• 한국간호교육학회지
• /
• 제19권1호
• /
• pp.87-96
• /
• 2013

Purpose: Competency-based curriculum has attracted many nursing institutions' attention, pursuing the enhancement of competency and the quality of education. The goal of this study was to not merely scrutinize the nomenclature of competency and competency model as a concept of pedagogy as well as nursing science, but also form a well understanding of development process for nursing competency-based curriculum and nursing competency modeling. Methods: A comprehensive review on related literatures was conducted in each section of 1) competency-based curriculum, 2) competency and competency model, and 3) contents of competency. Results: The nomenclature of competency including nursing competencies, competency modeling and competency-based curriculum were clarified and summarized. Through analyzing and reviewing former studies related to competency, desirable nursing competency modeling and nursing competency-based curriculum were proposed and described. Conclusion: Learner-centered curriculum should be established based on nursing education that emphasizes intellectual skills acquisition and the enhancement of future-oriented professionalism. Competency modeling should reflect the fact that teaching-learning strategies should focus on the integration of nursing theories and clinical practices. Nursing competency modeling is essential in order to develop a genuine competency-based curriculum while in-depth practical research should be followed so that nursing theories and clinical practices work together in a coordinated fashion.

• Journal of Electrical Engineering and Technology
• /
• 제10권1호
• /
• pp.364-371
• /
• 2015

In this study, we developed a feasible structure of a textile-based inductive sensor using a machine embroidery method, and applied it to a non-contact type vital sign sensing device based on the principle of magnetic-induced conductivity. The mechanical heart activity signals acquired through the inductive sensor embroidered with conductive textile on fabric were compared with the Lead II ECG signals and with respiration signals, which were simultaneously measured in every case with five subjects. The analysis result showed that the locations of the R-peak in the ECG signal were highly associated with sharp peaks in the signals obtained through the textile-based inductive sensor (r=0.9681). Based on the results, we determined the feasibility of the developed textile-based inductive sensor as a measurement device for the heart rate and respiration characteristics.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제14권9호
• /
• pp.3639-3662
• /
• 2020

The network capability to accomplish its functions in a timely fashion under failures and attacks is known as survivability. Ad hoc routing protocols have been studied and extended to various domains, such as Intelligent Transport Systems (ITSs), Unmanned Aerial Vehicles (UAVs), underwater acoustic networks, and Internet of Things (IoT) focusing on different aspects, such as security, QoS, energy. The existing solutions proposed in this domain incur substantial overhead and eventually become burden on the network, especially when there are fewer attacks or no attack at all. There is a need that the effectiveness of these routing protocols be analyzed in the presence of Denial of Service (DoS) attacks without any intrusion detection or prevention system. This will enable us to establish and identify the inherently stable routing protocols that are capable to survive longer in the presence of these attacks. This work presents a DoS attack case study to perform theoretical analysis of survivability on node and network level in the presence of DoS attacks. We evaluate the performance of reactive and proactive routing protocols and analyse their survivability. For experimentation, we use NS-2 simulator without detection or prevention capabilities. Results show that proactive protocols perform better in terms of throughput, overhead and packet drop.

• Bulletin of the Korean Chemical Society
• /
• 제35권5호
• /
• pp.1485-1490
• /
• 2014

We have designed and developed a new ladder type tetrafused ${\pi}$-conjugated building block such as dihydroindolo[3,2-b]indole (DINI) and investigated its role as an electron rich unit. The photovoltaic properties of a new semiconducting ${\pi}$-conjugated polymer, poly[[5,10-bisoctyl-5,10-dihydroindolo[3,2-b]indole-[5,6- bis(octyloxy)-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole]], represented by PDINI-OBTC8 are described. The new polymer PDINI-OBTC8 was synthesized in donor-acceptor (D-A) fashion, where fused ${\pi}$-conjugated tetracyclic DINI, and 5,6-bis(octyloxy)-4,7-di(thiophen-2-yl) benzo[c][1,2,5]thiadiazole (OBTC8) were employed as electron rich (donor) and electron deficient (acceptor) moieties, respectively. The conventional bulk heterojunction (BHJ) device structure ITO/PEDOT:PSS/PDINI-OBTC8:PCB71M/LiF/Al was utilized to fabricate polymer solar cells (PSCs), which comprises the blend of PDINI-OBTC8 and [6,6]-phenyl-$C_{71}$-butyric acid methyl ester ($PC_{71}BM$) in BHJ network. A BHJ PSC that contain PDINI-OBTC8 delivered power conversion efficiency (PCE) value of 1.68% with 1 vol% of 1,8-diidooctane (DIO) under the illumination of A.M 1.5G 100 $mW/cm^2$.

• Bulletin of the Korean Chemical Society
• /
• 제29권6호
• /
• pp.1157-1161
• /
• 2008

2,6-Dinitrophenol (2,6-DNP) complexes with lanthanide series including yttrium (except Pm, Tm, and Lu) have been synthesized and their crystal structures have been analyzed by X-ray diffraction methods. Singlecrystal X-ray structure determinations have been performed at 296 K on the Ce$\rightarrow$Yb species and shown them to be isomorphous, triclinic, P1, a = 8.6558(2)$\rightarrow$8.5605(3) $\AA$, b = 11.8813(3)$\rightarrow$11.6611(4) $\AA$, c = 13.9650(3) $\rightarrow$13.8341(5) $\AA$, $\alpha$ = 73.785(1)$\rightarrow$73.531(2)o, $\beta$ = 74.730(1)→74.903(2)${^{\circ}}$, $\gamma$ = 69.124(1)→ 69.670 $(2){^{\circ}}$, V = 1266.86(5)→1221.53(7) $$\AA^{3}$$, Z = 2. In Ln(III) complexes, three 2,6-DNP ligands coordinate directly to the metal ion in the bidentate fashion. The nine coordinated Ln(III) ion forms slightly distorted tri-capped trigonal prism. There are no water molecules in the crystal lattice. The dependences of metal to ligand bond lengths are discussed on the atomic number of lanthanide elements. The thermal properties of lanthanide complexes of 2,6- DNP have also studied by TG-DTG and DSC thermal analysis methods.

• 한국컴퓨터정보학회논문지
• /
• 제20권3호
• /
• pp.139-144
• /
• 2015

근래의 안경 산업은 고객들이 다양하게 선택함에 따라 외적 미모를 위한 개성 연출을 위한 도구로서 활용도가 다양화되고 급증하고 있는 추세이다. 특히, 온라인 쇼핑몰은 IT 기술 발전에 힘입어 다양하고 급속하게 성장하면서 온라인 쇼핑 업체들 사이에 경쟁은 더욱 가열되고 있다. 이로 인하여 온 오프라인에서 업체들의 차별화된 마케팅 전략과 특징이 절실하게 요구되며, 자체 경쟁력 확보를 위한 분석과 투자에 많은 노력을 기울이고 있다. 이에 본 연구에서는 계층별 구분하지 않고 다양한 계층에서 이용할 수 있는 개인 맞춤형 온라인 안경산업에 초점을 둔 사이트 구축에 관한 연구이다. 이를 위해서 기존의 대표적인 안경 산업의 특징과 산업 서비스 분석을 통해 차별화된 전략을 제시하고자 한다. 본 연구를 통해 서비스 개발과 실용적인 접목이 이루어진다면 비즈니스 모델의 새로운 가치를 도모할 수 있을 것으로 기대된다.

• 한국식품영양과학회지
• /
• 제23권3호
• /
• pp.443-452
• /
• 1994

This study describes the effects of novel1, 25-dihydroxyvitamin D$_3$ analong[1,25(OH)$_2$-16ene-23yne-26, 27-F6-D$_3$] on proliferation of the human histiocytic lymphoma cell line U937 in vitro. We also examined the expression of c-myc oncogene in U937 cells was apparently inhibited to 62% and 87% of the control level after 4 days in the presence of 10-8M and 10-7 M of this analog, respectively. This compound morpholgically and functionally differentiated U937 cells to nonocyte-macrophage phenotype showing the increase of adherence ability to surface and a decrease of N/C ratio in Giemsa staining . Especially, nonspecific esterase activity which is a marker of cell differentiation to monocyte-macrophage was positive, and production of the positive stained cells increased in a dose dependent fashion . The expression of c-myc oncogene by 1, 25(OH)$_2$D$_3$ analog(10-7 M) was reduced by 60% at the mRNA level as determined by Northern blotting. The effects of this novel analog on cell proliferation and cell differentiation may open op new therapeutic strategies for human disorders such as psoriassis and may provide a tool to understand the mechanism of action of vitamin D$_3$ seco-steroids in malignancy.

• 대한전자공학회논문지SP
• /
• 제38권5호
• /
• pp.509-517
• /
• 2001

전역탐색알고리즘(full-search algorithm, FSA)은 탐색영역의 범위가 커짐에 따라 방대한 양의 계산을 필요로 하기 때문에 이에 따른 알고리듬의 처리시간이 커지고, 하드웨어로 구현했을 때 회로가 복잡해진다는 문제점을 안고 있다. 본 논문에서는 이러한 문제점을 개선하기 위한 방안으로 비트플레인 정합에 의한 움직임 추정기의 VLSI 구조를 제안한다. 제안된 움직임 추정기에서는 비트 플레인 정합기준을 이용하여 기존의 전역 탐색 알고리즘을 하나의 이진영상으로 적용함으로써 움직임 추정에 소요되는 연산의 양을 크게 줄이면 서도 전역탐색 알고리듬과 유사한 움직임 추정 성능을 갖도록 하였으며, 제안된 VLSI 구조에서는 두 개의 프로세싱 코어를 채택하여 데이터 흐름을 시스톨릭 (systolic) 어레이의 형태로 제어하여, 시스템 내부의 SRAM을 제거하여 동작 속도 상의 이득뿐만 아니라, 메모리 공정을 필요로 하지 않는 저가의 공정을 사용 가능하게 함으로써 제작상의 비용을 절감할 수 있는 해결책을 제시하였다. 구현된 하드웨어는 VHDL을 이용하여 설계하고, 기능 검증을 수행한 후 0.6-μm three-metal CMOS 공정을 이용하여 8.15 X 10.84㎟의 크기로 집적하였다.

• 한국가정과교육학회지
• /
• 제26권1호
• /
• pp.55-68
• /
• 2014

본 연구는 중학교 기술 가정교과 의복재료 단원의 수업에서 적용할 수 있는 의복재료 실물 교육자료집과 지도안을 개발함으로써 의복재료 수업 시 학습자의 의복재료에 대한 흥미와 이해를 높일 수 있는 교수 학습매체를 개발하는데 목적을 두었다. 이를 위해 중학생 수준의 의복재료 실물 교육자료집과 학습지, 지도안을 개발하여 실제 수업에 적용하고 그 효과를 분석하였다. 수업 적용은 실물 교육자료집을 활용하여 수업한 실험집단과 의복재료 실물 교육자료집을 활용하지 않고 수업한 통제집단의 수업에 대한 학습흥미도, 학습수용태도, 학업성취도를 비교 분석하였다. 본 연구 결과는 다음과 같다. 첫째, 의복재료 실물 교육자료집을 활용한 실험집단이 의복재료 실물 교육자료집을 활용하지 않은 통제집단보다 학습흥미도가 높았다. 둘째, 의복재료 실물 교육자료집을 활용한 실험집단이 의복재료 실물 교육자료집을 활용하지 않은 통제집단보다 학습수용태도가 높았다. 셋째, 의복재료 실물 교육자료집을 활용한 실험집단이 의복재료 실물 교육자료집을 활용하지 않은 통제집단보다 학업성취도가 높았다.

• 한국의류학회지
• /
• 제36권2호
• /
• pp.179-193
• /
• 2012

The development of modern transportation technology has required many people in spaces (such as vehicle seats, airports, and train stations) for long periods. The public seats provided in these places are manufactured in a standard size; however, fatigue sets in if the seats are unsuitable for the person's physical size. For this reason, this study developed an air cushion vest that would enhance the comfort of vehicle seats. Passengers in vehicles, trains, airplanes, and buses were observed and surveyed to understand the demand for seat comfort. Our analysis found that the greatest source of discomfort was involuntary nodding of the head while asleep and discomfort around the waist area. For this reason, the air cushion vest was designed to support the head and the waist. The neck cushion of this vest was designed to strengthen head support to counter forward nodding because existing commercial neck cushions had no support for forward nodding. For the waist cushion, at lumbar and below-lumbar parts were chosen as the key parts to be supported, the cushion was designed to contain air at those parts. To cover the embedded waist cushion, the vest was designed to be long. The closure was constructed with zippers from the neck to waistline, and with invisible snaps from the waistline to the hemline so that the wearer could open them easily while seated. A subjective comfort evaluation was conducted to verify the effectiveness of the developed vest. In the test, the developed cushions received a better evaluation than cushions currently available on the market. The volume of the vest could be adjusted by the inflow and outflow of air. It was proven that the vest was effective in terms of comfort and portability. This shows that the developed vest could enhance passenger comfort while sitting on vehicle seats.