• 대한가정학회지
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• 제45권9호
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• pp.37-52
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• 2007

This research developed maternity wear designed with a focus on the essential functions necessary for working women and adaptable to their body changes during pregnancy. Through Martin's anthropometry for 201 pregnant women, the size specifications for maternity wear was determined and a dress form was proposed, in order to provide the manufacturer with reference data and a prototype to verify their products' fit and suitability. From a monthly analysis on the body measurements of pregnant women, significant monthly differences and after pregnancy were found in weight, chest girth, bust girth, under bust girth, waist girth, and hip girth. Dress form was designed based on the average body measurements of women in their 6th to 10th month of pregnancy. The standard dimensions in the 8th month were 90cm (chest), 94cm (bust), 86cm (under bust), 97cm(waist: most protruding part on the side), and 99cm (hip). Compared with Japan's MAT-9 (for nine months), chest girth was the same, while the Korean waist girth and hip girth were larger by 2cm and 3cm, respectively. The woven fabric blouse was evaluated as having the best appearance, while the knitted fabric one was judged as being more comfortable it terms of functionality. For the pants, the design details of the lowered waist and curved waist belt were more functional. The tailored jacket was the best design for working women in terms of both looks and functionality. To summarize, maternity wear for working women, unlike general maternity clothes, should be designed with consideration for the wearer's somatotype and activity. Elastic materials were appropriate for functionality and dealing with physical changes. With the increasing of working pregnant women, such trials are expected to continue in this research area in order to develop functional maternity wear with multi-purposes such as breast-feeding, wearability after delivery and shielding from microwave.

• Current Optics and Photonics
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• 제2권6호
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• pp.532-539
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• 2018

Multiple LED arrays can be utilized in visible-light communication (VLC) to improve communication efficiency, while maintaining smart illumination functionality through dimming control. This paper proposes a modulation scheme called "Spatial Intensity Modulation" (SIM), where the effective number of turned-on LEDs is employed for data modulation and dimming control in VLC systems. Unlike the conventional pulse-amplitude modulation (PAM), symbol intensity levels are not determined by the amplitude levels of a VLC signal from each LED, but by counting the number of turned-on LEDs, illuminating with a single amplitude level. Because the intensity of a SIM symbol and the target dimming level are determined solely in the spatial domain, the problems of conventional PAM-based VLC and related MIMO VLC schemes, such as unstable dimming control, non uniform illumination functionality, and burdens of channel prediction, can be solved. By varying the number and formation of turned-on LEDs around the target dimming level in time, the proposed SIM scheme guarantees homogeneous illumination over a target area. An analysis of the dimming capacity, which is the achievable communication rate under the target dimming level in VLC, is provided by deriving the turn-on probability to maximize the entropy of the SIM-based VLC system. In addition, a practical design of dimmable SIM scheme applying the multilevel inverse source coding (MISC) method is proposed. The simulation results under a range of parameters provide baseline data to verify the performance of the proposed dimmable SIM scheme and applications in real systems.

• 복식문화연구
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• 제30권6호
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• pp.919-932
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• 2022

This study analyzed the trends of applications for patents, utility models, and designs related to leggings in order to understand the trend of development of technologies for leggings products that are continuously growing in the fashion market. In this study, trends in patent, utility model, and design applications related to leggings products filed from 2001 to 2020 with the Korean Intellectual Property Office were analyzed. As a result, first, the trends of applications for patents, utility models, and designs by year showed that the applications began to rise from 2006 and increased sharply in the 2010s. Second, applications for patents and utility models were analyzed by subject and, according to the results, the applications for compression shaping functionality were the most frequent, followed by those for construction/sewing, those for accessories and others, those for system/device, and those for multi-functionality. Third, when applications for designs were classified by target for wearing and by type of leggings, applications for general leggings designs were the most frequently filed, followed by applications for: item attachment type leggings, shapewear leggings, leggings for men, leggings for pregnant women, leggings for children, and leggings for the disabled. Although this study is limited to domestic patents, utility models, and design applications, it collected useful information related to leggings products and presented directions for future development.

• 한국정밀공학회지
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• 제33권3호
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• pp.235-242
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• 2016

The purpose of this study is an attempt to improve the functionality of a conventional Fused Deposition Modeling (FDM) process using the Automatic Tool Changer (ATC) to perform multimaterial production and post-processing. Hybrid-FDM means a fusion of an Additive Manufacturing process and grinding process using the ATC system. In order to enhance the potentiality of production capacity for multi-material fabrication and surface roughness improvement, two extrusion tools and one grinding tool system are suggested. A pneumatic chuck is attached on a moving platform in the XY axes plane and an extrusion head and grinding head are placed in a docking station, allowing for a quick changeover with each other. Therefore, the manufacturing lead time can be reduced efficiently for the fabrication of a product.

• 농촌계획
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• 제19권4호
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• pp.177-189
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• 2013

3D modeling and rendering technologies are getting more attention from landscape planners and architects because the virtual reality based on 3D graphic technology could give more realistic experience to landscape simulation users and boost promotional effects. The 3D landscape simulation, however, not only requires a lot of cost and time in production, but also demands efforts to distribute to consumers due to various computing environment of them. The purpose of this study is to suggest a process for developing an interactive 3D landscape simulator with low-cost, which can support multi-platform functionality in high quality through reviewing related current software and web services. We select GIMP for 2D image texturing, SketchUpfor 3D modeling, Unity for real-time rendering, and Google Earth for terrain modeling considering price and workability and apply the developed process for Windows, Web, and Android versions to test the applicability for Sangji-ri, Gosam-myeon, Gyeonggi-do, Korea.

• International Journal of Internet, Broadcasting and Communication
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• 제14권1호
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• pp.105-115
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• 2022

The platform for displaying cars has been changing with the times. From the popularity of paper media to the rise of computer graphics, the improvement of technology has brought more space and possibilities to the automotive industry. Yiming Zhong proposed the workflow of car configurator through Unreal Engine 4 to implement the basic functions of configuration in 2021, according to Yiming Zhong's final presentation, there is still room to improve the realism of graphics and functionality of the car configurator. Therefore, in this paper we propose to upgrade the car shaders and lighting environments according to the real-world physics and add multi-scenes switching function to car configurator. However the multi-scenes switching function also brings a large amount of data, which leads to the problem of display lag. At the end of the paper, we use the level of details(LOD) process to reduce the amount of data for real-time computing in Unreal Engine 4 and the increase of frames per second(FPS) values verifies the feasibility of our optimization solution.

• 한국지리정보학회지
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• 제1권2호
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• pp.67-79
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• 1998

대부분의 GIS 응용 프로그램은 다수의 공간객체에 대하여 주로 읽기 연산을 수행하며 접근하는 공간객체가 복합 객체인 경우 그 복합객체와 그 복합객체가 포함하는 공간객체에 모두 접근하게 된다. GIS 응용 프로그램에서 공간객체의 생성, 삭제, 변경연산은 매우 드물게 일어나지만 다수의 공간객체에 대하여 수행된다. 본 논문은 GIS 응용 프로그램의 이러한 특성을 고려하여 다수의 공간객체들을 신속히 탐색하기 위한 다단계 사전인출 질의의 개념을 제시하고 생성하는 영속객체들을 최적의 성능으로 데이타베이스에 반영하기 위한 지연쓰기 기능을 객체지향 데이타베이스 시스템인 바다-III에 설계하고 구현한 내용을 제시한다. 다단계 사전인출 질의는 그 질의를 만족하는 객체들뿐만 아니라 그 객체들이 포함하는 객체들을 사용자가 명시한 단계만큼 데이타베이스로부터 인출하여 클라이언트 캐쉬에 등록하는 기능이다. 지연쓰기 기능은 응용 프로그램이 생성한 객체들에 대하여 서버의 부담을 최소화하고 클라이언트와 서버간의 통신을 최소화하면서 데이타베이스에 반영하는 기법이다. 이들 두 기능은 GIS 응용과 같이 다수의 복합객체를 탐색하고 생성하는 응용에 적합하다.

• 한국실내디자인학회논문집
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• 제20권4호
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• pp.74-82
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• 2011

All the phenomena and subjects of nature and society are within correlation interconnection, and they are inseparably connected one another. The elements of this interaction can be found out through the concept of transparency in the space composition of Korean traditional architecture. This study is focusing on the access space, in other words, a gate-house that is a buffer zone playing a process role up to the main space among successive spaces. It was chosen to be the subject of the study since it strengthens convergence into the main building and with the effect connecting spaces, it could show well the spatial possibility of transparency. Besides, the subject of the study is limited to the Moonru Multi roofs that improves the functionality of spaces between gate-houses, and it is intended to progress contents by comparative analysis of two kinds such as Seo Won gate-house and temple gate-house. Korean traditional architecture places emphasis on harmony within the whole spaces. There are intimate relations between surrounding environment, external spaces and internal spaces, and it is important understand the spatial relations according to the shape appearing through interactions of parts in the whole spaces. In conclusion, the Moonru Multi roofs is analyzed with the method of extracting the concept that is contained in the frame of analysis and through ecological views through a visible and structural method. It can be understood what kinds of method for communication were used for ancestors to recognize and use spaces with the deduced concept through the analysis of the Moonru Multi roofs with different character.

• 한국멀티미디어학회논문지
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• 제7권11호
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• pp.1580-1587
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• 2004

현재 다중링크 연결을 지원하는 가상사설망(VPN: Virtual Private Network) 장비들은 연결된 다중링크를 회선 장애 발생 시 회선간의 전이 기능을 위한 것으로만 활용한다. 전이 방식으로 장애가 발생할 경우를 대비하는 것은 하나의 회선을 이용하지 못하는 것을 의미한다. 물리적인 VPN회선은 두 개지만 실제 사용은 하나만 하게 되는 것이다. 이에 따라 데이터 전송량이 많은 경우에는 전송 속도가 결과적으로 늦어지게 되고, 나아가 응용들의 요구 조건을 모두 수용할 수 없게 된다. 본 논문에서는 다중링크를 모두 이용하는 가상사설망을 형성하고, 회선간의 부하균등을 기함으로써 회선의 활용도를 크게 높여 결과적으로 가상사설망의 대역폭을 높이는 효과를 얻을 수 있는 기법을 제안한다. 뿐만 아니라 회선 장애가 발생하였을 때는 기존의 가상사설망 장비가 시행하는 회선 전이 기술을 함께 적용하였다. 결론적으로 다중링크로 연결되어있는 가상사설망의 가용성을 유지하면서 대역폭을 크게 높이는 효과를 얻을 수 있었다.

• KNOM Review
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• 제22권1호
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• pp.60-67
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• 2019

Graphical Processing Units(GPUs)는 비교적 정형화된 연산을 병렬적으로 처리함으로써 높은 성능을 제공한다. 기술의 발전에 따라 GPU 환경에서 다양한 응용 실행을 시도하는 General Purpose GPU(GPGPU) 실행환경이 연구되고 있으나, 자원 분배, 스케줄링 등의 GPU 자원을 효율적으로 사용하기에는 아직 제한적이다. 최신의 GPU 구조들은 커널의 동시 실행을 지원하지만 같은 응용 안에서만 동시 실행이 가능하다는 문제점이 있어 NVIDIA는 Multi-Process Service(MPS)를 제안하였다. MPS는 다른 응용에 속한 커널도 동시 실행할 수 있도록 서비스한다. 하지만 응용의 실행 특성 및 동시 실행되는 패턴이 미리 파악되어 있지 않으면 MPS 장점을 최대한으로 취할 수 없다. 본 논문에서는 응용 프로파일링을 통해 응용의 특성을 파악하고, 동시 실행 스케줄링 알고리즘을 적용하여 실험을 진행하였다. MPS의 장점을 최대한으로 활용하기 위해서는 함께 돌릴 응용의 특성을 파악하고, 프로파일링을 통해 동시 실행하는 응용들의 순서를 제어하는 스케줄링 알고리즘이 중요함을 보인다.