1,721,496 research outputs found
The Role of Participatory Village Maps in Strengthening Public Participation Practice
No full textThe data was collected in January-March 2020. I attended the Musrenbang meeting and ask the participants to fill a questionnaire. After that, in other days, I interviewed several participants in an in-depth semi structure interview. The data was analyzed and then used for a publication at MDPI ISPRS International Journal of Geo-Information
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
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
Fixed point results in cone metric spaces for contractions of Zamfirescu type
No full textWe prove a result on points of coincidence and common fixed points in cone metric spaces for two self mappings satisfying a weak generalized contractive condition of Zamfirescu type. We deduce some results on
common fixed points for two self mappings satisfying a weak contractive type condition. These results generalize some well-known recent results
A hydro‐mechanically‐coupled XFEM model for the injection‐induced evolution of multiple fractures
Full text linkIn this paper, a two-dimensional eXtended Finite Element Method (XFEM) solution is presented for the hydro-mechanically coupled hydro-frac-induced propagation of multiple fractures in rocks. Fractures are considered one-dimensional objects, and the rock matrix is regarded as a two-dimensional medium. Rules for improving the accuracy of the solution are included to deal with the transfer of variables between fractures and matrix in the coupling process. The main variables include fluid pressure and fracture aperture. The following assumptions are made: (1) the fluid pressure inside a fracture is applied as a net pressure; (2) fluid leak-off is ignored; (3) the fluid front is regarded as a fracture front provided that the area of fluid lag has a small effect on fracture propagation compared to the area at which the fluid pressure is applied. The fluid flow is governed by the lubrication equation, while the XFEM is used to describe the behaviour of the elastic medium. The simulation results are compared with analytical solutions for a single hydraulic fracture model to verify and validate the proposed algorithm. A simulation with multiple hydraulic fractures is also performed to investigate the interference effect of multiple fractures and fracture propagation. The shadow effect caused by multiple fractures is analysed to manifest the stress variation along the propagation path
Application of remote sensing methods for discrimination of surficial sand types in Qatar oeninsula, the Arabian Gulf
No full textThe main objective of this work was to investigate the effectiveness of digital processing of Landsat-5 TM data in producing high-quality images for mapping various surficial sand types based on their spectral signatures. To achieve this objective, Landsat-5 TM imagery data were acquired from two dates, one in February 1987 and the other in June 1990. These data were processed on a SUN 4/260 workstation using ERDAS 7.5 software. The applied image processing techniques include preprocessing for radiometric and geometric correction, various enhancement methods, classification and accuracy assessment. A Geographic Information System (GIS) was used to compile data captured and reduced from Landsat TM imagery analysis, together with data from other sources. Spectral measurement of selected surficial sand types was carried out in four different areas of Qatar. These are the western area, the northern tip, the northeastern coast and the southeastern coast. One hundred and forty measurements of spectral reflectances were recorded in the field for various sediment exposures representing the main sand types in the four study areas. From these sand types 53 representative samples were collected for laboratory investigations. These samples were subjected to grain size analyses, X-ray diffraction and laboratory measurement of spectral reflectances. Successful, accurate and detailed geological mapping of these Quaternary sands was achieved by use of a set of diverse false-color composite (FCC) images and by principal component (PC) analysis and image classification. The use of a three-band combination of six non-thermal TM bands indicates that the combination of a visible band (1 or 3), near and mid-infrared bands provides the best discrimination of sand classes. The outcrop of ancient rock types is also revealed. Thus, the results of the remote sensing studies are interpreted in the light of the geologic and tectonic setting of Qatar Peninsula. The work revealed that the surficial aeolian sands can be categorized into three main types, namely-(i) sabkha-derived, salt-rich quartz sands, (ii) beach-derived, calcareous sand and (iii) quartz-rich dune sands. Each of these types has a specific spectral signature affected by the mineralogical composition, grain size, erosional maturity and the mode of occurrence. Such results could be useful to discriminate other surficial deposits in similar environmental conditions prevailing in and lands.</p
Analysis of Interaction of Multiple Cracks Based on Tip Stress Field Using Extended Finite Element Method
Full text linkA new method is presented to study the interaction of multiple cracks, especially for the areas near crack tips by using the extended finite element method. In order to track the cracks, a new geometric tracking technique is proposed to track enriched elements and nodes along the crack instead of using the narrow band level set method. This allows to accurately determine enriched elements and nodes and calculate enrichment values. A method is proposed for constructing a multicrack matrix, which involves numbering enriched nodes of multiple cracks and solving the global stiffness matrix. In this approach, the stress fields around multiple cracks can be studied. The interaction integral method is employed to study the crack propagation and its direction by calculating the stress intensify factor. The developed model has been coded in MATLAB environment and validated against analytical solutions. The application of the model in the crack interaction study is demonstrated through a number of examples. The results illustrate the influence of the interaction of multiple cracks as they approach each other
Massive arthrofibrosis of the knee joint after carbon fibre rod (pad/scaffold) implantation. Two cases
No full textIn the treatment of cartilage damage the use of carbon rods is getting more and more popular. The papers are promising. There are no reports about significant complications. The following cases show a post operative enormous increasing discomfort
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