‘Noble Wine’ 품종은 경남농업기술원 화훼연구소에서 백색 홑꽃인 ‘SL03-01’을 모본, 복색 홑꽃인 ‘Artist Pink’ 를 부본으로 인공교배를 실시하여 2003년에서 2007년에 걸쳐서 파종과 계통선발을 통해 육성하였다. 품종의 특 성검정은 2005년부터 2007년까지 봄 촉성재배와 가을 억제재배 조건아래서 3회에 걸쳐 조사하였다. ‘Noble Wine’ 품종의 자연개화기는 10월26일경이며, 일장조절 에 의해 주년재배가 가능하다. 꽃 크기가 5.4 cm인 소 륜으로 꽃 하나의 꽃잎수가 21.6개정도이고 착화수도 28.5개로 많은 편이다. 화색은 복색(백색/적색)이며, 녹 색화심을 가졌다. 봄의 단일상태에서 ‘Noble Wine’ 품종의 개화소요일수는 45일 정도이며, 가을 절화수명은 21.3일로 나타났다.

This paper proposes a tuned liquid column sloshing damper(TICSD) and its optimal design to mitigate bidirectional responses of building structures. The proposed damper acts as a liquid column vibration absorber (LCVA) and a tuned sloshing damper(TSD), respectively, in both principal axes of building structures. Optimum designs of the TLCSD addresses the minimizing in terms of live load, area and volume due to its installation, comparing to each installation with two dampers in two principal directions, respectively. Numerical results from optimum designs shows that the control robustness due to changes in the effective column length and the effective mass of the TLCSD superiors to that uses the head loss coefficient and damping nets in an existing liquid column vibration absorber(LCVA) and TSD. The TLCSD is designed according to the similarity laws of 76 story benchmark building model. Numerical model of the proposed TLCSD is derived based on the experimentally obtained transfer functions according to rotational angles.

For the fabrication of core-shell structure bimetallic lead-free solder balls, both the critical temperature (Tcr) for the phase separation of two immiscible liquid phases and the temperature coefficient of the interfacial tension between the two separated liquid phases are required. In order to obtain this information, the temperature dependence of the surface tension of 60%Bi-24%Cu-16%Sn(-REM) alloys was measured using the constrained drop method. The slope of the temperature dependence of the surface tension changed clearly at a critical temperature for the separation of two immiscible liquid phases. The critical temperature of the 60%Bi-24%Cu-16%Sn alloy was estimated to be 1097K. An addition of 0.05% Ce decreased the critical temperature to 1085K, whereas that of 0.05% La increased it to 1117K. It was found that the surface tension and its temperature coefficient of the 60%Bi-24%Cu-16%Sn alloy were slightly increased by the addition of 0.05% Ce and 0.05% La. In addition, additions of Ce and La increased the temperature coefficient of the interfacial tension.

This study investigates Bi2O3-B2O3-BaO-ZnO glass with variations of the Co3O4 content (0.25,0.5,1,and 2wt%) and the interaction between transparent dielectric and Ag electrodes heat-treated at 500-560oC for30min. The glass transition temperature, softening temperature and thermal expansion coefficient were432oC, 460oC and 81.4×10-7/oC, respectively. The transmittance of 0.25wt% Co3O4 to which dielectric wasadded was highest and was decreased due to coloration with the addition of more than 0.25wt%. However,without Co3O4, the transmittance of the transparent layer was decreased due to the formation of Ba5Bi3;however, the occurrence of the crystal phase decreased as a result of the addition of Co3O4. The amount ofCo2+ ions increased as the Co3O4 increased. With a maximum of Co3+ ions, the highest transmittance wasobserved.

본 연구에서는 동조질량감쇠기(TMD)와 동조액체 기둥감쇠기(TLCD)로 구성된 2방향 감쇠기의 제어성능을 실험적으로 검증하였다. 본 연구에 사용된 감쇠기는 한방향으로는 TMD로 거동하고, 다른 직교하는 방향에서는 TLCD로 거동하여 제어력이 발생하는 감쇠기이다. 우선, 제작된 감쇠기의 동적특성과 TMD와 TLCD에 의해 발생하는 제어력들의 연계효과를 조사하기 위한 진동대 실험을 수행하였다. 다음으로 이러한 실험결과를 바탕으로 감쇠기의 동적특성에 영향을 미치는 파라미터를 정량적으로 평가하였다. 본 연구에서 사용된 감쇠기가 입사각을 갖는 진동에 의해 가진될 때 TMD와 TLCD에 의해 연계된 제어력이 발생하는 것을 진동대 실험결과로부터 확인하였다. 또한, 감쇠기가 건축물의 2방향 응답제어에도 효과적으로 사용될 수 있음을 확인하였다.

The present study focused on the synthesis of a bismuth-antimony-tellurium-based thermoelectric nanopowders using plasma arc discharge process. The chemical composition, phase structure, particle size of the synthesized powders under various synthesis conditions were analyzed using XRF, XRD and SEM. The powders as synthesized were sintered by the plasma activated sintering. The thermoelectric properties of sintered body were analyzed by measuring Seebeck coefficient, specific electric resistivity and thermal conductivity. The chemical composition of the synthesized Bi-Sb-Te-based powders approached that of the raw material with an increasing DC current of the are plasma. The synthesized Bi-Sb-Te-based powder consist of a mixed phase structure of the , and phases. This powder has homogeneous mixing state of two different particles in an average particle size; about 100nm and about 500nm. The figure of merit of the sintered body of the synthesized 18.75 wt.%Bi-24.68 wt.%Sb-56.57 wt.%Te nanopowder showed higher value than one of the sintered body of the mechanically milled 12.64 wt.%Bi-29.47 wt.%Sb-57.89 wt.%Te powder.

Trace analysis of Cd and Pb at surface modified thick film graphite electrode with Bi nanopowder has been carried out using square-wave anodic stripping voltammetry (SWASV) technique. Bi nanopowder synthesized by gas condensation (GC) method showed the size of nm with BET surface area, . For a strong adhesion of the Bi nanopowder onto the screen printed carbon paste electrode, nafion solution was added into Bi-containing suspension. From the SWASV, it was found that the Bi nanopowder electrode exhibited a well-defined responses relating to the oxidations of Cd and Pb. The current peak intensity increased with increasing concentration of Cd and Pb. From the linear relationship between Cd/Pb concentrations and peak current, the sensitivity of the Bi nanopowder electrode was quantitatively estimated. The detection limit of the electrode was estimated to be and for Cd and Pb, respectively, on the basis of the signal-to-noise characteristics (S/N=3) of the response for the solution under a 10 min accumulation.

Positive temperature coefficient of resistivity (PTCR) characteristics of (1-x)BaTiO3-x(Bi0.5K0.5)TiO3ceramics doped with Nb2O5 were investigated in order to develop the Pb-free PTC thermistor available at hightemperatures of >120oC. The PTCR characteristics appearing in the (Bi0.5Ki0.5)TiO3 (<5mol%) incorporatedBaTiO3 ceramics, which might be mainly due to Bi+3 ions substituting for Ba+2 sites. The 0.99BaTiO3-0.01(Bi0.5K0.5)TiO3 ceramics showed good PTCR characteristics of a low resistivity at room temperature (ρr) of31 Ω·cm, a high ρmax/ρmin ratio of 5.38×103, and a high resistivity temperature factor (α) of 17.8%/oC. Theaddition of Nb2O5 to 0.99BaTiO3-0.01(Bi0.5K0.5)TiO3 ceramics further improved the PTCR characteristics.Especially, 0.025mol% Nb2O5 doped 0.99BaTiO3-0.01(Bi0.5K0.5)TiO3 ceramics exhibited a significantly increasedρmax/ρmin ratio of 8.7×103 and a high α of 18.6%/oC, along with a high Tc of 148oC despite a slightly increasedρr of 39 Ω·cm.

  본 논문은 존 조정하에서의 자동반송차량 네트워크에서 발생하는 고착을 해결하기 위한 두가지 효과적인 알고리듬을 소개한다. 이 알고리듬들은 특별히 양방향 네트워크에 알맞도록 고안되었다. 사이클 제거 알고리듬은 고착을 예방하기 위한 차량의 안전한 라우트를 결정하나, 그래프 축소 알고리듬은 고착을 회피하기 위하여 미래 잠재적인 고착 발생 조건을 결정한다. 시뮬레이션을 통하여 알고리듬들의 성능을 비교 분석한 결과 작업물의 이동 횟수와 알고리듬의 시간 복잡성

본 연구는 계면경계에서 특이성을 갖는 이종재료 열전달문제를 효율적으로 해석할 수 있는 이동최소제곱 유한차분법을 제시한다 이동최소제곱 유한차분법은 격자망(grid)없이 절점만으로 이동최소제곱법을 이용하여 Taylor 다항식을 구성하고 차분식을 만들어 미분방정식을 직접 푼다. 초평면함수 개념에 근거한 쐐기함수를 이동최소제곱 센스(sense)로 근사식에 매입하여 쐐기거동과 미분 점프에 따른 계면경계 특성을 효과적으로 묘사하고 고속으로 미분을 근사하는 이동최소제곱 유한차분법의 강점을 발휘하도록 했다. 서로 다른 열전달계수를 갖는 이종재료 열전도문제 해석을 통해 이동최소제곱 유한차분법이 계면경계문제에서도 뛰어난 계산효율성과 해의 정확성을 확보할 수 있음을 보였다.

The bi-materials with Al-Mg alloy and its composites reinforced with SiC and particles were prepared by conventional powder metallurgy method. The A1-5 wt%Mg and composite mixtures were compacted under , and then the mixtures compacted under 400 MPa were sintered at for 5h. The obtained bi-materials with Al-Mg/SiCp composite showed the higher relative density than those with composite after compaction and sintering. Based on the results, the bi-materials compacted under 400 MPa and sintered at 873K for 5h were used for mechanical tests. In the composite side of bi-materials, the SiC particles were densely distributed compared to the particles. The bi-materials with Al-Mg/SiC composite showed the higher micro-hardness than those with composite. The mechanical properties were evaluated by the compressive test. The bi-materials revealed almost the same value of 0.2% proof stress with Al-Mg alloy. Their compressive strength was lower than that of Al-Mg alloy. Moreover, impact absorbed energy of bi-materials was smaller than that of composite. However, the bi-materials with Al-Mg/SiCp composite particularly showed almost similar impact absorbed energy to composite. From the observation of microstructure, it was deduced that the bi-materials was preferentially fractured through micro-interface between matrix and composite in the vicinity of macro-interface.

The present study is to analyze the thermoelectric properties of thermoelectric materials fabricated by the mechanical grinding process. The powders were prepared by the combination of mechanical milling and reduction treating methods using simply crushed pre-alloyed powder. The mechanical milling was carried out using the tumbler-ball mill and planetary ball mill. The tumbler-ball milling had an effect on the carrier mobility rather than the carrier concentration, whereas, the latter on the carrier concentration. The specific electric resistivity and Seebeck coefficient decreased with increasing the reduction-heat-treatment time. The thermal conductivity continuously increased with increasing the reduction-heat-treatment time. The figure of merit of the sintered body prepared by the mechanical grinding process showed higher value than one of the sintered body of the simply crushed powder.

In order to investigate 95% retained critical current of Bi-2223/Ag tapes under various stress-strain conditions, load cell attached tension and bending apparatus was used. The critical current of stress-strained tape was degraded below 95% retained critical current when tension and bending was simultaneously applied together. But only one of this tension or bending did not degrade the tape below 95% retained critical current. Deformation temperature was important to maintain the 95% retained Ic of Bi-2223/Ag tapes after bending or tension deformation because mechanical strength of tapes can be changed drastically between room temperature and 77 K.

We fabricated Bi-2212/ composite superconductors and evaluated the effects of the powder mixing method and melting temperature on their microstructure and superconducting properties. The Bi-2212 powders were mixed with by hand-mixing (HM) and planetary ball milling (PBM) and then the powder mixtures were melted at , solidified, and annealed. We found that the powder mixture prepared by PBM was finer and more homogeneously mixed than that prepared by HM, resulting in more homogeneous microstructure and smaller and second phases after annealing.

Five kinds of double stacked 385 (55 x7) filamentary Bi2212/Ag round wires and 55 filamentary tapes with different Ag ratios (silver area/superconductor area) have been fabricated via PIT method, and the effects of Ag ratio and processing factors on critical current density were studied. The effects of the maximum temperature and average filament diameter on critical current density were also studied. The wire of 0.74 mm diameter having Ag ratio 3.7 showed critical current density of at 4.2 K, 0 T.