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Three-Dimensional Rapid Prototyping of Multidirectional Polymer Nanoprobes for Single Cell Insertion
Yang, Dasom,Hong, Hyeonaug,Seo, Yoon Ho,Kim, Lo Hyun,Ryu, WonHyoung American Chemical Society 2015 ACS APPLIED MATERIALS & INTERFACES Vol.7 No.30
<P>Three-dimensional (3D) thermal drawing at nanoscale as a novel rapid prototyping method was demonstrated to create multidirectional polymer nanoprobes for single cell analysis. This 3D drawing enables simple and rapid fabrication of polymeric nanostructures with high aspect ratio. The effect of thermal drawing parameters, such as drawing speeds, dipping depths, and contact duration on the final geometry of polymer nanostructures was investigated. Vertically aligned and L-shaped nanoprobes were fabricated and their insertion into living single cells such as algal cells and human neural stem cells was demonstrated. This technique can be extended to create more complex 3D structures by controlling drawing steps and directions on any surface.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2015/aamick.2015.7.issue-30/acsami.5b05254/production/images/medium/am-2015-05254k_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am5b05254'>ACS Electronic Supporting Info</A></P>
Microchannel system for rate-controlled, sequential, and pH-responsive drug delivery
Yang, Dasom,Lee, Jung Seung,Choi, Chang-Kuk,Lee, Hong-Pyo,Cho, Seung-Woo,Ryu, WonHyoung Elsevier 2018 ACTA BIOMATERIALIA Vol.68 No.-
<P><B>Abstract</B></P> <P>Controlled delivery of drug at a constant rate, in a sequential order, or responsive to environment conditions has been pursued for a long time to enhance the efficacy of therapeutic molecules and to minimize side effects of highly potent drugs. However, achieving such delicately-controlled delivery of a drug molecule is non-trivial and still remains a challenge. We propose the use of microchannels to control the rate, sequence, and pH-responsiveness of drug delivery for high precision and predictability. In this study, we introduce elementary drug delivery units consisting of micro-reservoirs and microchannels that have variations in their lengths, widths, numbers, and straightness. The release study demonstrates that the release rates of model drugs can be modulated by the design of microchannels. Finite element modeling of drug release predicts the performance of the drug delivery units with high accuracy. The possibility of sequential drug delivery is also demonstrated using biodegradable polymer plug in microchannels. Finally, pH-responsive delivery of drugs in microfluidic units is also discussed and demonstrated via cell viability tests.</P> <P><B>Statement of Significance</B></P> <P>In this work, we developed microchannel-based drug delivery devices whose release rate could be accurately calculated and controlled by design of microchannel geometry. Although there have been many advances in microfabricated drug delivery systems, in particular, reservoir-based systems, no systematic investigation has been made to utilize the release channels. In our work, an equivalent electrical circuit concept was applied to the microfluidic systems for more detailed design and analysis. A microfluidic channel was regarded as an electrical resistor; their diffusion/electrical flux could be tuned with geometric factors such as length, width, a number of channel/resistor and their connections. Furthermore, from delivery rate control using channel geometry, multifunctional channel-based release systems for sequential and pH-responsive were demonstrated.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
모의 양육효능감이 유아의 정서조절능력에 미치는 영향: 모의 정서표현성 및 유아의 부정적 정서에 대한 반응의 매개효과
양다솜 ( Dasom Yang ),심혜원 ( Hae Won Shim ) 한국영유아아동정신건강학회 2021 영유아아동정신건강연구 Vol.14 No.1
The purpose of this study is to verify the mediating effects of mother’s emotional expressiveness and reactions to children’s negative emotions between mother’s parenting efficacy and young children’s emotion regulation. The participants of this study were 269 mothers with their children aged from 3 to 5 years old were surveyed through an online questionnaire. The main results of this study were as follows. First, the partial mediating effects of mother’s positive and negative emotional expressiveness were found in the relationship between mother’s parenting efficacy and children’s emotion regulation. Second, it has been observed that mother’s positive, negative emotional expressiveness and mother’s non-supportive reactions to children’s negative emotions have sequential dual mediation effects on the relationship between mother’s parenting efficacy and children’s emotion regulation. This study is meaningful in that it has been confirmed that the parents’ beliefs, the role of modeling of emotional expression, and the parenting behavior have important effects on the children’s emotion regulation. Finally, the limitations of the study were examined and suggestions for further research were discussed.
중학생의 개인심리적 특성과 인터넷 과의존 관계에서 또래집단 참여활동의 조절효과 검증
양다솜 ( Dasom Yang ),김진숙 ( Jinsook Kim ) 사단법인 아시아문화학술원 2021 인문사회 21 Vol.12 No.3
본 연구의 목적은 중학생의 개인심리적 특성이 인터넷 과의존에 미치는 영향을 알아보고 또래집단 참여활동의 조절효과를 검증하는데 있다. 이를 위해 본 연구는 2018년도 한국복지패널(KOWPS)의 자료에 응답한 중학생 391명을 대상으로 위계적 다중회귀분석을 실시하였다. 본 연구결과는 다음과 같다. 첫째, 중학생의 개인심리적 특성중 우울과 불안, 위축, 학업스트레스, 학교폭력피해경험 모든 독립변수는 인터넷 과의존에 통계적으로 유의미한 영향을 미치는 것으로 나타났다. 둘째, 중학생의 개인심리적 특성 중 학교폭력 피해를 경험한 집단은 또래집단 참여활동 경험여부에 따라 인터넷 과의존에 조절효과가 있는 것으로 나타났다. 이와 같은 연구결과를 토대로 청소년의 인터넷 과의존 문제를 예방하고 감소시키기 위한 사회복지 개입방안에 대하여 논의하였다. The purpose of this study is to investigate the effect of middle school students’ personal psychological characteristics on Internet overdependence and to verify the moderating effect of peer group participation activities. this study conducted a multiple regression analysis on 391 middle school students who responded to data from the 2018 Korea Welfare Panel Survey (KOWPS). The results of this study are as follows. First, among the psychological characteristics of individual middle school students, depression and anxiety, academic stress, school violence victim experience, atrophy and all independent variables had a statistically significant effect on internet overdependence. Second, it was found that the group who experienced school violence victims, a psychological characteristic of middle school students, had the effect of controlling excessive dependence on the Internet according to peer group participation. Based on these results, social welfare intervention measures were discussed to prevent and reduce the problem of adolescents’ excessive Internet overdependence.
기술사업화 역량이 재무성과에 미치는 영향에 대한 메타분석
양다솜(Dasom Yang),홍윤지(Yunjee Hong),남정민(Jungmin Nam) 한국과학기술실용화학회 2023 과학기술융합연구 Vol.2 No.1
본 연구는 기술사업화 역량을 제품화 능력, 생산화 능력, 마케팅 능력으로 구분하여 기업의 재무 성과에 미치는 영향에 대하여 메타분석을 실시하였다. 전체 24247건의 논문 중 연구주제와 관련이 있고 상관관계 계수(r)가 있는 13건의 논문을 연구대상으로 하였다. 본 연구의 분석 결과는 다음과 같다. 첫째, 평균 효과 크기를 확인한 결과 제품화 능력의 경우 평균 효과 크기 0.4319, 생산화 능력의 경우 0.2689, 마케팅 능력의 경우 0.3936으로 나타났다. 이는 기술사업화 역량이 재무성과에 미치는 영향이 통계적으로 유의미한 것으로 분석되었다. 둘째, 본 연구 결과가 모든 연구를 대표하는지 확인한 결과, 제품화 능력과 마케팅 능력이 재무성과에 정(+)의 영향을 미치고 생산화 능력은 통계적으로 유의미하지 않음을 확인하였다. 본 연구의 시사점은 기술사업화 역량과 기업의 재무성과의 관계를 종합적으로 분석했다는 학문적 의의가 있다. 연구결과를 토대로 기업은 성공적인 이익 창출과 지속적인 성과를 위하여 쳬계적인 기술사업화 역량을 갖추어야 할 것이다. 또한 정부는 국가 경쟁력을 높일 수 있도록 기술사업화 역량을 강화시키는 다양한 정책을 수립하는데 노력해야 할 것이다. This study conducted a meta-analysis on the impact on a company's financial performance by dividing technology commercialization capabilities into commercialization capabilities, production capabilities, and marketing capabilities. Of the total 2,4247 papers, 13 papers related to the resear ch topic and with a correlation coefficient (r) were studied. The analysis results of this study are as follows. First, as a result of checking the average effect size, it was 0.4319 for commercializatio n ability, 0.2689 for production ability, and 0.3936 for marketing ability. It was analyzed that the effect of technology commercialization capabilities on financial performance was statistically signif icant. Second, as a result of confirming that the results of this study represent all studies, it was confirmed that commercialization and marketing ability had a positive (+) effect on financial perfor mance and production ability was not statistically significant. The implications of this study are of academic significance that comprehensively analyzed the relationship between technology com mercialization capabilities and corporate financial performance. Based on the results of the study, companies should have the ability to commercialize technologies for successful profit generation and continuous performance. In addition, the government should make efforts to establish various policies to strengthen its technology commercialization capabilities to increase national competitiv eness.