정부의 양극화 해소방안에 대하여 2

박상원,Park, Sang-Won 한국인삼전략화협의회 2006 인삼·약초 Vol.4 No.3

DC 스퍼터법과 비대칭 양극성 펄스 스퍼터법으로 제작된 고분자 전해질 연료전지 금속분리판용 CrN 코팅막의 특성 연구

박상원,전성용,Park, Sang-Won,Chun, Sung-Yong 한국세라믹학회 2013 한국세라믹학회지 Vol.50 No.6

Nanocrystalline CrN films were deposited on Si (100) substrates by means of asymmetric pulsed DC reactive magnetron sputtering. We investigated the growth behavior, corrosion resistance and mechanical properties of CrN films with a change in the duty cycle and pulse frequency. The grain size of the CrN films decreased from 25.4 nm to 11.2 nm upon a decrease in the duty cycle. The corrosion potentials for the CrN films by DC sputtering was approximately - 0.6 V, and it increased to - 0.3 V in the CrN films which underwent pulsed sputtering. The nanoindentation hardness of the CrN films also increased with a decrease in the duty cycle. This enhancement of the corrosion resistance and mechanical properties of pulsed sputtered CrN films could be attributed to the densification and surface smoothness of the microstructure of the films.

미소 전류 자극이 TPS-IMZ 임프란트 주위의 골유착과 골형성에 미치는 영향

박상원,양홍서,Park, Sang-Won,Yang, Hong-So 대한치과보철학회 1996 대한치과보철학회지 Vol.34 No.4

The purpose of this study is to investigate the effect of constant direct current electrical stimulation in healing the bone defects and surrounding tissues of the endo-oseous(TPS-IMZ) implants. Implants were inserted in the femur of adult dogs. Then a constrant direct current of approximately $10{\mu}A$ was applied. Artificial bone defects were prepared on one side of the implant site. Experimental groups were divided into 4 : control group : bone defect without treatment group I : bone defect filled with hydroxyapatite powders group II : bone defect, in which a negative and positive electrodes were inserted 5mm apart from both sides of the implant group III : bone defect, in which negative current was directly connected to the IMZ implant and a positive electrode was placed 10mm apart from the implant The animals were sacrificed in the 1st, 2nd, 4th and 8th week after implantation for the light microscopic examination. The results obtained were as follows : 1. In electrically stimulated experimental groups, new bone formation and osseointegration around implants were accelerated. 2. Group III showed the greatest activity in new bone formation. Osteoconductivity around HA particles was observed in group 1. 3. The defect area of the control group was healed by forming new bone, which grew from the underlying cancellous bone. The defect areas of the electrically stimulated experimental groups were healed by newly formed bone, which grew upward from the cancellous bone and downward from the periosteum. 4. 8 weeks after implantation, all the groups showed good osseointegration between the surrounding bone and implants.

XML 데이터베이스 지원을 위한 통합 환경

박상원,민경섭,김형주,Park, Sang-Won,Min, Kyung-Sub,Kim, Hyoung-Joo 한국정보과학회 2000 정보과학회 컴퓨팅의 실제 논문지 Vol.15 No.11

웹에서 정보 전달의 수단으로 등장한 XML은 많은 응용 분야에서 사용될 것이다. 많은 양의 XML 문서를 효율적으로 다루기 위하여 데이타베이스의 지원은 필수적이다. 데이터베이스를 이용하여 XML 데이타를 처리할 때 데이타베이스이 종류뿐만 아니라 그 인터페이스도 중요한 문제이다. 본 논문에서는 관계형 데이터베이스, 객체지향형 데이터베이스 및 랩포를 이용하여 XML 데이타를 저장, 질의하며 그 인터페이스로 XML-뷰, ODMG C++바인딩, OQL, DOM을 사용하였다. 또한 각각의 시스템의 구현을 통하여 각 방법들의 장단점을 논하고, 효율적인 XML 문서 처리에 대한 방법을 제시한다. XML will be used in lots of areas in the Web environment as a method of information exchange, We have to use dat'abases to manipulate lots of XML documents efficiently, When we use database to manipulate XML, not only type of database but also its interface is important We develop a system using relational database, object-oriented database and wrapper to store XML data, of which interfaces are XML-View, ODMG C++ binding, OQL and DOM, We discuss pros and cons of each method by the implementation of the system, and propose an efficient manipulation method of XNIL documents.

황화철($FeS,\;FeS_{2}$)을 이용한 헥사클로로에탄의 환원적 분해반응과 표면특성에 관한 연구

박상원,김성국,허재은,Park Sang-Won,Kim Sung-Kuk,Heo Jae-Eun 한국지하수토양환경학회 2006 지하수토양환경 Vol.11 No.5

The following results were obtained in the reductive degradation of hexachloroethane (HCA), and surface characteristics by using iron sulfide ($FeS,\;FeS_{2}$) mediators. HCA was degraded to pentachloroethane (PCA), tetrachloroethylene(PCE), trichloroethylene(TCE) and cis-l,2-dichloroethylene (cis-1,2-DCE) by complicated pathways such as hydrogenolysis, dehaloelimination and dehydrohalogenation. FeS had more rapid degradation rates of organic solvent than $FeS_{2}$. In liquidsolid reaction, the reaction rates of organic solvents were investigated to explain surface characteristics of FeS and $FeS_{2}$.. To determine surface characteristics of FeS and $FeS_{2}$, the specific surface area and surface potential of each mineral was determined and the hydrophilic site ($N_{s}$) was calculated. The specific surface area ($107.0470m^{2}/g\;and\;92.6374m^{2}/g$) and the $pH_{ZPC}$ of minerals ($FeS\;PH_{ZPC}=7.42,\;FeS_{2},\;PH_{ZPC}=7.80$) were measured. The results showed that the Ns of FeS and $FeS_{2}$ were $0.053\;site/mm^{2}\;and\;0.205\;site/mm^{2}$, respectively. $FeS_{2}$ had more hydrophilic surface than FeS. In other words, FeS have more hydrophobic surface site than $FeS_{2}$. 본 논문에서는 황화철($FeS,\;FeS_{2}$) 유기 용매의 환원적 분해 반응과의 표면특성의 관계에 대해서 다음과 같은 결과를 얻었다. hexachloroethane(HCA)은 수소첨가반응, 탈염소제거반응과 탈수소탈염소화반응으로 pentachloroethane(PCA), tetrachloroethylene(PCE), trichloroethylene(TCE)와 cis-1,2-dichloroethylene(cis-1,2-DCE)로 분해되었다. FeS와 $FeS_{2}$를 반응 매개물로 HCA에 대한 반응에서 FeS는 $FeS_{2}$보다 분해반응 속도가 빠르게 나타났다. FeS와 $FeS_{2}$의 표면 특성 연구에서 각 광물질에 대한 친수성 표면 자리(Ns)를 정량적으로 계산하기 위해서 비표면적 값($107.0470m^{2}/g$와 $92.6374m^{2}/g$)과 표면 전위를 측정에 측정된 $PH_{ZPC}(FeS,\;PH_{ZPC}=7.42,\;FeS_{2},\;PH_{ZPC}=7.80)$ 값을 이용해서 계산한 결과 FeS와 $FeS_{2}$의 $N_{s}$값은 각각 $0.053\;site/nm^{2},\;0.205\;site/nm^{2}$으로 나타났다. 그리고 0.2 g/L Fe광물질에 대한 실질적인 친수성 표면 농도는 각각 $3.303{\times}10^{-6}\;mol/L$와 $1.102{\times}10^{-5}\;mol/L$ 나타났다. $FeS_{2}$는 FeS에 비해 훨씬 친수성 표면임을 실험 결과 확인하였다. FeS와 $FeS_{2}$의 두 광물질 중에서 유기 용매의 환원 반응 속도는 FeS가 훨씬 빠르게 나타났다.

2006대한민국 발명특허대전 시상식 인사말씀

박상원,Park, Sang-Won 한국발명진흥회 2007 發明特許 Vol.32 No.1

버터플라이 밸브 하류 유동의 안정화에 관한 연구

박상원,이상우,Park, Sang-Won,Lee, Sang-U 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.11

A flow stabilizer, which is made of a honeycomb and three different mesh screens, is located downstream of a butterfly-type valve, for the reduction of flow disturbances behind the valve. Mean flow and turbulence measurements as well as flow visualizations are conducted in the downstream region of the deepens the non-uniformity of the streamwise velocity component and turbulence. The mesh screens considerably reduce the turbulence and enhance the uniformity of mean velocities. The combination of the honeycomb and the three mesh screens results in an efficient reduction in the flow disturbances. In addition, the flow stabilizer proves to have a good performance in the suppression of turbulence at a short distance.

식각된 비 귀금속 합금과 법랑질간의 접착 인장강도에 대한 연구

박상원,양홍서,Park, Sang-Won,Yang, Hong-So 대한치과보철학회 1987 대한치과보철학회지 Vol.25 No.1

The purpose f this study was to evaluate the effect of resin film thickness on the tensile bond strength and to compare the tensile bond strengths of 4 differently treated metal surfaces. For the experiment, seventy metal specimens were cast with Verabond and divided into I, II, III, groups. The metal specimens in group I were electrolytically etched and cemented with Panavia under finger pressure. Cement film thickness was regulated with metal spacers. The metal specimens in Group II were treated by 4 methods, such as electrolytic etching method, salt-roughened method, EZ-oxisor method , chemical etching method and cemented with Panavia. In group III, electrolytically etched metal specimens were cemented with Hy-Bond. The etched surface of metal specimens and the cement film thickness were examined under the scanning electron microscope. Results were as follows; 1. The tensile bond strength showed no significant difference between $30{\mu}m,\;80{\mu}m,\;130{\mu}m$ film thicknessspecimens. 2. There was no significant difference in the tensile bond strength between the 4 differently treated metal specimens. 3. The tensile bond strength showed significant difference between Panavia and Hy-Bond. 4. Scanning electron microscope photograph revealed that tile interdendritic eutectic was removed in electrolytically etched metal surfaces hilt even dendritic arm was removed in Chemically etched metal surfaces. 5. The metal surfaces which were air-abraded with $50{\mu}m$ aluminum oxide showed roughness and small crack on scanning electron microscope photograph.

2006년 한국경제 전망

박상원,Park, Sang-Won 한국인삼전략화협의회 2006 인삼·약초 Vol.4 No.1

정부의 양극화 해소방안에 대하여

박상원,Park, Sang-Won 한국인삼전략화협의회 2006 인삼·약초 Vol.4 No.2