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In the in situ leaching process of ionic rare earth ore, high-pressure moving water jet technology has been applied to improve floor leakage problems. However, it found that morphology erosion surface formed by a cannot be accurately predicted. The range an important influence on stability liquid collection engineering and rate resources, which is basis for design engineering. To study this, so...

We hypothesise that all electroweak symmetry breaking terms such as fermion masses and the W and Z gauge boson masses arise radiatively from just one explicit symmetry breaking term in the Lagrangian. Our hypothesis is motivated by the lack of experimental support and the lack of predictivity of the standard symmetry breaking scenario. We construct a simple model which illustrates our ideas. We...

Multicellular animals and plants develop from genetically equivalent cells, yet neighboring cells often adopt different fates. Some well-studied examples are the formation of sensory bristles from a sheet of uniform neuroectodermal cells in Drosophila, and the formation of hair or feathers in the uniform skin ectoderm of vertebrates. This breaking of symmetry within groups of equivalent cells d...

pollution of water and soils by heavy metals is an emerging problem in industrialized countries.the present study was conducted to investigate the heavy metals concentration in water and sedimentsamples from ship breaking sites of sitakunda to assess the potential ecological risk posed by heavy metalusing different methods. heavy metals concentration was analyzed by atomic absorption spectrosco...

This paper focuses on the effect of okra bast fillers biodegradation poly(vinyl alcohol) composites. Fibers were obtained from plant stems via biological degumming and subjected to different chemical treatments such as scouring, alkalizing, maleic anhydride treatment, vinyl acetate grafting. The fibers ground PVA-okra filler composites produced at 20 wt% fiber load solution casting method. test...

Abstract In this paper we have investigated a fuzzy linear programming problem with fuzzy quantities which are LR triangular fuzzy numbers. The given linear programming problem is rearranged according to the satisfactory level of constraints using breaking point method. By considering the constraints, the arranged problem has been investigated for all optimal solutions connected with satisf...