Brain mechanisms of arousal, attention and perception
Neural mechanisms underlying visual perception, arousal, and attention processes in man, cat, and monkey
Lindsley, D. B.↗
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Doppler radar measurements of mean wind variations in the clear atmosphere
CAT wind structure and velocity dynamics, using Doppler radar techniques
Dobson, E. B.↗
A study of clear air turbulence using sensitive radars
CAT radar observation from instrumented and uninstrumented jet fighter flights, analyzing data statistically for spatial correspondence of ground and airborne observations
Duquette, E. F.↗
Simultaneous radar and instrumented aircraft observations in a clear air turbulent layer
CAT layer simultaneous radar and instrumented aircraft observations, noting eddy dissipation rate computation from radar reflectivity measurement
Kropfli, R. A.↗
Scanning electron microscopy of the organ of Corti
Cochlear sensory epithelium and Corti organ degeneration after noise exposure in guinea pigs and cats, using scanning electron microscopy
Ades, H. W.↗
Radar, aircraft, and meteorological observations of shear induced clear air turbulence
High power 10 cm radar as CAT detector, comparing with radar and aircraft data coincident in space and time
Boucher, R. J.↗
Intracochlear potential recorded with micropipets. I - Correlations with micropipet location. II - Responses in the cochlear scalae to tones. III - Relation of cochlear microphonic potential to stapes velocity
Intracochlear electric potential of anesthetized cats recorded with potassium filled glass micropipets, determining magnitude and phase of responses
Peake, W. T.↗
Electrophysiological studies of the nervous system
The electrophysiology of the nervous system is studied using cats and human subjects. Data cover effects of chlorolose on evoked potential, the evoked resistance shift that accompanies evoked potentials, and the relationship of eye movements to potentials aroused by visual stimulation.
Galambos, R.↗
Jones's matrix representation of optical instruments. II - Fourier interferometers /spectrometers and spectropolarimeters/.
Our method of matrix synthesis of optical components and instruments is applied to the derivation of Jones's matrices appropriate for Fourier interferometers (spectrometers and spectropolarimeters). These matrices are obtained for both the source beam and the detector beam. In the course of synthesis, Jones's matrices of the various reflectors (plane mirrors; retroreflectors: roofed mirror, trihedral and prism cube corner, cat's eye) used by these interferometers are also obtained.
Fymat, A. L.↗
Self-rotation of animate beings.
Consideration of the ability of both animals and humans to perform well-controlled self-rotation maneuvers while falling freely for short periods of time in the neighborhood of the earth's surface. Specifically, an analytical theory dealing with the righting movements of falling cats is constructed, and the validity of this theory is tested by reference to photographs. Pitch, yaw, and roll motions generated by arm and leg motions of humans are studied analytically and, in the case of yaw motions, experimentally.
Kane, T. R.↗
Hypothalamic stimulation and baroceptor reflex interaction on renal nerve activity.
The basal level of mean renal nerve activity (MRNA-0) measured in anesthetized cats was found to be modified by the additive interaction of hypothalamic and baroceptor reflex influences. Data were collected with the four major baroceptor nerves either intact or cut, and with mean aortic pressure (MAP) either clamped with a reservoir or raised with l-epinephrine. With intact baroceptor nerves, MRNA stayed essentially constant at level MRNA-0 for MAP below an initial pressure P1, and fell approximately linearly to zero as MAP was raised to P2. Cutting the baroceptor nerves kept MRNA at MRNA-0 (assumed to represent basal central neural output) independent of MAP. The addition of hypothalamic stimulation produced nearly constant increments in MRNA for all pressure levels up to P2, with complete inhibition at some level above P2. The increments in MRNA depended on frequency and location of the stimulus. A piecewise linear model describes MRNA as a linear combination of hypothalamic, basal central neural, and baroceptor reflex activity.
Wilson, M. F.↗
A case study of persistent, intense, clear air turbulence in an upper level frontal zone.
Widespread and persistent clear air turbulence (CAT) occurred over the Eastern Seaboard of the U.S. between New York and South Carolina on 18 March 1969. The major synoptic features and a qualitative discussion of the factors contributing to the development of the large vertical wind shears associated with the turbulence are presented. The turbulent region in the vicinity of Wallops Island, Va., was probed with a NASA T-33 research aircraft and with sensitive radars. The clear air radar echoes and the most intense turbulence occurred principally within an upper level frontal zone of about 2 km depth which was produced by the confluence of two currents of widely different origin.
Reed, R. J.↗
Linear kinematic air bearing
Bearing provides continuous, smooth movement of the cat's-eye mirror, eliminating wear and deterioration of bearing surface and resulting oscillation effects in servo system. Design features self-aligning configuration; single-point, pivotal pad mounting, having air passage through it; and design of pads that allows for precise control of discharge path of air from pads.
Mayall, S. D.↗
Study of airborne science experiment management concepts for application to space shuttle. Volume 3: Appendixes
Detailed information is presented concerning specific airborne missions in support of the ASSESS program. These missions are the AIDJEX expeditions, meteor shower expeditions, CAT and atmospheric sampling missions, ocean color expeditions, and the Lear Jet missions. For Vol. 2, see N73-31729.
Mulholland, D. R.↗
An analysis of the circuitry of the visual pathway of the lateral eye of limullus
The methodology is discussed for three-dimensional analysis of the nervous system on the basis of electron micrographs of serial sections. An analysis is presented of a part of the circuitry of the rabbit retina. In addition, some exploratory work is reported with respect to the visual cortex of the cat brain. A proper technique for preservation of the visual cortex was worked out and a technique to localize microelectrode tips in the tissue in connection with electron microscopy was partially worked out.
Sjoestrand, F. S.↗
U-Th-Pb systematics
The following boulder samples are analyzed for U, Th, and Pb concentrations and for Pb isotopic compositions: 72275,53/matrix; 72275,73/matrix; 72275,81/dark rind, clast #1; 72275,117/white interior, clast #1; 72255,49/Civet Cat clast; 72255,54/light gray matrix; and 72255,67/dark gray matrix.
Nunes, P. D.↗
Correlation of hippocampal theta rhythm with changes in cutaneous temperature
A possible role for the hippocampus in alerting an animal to changes in cutaneous temperature was examined. Following local warming or cooling of the ears of unanesthetized, loosely restrained rabbits, theta waves (4-7 Hz EEG waves) were recorded from electrodes straddling the hippocampus. The onset of the hippocampal theta rhythm was correlated with changes in cutaneous temperature, an observation consistent with studies indicating that the theta rhythm is a nonspecific response evoked by stimulation of several sensory modalities. Additional data from cats and rabbits were correlated with specific neurons within the hippocampus, namely pyramidal cells. Post stimulus time histograms obtained by excitation of the dorsal fornix were interpreted in terms of excitatory and inhibitory inputs to pyramidal cells. Thus, the theta rhythm, which appears to be evoked by changes in cutaneous temperature, can be related to a specific type of hippocampal neuron which is in turn connected with other areas of the brain involved in temperature regulation.
Horowitz, J. M.↗
Influence of G-forces on venous and nervous systems
Cats and rabbits were subjected to rotation in the centrifuge. Controls were maintained to determine the individual tolerance to g-forces. Thickening of the vascular wall was found to occur due to the g-forces' effect, as well as other vascular changes. Nervous changes included edema and chromatolysis of the nerve cells.
Dyskin, Y. A.↗