본 연구는 딸기의 2단 고설베드재배가 끝난 여름철 동안 수박재배 시, 베드 위치와 재식밀도가 수박의 과실 품질에 미치는 영향을 구명하고자 하였다. 고설 베드상자는 길이 102cm, 폭 22cm, 높이 13cm의 규격이고, 배지는 코코피트(coir)를 사용하였다. 수박은 베드 위치 및 재식밀도에 따라 베드상단 1주(A), 베드 상하단 각 1주로 상단(B) 및 하단(C), 상하단 각2주로 상단 2주(D), 하단 2주(E)로 정식 처리하였다. 수박은 2012년 5월 8일에 2단 고설베드에 정식하여 양액과 점적관수로 재배하였고 7월 25일에 수확되었다. 수박의 품질을 비교하고자, 과실 무게와 크기를 조사하였고, 과육 내 비타민 C, 플라보노이드, 페놀화합물, 당도 및 산도 등의 기능성 화합물을 분석하였다. 과실의 외관 품질인 과고, 과폭 및 과중은 A처리가 다른 처리에 비하여 가장 높았다. 특히 과중은 A, B, C, D, E처리 순으로 무거웠다. 식물체의 초장이나 엽수는 유의적 차이가 없었으나 줄기 직경과 엽면적은 A처리가 유의하게 컸다. 수박 과육 내플라보노이드, 항산화 활성 및 산도는 처리 간에 유의적 차이가 없었다. 한편 당도는 A, B 및 D 처리에서 유의하게 높게 나타났다. 또한 페놀화합물 함량은 A처리가 가장 높았다. 이상의 결과로 보아 대과의 수박 생산을 위해서는 A처리, 소과의 수박 생산에는 D와 E의 처리가 유리할 것으로 판단되었다.

Recently, metal molding has become essential not only for automobile parts, but also mass production, and has greatly influenced production costs as well as the quality of products. Its surface has been treated by carburizing, nitriding and induction hardening, but these existing treatments cause considerable deformation and increase the expense of postprocessing after treatment; furthermore, these treatments cannot be easily applied to parts that requiring the hardening of only a certain section. This is because the treatment cannot heat the material homogeneously, nor can it heat all of it. Laser surface treatment was developed to overcome these disadvantages, and, when the laser beam is irradiated on the surface and laser speed is appropriate, the laser focal position is rapidly heated and the thermal energy of surface penetrates the material after irradiation, finally imbuing it with a new mechanical characteristic by the process of self-quenching. This research estimates the material characteristic after efficient and functional surface treatment using HPDL, which is more efficient than the existing CW Nd:YAG laser heat source. To estimate this, microstructural changes and hardness characteristics of three parts (the surface treatment part, heat affect zone, and parental material) are observed with the change of laser beam speed and surface temperature. Moreover, the depth of the hardened area is observed with the change of the laser beam speed and temperature.

Analyzing results of exhaust gas of solid fuel burning are investigated with measuring position in a pilot scale MILD(Moderate and Intense Low oxygen Dilution) combustor using high temperature exhaust gas recirculation. Flue gas hasbeen measured at exit of combustion chamber and stack, especially. Oxygen concentration measured at stack is higherand carbon dioxide concentration is lower than that measured at exit of combustion chamber, because air flows into theflue gas from the post-treatment facilities, such as gas cooler and bag filter, due to negative pressure caused by inducedblower. Low carbon dioxide concentration can cause an error which estimates higher air ratio than actual air flow rateneeded for complete combustion. Average calculated concentration of measured nitric oxide and carbon monoxide forreference concentration of 6% oxygen have no notable difference with measuring position. But, time resolution of thedata measured at exit of combustion chamber is better than that measured at stack. It is confirmed that MILD combustionof solid fuel of pulverized coal using high temperature exhaust gas recirculation can reduce dramatically nitric oxideemission.

In this paper, the equations calculating GDOP are induced in Hyperboic, and Spherical Navigation System, respectively, The GDOP diagram shows that the DGOP in the inner region of Beacons is similar each other, but the GDOP of Hyperboic Navigation System is much larger than that of Spherical Navigation System due to GDOP in the outer region of Beacons. The authors propose the algorithm estimating the pulse starting time using the Hyperboic Navigation System, and prove that if Navigation use the Spherical Navigation System by adopting the proposed Algorithm -in this case, "Pseudo Sperical Navigation System" - in the outer region where GDOP is becoming large, the position errors can be reduced.e reduced.