• 디지털융복합연구
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• 제10권11호
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• pp.467-475
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• 2012

본 연구는 병원간호사의 항암화학요법 제제의 투약안전 체계를 분석하여 투약안전 문제점을 개선하기 위한 6시그마 기법을 적용한 방법론적 연구이다. 연구 결과 함암화학요법 제제 투약의 문제점은 과정, 간호사, 환경 관련의 3가지 요인으로 분석되었으며 임상 현장에서 개선 가능성과 효과가 가장 높은 '약물에 대한 지식과 수행능력의 부족'과 '간호사 대상의 약물 교육 부족' 에 대한 개선 활동을 진행하였다. 개선안으로 제시된 간호사의 항암화학요법 제제 투약안전 교육의 효과 검증을 위한 교육 전 후의 지식과 수행 정도는 통계적으로 모두 유의한 차이를 나타냈다. 간호사의 항암화학요법 제제 투약안전 교육 후 개선 사항을 유지하기 위해 관리 지표, 관리 방법 등에 대한 관리계획서 작성으로 개선 활동을 종료하였으며, 5단계 연구 진행은 투약안전을 목표로 한 간호실무 개선에 의의가 있다.

• 한국연소학회지
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• 제14권4호
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• pp.17-24
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• 2009

Reburning is one of the most useful technologies for reducing nitric oxide in economically and technically. The reburning process was demonstrated as an effective NOx reduction method through injection of a secondary hydrocarbon fuel. An experimental study has been conducted to evaluate the effect of biomass reburning on NOx and CO formation in a light oil flamed combustion furnace. Reburning tests on NOx reduction of air-carried rice husk powder as the reburn fuel and light oil as the main fuel were performed in flames stabilized by a co-flow swirl and fuel staged burner, which was mounted at the front of the furnace. The results included flue gas emissions and temperature distribution in the furnace for several kinds of experimental conditions. It was observed clearly that NOx concentrations in the exhaust have considerably decreased due to effect of biomass reburning. The maximum NOx reduction rate was 42% when the reburn fuel fraction was 0.18. The CO emissions were kept under 42 ppmv in all experimental tests. And this paper makes clear that in order to decrease NOx concentration in the exhaust when the biomass reburning system is adapted, the control of some factors such as reburn fuel fraction and reburn zone fraction is very important.

• 대한전자공학회논문지
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• 제21권5호
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• pp.67-78
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• 1984

프로팅 게이트 위에 컨트롤 게이트를 갖는 n-채널 이중 다결정 실리콘게이트 EAROM을 제작하였다. 채널 길이는 4-8μm, 채널 폭은 5-14μm로 하여 5μm design rule에 따라 설계하였으며 서로 다른 4가지 컨트롤게이트 구조를 갖는 채널 주입형 기억소자를 얻었다. 그리고 소자의 Punch through 전압과 게이트에 의해 조절되는 채널파괴 전압을 증가시키기 위해 이중 이온주입 (double ion implantation)과 active 영역에 보론이온을 주입 하였다. 프로그래밍을 위해 드레인 전압 및 게이트 전압이 각각 13-l7V 및 20-25V 정도 필요하였다. 그리고 제조된 기억소자의 소거는 광학적 방법뿐 아니라 전기적 방법으로도 가능하였으며 125℃에서 200시간 유지하였을 때 축적된 전자가 약 4 %정도 감소함을 알 수 있었다.

• 대한간호학회지
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• 제46권3호
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• pp.443-453
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• 2016

Purpose: The purpose of this study was to define the concept for psychological insulin resistance in the Korean population with diabetes. Methods: The Hybrid model was used to perform the concept analysis of psychological insulin resistance. Results from both the theoretical review with 26 studies and a field study including 19 participants with diabetes were included in final process. Results: The preceding factors of psychological insulin resistance were uncontrolled blood glucose and change in daily life. The concept of psychological insulin resistance was found to have three categories with 8 attributes such as emotional factors (negative feeling), cognitive factors (low awareness and knowledge, low confidence for self-injection) and supportive factors (economic burden, dependency life, embarrassing, feeling about supporters, feeling of trust in, vs mistrust of health care providers). The 8 attributes included 30 indicators. Conclusion: The psychological insulin resistance of population with diabetes in Korea was defined as a complex phenomenon associated with insulin therapy that can be affected by emotional factors, cognitive factors, and supportive relational factors. Based on the results, a tool for measuring psychological insulin resistance of Koreans with diabetes and effective programs for enhancing insulin adherence should be developed in future studies.

• 한국세라믹학회지
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• 제44권6호
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• pp.303-307
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• 2007

Transparent In-doped zinc oxide (IZO) thin films are deposited with variation of pulsed DC power at Ar atmosphere on coming 7059 glass substrate by pulsed DC magnetron sputtering. A c-axis oriented IZO thin films were grown in perpendicular to the substrate. The optical transmittance spectra showed high transmittance of over 80% in the UV-visible region and exhibited the absorption edge of about 350 nm. Also, the IZO films exhibited the resistivity of ${\sim}10^{-3}{\Omega}\;cm$ and the mobility of ${\sim}6cm/V\;s$. Organic Light-emitting diodes (OLEDs) with IZO/N,N'-diphenyl-N, N'-bis(3-methylphenl)-1, 1'-biphenyl-4,4'-diamine (TPD)/tris (8-hydroxyquinoline) aluminum ($Alq_3$)/LiF/Al configuration were fabricated. LiF layer inserted is used as an interfacial layer to increase the electron injection. Under a current density of $100\;mA/cm^2$, the OLEDs show an excellent efficiency (9.4 V turn-on voltage) and a good brightness ($12000\;cd/m^2$) of the emission light from the devices. These results indicate that IZO films hold promise for anode electrodes in the OLEDs application.

• 한국지능시스템학회논문지
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• 제19권1호
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• pp.83-89
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• 2009

일반적으로 자동차용 냉각팬은 차랑 냉각기의 온도를 낮추기 위해 사용되고 있다. 자동차용 냉각팬은 플라스틱 사출 공정에 의해 제작되며 사출시 사용되는 모재의 불균일성으로 인해 냉각팬 날개의 무게 중심이 중심에서 벗어나는 경우가 발생하게 된다. 이러한 불균형은 자동차 소음의 주된 원인이 되기 때문에 이에 대한 검사는 필수적으로 요구된다. 이에 본 연구에서는 로드셀을 이용한 냉각팬 회전날개에서 발생되는 불균형의 위치 및 크기를 효율적으로 검출할 수 있는 팬 밸런서 시스템을 제안하고 제안된 시스템의 불평형 검출 성능 확인을 위해 실제 적용 실험을 수행하였다.

• Journal of Electrical Engineering and Technology
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• 제13권2호
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• pp.608-619
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• 2018

As distributed generation (DG) is connected to grid, there is new node-type occurring in distribution network. An efficient algorithm is proposed in this paper to calculate power flow for weakly meshed distribution network with DGs in different load models. The algorithm respectively establishes mathematical models focusing on the wind power, photovoltaic cell, fuel cell, and gas turbine, wherein the different DGs are respectively equivalent to PQ, PI, PQ (V) and PV node-type. When dealing with PV node, the algorithm adopts reactive power compensation device to correct power, and the reactive power allocation principle is proposed to determine reactive power initial value to improve convergence of the algorithm. In addition, when dealing with the weakly meshed network, the proposed algorithm, which builds path matrix based on loop-analysis and establishes incident matrix of node voltage and injection current, possesses good convergence and strong ability to process the loops. The simulation results in IEEE33 and PG&G69 node distribution networks show that with increase of the number of loops, the algorithm's iteration times will decrease, and its convergence performance is stronger. Clearly, it can be effectively used to solve the problem of power flow calculation for weakly meshed distribution network containing different DGs.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.51-54
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• 2007

Top-emission 3.5 inch qVGA IOD (Inverted AMOLED) was fabricated with inverted EL structure driven by a-Si TFT backplane. In order to get stable driving TFT, we used FCP(Field Control Plate) layer which was connected with the source of the driving TFT. And we developed planarization process to planarize the cathode layer which was the bottom layer of inverted OLED. Our unique IOD structure is “a-Si TFT/ Al(Cathode)/ LiF/ LG-201(ETL)/ EML(RGB)/ HTL/ LG-101(HIL & Buffer layer)/ IZO(Anode)”. LG-201(ETL) layer was studied for more efficient electron injection from cathode to EML, and LG-101(HIL & Buffer layer) covered by IZO anode was also explored for decreasing the EL surface damage.

• 대한기계학회논문집
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• 제19권11호
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• pp.3054-3062
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• 1995

Recently, the improvement of fuel economy and the reduction of exhaust smoke and NOx have been successfully achieved by supplying diesel engines with emulsified diesel oil with water particles. In the present paper, the difference between the combustion of injected emulsified fuel and that of diesel oil spray is clarified by means of taking high-speed and color photographs of the flames in the engine cylinder. As the results, the two kinds of fuels show different combustion behavior each other in the growth of initial flame and in the termination of combustion process in the cylinder. Then, suitable combustion chamber design for the use of emulsified fuel is discussed on the basis of experimental data for various distribution of spray in different kinds of piston cavities. Some methods of clearing troubles caused by emulsified fuel injection are also discussed on the basis of performance tests with a remodeling test engine.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 춘계학술대회
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• pp.1475-1480
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• 2004

Plasma Enhanced Chemical Vapor Deposition (PECVD) process uses unique property of plasma to modify surfaces and to achieve the high deposition rates. In this study, a vertical thermal RF-PECVD (Radio Frequency-PECVD) reactor is modeled to investigate thermal flow and the deposition rates with various shapes of the showerhead. The showerhead in the CVD reactor has the shape of a ring and gases are injected in parallel with the susceptor, which is a rotating disk. In order to achieve the high deposition rates, we have simulated the thermal flow fields in the reactor with several showerhead models. Especially the effects of the number of injection holes and the rotating speed of the susceptor are studied. Using a commercial code, CFDACE, which uses FVM (Finite Volume Method) and SIMPLE algorithm, governing equations have been solved for the pressure, mass-flow rates and temperature distributions in the CVD reactor. With the help of the Nusselt number and Sherwood number, the heat and mass transfers on the susceptor are investigated. In order to characteristics of measure the flatness of the layer, furthermore, the relative growth rate (RGR) is considered.