958 research outputs found

    Visual attitude orientation and alignment system

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    Active vehicle optical alignment aid and a passive vehicle three-dimensional alignment target ensure proper orientation and alignment plus control of the closure range and rate between two bodies, one in controlled motion and one at rest

    Thermodielectric radiometer

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    Radiometer measures microsecond pulses of radiant flux in the presence of electromagnetic noise. It consists of a charged capacitor that delivers a voltage pulse proportional to the thermally induced depolarization of its polymeric dielectric

    Universal vortex-state Hall conductivity of YBa2Cu3O7 single crystals with differing correlated disorder

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    The vortex-state Hall conductivity ([sigma][sub]xy) of YBa2Cu3O7 single crystals in the anomalous-sign-reversal region is found to be independent of the density and orientation of the correlated disorder. After the anisotropic-to-isotropic scaling transformation is carried out, a universal scaled Hall conductivity [sigma][bar][sub]xy is obtained as a function of the reduced temperature (T/T[sub]c) and scaled magnetic field strength (H[bar]) for five samples with different densities and orientation of controlled defects. The transport scattering times {tau], derived from applying the model given by Feigel'man et al (Feigel'man M V, Geshkenbein V B, Larkin A I and Vinokur V M 1995 Pis. Zh. Eksp. Teor. Fiz. 62 811 (Engl. Transl. 1995 JETP Lett. 62 835)) to the universal Hall conductivity [sigma bar](T/T[sub]c, H[bar]), are consistent in magnitude with those derived from other measurements for quasiparticle scattering, and are much smaller than the thermal relaxation time of vortex displacement and than the vortex–defect interaction time. Our experimental results and analyses therefore suggest that the anomalous sign reversal in the vortex-state Hall conductivity is associated with the intrinsic properties of type-II superconductors, rather than extrinsic disorder effects

    Laser beam hydrocarbon detector

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    Portable instrument passes light from helium-neon laser at a wavelength of 3.39 microns through the atmosphere being monitored and measures attenuation of the laser beam. Since beam attenuation is due almost exclusively to absorption of radiation by hydrocarbons, a quantitative measure of their concentration is available

    Civilians on the Battlefield: Creating a Realistic Training Aid for the United States Military

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    The United States and our allies and partners have adopted a humane approach to warfare based on established principle of the laws of war centered on the principles of Military Necessity, Humanity, Proportionality, Distinction, and Honor. These principles dictate that US Military forces conduct warfare with a careful consideration of our impact on civilian populations with a special duty to protect and limit harm as much as possible given the accomplishment of a mission. Likewise, the US Military has developed a sound counterinsurgency and unified action military model that recognizes that warfare is not fought simply with kinetic force, but rather is conducted across an array of areas, including the battle for “hearts and minds” of civilian populations to assist with military actions and legitimize lawful governments. These two factors contribute to a steady requirement to train military forces to respond properly when confronted with civilians on the battlefield. Unfortunately, the only viable method to provide this training is to employ large numbers of role-players – either in a live training setting or controlling entities in a wargame. These role-players must either be hired or be tasked from other military units. There are currently no viable autonomous solutions. The result is that commanders often choose to forego this training as too costly – which could have serious long-term ramifications for military forces confronting civilians in the real world. Can agent based modelling accurately represent civilians confronted with military operations to provide realistic training for military leaders and Soldiers? This thesis investigates this question and develops an agent-based model to explore the answer

    A Survey of Selected National Leaders in the Areas of Shorthand and Typewriting from 1956-1976

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    A thesis presented to the Business Education Graduate Committee at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Business Education by Carolyn D. Beam on July 11, 1978

    Effects of lattice distortion and Jahn–Teller coupling on the magnetoresistance of La0.7Ca0.3MnO3 and La0.5Ca0.5CoO3 epitaxial films

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    Studies of La0.7Ca0.3MnO3 epitaxial films on substrates with a range of lattice constants reveal two dominant contributions to the occurrence of colossal negative magnetoresistance (CMR) in these manganites: at high temperatures (T → TC, TC being the Curie temperature), the magnetotransport properties are predominantly determined by the conduction of lattice polarons, while at low temperatures (T ≪ TC/, the residual negative magnetoresistance is correlated with the substrate-induced lattice distortion which incurs excess magnetic domain wall scattering. The importance of lattice polaron conduction associated with the presence of Jahn–Teller coupling in the manganites is further verified by comparing the manganites with epitaxial films of another ferromagnetic perovskite, La0.5Ca0.5CoO3. Regardless of the differences in the substrate-induced lattice distortion, the cobaltite films exhibit much smaller negative magnetoresistance, which may be attributed to the absence of Jahn–Teller coupling and the high electron mobility that prevents the formation of lattice polarons. We therefore suggest that lattice polaron conduction associated with the Jahn–Teller coupling is essential for the occurrence of CMR, and that lattice distortion further enhances the CMR effects in the manganites

    Masculine and Feminine Facial Muscle Reactivity in Response to Observation

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    Individuals are consciously and unconsciously motivated by the need to fit in with social situations in order to maintain health and upkeep appearances (Hale et al., 2005). The literature has shown that individuals tend to change their facial expressions, particularly their zygomatic and ocularis muscles, in response to social situations, and they tend to exhibit an elevated heart rate (Brandenburg et al., 2022; Linnunsalo 2023). We predict females will exhibit these traits more due to their increased empathy and natural facial reactivity caused by the social pressures that dictate display rules of emotion by gender (Pollack, 1998; Adams Jr., 2014). We tested participants from Belmont University\u27s Introduction to Psychology classes by having them take an assessment while hooked up to a facial EMG and ECG. These participants were split up into three conditions to test the importance of social observation: in person observation, online observation, and no observation. Our expected results might suggest that higher facial muscle reactivity and heart rate will be found in more feminine individuals. With these findings, it can be suggested that social presence and societal pressures surrounding gender norms have a lasting impact in all facets of our lives
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