• Nonlinear Functional Analysis and Applications
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• 제26권3호
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• pp.451-474
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• 2021

In this paper, we investigate a hybrid algorithm for finding zeros of the sum of maximal monotone operators and Lipschitz continuous monotone operators which is also a common fixed point problem for finite family of relatively quasi-nonexpansive mappings and split feasibility problem in uniformly convex real Banach spaces which are also uniformly smooth. The iterative algorithm employed in this paper is design in such a way that it does not require prior knowledge of operator norm. We prove a strong convergence result for approximating the solutions of the aforementioned problems and give applications of our main result to minimization problem and convexly constrained linear inverse problem.

• 의학교육논단
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• 제23권3호
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• pp.147-153
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• 2021

The coronavirus disease 2019 (COVID-19) pandemic made it necessary for medical schools to restructure their curriculum by switching from face-to-face instruction to various forms of flexible learning. Flexible learning is a student-centered approach to learning that has received interest in many educational sectors. It is a critical strategy for expanding access to higher education during the pandemic. As flexible learning includes online, blended, hybrid, and hyflex learning options, learners have the opportunity to select an instruction modality based on their needs and interests. The shift to flexible learning in medical education took place rapidly in response to the COVID-19 pandemic, and learners, instructors, and schools were not prepared for this instructional change. Through the lens of the technology acceptance model, human agency, and a social constructivist perspective, I examine students, instructors, and educational institutions' roles in successfully navigating the digital transformation era. The pandemic has also accelerated the use of advanced information and communication technologies, such as artificial intelligence and virtual reality, in learning. Through a review of the literature, this paper aimed to reflect on current flexible learning practices from the instructional design and educational technology perspective and explore emerging technologies that may be implemented in future medical education.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권9호
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• pp.4145-4164
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• 2016

Energy harvesting is an increasingly attractive source of power for cellular networks, and can be a promising solution for green networks. In this paper, we consider a cellular network with power beacons powering multiple mobile terminals with microwave power transfer in energy beamforming. In this network, the power beacons are powered by grid and renewable energy jointly. We adopt a dual-level control architecture, in which controllers collect information for a core controller, and the core controller has a real-time global view of the network. By implementing the water filling optimized power allocation strategy, the core controller optimizes the energy allocation among mobile terminals within the same cluster. In the proposed green energy cooperation paradigm, power beacons dynamically share their renewable energy by locally injecting/drawing renewable energy into/from other power beacons via the core controller. Then, we propose a new water filling optimized green energy cooperation management strategy, which jointly exploits water filling optimized power allocation strategy and green energy cooperation in cellular networks. Finally, we validate our works by simulations and show that the proposed water filling optimized green energy cooperation management strategy can achieve about 10% gains of MT's average rate and about 20% reduction of on-grid energy consumption.

• Asian-Australasian Journal of Animal Sciences
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• 제20권5호
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• pp.627-632
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• 2007

FoxO1, FoxO3a and FoxO4 belong to the FoxO gene family, which play important roles in the PI3K/PKB pathway. In this study, we cloned the porcine FoxO1, FoxO3a and FoxO4 sequences and assigned them to SSC11p11-15, SSC1p13 and SSC xq13 using somatic cell hybrid panel (SCHP) and radiation hybrid panel (IMpRH). RT-PCR results showed that these three genes are expressed in multiple tissues. Sequencing of PCR products from different breeds identified a synonymous T/C polymorphism in exon 2 of FoxO3a. This FoxO3a single nucleotide polymorphism (SNP) can be detected by AvaII restriction enzyme. The allele frequencies of this SNP were investigated in Dahuabai, Meishan, Tongcheng, Yushan, Large White, and Duroc pigs. Association of the genotypes with growth and carcass traits showed that different genotypes of FoxO3a were associated with carcass length and backfat thickness between 6th and 7th ribs (BTR) and drip loss (p<0.05).

• 한국강구조학회 논문집
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• 제25권1호
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• pp.47-59
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• 2013

본 연구는 신형상 U형 합성보의 1차 휨실험에 연이은 2차 연구로 U형 합성보와 기둥 접합부의 내진성능시험이다. 실험 변수는 기둥의 종류와 보 춤, 보 상부 플레이트 연속유무, 보 단부 철근 수 등으로 3개의 실험체를 제작하였다. 기둥의 종류는 철골 철근콘크리트 기둥과 CFT 형상의 ACT기둥이며, 보 춤은 300, 500(mm)이다. 접합부상세는 일반적으로 많이 적용하고 있는 짧은 브라켓을 활용한 볼트 접합부이다. 실험결과 변형능력은 2~4(%)의 층간변위각을 확보하였으며, 최대모멘트는 부휨모멘트의 경우 공칭모멘트 이상의 내력이 나타났다.

• 대한기계학회논문집 C: 기술과 교육
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• 제4권1호
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• pp.19-26
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• 2016

하이브리드 지열 히트펌프 시스템은 열원을 안정적으로 유지하기 위해 보조 히트싱크나 보조 열원을 활용한다. 본 연구에서는 병원 건물에 설치한 지열-냉각탑 하이브리드 시스템의 냉난방 성능을 분석하였다. 시스템에 각종 센서와 계측 장비를 설치하였으며, 2014년 2월부터 2015년 2월까지 측정한 데이터를 이용하여 성능을 분석하였다. 냉방 기간 중, 냉수 공급 온도는 평균 $11.7^{\circ}C$이었으며, 설계 온도인 $12^{\circ}C$를 넘지 않았다. 또한 난방 기간 중에는 일평균 $39^{\circ}C{\sim}40^{\circ}C$의 온수를 공급하였다. 지열 히트펌프만의 월 평균 성능지수는 3.8에서 8.4의 범위에서 변하였다. 반면 냉각탑을 포함한 하이브리드 지열시스템의 월 평균 성능지수는 2.6에서 6.6 사이에서 변하였다.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2009년도 추계학술발표대회
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• pp.12.1-12.1
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• 2009

Nano-hydroxyapatite (N-HAp)has shown the pivotal role in producing bone-regenerative materials since it has similarity to natural bone minerals in terms of size, morphology, and the composition. Currently, the combination of biopolymers and N-HAp is recognizedas an attractive approach in generating hybrid scaffolds for bone tissueengineering. Surface engineering is an important issue since it determines whether cells can effectively adhere and proliferate on porous scaffolds. We aim to develop a synthetic approach to porous 3D scaffolds by immobilizing N-HAp on pore surfaces. The discrete nano-level anchoring of N-HAp on the scaffold pore surface is achieved using surface-repellent stable colloidal N-HAp with surface phosphate functionality. This rational surface engineering enables surface-anchored N-HAp to express its overall intrinsic bioactivity,since N-HAp is not phase-mixed with the polymers. The porous polymer scaffolds with surface-immobilized N-HAp provide more favorable environments thanconventional bulk phase-mixed polymer/N-HAp scaffolds in terms of cellular interaction and growth. In vitro biological evaluation using alkalinephosphatase activity assay supports that immobilized N-HAp on pore surfaces of polymer scaffolds contributed to the more enhanced in vitro osteogenicpotential. Besides, the scaffolds with surface-exposed N-HAp provide favorable environments for enhanced in vivo bone tissue growth, estimated by characteristic biomarkers of bone formation such as collagen. The results suggest that newly developed hybrid scaffolds with surface-immobilized N-HApmay serve as a useful 3D substrate with pore surfaces featuring excellent bonetissue-regenerative properties. Acknowledgement. This research was supported by a grant (code #: 2009K000430) from 'Center for Nanostructured Materials Technology' under '21st Century Frontier R&D Programs' of the Ministry of Education, Science and Technology, Korea.

• Journal of Plant Biotechnology
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• 제33권2호
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• pp.99-104
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• 2006

L. longifilorum Georgia $\times$ L. elegans Kakutanohikari 잡종 배로부터 유식물체를 분화시키고, 이때 유도된 캘러스의 증식과 이 캘러스로부터 유식물체 분화과정을 조직학적으로 관찰하였다. 잡종 배는 배양한 60개 절편 중 48개 절편에서 86개체의 배주가 발아되었으며, 1 mg/L NAA가 캘러스로부터 식물체의 재분화에 가장 효과적이었으며, 재분화를 억제한 캘러스만을 증식시키기 위해서는 0.1 mg/L NAA + 1 mg/L BA가 가장 양호하였다. 또한 Pyridoxin-HCI을 첨가하지 않은 경우에는 유식물체의 재분화가 거의 보이지 않았으며 50 mg/L의 Pyridoxin-HCI을 첨가한 배지에서 유식물체의 재분화가 가장 효과적이었다. 배에서 발생된 캘러스의 원형성층 지역으로부터 체세포배가 형성되었으며, NAA가 전형성층 부분에서 배발생적 세포 또는 전배 발생의 증식을 자극하는 것으로 생각되었다.

• 한국융합학회논문지
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• 제10권7호
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• pp.343-354
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• 2019

본 연구는 포커스 그룹 인터뷰를 통해 PBL 부분통합 교과과정에 대한 간호학생의 인식을 파악하기 위한 질적연구이다. 연구대상자는 간호학과 4학년 학생이며, 총 25명을 4개의 그룹으로 나누어 인터뷰를 진행하였다. 자료는 의미있는 주제를 찾기 위해 내용분석을 실시하였다. 본 연구결과 6개의 주제가 도출되었다. 1) PBL 부분통합 교과과정의 비효율성 2) 학습에 대한 불안 3) PBL 운영에 대한 불만 4) 조별활동의 어려움 5) PBL에 대한 수용 6) 변화와 만족이 도출되었다. 본 연구결과를 바탕으로 다음을 제안한다. PBL에서 학습내용의 손실을 최소화 할 수 있는 방안과 과정평가 비중을 높여 PBL 평가의 본래 취지를 살려야 할 것이며 PBL 전문가와 전문부서에 의한 세분화된 튜터 교육프로그램이 개발, 운영되어야 할 것이다.

• 반도체디스플레이기술학회지
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• 제18권3호
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• pp.52-59
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• 2019

Styrene-butadiene rubber (SBR) composites, incorporated with graphene, molybdenum disulfide and their hybrid in different filling ratio, were fabricated by a two roll-mill. The dispersion states of all the samples' matrix were employed by carbon black dispersion tester. The curing properties of the pre-vulcanized rubber composites were investigated, after molding by heating press machine, the tensile strength, storage modulus, friction coefficient, the swelling property had also been tested according to ASTM. The composite G1M10 (filling with 1 phr graphene and 10 phr molybdenum) showed the best mechanical properties and viscoelastic properties in this research with a better filler dispersion state and more compact matrix structure.