Flight test results for a separate surface stability augmented Beech model 99

A flight evaluation of a Beech model 99 equipped with an attitude command control system incorporating separate surface stability augmentation (SSSA) was conducted to determine whether an attitude command control system could be implemented using separate surface controls, and to determine whether the handling and ride qualities of the aircraft were improved by the SSSA attitude command system. The results of the program revealed that SSSA is a viable approach to implementing attitude command and also that SSSA has the capability of performing less demanding augmentation tasks such as yaw damping, wing leveling, and pitch damping. The program also revealed that attitude command did improve the pilot rating and ride qualities of the airplane while flying an IFR mission in turbulence. Some disadvantages of the system included the necessity of holding aileron force in a banked turn and excessive stiffness in the pitch axis

Alternatives to Oil-Based Binders for Asphalt Concrete Paving in Northern California

Every day, millions of Americans travel along highways and roadways during their everyday lives. Many people do not understand the vital impact that this infrastructure has on their day to day activities and what goes into building these roadways. The traditional process of using paving a roadway requires the use of an asphalt binder that is typically an oil-based binder. With the environmental effects of manufacturing and producing these oils, as well as the effects on the environment when the asphalt is placed, there have been a few accounts of producing an alternative asphalt binder that does not use oil. This paper will examine recent use of alternative asphalt binders in paving projects in Northern California and the effectiveness they have on wear life, sustainability, and constructability. The methodology of this paper is that of an action-based research were a case study of a recent paving project will be examined and then built off of to determine the above listed criteria. The research will later conclude that while studies are still early, the use of alternative binder, particularly those of a plastic base, could in turn replace an oil-based binder in aspects of sustainability, function, and constructability

Flight test evaluation of a separate surface attitude command control system on a Beech 99 airplane

A joint NASA/university/industry program was conducted to flight evaluate a potentially low cost separate surface implementation of attitude command in a Beech 99 airplane. Saturation of the separate surfaces was the primary cause of many problems during development. Six experienced professional pilots who made simulated instrument flight evaluations experienced improvements in airplane handling qualities in the presence of turbulence and a reduction in pilot workload. For ride quality, quantitative data show that the attitude command control system results in all cases of airplane motion being removed from the uncomfortable ride region

Misdiagnosis, Mistreatment, and Harm - When Medical Care Ignores Social Forces.

The Case Studies in Social Medicine demonstrate that when physicians use only biologic or individual behavioral interventions to treat diseases that stem from or are exacerbated by social factors, we risk harming the patients we seek to serve

NASA tungsten reactor radiation chemistry studies Final report

Cadmium sulfate poison control solutions for tungsten water moderated reacto

Vegetative Characteristics of Pronghorn Bed Sites in Wind Cave National Park, South Dakota

Much of the previous literature on pronghorn (Antilocapra americana) fawns has focused on fawn mortality (Beale 1978, Barrett 1984, Gregg et al. 2001) and social behavior (Kitchen 1974, Autenrieth and Fichter 1975, Bromley 1977). Selection of bed sites by pronghorn fawns is a major factor affecting fawn survival (Bromley 1978, Barrett 1981, O\u27Gara et al. 1986, VanSchmus 1990) because adequate cover is a crucial component of fawn bed site selection (Autenrieth 1984). Alldredge et al. (1991) reported that fawns selected dense shrub cover but avoided the most-dense cover in sagebrush-steppe communities in southcentral Wyoming while Tucker and Gamer (1983) noted that height and density of vegetation provided concealment cover to hiding fawns. Canon and Bryant (1997) also found density and height of vegetation to be factors affecting survival of fawns and suggested that increased grass and forb production provided necessary hiding cover for fawns. Bromley (1978) and Smith and Beale (1980) noted that fawns selected bed sites that offered the greatest opportunity for visual detection of predators rather than concealment The pronghorn was reintroduced into Wind Cave National Park, South Dakota, i 1914 and thus, has been maintained within its boundaries for nearly a century However, no information is available on fawning habitat within Wind Cave National Park. The objective of our study was to quantity vegetative characteris tics of fawn bed sites throughout Wind Cave National Park

Vegetative Characteristics of Pronghorn Bed Sites in Wind Cave National Park, South Dakota

Much of the previous literature on pronghorn (Antilocapra americana) fawns has focused on fawn mortality (Beale 1978, Barrett 1984, Gregg et al. 2001) and social behavior (Kitchen 1974, Autenrieth and Fichter 1975, Bromley 1977). Selection of bed sites by pronghorn fawns is a major factor affecting fawn survival (Bromley 1978, Barrett 1981, O\u27Gara et al. 1986, VanSchmus 1990) because adequate cover is a crucial component of fawn bed site selection (Autenrieth 1984). Alldredge et al. (1991) reported that fawns selected dense shrub cover but avoided the most-dense cover in sagebrush-steppe communities in southcentral Wyoming while Tucker and Gamer (1983) noted that height and density of vegetation provided concealment cover to hiding fawns. Canon and Bryant (1997) also found density and height of vegetation to be factors affecting survival of fawns and suggested that increased grass and forb production provided necessary hiding cover for fawns. Bromley (1978) and Smith and Beale (1980) noted that fawns selected bed sites that offered the greatest opportunity for visual detection of predators rather than concealment The pronghorn was reintroduced into Wind Cave National Park, South Dakota, i 1914 and thus, has been maintained within its boundaries for nearly a century However, no information is available on fawning habitat within Wind Cave National Park. The objective of our study was to quantity vegetative characteris tics of fawn bed sites throughout Wind Cave National Park