The role of the social worker in the rehabilitation of patients from mental hospitals who have been treated with chlorpromazine.

Thesis (M.S.)--Boston Universit

The role of the social worker in the rehabilitation of patients from mental hospitals who have been treated with chlorpromazine.

Thesis (M.S.)--Boston Universit

Adjustment and Sensitivity Analyses of a Beta Global Rangeland Model

G-Range is a global model that simulates generalized changes in rangelands through time, created with support from the International Livestock Research Institute. Spatial data and a set of parameters that control plant growth and other ecological attributes in landscape units combine with computer code to represent ecological process such as soil nutrient and water dynamics, vegetation growth, fire, and wild and domestic animal offtake. The model is spatial, with areas of the world divided into square cells

HB 2320, Relating to Anguilla - Statement for House Committee on Agriculture Public Hearing - January 31, 1990

150A-

The Marine Stratus/Stratocumulus Experiment (MASE): Aerosol-cloud relationships in marine stratocumulus

The Marine Stratus/Stratocumulus Experiment (MASE) field campaign was undertaken in July 2005 off the coast of Monterey, California to evaluate aerosol-cloud relationships in the climatically important regime of eastern Pacific marine stratocumulus. Aerosol and cloud properties were measured onboard the Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS) Twin Otter aircraft. One cloud that was clearly impacted by ship emissions as well as the ensemble of clouds observed over the entire mission are analyzed in detail. Results at both the individual and ensemble scales clearly confirm the Twomey effect (first indirect effect of aerosols) and demonstrate drizzle suppression at elevated aerosol number concentration. For the ship track impacted cloud, suppressed drizzle in the track led to a larger cloud liquid water path (LWP) at the same cloud thickness, in accord with the so-called second indirect effect. Ensemble averages over all clouds sampled over the entire 13-flight mission show the opposite effect of aerosol number concentration on LWP, presumably the result of other dynamic influences (e.g., updraft velocity and ambient sounding profile). Individual polluted clouds were found to exhibit a narrower cloud drop spectral width in accord with theoretical prediction (M.-L. Lu and J. H. Seinfeld, Effect of aerosol number concentration on cloud droplet dispersion: A large-eddy simulation study and implications for aerosol indirect forcing, Journal of Geophysical Research, 2006). This field experiment demonstrates both the indirect aerosol effect on ship track perturbed clouds, as well as the subtleties involved in extracting these effects over an ensemble of clouds sampled over a 1-month period

Gradients of delay of reinforcement and discriminative stimuli during the delay interval.

Thesis (Ph.D.)--Boston UniversityThis experiment was designed to investigate the relationship of delay interval behavior, food panel pressing, on the performance of an antecedent response, lever pressing. Albino rats were trained in a modified Skinner box with a hinged food cup panel and a removable lever. The delay of reinforcement gradient for lever pressing at 4, 10, 30, and 50 seconds delay was determined under two different delay conditions. In Condition 1, the stimulus conditions, sDl (light on), remained constant throughout the delay interval. Under Condition 11, the stimulus conditions sDl remained constant up to the end of the presented delay interval, and a discrete auditory stimulus, sD2 , signalled the end of this interval. Under both conditions 1 and 11, the presentation of the terminal primary reinforcement was contingent on a panel press response. The animals of both groups were initially trained on a discrimination in which panel responses were reinforced at the end of the delay interval in the presence of sDl, Condition 1, or sD and the stimulus trace of sD2 (Condition 11). Panel responses were never reinforced in the absence of these stimuli, a condition which prevailed on an average of 3 minutes (VI3) between trials. Following this training, the onset of the delay interval sD1 was made contingent on the occurrence of a lever press response. Several predictions were made employing primarily the concepts of the relationship of the discriminative sD and secondary reinforcing (sR) properties of a stimulus, and also the relationship of panel pressing behavior during the delay interval and lever pressing. [TRUNCATED