In the process of turning, pointing at the uncertain phenomenon of cutting which is caused by the disturbance of random factors, for determining the uncertain scope of cutting force, the integrated symmetric fuzzy number and the finite element method (FEM) are used in the prediction of cutting force. The method used symmetric fuzzy number to establish fuzzy function between cutting force and th...

This study demonstrated the effectiveness of finite element method in predicting cutting temperature carbide inserted tool. A three-factor Box-Behnken design, making seventeen tests a cylindrical mild steel bar with 200 mm length by von mises diameter was employed to numerical and experimental predictions. The data obtained from tool compared statistically analyzed using reliability plots. On c...

Georges Bank is a large, shallow feature separating the Gulf of Maine from the Atlantic Ocean. Previous studies demonstrated a strong tidal-mixing front during the warm season on the northern bank margin between thermally stratified water in the Gulf of Maine and mixed water on the bank. Tides transport warm water off the bank during flood tide and cool gulf water onto the bank during ebb tide....

BACKGROUND We recently demonstrated the first in-vitro cutting results of a minimal-invasive aortic valve resection tool. The current study was designed to assess the cutting accuracy of this new device improved by the implementation of a linear motor-based propulsion unit. METHODS Native aortic valves of isolated swine hearts (valve diameter 17.8+/-0.9 mm, mean+/-S.D.) were artificially sten...

Soil temperature influences crop growth and quality under field and greenhouse conditions; however, precise investigation using controlled cultivation systems is largely lacking. We investigated effects of root-zone temperatures on growth and components of hydroponically grown red leaf lettuce (Lactuca sativa L. cv. Red Wave) under a controlled cultivation system at 20 ̊C. Compared with ambient ...

Based on analytical and experimental test methods, an evaluation of coated tools efficiency in milling Ti6Al4V with coated cemented carbide inserts is introduced. The stress-strain curves and the fatigue critical loads of the investigated coating were determined at various temperatures by nanoindentations and impact tests respectively, employing FEM-supported algorithms for results evaluation. ...

1. Grasslands in the Temperate Zone: Distribution and History 2. Characteristics of Old Temperate Grassland Ecosystems 2.1 Grazing and Cutting Regimes 2.2 Nutrients 2.3 Area Size and Networks 2.4 Dynamic Land Use 2.5 Species Richness/Biodiversity 3. Present and Future Policy to Manage Old Temperate Grasslands 3.1 Modern Agriculture and Traditional Temperate Grasslands 3.2 Avoidance of Eutrophic...