In this paper, experimental results of a deep drawing process to produce a cylinder of high strength steel with a spherical head were compared with it’s simulation results and three proposal design types. Meanwhile, the amount of limiting draw ratio in some stages was determined. Accuracy and precision of the results of a finite element software to predicting the multi stage deep drawing proces...

output characteristics of fuel cells are affected by a large number of parameters such as geometry, dimensions, construction materials and conditions of supplying fluids. in this paper a mathematical model followed by a two-dimensional numerical approach has been presented to study the fuel cell parametrically. effect of oxygen concentration at gas diffusion layer entrance, temperature and pres...

BACKGROUND Ginseng is a semishade perennial plant cultivated in sloping, sun-shaded areas in Korea. Recently, owing to air-environmental stress and various fungal diseases, greenhouse cultivation has been suggested as an alternative. However, the optimal light transmission rate (LTR) in the greenhouse has not been established. METHODS The effect of LTR on photosynthesis rate, growth, and gins...

SensorCraft is an intelligence, surveillance, and reconnaissance (ISR) system that integrates unmanned flight platforms airborne antenna arrays. Under gust loads, the high–aspect–ratio, light–wing structure of has considerable bending torsion deformation, affecting performance leading to loss arrays’ electromagnetic performance. Taking as background, a wing conformal array was designed, aircraf...

High strength steel is widely used in engineering, especially light structures. However, due to the material properties of high steel, its seismic performance has attracted wide attention. To study hysteretic behavior H-shaped members thin-walled sections Q690 a finite element model was built up by using general analysis software ABAQUS. Based on model, an extensive parametric carried out. The ...

It has previously been shown by our laboratory that OTK18, a human immunodeficiency virus (HIV)-inducible zinc-finger protein, reduces progeny-virion production in infected human macrophages. OTK18 antiviral activity is mediated through suppression of Tat-induced HIV-1 long terminal repeat (LTR) promoter activity. Through the use of LTR-scanning mutant vectors, the specific regions responsible ...