• 공학교육연구
• /
• 제15권5호
• /
• pp.69-77
• /
• 2012

GNTECH-ICEE, which this study seeks to investigate and evaluate, demonstrates a new system of training innovative engineers. An essential component of this operation is a Small Engineering Group (SEG) that links professors, students and industrial experts together, to study and apply different techniques in determining the processes and products that relate industrial sectors needs. As an education program, SEG also provides a right direction for educating students, and generates industry-university link based human resources. Through these efforts, GNTECH-ICEE has effectively trained creative, professional, and practical engineers, by operating a variety of programs for meeting industrial needs and enhancing engineering education. SEG has many merits that have influenced its success so far, but the program also faces some challenges. The merits include; strong group bondage, practical ability incubation, and efficient administrative support. In terms of demerits, it is evident that sufficient theoretical education and local small-middle size enterprises (SMEs)' sustainable participation cannot be warranted. Thus, we propose that initiative strategies have been helpful to maximize GNTECH-ICEE's goal of making students into multi-player engineer, but continuously financial and administrative strategies be put into place in order to guarantee SMEs' long-term devotion to the program, and to help create a sustainable network between students and the companies involved.

• 공학교육연구
• /
• 제16권5호
• /
• pp.36-42
• /
• 2013

This paper explores the concept and historic context of appropriate technology to provide the academic community with better understanding, insights, current trends, and finally, implications for engineering education. To do that, a rigorous literature survey has been carried out. The result supports that the appropriate technology concept will meet present tasks of engineering education, which calls on policy development and further studies.

• 공학교육연구
• /
• 제17권4호
• /
• pp.25-32
• /
• 2014

Following the collaborator meetings report towards practical engineering education at universities(June 2010), the Pioneering University Reform Project supported by The Ministry of Education, Culture, Sports, Science and Technology(MEXT) of Japan solicited opinions from industry, professional associations, and academia on the goals of the individual fields, as well as common goals, that could be adaptable and applicable for a broad range of universities and curricula. This paper gives an overview of two surveys that were conducted, as well as a summary of the mechanical engineering goals as an example of the individual fields.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2016년도 추계학술발표대회
• /
• pp.542-545
• /
• 2016

컴퓨터공학 분야의 논문 정보를 다루고 있는 대표적인 사이트인 DBLP의 연구 동향을 알아보기 위해 본 논문에서는 약 300만개 이상의 논문 서지정보 가져와 분석했다. IT용어 사전을 만들고 각 논문의 제목과 초록에 포함된 주제어를 추출해 분석을 위한 고차원의 행렬을 만들고, k-평균 군집화 기법을 활용하여 1960년도부터 2010년도까지 총 60여 년간의 연대별 주제어 출현 패턴을 분석함으로써 흥미로운 결과를 도출해 냈다.

• Current Optics and Photonics
• /
• 제5권2호
• /
• pp.147-154
• /
• 2021

Microfluidic chip technology is a research focus in biology, chemistry, and medicine, for example. However, microfluidic chips are rarely applied in imaging, especially in ghost imaging. Thus in this work we propose a ghost-imaging system, in which we deploy a novel microfluidic chip modulator (MCM) constructed of double-layer zigzag micro pipelines. While in traditional situations a spatial light modulator (SLM) and supporting computers are required, we can get rid of active modulation devices and computers with this proposed scheme. The corresponding simulation analysis verifies good feasibility of the scheme, which can ensure the quality of data transmission and achieve convenient, fast ghost imaging passively.

• 과학교육연구지
• /
• 제45권3호
• /
• pp.364-378
• /
• 2021

본 연구는 융합 인재 교육 경험을 오랫동안 해 온 교사들의 공학적 설계에 대한 인식을 탐색한 것이다. 본 연구에 참여한 교사들은 융합 인재 교육 경험을 5년 이상 해 온 초·중등 교사 12명으로 진행하였으며, 반구조화된 인터뷰를 통해서 진행되었으며, 면담은 1~2회에 걸쳐 60~90분 정도로 진행되었다. 면담 질문은 융합 인재 교육 경험과 공학적 설계에 대한 인식, 공학적 설계의 교육과정 반영 여부, 공학적 설계를 도입한 융합 인재 교육의 실제사례 등을 중심으로 진행하였다. 본 연구의 결과로는 과학, 기술, 공학에 대한 개념의 동일시 그리고 혼재, 공학적 설계는 창의적 설계를 위해 필요한 요소들의 적절한 조합, 공학적 설계는 창의적 설계에 유용성과 경제성을 추구했을 때 가능, 공학적 설계는 이공계 진로를 선택한 학생들만을 위한 것으로 인식하고 있었다. 본 연구를 토대로 과학, 기술, 공학에 대한 올바른 개념을 정립하여 제시하고 과학적 문제 해결을 위한 공학적 설계에 대한 내용을 교육과정에 포함시키는 노력이 필요하다. 또한, 공학적 설계가 포함된 융합 인재 교육 프로그램을 개발하고 확산하여 현장에 적용해야 할 것이다. 이를 통해 교사와 예비 교사들의 과학, 공학 융합 프로그램과 공학적 설계에 대한 인식을 개선시킬 수 있는 구체적인 실행 방안을 모색해야 할 것이다.

• Journal of Microbiology and Biotechnology
• /
• 제32권1호
• /
• pp.99-109
• /
• 2022

This study is the first report on production and characterization of the enzyme from an Ornithinibacillus species. A 4.2-fold increase in the extracellular protease (called L9^T) production from Ornithinibacillus caprae L9^T was achieved through the one-factor-at-a-time approach and response surface methodological optimization. L9^T protease exhibited a unique protein band with a mass of 25.9 kDa upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis. This novel protease was active over a range of pH (4-13), temperatures (30-80℃) and salt concentrations (0-220 g/l), with the maximal activity observed at pH 7, 70℃ and 20 g/l NaCl. Proteolytic activity was upgraded in the presence of Ag⁺, Ca²⁺ and Sr²⁺, but was totally suppressed by 5 mM phenylmethylsulfonyl fluoride, which suggests that this enzyme belongs to the serine protease family. L9^T protease was resistant to certain common organic solvents and surfactants; particularly, 5 mM Tween 20 and Tween 80 improved the activity by 63 and 15%, respectively. More importantly, L9^T protease was found to be effective in dehairing of goatskins, cowhides and rabbit-skins without damaging the collagen fibers. These properties confirm the feasibility of L9^T protease in industrial applications, especially in leather processing.

• 한국지구과학회지
• /
• 제36권5호
• /
• pp.484-499
• /
• 2015

This study explores the impact of a STEM integration teacher professional development program focusing on teachers' perception of engineering and their attitudes toward integrating engineering into teaching. A total of sixty-eight teachers from ten schools participated in the program for five days. Data are collected from three main sources including (1) pre and post concept maps probing teachers' perceptions about the engineering discipline, (2) a pre and post survey measuring teachers' self-efficacy of teaching science/mathematics within the engineering context, and (3) engineering integrated science and (or) mathematics lesson plans and teaching reflections. This study utilizes both qualitative and quantitative research methods depending on the data we have collected. The results show that both science and math teachers thought that integrating engineering into teaching provided valuable outcomes, i.e., promoting students' learning about engineering and improving their interest in science or math through real-world problem solving exercises. Participants also felt more comfortable about integrating engineering in their teaching after the program. The results also imply that the teachers' understandings of engineering become more concrete after the program. This study also provides an overview of the challenges and advantages of teaching engineering in K-12 science and mathematics classrooms.

• Journal of Animal Science and Technology
• /
• 제63권4호
• /
• pp.934-953
• /
• 2021

Ciglitazone is a member of the thiazolidinedione family, and specifically binds to peroxisome proliferator-activated receptor-γ (PPARγ), thereby promoting adipocyte differentiation. We hypothesized that ciglitazone as a PPARγ ligand in the absence of an adipocyte differentiation cocktail would increase adiponectin and adipogenic gene expression in bovine satellite cells (BSC). Muscle-derived BSCs were isolated from six, 18-month-old Yanbian Yellow Cattle. The BSC were cultured for 96 h in differentiation medium containing 5 µM ciglitazone (CL), 10 µM ciglitazone (CM), or 20 µM ciglitazone (CH). Control (CON) BSC were cultured only in a differentiation medium (containing 2% horse serum). The presence of myogenin, desmin, and paired box 7 (Pax7) proteins was confirmed in the BSC by immunofluorescence staining. The CL, CM, and CH treatments produced higher concentrations of triacylglycerol and lipid droplet accumulation in myotubes than those of the CON treatment. Ciglitazone treatments significantly increased the relative expression of PPARγ, CCAAT/enhancer-binding protein alpha (C/EBPα), C/EBPβ, fatty acid synthase, stearoyl-CoA desaturase, and perilipin 2. Ciglitazone treatments increased gene expression of Pax3 and Pax7 and decreased expression of myogenic differentiation-1, myogenin, myogenic regulatory factor-5, and myogenin-4 (p < 0.01). Adiponectin concentration caused by ciglitazone treatments was significantly greater than CON (p < 0.01). RNA sequencing showed that 281 differentially expressed genes (DEGs) were found in the treatments of ciglitazone. DEGs gene ontology (GO) analysis showed that the top 10 GO enrichment significantly changed the biological processes such as protein trimerization, negative regulation of cell proliferation, adipocytes differentiation, and cellular response to external stimulus. Kyoto Encyclopedia of Genes and Genomes pathway analysis showed that DEGs were involved in the p53 signaling pathway, PPAR signaling pathway, biosynthesis of amino acids, tumor necrosis factor signaling pathway, non-alcoholic fatty liver disease, PI3K-Akt signaling pathway, and Wnt signaling pathway. These results indicate that ciglitazone acts as PPARγ agonist, effectively increases the adiponectin concentration and adipogenic gene expression, and stimulates the conversion of BSC to adipocyte-like cells in the absence of adipocyte differentiation cocktail.

• 한국고분자학회:학술대회논문집
• /
• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
• /
• pp.334-334
• /
• 2006

Helical polymers like polyisocyanates with single screw sense are essential to exhibit sophisticated functions like molecular recognition, self-replication, chirality memory and catalytic activity. One approach that has not been explored is the effect on handedness of the polyisocyanates through end-capping with a chiral residue. Induction of chirality in poly(n-hexyl isocyanate) was studied by end-capping with chiral (R and S) 2-bromo-3-methylbutyryl chloride(R-BMBC and S-BMBC). We have shown that a control over living anionic polymerization of HIC by using a suitable initiator affords an opportunity to introduce chiral end-groups with 100% yield and in high purity. This has resulted in helicity induction through extended lengths several orders of magnitude.