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‘생태계’를 주제로 한 협력적 소집단 표상화 활동에서 나타난 고등학생들의 인식론적 메시지와 시스템 사고의 관계
이경현 ( Kyunghyun Lee ),김희백 ( Heui-baik Kim ) 한국생물교육학회 2021 생물교육 Vol.49 No.2
This study investigates how the epistemological message of high school students appearing in cooperative small-group activities on the theme of ecosystems related to the creation of a context that high level of system thinking appeared. In a small group of three 10th-grade students, classes included the tasks of cooperatively constructing representations such as tables and pictures on the theme of the ecosystem. The research results showed that students’ epistemological message and system thinking appeared simultaneously. And also, when they articulated a high level of the epistemological message, they tended to use a high level of system thinking. The activity of visualizing and integrating ecosystems into pictures encouraged a commitment to context, in which students focus on explaining ecosystem phenomena more and promoting high-quality epistemological messages and systems thinking. In addition, the visibility of the ecosystem presented in the task was found to be another factor that triggered high-level system thinking by enriching the claims and evidence presented by students. Several strategies were discussed to promote students’ systems thinking.
생태계의 단계적 외적표상화 과정에서 나타난 고등학생들의 시스템사고 발달
이경현 ( Kyunghyun Lee ),한문현 ( Moonhyun Han ),김희백 ( Heui-baik Kim ) 韓國生物敎育學會 2016 생물교육 Vol.44 No.3
This study aims to investigate the system thinking development of high school students through their construction of external representations of an ecosystem. Thirty-five eleventh grade students carried out a step-bystep task designed to facilitate their system thinking by constructing external representations. The study shows that the task helped the students to develop their system thinking. First, the students were encouraged to focus on the critical factors of an ecosystem through co-reflection of their representations. Second, this heightened focus allowed the students to consider various elements of the system at the micro-level. Third, as the students organized the relationship between various elements through their drawings, they began to comprehend relatedness among the elements. Lastly, as the students continued to re-position the structure and relationship of the system, they got to recognize the cyclic aspect of the complex system. The process of constructing external representations facilitated students’ reflection on their thinking by visualizing the relationships of the elements and minimizing their cognitive load. External representations were utilized as cognitive tools for system thinking and contributed to the ability of the students to think. However, lack of related ecological knowledge seemed to constrain students from applying their system thinking to other contexts. Some strategies to facilitate the students’ system thinking were discussed.
《모단정(牡丹亭)》에서 당시(唐詩) 집구(集句)의 의미-명대(明代)의 당시열(唐詩熱)과의 상관관계를 중심으로
이경현 ( Lee Kyunghyun ) 한국중국어문학회 2016 中國文學 Vol.86 No.-
湯顯祖는 장편희곡 《牡丹亭》을 창작하면서, 매 척의 내용을 요약하면서 마무리 하는 역할을 하는 下場詩를 모두 唐詩의 구절을 모은 집구시의 양식으로 지었다. 본고에서는 이러한 選詩의 양상을 明代 문단의 시적 경향에 견주어 고찰하고, 《모란정》의 唐詩 集句가 尊唐熱이 있었던 明代 문단과의 소통의 한 양상임을 규명하였다. 그 결과, 《모란정》의 唐詩 集句에서 드러나는 특징은 크게 세 가지로 정리할 수 있다. 첫째, 탕현조가 唐詩 선집이 유행하던 동시대 문단의 尊唐 경향에 표면적으로 동조의 포즈를 취했다는 점이다. 둘째, 前後七子가 중심이 된 復古派의 시론에서 唐詩 존숭의 핵심을 이루는 “性情”의 회복을 집구의 과정에서 적극적으로 활용하였다. 셋째, 희곡 내에서 唐詩를 집구하는 것은 탕현조가 동시대의 시단에 참여하는 방식이었다는 점이다. 탕현조는 동시대 시단의 주류인 복고 담론에 불만을 품고 있었지만, 그들의 唐詩 숭배열을 외부에서 비판하거나 무시하지 않았다. 그대신 문자 권력의 場 속으로 자신을 던져 넣고, 그 안에서 자신만의 독자적인 방식을 주조하는 방식을 취하였다. 이로써 희곡 텍스트 내에서 이들과의 내적인 연관성을 마련하고자 하였다. 과거의 전범을 반복함으로써 표현을 속박하는 것이 아니라, 이미 있는 것으로부터 새로운 언어의 질서를 만들고자 한 것이다. 이로써 당시 문단을 장악하고 있던 복고파의 시론과는 일정한 거리를 형성하고, 동시대 숭배열의 편협함을 조정해나갔다.
이경현 ( Kyunghyun Lee ),오상화 ( Sanghwa Oh ) 한국수처리학회 2023 한국수처리학회지 Vol.31 No.1
To enhance water quality standards, the removal of nitrogen (N) and phosphorus (P) has required additional chemical treatment in wastewater treatment plants. This demand has caused problems such as excessive chemical injection and an increase in the amount of sludge production. To deal with these problems, this study investigated the efficiency of electrochemical N and P removal from sewage wastewater and biologically treated water using aluminum and stainless steel (Al-SUS) electrodes in the existing sewage treatment method. The operating variables in this study are the reaction time and current density of the electrode. Overall, the longer the reaction time and the higher the current density, the greater the tendency for BOD, TN, and TP removal efficiency. However, TP concentration in effluent was ≤ 0.1 mg/L regardless of the reaction time when the current density was ≥ 5 mA/㎠, and ≤ 0.06 mg/L regardless of the current density when the reaction time was 10 min. The TN concentration in the effluent increased as the current density and reaction time increased. Furthermore, biologically treated effluent was found to be additionally removed by approximately 64-70%, up to 0.8 mg/L. Consequently, the economic current density using aluminum electrodes for TN and TP treatment from domestic wastewater was ≤ 5 mA/㎠ for a reaction time of 3 min. N and P removal process using aluminum electrodes has little impact on temperature and can be applied to the biologically treated wastewater. Therefore, the process could be implemented in small-scale wastewater treatment plants or where it is difficult to secure a large site.
초기 성인기의 외상 경험과 외상 후 스트레스 증상 및 정신건강 관련 특성과의 관계
이경현 ( Lee Kyunghyun ),조혜경 ( Jo Hyekyung ),김선아 ( Kim Sunah ) 한국간호과학회 정신간호학회(구 대한간호학회정신간호학회) 2018 정신간호학회지 Vol.27 No.2
Purpose: The purpose of this study was to investigate the level of traumatic experiences, posttraumatic stress symptoms and mental health-related characteristics in young adults and identify relationships among the variables. Methods: In this descriptive cross-sectional study, data were collected through a Web-based survey (N=568). Structured instruments included valid measures of traumatic experiences, posttraumatic stress symptoms, depression, somatization symptoms, insomnia, and alcohol use. Collected data were analyzed using descriptive statistics, t-tests, x<sup>2</sup> tests, ANOVA, and Pearson correlation coefficient with SPSS statistics 23. Results: Among study participants, 76.8% reported traumatic experiences. The severity of trauma was associated with high levels of posttraumatic stress symptoms, depression, somatization symptoms, insomnia, and alcohol use. Women showed more severe posttraumatic stress and depressive symptoms than men. There were positive correlations for trauma experiences with posttraumatic stress symptoms, depression, somatization symptoms, and insomnia. Conclusion: Findings indicate the need to develop nursing intervention programs to relieve posttraumatic stress symptoms and improve mental health related characteristics targeting young adults, and to establish a national policy that addresses characteristics of trauma experienced in Korea.
인지정서행동집단상담 프로그램이 간호대학 신입생의 자기효능감과 대학생활적응에 미치는 영향
이경현(Lee, Kyunghyun),김명아(Kim, Myungah) 한국간호교육학회 2018 한국간호교육학회지 Vol.24 No.4
Purpose: This purpose of this study was to examine the effects of a rational emotive behavior therapy (REBT) counseling program on self-efficacy and adjustment to college life for nursing freshmen. Methods: This study used a nonequivalent control pretest-posttest quasi-experimental design. Thirty-eight new nursing students were randomly assigned to either an experimental group (n=18) or a control group (n=20) recruited from a four-year nursing college. An REBT counseling program was composed of 8 group sessions of orientation, understanding the theory of REBT, finding irrational beliefs, internalizing rational beliefs, and closing over a duration of 5 weeks. The duration of each session was 90 minutes. Self-efficacy and adjustment to school life were measured by the Sherer’s Self-Efficacy Scale and Baker & Siryk`s Student Adjustment to College before and after the REBT counseling program. Data were analyzed using t-tests and paired t-tests. Results: The experimental group showed a significant improvement in self-efficacy compared to the control group. There was no significant change in college life adjustment between the experimental and control groups. Conclusion: An REBT counseling program could be applied as an effective program in enhancing self-efficacy resulting in positive and goal-oriented behavior for new nursing students in college.