfaction and brand loyalty of clinic users in Seoul area. Methodology : To test the hypotheses, the structured instrument was employed to question to patients and their guardians who had used dental clinics in the metropolitan area. 207 cases were analyzed with structural equation method through SPSS 18.0 and AMOS 22.0, and findings of the test as follows. Findings : Firstly, both functional and associative images had a positive impact on the brand trust. Especially we found the influence of functional images was greater than that of the brands' associative images. Secondly, the satisfaction of dental clinic users had greater positive influence on the clinics with greater trust. Thirdly, the higher the satisfaction of health service consumers, the more positive effect on brand loyalty. This relationship between the satisfaction of dental clinic users and brand loyalty match the findings of previous studies on relations of similar variables. Practical Implications : This study shows that with greater satisfaction, the referral rate and the revisit rate of users would increase. This implies that dental clinics need to take appropriate actions to build brand trust with advertising and/or PR strategies for a good brand image. It would be necessary to research further expected variables that influence users' brand loyalty in the service, such as the dentists' level of expertise, their relationship level with customers, the quality of dental services and et al..

• 복식문화연구
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• 제15권5호
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• pp.770-780
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• 2007

Caports is a fusion style which consists of mix and match and various T.P.Os. The expressive features of Caports style have been strengthened by the combination of functional and decorative design. This study aims to divide the images into categories and to study the decorative features of each category. It is classified into five groups according to its images, Healthy & Sexy, Athletic, Romantic, Girlish, Vintage. The following study has assorted the pictures of Caports style into categories and presents decorative design features in each category. Analyzed materials have been collected from fashion magazines, catalogs, and fashion related Internet sites from 2002 to 2006. The dominant feature of caports was sensitive fashionableness as a day wear based on sportswear. This feature was determined by every factor such as materials, structure and details. In other words, the usage of jersey that could give functionalities and elasticity, structure that exhibit one's silhouette and the decorative designs of functional details make it possible to have this kind of peculiar style. Decorative designs shown in sports wear, casual wear and women's wear were all applied in Caports style. They showed a moderate and coherent style rather than one that was richly ornate or magnificent. So, in the mesa trend of "sportism", Caports style could easily fit into the 21st century's consumers' demands for fusion. And this study of decorating methods of each category of Caports style may provide useful data to help develop the products that consumers demand.

• 대한의용생체공학회:의공학회지
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• 제30권5호
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• pp.373-380
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• 2009

In general, Independent component analysis (ICA) is a statistical blind source separation technique, used either in spatial or temporal domain. The spatial or temporal ICAs are designed to extract maximally independent sources in respective domains. The underlying sources for spatiotemporal data (sequence of images) can not always be guaranteed to be independent, therefore spatial ICA extracts the maximally independent spatial sources, deteriorating the temporal sources and vice versa. For such data types, spatiotemporal ICA tries to create a balance by simultaneous optimization in both the domains. However, the spatiotemporal ICA suffers the problem of source ambiguity. Recently, constrained ICA (c-ICA) has been proposed which incorporates a priori information to extract the desired source. In this study, we have extended the c-ICA for better analysis of spatiotemporal data. The proposed algorithm, i.e., constrained spatiotemporal ICA (constrained st-ICA), tries to find the desired independent sources in spatial and temporal domains with no source ambiguity. The performance of the proposed algorithm is tested against the conventional spatial and temporal ICAs using simulated data. Furthermore, its performance for the real spatiotemporal data, functional magnetic resonance images (fMRI), is compared with the SPM (conventional fMRI data analysis tool). The functional maps obtained with the proposed algorithm reveal more activity as compared to SPM.

• 대한전자공학회논문지SD
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• 제47권5호
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• pp.56-70
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• 2010

현실감 있는 3차원 그래픽 영상을 지원하기 위해서는 3차원의 그래픽 데이터를 기반으로 사실감을 부여하여 2차원 영상을 생성하는 렌더링 기술과 방대한 양의 데이터에 대해 복잡한 연산을 효율적으로 처리할 수 있는 고성능 그래픽 프로세서가 요구된다. 이로 인해 그래픽 하드웨어는 급속히 발전하였고 기존에 실시간 처리가 불가능했던 여러 고급 렌더링 효과들을 가능하게 하고 있다. 과거에 비해 셰이딩 기술이 발전하면서 사실적인 영상의 렌더링이 가능하게 되었으나 아직 많은 계산 시간을 필요로 하고 있다. 실사와 같은 영상을 빠르게 처리하기 위해서 그래픽 프로세서는 많은 데이터에 대해 복잡한 부동소수점 연산을 효율적으로 처리 할 수 있도록 다수의 연산유닛이 집적되는 방향으로 발전하고 있다. 본 논문에서는 프로그램어블 통합 셰이더 프로세서에서 고성능 3차원 컴퓨터 그래픽 영상을 지원하기 위해 특수 함수 유닛을 설계하고 구현하였다. 설계한 특수 함수 유닛에 대해 기능적 레벨의 시뮬레이션을 하여 동작을 검증 하였으며, FPGA Virtex-4(xc4vlx200)에 구현하여 하드웨어 리소스 사용율과 동작속도를 확인 하였다.

• 한국임상수의학회지
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• 제27권5호
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• pp.559-564
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• 2010

인의학에서 비루관의 기능적 폐쇄 검사에서 유용하게 사용되는 비루관신티그라피 검사를 정상 비글견에 적용하여 그 유용성을 알아보고자 하였다. 누비공신티그라피는 정상적인 비루관 개통이 임상적으로 확인된 6마리 비글견에서 시행하였다.정면상의 양측 눈을 100초 동안의 타임세팅으로 한 후 5분, 10분, 20분 영상을 얻고자 하였다. 20분영상에서 누관의 개통이 관찰되지 않으면 30분. 45분. 60분 지연 영상을 얻었다. 신티그라피 이후 획득한 각 영상에서 좌측, 우측의 눈물세관, 누낭, 비루관의 관심영역 (ROI)를 그린 후 각 각의 계수율을 측정한 후 시간별 계수율 표를 구하였다. 20분 내 개통률은 전체 12개 비루관 중 10개를 나타내어 검사개체 중 83.3%를 나타내고 있으며 30분내 개통률은 12개중 11개를 나타내어 개통률은 91.6%이다. 정상 개에서 누비공신티그라피의 영상은 개 비루관의 해부학적, 기능적 누도폐쇄의 진단법으로 유용하다고 판단되며 임상적인 연구에 기초자료로 활용될 수 있을 것으로 판단된다.

• 한국의학물리학회지:의학물리
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• 제30권1호
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• pp.22-31
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• 2019

Purpose: To develop a new diffusion-based functional MRI (fMRI) sequence to generate apparent diffusion coefficient (ADC) maps in single excitation and evaluate the contribution of b0 signal on neuronal changes. Materials and Methods: A diffusion-based fMRI sequence was designed with single measurement that can acquire images of three directions at a time, obtaining $b=0s/mm^2$ during the first baseline condition (b0_b), followed by 107 diffusion-weighted imaging (DWI) with $b=600s/mm^2$ during the baseline and visual stimulation conditions, and another $b=0s/mm^2$ during the last activation condition (b0_a). ADC was mapped in three different ways: 1) using b0_b (ADC_b) for all time points, 2) using b0_a (ADC_a) for all time points, and 3) using b0_b and b0_a (ADC_ba) for baseline and stimulation scans, respectively. The fMRI studies were conducted on the brains of 16 young healthy volunteers using visual stimulations in a 3T MRI system. In addition, the blood oxygen level dependent (BOLD) fMRI was also acquired to compare it with diffusion-based fMRI. A sample t-test was used to investigate the voxel-wise average between the subjects. Results: The BOLD data consisted of only activated voxels. However, ADC_ba data was observed in both deactivated and activated voxels. There were no statistically significant activated or deactivated voxels for DWI, ADC_b, and ADC_a. Conclusions: With the new sequence, neuronal activations can be mapped with visual stimulation as compared to the baseline condition in several areas in the brain. We showed that ADC should be mapped using both DWI and b0 images acquired with the same conditions.

• 대한의용생체공학회:의공학회지
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• 제28권4호
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• pp.471-476
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• 2007

Various active microwave imaging techniques have been developed for cancer detection for past several decades. Both the microwave tomography and the UWB radar techniques, constituting functional microwave imaging systems, use the electrical property contrast between normal tissues and malignancies to detect the latter in an early development stage. Even though promising simulation results have been reported, the understanding of the functional microwave imaging diagnostics has been relied heavily on the complicated numerical results. We present a computationally efficient and physically instructive analytical electromagnetic wave channel models developed for functional microwave imaging system in order to detect especially the breast tumors as early as possible. The channel model covers the propagation factors that have been examined in the previous 2-D models, such as the radial spreading, path loss, partial reflection and transmission of the backscattered electromagnetic waves from the tumor cell. The effects of the system noise and the noise from the inhomogeneity of the tissue to the reconstruction algorithm are modeled as well. The characteristics of the reconstructed images of the tumor using the proposed model are compared with those from the confocal microwave imaging.