Effective model of the electronic Griffiths phase

We present simple analytical arguments explaining the universal emergence of electronic Griffiths phases as precursors of disorder-driven metal-insulator transitions in correlated electronic systems. A simple effective model is constructed and solved within Dynamical Mean Field Theory. It is shown to capture all the qualitative and even quantitative aspects of such Griffiths phases.Comment: 9 pages, 7 figures, one reference corrected; minor corrections include

Simple qualitative tests for rifampicin in urine

Simple qualitative tests for rifampicin in urine, involving extraction with chloroform as well as with benzene were investigated on 50 patients. A positive test result was obtained in 98-100% of the specimens between 3 and 11 hours after drug administration by both methods. All specimens collected prior to administration of rifampicin as also specimens collected after ingestion of other anti-tuberculosis drugs were negative by both methods. However, the chloroform extraction method yielded positive reactions in 26% of 27 specimens collected after the administration of c l o f a z i m i n e

Simple but effective criteria:rethinking excellent qualitative research

Despite unremitting efforts to develop quality criteria of qualitative research, traditional criteria for the trustworthiness of qualitative results are still predominant in interpretive and naturalistic inquiries including Ph.D. studies. This work does not aim to replace the existing quality criteria but rather to update and simplify those criteria to include credibility, confirmability, and representativeness. The purpose of the study is to offer a review of existing criteria and strategies for qualitative research and to suggest simple criteria and strategies that will win the confidence of the academic community and augment the trustworthiness of qualitative research