Subject(s)
Brain/physiology , Conditioning, Classical , Electric Stimulation , Inhibition, Psychological , Acoustic Stimulation , Animals , Auditory Perception , Electrodes, Implanted , Electroshock , Generalization, Stimulus , Geniculate Bodies/physiology , Housing, Animal , Hypothalamus/physiology , Nictitating Membrane/physiology , Rabbits , Self Stimulation , Stereotaxic Techniques , Thalamic Nuclei/physiologySubject(s)
Conditioning, Classical , Geniculate Bodies/physiology , Hypothalamus/physiology , Inhibition, Psychological , Nictitating Membrane/physiology , Reinforcement, Psychology , Acoustic Stimulation , Animals , Attention , Auditory Perception , Discrimination, Psychological , Electric Stimulation , Electrodes, Implanted , Female , Generalization, Stimulus , Male , Noise , Rabbits , Reinforcement Schedule , Stereotaxic TechniquesABSTRACT
We describe the recent results of our efforts to characterize a photorefractive crystal to be used as a time-integrating device in an optically implemented null-steering adaptive processor for phased-array radar. We review frequency response data for the Bi(12)SiO(20) crystals, measured with an acousto-optic apparatus, and we present measured dynamic range data for the candidate Bi(12)SiO(20) crystals.
ABSTRACT
A study was conducted to determine the effects of strapped spectacles on the fit factors obtained during quantitative fit testing on three different brands of full facepiece negative pressure respirators. The three brands of respirators were evaluated with and without strapped spectacles worn by the test subjects. A total of 180 quantitative fit testing trials were conducted on ten male test subjects. For each test subject, three quantitative fit testing trials were performed with each brand of respirator with and without the spectacles. The average of the fit testing trials for each subject with each respirator was used for statistical analysis. The results demonstrated that the fit factor values were significantly lower during use of the spectacles (p < 0.05). The estimated percentage of test subjects who failed the American National Standards Institute pass/fail criteria for quantitative fit testing (1000) increased by 15-36% when spectacles were worn.