444 research outputs found

    A Judicial Balancing Act: Evaluating the First Amendment Claims of Sitting Judges

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    On April 14, 2017, members of the New Millennium Church in Little Rock, Arkansas, gathered outside of Arkansas’s Governor’s Mansion to protest capital punishment. The mansion’s resident, Governor Asa Hutchinson, had recently scheduled eight executions for the month of April. Two members of the congregation held signs reading, “Other states are trying to abolish the death penalty[,] mine’s putting it on express lane.” New Millennium Church’s lead minister Wendell Griffen lay on a cot in front of his parishioners to symbolize the use of capital punishment on Jesus Christ

    Lead-free piezoelectric K0.5Bi0.5TiO3–Bi(Mg0.5Ti0.5)O3 ceramics with depolarisation temperatures up to ~220 C

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    The properties of K0.5Bi0.5TiO3-rich ceramic solid solutions in the system (1 - x)K0.5Bi0.5TiO3– xBi(Mg0.5Ti0.5)O3 are reported. The highest values of piezoelectric charge coefficient, d33, and field-induced strains are found in compositions located close to a compositional boundary between single-phase tetragonal and mixed tetragonal ? cubic perovskite phases. Maximum d33 values were *150 pC/N for x = 0.03, with positive strains of *0.25 %; the x = 0.04 composition had a d33 * 133 pC/N and strain of 0.35 % (bipolar electric field, 50 kV/ cm, 1 Hz). Depolarisation temperature Td is an important selection criterion for any lead-free piezoelectric for actuator or sensor applications. A Td of *220 C for x = 0.03 is *100 C higher than for the widely reported Na0.5Bi0.5TiO3–BaTiO3 system, yet d33 values and strains are similar, suggesting the new material is worthy of further attention as a lead-free piezoceramic for elevated temperature applications

    Dielectric stability in the relaxor: Na₀.₅Bi₀.₅TiO₃-Ba₀.₈Ca₀.₂TiO₃-Bi(Mg₀.₅Ti₀.₅)O₃- NaNbO₃ ceramic system

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    Ceramics with temperature-stable dielectric characteristics have been developed in the system: 0.6[0.85Na0.5Bi0.5TiO3-(0.15-x)Ba0.8Ca0.2TiO3-xBi(Mg0.5Ti0.5)O3]−0.4NaNbO3, x ≤ 0.15. Dielectric measurements exhibited relaxor ferroelectric characteristics with temperature-stable relative permittivity from εr~1330 ± 15% in the temperature range from −70 °C – 215 °C and tanδ ≤ 0.02 from −20 °C to 380 °C for x = 0 compositions. For the Bi(Mg0.5Ti0.5)O3 modified compositions the temperature range of stable relative permittivity extended from −70 °C to 400 °C, with εr ~ 950 ± 15% and tanδ ≤ 0.02 from −70 °C to 260 °C. Values of dc resistivity were ~ 108 Ω m at a temperature of 300 °C and the corresponding RC constant values were in the range from 0.40 − 0.78 s at 300 °C. All ceramic samples exhibited a linear polarisation-electric field response at maximum applied electric field of 5 kV/cm (1 kHz)

    Fast Sequences of Non-spatial State Representations in Humans

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    SummaryFast internally generated sequences of neural representations are suggested to support learning and online planning. However, these sequences have only been studied in the context of spatial tasks and never in humans. Here, we recorded magnetoencephalography (MEG) while human subjects performed a novel non-spatial reasoning task. The task required selecting paths through a set of six visual objects. We trained pattern classifiers on the MEG activity elicited by direct presentation of the visual objects alone and tested these classifiers on activity recorded during periods when no object was presented. During these object-free periods, the brain spontaneously visited representations of approximately four objects in fast sequences lasting on the order of 120 ms. These sequences followed backward trajectories along the permissible paths in the task. Thus, spontaneous fast sequential representation of states can be measured non-invasively in humans, and these sequences may be a fundamental feature of neural computation across tasks

    Effects of Triticale-Based Diets on Finishing Pig Performance and Pork Quality in Deep-Bedded Hoop Barns

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    Effects of triticale-based diets on finishing pig performance and pork quality in deep-bedded hoop barns were evaluated. Triticale is a synthetic small grain resulting from a cross between durum wheat and rye. The study consisted of four trials: two in winter (November 2003 through March 2004) and two in summer (May 2004 through September 2004) at the ISU Western Research and Demonstration Farm, Castana, IA. Each trial consisted of six pens of ten pigs (five barrows, five gilts) in three smallscale hoop barns (6.0 × 10.8 m). Pens were randomly assigned one dietary treatment: 1) corn-soybean meal control, 2) 40% Trical 815 triticale diet (by weight) or 3) 80% Trical 815 triticale diet (by weight). The 40 and 80% triticale diets had corn and soybean meal added. Animals had ad libitum access to feed and water during the study. Pigs were started on experiment at approximately 72 kg and fed for 49 d. At the end of each trial all pigs were scanned for backfat thickness and loin muscle area. Barrows from one winter and one summer trial were evaluated for meat and fat quality and sensory evaluation of pork. End weights and ADG were greater during the winter than summer (treatment × season interaction P \u3c 0.01) and decreased as triticale inclusion increased (P \u3c 0.001). Feed intake was similar. Pigs fed the control diet had the greatest G:F, those fed the 80% triticale diet had the least, with pigs fed the 40% triticale diet having intermediate G:F. During the summer, pigs fed the control diet had more BF (P \u3c 0.05) than those fed the triticale diets. Also during summer, pigs fed the control diet had the largest loin muscle area (LMA) (47.5 ± 1.72 cm2); pigs fed the 40% triticale diet had intermediate LMA (45.5 ± 1.72 cm2) and those fed the 80% triticale diet had the smallest LMA (43.4 ± 1.73 cm2). Dietary treatment had no effect on carcass weight, BF, LMA, percentage lean of barrows or sensory evaluation or fatty acid profile of loin chops. Ultimate pH was higher (P \u3c 0.001), percentage loin purge was less (P \u3c 0.05) and shear force (kg) was less (P \u3c 0.05) during summer than winter. Total monounsaturated fatty acids (MUFA) were greater (P \u3c 0.05) and total PUFA in loins were less (P \u3c 0.01) during the winter than summer. Replacing corn with triticale in finishing pig diets in hoops slightly decreased growth performance, but did not affect pork quality. Increasing the amount of triticale in finishing pig diets decreased dietary soybean meal and dicalcium phosphate levels. This may reduce dietary costs. However, pigs fed triticale had 10% less average daily gain and 13% poorer feed conversion at the greater inclusion rate (80% of the diet). This may offset the potentially lower dietary costs. Triticale can be fed to pigs without compromising pork or fat quality. There was no difference in pork eating quality from pigs fed corn-based or triticale-based diets, according to a trained sensory evaluation panel. Further research on triticale-based swine diets is warranted. Triticale-based diets in deep-bedded hoop barns should be evaluated when dietary fat is added, as finishing pig performance may be enhanced. An economic analysis should be conducted on utilization of triticale as a feedstuff in swine diets fed to finishing pigs in deep-bedded hoop barns. From the results of this study, triticale has potential as a feed grain crop in integrated crop and livestock enterprises in the Midwest U. S

    Effects of Triticale-Based Diets fed in Deep-Bedded Hoop Barns on Finishing Pig Performance and Pork Quality

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    Triticale is a synthetic small grain that results from an intergeneric cross between durum wheat and rye. Triticale has shown potential as a feedstuff in swine diets. Producers who may find this to be an attractive crop may also raise swine in an alternative swine production system. The objective of the present study was to evaluate the effects of triticale-based diets on pork quality and finishing pig performance of pigs reared in deep-bedded hoop barns
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