528 research outputs found

    Branchinecta hiberna, a new species of fairy shrimp (Crustacea: Anostraca) from western North America

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    This is the published version. Copyright Brigham Young University, Monte L Bean Life Science MuseauBranchinecta hiberna, a new species of fairy shrimp, is described from temporary pools in the Great Basin region of south central Oregon, northeastern California, and adjacent Nevada. The new species shares several characters with Branchinecta cornigera Lynch, 1958: males bear a similar large patch of small spines on the basal segment of antenna 2, and females bear the similar robust antenna 2 with medial spur, brood pouch shape, and resting egg (cyst) morphology. The new species differs from B. cornigera in the shape of the distal segment of antenna 2 and the number and size of spines on the paired penis warts of males, and in the thoracic spine pattern and lack of dorsal cephalic projections in females. Observations on behavior and ecology of B. hiberna are discussed

    KANT AND LEIBNIZ ON NEGATIVE MAGNITUDES

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    The essay entitled An Attempt to Introduce the Concept of Negative Magnitudes into Philosophy has often (although not always) been interpreted as the sudden eruption of Humeinspired doubts in the middle of Kantā€™s otherwise rationalist projects, and as heralding the view of metaphysics later expressed in Dreams of a Spirit-seer.1 For this reason nearly all the attention given to this work is focused on Kantā€™s final and quite brief General Remark, which constitutes less than one-tenth of the essay. The real heart of the text, however, lies elsewhere, and once this becomes clear it also becomes evident that Hume is really irrelevant to the entire issue. Indeed, what strikes many readers as reminiscent of Hume in the General Remark is nearly a paraphrase of a few passages from Crusiusā€™s famous Dissertatio philosophica de usu et limitibus principii rationis determinantis (1743), and the general tendency of the whole is not essentially different from what is seen in Kantā€™s earlier New Elucidation. The truth of the matter ā€“ or so I will argue in this paper ā€“ is that in this essay Kant actually approaches closer to the original ideas of Leibniz than at any other moment in his career, even closer than did Wolff or his followers. Moreover, I argue that in doing so Kant raises precisely the kinds of difficulties with the Wolffian position on the principle of sufficient reason that, I suspect, Leibniz himself would have raised

    Problems with the Highest Good

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    Alexander Baumgarten on the Principle of Sufficicent Reason

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    This paper defends the Principle of Sufficient Reason, taking Baumgarten as its guide. The primary aim is not to vindicate the principle, but rather to explore the kinds of resources Baumgarten originally thought sufficient to justify the PSR against its early opponents. The paper also considers Baumgartenā€™s possible responses to Kantā€™s pre-Critical objections to the proof of the PSR. The paper finds that Baumgarten possesses reasonable responses to all these objections. While the paper notes that in the absence of a response to Kantā€™s Critical discussion of the PSR (which is omitted here due to limitations of space), this result does not vindicate the principle, it shows how this discussion provides a deeper understanding of what, according to Baumgarten, the PSR really assumes and intends, and prepares the way for a more responsible discussion of Kantā€™s critical objections to Baumgartenā€™s supposed proof.info:eu-repo/semantics/publishedVersio

    Embedded Sensors and Controls to Improve Component Performance and Reliability Conceptual Design Report

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    The objective of this project is to demonstrate improved reliability and increased performance made possible by deeply embedding instrumentation and controls (I&C) in nuclear power plant (NPP) components and systems. The project is employing a highly instrumented canned rotor, magnetic bearing, fluoride salt pump as its I&C technology demonstration platform. I&C is intimately part of the basic millisecond-by-millisecond functioning of the system; treating I&C as an integral part of the system design is innovative and will allow significant improvement in capabilities and performance. As systems become more complex and greater performance is required, traditional I&C design techniques become inadequate and more advanced I&C needs to be applied. New I&C techniques enable optimal and reliable performance and tolerance of noise and uncertainties in the system rather than merely monitoring quasistable performance. Traditionally, I&C has been incorporated in NPP components after the design is nearly complete; adequate performance was obtained through over-design. By incorporating I&C at the beginning of the design phase, the control system can provide superior performance and reliability and enable designs that are otherwise impossible. This report describes the progress and status of the project and provides a conceptual design overview for the platform to demonstrate the performance and reliability improvements enabled by advanced embedded I&C

    Sugar Beet Root Storage Properties Are Unaffected by Cercospora Leaf Spot

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    Ā© 2023 The American Phytopathological Society. This is the accepted manuscript version of an article which has been published in final form at https://doi.org/10.1094/PDIS-09-22-2156-RECercospora leaf spot (CLS; causal agent Cercospora beticola Sacc.) is endemic in many sugar beet production regions due to the widespread distribution of C. beticola and the inability of current management practices to provide complete control of the disease. Roots harvested from plants with CLS, therefore, are inevitably incorporated into sugar beet root storage piles, even though the effects of CLS on root storage properties are largely unknown. Research was conducted to determine the effects of CLS on storage properties including root respiration rate, sucrose loss, invert sugar accumulation, loss in recoverable sucrose yield, and changes in sucrose loss to molasses with respect to CLS disease severity and storage duration. Roots were obtained from plants with four levels of CLS severity in each of three production years, stored at 5Ā°C and 95% relative humidity for up to 120 days, and evaluated for storage characteristics after 30, 90 and 120 days storage. No significant or repeatable effects of CLS on root respiration rate, sucrose loss, invert sugar accumulation, loss in recoverable sucrose yield, or change in sucrose loss to molasses were detected after 30, 90 or 120 days storage regardless of the severity of CLS disease symptoms. Therefore, no evidence was found that CLS accelerates sugar beet storage losses, and it is concluded that roots harvested from plants with CLS can be stored without additional or specialized precaution, regardless of CLS symptom severity.Peer reviewe

    Is it dangerous? The role of an emotional visual search strategy and threatā€relevant training in the detection of guns and knives

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    Counterā€terrorism strategies rely on the assumption that it is possible to increase threat detection by providing explicit verbal instructions to orient people's attention to dangerous objects and hostile behaviours in their environment. Nevertheless, whether verbal cues can be used to enhance threat detection performance under laboratory conditions is currently unclear. In Experiment 1, student participants were required to detect a picture of a dangerous or neutral object embedded within a visual search display on the basis of an emotional strategy ā€˜is it dangerous?ā€™ or a semantic strategy ā€˜is it an object?ā€™. The results showed a threat superiority effect that was enhanced by the emotional visual search strategy. In Experiment 2, whilst trainee police officers displayed a greater threat superiority effect than student controls, both groups benefitted from performing the task under the emotional than semantic visual search strategy. Manipulating situational threat levels (high vs. low) in the experimental instructions had no effect on visual search performance. The current findings provide new support for the languageā€asā€context hypothesis. They are also consistent with a dualā€processing account of threat detection involving a verbally mediated route in working memory and the deployment of a visual template developed as a function of training

    MsFLASH Participantsā€™ Priorities for Alleviating Menopausal Symptoms

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    Objective To describe self-reported menopausal symptom priorities and their association with demographics and other symptoms among participants in an intervention trial for vasomotor symptoms (VMS). Methods Cross-sectional study embedded in the MsFLASH 02 trial, a three-by-two factorial design of yoga vs. exercise vs. usual activity and omega-3-fatty acid vs. placebo. At baseline, women (nā€‰=ā€‰354) completed hot flush diaries, a card sort task to prioritize symptoms they would most like to alleviate, and standardized questionnaires. Results The most common symptom priorities were: VMS (nā€‰=ā€‰322), sleep (nā€‰=ā€‰191), concentration (nā€‰=ā€‰140), and fatigue (nā€‰=ā€‰116). In multivariate models, women who chose VMS as their top priority symptom (nā€‰=ā€‰210) reported significantly greater VMS severity (pā€‰=ā€‰0.004) and never smoking (pā€‰=ā€‰0.012), and women who chose sleep as their top priority symptom (nā€‰=ā€‰100) were more educated (pā€‰ā‰¤ā€‰0.001) and had worse sleep quality (pā€‰<ā€‰0.001). ROC curves identified sleep scale scores that were highly predictive of ranking sleep as a top priority symptom. Conclusions Among women entering an intervention trial for VMS and with relatively low prevalence of depression and anxiety, VMS was the priority symptom for treatment. A card sort may be a valid tool for quickly assessing symptom priorities in clinical practice and research

    An Adaptive Framework for Selecting Environmental Monitoring Protocols to Support Ocean Renewable Energy Development

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    Offshore renewable energy developments (OREDs) are projected to become common in the United States over the next two decades. There are both a need and an opportunity to guide efforts to identify and track impacts to the marine ecosystem resulting from these installations. A monitoring framework and standardized protocols that can be applied to multiple types of ORED would streamline scientific study, management, and permitting at these sites. We propose an adaptive and reactive framework based on indicators of the likely changes to the marine ecosystem due to ORED. We developed decision trees to identify suites of impacts at two scales (demonstration and commercial) depending on energy (wind, tidal, and wave), structure (e.g., turbine), and foundation type (e.g., monopile). Impacts were categorized by ecosystem component (benthic habitat and resources, fish and fisheries, avian species, marine mammals, and sea turtles) and monitoring objectives were developed for each. We present a case study at a commercial-scale wind farm and develop a monitoring plan for this development that addresses both local and national environmental concerns. In addition, framework has provided a starting point for identifying global research needs and objectives for understanding of the potential effects of ORED on the marine environment
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