• Geomechanics and Engineering
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• 제23권2호
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• pp.151-163
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• 2020

Grouting method is an effective way of reinforcing cracked rock masses and plugging water gushing. Current grouting diffusion models are generally developed for horizontal cracks, which is contradictory to the fact that the crack generally occurs in rock masses with irregular spatial distribution characteristics in real underground environments. To solve this problem, this study selected a cement-sodium silicate slurry (C-S slurry) generally used in engineering as a fast-curing grouting material and regarded the C-S slurry as a Bingham fluid with time-varying viscosity for analysis. Based on the theory of fluid mechanics, and by simultaneously considering the deadweight of slurry and characteristics of non-uniform spatial distribution of viscosity of fast-curing grouts, a theoretical model of slurry diffusion in an oblique crack in rock masses at constant grouting rate was established. Moreover, the viscosity and pressure distribution equations in the slurry diffusion zone were deduced, thus quantifying the relationship between grouting pressure, grouting time, and slurry diffusion distance. On this basis, by using a 3-d finite element program in multi-field coupled software Comsol, the numerical simulation results were compared with theoretical calculation values, further verifying the effectiveness of the theoretical model. In addition, through the analysis of two engineering case studies, the theoretical calculations and measured slurry diffusion radius were compared, to evaluate the application effects of the model in engineering practice. Finally, by using the established theoretical model, the influence of cracking in rock masses on the diffusion characteristics of slurry was analysed. The results demonstrate that the inclination angle of the crack in rock masses and azimuth angle of slurry diffusion affect slurry diffusion characteristics. More attention should be paid to the actual grouting process. The results can provide references for determining grouting parameters of fast-curing grouts in engineering practice.

• 한국초등과학교육학회지:초등과학교육
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• 제40권4호
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• pp.520-544
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• 2021

이 연구는 초등학생의 창의 과정과 산물의 관계를 탐색하기 위한 과학 창의성 검사 도구를 개발하는데 목적을 두고 있다. 이를 위해 연구자는 과학 창의성 관련 논문을 분석한 후, 창의 과정과 산물의 구성요인에 근거하여 문항을 개발하였다. 그리고 과학 교육 전문가 9명의 검토를 마친 검사 도구를 파일럿 테스트하였다. '동물', '식물'의 두 세트로 이루어진 검사 도구는 수정과 보완을 거쳐 최종적으로 5학년 학생 105명에게 투입되었다. 투입 결과는 WinSteps, SPSS와 AMOS 통계프로그램으로 분석되었다. 이 연구의 주요 결과는 첫째, 과학 영역에서 창의 과정은 과학 지식, 탐구기능, 창의적 사고기능(확산적, 수렴적, 연관적 사고)을 포함한다. 창의 산물은 새로우면서 과학적으로 유용한 아이디어가 어떤 형태로 나타난 것이다. 둘째, 이 연구에서 대표 탐구기능으로 선정된 관찰은 구성 타당도 측면에서 창의적 사고기능과 연관성이 없어야 했다. 셋째, 유용성 항목은 다른 항목 중 가장 낮은 평균치를 기록하였는데, 평가자인 교사의 관점에서 과학적 타당성과 유용성을 만족시키기 어렵기 때문으로 사료된다. 넷째, 동형검사 신뢰도를 알아보기 위한 '동물'과 '식물' 문항 간 스피어만 상관 계수는 독창성 항목을 제외하고 유의하게 나타났다. 다섯째, 검사 도구는 집중타당성, 판별타당성, 법칙타당성 세 가지 측면에서 구성 타당도를 대체로 만족시켰다. 연구 결과를 바탕으로 창의 과정과 산물의 관계를 탐색하고 학교 현장에서 실제적인 평가 도구로 역할을 할 검사 도구의 유용성을 논하였다.

• 한국콘텐츠학회논문지
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• 제22권1호
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• pp.250-260
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• 2022

본 연구의 목적은 정부 보조금과 과학 기술 혁신 투입이 중국 문화산업 기업의 경영 실적에 미치는 영향을 검증하여 문화산업 기업의 경영 실적은 높일 수 있는 대안을 제시하는 데 있다. 본 연구는 이를 위해 2015년~2020년 중국 238개 문화산업 상장기업을 대상으로 1,175개 표본을 추출하여 Stata 16 소프트웨어로 실증 분석한다. 분석 결과는 다음과 같다. 첫째, 정부 보조금은 중국 문화산업 기업의 경영 실적에 정(+)의 영향을 미쳤다. 둘째, 정부 보조금은 중국 문화산업 기업의 과학 기술 혁신 투입에 정(+)의 영향을 미쳤다. 셋째, 과학 기술 혁신 투입은 중국 문화산업 기업의 경영 실적에 정(+)의 영향을 미쳤다. 넷째, 과학 기술 혁신 투입은 정부 보조금과 중국 문화산업 기업의 경영 실적의 관계에서 매개효과가 있다는 것을 검증하였다. 과학 기술 혁신 투입은 부분 매개효과를 가지고 있다. 연구 결과를 토대로 문화산업 기업의 경영 실적 향상을 위한 대책은 다음과 같다. 첫째, 현대화된 문화산업 시장 시스템을 갖추는 것이다. 둘째, 정부는 문화산업 기업에 대한 금융,세무 지원을 확대한다.셋째, 문화산업과 과학 기술 혁신의 융합을 촉진한다.

• Asian Pacific Journal of Cancer Prevention
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• 제17권4호
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• pp.2337-2339
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• 2016

Electronic presentations have become useful tools for surgeons, other clinicians and patients, facilitating medical and legal support and scientific research. Microsoft(R) PowerPoint is by far and away the most commonly used computer-based presentation package. Setting up surgical clinical cases with PowerPoint makes it easy to register and follow patients for the purpose of discussion of treatment plan or scientific presentations. It facilitates communication between professionals, supervising clinical cases and teaching. It is ofter useful to create a template to standardize the presentation, offered by the software through the slide master. The purpose of this paper was to show a simple and practical method for creating a Microsoft(R) PowerPoint template for use in presentations comcerning oral and maxillofacial cancer.

• 대한지구과학교육학회지
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• 제6권1호
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• pp.50-59
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• 2013

Prezi, which is an implemented software in the form of flash-based online presentation, is considered to be a new appropriate smart-learning tool. This study aimed to investigate an impact of project learning utilizing Prezi on the creativity, attitudes toward science and science process skills of scientific gifted children in elementary school. The results of this study were as follows; First, after project learning utilizing Prezi, their creativity was raised meaningfully, especially in sub-elements of patience, adaptability and variety of interestings. Second, project learning utilizing Prezi showed meaningful effect on their improvement of science process skill, especially in integrated science process skills. Third, project learning utilizing Prezi improved their attitudes toward science meaningfully. In almost sub-elements, except the element of ordinariness of scientist, positive meaningful improvements were showed.

• International Journal of Computer Science & Network Security
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• 제21권7호
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• pp.249-256
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• 2021

An issue of security and threat is urgent as well as it concerns everyone: a person, community, state, etc. Today, the question of cybersecurity has become especially relevant due to general digitalization and the spread of the cyberculture. In terms of it, the growing popularity of videogames can be observed. Their impact on society differs significantly, therefore, it needs thorough consideration. The purpose of the article is to disclose the role of videogames in cybersecurity. To achieve the stated purpose, such methods as analysis, synthesis, systematization and practical involvement of videogames have been used. As a result, three levels of possible threat of videogames has been distinguished: videogames as a possibly dangerous software, as a tool of propaganda and spread of stereotypes, as a space for the creation of virtual communities. In conclusion, it is stated that videogames can be not only a threat, but also a tool for strengthening the cybersecurity.

• 유통과학연구
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• 제21권6호
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• pp.119-129
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• 2023

Purpose: The study is developed in order to describe the trends of scientific production of blockchain technologies for sustainability within the supply chains. Research design, data and methodology: This study is developed from the documentary field from the application of bibliometric techniques to analyze the trends of scientific production indexed in the Scopus database, for which processing is carried out in the R and VOS Viewer software. Results: The results show a total of 461 documents, of which 58% of the articles, 17% are conference articles and the remaining 25% are made up of other formats. Conclusions: 78% of the articles are concentrated in the years 2020, 2021 and 2022. India, United Kingdom, China, United States and Italy are the countries where 70% of all the publications were published. 23% of the articles have been published in four journals: Sustainability (Switzerland), Journal of Cleaner Production, Computers and Industrial Engineering and Business Strategy and the Environment. Sarkis, J. is the author with the most published articles with fifteen publications and, finally, 13% of the total publications were concentrated in: Uttaranchal University, Yasar University, Malaviya National Institute of Technology, Centro Di Ricerca Ingegneria e Trasformazioni Agroalimentari and University of Hong Kong.

• 한국과학교육학회지
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• 제29권3호
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• pp.348-358
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• 2009

The purpose of this study was to investigate brain activation pattern and functional connectivity network during experimental design on the biological phenomena. Twenty six right-handed healthy science teachers volunteered to be in the present study. To investigate participants' brain activities during the tasks, 3.0T fMRI system with the block experimental-design was used to measure BOLD signals of their brain and SPM2 software package was applied to analyze the acquired initial image data from the fMRI system. According to the analyzed data, superior, middle and inferior frontal gyrus, superior and inferior parietal lobule, fusiform gyrus, lingual gyrus, and bilateral cerebellum were significantly activated during participants' carrying-out experimental design. The network model was consisting of six nodes (ROIs) and its six connections. These results suggested the notion that the activation and connections of these regions mean that experimental design process couldn't succeed just a memory retrieval process. These results enable the scientific experimental design process to be examined from the cognitive neuroscience perspective, and may be used as a basis for developing a teaching-learning program for scientific experimental design such as brain-based science education curriculum.

• 한국항공우주학회지
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• 제46권4호
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• pp.345-358
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• 2018

고고도 과학기구는 다양한 과학연구목표를 수행하기 위해 미국, 프랑스, 일본과 같은 항공우주선진국에서 수십 년간 사용되어 왔다. 고고도 과학기구는 초기 개발 및 운용비용이 막대하게 소요되므로 국가연구기관 중심으로 연구개발이 진행되어 왔지만 최근에는 저비용 고성능 오픈소스 소프트/하드웨어 생태계의 출현으로 과학기구 개발 진입장벽이 낮아졌다. 본 연구에서는 상용 기성품을 활용하여 저비용, 사용 용이성, 호환성, 제품 개발신속성을 고려한 소형 영압력기구(Zero Pressure Balloon) 시제품을 제작하였다. 또한, 8회에 걸친 비행시험을 통하여 비행운용기술을 축적하였으며 기구시스템의 작동신뢰성을 검증하여 향후 대형 영압력기구 운용을 위한 기반을 구축하였다.

• Archives of Plastic Surgery
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• 제40권2호
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• pp.109-115
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• 2013

Background Breast reconstruction refers to the rebuilding of a woman's breast using autologous tissue or prosthetic material to form a natural-looking breast. It is increasingly offered to women undergoing mastectomy for breast cancer. However, there is no systematic analysis available for the expanding area of research on breast reconstruction. Methods A bibliometric method was used to obtain a view of the scientific production about breast reconstruction by data extracted from the Institute for Scientific Information (ISI). Specific parameters were retrieved from the ISI. Articles about breast reconstruction were analyzed to obtain a view of the topic's structure, history, and document relationships using HistCite software. Trends in the most influential publications and authors were analyzed. Results The number of articles was constantly increasing. Most highly cited articles described the methods of flap construction in the surgery. Other highly cited articles discussed the psychological or emotional aspects of breast reconstruction, skin sparing mastectomy, and breast reconstruction in the irradiated breast. Conclusions This was the first breast reconstruction scientometric analysis, representing the characteristics of papers and the trends of scientific production. A constant increase in the number of breast reconstruction papers and also the increasing number of citations shows that there is an increasing interest in this area of medical science. It seems that most of the research in this field is focused on the technical aspects of surgery.