• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.3
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• pp.45-54
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• 2009

This study was developed the metallic plate for bone fixation in the neurosurgery and general surgery and plates has a finn place in bone operating and treatment. The plates can be realized to bending strength and stiffness for strength estimation. Maximum point of bending curves has a bending point(P) with maximum load which to applied nearly 0.2% offset displacement. The device's sizing has a ${\Phi}13$ and ${\Phi}18$, and algorithm of strength estimation compared a plate(${\Phi}13$, ${\Phi}18$, ${\Phi}13-{\Phi}18$). The bending strength of the curved metallic plate has to evaluate maximum of a 311N, 387N, 410N, 474N. When a displacement preserve with a load, tensile stress through to press a plate is 274N, 324N, 382N, 394N. The algorithm of strength estimation can be used to support estimation of bending strength and stiffness. Their tool bring to settlement in the new basic algorithm for evidence with varied adjustment.

• Journal of Engineering Education Research
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• v.24 no.1
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• pp.3-14
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• 2021

The purpose of this study is to analyze the characteristics of efficient problem-solving teams and inefficient problem-solving teams using SYMLOG. In this study, 35 college students majoring in engineering education at C university were organized into 7 teams and carried out technological problem solving projects over one semester. Based on the results of the team project, the top 2 teams were defined as efficient problem solving teams and the bottom 2 teams were defined as inefficient problem solving team, and analyzed the characteristics of the team using SYMLOG. The main results are as follows: First, an analysis of SYMLOG from efficient problem solving teams and inefficient problem solving teams showed that there was a difference between self-awareness and others' perception in terms of U(Upward)-D(Downward) dimension. Second, in the inefficient problem solving teams, there was a significant difference between self-awareness and others' in the F(Forward)-B(Backward) dimension. Third, there was no difference between self-awareness and others' in both efficient and inefficient teams at the P (Positive)-N(Negative) dimension. Fourth, an efficient problem-solving team had a clear leader, and there was a team member who supported the leader. On the other hand, the inefficient problem-solving team did not have a clear leader, or one person played the role of leader and there were no team members supporting the leader.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.23 no.2
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• pp.15-20
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• 2023

Recently, digitalization is accelerating in all industries, and the use of information and personal information produced and used in the process of it is very important for the success or failure of a company. However, malicious attempts to steal or leak major information and personal information of a company as an adverse effect continue to increase, and appropriate defense and response are absolutely necessary. However, in the case of small and medium-sized enterprises, the priority of information protection and the possession of professional manpower are very insufficient compared to large enterprises. This paper studies the certification and audit implemented in Korea, and suggests ways to expand the certification of the information protection system suitable for SMEs and improve the effectiveness of the support system through the expansion of the privacy law notification standard and operation of support system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.23 no.2
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• pp.185-191
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• 2023

To the exact cover problem that remains NP-complete to which no polynomial time algorithm is made available, this paper proposes a linear time algorithm that yields an optimal solution. The proposed algorithm makes use of the set cover problem's major feature which states that "no identical element shall be included in more than one covering set". To satisfy this criterion, the proposed algorithm initially selects a subset with the minimum cardinality and deletes those that contain the cardinality identical to that of the selected subset. This process is repeatedly performed on remaining subsets until the final solution is obtained. Provided that the solution is unattainable, it selects subsets with the maximum cardinality and repeats the same process. The proposed algorithm has not only obtained the optimal solution with ease but also proved its wide applicability on N-queens problems, hence disproving the NP-completeness of the exact cover problem.

• Journal of the Korean Society of Earth Science Education
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• v.12 no.1
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• pp.64-81
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• 2019

The purpose of this study is to analyze elementary science gifted students' characteristics of the thinking in the problem solving process through a MEA(Model Eliciting Activity)activity. The subjects of this study are 40 elementary science gifted students who passed the first screen for the admission to the science gifted education institute in P university in 2018. The MEA activity was 'Coffee cup challenge', which is to find the best way to place cup side and bottom to save paper in a given material. Three drawings from each student and explanations of each drawing through out the design process were collected as the main data source. The data were analyzed by statistically (correlation coefficient) and qualitatively to find the relationship between; 1) the intuitive thinking and visual representation and 2) analytical thinking ability and communication skills that reflect MEA activities. In conclusion, first, intuitive thinking plays an important role in the ability of visual representation through pictures and the whole problem solving process. Second, the analytical thinking and elaboration process which are reflected through reflection on the arrangement of the drawings have a great influence on the communication skills. Therefore, this study investigated that MEA activities are useful activities to stimulate both intuitive and analytical thinking in elementary science gifted students, and to develop communication ability, by organizing their own ideas and providing learning opportunities for various solutions.

• Environmental Mutagens and Carcinogens
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• v.22 no.4
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• pp.312-318
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• 2002

Dioxin represents a group of halogenated aromatic hydrocarbons of which 2,3,7,8-tetrachlorod-ibenzo-p-dioxin (TCDD) is well known for its extremely toxic properties as well as ubiquitous presence in our environment and ecosystems. In order to better assess the carcinogenic mechanism of dioxin, we should utilize the reliable biomarkers that can precisely and correctly reflect multi-stage carcinogenesis. When MCF10A cells were exposed to TCDD (10 nM), expression of both CYP1A1 and CYP1B1 was induced in a time-related manner. The expression as well as activity of ornithine decarboxylase was transiently induced by TCDD treatment. In contrast, the induction of COX-2 that is implicated in carcinogenesis as well as inflammation, was not induced by TCDD. In another study, gap-junctional intercellular communication (GJIC) was attenuated by TCDD treatment as revealed by the dye-transfer assay. Based on these findings, TCDD has both tumor initiating and promoting potential in human breast epithelial cells in culture. Also, treatment of MCF10A cells with the carcinogen 7,12-dimethylbenz[a]anthracene plus TCDD resulted in malignant cell transformation as revealed by increased anchorage-independent growth of exposed cells. Additional studies may be necessary to assess the effects of TCDD on multi-stage carcinogenesis in vivo.

• Electronics and Telecommunications Trends
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• v.24 no.2
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• pp.84-96
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• 2009

유럽연합은 1990년대에 접어들면서 미국과의 경제 격차가 점차 확대되자 미국을 따라잡기 위해 리스본 전략을 채택하였다. 이 전략의 목표는 유럽의 정보화를 통한 성장, 고용, 사회적 참여로 요약할 수 있다. 리스본 전략에서 제시된 정보화 모토는 정책과 연구개발을 2개의 기둥으로 하고, 이 두 영역간의 긴밀한 상호협조를 통해 유럽정보화의 시너지를 창출하자는 것이었다. 정책 부문은 리스본 전략에서 출발하여 신 리스본 전략, i2010 전략으로 발전되어 왔으며, 이에 맞추어 연구개발 부문은 FP5, FP6으로 발전되어 오다가 현재는 FP7이 시행되고 있다. 본 고에서는 FP7의 ICT 연구프로그램에서 제안하는 도전과제와 미래기술전략을 소개하는 한편, 그 정책적 시사점을 도출하였다. FP7 ICT 연구프로그램은 유럽이 차세대 ICT 및 그 사용에 있어서 세계 선도 그룹에 들기 위해 극복해야 할 7가지 도전과제를 제안하고 있다. 이들 도전 과제들은 크게 업계의 기술 목표 및 사회경제적 목표 달성을 위한 과제로 이분할 수 있으며, 향후 10년 간의 목표와 성과물을 제시하고 있다. FP7 ICT 연구프로그램 중 '미래 및 새로 부상하고 있는 기술(FET)' 프로젝트는 예상하지 못했던 아이디어와 발전에 효과적으로 대응하기 위하여 '개방형 FET프로젝트'와 '전 방위적 FET 프로젝트'의 두 가지 상호보완적 플랜을 운영하고 있다. 본 고에서는 이들 프로젝트에 대하여 성과목표, 기대효과, 자금지원 및 예산분배계획을 간략하게 소개하였다. 결론부에서는 앞에서의 논의를 토대로 우리나라의 미래 ICT 기술개발 전략 구상시 참조해야 할 정책적 시사점을 제시하였다.

• Journal of Korean Academy of Nursing
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• v.18 no.2
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• pp.189-196
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• 1988

Health, a major concept in nursing, has not yet consistent or agreed upon definition. Although effective health care depends on clear communication between health care provider and client clear definition of health would enhance the promotion of quality in health care. There are no agreed definitions or criteria for overall health. An essentialstep would seem to be to determine commonly held meaning about the concept of health. Therefore, the study was aimed at identifying the Adult's perceptions of health concept. The subject's consisting of 312 adults, who were sampled through area sampling from May 10 to May 30,1988. The instruments used for this study were Health Conception Scale, which was developed by Smith, Laffrey's revised and tested its reliability. The data was Analyzed by S.P.S.S. program and the results were as follows ; 1. The results of the reliability test for content of health concept was $\alpha$＝.87. 2. The respondents perception of Health Meaning were inclined to emphasize the functional / role performance dimension rather than clinical dimension. 3. The perceptual level of health concept was proved to be significantly different by the variable : age, sex, religion, area marital status. In conclusion, adult's perception of Health Concept is revealed that functional and role performance dimension is more important than other dimensions. Futher study is necessary to clarify the structure of functional, adaptive, eudaimonistic dimension and systematic study with subculture will be and repetitive verification and modification of this tool is demanded.

• Journal of Korean Elementary Science Education
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• v.39 no.2
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• pp.228-242
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• 2020

The purpose of this study is to develop a student-led instructional strategy that is central to the teaching-learning process and to investigate its effects. For this study, we analyzed the learner-centered learning types (discovery learning, problem-based learning, inquiry learning) and extracted elements applicable to newly developed teaching-learning. Based on this, a student-led class strategy was established using pre-learning, teacher collaboration, small group composition, and limited open data and product presentation, and then science classes were conducted. As a result of the post-tests of the five science core competencies of the experimental group using the student-led instructional strategy and the comparative group conducting lecture-based classes, the experimental group showed higher scores than the comparative group in the scientific thinking, scientific communication, and scientific attitudes (p<.05). Based on these results, it was confirmed that the student-led class, in which the student self-adjusts the entire process of designing, exploring, and presenting learning, can help the student's scientific ability. In addition, I would like to discuss the implications of teachers' teaching-learning composition.

• Rapid Communication in Photoscience
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• v.3 no.2
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• pp.28-31
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• 2014

Loss of chlorophyll is the visible symptom of leaf senescence and staygreen refers to the delayed leaf senescence in plants. The staygreen gene (SGR) in rice (Oryza sativa L.) has been identified as its mutation maintains greenness during leaf senescence, and encodes a chloroplast protein required for the initiation of chlorophyll breakdown in plants. In this study, we isolated a rice SGR-homologous gene in creeping bentgrass (Agrostis stolonifera L.), and transgenic creeping bentgrass plants were obtained by introducing pCAMBIA3301 vector harboring antisense SGR gene under control of the senescence-specific SAG12 promoter. Transgenic plants were selected by herbicide resistance assays and genomic integration of the transgenes was confirmed by PCR analysis. Subsequent analyses demonstrated the staygreen phenotype of the transgenic creeping bentgrass plants with decreased chlorophyll loss during leaf senescence. These results suggest that the antisense SGR expression in creeping bentgrass delays leaf senescence, which provides a way to develop genetically engineered turfgrass varieties with the commercially useful staygreen trait.