• 한국신재생에너지학회:학술대회논문집
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• 2007.11a
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• pp.8-11
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• 2007

SOFC 스택 밀봉재로서 $SiO_2-R_2O_3$계를 선정하여 $R_2O_3$와 RO를 변화 하였을 때 유리 전이 온도, 열팽창계수, 이종 물질간의 젖음성, 환원 가스에 반응성 등을 조사하였다. 또한 모유리에 filler를 넣었을 때 filler 첨가에 따른 특성을 조사한 결과 $B_2O_3/SiO_2$ 함량비 증가에 따라 열팽창계수는 증가하였고 전이점은 낮아졌으며 밀봉재를 이용한 SUS 와 SUS를 $800^{\circ}C$ 접합 후 산화 ${\cdot}$ 환원분위기에서 작동했을 때. 화학적 반응 및 확산 반응층은 관찰되지 않았다.

• Journal of Korean Medicine Rehabilitation
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• v.33 no.4
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• pp.61-78
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• 2023

Objectives This systematic review aimed to analyze the effectiveness, safety and the reporting quality of scalp acupuncture (SA) treatment for musculoskeletal disease (MSD). Methods Eleven databases were systematically searched up to July 12th 2023. Randomized controlled trials (RCTs) of SA treatment for MSD were selected manually by the inclusion criteria. The risk of bias of RCTs was assessed using the Cochrane's Risk of Bias (RoB) 1.0 and the reporting quality of studies was evaluated using Consolidated Standards of Reporting Trials (CONSORT) 2010 statement and Standards for Reporting Interventions in Clinical Trials of Acupuncture (STRICTA) 2010 checklist. Results Ten clinical studies were met the inclusion criteria. Most of studies reported SA treatment significantly alleviated pain and functional disability of MSD patients and no serious adverse effects were reported. In RoB assessment, blinding of participants and personnel was found to have the highest RoB and allocation concealment was found to have the most unclear RoB. In CONSORT 2010 statement evaluation, all studies reported 15.3 items (41.4%) on average. In STRICTA 2010 checklist evaluation, all studies reported 11.2 items (65.9%) on average. Conclusions The systematic review found that SA treatment may alleviate pain and functional disability of MSD patients and have little severe adverse effect. The reporting quality of included studies was mainly low, therefore, further studies with strict adherence to the CONSORT and STRICTA checklist should be encouraged.

• Bulletin of the Korean Mathematical Society
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• v.54 no.2
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• pp.705-714
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• 2017

Let $A^2_{{\alpha},{\beta}}(\mathbb{B}_n)$ denote the space of holomorphic functions that are $L^2$ with respect to a weight of form ${\omega}_{{\alpha},{\beta}}(z)=(1-{\mid}z{\mid}^{\alpha}e^{-{\frac{\beta}{1-{\mid}z{\mid}}}}$, where ${\alpha}{\in}\mathbb{R}$ and ${\beta}$ > 0 on the unit ball $\mathbb{B}_n$. We obtain some results for the boundedness and compactness of $Ces{\grave{a}}ro$ operator on $A^2_{{\alpha},{\beta}(\mathbb{B}_n)$.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.4B
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• pp.559-565
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• 2010

In Mobile IPv6 handover should be followed by RO(Route Optimization) to support direct communication between a MN(Mobile Node) and CN(Correspondent Node). For this RR MIPv6 must perform RR(Return Routability) procedure before BU(Binding Update) to CN. The Fast Handover for MIPv6(FMIPv6) also performs the RR test for MN to communicate with CN directly. However, Return Routability test has long latency resulting in handover delay in MIPv6. This paper proposes the method to reduce the handover deay by reducing RO latency in FastMobile IPv6.

• Journal of Plant Biotechnology
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• v.39 no.4
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• pp.281-287
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• 2012

This experiment was conducted to investigate the effect of various type of Magma seawater (MSW) concentrations on plant growth and useful mineral contents in Bletilla striata. In the RO (Reverse Osmosis) and ED (Electronic Distal) treatment, hardness of medium was poored in 3.0 g/L gelrite but increased in 8.0 g/L plant agar, 38,000 and $2,000g/cm^2$ respectably. We analyzed the morphological and physiological characteristics differences of B. striata treated various MSW. Survival frequency of plant and growth (shoot length, shoot diameter, root length, root diameter, shoot/root ratio) were significantly increased in RO and ED treatment at 50% and 10%, especially. Chlorophyll contents in ED treatments were higher than those in control and RO treatment. The content of strontium (Sr) in 20, 50, 75, 100% ED treatment, were higher than those in the control and RO, ED 1, 5, 10% treatment. These results showed that treatment of ED with the range of 20~100% could be used to supply the strontium enriched orchid plant. It is considered that MSW may be applied for use in Magma seawater to promotion of growth and produced functional plant.

• Proceedings of the Materials Research Society of Korea Conference
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• 2003.03a
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• pp.213-213
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• 2003

저온소성 가능하며 저 융점유리인 고 투과율의 Pb-free 조성으로서 PDP(Plasma Display panel)의 투명유전체에 응용하고자 P$_2$O$_{5}$-ZnO-RO 계인 인산염 유리의 열적, 광학적성질을 연구하였다. 이 삼원계인 인산염유리계를 PDP의 투명 유전체에 응용하기에는 열적특성에서 문제점이 제기되어, (30-50)P$_2$O$_{5}$ - (20-50)ZnO - (15-45) RO (mol%)계에 유리망목형성제인 A1$_2$O$_3$, SiO$_2$, B$_2$O$_3$등을 첨가하여 열적성질 및 소성후 투광성 등을 조사하였다. 열적특성은 DTA와 TGA를 이용하여 유리전이점(Tg) 및 선팽 창계수(CTE)와 연하점(Ts) 을 측정하였으며, 투광성은 500-58$0^{\circ}C$에서 1시간동안 소성하여 UV-visible spectrometer을 이용하였다 그 결과로, 380-46$0^{\circ}C$의 Tg와 8-$10^{-6}$K의 CTE 및 70-80%의 광투과율을 나타내었다. 이러한 결과는 P$_2$O$_{5}$-ZnO-RO계는 PDP의 투명유전체에 적용하기에는 상당히 높거나 낮은 Tg를 형성하였지만 유리형성제를 수 mol%을 첨가함으로써 적절한 Tg점과 높은 투과율을 얻을 수 있었다.수 있었다.

• Korean Chemical Engineering Research
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• v.53 no.6
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• pp.808-813
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• 2015

Boron is difficult to be removed from seawater by simple RO (reverse osmosis) membrane process, because the size of boric acid ($B(OH)_3$), the major form of aqueous boron, is as small as the nominal pore size of RO membrane. Thus, the complexation of boric acid with polyols was suggested as an alternative way to increase the size of aqueous boron compounds and the complexation behavior was investigated with Raman spectroscopy. As a reference, the Raman peak for symmetric B-O stretching vibrational mode both in boric acid and borate ion (${B(OH)_4}^-$) was selected. A Raman peak shift ($877cm^{-1}{\rightarrow}730cm^{-1}$) was observed to confirm that boric acid in water is converted to borate ion as the pH increases, which is also correctly predicted by frequency calculation. Meanwhile, the Raman peak of borate ion ($730cm^{-1}$) did not appear as the pH increased when polyols were applied into aqueous solution of boric acid, suggesting that the boric acid forms complexing compounds by combining with polyols.

• The Korean Journal of Food And Nutrition
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• v.29 no.2
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• pp.178-185
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• 2016

This study was designed to develop and to qualify a coffee alternative beverage using a mixture of coffee beans and roasted black beans (Rhynchosia nulubilis). Therefore, the total isoflavone content (TIC), total phenol content (TPC), antioxidant activity, anti-inflammatory activity, NFATc1 (Nuclear factor of activated T-cells c1) expression in RANKL (receptor activator of nuclear factor kappa-B ligand)-stimulated RAW264.7 cells and sensory evaluation were measured for 5 different Cb (coffee bean)-RoS (roasted seomoktae) mixture extracts (Cb100RoS0, Cb75RoS25, Cb50RoS50, Cb25RoS75, and Cb0RoS100). Cb0RoS100 had the highest TIC ($516.83{\pm}36.61mg/100g$) and TPC ($18.11{\pm}1.77mg$ TAE/100 g) along with the highest antioxidant activity as measured by DPPH radical scavenging activity ($73.55{\pm}8.11%$) and ABTS radical scavenging activity ($63.27{\pm}7.27%$). Also, Cb0RoS100 showed the highest anti-inflammatory activity as measured by NO production ($13.57{\pm}2.21{\mu}M$) and PGE2 production ($3.25{\pm}0.21ng/mL$). The more the RoS ratio was increased in the mixtures of Cb-RoS, the more the NFATc1 protein expression was decreased in RANKL-stimulated RAW264.7 cells. In case of sensory evaluation, Cb50RoS50 had the highest scores for flavor, delicate flavor and overall quality, which were similar to those in Cb alone (Cb100RoS0). We suggest that the use of RoS replacement instead of Cb in/as a coffee alternative beverage may help to reduce the risk of caffeine-related bone loss and/or bone disease by effectively blocking NFATc1 expression in RANKL-stimulated RAW264.7 cells compared with Cb alone.

• Proceedings of the Materials Research Society of Korea Conference
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• 2011.10a
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• pp.33.2-33.2
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• 2011

고온형 SOFC의 개발에 있어 스택의 신뢰성을 확보하는데 가장 중요한 핵심기술은 스택 구성요소 사이를 접합하는데 필요한 고온형 밀봉재의 개발이다. SOFC 스택에서의 밀봉재는 고체전해질과 접속자 사이에서 음극에 공급되는 연료가스와 양극에 공급되는 공기가 서로 혼합되는 것을 방지하는 역할은 물론 기계적으로 취약한 단전지의 보호 및 스택전체 구조물의 구조적 일체성(Structural integrity)을 부여하는데 주목적이 있다. 현재 기체 기밀성을 유지하기 위한 밀봉재는 크게 유리 및 결정화 유리계, mica및 mica/유리복합재료, 유리/충전재 복합재료 등이 사용되고 있으나 다수의 단위전지로 구성되는 스택 구성에서 스택의 열기계적 안정성 및 장기수명을 보장하기 위해서는 본 연구에서 개발하고자 하는 복합밀봉재가 가장 적합할 것으로 예상되고 있다. 본 연구에서는 $SiO_2-B_2O_3-RO$계에 BaO, SrO를 일정비율로 첨가하여 제작된 유리 frit을 열처리하여 물리화학적 물성변화를 검토하였으며, $700^{\circ}C$ 이하의 연화점을 갖는 유리를 기지상으로 하고 세라믹 보강재를 첨가한 고온형 복합밀봉재를 개발하고 그 물리화학적 안정성, 열기계적 안정성 및 밀봉 특성을 평가하였다.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.25 no.5
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• pp.731-740
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• 2001

A numerical study on the quantitative analogy between the fully developed turbulent flow in a straight square duct rotating about an axis perpendicular to that of the duct and that in a stationary curved duct of square cross-section is carried out. In order to clarify the similarity of the two flows, dimensionless parameters K(sub)TR=Re(sup)1/4/√Ro and Rossby number, Ro, in a rotating straight duct flow were used as a set corresponding to K(sub)TC=Re(sup)1/4/√λ and curvature ratio, λ, in a stationary curved duct flow so that they have the same dynamical meaning as those of the fully developed laminar flows. For the large values of Ro or λ, it is shown that the flow field satisfies the asymptotic invariance property, that is, there are strong quantitative similarities between the two flows such as flow patterns and friction factors for the same values of K(sub)TR and K(sub)TC.