1,725,567 research outputs found

    Monitoring the conservation status of Habitat 9210* “Apennine beech forests with Taxus and Ilex” in Apulia - Preliminary results of an integrated analysis -

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    Apulian beech forests are mostly ascribed (DGR_2442_2018) to Habitat 9210* “Apennine beech forests with Taxus and Ilex” and distributed almost totally (99.4 %) in 3 sites of Community importance IT9110004 and IT9110030, in Gargano and IT9110003, in Sub Apennine Dauno). The nuclei of Habitat 9210* located in Gargano are included in the Gargano National Park and in the State Reserve "Foresta Umbra". This habitat in Apulia covers about 38 km2, and while representing about 2.6 % of the area covered by the Habitat in the Mediterranean biogeographical region, it is of high ecosystem and conservation value in terms of floristic-vegetational and phytogeographical peculiarities. The monitoring was aimed at verifying, at regional, sub-regional and local scales, the conservation status of Habitat 9210* according to the requirements of the Directive 42/93/CEE. In this contribution, the results of analyses conducted at the local scale are presented. These analyses were based on data from ground survey campaigns carried out between July 2022 and June 2024, (autumn-winter and spring-summer) in Habitat *9210 polygons with an area greater than 5000 m2, distributed within six forest complexes (Foresta Umbra, Carpino-Ischitella, Monte Spigno, San Marco in Lamis, in Gargano, and Sub-Appennino Dauno). Following the verification and cartographic restitution of the polygon perimeters, a multistage random sampling procedure was applied to identify of 35 points procedure within the ISPRA 1 x 1 km cells, for the establishment of circular test areas. These were structured in two concentric circumferences (0.05 and 3.14 ha) for the differential survey of all the mandatory and suggested parameters for forest habitats by the Manual for Habitat Monitoring and the National Monitoring Plan for Terrestrial and Inland Waters Species and Habitats, as well as other parameters to integrate other useful information into the monitoring, in order to assess and connect with the analyses conducted at the regional and sub-regional scales. In the smaller area, the following parameters were assessed: site attributes, structural (DBH ≥ 2 cm), and phytosanitary parameters, total and single-layer ground cover, ground and standing necromass, forest humus form, and the vegetation survey was conducted. In the largest area, floristic surveys were carried out in addition to the assessment of geomorphological aspects, the presence of refuge habitats, environmental homogeneity, accessibility, disruption factors, damage, constraints and obstacles to interventions, road conditions, evidence of silvicultural interventions, the presence of charcoal barrens, as well as the presence and abundance of Taxus baccata and Ilex aquifolium, target species for Habitat *9210 and invasive alien species according to the official national list of invasive alien species. The results indicate significant diversification between different forest complexes, but common problems also emerge at the level of specific compartments. The lack of juvenile development stages, the uniformity of management practices and the almost complete disregard of forest planning are causing the progressive ageing of the tree component. This seems to cause a substantial structural, biological homogenisation of these coenoses and their forest landscapes. The analysis of floristic-vegetation data and the study of forest humus, in particular, confirms what was hypothesised/theorised in the past. Namely, the presence of characteristic turkey oak species, consistent with literature data, suggests that in the absence of appropriate management, even without considering climate change, beech forests could shrink to much smaller nuclei, in favour of turkey oak vegetation series. To counteract this trend, forest planning with specific, well-defined objectives and climate-smart management oriented towards maintaining the biodiversity peculiar to these rear edge beech forests appears necessary

    Linked collectors and determiners for: The Albert J. Cook Arthropod Research Collection.

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    Natural history specimen data linked to collectors and determiners held within, "The Albert J. Cook Arthropod Research Collection". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/76525e81-9210-401d-a90d-5509f771c0e7">https://bionomia.net/dataset/76525e81-9210-401d-a90d-5509f771c0e7</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/76525e81-9210-401d-a90d-5509f771c0e7">https://gbif.org/dataset/76525e81-9210-401d-a90d-5509f771c0e7</a>. Formatted as a Frictionless Data package

    Linked collectors and determiners for: The Albert J. Cook Arthropod Research Collection.

    No full text
    Natural history specimen data linked to collectors and determiners held within, "The Albert J. Cook Arthropod Research Collection". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/76525e81-9210-401d-a90d-5509f771c0e7">https://bionomia.net/dataset/76525e81-9210-401d-a90d-5509f771c0e7</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/76525e81-9210-401d-a90d-5509f771c0e7">https://gbif.org/dataset/76525e81-9210-401d-a90d-5509f771c0e7</a>. Formatted as a Frictionless Data package

    0-6686: Improving DMS 9210 Requirements for Limestone Rock Asphalt

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    Summary sheet describing research performed by the Texas A&M Transportation Institute regarding improvements in DMS 9210 requirements for Limestone Rock Asphalt

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Variations on the Author

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    “Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship

    Improving DMS 9210 requirements for limestone rock asphalt - final report.

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    PDFTech ReportFHWA/TX-15/0-6686-2Project 0-6686LimestoneAsphalt mixturesSpecificationsField testsLaboratory testsWorkabilityAcceptance testsPavement maintenancePatchingCold mix paving mixturesTexasTexas A&M Transportation InstituteEstakhri, CindyKassem, EmadArambula, EdithScullion, TomTexas A&M Transportation InstituteTexas. Dept. of Transportation. Research and Technology Implementation OfficeUnited States. Federal Highway AdministrationUS Transportation CollectionLimestone Rock Asphalt (LRA) mixtures have been produced and placed for several decades usingspecification requirements currently listed under DMS 9210. Several districts have had placement issuesand premature failures at the beginning of 2010. These issues and failures have been attributed to materialproperties. Requirements for DMS 9210 have not changed for several years and need to be evaluated topossibly produce a higher quality material to reduce the occurrence of premature failures and to minimizeplacement issues. The objectives of the study are to (1) evaluate specification requirements of Item 330 andDMS 9210, (2) conduct field evaluations and lab testing to determine workability and acceptability asstockpile material for use as needed in pavement maintenance, and (3) consider improvements to thespecification requirements to ensure an acceptable and workable stockpile material for up to 6 months.The Hveem stability was determined to be a good indicator of rutting resistance of LRA but it does notindicate when a mix is too dry and susceptible to raveling. The Cantabro test was able to identify drymixtures with insufficient flux oil as well as poor quality flux oil.A Cantabro loss of 15 percent maximum is being proposed as a new specification test and limi

    Appropriate Similarity Measures for Author Cocitation Analysis

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    We provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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