• 전기전자학회논문지
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• 제16권1호
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• pp.51-55
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• 2012

본 논문에서는 순환천이변조 (CCSK: cyclic code shift keying) 시퀀스로 삼진 시퀀스를 적용하는 것을 제안하였다. 그리고 순환천이변조를 적용한 주파수도약대역확산/시분할다중접속 (FHSS/TDMA: frequency hopping spread spectrum/time division multiple access) 시스템에서 성능을 모의실험 하였다. 실험에서 무선 채널은 레일레이(Rayleigh) 페이딩 채널로 모델링하였다. 모의 실험 결과로부터 순환천이변조 시퀀스로 무작위 시퀀스를 사용한 시스템보다 삼진 시퀀스를 적용한 시스템이 더 높은 성능을 보이는 것이 증명되었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 추계 학술논문 발표대회
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• pp.49-50
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• 2011

This study tried to utilize basic data for developing the cement substitute material through ternary system inorganic composite properties of flowing and strength. W/B and addition ratio of Na2SiO3 have been changed in ternary system inorganic composite combined blast furnace slag, red mud and fly ash. As to the experimental result inorganic composite, the flowing and intensity improvement effect was showed to be bigger than W/B according to the addition ratio change of the Na2SiO3. When particularly the Na2SiO3 addition ratio was 6%, the rapid flowing and strength improvement effect was confirmed.

• Elastomers and Composites
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• 제37권4호
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• pp.211-216
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• 2002

서로 다른 고분자 혼합물의 조성 및 농도에서 온도 변화에 따른 상 분리 거동을 관찰하였다. 용매는 EPDM에 poor solvent로, SBR에는 good solvent로 작용하는 벤젠을 사용하였다. Cloud point curves(CPC)에서 각 고분자 시료에 대한 용매의 친화력과 상호 반발력 차이 때문에 15 ℃를 전후하여 CPC에 큰 변화가 있었다. 5℃ ~ 25℃ 영역에서 고분자 혼합물 조성비와 농도에 따라 비상용성이 나타났으며, 분리된 각 상의 조성은 상분리 온도에 크게 의존되어 있음을 확인하였다. EPDM과 SBR의 상호작용 파라메타는 0.6301 ~ 1.0775의 범위로 이 두 고분자 물질은 상용성이 없는 것으로 결론지었다.

• 열처리공학회지
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• 제10권2호
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• pp.138-149
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• 1997

TiN and AlN are ceramic materials with extensive applications due to its excellent mechanical and chemical properties at elevated temperature. The purpose of this research is to develop the method for the synthesis of ternary nitride powder, titanium-aluminum-nitrogen system, which have an excellent property of both TiN and AlN. The ternary nitride such as $Ti_3AlN$, $Ti_2AlN$ and $Ti_3Al_2N_2$ can be synthesized by the interdiffusion nitriding method in Ar gas, however, the ternary nitride coexist with TiN, AlN, $Ti_3Al$ and ${\alpha}$-Ti. The ternary nitride are stable below $1400^{\circ}C$, but these are gradually decomposed into TiN, $Ti_3Al$ and AlN above $1400^{\circ}C$. The thermal oxidation characteristics of the Ti-Al-N compound synthesized by the interdiffusion nitriding method is superior to that of the TiN+AlN mixed powder, and the oxidation for both materials show the differential behaviors.

• Journal of Pharmaceutical Investigation
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• 제31권1호
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• pp.13-18
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• 2001

This study was to investigate the relationship between the gel layer thickness and swelling boundary via strength measurements using texture analysis. The novel texture analysis approach was used to examine the dynamics of swelling behavior in a ternary polymeric matrix tablet. The method permitted the characterization of the changes occurring at the peripheral as well as within interior boundary of the swelling during water ingress. The increase in gel strength for pectin, HPMC, and a ternary mixture with gelatin was found to depend on polymer concentration. Therefore, this method is further applicable to characterize the swelling behavior and provide opportunity to differentiate the gel-layer from that of swelling boundary.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2015년도 춘계학술대회 논문집
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• pp.106-106
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• 2015

In this study, we investigated electrochemically formed nanotube shape on ternary Ti-25Ta-xHf alloys with Hf contents. Ti-25Ta-xHf (x=0~15 wt.%) alloys were manufactured by vacuum arc-melting furnace. The obtained ingots were homogenized in an argon atmosphere at $1050^{\circ}C$ for 2h and then water quenching. The specimens were cut from ingots to 4 mm thickness and first ground and polished using SiC paper (grades from #100 to #2000). The anodization treatments on Ti-25Nb-xHf alloys were carried out at room temperature for experiments. The formation of nanotubular film was conducted by electrochemical method in mixed electrolytes with 1 M $H_3PO_4$ + 0.8 wt. % NaF at 30 V for 2 h. The morphologies of nanotube depended on the Hf content in Ti-25Ta-xHf ternary system.

• East Asian mathematical journal
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• 제29권3호
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• pp.293-302
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• 2013

We research properties of ternary numbers and hyperholomorphic functions with values in $\mathbb{C}$(2). We represent reduced quaternion numbers and obtain some propertries in dual reduced quaternion systems in view of Clifford analysis. Moreover, we obtain Cauchy theorems with respect to dual reduced quaternions.

• 대한화학회지
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• 제6권2호
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• pp.143-147
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• 1962

As a part of "the Fundamental Study of Pyrometallurgical Debismuthizing of Lead", the author has studied liquid Pb-Bi, Pb-Na, Bi-Na binaries and Pb-Bi-Na ternary including Pb rich side composition which forms a basis of the Dittmer method. In this study, debismuthizing mechanism of the Dittmer method pertaining to the lead rich corner of the system studied was classified by the results of thermal analysis, solubility determination of Bi and Na in liquid Pb and debismuthizing test by adding metallic sodium. For instance eutectic trough in lead rich corner of Pb-Bi-Na ternary relating to the Dittmer method was determined.

• Journal of applied mathematics & informatics
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• 제18권1_2호
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• pp.235-246
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• 2005

We present an interpolating, univariate subdivision scheme which preserves the discrete curvature and tangent direction at each step of subdivision. Since the polygon have a geometric information of some original(in some sense) curve as a discrete curvature, we can expect that the limit curve has the same curvature at each vertex as the control polygon. We estimate the curvature bound of odd vertices and give an error estimate for restoring a curve from sampled vertices on curves.

• 한국세라믹학회지
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• 제20권1호
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• pp.37-42
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• 1983

An attempt was made to derive a possible synthetic mechanism of Fluoro-phlogopite (Mica, 4Mg.$Al_2O_3$.$6SiO_2$.$K_2O$.$2MgF_2$) The pevention of fluorine vaporization turned out to be the key in the synthesis of Mica in question.l Consequently the quinary system of Mica was seperately synthesized ; frist 4MgO.$Al_2O_3-6SiO_2$(ternary system) was sintered at 135$0^{\circ}C$ and $K_2O$ and $MgF_2$ were added and second 4MgO.$Al_2O_3-6SiO_2$.$K_2O$ (quarternary system) was heat-treated at 135$0^{\circ}C$ and $MgF_2$ was added. The ternary system resulted in Proto-enstatite Cordierite and Spinel phases while Forsterite and Leucite were shown in the quarternay system . In both methods Fluoro-phlogopite was systhesized but the solid state reactions to form Mica from the ternary system and the quarternary system were different. High temperature reactions in the formation of Mica were investigated employing XRD, DTA and SEM The study of the synthesis of Mica indirectly suggested a method of phase analysis of quinary system(MgO-$Al_2O_3-SiO_2-K_2O-MgF_2$) and quarternary system(MgO-$Al_2O_3-SiO_2-K_2O-MgF_2$) at various temperatures.