• Human Ecology Research
• /
• 제61권3호
• /
• pp.297-318
• /
• 2023

The purpose of this study was to develop a high school home economics financial consumer education program based on backward design and validation by experts. The program was designed and developed by first selecting learning content elements through a review of existing research and an analysis of relevant literature. The next step was to categorize these elements into seven themes and apply the backward design instructional design model 2.0. The program was prepared in the form of a 21st teaching-learning course plan and workbook and was verified by nine home economics teachers with working experience in high school. The evaluation revealed that the average value for all questions was 3.81 (out of 4 points) and the CVR was .99, indicating that the program was valid. In addition, positive evaluations were received in terms of learning goals, content level, and learner participation by class. This study has significance in that a systematic financial consumer education program was developed by Education of Home Economics to improve the financial literacy of high school students. It can therefore be used as an elective course (mini-course) in Home Economics in the high school credit system. A follow-up study will be required to assess the improvement in financial literacy after implementing this program.

• International Journal of Computer Science & Network Security
• /
• 제23권10호
• /
• pp.115-128
• /
• 2023

Deep learning has been incorporating various optimization techniques motivated by new pragmatic optimizing algorithm advancements and their usage has a central role in Machine learning. In recent past, new avatars of various optimizers are being put into practice and their suitability and applicability has been reported on various domains. The resurgence of novelty starts from Stochastic Gradient Descent to convex and non-convex and derivative-free approaches. In the contemporary of these horizons of optimizers, choosing a best-fit or appropriate optimizer is an important consideration in deep learning theme as these working-horse engines determines the final performance predicted by the model. Moreover with increasing number of deep layers tantamount higher complexity with hyper-parameter tuning and consequently need to delve for a befitting optimizer. We empirically examine most popular and widely used optimizers on various data sets and networks-like MNIST and GAN plus others. The pragmatic comparison focuses on their similarities, differences and possibilities of their suitability for a given application. Additionally, the recent optimizer variants are highlighted with their subtlety. The article emphasizes on their critical role and pinpoints buttress options while choosing among them.

• 한국안전학회지
• /
• 제39권3호
• /
• pp.60-67
• /
• 2024

This study aimed to identify challenges faced by occupational health and safety education institutions to derive and propose methods of improving occupational health and safety education. To achieve this, 13 personnel responsible for occupational health and safety education institutions were interviewed, resulting in the identification of 14 areas for improvement. Consequently, a survey was developed and conducted among 107 individuals from 195 occupational health and safety education institutions. The priorities of the 14 items were analyzed using methods such as the content validity ratio (CVR), paired t-test, locus for focus model, Borich's needs assessment, and effect size (Cohen's d). The research results highlighted significant challenges, including the importance of mitigating abnormal competition among occupational health and safety education institutions, improving awareness among employers and workers regarding the importance of occupational health and safety education, and developing programs that satisfy customer demands.

• 공학교육연구
• /
• 제16권3호
• /
• pp.28-41
• /
• 2013

The purpose of this study was to develop the Meta-Evaluation Criteria which can comprehensively and systematically evaluate and improve the Accreditation Evaluation System for Engineering Education. This will provide useful implications for establishing value, direction, and improvement remedy for Engineering Educations Accreditation System of Korea. In order to achieve the purpose of this study, Meta-Evaluation Criteria was developed to comprehensively and systematically assess and analyze the Accreditation Evaluation System of Engineering Education. The research methodology used to study these subjects: literature review, interviews with experts, Delphi survey (three times), survey, analysis of narrative opinion and secondary source. The results and conclusions of this study can be summarized as follows: First, the final Meta-Evaluation Criteria were developed so as to comprehensively and systematically assess and analyze the Accreditation Evaluation System of Engineering Education. The criteria's validity and reliability were also identified. Specific details are as follows: In a draft plan of the Meta-Evaluation Criteria, Meta-Evaluation concept was defined as evaluation on the whole range of Accreditation Evaluation System of Engineering Education. Meta-Evaluation Criteria was designed to be based on a systematic approach and applies the phased approach to the lower component to reflect evaluation's characteristics. Then validity and reliability of the developed draft plan was verified by calculating Content Validity Ratio (CVR), Degree of Consensus, Degree of Convergence and Cronbach's alpha. The final developed Meta-Evaluation Criteria obtaining validity and reliability were composed of 5 evaluation areas (environment, input, performance, result, utilization), 15 evaluation items, 68 evaluation indicators.

• 한국세라믹학회지
• /
• 제44권8호
• /
• pp.445-450
• /
• 2007

A conversion layer of SiC was fabricated on the graphite substrate by a chemical vapor reaction method in order to enhance the oxidation resistance of graphite. The effect of boron carbide containing powder bed on the morphology of SiC conversion layer was investigated during the chemical vapor reaction of graphite with the reactive silicon-source at $1650^{\circ}C\;and\;1700^{\circ}C$ for 1 h. The presence of boron species enhanced the conversion of graphite into SiC, and altered the morphology of the conversion layer significantly as well. A continuous and thick SiC conversion layer was formed only when the boron source was used with the other silicon compounds. The boron is deemed to increase the diffusion of SiOx in SiC/C system.

• 한국세라믹학회지
• /
• 제52권6호
• /
• pp.429-434
• /
• 2015

This study investigates the macroscopic wear behaviors of C/C and C/C-SiC composites coated with hafnium carbide (HfC). To improve the wear resistance of C/C composites, low-pressure chemical vapor deposition (LPCVD) was used to obtain HfC coating. The CVD coatings were deposited at various deposition temperatures of 1300, 1400, and $1500^{\circ}C$. The effect of the substrate material (the C/C substrate, the C/C-CVR substrate, or the C/C-SiC substrate deposited by LSI) was also studied to improve the wear resistance. The experiment used the ball-on-disk method, with a tungsten carbide (WC) ball utilized as an indenter to evaluate the wear behavior. The HfC coatings were found to effectively improve the wear resistance of C/C and C/C-SiC composites, compared with the case of a non-coated C/C composite. The former showed lower friction coefficients and almost no wear loss during the wear test because of the presence of hard coatings. The wear scar width was relatively narrower for the C/C and C/C-SiC composites with hafnium coatings. Wear behavior was found to critically depend on the deposition temperature and the material. Thus, the HfC-coated C/C-SiC composites fabricated at deposition temperatures of $1500^{\circ}C$ showed the best wear resistance, a lower friction coefficient, and almost no loss during the wear test.

• 한국조경학회지
• /
• 제45권4호
• /
• pp.54-61
• /
• 2017

노거수의 보호 및 관리는 도시 유적 보존에 매우 중요하다. 노거수의 위험인자에 대한 위험도를 평가하면 정확한 보호대책을 수립할 수 있다. 본 연구는 노거수의 위험도 평가지표를 개발하기 위하여 델파이 기법을 이용하여 4차례에 걸쳐 설문조사를 실시하고, 관련 분야 전문가의 의견을 수렴하였다. 1, 2차 설문 과정 중에 필요한 지표를 추가하고, 2, 3차에서 중요도, 수렴도, 합의도 등 정상범위 밖에 있는 지표를 제외하였다. 최종 분석 결과, 위험도는 자체노화, 생육환경, 수목병해충, 토양상황, 관리 상태 5개 분야 총 41개 지표가 도출되었다. 연구 결과는 노거수의 위험도를 산정하기 위한 평가지표를 도출하는데 기초자료로 활용될 수 있다.

• 농촌지도와개발
• /
• 제19권4호
• /
• pp.905-959
• /
• 2012

이 연구의 목적은 농업인 교육자에게 필요한 농기업 경영 컨설팅 능력을 도출하고, 농기업경영컨설팅능력에 적절한 수업방법, 평가기준을 도출하며, 이들 결과를 기초로 교과목과 과목별 내용, 수업방법과 평가기준을 제시함에 있다. 이를 위하여 문헌과 인터넷검색을 통하여 도출된 농기업경영컨설팅능력을 검토할 수 있는 조사도구를 만든후 전문가집단 17명을 대상으로 한 Delphi연구를 통하여 수행되었다. 델파이 조사 결과는 평균점수와 표준편차, CVR값을 분석하여 적절한 항목을 선정하였다. 이를 기초로 농기업경영컨설팅능력을 구성하고, 이들 각 영역에 해당하는 교과목을 만들었으며, 교과목에 적절한 수업방법과 평가기준을 도출하여 제시하였다. 또한 이들 교육과정을 활용할 때 고려하여야 할 부분과 추가적인 연구에 대한 제언을 제시하였다.

• 한국세라믹학회지
• /
• 제36권1호
• /
• pp.21-29
• /
• 1999

흑연 기판에 탄화규소 전환층을 형성하는데 있어서 기판의 밀도와 기공 크기 분포의 영향이 조사되었다. 전환층형성을 위한 화학 반응은 기판의 표면 또는 표면 하부에서 SiO 기체의 침투를 통해 이루어졌다. 전환 공정 동안 기판 표면에서의 충분한 양의 SiO 기체 침투 및 연속적인 화학반응에 요구되는 기공크기 분포는 1.0~10.0$\mu\textrm{m}$ 범위인 것으로 추정되엇다. 유한요소법에 의한 탄화규소 층의 응력 해석에서는 열적 불일치에 기인하는 잔류응력 분포를 나타냈다. 그러나. X-선 회절에 의해 탄화규소 층에서는 압축응력이 측정되었으며, 탄화규소 층에서의 잔류응력 분포에 대해 SiC 층과 흑연 기판간의 interlayer의 constraining 효과, 전환층의 치밀화 거동 및 입자성장에 의해 주로 영향받는 것으로 추정되었다.

• Journal of Information Technology Applications and Management
• /
• 제21권2호
• /
• pp.81-98
• /
• 2014

Recently, due to external environment like the changes in health policy and various healthcare accreditations, along with hospital's internal efforts to improve the quality of medical services, demands for the development of medical information systems are increasing. Some examples are clinical information like DUR (Drug Utilization Review), CVR (Critical Value Report), and automatic benefit processing by treatment purposes, or hospital DSS (Decision Support System) on overall medical practice. Such systems act as a guide in making clinic judgments during practice or in other medical practice, and their effects on the medical treatment improvements are being proven by previous studies. In the reality of increasing attention in the effects of medical treatment improvement, studies related to hospital DDS were mostly focused on clinical, technical, and engineering points of view, and studies focusing on the user viewpoint are very limited. In order to verify the effects of DSS on practice improvements and hospital's management performance, this study used a research model constructed to verify how SERVQUAL of hospital DSS affects hospital management performance in BSC (Balanced Score Card) point of view. To empirically verify the research model, a questionnaire was conducted on the basis of "K-University Hospital's DSS" on clinicians and hospital employees related to system development, and the relationships between the factors were analyzed through path analysis. As a result of path analysis, excluding reactivity, tangibility, confidence, reliability, empathy among service qualities, had partially significant effects on management performance factors (learning and growth, internal process, financial affairs). This study is to prepare the theoretical ground on the management performance analysis of hospital DSS, and suggest the service quality of the system that should be considered in the planning and development stages for improved system.