• 한국환경농학회지
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• 제37권4호
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• pp.312-316
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• 2018

BACKGROUND: Yeast biotechnology finds applications in various industries. Hence, we sought to explore the yeasts associated with the flower of Aster spathulifolius Maxim. This study aimed to isolate yeasts from the flower of the plant and screen for biosurfactant-producing yeasts. METHODS AND RESULTS: We collected flowers of Aster spathulifolius Maxim. and performed pure isolation using four types of media. In total, 117 strains belonging to 4 genera, namely, Cryptococcus (75 strains), Aureobasidium pullulans (30 strains), Candida (11 strains), and Rhodotorula (1 strain), were isolated and identified by ITS sequencing. Upon in-depth analysis, Cryptococcus, the most dominant genus (75 strains) was categorized into the 'Unknown group'. Upon in-depth analysis of A. pullulans, we discovered the 'Unknown group I' (27 strains) and the 'Unknown group II' (2 strains), which have not been reported previously. Two A. pullulans isolates with potent surfactant activity were selected via the screening procedure. CONCLUSION: In this study, a total of 117 strains were isolated from the flower of Aster spathulifolius Maxim. In addition, two biosurfactant-producing yeasts were identified from among the isolated yeasts.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송∙미디어공학회 2018년도 하계학술대회
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• pp.28-30
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• 2018

본 논문에서는 전이중 통신 방식을 사용하는 DOCSIS 3.1 시스템의 자기간섭 제거를 위한 자기간섭신호의 채널 및 비선형 왜곡 요소를 추정하는 기술을 제안한다. DOCSIS 3.1 시스템의 전이중 통신 방식은 일반적으로 가입자 단말인 CM (Cable Modem) 과 케이블방송신호 송신 시스템인 CMTS (Cable Modem Termination System) 사이의 상하향 통신을 시간/주파수의 분할 없이 동시에 수행하는 통신 방식이다. CMTS 에서 CM 의 신호를 수신함과 동시에 CMTS 신호를 송신하는 경우 고출력의 CMTS 송출신호가 CMTS 의 수신기로 인가되는 자기간섭 현상이 발생하게 된다. 이렇게 인가되는 자기간섭신호는 고출력 증폭기 (HPA: High - Power Amplifier) 및 Feedback 채널의 영향으로 크게 왜곡되어 수신된다. 따라서 자기간섭신호를 제거하고 CM 의 신호를 원활하게 복조하기 위해서는 자기간섭신호의 왜곡 요소룰 추정 및 보상하는 절차가 반드시 필요하다. 본 논문에서는 자기간섭신호의 HPA 에서 발생하는 비선형 왜곡 요소 및 Feedback 채널의 영향으로 발생하는 채널 요소를 추정하는 기술을 제안하고 성능을 분석한다. 제안된 기술은 간단한 연산기반으로 왜곡요소의 추정이 가능하며 반복추정을 통해 성능을 효과적으로 향상시키는 것이 가능하다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 추계 학술논문 발표대회
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• pp.157-158
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• 2019

As the aggregate supply and demand shortages in Korea due to the lack of aggregates due to the regulation of production and use conditions of domestic aggregate collectors, the media recently pointed out the distribution of so-called bad aggregates containing soil powder. Such poor aggregates have a high self-absorption rate according to the reference, etc., leading to a decrease in the fluidity of the concrete. Therefore, in order to secure fluidity, the unit quantity increases greatly from $30kg/m^3$ to $55kg/m^3$, and the increased unit yield eventually leads to a decrease in compressive strength, resulting in a decrease in strength from about 35% to 45% compared to general aggregates. It indicates that there is a risk of shortening the life of the structure. Therefore, this study aims to analyze the effect of aggregate soil on concrete.

• 국토계획
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• 제54권1호
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• pp.108-117
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• 2019

The purpose of this study is to investigate whether the plan reflecting the place in cultural regeneration was implemented and whether it was a change of place in culture through culture analyze. Mullae-dong has changed its urban structure into a textile factory, a manufacturing industry, an ironworks+artistic complex, and the Mullae art factory has been organizing a festival that has been created by artists and residents alike in the Mullae creative village. However, prior to the creation of the Mullae art factory in the social element, self-sustaining programs of Mullae creative villages were derived, but now commercial space is mainly derived. Therefore, it is necessary to plan for coexistence of ironworks, cultural space and commercial space rather than expanding into commercial space. Geumcheon-gu Geumcheon-gu Geumcheon Art Factory has become an integrated complex where various industries coexist in industrial complex. Geumcheon Art Factory also holds an artist support program every year and actively works as an international creative exchange center in Seoul. However, programs that act as a mediator are not implemented since 2014, and the Open Studio stops once a year. Therefore, Geumcheon-gu needs to expand programs that can include local programs and programs that can be combined with local cultural media.

• 유통과학연구
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• 제19권1호
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• pp.49-60
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• 2021

Purpose: A good physical appearance greatly affects a person's self-confidence, especially when the media constantly depicts that beautiful men and women are those with perfect bodies, which later forms the perception that being fat or too thin is not attractive. That is in line with the increasing knowledge and the need for nutritious foods and drinks for diets. Therefore, this study aims to see whether there is a relationship between the Weight Rejuvenation Program Everyday product innovation towards millennial purchase decision and the motivation of having an ideal body as a moderating effect. Research design, data, and methodology: Distributed online Google form questionnaires to 96 audiences who commented on "Mute" web series. The respondents consisted of 63 women and 33 men from the millennial generation who lived in Greater Jakarta and were classified as the middle to upper economic class. After all of the data were collected, they were processed using Structural Equation Modeling Partial Least Squares. Results: Product innovation had a significant influence on the purchasing decisions of the millennial consumer, but motivation did not have the moderating function in the relationships between product innovation and purchase decision. Conclusions: The main factor for product innovation that can be accepted by millennials is the product quality that remains good.

• 반도체디스플레이기술학회지
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• 제20권1호
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• pp.48-53
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• 2021

The purpose of this study is to establish a crime prevention system through the Crime Prevention Through Environmental Design (CPTED). The research method went through the double diamond process and discovered the user's needs through the persona analysis. The most representative features are the functions that informs users of the safe and optimal route, checks the presence of streetlights or cctvs in real time to update them, and allows people with similar routs to return home together. It is a function to help safe return home with the help of an autonomous method, and a self-defense function to protect themselves. Therefore, the application presented in this study was intended to be of great help when actually returning home by adding these new functions. In particular, we help users to return home most safely by recommending the best safe route. Through the persona analysis, research method which we had chosen, the needs of users were discovered and implemented in a design that reflected those needs and requirements.

• 대한두개안면성형외과학회지
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• 제22권1호
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• pp.17-25
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• 2021

Background: This study aims to report how the practice of plastic surgeons and their attitude was during the first measure period of coronavirus disease 2019 (COVID-19) pandemic. Methods: A survey study was held among members of the Indonesian Association of Plastic Reconstructive and Aesthetic Surgeons during week 5 after the first report of COVID-19. A 10 multiple-choice questions (MCQs) and 1 essay covered key questions on the area of surgery and operating room, clinics, internal meeting, and consultation. The only open-ended question relates to the last MCQ addresses a future "flipped" medical practice. Results: Response rate was 45.6% among 228 members, with 89.4% did no practice or limited their service to emergency and urgent cases only. Only 1.9% kept their official meeting as usual, while the majority modified it. The practice in the operating theatre and clinic were also altered to comply with the measures; with 21.2% from the total respondents only allowed patients with exposure to come for visit after taking 14 days of self-quarantine. Teleconsultation was practiced by 50% of the respondents, while 41.3% agreed and 10.6% disagreed upon the future "flipped" medical practice. Conclusion: In general plastic surgeons have made supportive actions during the pandemic. Surgery was performed with all precautions at the utmost as a reflection of high alert of viral infection. Teleconsultation has been embraced via existing social media. Agreement upon the future "flipped" medical practice is reasonable. All in all, the actions were considered as most relevant.

• International Journal of Knowledge Content Development & Technology
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• 제11권2호
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• pp.7-21
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• 2021

The study was a descriptive cross-sectional survey which investigated the reading preferences of secondary school students in Nigeria during the lockdown occasioned by COVID-19 pandemic. A hundred secondary school students in Ile- Ife and Ilesa in Osun State, Nigeria were the study respondents. Close ended self-administered questionnaire was used to obtain data. Of the one hundred questionnaire which were applied to the study respondents, ninety-three were retrieved. Data obtained were analyzed using simple frequencies and percentages. The study established that majority of respondents were not pressured to read but read for pleasure. Preference for a wide range of fiction and non-fiction books which was read for purposes ranging from academic, social, relaxation and information was indicated by respondents. Availability of reading materials determined reading preference of majority of respondents as many could not afford to access electronic books whether free or not. The researchers recommended that different types of reading materials that suit the reading preferences and meet the diverse purpose of reading should be provided for the secondary school students during lockdown to improve their reading habits. Public libraries should function during this lock down period within the guidelines of the appropriate health authorities, while school libraries should be equipped to offer virtual services during the lockdown and the students should be exposed to e-books for their reading pleasure.

• 한국보육지원학회지
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• 제18권2호
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• pp.1-18
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• 2022

Objective: A teacher learning community was developed in order to implement a play-centered curriculum at a child care center, and teachers' experiences during the process were explored. Methods: The teacher learning community was carried out for a total of 23 sessions. One researcher and six teachers participated in this study. Data including the transcripts of recordings of the teacher learning community, transcripts of individual teachers' interview recordings, teachers' reflective journals, and social media posts were collected. Data were analyzed according to the qualitative data analysis procedure. Results: The teachers recognized their experiences of the teacher learning community as follows: (1) encouraging and empowering each other to find a way together, (2) self-reflection, communication and sharing with experiences, (3) becoming a teacher who practices change. Conclusion/Implications: The results of this study show the importance and effectiveness of managing the teacher learning community in a way that teachers interact with each other in a collaborative manner within the community based on initiative and spontaneity, and to provide help to each other in the process of understanding and practicing the play-centered curriculum. The teacher learning community supports the professionalism of teachers for the practice of a play-centered curriculum.

• International Journal of Advanced Culture Technology
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• 제9권4호
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• pp.288-294
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• 2021

There are various ways to be infected with malicious code due to the increase in Internet use, such as the web, affiliate programs, P2P, illegal software, DNS alteration of routers, word processor vulnerabilities, spam mail, and storage media. In addition, malicious codes are produced more easily than before through automatic generation programs due to evasion technology according to the advancement of production technology. In the past, the propagation speed of malicious code was slow, the infection route was limited, and the propagation technology had a simple structure, so there was enough time to study countermeasures. However, current malicious codes have become very intelligent by absorbing technologies such as concealment technology and self-transformation, causing problems such as distributed denial of service attacks (DDoS), spam sending and personal information theft. The existing malware detection technique, which is a signature detection technique, cannot respond when it encounters a malicious code whose attack pattern has been changed or a new type of malicious code. In addition, it is difficult to perform static analysis on malicious code to which code obfuscation, encryption, and packing techniques are applied to make malicious code analysis difficult. Therefore, in this paper, a method to detect malicious code through dynamic analysis and static analysis using Trojan-type Downloader/Dropper malicious code was showed, and suggested to malicious code detection and countermeasures.