935 research outputs found

    Relationship of Cognitive Style and Theoretical Orientation to Psychology Interns\u27 Preferences for Supervision

    Get PDF
    This study (N  = 106) investigated the effects of cognitive style and theoretical orientation on psychology interns\u27 judgments about the type of supervision they find most beneficial. Preferences for task-oriented and relationship-oriented supervision have been hypothesized to indicate lower and higher levels of professional development, respectively. This study, however, found that trainees\u27 cognitive styles and the behavioral emphasis of their theoretical orientations were also significantly related to their preferences for these two types of supervisory environments. Individual-difference variables in addition to developmental level may need to figure more prominently in future models of psychotherapist training and supervision

    Neurophysiological foundations of organ electrodermal diagnostics, acupuncture, TENS and other reflexive therapies: review

    Get PDF
    The nervous system is the primary computing system of the human body. The sensory nervous system detects any damage done to the body from both outside and inside and sends the information, at the earliest stage of pathology, to the central nervous system (CNS), which controls potent self-defense mechanisms. The CNS cannot simultaneously process all available information, originating internally and externally, due to limited capacity. The necessity to eliminate information which is less important at the time, created the specific converging structure of the sensory nervous system. Due to this structure, signals sent from internal organs to the CNS can also reach certain skin areas influencing their electrical characteristics. In this way organ electrodermal diagnostics (OED) may get access to this 'first hand' source of diagnostic information. The CNS gives higher priority to signals resulting from external stimuli (skin) than to messages coming from internal organs: information coming from sensory organs is generally more important for the organism's self-defense and survival. This is why signals generated by internal organs can be blocked by even mild stimulation of the relevant skin areas. 'Convergence modulation theory' is introduced, which proposes that acupuncture and other reflexive therapies function by controlling the flow of information in the nervous system and thereby reprogramming the powerful self-defense systems according to actual needs. Southern African Journal of Analgesia and Anaesthetics Vol10(3) 2004: 21-2

    Local Fuel Starvation Degradation of an Automotive PEMFC Full Size Stack

    Get PDF
    Special Issue: 23rd EFCF “Low‐Temperature Fuel Cells, Electrolyzers, H2‐Processing Forum” (EFCF2019

    Bayesian inference for radio observations

    Get PDF
    New telescopes like the Square Kilometre Array (SKA) will push into a new sensitivity regime and expose systematics, such as direction-dependent effects, that could previously be ignored. Current methods for handling such systematics rely on alternating best estimates of instrumental calibration and models of the underlying sky, which can lead to inadequate uncertainty estimates and biased results because any correlations between parameters are ignored. These deconvolution algorithms produce a single image that is assumed to be a true representation of the sky, when in fact it is just one realization of an infinite ensemble of images compatible with the noise in the data. In contrast, here we report a Bayesian formalism that simultaneously infers both systematics and science. Our technique, Bayesian Inference for Radio Observations (BIRO), determines all parameters directly from the raw data, bypassing image-making entirely, by sampling from the joint posterior probability distribution. This enables it to derive both correlations and accurate uncertainties, making use of the flexible software meqtrees to model the sky and telescope simultaneously. We demonstrate BIRO with two simulated sets of Westerbork Synthesis Radio Telescope data sets. In the first, we perform joint estimates of 103 scientific (flux densities of sources) and instrumental (pointing errors, beamwidth and noise) parameters. In the second example, we perform source separation with BIRO. Using the Bayesian evidence, we can accurately select between a single point source, two point sources and an extended Gaussian source, allowing for ‘super-resolution' on scales much smaller than the synthesized bea

    Post-mortem computed tomography is a useful tool for determining the pulmonary ventilation status in newborns

    Get PDF
    <jats:title>Abstract</jats:title><jats:sec> <jats:title>Introduction</jats:title> <jats:p>Lung ventilation is a standard sign of life in newborns. Post-mortem computed tomography (PMCT) is highly sensitive to the presence of gas in the body including the lungs. Current standard examinations to determine the pulmonary ventilation status in newborns are the flotation test and histology. The purpose of this study was to compare the accuracy of PMCT with the flotation test for determining the lung ventilation status with histological control as reference standard. A cut-off value as CT number in Hounsfield Units (HU) determining lung ventilation of newborns in PMCT should be established.</jats:p> </jats:sec><jats:sec> <jats:title>Methods</jats:title> <jats:p>A total of 38 infant lungs were examined of which 21 lungs were from infants deceased shortly after live birth (control group) and 17 lungs belonged to infants where live birth was in question (study group). All lungs were examined using PMCT, flotation test, and histological examination.</jats:p> </jats:sec><jats:sec> <jats:title>Results</jats:title> <jats:p>The control group showed an overall mean attenuation ± standard deviation of −219 HU ± 135; the study group of 45 ± 15 HU in histologically nonventilated lungs versus −192 ± 207 HU; (<jats:italic>p</jats:italic> < 0.001) in ventilated lungs. The best cut-off value for optimal discrimination of ventilated and nonventilated lungs in newborns was −35 mean HU.</jats:p> </jats:sec><jats:sec> <jats:title>Conclusion</jats:title> <jats:p>PMCT is equally well suited to determine lung ventilation as the flotation test. It provides additional information regarding pulmonary infiltration, degree of putrefaction, or signs of trauma (fractures, pneumothorax). Histology remains mandatory in ambiguous cases.</jats:p> </jats:sec&gt

    Deep recurrent neural networks for supernovae classification

    Get PDF
    We apply deep recurrent neural networks, which are capable of learning complex sequential information, to classify supernovae (code available at https://github.com/adammoss/supernovae). The observational time and filter fluxes are used as inputs to the network, but since the inputs are agnostic, additional data such as host galaxy information can also be included. Using the Supernovae Photometric Classification Challenge (SPCC) data, we find that deep networks are capable of learning about light curves, however the performance of the network is highly sensitive to the amount of training data. For a training size of 50% of the representational SPCC data set (around 104 supernovae) we obtain a type-Ia versus non-type-Ia classification accuracy of 94.7%, an area under the Receiver Operating Characteristic curve AUC of 0.986 and an SPCC figure-of-merit F 1 = 0.64. When using only the data for the early-epoch challenge defined by the SPCC, we achieve a classification accuracy of 93.1%, AUC of 0.977, and F 1 = 0.58, results almost as good as with the whole light curve. By employing bidirectional neural networks, we can acquire impressive classification results between supernovae types I, II and III at an accuracy of 90.4% and AUC of 0.974. We also apply a pre-trained model to obtain classification probabilities as a function of time and show that it can give early indications of supernovae type. Our method is competitive with existing algorithms and has applications for future large-scale photometric surveys

    Програмний модуль проектування розміщення аероіонізаційних систем

    Get PDF
    The recently synthesized ThFeAsN iron-pnictide superconductor exhibits a TcT_c of 30 K, the highest of the 1111-type series in absence of chemical doping. To understand how pressure affects its electronic properties, we carried out microscopic investigations up to 3 GPa via magnetization, nuclear magnetic resonance, and muon-spin rotation experiments. The temperature dependence of the 75{}^{75}As Knight shift, the spin-lattice relaxation rates, and the magnetic penetration depth suggest a multi-band s±s^{\pm}-wave gap symmetry in the dirty limit, while the gap-to-TcT_c ratio Δ/kBTc\Delta/k_\mathrm{B}T_c hints at a strong-coupling scenario. Pressure modulates the geometrical parameters, thus reducing TcT_c, as well as TmT_m, the temperature where magnetic-relaxation rates are maximized, both at the same rate of approximately -1.1 K/GPa. This decrease of TcT_c with pressure is consistent with band-structure calculations, which relate it to the deformation of the Fe 3dz2d_{z^2} orbitals.Comment: 6 pages, 4 figure

    Fast Spectral Variability from Cygnus X-1

    Full text link
    We have developed an algorithm that, starting from the observed properties of the X-ray spectrum and fast variability of an X-ray binary allows the production of synthetic data reproducing observables such as power density spectra and time lags, as well as their energy dependence. This allows to reconstruct the variability of parameters of the energy spectrum and to reduce substantially the effects of Poisson noise, allowing to study fast spectral variations. We have applied the algorithm to Rossi X-ray Timing Explorer data of the black-hole binary Cygnus X-1, fitting the energy spectrum with a simplified power law model. We recovered the distribution of the power law spectral indices on time-scales as low as 62 ms as being limited between 1.6 and 1.8. The index is positively correlated with the flux even on such time-scales.Comment: 14 pages, 19 figures, accepted by MNRA

    Rms-flux relation of Cyg X-1 with RXTE: dipping and nondipping cases

    Full text link
    The rms (root mean square) variability is the parameter for understanding the emission temporal properties of X-ray binaries (XRBs) and active galactic nuclei (AGN). The rms-flux relation with Rossi X-ray Timing Explorer (RXTE) data for the dips and nondip of black hole Cyg X-1 has been investigated in this paper. Our results show that there exist the linear rms-flux relations in the frequency range 0.1-10 Hz for the dipping light curve. Moreover, this linear relation still remains during the nondip regime, but with the steeper slope than that of the dipping case in the low energy band. For the high energy band, the slopes of the dipping and nondipping cases are hardly constant within errors. The explanations of the results have been made by means of the ``Propagating Perturbation'' model of Lyubarskii (1997).Comment: 15 pages, 12 figures, Accepted for publication in Astrophysics & Space Scienc

    Simulations of X-ray spectral/timing properties in a propagation model of variability of accreting black holes

    Get PDF
    A phenomenological model of X-ray variability of accreting black holes is considered, where the variable emission is attributed to multiple active regions/perturbations moving radially towards the central black hole. The hard X-rays are produced by inverse Compton upscattering of soft photons coming from reprocessing/thermalization of the same hard X-rays. The heating rate of the Comptonizing plasma is assumed to scale with the rate of dissipation of gravitational energy while the supply of soft photons is assumed to diminish towards the center. Two scenarios are considered: (1) an inner hot flow with outer truncated standard accretion disc and (2) an accretion disc with an active corona and a thick hot ionized skin. A variant of the model is also considered, which is compatible with the currently discussed multi-Lorentzian description of power spectral densities of X-ray lightcurves. In the inner hot flow scenario the model can reproduce the observed Fourier frequency resolved spectra observed in X-ray binaries, in particular the properties of the reprocessed component as functions of Fourier frequency. In the accretion disc with ionized skin scenario the reduction of soft photons due to the ionized skin is insufficient to produce the observed characteristics.Comment: 8 pages, MNRAS, replaced with the accepted version, minor changes in formulae in Sec. 3.
    corecore