2,809 research outputs found

    Meteoritic Material Recovered from the 07 March 2018 Meteorite Fall into the Olympic Coast National Marine Sanctuary

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    On 07 March 2018 at 20:05 local time (08 March 03:05 UTC), a dramatic meteor occurred over Olympic Coast National Marine Sanctuary (OCNMS) off of the Washington state coast (OCNMS fall, henceforth). Data to include seismometry (from both on-shore and submarine seismometers), weather radar imagery (Figure 1), and a moored weather buoy, were used to accurately identify the fall site. The site was visited by the exploration vessel E/V Nautilus (Ocean Exploration Trust) on 01 July 2018 [1] and by the research vessel R/V Falkor (Schmidt Ocean Institute) from 03-06 June 2019. Remotely operated vehicles (ROVs) from both vessels were used to search for meteorites and sample seafloor sediments. These expeditions performed the first attempts to recover meteorites from a specific observed fall in the open ocean. Analysis of weather radar data indicates that this fall was unusually massive and featured meteorites of unusually high mechanical toughness, such that large meteorites were disproportionately produced compared to other meteorite falls (Figure 2)[2-4]. We report the recovery of many (>100) micrometeorite-sized melt spherules and other fragments, and one small (~1mm3 ) unmelted meteorite fragment identified to date. Approximately 80% of the fragments were recovered from a single sample, collected from a round pit in the seafloor sediment. Melt spherules are almost exclusively type I iron-rich spherules with little discernible oxidation. Analyses are currently underway to attempt to answer the primary science question by identifying the parent meteorite type. Also, differences in the number and nature of samples collected by Nautilus and Falkor reveal a distinct loss rate to oxidation over the 15 months following the fall that is useful to inform future recovery efforts

    Behavioral correlates between daily activity and sociality in wild and captive origin African lions

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    Study of behavioral correlations within and across populations has long been of interest to ethologists. An exploration of behavioral correlations between sociality and behavior of African lions (Panthera leo) was undertaken to examine if this approach is better able to reveal important aspects of lion behavior not easily discernible by looking at these behaviors separately. Resting behavior and received play interactions were correlated in 2 captive-origin prides and one wild pride, attributable to the involvement of cubs and sub-adults. Direct and exploratory movement was negatively correlated with groom centrality in 2 of the 3 prides, due to adults engaging in high levels of both of these activities. Exploration of these behavioral correlations highlighted the differences between age-groups in activity and sociality, facilitating the understanding of the complex behavior and interactions of lions. In addition, the finding of similar behavioral correlations between captive-origin and the wild prides provides confidence in the suitability if captive-origin candidates for ex-situ release. This is imperative to ensure the success of sub-groups and prides under an ex-situ reintroduction program

    A New Evidentiary Standard for Criminal Appellate Review: Clewis v. State

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    In Clewis v. State, the Texas Court of Criminal Appeals finally addressed the conflict regarding proper appellate review of factual sufficiency of the evidence. The Clewis decision adopted Stone and established, for the first time since the 1981 amendments, the constitutional power and duty of the courts of appeals to review the factual sufficiency of the evidence in appropriate cases. In attempting to predict the effect of Clewis on review of noncapital criminal cases in the courts of appeals and death penalty Cases in the Texas Court of Criminal Appeals, this article examines the historical precedents of selected civil cases reversed for factual insufficiency. Also discussed are potential conflicts and the appropriate standard for review. Although defendants after Clewis may raise the issue of factual sufficiency in the courts of appeals, the court in Clewis did not address whether the court of criminal appeals has the authority to conduct such a review. Thus, there could be problems for defendants whose cases come under the Texas Court of Criminal Appeal\u27s original jurisdiction for capital murder and habeas corpus

    Consumer Attitudes towards Sustainability Attributes on Food Labels

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    Concerns about climate change and the general status of the environment have increased expectation that food products have sustainability credentials, and that these can be verified. There are significant and increasing pressures in key export markets for information on Greenhouse gas (GHG) intensity of products throughout its life-cycle. How this information is conveyed to consumers is a key issue. Labelling is a common method of communicating certain product attributes to consumers that may influence their choices. In a choice experiment concerning fruit purchase decisions, this study estimates willingness to pay for sustainability attributes by consumers in Japan and the UK. The role of label presentation format is investigated: text only, text and graphical, and graphical only. Results indicate that sustainability attributes influence consumers’ fruit purchase decisions. Reduction of carbon in fruit production is shown to be the least valued out of sustainability attributes considered. Differences are evident between presentation formats and between countries, with increased nutrient content being the most sensitive to format and country while carbon reduction is the most insensitive and almost always valued the least.Willingness to pay, Choice experiment, Food labelling, Sustainability, Cross-country comparison, Agricultural and Food Policy, Consumer/Household Economics, Environmental Economics and Policy, Food Consumption/Nutrition/Food Safety, Q18, Q51, Q56,

    Photometric validation of a model independent procedure to extract galaxy clusters

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    By means of CCD photometry in three bands (Gunn g, r, i) we investigate the existence of 12 candidate clusters extracted via a model independent peak finding algorithm (\cite{memsait}) from DPOSS data. The derived color-magnitude diagrams allow us to confirm the physical nature of 9 of the cluster candidates, and to estimate their photometric redshifts. Of the other candidates, one is a fortuitous detection of a true cluster at z~0.4, one is a false detection and the last is undecidable on the basis of the available data. The accuracy of the photometric redshifts is tested on an additional sample of 8 clusters with known spectroscopic redshifts. Photometric redshifts turn out to be accurate within z~0.01 (interquartile range).Comment: A&A in pres

    The Keystone Project: A Cooperative In-Service Program

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    Since receiving a federal grant in November 1985, 25 Keystone area educators have been working with AEA 1 consultants and University of Iowa science education specialists to expand the use of investigative activities in the science studies of Iowa students. The published results of their work, 27 units adaptable to upper elementary and junior high classes, are now available to other interested teachers. The following article by the project leaders (1) explains the workshop plan and purposes employed by the project participants, (2) describes the focus and creation of their final products, a repertoire of new science units, and (3) lists the units now available and information on obtaining them

    Nanoliter-scale, regenerable ion sensor: Sensing with surface functionalized microstructured optical fiber

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    Femtosecond laser written Bragg gratings have been written in exposed-core microstructured optical fibers with core diameters ranging from 2.7 ÎĽm to 12.5 ÎĽm and can be spliced to conventional single mode fiber. Writing a Bragg grating on an open core fiber allows for real-time refractive index based sensing, with a view to multiplexed biosensing. Smaller core fibers are shown both experimentally and theoretically to provide a higher sensitivity. A 7.5 ÎĽm core diameter fiber is shown to provide a good compromise between sensitivity and practicality and was used for monitoring the deposition of polyelectrolyte layers, an important first step in developing a biosensor.Sabrina Heng, Mai-Chi Nguyen, Roman Kostecki, Tanya M. Monro and Andrew D. Abellhttp://spie.org/app/program/index.cfm?fuseaction=conferencedetail&conference_id=1081415&event_id=102223

    Architectural Design of The University Honors Oasis

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    As the University Honors Program continues to expand, a need for a new space has developed. In working with the faculty and students of the UHP, I have designed a new Honors building for campus. Included are architectural design drawings, renderings, and a design description
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