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Comparison of Digital PCR and Quantitative PCR with Various SARS-CoV-2 Primer-Probe Sets
( Changwoo Park ),( Jina Lee ),( Zohaib Ul Hassan ),( Keun Bon Ku ),( Seong-jun Kim ),( Hong Gi Kim ),( Edmond Changkyun Park ),( Gun-soo Park ),( Daeui Park ),( Seung-hwa Baek ),( Dongju Park ),( Jih 한국미생물생명공학회(구 한국산업미생물학회) 2021 Journal of microbiology and biotechnology Vol.31 No.3
The World Health Organization (WHO) has declared the coronavirus disease 2019 (COVID-19) as an international health emergency. Current diagnostic tests are based on the reverse transcription-quantitative polymerase chain reaction (RT-qPCR) method, which is the gold standard test that involves the amplification of viral RNA. However, the RT-qPCR assay has limitations in terms of sensitivity and quantification. In this study, we tested both qPCR and droplet digital PCR (ddPCR) to detect low amounts of viral RNA. The cycle threshold (CT) of the viral RNA by RT-PCR significantly varied according to the sequences of the primer and probe sets with in vitro transcript (IVT) RNA or viral RNA as templates, whereas the copy number of the viral RNA by ddPCR was effectively quantified with IVT RNA, cultured viral RNA, and RNA from clinical samples. Furthermore, the clinical samples were assayed via both methods, and the sensitivity of the ddPCR was determined to be equal to or more than that of the RT-qPCR. However, the ddPCR assay is more suitable for determining the copy number of reference materials. These findings suggest that the qPCR assay with the ddPCR defined reference materials could be used as a highly sensitive and compatible diagnostic method for viral RNA detection.
Bipartite network analysis of sample-based music
Park Dongju,Park Juyong 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.82 No.7
Musical sampling is a composition technique of popular music where one borrows elements from existing recordings to produce new songs. The sampled music is thus deeply related to the newly created music based on it. We can, therefore, surmise that the sampling practice of an artist refects the characteristics of the subgenre or the music community which the artist belongs operates in and belongs to, implying that the sampling relationships can help us understand the origin and evolution of many diferent styles of sample-based music. In this study, we present a complex network analysis of the communities of artists connected via sampling relationships. We establish an artist–sample bipartite network of artists who perform the sampling, and the songs that are the subjects of sampling. The detection of communities composed of artists and songs demonstrates that the sample-based musical scene has a clear community structure where each community features artists with high centrality that allows us to identify the musical styles of the community. While this study focuses on the understanding of sample-based music that forms the basis of an overwhelming majority of contemporary popular musical paradigms, we believe this framework is general enough to be applied to many other creative felds that involve referencing of existing works.
박동주(Dongju Park),유미진(Mijin You) 학습자중심교과교육학회 2023 학습자중심교과교육연구 Vol.23 No.2
목적 본 연구 목적은 관계적 공격성 관련 변인들의 효과 크기를 메타분석을 실시하여 종합적으로 분석하는 것이다. 방법 2010년부터 2020년 3월까지 국내외에서 게재된 학술지 논문 149편을 선정하여 관계적 공격성 관련 변인들을 추출하였다. 관계적 공격성 관련 변인들의 전체 효과 크기를 확인한 뒤 위험/보호 변인군, 개인 내적/가정환경/또래 및 학교환경/사회환경 변인군으로 범주화하여 그 효과 크기를 산출하고 이를 비교하였다. 마지막으로 각 변인군에서 연령, 성별, 문화에 의한 조절 효과를 분석하였다. 결과 분석 결과 모든 변인군에서 중간 정도의 효과 크기를 보였는데, 구체적으로 위험 변인군에서는 또래 및 학교환경 변인군의 효과 크기가, 보호 변인군에서는 사회환경 변인군의 효과 크기가 다른 변인군에 비해 큰 편이었다. 개인 내적 변인군에서는 정신병질, 외현화 행동문제가, 또래 및 학교환경 변인군에서는 학교환경, 공격성 피해, 부정적 교사관계가 큰 효과 크기로 나타났다. 또한 위험 변인군 중 개인 내적, 가정환경 변인군에서 연령의 조절 효과를, 보호 변인군 중 가정환경 변인군에서 성별의 조절 효과를 확인하였다. 보호 변인군 중 개인 내적 변인군에서는 문화에 따른 조절 효과를 확인하였다. 결론 본 연구 결과를 토대로 관계적 공격성에 대한 다각적인 측면에서의 개입 방안과 차후 연구 제언을 제시하였다. Objectives This study conducted a meta-analysis in order to comprehensively analyze the effect size on variables related to relational aggression. Methods 149 studies were selected among the papers published in South Korea and other countries, from 2010 to March 2020, variables related to relational aggression were extracted. Total effect size of variables related to relational aggression was calculated, next each variables were classified into risk and protection variable groups, and into individual internal, family environment, peers and school environment, and social environment variable groups, and checked the overall effect size. Finally, the moderating effects by age, gender, culture were analyzed in each variable group. Results As a result of the analysis, it showed medium effect size in all variable groups. Specifically, the effect size of peers and school environment variable group in the risk variable group and the effect size of social environment variable group in the protection variable group were larger than other variable groups. Psychopathy and externalizing behavior problem in the individual internal variable group, and class environment, aggression victimization, and negative teacher relation in the peers and school environment variable group were shown to have a large effect size. In addition, individual internal variable group and family environment variable group in the risk variable group had moderating effect by age, family environment variable group in the protection variable group had moderating effect by gender. The moderating effect of culture was confirmed in individual internal variable group among the protection variable group. Conclusions Based on the above results, the suggestion for multilateral interventions to relational aggression and limitations of this study were discussed.
박동주 ( Dongju Park ),신판섭 ( Panseop Shin ) 한국창의정보문화학회 2023 창의정보문화연구 Vol.9 No.2
인터랙티브 미디어의 특성은 활동적이고 체험적인 교육 환경을 조성하는데 적합하며 기존의 단순한 교육방식보다 높은 학습 효율을 기대할 수 있다. 하지만 인터랙티브 미디어를 활용하기 위해서는 다양한 장치와 소프트웨어가 필요한데, 이러한 장치들은 설치와 운용이 까다롭거나 필요한 기능을 제공하지 못한다는 단점이 있다. 따라서 본 연구에서는 유니티와 라이다 센서를 연동하여 콘텐츠 운용환경을 구축하고, 실제 운용할 교육 콘텐츠를 제작한다. 동작 인식 장비로는 레이저 기반의 라이다 센서를 사용한다. 라이다 센서는 높은 인식률 때문에 사용자의 동작을 인식하기가 용이하지만 센서의 높은 인식률 때문에 발생하는 광범위한 노이즈 처리가 어렵다. 이를 해결하기 위해 센서의 인식 범위를 화면 크기와 동일하게 제한하고 유니티 엔진의 Raycast 기능을 활용해 센서의 노이즈를 축소하고 정밀도를 개선하여 자연스러운 인터랙션이 가능하도록 하였다. 현재 제작된 콘텐츠는 서울특별시교육청 보건진흥원 바른 식생활 체험관에 설치되어 운용되고 있다. Interactive media can expect higher learning efficiency than existing education methods. However, in order to utilize interactive media, various devices and software are required, and these devices are difficult to install and operate and do not perfectly provide necessary functions. Therefore, in this study, we build an interaction environment using Unity and lidar sensors and produce educational contents. A laser-based LiDAR sensor is used as motion recognition equipment. The LiDAR sensor is easy to recognize the user's motion, but it is difficult to process the wide range of noise that the sensor has. To solve this, we limit the recognition range of the sensor to be the same as the screen size, and use the Unity engine's Raycast function to reduce the noise of the LIDAR sensor. As a result, the accuracy of the system is improved and smooth interaction with the user is possible. Currently, the developed interactive contents are installed and operated at the Right Eating Life Experience Center of the Health Promotion Agency of the Seoul Metropolitan Office of Education.
Investigation of the AGA Effect on Performance Analysis of an MPIC
KIM, Dongju,PARK, Myonghee,PARK, Jeongho,KO, Kyunbyoung The Institute of Electronics, Information and Comm 2009 IEICE TRANSACTIONS ON COMMUNICATIONS - Vol.92 No.2
<P>The authors present an accurate analysis for multicode code division multiple access (CDMA) systems equipped with a multipath interference canceler (MPIC) over multipath fading channels. This letter verifies that the previous analysis has used the additional Gaussian approximation (AGA) for multipath interferences so that there is the performance mismatch between the previous analysis and simulations. Furthermore, it is confirmed that the proposed analysis, which does not use AGA, provides an analytical bound.</P>