Oscillographic Study Research Articles

Instrumented oscillographic study on impact toughness of an axle steel DZ2 with different tempering temperatures

Instrumented oscillographic study on impact toughness of an axle steel DZ2 with different tempering temperatures

Nonequilibrium Spin-Hall Detector with Alternating Current

An oscillographic study of the Hall voltage with an unpolarized alternating current through a platinum sample revealed chiral features of the Hall effect, which clearly demonstrate the presence of the spin Hall effect in metals with a noticeable spin-orbit interaction. It was confirmed that, as in the case of direct current, the possibility of a spin-Hall effect is associated with the presence of an imbalance of the spins and charges at the edges of the samples, which is realized using their asymmetric geometry. In particular, it was found that such chiral features of the nonequilibrium spin-Hall effect (NSHE), such as independence from the direction of the injection current and the direction of the constant magnetic field, in the case of alternating current, make it possible to obtain a double-frequency transverse voltage, which can be used as a platform for creating spintronics devices.

François Grémy, a Humanist and Information Sciences Pioneer

François Grémy, a Humanist and Information Sciences Pioneer

Electromechanical properties of magnetite transducer

An oscillographic study was done in Fe 3O 4 magnetite which gave some light about the generated polarization with the applied electric AC field in playing dielectric hysteresis loop. It was noticed that the dielectric constant increased with enhancing temperature, which was attributed to the rapid hopping of electrons between Fe 2+↔Fe 3+at the octahedral sites (B sites) leading to the orientation of domain walls in the direction of the applied AC electric field. The resonant frequency and antiresonance of vibrating tablets have been studied as a function of temperature. The decrease of the resonant frequency with rising temperature was attributed to increase the polarization which facilitate the interaction of domains with the applied AC field at lower frequency. The decrease of the ultrasonic wave velocity with the increase of temperature, was also studied. Magnetite transducers is useful for ultrasonic generation to be used in medical purposes and under water sound transducer.

Oscillographic study of the dielectric polarization of Cu-doped NiZn ferrite

A series of samples of the system Ni 0.65Zn 0.35Cu x Fe 2- x O 4 ( x = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) were prepared using the usual ceramic technique. X-ray analyses showed that the samples have cubic spinel structure (single phase). The oscillographic study of the dielectric hysteresis loops showed an increase in the induced polarization of the samples with Cu additions x and have maximum value at x = 0.3. For x ⩽ 0.3, the local displacement of electrons in the direction of the applied electric field due to the electronic exchange Cu 2+ + Fe 4+ ⇋ Cu 3+ + Fe 3+ gives rise to the dielectric polarization. Mainly, the reduction of Cu 2+ to Cu 3+ during the sintering process causes a decrease in the hopping electrons between Fe 4+ and Fe 3+ ions, resulting in a decrease in the dielectric polarization with Cu additions more than 0.3. A good agreement between the calculated dielectric constant and the dissipation factor, based on the oscillographic dielectric hysteresis loops, and their experimental values was obtained.

Oscillographic study of electrical explosion in copper and gold

An oscilloscope is used to measure electrical resistance as a function of enthalpy in copper and gold during the process of electrical explosion of wire samples. The enthalpy at the initial point of the explosion process was greater in value than at the melting point of the metal. The electrical explosion phenomenon is considered from the viewpoint of the kinetics of the liquid-metalvapor transition under impulse-heating conditions. The “degeneration” of the initial point of the electrical explosion for liquid-phase heating over periods less than 10−7 sec is explained by disruption of the stability of homogeneous-vapor-nucleus formation.

Ionization Instability in Atmospheric-Pressure Gas Discharges

A photographic and oscillographic study of discharges in helium-carbon-dioxide mixtures at atmospheric pressure has shown that fine filaments develop in the discharge column. The origin of these nonuniform discharge paths is discussed, and a means for maximizing the energy input to the plasma prior to filamentation is presented. This process is of relevance to the design of TEA lasers.

Stable single-frequency emission of an argon-ion laser under line competition conditions

An investigation was made of the possibility of single-frequency emission of an argon-ion laser in the case of the simultaneous activity of two coupled transitions 4p2D05/2 → 4s2P3/2 and 4p4D05/2 → 4s2P3/2. The coherent emission spectra of both transitions were investigated. The regions of normal and anomalous competition between these transitions were determined. The criteria for single-frequency emission were established. An oscillographic study was made of the dependence of the emission spectrum on the discharge parameters.

Transient Currents in the Ozonizer

An oscillographic study of the ozonizer discharge under normal operating conditions is made and is discussed in the light of known mechanisms active in glass vessels with external electrodes. The investigation is extended to various gases and the features of the breakdown attributable to the glass itself are distinguished from those depending on the nature of the gas.

Oscillographic study of drop detachment from the dropping mercury electrode

Oscillographic study of drop detachment from the dropping mercury electrode

An oscillographic study of afferent connections to the hippocampus in the cat ( Felis Domesticus)

1. 1. Evoked responses have been recorded from the hippocampus as a result of stimulating at rates of from 1–15/sec in the so-called olfactory areas of the brain, including the olfactory bulb, olfactory tubercle, prepyriform and pyriform cortex, and amygdaloid nuclei. 2. 2. Hippocampal responses were also recorded when stimulating other areas of the brain, including the following: the septum, parts of the hypothalamus, certain thalamic nuclei, and the midbrain tegmentum. 3. 3. The hippocampal responses recorded when stimulating in the olfactory areas were abolished when the pyriform lobe was incised transversely, posterior to stimulation. 4. 4. Impulses from the olfactory areas of the brain go to the hippocampus. The directness of these projections (number of synapses) depends upon the specific area involved. 5. 5. Projections from the amygdala appear to be more direct than those from the olfactory bulb, olfactory tubercle, or prepyriform areas. 6. 6. Impulses from these olfactory areas traverse a route through the pyriform lobe and area entorhinalis to reach the hippocampus.

The Influence of Iodide Ions and Carbon Monoxide on the Anodic Dissolution of Active Iron

The kinetics of the dissolution of iron in sulfuric acid was investigated by polarizaton measurements in the presence of iodide ions or carbon monoxide as an inhibitor. The measurements included an oscillographic study of transient phenomena as well as steady states. The adsorption of iodide ions on iron was measured as a function of iodide concentration and anodic current density. The effects of iodide ions and carbon monoxide depend on the amount of inhibitor adsorbed on the iron surface. A possible mechanism for the dissolution of iron in the presence of iodide ions and carbon monoxide has been developed in analogy to the mechanism proposed earlier for the behavior in solutions not containing these inhibitors.

Polarographic and oscillographic study of some lanthanides (in German).

Polarographic and oscillographic study of some lanthanides (in German).

An oscillographic study of the central pathways of the vagus nerve in the cat.

An oscillographic study of the central pathways of the vagus nerve in the cat.

Some Aspects of Breakdown Streamers

Photomultiplier and oscillographic study of positive breakdown streamers yields values of current and distance of tip advance as a function of time. From these the relatively constant number $n$ of excess positive ions left behind by the streamer per cm advance and the tip velocity ${v}_{t}$ are obtained. These are related to the linear electron density ${n}_{c}$ per cm of streamer channel plasma and the electron drift velocity ${v}_{c}$ in the channel by ${n}_{c}{v}_{c}=n{v}_{t}$, with ${v}_{t}>{v}_{c}$. Since ${v}_{c}$ is related to the gradient ${X}_{c}$ in the channel by well-known drift velocity data, it is possible to limit the range of values of ${n}_{c}$ and ${v}_{c}$. The limiting conditions are that ${n}_{c}>n$, $\ensuremath{\int}{0}^{x}{X}_{c}\mathrm{dx}<{V}_{x}$, where ${V}_{x}$ is the applied potential, and finally that ${X}_{c}$ must be sufficiently large to maintain the channel conducting despite dissociative recombination and dissociative attachment losses. In longer channels heating cannot be neglected. The dense positive space charge left behind by the electron current in the ionized channel of radius $R$ causes a radial expansion of the excess space charge to a radius ${R}^{\ensuremath{'}}$ by incoming electron avalanches leading to a broad transient luminosity for some distance behind the tip. The tip and the conducting channel taking the return stroke, however, retain their small radius $R$.

Splanchnic afferent pathways in the central nervous system.

Splanchnic afferent pathways in the central nervous system.

Studies on Alternating Current Electrolysis: II . Oscillographic Studies

Reichenstein's oscillographic study of the alternating current electrolysis of aqueous sulfuric acid was repeated. His contention that the instantaneous value of the cell voltage at zero instantaneous current, corrected for iR drop, approaches a limiting maximum value as the rms value of the current increases was found to be true; but his statement that this maximum voltage is the thermodynamic decomposition potential of water was not verified. Actually, it turns out that this voltage includes the associated overvoltage. Oscillographic studies were also made on two reversible redox systems. Variations produced by changes in current density, concentration, frequency, and redox ratio were explained in terms of a qualitative theory.

Oscillographic study of hydroelectric units

AMAGNETIC oscillograph, with auxiliary equipment, has been found useful at the Grand Coulee Power Plant, Columbia Basin Project, for obtaining information about operating characteristics of hydroelectric units which cannot be obtained from the ordinary indicating and recording instruments. Quantities recorded include mechanical movement, hydraulic pressure, bearing loads, and turbine vibration and noise.

AN OSCILLOGRAPHIC STUDY OF OLFACTORY SYSTEM OF CATS

ArticlesAN OSCILLOGRAPHIC STUDY OF OLFACTORY SYSTEM OF CATSClement A. Fox, W. A. McKinley, and H. W. MagounClement A. Fox, W. A. McKinley, and H. W. MagounPublished Online:01 Jan 1944https://doi.org/10.1152/jn.1944.7.1.1MoreSectionsPDF (4 MB)Download PDF ToolsExport citationAdd to favoritesGet permissionsTrack citations ShareShare onFacebookTwitterLinkedInWeChat Back to Top Next Download PDF FiguresReferencesRelatedInformationCited ByHigher Olfactory Centres27 May 2008The Rhinencephalon and Behaviour21 May 2008Spatial Mapping of Evoked Brain Potentials and EEGs to Define Population State VariablesElectrophysiological and morphological features of rat claustral neurons: An intracellular staining studyNeuroscience, Vol. 85, No. 4Structure of the piriform cortex of the opossum. III. Ultrastructural characterization of synaptic terminals of association and olfactory bulb afferent fibersThe Journal of Comparative Neurology, Vol. 219, No. 4Intrinsic organization of snake lateral cortexJournal of Morphology, Vol. 165, No. 1Electrophysiology of the olfactory pathway in the pigeonJournal of Comparative Physiology ? A, Vol. 137, No. 1Olfactory relationships of the telencephalon and diencephalon in the rabbit. II. An autoradiographic and horseradish peroxidase study of the efferent connections of the anterior olfactory nucleusThe Journal of Comparative Neurology, Vol. 164, No. 4PUTATIVE TRANSMITTERS IN DENERVATED OLFACTORY CORTEXJournal of Neurochemistry, Vol. 24, No. 3An Ongoing Analysis of Hippocampal Inputs and Outputs: Microelectrode and Neuroanatomical Findings in Squirrel MonkeysLiteraturEvoked surface-positive potentials in isolated mammalian olfactory cortexBrain Research, Vol. 76, No. 2Responses of diencephalic neurons to olfactory bulb stimulation, odor, and arousalBrain Research, Vol. 36, No. 1An evoked potential study of centripetal and centrifugal connections of the olfactory bulb in the catBrain Research, Vol. 11, No. 2EFFECTS OF QUATERNARY BASES AND INORGANIC CATIONS ON ACETYLCHOLINE SYNTHESIS IN NERVOUS TISSUECanadian Journal of Physiology and Pharmacology, Vol. 45, No. 2THE PHARMACOLOGY OF NEURONES IN THE PYRIFORM CORTEX19 July 2012 | British Journal of Pharmacology and Chemotherapy, Vol. 26, No. 1Excitatory and Depressive Phenomena in the Olfactory System of the Sloth (Cholœpus Hoffmanni Peters)27 September 2008 | Archives Internationales de Physiologie et de Biochimie, Vol. 73, No. 5Degenerations in the claustrum after regional neocortical ablations in the catThe Journal of Comparative Neurology, Vol. 123, No. 3Alterations of behavior following stimulation of the claustrum of the catElectroencephalography and Clinical Neurophysiology, Vol. 17, No. 5Electrical activity of the olfactory systemElectroencephalography and Clinical Neurophysiology, Vol. 15, No. 2The Electrical Activity of A Priaaary Sensory Cortex: Analysis of Eeg WavesThe Activity of Neurons in the Amygdala of the Cat following Afferent StimulationAlterations in prepyriform evoked potential in relation to stimulus intensityExperimental Neurology, Vol. 6, No. 1An oscillographic study of afferent connections to the hippocampus in the cat (Felis Domesticus)Electroencephalography and Clinical Neurophysiology, Vol. 14, No. 1The claustrum, the external capsule and the extreme capsule of Macaca mulatta8 October 2004 | Journal of Comparative Neurology, Vol. 115, No. 3The main afferent connections of the reptilian telencephalon as determined by degeneration and electrophysiological methodsThe Journal of Comparative Neurology, Vol. 115, No. 2Responses of the hippocampus to stimulation of the olfactory bulb and of various afferent nerves in five mammalsExperimental Neurology, Vol. 2, No. 5A Specific Response in the Hippocampus of the Rabbit to Olfactory StimulationNature, Vol. 184, No. 4700Studies on the brain of the guinea Pig. II. The olfactory tracts and fornixThe Journal of Comparative Neurology, Vol. 112, No. 1Certain functional and anatomical relations of the cornu Ammonis of the macaque monkey. I. Functional relationsThe Journal of Comparative Neurology, Vol. 112, No. 1Rhinencephalic lesions and behavior in cats. An analysis of the Klüver-Bucy syndrome with particular reference to normal and abnormal sexual behavior8 October 2004 | Journal of Comparative Neurology, Vol. 108, No. 3Electrophysiological studies of hippocampal connections and excitabilityElectroencephalography and Clinical Neurophysiology, Vol. 8, No. 2SECTION OF PSYCHOLOGY: EMOTIONAL BEHAVIOR AND THE NERVOUS SYSTEM*30 April 2012 | Transactions of the New York Academy of Sciences, Vol. 18, No. 7 Series IIOlfactory arousal reactions in the “cerveau isolé” catElectroencephalography and Clinical Neurophysiology, Vol. 5, No. 2THE MORPHOLOGY OF THE OLFACTORY SYSTEM IN THE VERTEBRATESBiological Reviews, Vol. 28, No. 2An Electrophysiological Approach to the Study of Chemical Sensory Reception in Certain Insects31 May 2012 | The Canadian Entomologist, Vol. 85, No. 5Some psychiatric implications of physiological studies on frontotemporal portion of limbic system (Visceral brain)Electroencephalography and Clinical Neurophysiology, Vol. 4, No. 4Basal lead studies in epileptic automatismsElectroencephalography and Clinical Neurophysiology, Vol. 2, No. 1-4AN EXPERIMENTAL INVESTIGATION OF THE CONNEXIONS OF THE OLFACTORY TRACTS IN THE MONKEYJournal of Neurology, Neurosurgery & Psychiatry, Vol. 12, No. 4Fiber degeneration in Ammon's horn resulting from extirpations of the piriform and other cortical areas and from transection of the horn at various levelsThe Journal of Comparative Neurology, Vol. 88, No. 3 More from this issue > Volume 7Issue 1January 1944Pages 1-16 https://doi.org/10.1152/jn.1944.7.1.1History Published online 1 January 1944 Published in print 1 January 1944 Metrics

Some Aspects of the Transient and Steady State Tones of Organ Pipes and of Vibrating Strings

An oscillographic study of the initial transients of a large number of organ pipes reveals characteristics of these transients peculiar to each organ tone family. The duration of these transients is measured and is found to vary with tone family and with pitch. The effects of certain factors upon the initial transients are studied. Inharmonic partials are observed in some of the transients. The relationships between the partials in the steady state tones of normally blown organ pipes are investigated by highly accurate methods of frequency comparison. The partials in this case are found to be harmonic to a high degree of accuracy. An oscilloscopic method of comparison between the frequencies of the partials of a vibrating string shows that the partials of the vibrating string may be inharmonic in the state of free vibration (transient state), but reveals only harmonic relations between the partials of the string in the state of steady (forced) vibration.