• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권2호
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• pp.671-686
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• 2020

Due to the long training time and high training cost of traditional surgical training methods, the emerging virtual surgical training method has gradually replaced it as the mainstream. However, the virtual surgical system suffers from poor authenticity and high computational cost problems. For overcoming the deficiency of these problems, we propose an optimized model for the local compression deformation of soft tissue. This model uses a simulated annealing algorithm to optimize the parameters of the soft tissue model to improve the authenticity of the simulation. Meanwhile, although the soft tissue deformation is divided into local deformation region and non-deformation region, our proposed model only needs to calculate and update the deformation region, which can improve the simulation real-time performance. Besides, we define a compensation strategy for the "superelastic" effect which often occurs with the mass-spring model. To verify the validity of the model, we carry out a compression simulation experiment of abdomen and human foot and compare it with other models. The experimental results indicate the proposed model is realistic and effective in soft tissue compression simulation, and it outperforms other models in accuracy and real-time performance.

• Current Optics and Photonics
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• 제5권3호
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• pp.270-277
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• 2021

The adaptive sparse representation (ASR) can effectively combine the structure information of a sample dictionary and the sparsity of coding coefficients. This algorithm can effectively consider the correlation between training samples and convert between sparse representation-based classifier (SRC) and collaborative representation classification (CRC) under different training samples. Unlike SRC and CRC which use fixed norm constraints, ASR can adaptively adjust the constraints based on the correlation between different training samples, seeking a balance between l₁ and l₂ norm, greatly strengthening the robustness and adaptability of the classification algorithm. The correlation coefficients (CC) can better identify the pixels with strong correlation. Therefore, this article proposes a hyperspectral image classification method called correlation coefficients and adaptive sparse representation (CCASR), based on ASR and CC. This method is divided into three steps. In the first step, we determine the pixel to be measured and calculate the CC value between the pixel to be tested and various training samples. Then we represent the pixel using ASR and calculate the reconstruction error corresponding to each category. Finally, the target pixels are classified according to the reconstruction error and the CC value. In this article, a new hyperspectral image classification method is proposed by fusing CC and ASR. The method in this paper is verified through two sets of experimental data. In the hyperspectral image (Indian Pines), the overall accuracy of CCASR has reached 0.9596. In the hyperspectral images taken by HIS-300, the classification results show that the classification accuracy of the proposed method achieves 0.9354, which is better than other commonly used methods.

• 대한화학회지
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• 제65권2호
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• pp.133-144
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• 2021

초중등 과학교사들은 인성교육의 필요성을 인지하고 있지만 평가, 경쟁적 분위기, 과중한 업무, 시간 부족의 이유로 인성교육을 실천하는데 어려움을 느끼고 있다. 이러한 선행 연구들은 실제로 인성교육을 수업에 적용한 경험이 없는 교사를 대상으로 한 것이 대부분이다. 인성교육 프로그램을 수업에 적용한 경험이 있는 교사들에 대한 연구가 많지 않기 때문에 실제로 과학 수업에서 인성교육 프로그램을 적용했을 때 발생하는 문제와 제안점을 논의하는 연구가 흔치 않다. 이 연구는 선행연구에서 그 효과가 논의된 인성역량 함양을 위한 협력적 문제해결(CoProC; Collaborative Problem-Solving for Character Competence) 프로그램을 수업 현장에 적용한 교사들의 실천에 대한 것이다. 과학 수업에 CoProC 프로그램을 적용한 5명의 교사가 연구에 참여하였다. CoProC 프로그램 수업에 참여한 학생들의 인성역량 성취도와 교사들의 두차례 인터뷰를 분석하여 결과를 도출하였다. 연구결과에 따르면 교사의 일반 교직 경력보다는 CoProC 프로그램에 대한 연수, 개발, 수업 경험이 학생의 인성역량 성취에 영향을 미치고, CoProC 프로그램의 목적에 대한 교사의 이해가 수업에서 어려움, 평가, 피드백에 영향을 미친다.

• 디지털융복합연구
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• 제14권5호
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• pp.1-10
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• 2016

새로운 제도나 경영전략 등이 성공적으로 정착되어 조직의 성과제고로 연계되기 위해서는 내재화과정이 반드시 필요하다. 성공적인 내재화를 위해서 많은 기관에서 가장 많이 활용하는 방법은 교육방법 및 커뮤니케이션 전략이라고 할 수 있다. 그러나 교육이나 커뮤니케이션을 원활하게 진행하기 위해서는 조직구성원들간 신뢰와 협력지향적인 문화 등 다양한 측면에서의 융합전략이 뒷받침되어야만 한다. 본 연구에서는 특정 공공기관의 직원들을 대상으로 새로이 도입한 조직비전, 핵심가치 등에 대한 내재화 정도 및 조직문화 등에 대해 조사해보고, 성공적인 경영전략 내재화 방안을 제시하고자 하였다. 우선, 경영전략 강화 교육을 위해서는 반복학습을 통해 자주 노출시키고 자주 대화하는 방법이 효과적이다. 이를 위해 집합교육과 이러닝 등 집중적인 교육방법을 병행해야 한다. 둘째, 의사소통의 활성화를 위해서는 기관장이 직원들과의 내재화를 위한 의사소통에 관심을 기울여야 하며, 다양한 방법의 의사소통 전략을 세워야 할 것이다. 끝으로, 조직문화의 변화를 위해서는 동료들간 개방적이고 협조적인 문화구축을 위한 비공식적인 의사소통의 장을 자주 마련하고 인적네트워크의 양적, 질적 확대를 지원해주어야 한다.

• Safety and Health at Work
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• 제9권2호
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• pp.172-179
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• 2018

Background: Insufficient training in infection control and occupational health among healthcare workers (HCWs) in countries with high human immunodeficiency virus (HIV) and tuberculosis (TB) burdens requires attention. We examined the effectiveness of a 1-year Certificate Program in Occupational Health and Infection Control conducted in Free State Province, South Africa in an international partnership to empower HCWs to become change agents to promote workplace-based HIV and TB prevention. Methods: Questionnaires assessing reactions to the program and Knowledge, Attitudes, Skills, and Practices were collected pre-, mid-, and postprogram. Individual interviews, group project evaluations, and participant observation were also conducted. Quantitative data were analyzed using Wilcoxon signed-rank test. Qualitative data were thematically coded and analyzed using the Kirkpatrick framework. Results: Participants recruited (n = 32) were mostly female (81%) and nurses (56%). Pre-to-post-program mean scores improved in knowledge (+12%, p = 0.002) and skills/practices (+14%, p = 0.002). Preprogram attitude scores were high but did not change. Participants felt empowered and demonstrated attitudinal improvements regarding HIV, TB, infection control, and occupational health. Successful projects were indeed implemented. However, participants encountered considerable difficulties in trying to sustain improvement, due largely to lack of pre-existing knowledge and experience, combined with inadequate staffing and insufficient management support. Conclusion: Training is essential to strengthen HCWs' occupational health and infection control knowledge, attitudes, skills, and practices, and workplace-based training programs such as this can yield impressive results. However, the considerable mentorship resources required for such programs and the substantial infrastructural supports needed for implementation and sustainability of improvements in settings without pre-existing experience in such endeavors should not be underestimated.

• 컴퓨터교육학회논문지
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• 제11권6호
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• pp.95-102
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• 2008

본 연구에서 SDG를 사용한 교육 퍼즐구현을 통하여 협동학습을 컴퓨터교육에 적용하였다. SDG란 하나의 컴퓨터 디스플레이에 다중 입력장치로 협동적인 작업을 할 수 있는 시스템을 말한다. SDG 기반의 협동학습을 통해 학습자들은 협동 학습을 수행하게 된다. SDG를 이용한 협동학습이 단일 디바이스를 이용한 개별 학습보다 우월하다는 기존의 연구가 있다. 이를 바탕으로 협동학습을 이용한 퍼즐게임을 구현하였다.

• 영어어문교육
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• 제15권2호
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• pp.245-259
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• 2009

The purpose of this study was to investigate English teachers' perceptions about doing their own action research to find out the benefits of involvement in action research. I believe that teachers should engage in curriculum research and development because it relates to their own classrooms and because a primary aim for teacher education program is to give teachers ways of exploring their own classrooms. I focused on 17 graduate students who had undertaken action research during the fall semester of 2007 and administered a questionnaire about their perceptions of doing action research. The results revealed that their perceptions of doing action research fell into the following two categories, positive and negative aspects. For positive aspects, they experienced a sense of personal and professional growth and they underwent identity transformation from passive, etic-oriented, and uncritical to active, emic-oriented, and critical teachers. However, many of them expressed that major obstacles to doing action research were time constraints and lack of skills or training in conducting action research. Thus, it is suggested that both pre- and in-service teachers should consider conducting a language teaching diary study, doing collaborative action research, and acquiring all the necessary skills for conducting action research.

• 교육시설 논문지
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• 제24권1호
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• pp.11-22
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• 2017

The main purpose of this research is to consider educational environment, concept, and spatial organization and its characteristic based on the early 20th century European child-centered educational philosophy. For this process, the study of the following have been done : 1) Literature review, which includes educational ideology, perspective of child development of Maria Montessori, Rudolf Steiner, Peter Peterson, and Celestin Freinet. 2) Comparisons of spatial organization and classrooms of schools operated with the educational philosophy of mentioned philosophers from above. These schools have classrooms(or multi-purpose space near classroom) contained self-directed individual learning space, group and collaborative learning space, and training space of practical life. These configuration of learning space intended 1) learning based on individual child's interest, experience 2) developing of responsibility based on freedom 3) sociality and community spirit of children.

• Journal of Information Technology Applications and Management
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• 제27권6호
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• pp.141-151
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• 2020

The job mismatch between job seekers and SMEs is becoming more and more intensifying with the serious difficulties in youth employment. In this study, a bi-directional content-based metric learning model is proposed to recommend suitable jobs for job seekers and suitable job seekers for SMEs, respectively. The proposed model not only enables bi-directional recommendation, but also enables HR matching without relearning for new job seekers and new job offers. As a result of the experiment, the proposed model showed superior performance in terms of precision, recall, and f1 than the existing collaborative filtering model named NCF+GMF. The proposed model is also confirmed that it is an evolutionary model that improves performance as training data increases.

• 한국IT서비스학회지
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• 제22권1호
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• pp.1-14
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• 2023

This paper aims to share the course, performance and implications of Project-Based Learning (PBL) education in healthcare data science (HDS). The HDS team of the business group of Soonchunhyang University, which was selected for the health care field of 'University Innovation Project', considered that the health care IT-based education of the current university differs greatly from the rapidly changing health care 3.0 environment of the fourth industry, and emphasized the PBL practice-oriented specialization program as a learning model. The PBL focused on self-directed learning experiences, real analysis problems, and team-oriented classes. In other words, it was implemented with three specialized strategies: 'Field Inside Education', 'Fusion-type Track Education', and 'Training to strengthen resilience and change response'. This collaborative, practical learning experience, etc. resulted in significant results. The results were recognized as being rated A by the Korea Research Foundation and the comprehensive evaluation, and the results were significantly elevated through the analysis of the student survey and the results index.