• Biomolecules & Therapeutics
• /
• v.25 no.6
• /
• pp.659-664
• /
• 2017

Although lisdexamfetamine is used as a recreational drug, little research exists regarding its potential for dependence or its precise mechanisms of action. This study aims to evaluate the psychoactivity and dependence profile of lisdexamfetamine using conditioned place preference and self-administration paradigms in rodents. Additionally, biochemical techniques are used to assess alterations in the dopamine levels in striatal synaptosomes following administration of lisdexamfetamine. Lisdexamfetamine increased both conditioned place preference and self-administration. Moreover, after administration of the lisdexamfetamine, dopamine levels in the striatal synaptosomes were significantly increased. Although some modifications should be made to the analytical methods, performing high performance liquid chromatography studies on synaptosomes can aid in predicting dependence liability when studying new psychoactive substances in the future. Collectively, lisdexamfetamine has potential for dependence possible via dopaminergic pathway.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2009.11a
• /
• pp.3-7
• /
• 2009

Construction projects are being the skyscraper and the large size by limited site condition and developing construction technology. Therefore, Steel structure work is steadily increasing caused by easy to work and structural safety. However, steel-frame work has the large incidence of heavy accident potentially. Recently a research group has recently developed newly designed self-supported steel joint for enhancing safety of steel erection work. Before applying the steel joint in a construction site, economic evaluation should be performed. Thus, we proposed the method for measuring economic efficiency of the new steel joint and verified economic feasibility of the steel joint method through a case study. As a result, Steel erection method using by self-supported steel joint showed economic rather than the one using by H-beams.

• International conference on construction engineering and project management
• /
• 2011.02a
• /
• pp.229-233
• /
• 2011

Recently, the scale of buildings has been increasing because of the high-rise trend and complexity of underground spaces. A significant number of steel structures have therefore been adopted for building construction. Since workers need to work in high places to install steel beams, many industrial accidents easily occur during steel-frame work. Furthermore, considering the increasing trend of building steel structures, the safety of the workers during the steel beam erection work is of concern. To improve the safety, a new type of joint, located between the steel column and beam, which can eliminate the need for working at the elevated height during steel beam erection has been developed in Korea. Using the newly developed technology in the construction field, the safety performance needs to be evaluated. This study presented the safety evaluation approach for the newly developed technology from the literature review, and applied the method to a self-supported steel joint. The result showed that applying the self-supported steel joint improved the safety of the steel erection work in terms of working posture, working environment, and risk exposure time.

• Journal of Gifted/Talented Education
• /
• v.23 no.6
• /
• pp.1077-1098
• /
• 2013

Science gifted students enrolled in a program, where classes had either explicit or implicit instruction about self-directed learning, were asked to write what was satisfying after each class. This process was part of the evaluation of the program. Students' descriptions related to self-directed learning are compared in these two classes, one with explicit instruction and the other with implicit instruction. First, most of the components related to self-directed learning, which were reported in the previous research articles, were mentioned in students evaluation. If there was any specific description regarding what was satisfying, there were components of self-directed learning. Students descriptions were consistent with list of self-directed learning components, which was constructed based on the previous research. Therefore it may be concluded that students recognized most of the reported self-directed learning components and satisfied with them. Second, There were differences in the evaluation of two types of classes. The evaluation of class with explicit instruction contained more self-directed learning components more frequently. For example, students worked in small groups in both classes. However more students mentioned small groups in classes with explicit instruction. As a result the explicit instruction appears to be more effective for students to recognize the self-directed learning components. However some of the components mentioned in classes with implicit instruction were not mentioned in the classes with explicit instruction. Therefore classes with explicit and implicit instructions are complimentary with each other and both instructions are necessary.

• Journal of Digital Convergence
• /
• v.19 no.10
• /
• pp.189-194
• /
• 2021

This study was conducted with the purpose of examining the moderating effect of hope between fear of negative evaluation and self-esteem of workers. For this purpose, a total of 34 workplaces located in Seoul, Daejeon, and Chungcheong were selected and surveyed, and a total of 301 copies of the collected questionnaires were analyzed excluding unfaithful responses. The collected data were subjected to correlation analysis, and regression analysis of moderating effect. The research results are as follows. First, fear of negative evaluation did not show a significant correlation with other variables. However, there was a significant positive correlation between the remaining variables. Second, as a result of regression analysis of moderating effect, the moderating effect of agency thinking of hope was identified between fear of negative evaluation and self-esteem. However, the moderating effect of the pathway thinking of hope has not been identified. Finally, based on this study, we discussed ways to increase the self-esteem that was lowered due to the fear of negative evaluation, and specifically suggested program development and policies using hope.

• The Journal of the Korea Contents Association
• /
• v.22 no.6
• /
• pp.701-711
• /
• 2022

This study tried to examine the relationship between superior leadership and emotional support from co-workers on task performance through performance evaluation fairness and self-efficacy in order to find factors that affect the task performance of a company in an uncertain market environment. For this purpose, 500 copies of questionnaire data were collected from corporate employees, and the research hypothesis was verified using Smart PLS 3.0. As a result of the study, superior leadership and emotional support from co-workers showed a positive (+) effect individually on the fairness of employee performance evaluation, Performance evaluation fairness showed a positive (+) effect on self-efficacy. Through this study, it was found that the fairness and self-efficacy of the performance evaluation accepted by employees affects work performance, providing a theoretical foundation for subsequent researchers. Practical implications are suggested to inspire employees to take on a challenge by managing them properly. In future research, based on the results of this study, various studies are needed on the factors that an organization must have for task performance.

• The Korean Journal of Archival Studies
• /
• no.65
• /
• pp.151-197
• /
• 2020

The records management evaluation system is a system operated by the National Archives of Korea since 2007 based on the 「Public Records Management Act」. As the environment of public records management changes dramatically, there is a growing perception that fundamental improvement is necessary in the operation of this evaluation system. In particular, it is required that the most emphasized area is the customized methods based on the type and characteristics of the institutions. This study focused on the self-evaluation method, which aims to strengthen the autonomous evaluation capability of institutions as a new records management evaluation system in public institutions. In particular, the needs to change toward the self-evaluation method is described in relation to the diversity of the institutions to be evaluated, the specificity of the organizational structure of the archives, and the hierarchy and individuality of the institutions. A self-evaluation system (draft) was designed by which an institution diagnoses the records management work by itself, which aims to improve the level of performance. It also covered the development of evaluation items and indicators, the step-by-step application, and the legal and operational aspects to run the records management evaluation system in phases in public records management practices.

• Journal of Korean Elementary Science Education
• /
• v.24 no.2
• /
• pp.174-182
• /
• 2005

The purpose of this study was to analyze the professionalism of elementary school teachers and to draw out factors which elementary teachers should try to improve their professionalism for environmental education. For the study, both Quantitative analysis and qualitative methodologies were applied: First, randomly selected 483 elementary teachers from Seoul and Gyeonggi self responded to 5 evaluation areas by Hungerford et al. (1994) to evaluate their environmental education professionalism through the use of five point Likert scale. Second, 2 elementary teachers' environmental classes were observed for the purpose of analyzing strengths and weaknesses in classroom instruction, and then the results of self-evaluation on environmental education professionalism and teacher professionalism as shown in the classes were compared. It was found that 483 elementary teachers including 2 teachers fer analyzing classroom instruction who performed a self-evaluation gave themselves mid-scores on the Hungerford et al.'s 5 evaluation areas. However, the result of self-evaluation did not correspond with the result of actual class observation and teacher interview. That is, the actual environmental classes conducted by 2 teachers did not seemed to reflect the evaluation areas which were the foundation of the study: the conceptual awareness, the investigation & evaluation, environmental action skills, and educational application. The results of this study can be used as the basis reference to develop teaching-learning program and in-service programs for professional development of teachers for successful application of environmental education in elementary school classes.

• Korean Journal of Child Studies
• /
• v.24 no.6
• /
• pp.117-131
• /
• 2003

This study investigated the effects of Child Care and Teaching(CCT) practice on student teachers'(N=361) perceived Efficacy for Child Care an Teaching(ECCT), including relationships between ECCT and generalized self-efficacy. Instruments were the ECCT scale, the generalized self-efficacy scale, and self-evaluation concerning CCT. Research design consisted of pre-test, CCT practices. and post-test. Results showed that ECCT scores increased after CCT practice: ECCT was related with generalized self-efficacy and to self-evaluation concerning CCT. These findings suggested that CCT experience is important to student teachers' perceived ECCT, and ECCT, in turn, is a predictor of actual CCT behavior.

• Research in Community and Public Health Nursing
• /
• v.17 no.4
• /
• pp.573-582
• /
• 2006

Purpose: To find out whether the self-care ability measurement used for visiting health care provide an appropriate standard to select service methods using a Delphi survey and to offer basic data that can improve the measurement. Method: A Delphi survey was done with 39 people consisting of theoretical professionals, field managers, and practitioners engaged in visiting health care. Result: It was found that items and weighted points in the currently used self-care ability measurement needed adjustment. Therefore, a modified evaluation standard was presented by domains, items and detailed items. Finally, the self-care ability measurement is composed of 4 domains, 11 items and 19 detailed items. Conclusion: This study is significant in that it presented an evaluation standard applicable directly to business practice by supplementing problems in the existing self-care ability measurement. This study suggests the need to develop various measurements for elderly households based on community.