User's manual for UCAP: Unified Counter-Rotation Aero-Acoustics Program

This is the user's manual for the Unified Counter-rotation Aeroacoustics Program (UCAP), the counter-rotation derivative of the UAAP (Unified Aero-Acoustic Program). The purpose of this program is to predict steady and unsteady air loading on the blades and the noise produced by a counter-rotation Prop-Fan. The aerodynamic method is based on linear potential theory with corrections for nonlinearity associated with axial flux induction, vortex lift on the blades, and rotor-to-rotor interference. The theory for acoustics and the theory for individual blade loading and wakes are derived in Unified Aeroacoustics Analysis for High Speed Turboprop Aerodynamics and Noise, Volume 1 (NASA CR-4329). This user's manual also includes a brief explanation of the theory used for the modelling of counter-rotation

Pearl Harbor: Did FDR Know?

At precisely 7:55 a.m., Sunday, December 7, 1941, the Japanese launched a devastating air attack on Hawaii, leaving 2403 Americans dead, eight battleships crippled or destroyed, and 188 planes demolished. “The worse disaster in the military annals of the United States,” in the words of a noted historian, plunged America into a global war and permanently changed the country. Isolationism was dead. Americans were united to win the war, and they were resolved never again to be caught by surprise. At the same time, they wanted to know why the Army and Navy were caught napping. Thus began a years-long search for scapegoats, a search which would lead to much confusion, bitter controversy, and the sensational charge that President Franklin Roosevelt had prior knowledge of the Japanese attack

Adequacy of the Kankakee River as a Drinking Water Source

Author Keywords: Exceptional quality, Increasing in flow, Cleanest river in MidWes

Maternal fluoxetine exposure alters cortical hemodynamic and calcium response of offspring to somatosensory stimuli

Epidemiological studies have found an increased incidence of neurodevelopmental disorders in populations prenatally exposed to selective serotonin reuptake inhibitors (SSRIs). Optical imaging provides a minimally invasive way to determine if perinatal SSRI exposure has long-term effects on cortical function. Herein we probed the functional neuroimaging effects of perinatal SSRI exposure in a fluoxetine (FLX)-exposed mouse model. While resting-state homotopic contralateral functional connectivity was unperturbed, the evoked cortical response to forepaw stimulation was altered in FLX mice. The stimulated cortex showed decreased activity for FLX versus controls, by both hemodynamic responses [oxyhemoglobin (Hb