• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 가을학술발표대회논문집
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• pp.237-238
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• 2023

Urbanization and the increase in building scale have amplified the complexity of M.E.P design. Traditional design methods face limitations when considering intricate pathways and variables, leading to an emergent need for research in automated design. Initial algorithmic approaches encountered challenges in addressing complex architectural structures and the diversity of M.E.P types. However, with the launch of OpenAI's ChatGPT-3.5 beta version in 2022, new opportunities in the automated design sector were unlocked. ChatGPT, based on the Large Language Model (LLM), has the capability to deeply comprehend the logical structures and meanings within training data. This study analyzed the potential application and latent value of LLMs in M.E.P design. Ultimately, the implementation of LLM in M.E.P design will make genuine automated design feasible, which is anticipated to drive advancements across designs in the construction sector.

• 한국통신학회논문지
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• 제37권3A호
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• pp.151-156
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• 2012

본 논문에서는 시공간 비트 인터리브된 부호화 변조 시스템에서 최대 다이버시티를 가지기 위한 준순환 저밀도 패리티 검사 부호의 설계 방안을 제안한다. 제안된 부호가 최대 다이버시티를 가지기 위해서는 부호의 시스템 성분에 해당하는 부분행렬이 가역행렬이라는 필요충분조건을 제시하고 이를 증명한다. 또한 이진 가역 행렬의 새로운 생성 방법을 제안하고 이를 시공간 비트 인터리브된 부호화 변조 시스템 내의 준순환 저밀도 패리티 검사 부호에 활용하기 위한 방법을 기술한다.

• Journal of electromagnetic engineering and science
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• 제13권1호
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• pp.28-33
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• 2013

This paper proposes a miniaturized high-isolation diversity antenna for wearable wireless body area network (WBAN) applications. An inverted-F type radiating element is used to reduce the overall dimension of the proposed antenna to $30mm{\times}30mm{\times}2.5mm$. The antenna performance on the human body phantom is analyzed through simulation and the performance of the fabricated antenna is verified by comparing the measured data with that of the simulation when the antenna is placed on a semi-solid flat phantom with equivalent electrical properties of a human body. The fabricated antenna has a 10 dB return loss bandwidth over the Industrial Scientific Medical (ISM) band from 2.35 GHz to 2.71 GHz and isolation is higher than 28 dB at 2.45 GHz. The measured peak gain of antenna elements # 1 and # 2 is -0.43 dBi and -0.54 dBi, respectively. Performance parameters are analyzed, including envelope correlation coefficient (ECC), mean effective gain (MEG), and the MEG ratio. In addition, the specific absorption ratio (SAR) distributions of the proposed antenna are measured for consideration in use.

• 대한전자공학회논문지TC
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• 제46권7호
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• pp.1-5
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• 2009

랜덤 빔 형성 기법은 정적인 채널에서 다중 사용자 다이버시티를 얻게 하지만, 사용자수에 따른 성능의 제약이 있다. 이를 극복하기 위해 송신단에서 다중 랜덤 빔을 형성하는 기법들이 소개되었다. 특히 코드북에 기반을 둔 랜덤 빔 형성 기법은 적은 파일럿 수로 다중 랜덤 빔을 형성한다. 그러나 그 기법은 채널특성에 따른 빔 디자인의 어려움이 있다. 따라서, 본 논문에서는 다중 코드북을 교대로 이용하여 랜덤 빔을 형성하는 기법을 제안한다. 제안한 기법은 기존 기법에 비해 휠씬 용이하게 빔을 디자인하여 적은 파일럿을 이용하면서 다중 사용자 다이버시터 이득과 선택적 다이버시티 이득을 동시에 얻는다.

• Weed & Turfgrass Science
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• 제2권3호
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• pp.230-235
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• 2013

Amaranths (Amaranthus sp.), an endemic American crop, are now grown widely across the world. This study used 14 simple sequence repeat (SSR) markers to analyze the genetic diversity of 74 amaranth accessions from the United States, with eight accessions from Australia as controls. One hundred twenty-two alleles, averaging eight alleles per locus, were observed. The average major allele frequency, expected heterozygosity, and polymorphism information content (PIC) were 0.44, 0.69, and 0.65, respectively. The structure analysis based on genetic distance classified 77 accessions (94%) into three clusters, while five accessions (6%) were admixtures. Among the three clusters, Cluster 3 had the highest allele number and PIC values, while Cluster 2 had the lowest. The lowest FST was between Clusters 1 and 3, indicating that these two clusters have higher gene flow between them compared to the others. This finding was reasonable because Cluster 2 included most of the Australian accessions. These results indicated satisfactory genetic diversity among U.S. amaranths. These findings can be used to design effective breeding programs involving different plant characteristics.

• 한국전자파학회논문지
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• 제14권11호
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• pp.1134-1142
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• 2003

본 논문은 STS(Space Time Spreading) 다이버시티 기능을 지원하는 시스템을 FPGA(Field Programmable Gate Array)를 이용하여 구현하고, 이 시스템을 구성하고 있는 각 모듈의 기능과 실제 설계 방법을 소개한다. 본 논문에서 구현한 개루프 전송 다이버시티 시스템인 STS 시스템의 성능을 개선하기 위해서는 페이딩 환경에 따라 변화하는 통신채널의 정확한 검출이 필수적이다. 이를 위하여 파일럿 패널의 정확한 검출을 위한 최적의 망각인자(Forgetting factor)를 제안한다. 본 논문에서 구현한 STS 시스템과 컴퓨터 시뮬레이션을 통하여 CDMA2000 1x 신호환경에서 STS 시스템 적용시 도플러 주파수 80 Hz일 경우에 0.7의 값을 가지는 망각인자를 사용하여 각 구간의 페이딩을 검출함으로써 파일럿 신호의 전력이 충분하지 않을 경우에도 적분 구간을 많이 늘릴 필요 없이 파일럿 채널을 검출할 수 있음을 알 수 있었다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2000년도 추계학술발표논문집 (하)
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• pp.1263-1266
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• 2000

본 논문에서는 Decision Feedback Equalization(DFE)과 다이버시티 기법을 접합하여 영상전송시스템을 구현하였다. 제안된 시스템은 기존의 DFE를 변형시키지 않고 다이버시티 기법을 도입함으로서 보다 간단한 형태를 나타내면서 시스템의 성능을 향상시킬 수 있었다. 또한 본 연구에서 JPEG의 특징인 블록단위의 손상에 대응하여 좀 더 나은 영상품질과 시스템의 속도를 위하여 주파수 영역에서의 블록 보간법을 포함하고 있다. 제안된 시스템의 성능분석을 위하여 세 가지 다이버시티 기법의 경우와 등화기 탭 수의 변화 및 채널의 변화에 따른 컴퓨터 시뮬레이션을 사용하였다.

• 아태비즈니스연구
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• 제12권1호
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• pp.87-100
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• 2021

Purpose - This study aims to examine the antecedents of willingness to pay in the domain of duty free shop. Design/methodology/approach - This study chooses willingness to pay as explained variable. The candidates of explanatory variables are price fairness, brand awareness, employee service, product diversity, and crowding. This study uses survey to explore the linear relation between variables. This research collected data using online panel data collection service. The number of valid observation is 265. The research targe is Lotte duty free store. Statistical analysis was for statistical inference. To attain the information of survey respondents, frequency analysis is employed. Next, this study implemented exploratory factor analysis and reliability to ensure both validity and reliability of measurement items. This study executed multiple regression analysis to test research hypotheses Findings - Regrading results, brand awareness, employee service, and product diversity are positively associated with willingness to pay of duty free shop product. Moreover, the results of regression analysis suggest the inverted-U shape association between crowding and willingness to pay. However, price fairness appeared as non-significant variable to account for willingness to pay in the multiple regression analysis. Originality - This study contributes to the literature by examining duty free shop customers more.

• 한국정보시스템학회지:정보시스템연구
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• 제32권2호
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• pp.63-85
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• 2023

Purpose According to a recent survey, more than 90% of customers make purchase or use decisions for their products and services, primarily based on word-of-mouth(WOM) information (reviews, recommendations, ratings, etc.). However, few studies have explored what factors influence user's WOM intention in the context of OTT service. To address this gap, this study investigates the antecedent factors of WOM intention by adopting stimulus-organism-response (SOR) theory and pleasure arousal dominance (PAD) theory as a theoretical basis. Design/methodology/approach The research model consists of stimulus factors (diversity of original content, aesthetics, interactivity, personalization quality), emotional factors (pleasure, excitement, dominance), and behavioral factor (WOM intention). The research hypothesis was tested using the survey data collected from OTT service users of 305. Findings The result reveals that diversity of original content significantly affects on pleasure and arousal whereas it is not associated with dominance. Findings indicate that aesthetics positively influences pleasure, and interactivity is not associated with arousal. It is also proven that personalization quality has a positive effect on dominance. In addition, pleasure, arousal, and domination are proven to be positively and significantly related to WOM intention.

• 아태비즈니스연구
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• 제14권2호
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• pp.141-151
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• 2023

Purpose - This study aims to determine whether four characteristics of tourism content on YouTube (i.e., entertainment; credibility; diversity; and informativeness) influence tourists' destination choices. Design/methodology/approach - A total of 201 Koreans and Mongolians who use YouTube were surveyed in the research. Validity and reliability, correlation, and regression analyze were performed in SPSS 29.0. Findings - As a result of the study, it was found that the features of YouTube tourism content, such as entertainment, credibility, and diversity, have a positive effect on tourists' choice of destination. Also, it was found that there is no difference in the perception of tourism content features between Korean and Mongolian YouTube users and it is not statistically significant. Research implications or Originality - Tourists' YouTube content shows that YouTube features such as entertainment, variety, and trustworthiness, influencing tourists' travel destination choices. The limitations of this study and suggestions for future research were discussed.