• The Journal of Korean Institute of Communications and Information Sciences
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• v.24 no.6A
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• pp.855-863
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• 1999

Recently a number of multi-rate CDMA systems have been proposed for the third generation mobile communication system. Multi-Code CDMA (MC-CDMA) offers the system construction advantage of being able to use a single-rate receiver. But MC-CDMA suffers from the distortion due to the nonlinearity of the power amplifier. In this paper, we analyze the effect of the nonlinearity on the bit error rate performance of MC-CDMA systems. A polynomial model is used to represent the amplifier amplitude nonlinearities.

• Journal of the Korea Fashion and Costume Design Association
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• v.4 no.2
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• pp.69-83
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• 2002

The purpose of this paper was to analyze the meanings and issues which had been expressed through the domestic fashion magazine from 1998 to 2002. The natural intension issue was caused by rapid development of modern civilization and it kneaded with poison of ecosystem destruction. It was expressed by pure and clean fashion image, simple appearance and natural color. The reconciliation issue between the east and west country, man and woman and science and art which are opposed together of the trade by mixture of fashion was expressed became the paternity. It pursued a tradition and the past, which pursue new things and the specific charters with spouted, and intension is expressed. The issues of over all fashion purses human being's happiness for which fashion design have existed and changed.

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.134-137
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• 2003

탄소섬유나 활성탄소섬유(activated carbon fiber, ACF)는 일반적으로 출발물질에 따라 polyacrylonitrile(PAN)계, 아크릴(acryl)계, 피치(pitch)계, 페놀(phenol)계 등으로 분류할 수 있다. 보통 습식, 용융 혹은 용융분사(melt-blown) 방사 방법에 의해 섬유 형태로 형성한 다음 산화성 가스 분위기에서 불융화 과정을 거쳐 열에 대한 안정성을 부여하여 불활성 분위기에서 탄소화하여 탄소섬유를 제조하거나, 수증기나 이산화 탄소와 같은 산화성 분위기에서 활성화하여 활성탄소섬유를 제조한다. (중략)

• Proceedings of the Korean Society of Computer Information Conference
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• 2008.06a
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• pp.291-295
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• 2008

오늘날 정보기술(IT)은 다양한 산업분야 융화되어 기존 산업의 경쟁력을 강화하고 생산성 및 품질 향상의 견인차 역할을 수행하고 있다. 특히 생산 및 물류 분야에서 IT 융합을 통한 새로운 시너지 창출을 시도하고 있는 것이 RFID 기술이라 할 수 있다. 이미 정부 주도의 시범사업이 끝났으며, 2008년 공공기간 확산사업이 성공적으로 마무리되면, 본격적으로 산업분야 확산이 기대되고 있다. 본 논문에서 자동차 산업에서의 RFID 응용 모델로서 RFID 기반 지능형 직서열 생산시스템의 설계 및 구현에 대하여 기술한다. 직서열 시스템은 완성차 생산라인의 조립시간과 순서에 맞춰 모듈과 부품을 공급하는 협업 생산시스템이다. 자동차 조달물류 프로세스 혁신을 위하여 RFID 기술을 도입함으로써 협력기업간 정보 교환을 원활하게 지원하며 실시간 추적관리 체제의 구현을 이루고자 한다. 본 논문에서 제안하는 시스템은실시간 재고 파악 및 생산물량 예측이 가능하며, 이기종 부품 장착에 의한 조립불량률을 현저히 줄일 수 있는 장점이 있다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.705-706
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• 2021

본 연구에서는 4차 산업기술에 대한 소비자들의 인지 정도를 살펴보고 이러한 기술들이 향후 인간의 삶에 미칠 위험에 대해 어떻게 지각하는지를 탐색하고자 한다. 즉, 4차 산업기술로 대표되는 5G, 블록체인, 인공지능, 10기가 인터넷, 증강현실·가상현실, 사물인터넷, 양자 컴퓨팅 등이 인간의 삶을 이롭게 할 것이라 믿는지에 대한 의문에서 출발한다. 분석결과, 7가지 신기술 중 10기가 인터넷과 양자 컴퓨팅을 제외한 5G, 블록체인, 인공지능, 증강현실·가상현실, 사물인터넷 등에 대한 소비자들의 인지 정도가 높을수록 해당 기술의 위험지각은 낮아지는 것으로 나타났다. 본 연구는 4차 산업기술이 우리의 소비생활에 보다 잘 융화될 수 있도록 하는 정책적 단초를 제공할 것으로 기대된다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.673-674
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• 2021

본 논문은 집중력 향상 놀이인 다른 그림 찾기를 자신이 좋아하는 주제를 배경으로 쉽게 생성할 수 있는 시스템을 제안한다. 아동기에 주로 진단이 되고 성인기까지 이어질 수 있는 주의력 결핍 과다활동 증후군(ADHD)을 조기에 예방하기 위해 본 논문에서는 선택한 그림의 일부분을 가지고 생성적 적대 신경망을 활용하여 새로운 물체를 생성해 낸 뒤 자연스럽게 원본 그림에 융화될 수 있도록 하는 것이 목표이다. 하나의 다른 그림 찾기 콘텐츠를 만드는 것은 포토샵과 같이 전문성을 가진 툴을 전문가가 오랜 시간 작업해야 하는 내용이다. 전문적인 기술이 필요한 작업 과정을 본 연구를 통해 일반인도 쉽게 작업할 수 있도록 하는 것을 최종 목표로 한다.

• Asian Journal of Turfgrass Science
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• v.23 no.1
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• pp.163-176
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• 2009

Investigating endophyte distribution, naturally occurring in native grasses, is important for understanding endophyte-grass associations and using the beneficial effects of endophytes in cultivated plants. The goal of this study was to investigate endophytes from natural Festuca spp. in Yunnan, Guizhou, and Sichuan Provinces of China, and to study the compatibility between the endophytes and turf type tall fescue (Festuca arundinacea) which is widely used for lawn and athletic fields in that region. Of 628 accessions in F. ovina, 421 had endophytes identified in leaf sheath from on-site microscopic examination. From Festuca spp, three isolates were obtained from the seeds and ninety isolates were obtained from seedlings established from the collected seeds. The isolates from F. ovina and F. stapfii were tentatively identified as Neotyphodium typhinum and Neotyphodiumstarii, respectively. We tested compatibility of the two fungal species with seven tall fescue cultivars, Little Hero, Sub Boy, Eldorado, Arid III, Millennium, Crossfire, and Fawn. N. typhinum or N. starii did not infect 'Fawn' with either seed injection or seed soaking method. The highest infection rate byboth N. typhinum and N. starii was in 'Sun Boy' and 'Eldorado'. There were significant interaction effects between tall fescue cultivar and type of endophyte on infection.

• Proceedings of the CALSEC Conference
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• 1998.10a
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• pp.27-43
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• 1998

Recently, most corporations in Korea need to construct new management system for overcoming economic crisis. Firstly, this paper suggests “Value Creation system”. Secondly, this paper suggests CALS as strategic substitute to achieve market efficiency, capital efficiency, personal efficiency, and operation efficiency, which are four critical factors of “Value Creation system”. Korean corporations should build new business model founded on cooperation by completing CALS system and reconstruct competitive management system by using knowledge and know-how accumulated in that process. Because most corporations keep exclusive corporate culture and little experience of cooperative relationship among businesses, strategic approaches are essential for construction of CALS. These are vertical integration, organization of CALS construction teams, concurrent development of product/process, CEO's iron will, Precise vision and strategies, and education/training of participant.

• Journal of Families and Better Life
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• v.29 no.5
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• pp.33-50
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• 2011

This study aims to examine experiences of adoptive families, mainly focusing on mothers with their biological children and adopted a child, through a phenomenological approach. The subjects of this study are adoptive family's mothers with their biological children according to a criterion-based selection. 15 mothers who adopted children under 12 months, who are currently aged over 6, are selected and given personal and in-depth interviews, questions ranging from the process before adoption, foster care and changes in family relationships to the issues caused by adoption and coping methods. 6 steps of a phenomenological method that Colaizzi(1978) proposed are applied to analyze the data. The results of this study are as follows. The central theme of this study is 'A family which has harmonized with love beyond blood ties'. First, the participants have shown difficulties in different aspects over adoption than those of sterile families. The motive of their adoption is to let adopted children experience a happy childhood in a loving family. Secondly, the participants have adjusted themselves to new adoptive families, have committed to the care of their new children, and have experienced a change in family relationships. Finally, adoptive families have successfully been settled while overcoming difficulties together.

• Journal of the HCI Society of Korea
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• v.4 no.2
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• pp.1-8
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• 2009

User-centered design aims to develop device naturally without the interference of user' s conscious and unconscious behavior. Accordingly, designers need to understand their user's requirements, observe user behavior and interaction in the real environment. However, existing observations suggested a vast range of analysis system and observation techniques which are often ambiguous to the designers. Therefore, this research is aimed to propose an observation system for collecting data from user's behavior. In order to do so, we define the components and behavior level within the context of driving.