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Abstract

Three tests were made on the kerosene sample: (a) determining hydrogen content by Nuclear Magnetic Resonance [NMR], (b) determination of viscosity by U-tube viscometer, and (c) flash point determination by Pensky-Marten closed-cup tester. Results suggest that the kerosene sample has 13.73% hydrogen content, 7.706 mm2/s kinematic viscosity at -20°C (extrapolated using Sutherland Viscosity Law), and 52-53°C flash point. These parameters characterized the kerosene sample as aviation fuel in terms of heating value, degree of saturation, pressure drop in fuel lines, pumping characteristics and safe handling. All parameters passed the standards derived from aviation literature. These parameters could Continue reading...

Microsoft Windows Access Control

Appropriate Microsoft Windows access controls

The access control of Windows is complex associated with various permission grants. The system assumes that the installation of applications is under Program Files that has a safe default set of permissions. Any application installed in a non-default location goes to C folder. The user can modify the settings to have a Collaborative Access Control List. An administrator should have two accounts one for regular work, and another for administrative work (Homer & Isbell, 2004). The administrator should create user accounts using malware and least privilege where users do not have administrative permissions. An administrator should Continue reading...