861 research outputs found

    User guide for the GeoScour GB V1 dataset

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    This report describes the BGS GeoScour data product. The methods used to create the component datasets have been critically assessed and its fitness for purpose determined by specialists in BGS. GeoScour looks specifically and only at the geological factors that influence scour and does not consider any hydraulic or hydrodynamic factors. This document outlines the background to why the dataset was created, its potential uses and gives a brief description of the data layers. Technical information regarding the GIS and how the data was created is described and advice is provided on using the dataset

    Nutrition and Feeding of Show Poultry

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    6 pp.The championship potential of a chicken or turkey is determined by genetics, but proper nutrition can help an animal achieve that genetic potential. This publication outlines four principles critical to developing a nutrition program for show broilers and turkeys. Three tables show nutrient requirements for birds at various age

    Incubating and Hatching Eggs

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    16 pp., 3 tables, 3 appendicesThis comprehensive guide provides detailed information on how to maintain quality during incubation to ensure a maximum hatch. The information is applicable to numerous common eggs, from canary eggs to rhea eggs

    Cystic Multiglandular Maternal Hyperparathyroidism Diagnosed by Neonatal Hypocalcemic Seizures

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    A 7-day-old male infant born to a healthy 33-year-old female at 37 weeks of gestation was brought to the local emergency department (ED) with sudden-onset tonic-clonic seizures. Laboratory testing revealed extreme hypocalcemia (ionized calcium of 3.2 mg/dl) and undetectable parathyroid hormone (PTH/ml). Concomitant evaluation of the mother revealed both elevated ionized calcium (5.9 mg/dl) and PTH (116 pg/ml). The mother underwent preoperative ultrasound localization and sestamibi scan, followed promptly by parathyroidectomy. Given the cystic appearance and presence of multiglandular disease, evaluation for familial cystic parathyroid adenomatosis (hyperparathyroidism-jaw bone-tumor syndrome) and MEN 1 were undertaken. The infant was stabilized and discharged home. He returned to the ED with seizures at 1 month of age. After increasing calcium supplementation appropriately, he was monitored with weekly office visits. This represents a unique case of undiagnosed maternal primary hyperparathyroidism manifesting with intrauterine parathyroid suppression and hypocalcemic seizures in the newborn

    Hatching Eggs in the Classroom: A Teacher's Guide

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    12 pp., 2 tables, 1 data chart, lists of resources, references and suppliersScience projects involving eggs and embryos can lay the foundation for studies of the life sciences, introduce scientific methods and promote an appreciation for life. This manual is designed to aid classroom teachers in developing such projects and includes information on every step of the hatching process, from ordering the eggs to caring for the newly hatched chicks. For a companion video, order SP-7

    Introduction: Relationships Between Protected Areas and Sustainable Forest Management: Where are We Heading?

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    The relationship between protected areas and forest management has been one that has often been fraught with conflict. New practices in the forest sector and new ecological insights have led more recently to better co-operation in some regions, although it is debatable to what extent cooperative approaches are desirable. In this introduction to the special section on the relationships between protected areas and sustainable forest management, we outline the history of the forestry and protected areas sectors in Canada, and the evolution of the relationships between them. We define key terms for the debate and offer a novel framework for understanding the relationship between the two sectors as management regimes that occur along parallel continua of sustainability. This framework is contrasted against real-world findings from across Canada, and with examples from elsewhere in the world

    Poultry Q&A

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    6 ppWhy do chickens bob their heads back and forth? How can baby chicks survive without a mother hen? Are fertile eggs more nutritious than nonfertile eggs? Why do chickens and turkeys have white and dark meat? In this publication you'll find the answers to these and other intriguing questions about poultry. Topics include biology, behavior, anatomy, incubation, embryology, products and food safety

    Quaternary Heterogeneities: geospatial products for scientists, industry and decision making

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    Glaciation and permafrost has had a profound impact upon the UK landscape during the Quaternary. Their impact is most relevant within the ‘zone of human interaction’, the surface and near-surface parts of the geological record that humans utilise and exploit for societal and economic gain (e.g. infrastructure development, groundwater, energy, storage and minerals). However, whilst the broad range of glacial and periglacial processes that have affected the UK are known, their spatial influence on the applied properties of the substrate are poorly-understood but have major implications for ground conditions and civil engineering. This lack of understanding is partly due to the complexity of the geological evidence, point or linear approaches to geological investigation and ‘lithostratigraphic’ approaches that have largely-overlooked the significance of heterogeneous products of glaciation and permafrost. Within this project, we are developing a range of national-scale GIS datasets that will highlight the ‘known’ distribution of specific ‘Quaternary Heterogeneities’ in the shallow sub-surface and identify zones of extrapolated susceptibility in areas where data coverage is limited using a series of genetic and geostatistical rules. Spatial data-sets are currently in development for glaciotectonic structure, buried valleys, drift-filled hollows, blockfields and frost weathering. These datasets are aimed at both scientific and applied users (e.g. civil engineers, insurers, hydrogeologists, planners and decision makers), enhancing scientific understanding of glacial and periglacial processes and their spatial influence on the properties of the landscape and sub-surface

    Retrodictively Optimal Localisations in Phase Space

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    In a previous paper it was shown that the distribution of measured values for a retrodictively optimal simultaneous measurement of position and momentum is always given by the initial state Husimi function. This result is now generalised to retrodictively optimal simultaneous measurements of an arbitrary pair of rotated quadratures x_theta1 and x_theta2. It is shown, that given any such measurement, it is possible to find another such measurement, informationally equivalent to the first, for which the axes defined by the two quadratures are perpendicular. It is further shown that the distribution of measured values for such a meaurement belongs to the class of generalised Husimi functions most recently discussed by Wuensche and Buzek. The class consists of the subset of Wodkiewicz's operational probability distributions for which the filter reference state is a squeezed vaccuum state.Comment: 11 pages, 2 figures. AMS Latex. Replaced with published versio

    Spontaneous Reorientation Is Guided by Perceived Surface Distance, Not by Image Matching Or Comparison

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    Humans and animals recover their sense of position and orientation using properties of the surface layout, but the processes underlying this ability are disputed. Although behavioral and neurophysiological experiments on animals long have suggested that reorientation depends on representations of surface distance, recent experiments on young children join experimental studies and computational models of animal navigation to suggest that reorientation depends either on processing of any continuous perceptual variables or on matching of 2D, depthless images of the landscape. We tested the surface distance hypothesis against these alternatives through studies of children, using environments whose 3D shape and 2D image properties were arranged to enhance or cancel impressions of depth. In the absence of training, children reoriented by subtle differences in perceived surface distance under conditions that challenge current models of 2D-image matching or comparison processes. We provide evidence that children’s spontaneous navigation depends on representations of 3D layout geometry.National Institutes of Health (U.S.) (Grant HD 23103
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