2,031 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
7.33 Semiarid Hillslope Processes
No full textSemiarid environments show specific hydrological responses and geomorphological processes. Semiarid environments are characterized by dry conditions that do not allow for a full but, instead, only for a partial vegetation cover. The vegetation cover is generally patterned in a heterogeneous mosaic of vegetation patches and bare interpatches. This pattern highly influences geomorphologic processes on semiarid hillslopes. These patterns are not static, and a mutual interaction exists between geomorphologic processes and vegetation. At the bare interpatches, runoff is generated, and water is infiltrated into the vegetated areas.The spatial patterns of the bare patches, as well as the variation in the bare surface conditions (such as initial soil-moisture conditions, slope length and angle, crust types, and rock fragment cover), determine their geomorphic response. On the other hand, the vegetation pattern and density determines the connectivity, runoff, and geomorphologic response at the hillslope scale. Changes in these patterns because of land-use change, grazing, or climate change will affect the vegetation cover pattern and hence connectivity and the geomorphologic response as expressed by erosion and sedimentation patterns at the hillslope.<br/
Fabrieksschema betreffende de "Bereiding van Magnesium uit Zeewater": Deel I
No full textDocument(en) uit de collectie Chemische Procestechnologie Deel II zie: Deeg, J.F., Chemical Process Design 1101DelftChemTechApplied Science
Beatty, J.F., and the Law of Manslaughter
No full textIn this article, the author argues that the recent Supreme Court of Canada decisions in R. v. Beatty and R. v. J.F. have clarified several of the issues that have plagued the increasingly complicated offence of manslaughter. In particular, the decisions address the redundancy among the many manslaughter provisions in the Criminal Code, the need to define a clear separation between actus reus and mens rea, and the need to establish distinct categories of objective fault for different types of manslaughter offences. The author examines the legal background of these decisions as well as the current state of the law. He concludes by identifying emerging issues relating to the offence of manslaughter, arguing that the law remains convoluted and in need of urgent reform despite the progress made in the Beatty and J.F. decisions
7.05 - Remote sensing of aeolian processes
No full textThis review focuses on recent advances that have taken place in the use of remote sensing to observe aeolian processes, and to highlight recent approaches that have enabled and been employed to observe and quantify aeolian processes at a range of scales. As remote technologies continue to develop, the review emphasizes the significance that, in their different forms, these data are applicable across all scales at which aeolian processes operate. To address this, the review examines a range of space-borne, airborne and near-surface technologies
7.28 Numerical modeling of flows and falls
No full textA wide range of programs used to model mass movements currently exist. In this chapter, we provide an overview by presenting a selection of approaches used for modeling flows (e.g., debris flows and hyperconcentrated flows) and falls (e.g., rockfall). Mass-movement models support the study of geomorphic landscape changes, and, probably more importantly, they are commonly used for natural hazard assessments in mountain areas. As a first approach, the energy-line principle is widely applied, but not all flow and fall processes can be simulated with this rather simple method. Therefore, dynamic, process-based models have been developed, each one adapted to specific mass-movement problems. The energy-line principle is explained and models based thereon as well as modeling problems presented. Then, models and modeling approaches are introduced, which are used to describe mass flows with equations of motion and continuity. Rockfall is commonly modeled by trajectory models, which are explained theoretically and illustrated with an applied example. This state-of-the-art chapter on numerical modeling of flows and falls is followed by a discussion on future challenges in mass-movement modeling
Bouwen aan de delta: Gerealiseerde waterbouwkundige werken, Inzendingen prof. dr. ir. J.F. Agemaprijs 2015
No full textDe afgelopen jaren (2010 - 2015) zijn er in Nederland vele in het oog springende waterbouwkundige projecten gerealiseerd. Aansprekende voorbeelden betreffen onder meer Maasvlakte 2, de Zandmotor, de ontpoldering van de Noordwaard en de omlegging van de Zuid-Willemsvaart. Ook in de lokale watersystemen zijn diverse interessante projecten gebouwd. Veel van deze projecten hebben zich aangemeld voor de prof. dr. ir. J.F. Agemaprijs, dé prijs voor het beste en meest innovatieve waterbouwkundige project dat daadwerkelijk gebouwd is. Dit boek toont foto’s en projectinformatie, en bevat achtergrondinformatie over de Agemaprijs en essays van experts. De verschillende projecten geven een fraai beeld van de veelzijdigheid en innovativiteit van de Nederlandse (water)bouwers. Het boek geeft inzicht in de huidige en toekomstige manier waarop deltagebieden kunnen worden ingericht.Delft University of Technolog
Business And Agriculture
No full textPhotograph used for a story in the Daily Oklahoman newspaper. Caption: "Harper Sibley is shown above, center, discussing points of interest in his address with Dan Hogan, right, chairman of the city chamber's natural resources division, and J.F. Owens, national chamber director, who is traveling with the Sibley party.
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