http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
재무건전성과 변동성을 이용한 주식 포트폴리오의 위험조정성과 향상
박원정 성균관대학교 경영연구소 2014 자산운용연구 Vol.2 No.2
This study examines the relatively low volatility and relatively low financial soundness of stocks that make up the KOSPI 200. A portfolio construction strategy that selects stocks with two excellent conditions is a passive It was investigated whether it can generate higher risk-adjusted returns than a passive strategy. Stock returns for listed companies that were included in the domestic KOSPI 200 from January 2000 to December 2013 According to the volatility and financial soundness scores, when eight portfolios constructed each year were surveyed, low volatility Stocks with high financial soundness showed high risk-adjusted returns. Satisfying low volatility and high financial soundness When the portfolio was composed of stocks, the annual average performance exceeded the KOSPI 200 by 9.37%p, -5.76%p of annual average volatility was reduced. Through robustness verification, these results are not only It has been shown to be effective compared to other portfolio construction strategies. This paper examines the risk adjustment performance when the stock selection strategy based on financial soundness and low volatility is applied to KOSPI200 stocks. This is the first domestic and foreign paper to empirically analyze the improvement potential of Many existing funds outperform the benchmark. The demand for risk aversion of domestic investors, which increased after the financial crisis, was not met. However, the presented portfolio aims to increase future investment returns by improving risk-adjustment performance. retirement pension or In order to achieve the financial goals of general individual investors, the need for long-term investment-capable stock funds is increasing. This study is meaningful in that it suggests the possibility of a new investment method to the needs of these fields.
VACS: 패션 객체 영역 분할 기법을 통한 가상 착용 기술 아티팩트 보정 시스템
박원정,정유진,박순찬,박진아 한국정보과학회 2022 정보과학회논문지 Vol.49 No.10
Virtual try-on (VITON) technology is receiving a lot of attention with the development of Generative Adversarial Networks (GANs) [1]. Previous approaches to VITON synthesized 2D model images and in-shop clothing images using a generative model. However, when synthesizing the top, VITON erroneously changes pixels in unintended areas, such as the background and pants. In this study, we propose the VITON Artifact Correction System (VACS), which divides and protects targeted clothes synthesized in VITON by fashion object segmentation, and replaces the pixels corresponding to the remaining areas with the original model image to increase the realism of t he final composition. 생산적 적대 신경망[1] 기술이 발전함에 따라 모델 및 제품 이미지를 합성하는 가상 착용 기술(virtual try-on, VITON)에 대한 연구 역시 활발히 이루어지고 있다. 현재까지의 VITON 기술은 생성모델을 통해서 모델 이미지와 의류 제품 이미지를 합성해 해당 의류 제품을 착용한 모델의 이미지를 만들어낸다. 그러나 상의를 합성할 시 바지, 배경 등에 해당하는 픽셀도 변형되는 문제가 있다. 본 연구에서는 패션 객체 영역 분할 기술을 통해 VITON에서 합성된 제품 영역을 분할하여 보호하고, 그 외의 영역에 해당하는 픽셀은 원본 이미지로 대체하여 합성 이미지의 사실감을 높이는 가상 착용 기술 아티팩트 보정 시스템을 제안한다.
발화분석 어플리케이션을 활용한 상호작용 증진 부모교육이 언어발달지연 아동과 부모의 발화 및 대화차례 개시에 미치는 영향
박원정,임동선 한국언어청각임상학회 2015 Communication Sciences and Disorders Vol.20 No.4
배경 및 목적: 언어발달지연 아동의 조기중재 방법으로서 실시되는 부모교육은 조기중재에 효과적이나 부모가 학습한 전략을 가정에서 적용하고 이를 일반화시키는 것에 어려움이 따른다. 따라서 본 연구는 부모교육의 효과를 높여줄 수 있는 도구로서 발화분석 어플리케이션의 활용가능성에 대해 알아보는 것을 목적으로 하였다. 방법: 만 2-3세 언어발달지연 아동과 그 부모, 총 8쌍이 연구에 참여하였다. 자발화 수집을 통한 사전 평가 실시 이후, 총 6주간의 부모교육이 실시되었다. 부모교육이 실시되는 동안 4쌍의 실험집단 부모는 아동과의 상호작용에 발화분석 어플리케이션을 사용하였으며, 나머지 4쌍의 부모는 상호작용에 관한 일지만을 적었다. 사후평가 또한 사전평가와 마찬가지로 놀이 상황에서의 자발화 수집을 통해 이루어졌으며, 사전 및 사후평가에서 수집된 자료는 발화 수, 대화차례 개시 비율로 분석되었다. 결과: 부모교육 이후 부모의 발화 수가 유의하게 줄어들었으며, 발화분석 어플리케이션을 사용한 아동 집단은 통제집단에 비해 대화차례 개시 비율 변화 폭이 더 큰 것으로 나타났다. 논의 및 결론: 부모교육은 부모-아동 상호작용에 긍정적 효과가 있으며, 발화 분석 어플리케이션이 이러한 중재 효과를 높이는 것에 도움을 주는 것으로 나타났다.
박원정,공세진,박종현 한국식품과학회 2021 Food Science and Biotechnology Vol.30 No.7
The bacteriophages (phages) in the waterykimchis (Baek-kimchi and Dongchimi) were characterizedto determine the phage ecology of lactic acid bacteria(LAB). Kimchi obtained from the Seoul markets had anaverage of 2.1 log phage particles/mL, corresponding to28% of the bacterial counts on a log scale. High counts of5.5–6.5 log particles/mL of phages were noted in the earlyphase of fermentation (reaching pH 4), and 2.1–3.0 logphage particles/mL were found in the later phase, withsome fluctuation in numbers. The LAB hosts changed fromWeissella and Leuconostoc to Lactobacillus during Dongchimifermentation. Fifteen phages, except for those ofLactobacillus, were isolated from diverse strains in theearly phase. Five Weissella phages were Podoviridae, andall 10 Leuconostoc phages were Myoviridae. Phages hadnarrow and different host infection spectra to strains of thesame species and high acidic stability. Therefore, themortality and diversity of LAB during natural kimchi fermentationmay be related to the specific phages of thehosts.
박원정,석혜은,임동선 한국언어청각임상학회 2023 Communication Sciences and Disorders Vol.28 No.2
Objectives: The purpose of this study was to determine whether there were changes in language ability and vocabulary usage of children aged 18 to 36 months by specific time points. Methods: A total of 1,152 Korean children’s Wordbank data based on the MacArthur-Bates communication development assessment (K M-B CDI) were used for analysis. Korean Wordbank data is divided into two sections according to the time of data collection, one is collected before 2003, and the other is collected between 2016-2017. Data from the 2-time points were divided into time point 1 group (n= 988), and time point 2 group (n= 164). The total score and category score of K M-B CDI were compared between the time points. In addition, the significance of differences in each vocabulary item was compared by performing differential item functioning analysis based on classical test theory and item response theory. Results: This study found that the group difference in total score was not significant. However, the differences in category scores were found to be significant in 7 of the total 24 categories, and the scores of the time point 2 group were found to be significantly higher than the time point 1 group in the 6 categories. In addition, 117 items out of a total of 641 items were analyzed to have a differential function. Conclusion: Given that children in time point 2 showed higher performance in the categories of function words, it can be inferred that changes in children’s language skills may appear over time, and the results of this study also confirmed the dynamics of early children’s vocabulary use patterns.