The Power of the Context

This chapter discusses contextual constraints on brain profiles. The laboratories that measure brain activity contain uncommon combinations of physical features and incentives that prime some brain sites and suppress others. Despite these possibilities, neuroscientists continue to speculate about the implications of the brain patterns they record as if the context has a minimal influence on their observations. This position is difficult to defend given the fact that the parahippocampal cortex binds objects and events to the context in which they appear. Adults lying supine and still in the narrow tube of a magnetic scanner in an unfamiliar room are in an unusual psychological and bodily state. The compromised sense of agency, awareness of being evaluated, confinement in a narrow space, and the demand to suppress all movement affect brain and psychological processes.

Research on Non-Destructive Testing for Defects of Steel Bar in Concrete

Steel bar defect detection in concrete is an important content of civil engineering structure detection. Currently there are no effective methods for nondestructive testing of steel bar defects . This paper studies the application of electromagnetic induction technology for Steel bar defect detection. Firstly, the principle of electromagnetic induction technology to detect rebar are described. Secondly,an air dielectric test device was designed and Steel bar defect in the device was detected by magnetic scanner. Through analyzing we got the characteristics of scanning images from different Steel bar defects. Thirdly this experimental result was compared with detection result in concrete.Finally verify the accuracy and feasibility of this method.