Comparison of acrylamide and furan concentrations, antioxidant activities, and volatile profiles in cold or hot brew coffees

강다은,이행운,Munkhtugs Davaatseren,정명섭 한국식품과학회 2020 Food Science and Biotechnology Vol.29 No.1

The aim of this study was to investigate the formation of furan and acrylamide and to compare antioxidant capacities and volatile compounds in cold or hot brewed coffees. Cold brews were prepared at 5 C and 20 C for 12 h. using steeping and dripping, and hot brews were prepared at 80 C and 95 C for 5 min. using the pour-over method. Furan contents of cold steeping at 5 C and hot brewed at 80 C showed the higher levels significantly (p\0.05), which were 17.0 ± 0.5 and 10.6 ± 0.1 ng/mL, respectively. However, acrylamide contents in cold steeping at 5 C and hot brew at 80 C showed lower levels, which were 4.1 ± 0.4 and 3.5 ± 0.1 ng/mL respectively. Cold brews at 20 C showed the highest levels of antioxidant activities while hot brews showed similar levels with cold brews at 5 C. This study confirms that levels of different beneficial and hazardous chemical compounds could be manipulated by adjusting the coffee extraction conditions.

Safety and feasibility of hybrid tracheostomy

강다은,정인범,권선중,손지웅,구관우 대한중환자의학회 2021 Acute and Critical Care Vol.36 No.4

Background Percutaneous dilatational tracheostomy (PDT) is widely used in intensive care units, but this conventional method has some disadvantages, such as requirement of a lot of equipment and experts at the site. Especially, in situations where the patient is isolated due to an infectious disease, difficulties in using the equipment may occur, and the number of exposed persons may increase. In this paper, we introduce hybrid tracheostomy that combines the advantages of surgical tracheostomy and PDT and describe our experiences. Methods Data from 55 patients who received hybrid tracheostomy without bronchoscopy from January 2020 to February 2021 were collected and reviewed retrospectively. Hybrid tracheostomy was performed at the bedside by a single thoracic surgeon. The hybrid tracheostomy method was as follows: after the skin was incised and the trachea was exposed, only the extent of the endotracheal tube that could not be removed was withdrawn, and then tracheostomy was performed by the Seldinger method using a PDT kit. Results The average age was 66.5 years, and the proportion of men was 69.1%. Among the patients, 21.8% were taking antiplatelet drugs and 14.5% were taking anticoagulants. The average duration of the procedure was 13.3 minutes. There was no major bleeding, and there was one case of paratracheal placement of the tracheostomy tube. Conclusions In most patients, the procedure can be safely performed without any major complications. However, patients with a short neck, a neck burn or patients who have received radiation therapy to the neck should be treated with conventional methods.

microRNA 26a-5p inhibits cancer stemness through regulating POLR3G

강다은,정인범,김지혜,권선중,나문준,손지웅 대한내과학회 2018 대한내과학회 추계학술대회 Vol.2018 No.1

A Study on Impolite Expressions Using Metaphor -Focusing on Online News Article Comments-

강다은,정유진 한국텍스트언어학회 2023 텍스트언어학 Vol.54 No.-

Although there are many authoritative studies on metaphor and impoliteness, most of them do not consider metaphor as an impoliteness strategy. Thus, this study aims to explore the different patterns of metaphorical expressions causing impoliteness in the comments sections of four fields of Korean online news articles. After collecting comments on societal, political, economic and cultural news articles based on several keywords, we categorize and evaluate the metaphorical expressions used to express impolite opinions according to the Great Chain of Being hierarchy and the features these metaphorical expressions serve to highlight and hide. The results show different patterns for different target of attack. First, conceptual metaphor HUMAN IS AN ANIMAL and its linguistic expression ‘Public is a pig and a dog’ was commonly used to highlight the baseness of the public while hiding its intelligence. Next, conceptual metaphor HUMAN IS A THING and its linguistic expression ‘Journalist is a trash’ was common in highlighting the perceived uselessness of the occupational group of journalist while hiding its journalistic efforts. Finally, conceptual metpahor HUMAN IS A THING and its linguistic expression ‘Politician with negative reviews is a dirty thing’ was often used to highlight political threats and meaninglessness while hide politicians’ efforts and humanity. These findings demonstrate the effectiveness of metaphor use in expressing impolite online and suggest new possibilities for categorization of metaphor patterns.

The Influence of Children’s Temperament, Phonological Working Memory, Mother Related Factors, and Language Environment on Vocabulary Development in Korean Monolingual and English-Korean Bilingual Children

강다은,임동선 한국언어청각임상학회 2022 Communication Sciences and Disorders Vol.27 No.2

Objectives: This study investigated the influence of internal and external factors on vocabulary development in Korean monolingual and English-Korean bilingual children, and examined predictors of their vocabulary skills. Methods: A total of 45 children aged from 3-6 years participated in this study, including Korean monolingual children (N= 30), and English-Korean bilingual children (N= 15). Children completed standardized vocabulary tests to measure vocabulary skills. To examine internal and external factors, a nonword repetition (NWR) task was administered, and participants’ mothers completed the Children’s Behavior Questionnaire-Very Short Form, the Parenting Stress Index, Fourth Edition Short Form (PSI-4-SF), the Parental Styles and Dimensions Questionnaire, and the Language Environment Questionnaire. Results: For monolingual children, internal factors were significantly correlated with Korean vocabulary skills, and effortful control was the only predictor. For bilingual children, there was a significant correlation between internal factors and Korean vocabulary skills. Effortful control and Korean NWR were predictors of Korean receptive vocabulary skills, and Korean NWR predicted Korean expressive vocabulary skills. Their English vocabulary skills were significantly associated with internal and external factors. Quantity of mother’s English input and English NWR were predictors of English receptive vocabulary skills, and quantity of mother’s English input, English NWR and quality of Korean input were predictors of English expressive vocabulary skills. Conclusion: The results suggest that when examining vocabulary skills, we should consider the influence of effortful control for monolingual children and the influence of mothers’ language use at home for bilingual children. Furthermore, NWR should be applied as a clinical tool when assessing bilingual children.

소리 청취 매체로서의 문자 예술: 신종원 소설집 『전자 시대의 아리아』를 중심으로

강다은 한양대학교 음악연구소 2023 音樂論壇 Vol.50 No.-

Novelist Shin Jong-Won(1992-), who was elected to the Hankook Ilbo New Young Writers’ Prize in 2020, has been actively utilizing the elements of ‘sound’ and ‘audio’ in his works, attracting attention for his experimental forms that have not been found in conventional literature. In Shin’s works, which are steeped in various auditory themes, various auditory elements such as voice, notes, tempo, noise, audio channels, and media control symbols are utilized in various ways in the novel, which is a literary art that crosses digital and analog. Accordingly, the focus of this study is to analyze the following. First, in what ways does literature, a literary art, reflect and utilize sound and acoustics in a media environment that has changed with the development of technology? Second, can literature, a literary art, become a ‘medium’ that accepts and enjoys sound and acoustics, beyond the use of sound as a material or technique in literature? In response, this paper examines the expression of various auditory elements in the six novels included in Shin Jong- won’s Aria of the Electronic Age. At the heart of the discussion is the possibility of a new form of medium that aims to reach the listener as sound itself, as distinct from the ‘auditory image’ that is utilized merely to accentuate literary effects. This new type of narrative will be referred to here as the ‘musicalization of the novel’ or the ‘sonification of the text’.

스마트 글래스를 활용한 증강현실 기반의 관광경로안내를 위한 사용자 인터페이스 설계

강다은(Daeun Kang),김다은(Daeun Kim),이영민(Youngmin Lee) 대한공간정보학회 2016 한국공간정보학회 학술대회 Vol.2016 No.10

코퍼스 – 실험 – 딥러닝 연구방법론 비교분석: ‘-도록’ 통제 구문을 중심으로

강다은(Daeun Kang),송상헌(Sanghoun Song) 한국중원언어학회 2022 언어학연구 Vol.- No.62

This study aims to examine how convergent results are showing on specific language phenomenon, by using methodological pluralism. Focusing on the ‘-tolok’ control construction, we compared the results of three research methodologies: corpus, experiment, deep learning. Previous studies used corpus exploration and language experiment separately or deep learning based on English data. However, it was not sufficiently implemented that comprehensively examining the three methodologies and deep learning analysis using large amount of data based on specific Korean language phenomenon. Accordingly, we demonstrated whether the results of quantitative analysis agree with each other for the ‘-tolok’ control construction using methodological pluralism. Furthermore, the types of Korean ‘control verb’ are classified into two types. This study is significant in showing that different types of methodology can be complement to each other by adding deep learning to the corpus and experimental methods. Additionally, we empirically revealed the necessity of revisiting the using ‘seltukha-’ as a control verb in Korean and presented four verbs that require further study to be classified as control verb, including ‘seltukha-’.

업무시설의 아트리움 공간계획에 관한 연구

강다은(Kang, Da-Eun),윤동식(Yoon, Dong-Sik) 한국실내디자인학회 2023 한국실내디자인학회 학술대회논문집 Vol.25 No.1

넥슨: 모바일 게임 시장의 과제와 성공을 위한 전략 모색

강다은(Da-eun Kang),강윤정(Yun-jeong Kang),박수민(Soo-min Park),설마루(Ma-roo Seol),심다희(Da-hee Sim),최승호(Seung-ho Choi) 한국경영학회 2016 Korea Business Review Vol.20 No.4

성공한 기업은 기존의 시장과 유사한 시장으로 진출할 때 기존의 전략을 활용하는 경향이 있다. 기업은 막대한 비용을 들여 새 상품을 개발하는 위험을 부담하기 보다는 이미 검증된 성공작을 발전시켜 상품화 하는 것을 선호한다. 본 사례는 넥슨의 온라인게임 시장 성공 전략을 살펴보고 이를 활용해 모바일 시장에 진출한 과정과 성과에 대하여 살펴보았다. 넥슨은 온라인게임 시장에서 ‘부분유료화’의 수익구조와 성공적인 인수합병(M&A)을 통해 지속적인 매출증대와 성장을 달성하였다. 그러나 스마트폰의 대중화와 함께 게임시장의 중심이 모바일 게임으로 이동하였지만 넥슨은 그 중요성을 간과하고 뒤늦게 모바일게임 시장에 진출하였다. 시장 후발주자인 넥슨은 그들의 장점인 ‘창의성’을 통한 새로운 콘텐츠 개발보다는 기존의 온라인 시장에서 큰 성공을 거두었던 게임을 모바일 시장에 출시하는 전략을 선택하였고 이는 결국 넥슨의 모바일 시장에서 부진한 성과로 이어졌다. 본 논문은 넥슨이 모바일게임 시장에서 당면한 과제를 살펴보고 경쟁우위를 창출하기 위한 전략에 대해 살펴보고자 한다. With the rapid growth of the mobile industry, Nexon, the market leader of the online game industry, has sought to develop its competitive advantage in the mobile game market. A key element of Nexon’s successful strategy in the online game market was the development of innovative games through the creativity of Nexon’s engineers, aggressive M&A, and the leadership of its CEO. This case first examines Nexon’s successful strategies in the online game market. Then, we analyze Nexon’s strategies in the mobile game market as a late mover. This case discusses how Nexon should develop and adjust their existing strategies to create competitive advantages in the mobile game market.