Comparison of Best Economy and Best Power Mixture Settings in the Purdue University Training Fleet Revisited

Best economy (lean of peak or LOP) operation of aircraft engines rather than best power (rich of peak or ROP) has been suggested as a means to reduce fuel consumption in light aircraft with modest speed reduction leading to reduced operating cost (increased miles per gallon), and to reduce cylinder head temperatures (CHTs) leading to improved engine longevity and reduced maintenance cost. A recent study by Chrisman (2011) using a limited number of data sets from aircraft in the Purdue University fleet of Cirrus SR20 training aircraft demonstrated statistically significant reduced fuel consumption and reduced CHT but no statistically definite speed reduction. This study confirms the earlier results for fuel consumption and CHTs using expanded data sets. It suggests that the failure to derive a statistically significant reduction in speed is a consequence of inherent experimental limitations rather than the lack of any reduction

Use of DDT with "interrupts-on" programs

http://deepblue.lib.umich.edu/bitstream/2027.42/3805/5/bab5989.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/3805/4/bab5989.0001.001.tx

A programming system for the simulation of cellular spaces

http://deepblue.lib.umich.edu/bitstream/2027.42/3803/5/bab3965.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/3803/4/bab3965.0001.001.tx

The CESSL programming language

http://deepblue.lib.umich.edu/bitstream/2027.42/4949/5/bac2483.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/4949/4/bac2483.0001.001.tx

Flexible, high-speed interface between IBM 1800 and DEC PDP-7 computers

http://deepblue.lib.umich.edu/bitstream/2027.42/3802/5/bab3964.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/3802/4/bab3964.0001.001.tx

Debugging Optimized Code: Concepts and Implementation on DIGITAL Alpha Systems

Effective user debugging of optimized code has been a topic of theoretical and practical interest in the software development community for almost two decades, yet today the state of the art is still highly uneven. We present a brief survey of the literature and current practice that leads to the identification of three aspects of debugging optimized code that seem to be critical as well as tractable without extraordinary efforts. These aspects are (1) split lifetime support for variables whose allocation varies within a program combined with definition point reporting for currency determination, (2) stepping and setting breakpoints based on a semantic event characterization of program behavior, and (3) treatment of inlined routine calls in a manner that makes inlining largely transparent. We describe the realization of these capabilities as part of Compaq’s GEM back-end compiler technology and the debugging component of the OpenVMS Alpha operating system

DEC PDP-7/IBM 1800 high speed interface reference manual

http://deepblue.lib.umich.edu/bitstream/2027.42/4948/5/bac2453.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/4948/4/bac2453.0001.001.tx

Specialized system software for interacting DEC PDP-7 and IBM 1800 computers

http://deepblue.lib.umich.edu/bitstream/2027.42/3804/5/bab3982.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/3804/4/bab3982.0001.001.tx