1,036 research outputs found

    The Social Perceptions Of The Highly Intelligent

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    Mass media is portraying highly intelligent people as having noticeable deficits in their social skills. Shows such as The Big Bang Theory are very popular and watched by millions. This suggests that the population has a perception of intelligent individuals being odd and not having many friends. This study looks at how perceived intelligence affects the likeableness of an individual. The perception of intelligence was raised or lowered according to the grade level of the words used in several descriptive paragraphs. Non-verbal cues were eliminated by using written paragraphs rather than individuals speaking. It was expected that perceived intelligence would be inversely correlated with likeableness, and that this bias against higher intelligence would be stronger for a hypothetical women being rated than for a hypothetical man. Support was found for the basic hypothesis that perceived intelligence was negatively correlated with perceived likeableness, but this negative relationship was no stronger for women than it was for men

    Scientific CCD technology at JPL

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    Charge-coupled devices (CCD's) were recognized for their potential as an imaging technology almost immediately following their conception in 1970. Twenty years later, they are firmly established as the technology of choice for visible imaging. While consumer applications of CCD's, especially the emerging home video camera market, dominated manufacturing activity, the scientific market for CCD imagers has become significant. Activity of the Jet Propulsion Laboratory and its industrial partners in the area of CCD imagers for space scientific instruments is described. Requirements for scientific imagers are significantly different from those needed for home video cameras, and are described. An imager for an instrument on the CRAF/Cassini mission is described in detail to highlight achieved levels of performance

    Method for producing a hybridization of detector array and integrated circuit for readout

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    A process is explained for fabricating a detector array in a layer of semiconductor material on one substrate and an integrated readout circuit in a layer of semiconductor material on a separate substrate in order to select semiconductor material for optimum performance of each structure, such as GaAs for the detector array and Si for the integrated readout circuit. The detector array layer is lifted off its substrate, laminated on the metallized surface on the integrated surface, etched with reticulating channels to the surface of the integrated circuit, and provided with interconnections between the detector array pixels and the integrated readout circuit through the channels. The adhesive material for the lamination is selected to be chemically stable to provide electrical and thermal insulation and to provide stress release between the two structures fabricated in semiconductor materials that may have different coefficients of thermal expansion

    Report of the sensor readout electronics panel

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    The findings of the Sensor Readout Electronics Panel are summarized in regard to technology assessment and recommended development plans. In addition to two specific readout issues, cryogenic readouts and sub-electron noise, the panel considered three advanced technology areas that impact the ability to achieve large format sensor arrays. These are mega-pixel focal plane packaging issues, focal plane to data processing module interfaces, and event driven readout architectures. Development in each of these five areas was judged to have significant impact in enabling the sensor performance desired for the Astrotech 21 mission set. Other readout issues, such as focal plane signal processing or other high volume data acquisition applications important for Eos-type mapping, were determined not to be relevant for astrophysics science goals

    The electrorheology of suspensions consisting of Na-Fluorohectorite synthetic clay particles in silicon oil

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    Under application of an electric field greater than a triggering electric field Ec0.4E_c \sim 0.4 kV/mm, suspensions obtained by dispersing particles of the synthetic clay fluoro-hectorite in a silicon oil, aggregate into chain- and/or column-like structures parallel to the applied electric field. This micro-structuring results in a transition in the suspensions' rheological behavior, from a Newtonian-like behavior to a shear-thinning rheology with a significant yield stress. This behavior is studied as a function of particle volume fraction and strength of the applied electric field, EE. The steady shear flow curves are observed to scale onto a master curve with respect to EE, in a manner similar to what was recently found for suspensions of laponite clay [42]. In the case of Na-fluorohectorite, the corresponding dynamic yield stress is demonstrated to scale with respect to EE as a power law with an exponent α1.93\alpha \sim 1.93, while the static yield stress inferred from constant shear stress tests exhibits a similar behavior with α1.58\alpha \sim 1.58. The suspensions are also studied in the framework of thixotropic fluids: the bifurcation in the rheology behavior when letting the system flow and evolve under a constant applied shear stress is characterized, and a bifurcation yield stress, estimated as the applied shear stress at which viscosity bifurcation occurs, is measured to scale as EαE^\alpha with α0.5\alpha \sim 0.5 to 0.6. All measured yield stresses increase with the particle fraction Φ\Phi of the suspension. For the static yield stress, a scaling law Φβ\Phi^\beta, with β=0.54\beta = 0.54, is found. The results are found to be reasonably consistent with each other. Their similarities with-, and discrepancies to- results obtained on laponite-oil suspensions are discussed

    Low-degree multi-spectral p-mode fitting

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    We combine unresolved-Sun velocity and intensity observations at multiple wavelengths from the Helioseismic and Magnetic Imager and Atmospheric Imaging Array onboard the Solar Dynamics Observatory to investigate the possibility of multi-spectral mode-frequency estimation at low spherical harmonic degree. We test a simple multi-spectral algorithm using a common line width and frequency for each mode and a separate amplitude, background and asymmetry parameter, and compare the results with those from fits to the individual spectra. The preliminary results suggest that this approach may provide a more stable fit than using the observables separately
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