동궁과 월지는 통일신라시대에 조성된 넓은 수면의 원지를 중심으로 한 궁원으로 추정된다. 원지는 입수부, 연못, 출수 부로 구성되어 있으며, 특히 입수부는 독자적인 특징을 보이는 수경시설로 구성되어 있다. 본 연구는 월지 입수부의 수경에 대한 디자인수법을 밝힘으로써 통일신라시대의 궁원을 이해하고 원지조영에 대한 작법의 단초를 제공하고자 한다. 연구방법으로 동궁과 월지에 대한 발굴조사 성과를 바탕으로 발굴조사의 내용과 복원된 수경시설에 대한 조사와 분석 을 통하여 입수부에 대한 수경 디자인수법을 도출한다. 원지의 입수부는 직선형수로, 석조, 소지, 계류형수로, 폭포로 구성되어 다채로운 수경을 연출하고 있는데 각각의 디 자인 수법은 다음과 같다. 기하학적인 인공형태의 직선형수로는 수로의 초입부에서 직각으로 수류방향을 바꾸는 굴절점 을 세 차례 반복하는 선형을 보이는데 이는 건축물의 축선을 따른 것으로 건축물의 세력권에 영향을 받은 형태의 디자인 수법으로 볼 수 있다. 상하로 연결된 2단 석조는 물을 담은 큰 그릇으로써의 이용을 고려한 것으로 상하의 단차에 의한 물의 약동은 시각 및 청각적인 효과를 위한 디자인수법이다. 또한 석조 주위의 판석과 외연벽석으로 형성된 한정된 공간 은 가장 가까이에서 물을 접할 수 있는 친수공간으로 디자인된 수경공간이다. 완만한 곡선의 타원형에 가까운 형태의 소지는 호안의 축조와 바닥처리 및 경석의 배치에 있어서 독자적인 디자인 수법을 보이며, 기능적으로는 폭포수의 일정 한 수량공급을 위한 저수지의 역할을 한다. 자연스러운 분위기를 연출하는 계류형 수로는 직선형 수로와 대비되는 디자 인으로 호안을 축조하는 방식에서 최대한 자연스럽게 보이기 위한 수법을 보여준다. 입수부의 마지막 단계로서 극단적 인 시각적 변화를 보여주는 폭포는 수로와 원지의 단차를 해결하는 디자인수법으로 사용되었으며, 위치설정에 있어서 완전노출을 피하여 흥미를 유발시키는 고차원의 수법이 적용되었다. 다섯 단계로 구성된 다채로운 입수부의 수경시설은 근접한 건축물의 영향을 받는 직선형의 인공적 디자인의 수경수법 에서 시작하여 점차적으로 그 영향에서 벗어나 자연스러움을 보여주는 디자인의 발전단계를 보여주는 수경시설의 디자 인수법을 보여주고 있다.

The present study prepared molybdenum trioxide (MoO3), the most important intermediate of molybdenum metal, by using a fluidized bed reactor for the thermal decomposition of ammonium molybdate (AM) in the presence of an air flow. During the process of fluidizing the sample inside the reactor, the reaction time and temperature were optimized with a close analysis of the X-ray diffraction (XRD) data and with thermogravimetric analysis (TGA). In particular, the temperature level, at which the AM decomposition is completed, is very important as a primary operating parameter. The analysis of the XRD and TGA data showed that the AM decomposition is almost completed at ~350 oC with a reaction time of 30 min. A shorter reaction time of 10 min. required a higher reaction temperature of ~500 oC with the same air flow rate to complete the AM decomposition. A sharp rise in the decomposition efficiency at a temperature ranging between 320 and 350 oC indicated a threshold for the AM decomposition. The operating conditions determined in this study can be used for future scale-ups of the process.

We describe an early angiosperm and a leaf mine ichnofossil from the Lower Cretaceous Potomac Group of Virginia, USA. The descriptions are based on a fossil leaf that was first reported in 1895 but identified as a fragment of a fossil fern. Leaf architectural features and sedimentological context indicate that this leaf was produced by an herbaceous eudicot angiosperm, possibly associated with Ranunculales. The leaf mine is a full depth linear-blotch mine with frass, a trace of puparium inside the blotch mine section, and feeding/oviposition-related puncture marks. The features of the mine are most consistent with those produced by agromyzid flies. This fossil extends the record of agromyzid flies by about 40 million years ago. This fossil provides evidence that agromyzid flies or their ancestors were feeding on herbaceous basal eudicots similar to modern herbaceous ranunculids during the Early Cretaceous, prior to the appearance and diversification of asterids. Our finding contradicts the previous hypotheses on the dipteran radiations associated with the past environmental changes. Insect feeding damages remained in fossilized leaves are currently considered as an important source for climate change studies. We review progresses in the study of the insect feeding trace fossils and their usefulness for monitoring environmental changes.

The most effective way to control plant parasitic nematodes are immersed in hot water, but the larger-scale processing is difficult to adjust a target processing temperature. Thermal equilibrium formula used to fit the processing temperature was very accurate and effective. Use of the thermal equilibrium formula was determined to be well suited on commercial scale(1400L volume chamber) hot water immersion treatment that should be quickly processed. 1000L of water based on 10%(111kg), 12%(136kg), 15%(176kg) filling ratio was applied in 48oC for 30min treatment and only 10%, 12% filling ratio was applied in 49oC for 10min. In 10% filling ratio, thermal equilibrium has been proceeding rapidly in 1-2 min, and no juvenile hatched in all treatments(at 48oC for 30min, at 49oC for 10min). In 12% filling ratio, though thermal equilibrium has been proceeding in 2 min, few juveniles were hatched in boundary temperature at 49.0oC. In 15% filling ratio, it took 7-8 minutes to reach thermal equilibrium after dipping. The result of applying the two treatment conditions(at 48oC for 30min, at 49oC for 10min) to commercial scale field experiment showed nematodes were almost completely eliminated in hooker chive roots. However, some of living nematodes were observed in 15% filling ratio treatment.

Porcine epidemic diarrhea virus (PEDV) causes acute diarrhea and dehydration in pigs with high mortality. PEDV is belong to Coronavirus, enveloped, single-stranded, positive-sense RNA virus. PEDV particles were composed of four structure proteins such as a glycosylated peplomer (spike, S) protein, envelope (E), glycosylated membrane (M) protein, and unglycosylated RNA-binding nucleocapsid (N) protein. Many of previous studies talk about this four structure proteins have a great potential to diagnosis and prevent PEDV. In this study we investigated expression of these structure proteins using the bacterial and baculovirus expression system. In bacterial expression system, our results showed that structure proteins fused polyhedrin and intein gene were expressed higher than non-fusion structure proteins. The expressed fusion proteins were used to immune mice for generating a polyclonal antibodies. In baculovirus expression system, co-infection of insect cells with these four recombinant baculoviruses led to self-assembly of virus-like particles as demonstrated by Transmission electron microscopy. They were confirmed by western blot analysis using pre-made polyclonal antibodies. Finding in this study may provide important information for vaccine and diagnostic development.