1,721,173 research outputs found
Existing Urban Hyperspectral Reference Data
No full text<p>This dataset supports the publication "Urban Hyperspectral Reference Data Availability and Reuse: State-of-the-Practice Review" DOI: 10.1111/phor.12508. The urban hyperspectral signatures of 9 pre-existing spectral libraries have been converted into .xlsx file formats and organized by material category. This reformatted and compiled dataset is uploaded to this open-source repository to promote FAIR (Findable, Accessible, Interoperable, Reusable) data principles and facilitate data preservation and reuse. </p><p>Here are original sources of this data, they deserve all credit for collecting these spectra and creating these spectral libraries:</p>
<p><a name="_Hlk162691646"></a>Herold, M., Roberts, D. A., Gardner, M. E., & Dennison, P. E. (2004b). Urban Reflectance Spectra from Santa Barbara, CA. [dataset]. <em>Ecological Spectral Information System</em>. <a href="https://ecosis.org/package/urban-reflectance-spectra-from-santa-barbara--ca">https://ecosis.org/package/urban-reflectance-spectra-from-santa-barbara--ca</a> (Accessed June 2024)</p>
<p>Herold, M., & Schurke, J. (2004). Santa Barbara Asphalt Road Spectral Library [dataset]. <em>University of California, Santa Barbara.</em> <a href="http://www.geo-informatie.nl/Projects/Santa_Barbara_Urban_Spectral_Library/urbanspec/roads/sb_road_data.htm">http://www.geo-informatie.nl/Projects/Santa_Barbara_Urban_Spectral_Library/urbanspec/roads/sb_road_data.htm</a> (Accessed June 2024)</p>
<p><a name="_Hlk162691635"></a>Hossler, K., & Kelsey, S. (2017). Urban Materials Spectral Library v1.0 [dataset]. <em>Wright State University. </em><a href="https://corescholar.libraries.wright.edu/spectral_data/1">https://corescholar.libraries.wright.edu/spectral_data/1</a> (Accessed June 2024)</p>
<p><a name="_Hlk162691538"></a>Ilehag, R. (2019). Rebeccailehag/KLUM_LIBRARY: Karlsruhe Library of Urban Materials (KLUM)-A Spectral Library Containing Material Samples and Relevant Metadata. [dataset]. <em>GitHub</em>. <a href="https://github.com/rebeccailehag/KLUM_library">https://github.com/rebeccailehag/KLUM_library</a> (Accessed June 2024)</p>
<p><a name="_Hlk162691546"></a>Kotthaus, S., Smith, T., Wooster, M., & Grimmond, S. (2013). Spectral Library of Impervious Urban Materials [dataset]. <em>Zenodo</em>. <a href="http://doi.org/10.5281/zenodo.4263842">http://doi.org/10.5281/zenodo.4263842</a></p>
<p><a name="_Hlk162691554"></a>NASA. (2018). ECOSTRESS Spectral Library-Version 1.0-ECOSTRESS speclib [dataset]. <em>Jet Propulsion Laboratory.</em> <a href="https://speclib.jpl.nasa.gov/">https://speclib.jpl.nasa.gov/</a> (Accessed June 2024)</p>
<p><a name="_Hlk162691560"></a>Serbin, S., DuBois, S., Jablonski, A., Desai, A., Kruger, E., Townsend, P., (2015). UW-BNL NASA HyspIRI California Airborne Campaign Ground Target Spectra [dataset]. <em>Ecological Spectral Information System (EcoSIS).</em> 10.21232/CDHbHePS. <a href="https://ecosis.org/package/uw-bnl-nasa-hyspiri-california-airborne-campaign-ground-target-spectra">https://ecosis.org/package/uw-bnl-nasa-hyspiri-california-airborne-campaign-ground-target-spectra</a> (Accessed June 2024)</p>
<p><a name="_Hlk162691574"></a>Wyard, C., Marion, R., & Hallot, E. (2023b). Walloon Roof Material (WaRM) Spectral Library (1.0) [dataset]. <em>Zenodo</em>. <a href="https://doi.org/10.5281/zenodo.7414740">https://doi.org/10.5281/zenodo.7414740 </a> </p>
<p>Zambrano-Prado, P., Josa, A., Rieradevall, J., Pérez-Aragüés, F., Marchan, J. F., Gassó-Domingo, S., & Gabarrell, X. (2017). Spectral Library of Rooftop Urban Materials [dataset]<a name="_Hlk162691579"></a>. <em>Universitat Autònoma de Barcelona</em>. <a href="https://ddd.uab.cat/record/196065">https://ddd.uab.cat/record/196065</a> (Accessed June 2024)</p>
<p><a name="_Hlk162692382"></a>Zhang, Y., & Wan, Z. (1999). Modis UCSB Emissivity Library [dataset]. <a href="https://icess.eri.ucsb.edu/modis/EMIS/html/em.html">https://icess.eri.ucsb.edu/modis/EMIS/html/em.html</a> (Accessed June 2024)</p>
Selection, production, and testing of scaled reinforced concrete models and their components
No full textLaefer, Debra F/0000-0001-5134-5322; Erkal, Aykut/0000-0002-1679-7937This paper presents considerations and procedures for the selection, production, and testing of small-scale, reinforced concrete frames to maintain geometric and kinematic similitude. To verify the proposed solutions, 1/10th scaled models were subjected to adjacent excavation-induced settlements in 1-gravity, soil-structure experiments. Material scaling strategies were verified by comparing the resultant surface soil settlements with published studies and by comparing the model building response with numerical simulation, as well as the extent of the damage with previously established thresholds. (C) 2016 Published by Elsevier Ltd.National Science FoundationNational Science Foundation (NSF) [CMMI9713854]; UIUC; Schnabel Foundation CompanyThe experimental work, conducted under the supervision of Dr. James H. Long and Edward J. Cording, was funded by National Science Foundation Grant CMMI9713854 and UIUC and realized through the tireless dedication of several dozen undergraduates. The Schnabel Laboratory was made possible through generous funding by the Schnabel Foundation Company, donated technical assistance of Mr. Keith Brandau of Frauenhoffer Associates, and institutional leadership from Dr. Tony Graziano and David Daniels of UIUC
Soundless chemical demolition agents performance under cold and cool temperatures in concrete and masonry structures
No full textThere are several commonly used traditional demolition methods such asjackhammers, explosives, controlled blasting and diamond wire saws.Unfortunately, these traditional methods produce high levels of noise, vibration anddust. As such, demolition of rocks, existing concrete structures, historic structuresand densely populated areas always raises concerns. In such cases, SoundlessChemical Demolition Agents (SCDAs) offer a reliable alternative. This PhD thesisfocuses on SCDA performance under cold and cool temperatures by means of foursets of experimental work. Across these tests, the relationship between ambienttemperature, heat of hydration, volumetric expansion, calcium hydroxide Ca(OH)2and calcium carbonate (CaCO3) were monitored under different ambienttemperatures and conditions. As a part of these tests, the impact of the thermaltransfer likely to be present during concrete demolition and its effect on thehydration heat development and pressure generation was considered. Resultsindicate that higher ambient temperature results in higher heat of hydration andhigher expansive pressure development. The relationship between ambienttemperature, volumetric expansion and calcium hydroxide Ca(OH)2 generation wasalso investigated. In the last part of this thesis, SCDAs were used for selective andpartial removal of masonry units. The experimental results show that partialremoval was successful, although selective targeted removal of individual masonryunits removal was not possible by hand, despite significant cracking in the area.Check date.issued and date.embargo: Flexible delayed release embargo added by autho
Spatial data storage and processing strategies for urban laser scanning
No full textToday, laser scanning technology offers unprecedented data for a wide range of crucial analysis of the complex urban environment. However, the significant data burden and the data complexity have remained significant impediment to effective data exploration. The latest commercial laser scanning instrument is capable of conducting in excess of a million spatial and temporal measurements every second. Since laser scanning projects are typically deployed over large geographical areas, this results in large and complex datasets that require sophisticated data modelling and indexing strategies to ensure efficient data accessibility. Additionally, such voluminous laser scanning data frequently requires strategic processing strategies to extract semantic information so that they can serve specific demands in various application domains.Given the large and rapidly growing quantities of laser scanning data being produced, many existing laser scanning data handling solutions are quickly losing their viability, thereby requiring new improvements in the field. The first part of this thesis proposes two innovative LiDAR data handling solutions aimed at scalability, data retrieval speed and advanced functionalities. They include a system for discrete point data, called UMG_PC (Urban Modelling Group - Point Cloud), and another data system for full waveform LiDAR data, called UMG_FW (Urban Modelling Group - Full Waveform). Both LiDAR data handling systems are based on a novel hybrid spatial indexing strategy, which combines a two-dimensional indexing structure at a global level and multiple, in-memory three-dimensional indices at a local level so that the entire index adapts to the typical spatial distribution of urban LiDAR datasets. The point cloud database system is highly scalable while simultaneously offering better data retrieval speed compared to the traditional one level indexing solution. In addition, it is also capable of supporting advanced queries, including incremental nearest neighbour search and planar segment selection, which was not previously available in a spatial database. Furthermore, the full waveform data management system, with its capability of supporting spatial and spatial-temporal pulse data retrievals, represents a breakthrough in storage and indexing of full waveform LiDAR data.The second part of the thesis devises several improvements to two challenging topics in LiDAR processing towards automatic urban modelling. The first is the integration of an octree spatial structure into a region growing segmentation algorithm, which vastly accelerates the data processing speed without significantly compromising the output accuracy. In that work, the octree plays multiple roles: (1) data simplification, (2) neighbourhood identification, and (3) data indexing. Additionally, a workflow is proposed for detection of complex urban road networks from a dense aerial point cloud fused with high-resolution aerial imagery data. This includes a novel algorithm that exploits the high variance of slope and height of the point data in the direction orthogonal to the road boundaries. That final study demonstrates an end-to-end LiDAR processing workflow making use of data residing in a database. That study reveals emerging opportunities for detection of small objects from airborne laser data
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
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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