• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2009년도 춘계학술대회 논문집
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• pp.171-172
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• 2009

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제11권
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• pp.171-180
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• 2001

적응하기에 너무나 빠른 속도로 정보의 물결이 굽이치는 현실에서, 초등교육 현장은 지, 덕, 체를 겸비한 조화로운 인간 교육, 즉 참된 인간 교육의 필요성이 강조되고 있다. 그러나 교육 자체의 본질과 목적에 비추어 조화로운 인간을 육성하기 위한 기초교육이 어떤 모습을 띠어야 할 것인가에 대한 문제의식에서 Pestalozzi의 기본 사상, 초등교육의 원리, 수학교육학의 체계를 고찰해 봄으로써 우리의 초등수학교육에 시사하는 바를 찾고자 한다.

• 한국융합학회논문지
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• 제10권8호
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• pp.171-179
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• 2019

본 연구는 영유아 건강을 위한 미세먼지를 예방하고 관리할 수 있기 위해 QR 코드를 이용한 E-book 기반 미세먼지 예방 교육 프로그램 모형을 개발하고자 하였다. 이에 아동건강 전문가 2명과 영유아 교육전문가 3명의 심도 깊은 토론을 통해 미세먼지 예방을 위한 유아건강교육 프로그램 모형을 개발했으며, QR 코드를 이용한 E-book을 개발하였다. QR 코드를 활용한 e-book 기반의 미세먼지 예방교육 프로그램 모형은 만 5세 유아를 대상으로 현장 적합성 및 교수매체로서의 적절성을 검증하였다. 연구결과, 첫째, QR 코드를 이용한 E-book 기반 미세먼지 예방 교육프로그램 모형은 감상활동-핵심활동-마무리활동의 3단계를 거쳐 개발되었다. 둘째, QR 코드를 이용한 E-book은 미세먼지 예방 교육 프로그램에 적용가능한 유용한 교수매체이다. 결론적으로, 개발된 QR 코드를 활용한 e-book 기반 미세먼지 예방교육 프로그램은 영유아의 미세먼지에 대한 민감성을 높이고, 영유아교육 분야의 미세먼지 예방 및 건강관리 활동을 위한 적절한 교육방법으로 활용될 것이다.

• Fisheries and Aquatic Sciences
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• 제2권2호
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• pp.167-171
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• 1999

This study was designed to develop biomarkers of coastal pollution using biochemical indices of flounder (Paralichthys olivaceus) by changes in lactate dehydrogenase (LDH) activity in the serum and cholinesterase activities in brain membranes. For this purpose acetylcholiesterase (AChE) activity, butyrylcholinesterase (BChE) activity, LDH/AChE ratio and LDH/BChE ratio of cultured flounders at 5 different sites on the southern coast of Korea were compared to those of wild flounders caught in the Pohang, eastern coast of Korea as a control group. Relatively high LDH activities were measured in the serum of flounders cultured on the southern coast of Korea (0.101-0.145 unit) than those in the Pohang control group (0.093 unit). AChE activities were significantly low $(about\;10-20\%)$ in brain membranes of cultured flounders compared to those in the Pohang control group. The ratios of LDH/AChE and LDH/BChE were consistently higher $(136-178\%,\; 155-214\%)$ in cultured flounders than those of Pohang control group. Thus, we propose that the ratios of LDH/AChE and LDH/BChE in flounders could be applicable for the diagnosis of marine pollution.

• 소성∙가공
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• 제11권2호
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• pp.171-178
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• 2002

The elastic deflections of the cold forging die influence the dimensional accuracy of forged parts. The die dimension is continuously changed during the loading, unloading, and ejecting stage. In this paper, we evaluated the elastic deflections of cold forging die during the loading, unloding and ejecting stage with experimental and FEM analysis. Uni-axial strain gages are used to measure elastic strain of die during each forging stage. Strain gages are attached un the upper surface of die. A commercial F.E.M. code, DEFORM$-2D^{TM}$ is used to predict the elastic strains of die, to be compared those by experiments. Two modelling approaches are used to define the reasonable analysis method. The first of the two modelling approaches is to regard the die as rigid body over forging cycle. And then, the die stress is analyzed by loading the die with pressure from the deformed part. The other is to regard the die as elastic body from forging cycle. The elastic strain of tool is calculated and the tool is elastically deformed at each strep. The calculated results under the elastic die assumption are well agreed wish experimental data using the strain gages.

• 한국진공학회:학술대회논문집
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• 한국진공학회 1999년도 제17회 학술발표회 논문개요집
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• pp.171-171
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• 1999

We studied the charge redistribution in the Pt-M (M=Cu, Co) alloys by X-ray Absorption Near Edge Spectroscopy(XANES) and X-ray Photoelectron Spectroscopy(XPS). These analysis tools provide us information about the charge transfer in the valence band of intermetallic bonding. The samples were prepared by arc-melting method. After annealing this samples in vacuum for several hours, we cold get the ordered samples, which were confirmed with XRD analysis. the core and valence level energy shift in these system were investigated by Mg $K\alpha$(1253.6eV) x-ray source for Pt-Co alloys and monochromatized Al $K\alpha$ (1486.6eV) for Pt-Cu alloys. Pt L2, L3-edge, and Cu, Co K-edge XANES spectra were measured with the total electron-yield mode detector at the 3Cl beam line of the PLS (Pohang light source0. from the changes of White line (WL) area and the core level shifts of the each metal sites, we can obtain the information about the electrons participating in the intermetallic bonding of the Pt-Cu and Pt-Co alloys.

• 한국항공운항학회지
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• 제28권4호
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• pp.171-175
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• 2020

The present and future cities are expanding, and the noise and environmental pollution in cities are getting worse day by day, causing saturation of road and subway traffic. As a result, citizens are spending a great deal of time and money. The use of the sky as a measure to solve this problem has become a reality. However, airplanes that require airstrips and noisy helicopters are difficult to use in cities. As a solution, PAVs and UAMs that generate low noise and enable vertical takeoff and landing using electric energy, motor, hybrid, and hydrogen energy, are attracting attention, with its practicality being promoted in many countries. The development of urban environment and technology has led to the emergence of Personal Air Vehicle (PAV), Vertical Takeoff and Landing (eVTOL), and Urban Air Mobility (UAM) for shipping. Though currently at the level of testing, general commercialization of these air transport means is expected in the next five to fifteen years. This study suggests a plan on the application of human factors to the introduction of PAV and UAM.

• 한국정보시스템학회:학술대회논문집
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• 한국정보시스템학회 2005년도 추계학술대회 발표 논문집
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• pp.171-184
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• 2005

The e-business strategies ultimately Pursue creating the maximal value for customers through the competitive advantages and business opportunities newly created on the basis of information technologies. For the realization of e-business strategies, the successful implementation and operation of e-business system must be the crucial activities in and out of an organization. Therefore, in physical world, there were lots of interests that what kind of key factors can lead the success of e-business system. Moreover, in the field of academia also, there have been many research results for investigating and finding out the key success factors for e-business system. However, the perceptual level of the significance of key success factors that organization members perceive can be changed over each phase of system life cycle such phases as introduction, growth, maturity, and decline. This study investigated that there might be significant differences in the perceptual level regarding importance of success factors among phases of system life cycle.

• Mass Spectrometry Letters
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• 제12권4호
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• pp.163-171
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• 2021

Emiliania huxleyi is a marine phytoplankton that plays a critical role in global carbon and sulfur cycling. The genome of E. huxleyi has been sequenced, and an in-depth proteomic profile of this organism has been reported. This study analyzed the phosphoproteome of E. huxleyi and identified its changes under calcium-limited conditions. A TiO₂ microcolumn was used for phosphopeptide enrichment, followed by liquid chromatography-tandem mass spectrometry analysis. Overall, we identified 7,010 phosphorylated sites on 3,355 phosphopeptides associated with 2,929 phosphoproteins in E. huxleyi. Quantitative analysis revealed changes in the phosphoproteome in E. huxleyi when ambient conditions changed to calcium-limited conditions, notably the phosphorylation of some transporters was altered. This study provides an overview of protein phosphorylation in E. huxleyi and paves the way for further investigations of its biological functions.

• 한국콘텐츠학회논문지
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• 제13권8호
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• pp.171-179
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• 2013

19대 총선에서 특정 후보의 이름을 포함하도록 정한 통합식별아이디 이포지션(ePosition)을 기반으로 후보 개인 맞춤형 LBSNS 앱을 기획하여 개발하고 선거기간 동안 홍보 목적으로 활용하였다. 선거를 전후하여 본 LBSNS 앱이 후보의 지지율 변화에 어느 정도 기여했는지 정량적으로 그 영향을 분석하였다. 대전광역시 6개 지역구 24명의 후보를 대상으로 개인 맞춤형 LBSNS 앱을 활용한 후보와 그렇지 않은 후보를 구분하여 선거운동 기간 동안 언론에 공개적으로 발표된 지지율과 개표 결과를 바탕으로 개인별 지지율 변화를 비교하였다. 해당 앱을 활용한 3명의 후보는 각각 12.6%, 11.4% 및 11.2%씩 두 자리 수의 지지율 상승이 있었지만 나머지 21명의 후보들은 지지율 변화는 모두 3% 이내로 머물러 개인맞춤형 스마트폰 앱을 활용함으로써 후보 지지율 상승에 상당한 효과가 있었다.