• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.121-123
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• 2021

영상처리는 인공지능과 스마트팩토리, IoT 산업 등 4차 산업혁명의 중요한 분야에서 다양한 형태로 사용되고 있다. 특히 물체 추적, 의료 영상, 객체 인식과 같은 데이터 처리가 필요한 시스템에서는 전처리 단계로 잡음 제거를 사용하고 있으나, 기존 알고리즘은 필터링 과정에서 블러링 현상이 나타나는 단점을 가지고 있다. 따라서 본 논문에서는 스위칭 퍼지 가중치를 사용한 필터 알고리즘을 제안한다. 제안한 알고리즘은 필터링 마스크의 표준편차에 저주파 영역과 고주파 영역을 구분하여 퍼지 함수를 스위칭하였으며, 퍼지 가중치에 따라 최종출력을 구한다. 제안한 알고리즘은 기존 방법에 비해 개선된 결과를 보였으며, 고주파 성분이 강하게 나타나는 영역에서 우수한 특성을 나타내었다.

• 패션비즈니스
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• 제27권5호
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• pp.78-92
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• 2023

Fashion trends are actively disseminated through social media, which influences both their propagation and consumption. This study explored how users perceive subversive basic fashion in social media videos, by examining the associated concepts and characteristics. In addition, the factors contributing to the style's social media dissemination were identified and its distinctive features were analyzed. Through text mining analysis, 80 keywords were selected for semantic network and CONCOR analysis. TF-IDF and N-gram results indicate that subversive basic fashion involves transformative design techniques such as cutting or layering garments, emphasizing the body with thin fabrics, and creating bold visual effects. Topic modeling suggests that this fashion forms a subculture that resists mainstream norms, seeking individuality by creatively transforming the existing garments. CONCOR analysis categorized the style into six groups: forward-thinking unconventional fashion, bold and unique style, creative reworking, item utilization and combination, pursuit of easy and convenient fashion, and contemporary sensibility. Consumer actions, linked to social media, were shown to involve easily transforming and pursuing personalized styles. Furthermore, creating new styles through the existing clothing is seen as an economic and creative activity that fosters network formation and interaction. This study is significant as it addresses language expression limitations and subjectivity issues in fashion image analysis, revealing factors contributing to content reproduction through user-perceived design concepts and social media-conveyed fashion characteristics.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제18권3호
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• pp.633-652
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• 2024

Software testing is an important phase as it ensures the software quality. The software testing process comprises of three steps: generation, execution, and evaluation of test cases. Literature claims the usage of single and multiple 'Unified Modeling Language' (UML) diagrams to generate test cases. Using multiple UML diagrams increases test case coverage. However, the existing approaches show limitations in test case generation from UML diagrams. Therefore, in this research study, we propose an approach to generate the test cases using UML State Chart Diagram (SCD), Activity Diagram (AD), and Sequence Diagram (SD). The proposed approach transforms UML diagrams into intermediate forms: SCD Graph, AD Graph, and SD Graph respectively. Furthermore, by integrating these three graphs, a System Testing Graph (STG) is formed. Finally, test cases are identified from STG by using a traversal algorithm such as Depth First Search (DFS) that is an optimization method. The results show that the proposed approach is better compared to existing approaches in terms of coverage and performance. Moreover, the generated test cases have the ability to detect faults at the unit level, integration, and system level testing.

• 한국콘텐츠학회논문지
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• 제21권4호
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• pp.795-814
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• 2021

최근 몇 년간 과학기술이 발달하면서, 기존의 건축양식과 디지털 도구가 결합하여 다양한 형태의 비정형 건축물을 구현하기 시작하였는데, 이러한 건축물은 기존의 정형 건축물과는 확연히 다른 형태를 보이고 있다. 디자이너는 비정형 건축물을 구축할 때 다양한 방법이나 디지털 도구를 활용하여 비정형 건축 형태와 보다 자유로운 건축 형식을 완성하게 된다. 이러한 배경을 바탕으로 비정형 건축형태 특성 평가 기준에 대한 연구의 필요성이 제기된다. 첫째, 본문은 비정형 건축물의 외부형태를 주요 연구 대상으로 하여, 선행연구를 바탕으로 비정형 외부 형태 요소를 고찰하고 통합하여 재구성하였다. 둘째, 본 연구의 목적은 다양한 비정형 형태의 유형을 분류하는 동시에 비정형 건축형태의 디지털 프로세스 디자인을 위한 중요한 기초자료를 제공하고자 하였다.셋째, 본문은 2000년부터 2020년까지 비정형 건축물을 주요 연구 대상으로 하고 있으며 그 형태 표현의 특징에 대한 심층적인 분석을 진행하였다. 관련 분야의 연구를 위한 사례 근거를 제공함과 동시에 비정형 건축물의 특징과 관련된 분포 법칙과 존재 가치를 모색하였다. 또한 본 연구에서는 건축물 기능적 용도의 분포와 결합하여 분석을 전개하였으며, 비정형 형태가 용도별로 건축물에 적용되고, 이러한 형태의 적용 추이를 파악하여 비정형 건축물의 형태에 대한 이해를 강화하고자 한 점에서 본 연구는 기존 연구와 차별화된다.

• 한국해양공학회지
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• 제21권2호
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• pp.22-34
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• 2007

We present basic data for developing new research topics and closely examine the existing data on the development and organization of the Nakdong River Estuary Delta by analyzing various studies of the area, including ocean engineering, coastal engineering, ocean environmental engineering, geomorphological, and geological studies. We first defined the general concepts related to the estuary and delta and reviewed the historical development of the Nakdong River Estuary Delta over the past 100 years. We then examined the origin and core elements of the estuary deposits that constitute the delta. In addition, we scrutinized the main factors affecting the development of the delta and analyzed existing research on delta development mechanisms by core researchers. The construction of an estuary barrage is one of the main factors effecting estuarine circulation and has altered the physical oceanic environment, area of deposition, atmospheric environment, and vegetation community of the delta. These factors affect the estuary circulation in turn, altering the delta. Along the Nakdong River, an unsteady-state sandy barrier appears at approximately three times the distance of the wavelength of incident offshore waves, and this terrain forms approximately 10-15 years after reclamation in the interdistributary upper stream and transforms the shoreline. It is necessary to develop a technique to predict terrain change that reproduces the erosion and accumulation of estuarine deposits. To determine the parameters and variables necessary to reproduce this system, continuous on-site monitoring is necessary. The existing research did not fully examine the terrain changes in Nakdong River Estuary or the periodic developmental characteristics. To understand the future process of estuary delta development, it is necessary to establish an integrated management system.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 춘계 학술발표회
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• pp.666-672
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• 2010

Load bearing capacity of new lattice girder has been evaluated with optimized spider for lattice girder utilized in the construction of tunnels. This newly developed lattice girder is different from existing lattice girder as its design is associated with existing spider with newly developed 2 types of form. The spacing of lattice girder's spider is linked with the weight and it decides the unit cost and construction therefore, different spacing of the developed spider has been produced to evaluate the measurement of load bearing capacity. As the result of the tests by producing the spacing of spider as 0cm and 4cm for developed lattice girder-2, the load bearing capacity of 0cm with spacing of 21%, and 4cm with 25% of increase when they are compared with the existing lattice girder, and the weight of specimen was decreased. As the result of the tests by producing the spacing of 1cm and 6cm for developed lattice girder-3, the spacing of 1cm with 42%, and the spacing of 6cm with 11% of increase which presented higher load bearing capacity in all newly developed forms, and there was a certain degree of increase in weight in case of 1cm of spacing. The result of evaluation regarding on the displacement by applying the evaluation method suggested by the German Railroad administration, the entire specimens were found to satisfy all the evaluation standard suggested by the administration.

• 대한가정학회지
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• 제27권1호
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• pp.19-27
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• 1989

The purpose of this study is to find at the basic data for the appropriate conditions of the pillows for the Koreans. In this study, the origins, materials, the forms and the sizes of Korean pillows have been investigated by means of existing remains and the existing documentary records. The results are as follows : 1) We can infer that ordinary pillows have already been used in a period of the three kingdoms, because the pillows for the dead bodies been unearthed from the tombs of this period. 2) Round pillows which are used nowadays to rest our heads have also been utilized as early as in Koryo Dynasty or even in the previous period. It is because the pillows described in Koryo dakeyung are similar to the present round ones. Most of the existing Koryo pillows have been made fo ceramics. Their average length is 20.0$\pm$5.4cm, the average low height is 9.7$\pm$0.9cm, and their average high height is 11.8$\pm$1.2cm. 3) The material which has been used to make pillows in Choson Dynasty is various : textile, wood, rush, bamboo, ceramics, etc. Most of them have been made in a round form or in a form of lying square. The average low height of lying squares is 8.1$\pm$2.5cm. The average high height is 11.9$\pm$1.9cm, and the average lenght is 19.0$\pm$5.6cm. The average diameter of embroidered pads attached to both sides of round pillows or the average length of one side of regular squares is 12.5$\pm$2.3cm.

• 한국건설관리학회논문집
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• 제12권4호
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• pp.139-148
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• 2011

u-City사업은 기존의 도시개발 사업과 달리 IT기술과의 융합을 통하여 진행된다. 따라서 기존의 개발사업의 비하여 더 많은 복잡성, 다양성을 내포하여 더 많은 위험요인들을 내제하고 있다. 이러한 리스크 요인들을 체계적으로 확인하고 정량화하여 관리, 통제할 수 있는 리스크 관리체계에 대한 필요하다. 특히 계획단계는 그 위험 요인이 다양한 형태로 나타나게 되어 사업의 성패에 많은 영향을 주는 단계이지만, 위험요인에 대한 관리는 소극적인 형식에 머물러 있다. 이러한 상황에서 리스크 요인들의 식별과 분석을 통한 리스크관리는 가장 필요한 요소이다. 따라서 본 연구에서는 u-City 사업의 지속적인 성장과 성공적인 수행을 위하여 계획단계에서의 문제점과 기존의 개발사업의 리스크 요인을 분석하여, u-City 계획단계에서 관리되어야 할 리스크 인자를 식별하고 이를 통계적 기법을 활용하여 리스크의 중요도, 발생확률, 발생영향에 따라 리스크 요인을 분석하여 정량화 하였다. 이를 통하여 우선적으로 관리되어야 할 핵심리스크 요인을 도출하였으며, u-City사업의 효과적인 리스크 관리를 위한 기초자료를 마련하였다.

• 복식문화연구
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• 제18권1호
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• pp.80-92
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• 2010

This research aims at developing the dress form for the aged women based on their body shapes using the three-dimensional body scan data with the body shape categorization(according to the previous research). To accomplish this goal, the sample group of representative body shape of the 50% of median was selected by using the high frequency proportion range of each type of body shape of the aged women, and the sample group of representative body shape of each type was averaged in a three-dimensional way by using the morphing method of a three-dimension reverse-engineered software. RP in the form of torso was produced based on the shape data of the final model and the data was formed into an actual object, by which an aged women's dress form model was drawn out. The differences of the girth of the bust, hip and waist between the developed dress form model and the existing dress form model were examined. The result showed that the developed dress form had a bigger size of waist girth than that of bust and hip girth, compared to the existing dress form, which shows that it reflects the aged women's tendency of abdomen obesity, so it's expected to be more proper for the human bodies of the targeted age group than the existing dress form. These research results may help design the clothing suitable for the body shape of the aged women so that their demand for the clothing of good fit will be satisfied in the future.

• 한국통신학회논문지
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• 제41권6호
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• pp.652-662
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• 2016

본 논문은 IP 기반의 통합 네트워크 환경에서 사용자가 단말을 변경해가며 서비스를 이용하고자 하는 경우에 끊김없는 서비스 이용이 가능한 사용자 이동성 관리 방안을 제안한다. 기존 이동성 기술들과 현재 진행 중인 대부분의 이동성 관련 연구들은 단말 이동성 지원에 집중되어 있어 다양한 유형의 이동성을 지원하기에 한계가 있다. 제안방안은 사용자 고유의 식별자인 UID(User Identifier)와 사용자가 이용하는 단말 고유의 식별자인 TID(Terminal Identifier) 간 매핑 관계와 사용자 고유의 영구적인 3계층 주소를 이용한 패킷 구성으로 사용자가 서비스 이용 중에 단말을 변경하더라도 세션이 유지될 수 있도록 한다. 제안방안에 의한 성능 향상을 검증하기 위해 수식을 이용하여 기존 사용자 이동성 방안과 제안방안의 핸드오버 시그널링 비용을 분석하고 비교하였다. 그 결과 제안방안이 기존방안 보다 더 나은 성능을 보임을 확인하였다.