1,721,249 research outputs found
SINGLE BUILDING POINT CLOUD SEGMENTATION: TOWARDS URBAN DATA MODELING AND MANAGEMENT
Full text linkTo manage urban areas, a key step is the development of a geometric survey and its subsequent analysis and processing in order to provide useful information, and to become a good basis for urban modeling. Surveys of urban areas can be developed with various technologies, such as Aerial Laser Scanning, Unmanned Aerial Systems photogrammetry, and Mobile Mapping Systems. To make the resulting point clouds useful for subsequent steps, it is necessary to segment them into classes representing urban elements. On the other hand, there are 2D land representations that provide a variety of information related to the elements in the urban environment, which are linked to databases that have information content related to them. In this context, the element identified as interesting for urban management of the built heritage is the individual building unit. This paper presents an automated method for using map datasets to segment individual building units on a point cloud of an urban area. A unique number is then assigned to the segmented points, linking them directly to the corresponding element in the map database. The resulting point cloud thus becomes a container of the information in the map database, and a basis for possible city modeling. The method was successfully tested on the historic city of Sabbioneta (northern Italy), using two point clouds, one obtained through the use of a Mobile Mapping System and one obtained with Unmanned Aerial System photogrammetry. Two cartographic databases were used, one opensource (OpenStreetMap) and one provided by the regional authorities (regional cartographic database)
GEOMATICS in the MANAGEMENT of BUILT HERITAGE through BIM SYSTEMS. The TRAINING of NEW EXPERIENCED PROFESSIONAL FIGURES
Full text linkGeomatics is trying to redefine its role in the Italian higher-level educational system according to the new technological developments. The recent thematic thread of Building Information Modelling (BIM) systems contributes to the new role of Geomatics inside universities and, more generally, in the training process. BIM systems propose new ways of managing the construction process throughout building life cycle, from design to construction and management. They allow managing large flows of information, organized and shared among the different operators in the construction chain, through databases linked to three-dimensional objects. The BIM approach is based on two principles: interoperability and digitization. BIM was born as an application dedicated to new buildings, to promote the optimization of the entire life cycle of the building, from design to management. Many countries have been active in this sector for years, while others are now joining the digitization approach. In this complex scenario, the proposal to adopt the BIM process not only for the management of new constructions but also for the intervention on the existing one, is relevant in a country, like Italy, with a very rich history and a high presence of built historical heritage. Maurice Murphy coined the term HBIM (Historic Building Information Modelling), referring to BIM systems applied to historical buildings that need intervention and subsequent management. Geomatics plays a crucial role in HBIM as it is the primary tool for the digitization of built heritage and to obtain a model of the existing, an "as-built"model. In order to achieve this result, laser scanner and photogrammetry are the main tools, and they are involved in the so-called Scan2Bim process. The other important role is connected with the modeling stage to arrive at a three-dimensional representation suitable for common BIM authoring software while maintaining the rigor and accuracy that characterize the geomatic approach. The fundamental role of Geomatics in this context requires the training of personnel specialized in surveying and managing the acquired data through HBIM systems. There are new training courses and masters in the field of BIM systems, hosted by Politecnico di Milano at the Mantua Campus, aimed at training new figures with a specific curriculum, including Geomatics. The elements that characterize the training course are the knowledge of the principles and methods of data and the evaluation of achievable accuracy and admissible errors. It is also important to address issues that are still not completely solved in HBIM community, such as the type of modeling the best levels of detail of geometric and information content and the most practical aspects of commercial BIM authoring software. The article describes the experience carried out by Politecnico di Milano and tries to define, afterward, the training curriculum for HBIM experts, in which Geomatics plays an essential role, not only in the data acquisition phase but also in geometric and informative modeling
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
Adami a Lebenwaldt ... ... Tractätel/ Von deß Teuffels List und Betrug In den Vier Elementen und vil andern aberglaubischen Dingen ; 3
Full text linkADAMI A LEBENWALDT ... ... TRACTÄTEL/ VON DESS TEUFFELS LIST UND BETRUG IN DEN VIER ELEMENTEN UND VIL ANDERN ABERGLAUBISCHEN DINGEN ; 3
Adami a Lebenwaldt ... ... Tractätl/ Von Deß Teuffels List und Betrng In der Berg-Ruethen Und Berg-Spiegl (-)
Adami a Lebenwaldt ... ... Tractätel/ Von deß Teuffels List und Betrug In den Vier Elementen und vil andern aberglaubischen Dingen ; 3 (3) (1)
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Von deß Teuffels List und Betrug in den 4. Elementen u. a. abergl. Dingen (3)
Anmerckung (143
Adami a Lebenwaldt ...... Tractätl/ Von deß Teuffels List und Betrug In der Waffen-Salben/ Und so genandten Sympathetischen Pulver ; 6
Full text linkADAMI A LEBENWALDT ...... TRACTÄTL/ VON DESS TEUFFELS LIST UND BETRUG IN DER WAFFEN-SALBEN/ UND SO GENANDTEN SYMPATHETISCHEN PULVER ; 6
Adami a Lebenwaldt ... ... Tractätl/ Von Deß Teuffels List und Betrng In der Berg-Ruethen Und Berg-Spiegl (-)
Adami a Lebenwaldt ...... Tractätl/ Von deß Teuffels List und Betrug In der Waffen-Salben/ Und so genandten Sympathetischen Pulver ; 6 (6) (1)
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Von deß Teuffels List und Betrug In der Waffen-Salben ... (3
Adami a Lebenwaldt ... ... Tractätl/ Von deß Teuffels List und Betrug In der Transplantation Oder Uberpflantzung der Kranckheit ; 7
Full text linkADAMI A LEBENWALDT ... ... TRACTÄTL/ VON DESS TEUFFELS LIST UND BETRUG IN DER TRANSPLANTATION ODER UBERPFLANTZUNG DER KRANCKHEIT ; 7
Adami a Lebenwaldt ... ... Tractätl/ Von Deß Teuffels List und Betrng In der Berg-Ruethen Und Berg-Spiegl (-)
Adami a Lebenwaldt ... ... Tractätl/ Von deß Teuffels List und Betrug In der Transplantation Oder Uberpflantzung der Kranckheit ; 7 (7) (1)
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Widmung (3)
Von deß Teuffels List und Betrug In der Transplantation ... der Kranckheit (4
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
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