Nondestructive test determines overload destruction characteristics of current limiter fuses

Nondestructive test predicts the time required for current limiters to blow /open the circuit/ when subjected to a given overload. The test method is based on an empirical relationship between the voltage rise across a current limiter for a fixed time interval and the time to blow

Statistical Uncertainties in Temperature Diagnostics for Hot Coronal Plasma Using the ASCA SIS

Statistical uncertainties in determining the temperatures of hot (0.5 keV to 10 keV) coronal plasmas are investigated. The statistical precision of various spectral temperature diagnostics is established by analyzing synthetic ASCA Solid-state Imaging Spectrometer (SIS) CCD spectra. The diagnostics considered are the ratio of hydrogen-like to helium-like line complexes of $Z\ge14$ elements, line-free portions of the continuum, and the entire spectrum. While fits to the entire spectrum yield the highest statistical precision, it is argued that fits to the line-free continuum are less susceptible to atomic data uncertainties but lead to a modest increase in statistical uncertainty over full spectral fits. Temperatures deduced from line ratios can have similar accuracy but only over a narrow range of temperatures. Convenient estimates of statistical accuracies for the various temperature diagnostics are provided which may be used in planning ASCA SIS observations.Comment: postscript file of 8 pages+3 figures; 4 files tarred, compressed and uuencoded. To appear in the Astrophysical Journal Letters; contents copyright 1994 American Astronomical Societ

The Impact Of CMO Tenure On Brand Equity And Cost Of Capital: Insights From Business To Consumer Industries

This paper investigates the relationship between CMO tenure and firm risk as measured by cost of capital. The author develops a conceptual model linking the direct impact of CMO tenure on the firm’s cost of capital and indirect impact through brand equity. The hypotheses are tested using data on 125 public US-based firms between 2004 and 2013. The findings suggest that longer CMO tenure results in higher brand equity. Further, longer CMO tenure reduces cost of capital through its impact on brand equity. The author also finds that the impact of CMO tenure on brand equity is strengthened when the CEO has prior marketing experience as well as when the CEO and CMO have same-firm prior experience. However, the impact is weaker when the CEO has greater general ability (i.e., generalist). Post-hoc analyses reveals that CMO tenure has economically meaningful impact on cost of capital by releasing extra working capital for investment outside. The findings imply that a revolving CMO door is costly for the firm