Middle Mississippian carbonates of the Illinois Basin : a seminar and core workshop, April 23rd and 24th, 1981, Mt. Vernon, Illinois

co-sponsored by the Illinois Geological Society and the Illinois State Geological SurveyOpe

Geologic notes

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A fast and low-power microelectromechanical system-based non-volatile memory device

Several new generation memory devices have been developed to overcome the low performance of conventional silicon-based flash memory. In this study, we demonstrate a novel non-volatile memory design based on the electromechanical motion of a cantilever to provide fast charging and discharging of a floating-gate electrode. The operation is demonstrated by using an electromechanical metal cantilever to charge a floating gate that controls the charge transport through a carbon nanotube field-effect transistor. The set and reset currents are unchanged after more than 11 h constant operation. Over 500 repeated programming and erasing cycles were demonstrated under atmospheric conditions at room temperature without degradation. Multinary bit programming can be achieved by varying the voltage on the cantilever. The operation speed of the device is faster than a conventional flash memory and the power consumption is lower than other memory devices

The New Albany Shale Group of Illinois

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Continuing to Explore the Relation between Economic and Political Factors and Government Survey Refusal Rates: 1960–2015

In the United States, government surveys’ refusal rates have been increasing at an alarming rate, despite traditional measures for mitigating nonresponse. Given this phenomenon, now is a good time to revisit the work of Harris-Kojetin and Tucker (1999). In that study, the authors explored the relation between economic and political conditions on Current Population Survey (CPS) refusal rates over the period 1960–1988