• 한국지구과학회지
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• 제42권4호
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• pp.470-475
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• 2021

This study aimed to explore alignments among three curricula based on the contents of the university level curriculum. The 2015 revised curriculum, International Baccalaureate(IB), and Next Generation Science Standards(NGSS) were selected for this study, and a college textbook was analyzed to compare the curricula. As the age groups studying the curricular were different, we reorganized them according to school ages prior to conducting the study. The results of the analysis were: first, the contents of the 2015 revised curriculum did not sufficiently elaborate on the natural hazards related to humans, unlike the university level, IB PYP, and NGSS curricula. Third, there are different ways of introducing scientific vocabulary curricula, meaning that the number of scientific vocabularies in the 2015 revised curriculum was less than that in the IB, PYP, and NGSS.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2008년도 추계학술대회 및 정기총회
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• pp.455-459
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• 2008

This study defines the Next Generation System(NGS) built by domestic financial businesses and classifies their architecture into two typical types according to the duration of the project and the relative cost of IT investment in the short term: the Big Bang approach and the Phase approach. Herein, we study the two approaches as alternatives in developing the Next Generation System, and derive the factors that are to be considered in the evaluation of the two alternatives for financial businesses. The set of standards for the choice between the two models are grouped into categories that constitute performance evaluation for IT - Cost, Performance and Risk. We drill down further into each category to second and third subordinate levels to derive detailed selection criteria. Based on the criteria drawn from the study, we conduct a survey with information system planners, IT managers and specialists at financial companies who are currently planning, developing or have completed a Next Generation System. Survey results are analyzed using the AHP methodology to compare and understand the different approach in the implementation of NGS for financial business.

• 한국자기공명학회논문지
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• 제23권2호
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• pp.46-50
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• 2019

Spin orbit torque would be applied as the next generation of MRAM, so many researchers are interested in related field. To make a more efficient device, electric current should convert into spin current with high efficiency. Moreover, it becomes important to measure efficiency of spin orbit torque accurately. We measured spin torque FMR of W/CoFeB hetero structure system with direct current. The efficiencies of the damping like torque and field like torque were measured by using the linewidth and on-resonance field proportional to direct current. In addition, we analyzed that a quadratic shift of the on-response field was caused by the Joule heating.

• JSTS:Journal of Semiconductor Technology and Science
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• 제9권4호
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• pp.249-256
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• 2009

As a wireless handset deals with multiple application standards concurrently, RF transmitters and power amplifiers are required to be more power efficient and reconfigurable. In this paper, we review the recent advances in the design of the power amplifiers and transmitters. Then, the systematic design approaches to improve the performance with the digital baseband signal processing are introduced for the next generation mobile handset.

• 한국과학교육학회지
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• 제35권2호
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• pp.277-288
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• 2015

과학 교육과정의 성취기준은 교육목표를 안내하고, 교육의 내용을 구성하며, 평가의 방향을 지시하는 중요한 기능을 한다. 2009 개정 과학과 교육과정은 자연현상과 사물에 대하여 흥미와 호기심을 가지고 탐구하여 과학의 기본 개념을 이해하고, 과학적 사고력과 창의적 문제해결력을 길러 일상생활의 문제를 해결할 줄 아는 과학적 소양을 기르는데 목표를 두고 있다. 새롭게 개정된 교육과정인 만큼 이전의 교육과정과 비교하여 과학교육이 추구하는 목표를 지향하는 성취기준이 되어야 바람직 할 것이다. Bloom의 신교육목표분류체계를 사용하여 우리 교육과정의 성취기준을 지식 차원과 인지과정 차원으로 분석함으로써 다양한 지식차원과 인지과정 차원을 담아내고 있는지 알아보았다. 2009 개정 교육과정은 이전의 2007 개정 교육과정과 비교하여 인지과정 및 지식 차원에서 고등사고를 촉진하는 인지과정 및 지식차원의 유형이 확장되었음을 확인하였다. 그러나 미국의 NGSS와 비교하여 인지과정 차원과 지식 차원에서 특정 범주의 인지과정이나 지식 유형에 편중되어 있었다. '분석하다', '평가하다', '창안하다'와 같은 인지과정이나 '메타인지 지식'과 같은 지식의 유형은 소홀히 다루어지고 있었다. 성취기준에서 소홀히 다루어진 인지과정과 지식의 유형은 교사용 지도서의 학습목표에서도 다루어지지 않음을 비교분석을 통해 확인하였다. 교육과정에서 천명하고 있는 과학교육의 목표를 고려하였을 때 교육과정의 성취기준 및 교사용 지도서의 학습목표 진술이 일부 지식 차원과 인지과정 차원에 편중되어 있는 것은 분명 개선이 필요하다고 할 수 있다. 따라서 과학과 교육과정 성취기준의 진술방식에 대한 제고를 통하여 다양한 인지과정과 지식의 유형을 지향하는 성취기준을 작성하여야 할 것이다.

• Journal of Astronomy and Space Sciences
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• 제41권3호
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• pp.195-208
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• 2024

As human exploration goals shift from missions in low Earth orbit (LEO) to long-duration interplanetary missions, radiation protection remains one of the key technological issues that must be resolved. The low Earth orbit space radiation dosimeter (LEO-DOS) instrument to measure radiation levels and create a global dose map in the LEO on board the the next generation small satellite-2 (NEXTSat-2) was launched successfully on May 25, 2023 using the Nuri KSLV-III in Korea. The NEXTSat-2 orbits the Earth every 100 minutes, in an orbit with an inclination of 97.8° and an altitude of about 550 km above sea level. The LEO-DOS is equipped with a particle dosimeter (PD) and a neutron spectrometer (NS), which enable the measurement of dosimetric quantities such as absorbed dose (D), dose equivalent (H) for charged particles and neutrons. To verify the observations of LEO-DOS, we conducted a radiation dose estimation study based on the initial results of LEO-DOS, measured from June 2023 to September 2023. The study considered four source categories: (i) galactic cosmic ray particles; (ii) the South Atlantic Anomaly region of the inner radiation belt (IRB); (iii) relativistic electrons and/or bremsstrahlung in the outer radiation belt (ORB); and (iv) solar energetic particle (SEP) events.

• 공학교육연구
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• 제21권3호
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• pp.3-11
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• 2018

The Conceiving-Designing-Implementing-Operating (CDIO) initiative is a worldwide organization with members from over 120 institutions for higher education, and it provides an innovative educational framework for producing the next generation of engineers. This paper compares the CDIO standards and syllabus to the accreditation criteria of Accreditation Board for Engineering Education of Korea, ABEEK to identify similarities and differences and to find points of improvement for ABEEK criteria. It is found that the basic concepts of ABEEK criteria correlates well with those of CDIO standards, while the CDIO standards and syllabus provide more detailed and well-defined guidelines for engineering programs. Finally, some discussions are presented on the differences between the two educational models, a voluntary-based CDIO model and an accreditation-based ABEEK model.

• 한국진공학회지
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• 제18권6호
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• pp.411-417
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• 2009

차세대 반도체 및 디스플레이 산업용 드라이펌프의 배기속도를 평가하기 위해 최소부피 22 L 급의 정적형 유량계를 설계/제작 하였다. 정적형 유량계의 기본 평가항목인 base pressure와 leak rate 측정결과 각각 $6{\times}10^{-8}\;mbar$ 와 $1.5{\times}10^{-6}\;mbar-L/s$로 측정되었고 throughput limit의 경우 기존 875 L 급보다 1 order 낮은 $1{\times}10^{-3}\;mbar-L/s$ 영역까지 확대되었음이 확인되었다. 구축된 시스템을 이용해 배기용량이 적은 최신 공정 드라이 펌프까지도 배기속도 값을 정확히 측정할 수 있으며, 구축비용이 높은 정압형 유량계를 어느 정도 대체할 수 있을 것으로 기대하고 있다.

• ETRI Journal
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• 제40권3호
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• pp.355-365
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• 2018

The increase in data traffic calls for investment in mobile networks; however, the saturating revenue of mobile broadband and increasing capital expenditure are discouraging mobile operators from investing in next-generation mobile networks. Mobile network sharing is a viable solution for operators and regulators to resolve this dilemma. This research uses a difference-in-differences analysis of 33 operators (including 11 control operators) to empirically evaluate the cost reduction effect of mobile network sharing. The results indicate a reduction in overall operating expenditure and short-term capital expenditure by national roaming. This finding implies that future technology and standards development should focus on flexible network operation and maintenance, energy efficiency, and maximizing economies of scale in radio access networks. Furthermore, mobile network sharing will become more viable and relevant in a 5G network deployment as spectrum bands are likely to increase the total cost of ownership of mobile networks and technical enablers will facilitate network sharing.

• Applied Science and Convergence Technology
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• 제26권5호
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• pp.110-113
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• 2017

The two-dimensional layered $MoS_2$ has high mobility and excellent optical properties, and there has been much research on the methods for using this for next generation electronics. $MoS_2$ is similar to graphene in that there is comparatively weak bonding through Van der Waals covalent bonding in the substrate-$MoS_2$ and $MoS_2-MoS_2$ heteromaterial as well in the layer-by-layer structure. So, on the monatomic level, $MoS_2$ can easily be exfoliated physically or chemically. During the $MoS_2$ field-effect transistor fabrication process of photolithography, when using water, the water infiltrates into the substrate-$MoS_2$ gap, and leads to the problem of a rapid decline in the material's yield. To solve this problem, an epoxy-based, as opposed to a water-based photoresist, was used in the photolithography process. In this research, a hydrophobic $MoS_2$ field effect transistor (FET) was fabricated on a hydrophilic $SiO_2$ substrate via chemical vapor deposition CVD. To solve the problem of $MoS_2$ exfoliation that occurs in water-based photolithography, a PPMA sacrificial layer and SU-8 2002 were used, and a $MoS_2$ film FET was successfully created. To minimize Ohmic contact resistance, rapid thermal annealing was used, and then electronic properties were measured.