1,721,073 research outputs found
Identifying success factors for integrated coastal zone management:Development of a regional coastal plan in Morocco
No full textIntegrated coastal zone management (ICZM) is a policy framework that aims to achieve sustainable development in the context of limited space and resources of (densely populated) coastal areas, by balancing environmental protection, societal needs, and economic development. In this paper, we first reflect on key components influencing the success of ICZM. Second, we compare our understanding to the process of preparation of a coastal plan for the Tangier-Tetouan-Al Hoceima region in Morocco. Finally, we extend and generalize our conclusions to ICZM as a relevant policy framework, by identifying factors that influence the context-specific interpretation of ICZM in Morocco. We argue that ICZM depends on the integration, implementation, coordination between science and policy, and appropriate governance. In the Moroccan case, a variety of institutions first need to agree on the governance structure and priorities, as a base for a clear direction for the regional ICZM. This calls for a change of stakeholder engagement for certain steering institutions and leadership by ‘wilaya’. The coastal plan preparation process showed a lack of balance between stakeholder participation and institutional coordination, and increased bureaucratization which covers accountability for decision-making. Although coastal governance is supported by the national government, it is still unknown to what extent it is supported at the regional level which oversees the ICZM. We conclude that besides leadership, political support, and institutional commitment, broader stakeholder engagement is crucial for the decisions that shape the future of the coastal zone, which indicates that governance is the most important success factor for ICZM.</p
Morphometry of terrestrial shield volcanoes
Full text linkShield volcanoes are described as low-angle edifices built primarily by the accumulation of successive lava flows. This generic view of shield volcano morphology is based on a limited number of monogenetic shields from Icelandand Mexico, and a small set of large oceanic islands (Hawaii, Galápagos). Here, the morphometry of 158 monogenetic and polygenetic shield volcanoes is analyzed quantitatively from 90-meter resolution SRTM DEMs using the MORVOLC algorithm. An additional set of 24 lava-dominated ?shield-like? volcanoes, considered so far as stratovolcanoes, are documented for comparison. Results show that there is a large variation in shield size (volumes from 0.1 to >1000 km3), profile shape (height/basal width (H/WB) ratios mostly from 0.01 to 0.1), flank slope gradients (average slopes mostly from 1° to 15°), elongation and summit truncation. Although there is no clear-cut morphometric difference between shield volcanoes and stratovolcanoes, an approximate threshold can be drawnat 12° average slope and 0.10 H/WB ratio. Principal component analysis of the obtained database enables to identify four key morphometric descriptors: size, steepness, plan shape and truncation. Hierarchical cluster analysis ofthese descriptors results in 12 end-member shield types, with intermediate cases defining a continuum of morphologies. The shield types can be linked in terms of growth stages and shape evolution, related to (1) magma composition and rheology, effusion rate and lava/pyroclast ratio, which will condition edifice steepness; (2) spatial distribution of vents, in turn related to the magmatic feeding system and the tectonic framework, which will control edifice plan shape; and (3) caldera formation, which will condition edifice truncation.Fil: Grosse, Pablo. Fundación Miguel Lillo. Dirección de Geología. Instituto de Minerología y Petrografia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaFil: Kervyn, Matthieu. Vrije Universiteit Brussel; Bélgic
Supplemental Material, SPPS715070_suppl_mat - Studying the Cognitive Map of the U.S. States: Ideology and Prosperity Stereotypes Predict Interstate Prejudice
No full textSupplemental Material, SPPS715070_suppl_mat for Studying the Cognitive Map of the U.S. States: Ideology and Prosperity Stereotypes Predict Interstate Prejudice by Alex Koch, Nicolas Kervyn, Matthieu Kervyn, and Roland Imhoff in Social Psychological and Personality Science</p
Assessing Performance of the RSTVOLC Multi-Temporal Algorithm in Detecting Subtle Hot Spots at Oldoinyo Lengai (Tanzania, Africa) for Comparison with MODLEN
Full text linkThe identification of subtle thermal anomalies (i.e., of low-temperature and/or spatial
extent) at volcanoes by satellite is of great interest for scientists, especially because minor changes
in surface temperature might reveal an unrest phase or impending activity. A good test case for
assessing the sensitivity level of satellite-based methods is to study the thermal activity of Oldoinyo
Lengai (OL) (Africa, Tanzania), which is the only volcano on Earth emitting natrocarbonatite lavas
at a lower temperature (i.e., in the range 500–600 C) than usual magmatic surfaces. In this work,
we assess the potential of the RSTVOLC multi-temporal algorithm in detecting subtle hot spots at OL
for comparison with MODLEN: A thermal anomaly detection method tailored to OL local conditions,
by using Moderate Resolution Imaging Spectroradiometer (MODIS) data. Our results investigating
the eruptive events of 2000–2008 using RSTVOLC reveal the occurrence of several undocumented
thermal activities of OL, and may successfully integrate MODLEN observations. In spite of some
known limitations strongly affecting the identification of volcanic thermal anomalies from space
(e.g., cloud cover; occurrence of short-lived events), this work demonstrates that RSTVOLC may
provide a very important contribution for monitoring the OL, identifying subtle hot spots showing
values of the radiant flux even around 1 MW
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Morphometric classification and spatial distribution of Philippine volcanoes
Full text linkThe Philippine Island Arc has a large number of volcanoes with diverse morphologies, making it an ideal location to study the factors controlling the morphology and spatial distribution of island arc volcanoes. We have identified 731 volcanic edifices using the SRTM 30 m digital elevation model, and computed their quantitative morphology using the MORVOLC algorithm. Hierarchical classification by principal component (PC) analysis distinguishes four volcano types: small flat cones, small steep cones, large cones, and massifs, with mean volumes of 0.2 km3 (<6.2 km3), 0.4 km3 (<9 km3), 29 km3 (0.15–178 km3), 267 km3 (76–675 km3), mean heights of 125 m (16–721 m), 260 m (53–971 m), 842 m (59–2313 m), 1533 m (1012–2175 m), and mean slopes of 13° (3–21°), 22° (14–37°), 15° (3–28°), 15° (11–22°), respectively. This classification is based mainly on their size and irregularity (PC1) and steepness (mean slope and height/basal width ratio; PC2), and to a lesser extent on the size of the summit region and edifice truncation (PC3) and edifice elongation (PC4). These morphological volcano classes represent stages along an evolutionary trend. The small flat cones are mostly monogenetic, whereas the small steep cone class represents an early growth stage. Some can develop into large polygenetic cones while a few can further grow laterally into massifs, both of which are preferentially found on thickened crust. There is a trend towards more silicic compositions from small to large cones, perhaps due to larger edifice loads preventing mafic dykes from reaching the surface. The distribution and alignment of the edifices within volcanic fields seems to be influenced by both regional and local stress fields and pre-existing structures.Fil: Paguican, Engielle Mae. Vrije Unviversiteit Brussel; Bélgica. Caraga State University; FilipinasFil: Grosse, Pablo. Fundación Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaFil: Fabbro, Gareth N.. Earth Observatory Of Singapore; Singapur. Caraga State University; FilipinasFil: Kervyn, Matthieu. Vrije Unviversiteit Brussel; Bélgic
Variations on the Author
Full text link“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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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