1,720,967 research outputs found
3D PHOTOGRAMMETRY AS A TOOL FOR CREATING VIRTUAL OUTCROPS AND BUILDING VIRTUAL FIELD EXPERIENCES FOR GEOSCIENCE EDUCATION
No full textGeology field studies are fundamental experiences in geoscience education, providing students the opportunity to see real world examples which reinforce concepts learned in the classroom. However, due to logistics, cost restraints and other factors, field experiences are typically limited to the geographic area surrounding the class. We present a collection of 3D virtual outcrop models from various locations including the US, Iceland, Ireland, and Italy and a simple methodology for creating 3D virtual outcrops using structure from motion photogrammetry. These interactive models can provide students a unique opportunity to remotely visit numerous instructive geologic sites. Virtual outcrops can be a valuable resource for classroom-based activities and combined into educationally-themed virtual field experiences to support various learning goals. Our virtual outcrops can be embedded in web pages or as objects in Google Earth. Users, including those without sight, may even download and render the models in solid form using a 3D printer. These activities offer many of the same educational benefits as traditional field experiences allowing student participants the ability to remotely visit instructive geologic sites from around the world.
The Mid-Atlantic Geo Image Collection (M.A.G.I.C.) has been working to create a massive digital repository of digital geologic material intended for outreach, education and research. Our expansive collection was founded on a suite of ~1400 GigaPan images, but now includes a diverse array of 3D models of outcrops and hand samples. These materials are free and available to everyone for educational or research purposes, including training pre-service teachers. 3D hand samples are created by taking a series of static photos from multiple angles of the sample, and stitched together using Agisoft PhotoScan software. After the model is created, it is then uploaded to the website Sketchfab.com. From there, people can view, download, and embed the models into a website or print with a 3D printer – all for free.
Support for this project comes from the Google Earth for On-site and Distance Education project (GEODE, NSF DUE 1323419)
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Firth Ballad
No full textChristmas drawing near at hand: Rejoice and be merry: A Virgin most pure: Christmas drawing near at hand: Dives and Lazaru
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Firth Ballad
No full textThe black decree: O, see, man's Saviour's in Bethlehem born: On Christmas night, all Christians sin
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