Effects of the Chain Length of Tris(carboxyalkylamino)triazine on Corrosion Inhibition Properties

유승현,김영운,신지훈,김남균,김준섭 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.1

The corrosion behavior of mild steel was studied in 1M HCl solution containing varying amounts of triazine derivatives having amine groups and alkyl carboxylic acid groups. The synthesized triazine derivatives were characterized by Fourier transform infrared (FT-IR) spectroscopy, NMR, mass spectroscopy, and elemental analysis (EA), and their corrosion inhibition properties were determined by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. We found that the triazine derivatives acted as mixed-type inhibitors by their adsorption on the metal surface. We also proposed that the Langmuir adsorption isotherm model could be used to explain the adsorption of triazine derivatives. In addition, when the alkyl chain length of the triazine derivative was relatively long, we also obtained a high-adsorption equilibrium constant and low Gibbs free energy of adsorption. Thus, we conclude that the alkyl chain length plays an important role in the corrosion inhibition properties of triazine derivatives.

비대면 진료, 무엇이 문제이고 무엇을 어떻게 대비해야 하나

유승현 대한의사협회 의료정책연구소 2022 의료정책포럼 Vol.20 No.1

야간뇨를 호소하는 전립선비대증 환자에서 Amitriptyline의 효과

유승현,정희종 대한비뇨의학회 2008 Investigative and Clinical Urology Vol.49 No.4

Purpose: We evaluated the effects of amitiptyline, as one of the first-line therapies, on the nocturia of patients with benign prostatic hyperplasia (BPH). Materials and Methods: Between June 2005 and December 2006, 50 patients completed this study(Group I=20, Group II=14, Group III=16). Group I was treated with doxazocin 4mg, group II was treated with doxazocin 4mg and tolterodine 4mg and the third group was treated with doxazocin 4mg and amitriptyline 10mg. We measured the treatment efficacy, the clinical parameters and we examined three days of the voiding diaries at baseline and after 4 weeks of treatment, respectively. Results: After 4 weeks of treatment, all the patients had significant improvement for the International Prostate Symptom Score(IPSS) and the quality of life(QoL) score among the clinical parameters and they also showed improvement of their frequency of micturition per 24 hours, per night(nocturnal frequency) among the voiding diary parameters(p<0.05). For the post-treatment comparison of the nocturnal frequency, there was a significant difference between group I and group II as well as between group I and group III(p<0.05), and there was no difference between group II and group III(p>0.05). Although there was 1 case of mild dry-mouth in group II and 1 case of mild dry-mouth and drowsiness in group III, none of the patient dropped out due to side effects. Conclusions: We found significant improvement in the IPSS, the QoL score and the nocturnal frequency after treatment with amitriptyline 10mg. Therefore, amitriptyline 10mg would be helpful as a first-line therapy for BPH patients with nocturia. (Korean J Urol 2008;49:343-349) Purpose: We evaluated the effects of amitiptyline, as one of the first-line therapies, on the nocturia of patients with benign prostatic hyperplasia (BPH). Materials and Methods: Between June 2005 and December 2006, 50 patients completed this study(Group I=20, Group II=14, Group III=16). Group I was treated with doxazocin 4mg, group II was treated with doxazocin 4mg and tolterodine 4mg and the third group was treated with doxazocin 4mg and amitriptyline 10mg. We measured the treatment efficacy, the clinical parameters and we examined three days of the voiding diaries at baseline and after 4 weeks of treatment, respectively. Results: After 4 weeks of treatment, all the patients had significant improvement for the International Prostate Symptom Score(IPSS) and the quality of life(QoL) score among the clinical parameters and they also showed improvement of their frequency of micturition per 24 hours, per night(nocturnal frequency) among the voiding diary parameters(p<0.05). For the post-treatment comparison of the nocturnal frequency, there was a significant difference between group I and group II as well as between group I and group III(p<0.05), and there was no difference between group II and group III(p>0.05). Although there was 1 case of mild dry-mouth in group II and 1 case of mild dry-mouth and drowsiness in group III, none of the patient dropped out due to side effects. Conclusions: We found significant improvement in the IPSS, the QoL score and the nocturnal frequency after treatment with amitriptyline 10mg. Therefore, amitriptyline 10mg would be helpful as a first-line therapy for BPH patients with nocturia. (Korean J Urol 2008;49:343-349)

<李娃傳>의 원형과 웃음

유승현 한국중국소설학회 2009 中國小說論叢 Vol.30 No.-

<李娃傳>, 白行簡作, 見《太平廣記》卷四百八十四, 引自《異聞集》, 以單行本流傳。筆者先表明<李娃傳>的原型來自唐代藝人的口頭敍事, 即是<一枝花話>, 然後探討兩者之間的關係。總之, <李娃傳>以口傳文學<一枝花話>為基礎, 白行簡加工而創作文人敘事。<李娃傳>仍然在敘事結構與喜劇結局上保留了口傳文學的特點, 同時具有文人文學的特點, 因而在細節的安排與描寫上有很多地方閱讀時才感受到藝術魅力。 該論文的主要內容在於, 通過<李娃傳>的文本分析, 指出而表明它所內涵的<笑>。此<笑>不但出於民眾的世界觀與幽默感, 而且出自白行簡的藝術才能。<李娃傳>以<笑>為基礎, 通過人物之間的對話與細節之間的聯繫顯示出現實世界的矛盾。<李娃傳>以<笑>攻擊現實的虛偽, 顛倒封建意識, 嘲笑支配階級的嚴肅態度。<李娃傳>經常使用了反諷的技巧, 這些反諷不僅存在細節的關係之中, 作者還是利用此手法來, 構成整個故事的主題。 最後, <李娃傳>以喜劇為結局, 此結局遭受寫實主義理論的批評。但是因為它以嘲笑封建意識的方式揭露了現實的虛偽, 所以美滿的結局不代表美滿的現實。大部分的讀者把<李娃傳>的結局視為非現實, 這時, 他們通過它與現實的比較, 得出它的非現實性。這意味著非現實的結局讓讀者思考現實。這就是<李娃傳>批判現實的方式, 而不是它的缺點。寫實主義也是創作藝術的方法之一, 不能成為唯一絕對的評價藝術的標準, 只是其標準之一。

Collaboration development factors and consideration for community health promotion practice

유승현 한국보건교육건강증진학회 2010 보건교육건강증진학회지 Vol.27 No.5

Background: Although collaboration for community health is emphasized, the concept and process of collaboration are rather unclear. International research has classified the types of collaboration and focused on the factors influencing successful collaboration. Greater attention is needed for collaboration practice and research domestically. Findings: By the level of intensity, the types of collaboration range from simpler networking to more formal and sophisticated collaboration. A 4-stage collaboration development consists of formation, implementation, maintenance, and institutionalization stages. Influential factors for collaboration development include: shared goals; operational structure and process; sufficient resources; member and leadership characteristics; environment and climate for collaboration; and information exchange and communication. Discussion: Most of collaboration research so far has dealt with partnerships and coalition building with community-based organizations, and much attention is given to private-public partnership for health. Contextual understanding and collaborative environment are the foremost tasks for us to enhance collaboration for community health in our centralized public health system.

RNA 효소와 촉매기작

유승현 생화학분자생물학회 1986 생화학분자생물학회 소식 Vol.6 No.2

다문화청소년이 인식하는 부모의 양육태도가 진로태도에 미치는 영향: 이중문화수용태도의 매개효과를 중심으로

유승현,조성희 성결대학교 다문화평화연구소 2022 다문화와 평화 Vol.16 No.1

The purpose of this study was to examine the effect of parents’ parenting attitudes perceived by multicultural adolescents on career attitudes and the mediating effects of bicultural acceptance attitudes from a family system perspective. For this purpose, data from 1,017 multicultural adolescents of the 8th wave of Multicultural Adolescents Panel Study(MAPS) were used. The results are as follows. First, it was found that the parenting attitude of multicultural family parents affects the career attitude of multicultural adolescents. Second, parenting attitudes of multicultural family parents were found to affect the bicultural acceptance attitudes of multicultural adolescents. Third, in the relationship between the parenting attitudes of multicultural parents and the career attitudes of multicultural adolescents, the bicultural acceptance attitudes was found to have a partial mediating effect. Based on the results, practical suggestions and implications were provided to improve the parenting attitudes of parents of multicultural families as a way to increase the career attitudes of multicultural adolescents and to promote the multicultural adolescents' bicultural acceptance attitudes. 본 연구는 다문화청소년의 진로에 대한 중요성이 증가하고, 이중문화수용태도의 중요성이 증가하는 시점에 가족 체계의 관점에서 다문화청소년이 인식하는 부모의 양육태도가 진로태도에 미치는 영향과 이중문화수용태도의 매개효과를 검증하고자 하였다. 이를 위하여 다문화청소년패널 8차년도 조사에 참여한 다문화청소년 1,017명의 데이터를 활용하여 연구를 수행하였다. 연구를 통해 확인된 주요 연구 결과는 다음과 같다. 첫째, 다문화가족 부모의 양육태도는 다문화청소년의 진로태도에 영향을 미치는 것으로 나타났다. 둘째, 다문화가족 부모의 양육태도는 다문화청소년의 이중문화수용태도에 영향을 미치는 것으로 나타났다. 셋째, 다문화 부모의 양육태도와 다문화청소년의 진로태도의 관계에서 이중문화수용태도는 부분매개효과가 갖는 것으로 나타났다. 연구 결과를 토대로 다문화청소년의 진로태도를 증진하기 위한 방안으로 다문화가족 부모의 양육태도를 향상시키고, 다문화청소년의 이중문화수용태도를 높이기 위한 정책적・실천적 방안에 대한 논의가 이루어졌다.

음성콘텐츠와 라디오의 기회, 인공지능 오디오 일상화

유승현 한국방송협회 2017 방송문화 Vol.- No.411

거친 신체 놀이에 대한 유아의 생각

유승현,엄정애 이화여자대학교 이화어린이연구원 2023 영유아교육: 이론과 실천 Vol.8 No.1

In this study, episodes were organized for each type of Rough and Tumble play(R&T play) tofind out what children thoughts of R&T play, and one-on-one interviews were conducted usingvideo data for 90, 5-year-old children. The research results were as follows. although there wasa difference in the proportion of young children's thoughts about R&T play, the percentage ofpositive responses was higher in all types. Children explained that they thought positively aboutthe R&T play because it was fun and drew their interest to play. Specifically, there were threecriteria for children's positive or negative perception of R&T play: space size, the physical andsocial risks of play, and the teacher's response. First, children decided their thoughts on playbased on the size of the space. Second, the children determined their thoughts on R&T Playaccording to physical and social risks. Third, the children decided their thoughts according tothe teacher's response and attitude toward play. This study is meaningful in that it has learnedabout R&T play from the perspective of children, and it has implications that it has providedhelp so that children's play can be respected in itself. 본 연구는 거친 신체 놀이에 대해 유아가 어떠한 생각을 갖고 있는지 알아보기 위해 거친 신체 놀이의 유형별로 에피소드를 구성하여 만 5세 유아 90명을 대상으로 영상자료를 활용한 일대일 면담을 실시하였다. 연구결과 거친 신체 놀이에 대한 유아의 생각은 유형별로 답변 비율의 차이는 있었으나, 모든 유형에서 긍정적인 응답의 비율이 높았으며, 싸움 놀이 보다 일반적인 거친 신체 놀이를 더 긍정적으로 생각하고 있었다. 구체적으로 유아들은 거친 신체 놀이를 재미있는, 하고 싶은 놀이라고 표현하였다. 유아들이 거친 신체 놀이에 대해 긍정 또는 부정으로 생각하는 기준은 놀이 공간의 크기, 놀이의 물리적·사회적 위험성, 교사의 반응 3가지가 있었다. 첫째, 유아들은 놀이가 일어나기에 공간의 크기가 적합한지에 따라서 생각을 결정하였고, 둘째, 물리적·사회적 위험성에 따라 놀이 환경에 위험한 요소가 있는지, 거친 신체 놀이 행동이 상대 유아에게 해를 가하려는 의도가 있는지에 근거하여 판단하였다. 셋째, 교사의 반응에 따라 자신의 생각을 결정하는 것으로 유아들은 교사가 놀이에 대해 보이는 태도에 따라서 자신의 생각을 결정하였다. 본 연구는 유아의 관점에서 거친 신체 놀이에 대해 알아보았다는 의의가 있고, 유아의 놀이가 그 자체로 존중받을 수 있도록 도움을 제공했다는 데 시사점이 있다.

인터넷 동영상 콘텐츠 산업 정책과 내용규제 방안 모색

유승현 한국방송학회 2016 한국방송학회 학술대회 논문집 Vol.2016 No.04