For a particle moving on half-line or in an interval the operator $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{p}=\ensuremath{-}i{\ensuremath{\partial}}_{x}$ is not self-adjoint and thus does qualify as physical momentum. Consequently canonical quantization based \^{}\fi{}}{p}$ fails. Based upon alternative concept for momentum ${\stackrel{\ifmmode \^{}\fi{}}{p}}_{R}$, we show that can indeed be ...

Th e fi nancial regulation architecture in both the United States and China developed during eras when retail deposits and bank loans were the primary mode of fi nancial intermediation. Th e function of banks is to transform short-term deposits into long-term loans, while providing liquidity for depositors. Experience has taught regulators hard lessons that this activity must be subject to prud...

a Department of Sociology and Social Science Research Center, Mississippi State University, PO Box C, Mississippi State, MS 39762, USA b Social Science Research Center, Mississippi State University, PO Box 5287, Mississippi State, MS 39762, USA c Department of Civil and Building Engineering, Loughborough University, Leicestershire LE11 3TU, United Kingdom d Department of Sociology, Mississippi ...

Spin is the only internal degree of freedom of an electron, and that raises two interesting, closely related questions. First, what kind of new physics emerges when the processes traditionally attributed separately to electron charge and electron spin become closely interconnected? And second, to what sort of new electronic devices might this physics lead us? Success in applications has the pot...

Superinfection immunity is found in the conjugal transfer of R factors between two fi(+) R factors and between two fi(-) R factors (fi = fertility inhibition), as we reported previously. In contrast, no reduction in the frequencies of transduction of an fi(+) R factor 222 was caused by the presence of fi(+) R factors in the recipients in transduction systems with phage P1kc in Escherichia coli ...

BACKGROUND Uncomplicated frailty instruments are desirable for use in a busy clinical setting. The aim of this study was to operationalize a frailty index (FI) from routine blood and urine tests, and to evaluate the properties of this FI compared to other frailty instruments. MATERIALS AND METHODS We conducted a secondary analysis of a prospective cohort study on 306 patients aged ≥65 years h...

background: apical leakage assessment is a way to compare the effi ciency of a fi lling material to seal the apical region of the tooth. many microleakage testing techniques have been introduced through the years, but there has been no agreement as to which technique gives the most accurate results. the aim of this study was to compare the accuracy of fl uid fi ltration and bacterial leakage te...