Página 1 dos resultados de 1526 itens digitais encontrados em 0.009 segundos

Preservação da memória da Rádio da UFRGS : vozes que contam, cantam e encantam

Costa, Janise Silva Borges da
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Trabalho de Conclusão de Curso Formato: application/pdf
POR
Relevância na Pesquisa
26.92%
Este estudo propõe a digitalização do acervo de entrevistas da Rádio da UFRGS, o qual reúne depoimentos de pesquisadores, historiadores, escritores, políticos, atores, cantores e músicos de renome nacional e internacional e abrange os mais variados temas. Enfatiza a importância da adoção de normas e padrões internacionais, observada em todas as etapas do processo, visando garantir, sobretudo, a preservação de longo prazo e a interoperabilidade entre sistemas. Considerando o valor histórico, social e cultural deste patrimônio salienta-se como principais norteadores da proposta apresentada a relevância e o compromisso de preservação da memória institucional para as próximas gerações, sua ampla divulgação e disponibilização para acesso livre. São documentos sonoros únicos, produção intelectual da Universidade, que caracterizam épocas e transmitem idéias, pensamentos, emoções e ideais que precisam ser preservados e tornados públicos. O acervo está gravado em fitas de rolo e cassete, armazenado em condições físicas e ambientais que comprometem sua integridade, além do processo de degradação natural a que estão submetidas as referidas mídias, seja pelo manuseio ou pelo tipo de material utilizado na sua fabricação. Aborda aspectos da preservação do conteúdo do arquivo de vozes...

Digitalização de acervos em bibliotecas nacionais: uma análise comparativa dos critérios dos projetos das bibliotecas nacionais de Portugal e da Espanha

Chaves, Carla Vieira
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Trabalho de Conclusão de Curso Formato: application/pdf
POR
Relevância na Pesquisa
27.07%
Este trabalho baseou-se em estudos de Digitalização de Documentos e teve como objetivo comparar os projetos de digitalização das Bibliotecas Nacionais da Espanha e de Portugal, uma vez que são países com bons referenciais na área de estudos e possuem proximidade cultural e histórica com o Brasil. De forma específica, levanta e avalia os projetos das instituições de acordo com os requisitos identificados a partir da literatura da área. Utiliza uma metodologia de caráter descritivo com uma abordagem qualitativa. Constrói como instrumento de análise dos projetos, critérios e elementos levantados a partir de referências na área de digitalização, utilizadas como embasamento teórico na pesquisa. Detecta que grande parte dos critérios são atendidos pelas instituições, que possuem muitas semelhanças referentes às características dos projetos, tais como metadados e formatos de representação dos arquivos digitais. Conclui que os projetos atendem aos requisitos analisados em sua maioria. Propõe projetos futuros que dêem enfoque para uma projeção nacional desses critérios, juntamente com especialistas da área de informática.; This work is on digitization studies compares the digitization projects of National Library of Spain and National Library of Portugal...

Effect of digitization parameters on periapical radiographic image quality with regard to anatomic landmarks

Gonçalves, Andréa; Nícoli, Giovanni Antonio; Zamperini, Camila Andrade; Hebling, Josimeri; Gonçalves, Marcelo
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 25-29
ENG
Relevância na Pesquisa
26.92%
The aim of this study was to evaluate the influence of digitization parameters on periapical radiographic image quality, with regard to anatomic landmarks. Digitized images (n = 160) were obtained using a flatbed scanner with resolutions of 300, 600 and 2400 dpi. The radiographs of 2400 dpi were decreased to 300 and 600 dpi before storage. Digitizations were performed with and without black masking using 8-bit and 16-bit grayscale and saved in TIFF format. Four anatomic landmarks were classified by two observers (very good, good, moderate, regular, poor), in two random sessions. Intraobserver and interobserver agreements were evaluated by Kappa statistics. Inter and intraobserver agreements ranged according to the anatomic landmarks and resolution used. The results obtained demonstrated that the cement enamel junction was the anatomic landmark that presented the poorest concordance. The use of black masking provided better results in the digitized image. The use of a mask to cover radiographs during digitization is necessary. Therefore, the concordance ranged from regular to moderate for the intraobserver evaluation and concordance ranged from regular to poor for interobserver evaluation.

Self-Digitization of Sample Volumes

Cohen, Dawn E.; Schneider, Thomas; Wang, Michelle; Chiu, Daniel T.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 01/07/2010 EN
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This paper describes a very simple and robust microfluidic device for digitizing samples into an array of discrete volumes. The device is based on an inherent fluidic phenomenon, where an incoming aqueous sample divides itself into an array of chambers that have been primed with an immiscible phase. Self-digitization of sample volumes results from the interplay between fluidic forces, interfacial tension, channel geometry, and the final stability of the digitized samples in the chambers. Here we describe experiments and simulations that were used to characterize these parameters and the conditions under which the self-digitization process occurred. Unlike existing methods used to partition samples into array, our method is able to digitize 100% of a sample into a localized array without any loss of sample volume. The final volume of the discretized sample at each location is defined by the geometry and size of each chamber. Thus, we can form an array of samples with varying but predefined volumes. We exploited this feature to separate the crystal growth of otherwise concomitant polymorphs from a single solution. Additionally, we demonstrated the removal of the digitized samples from the chambers for downstream analysis, as well as the addition of reagents to the digitized samples. We believe this simple method will be useful in a broad range of applications where a large array of discretized samples is required...

Pre-Processing of Point-Data from Contact and Optical 3D Digitization Sensors

Budak, Igor; Vukelić, Djordje; Bračun, Drago; Hodolič, Janko; Soković, Mirko
Fonte: Molecular Diversity Preservation International (MDPI) Publicador: Molecular Diversity Preservation International (MDPI)
Tipo: Artigo de Revista Científica
Publicado em 20/01/2012 EN
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27.07%
Contemporary 3D digitization systems employed by reverse engineering (RE) feature ever-growing scanning speeds with the ability to generate large quantity of points in a unit of time. Although advantageous for the quality and efficiency of RE modelling, the huge number of point datas can turn into a serious practical problem, later on, when the CAD model is generated. In addition, 3D digitization processes are very often plagued by measuring errors, which can be attributed to the very nature of measuring systems, various characteristics of the digitized objects and subjective errors by the operator, which also contribute to problems in the CAD model generation process. This paper presents an integral system for the pre-processing of point data, i.e., filtering, smoothing and reduction, based on a cross-sectional RE approach. In the course of the proposed system development, major emphasis was placed on the module for point data reduction, which was designed according to a novel approach with integrated deviation analysis and fuzzy logic reasoning. The developed system was verified through its application on three case studies, on point data from objects of versatile geometries obtained by contact and laser 3D digitization systems. The obtained results demonstrate the effectiveness of the system.

Digital LAMP in a sample self-digitization (SD) chip

Gansen, Alexander; Herrick, Alison M.; Dimov, Ivan K.; Lee, Luke P.; Chiu, Daniel T.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
27.07%
This paper describes the realization of digital loop-mediated DNA amplification (dLAMP) in a sample self-digitization (SD) chip. Digital DNA amplification has become an attractive technique to quantify absolute concentrations of DNA in a sample. While digital polymerase chain reaction is still the most widespread implementation, its use in resource—limited settings is impeded by the need for thermal cycling and robust temperature control. In such situations, isothermal protocols that can amplify DNA or RNA without thermal cycling are of great interest. Here, we showed the successful amplification of single DNA molecules in a stationary droplet array using isothermal digital loop-mediated DNA amplification. Unlike most (if not all) existing methods for sample discretization, our design allows for automated, loss-less digitization of sample volumes on-chip. We demonstrated accurate quantification of relative and absolute DNA concentrations with sample volumes of less than 2 μl. We assessed the homogeneity of droplet size during sample self-digitization in our device, and verified that the size variation was small enough such that straightforward counting of LAMP-active droplets sufficed for data analysis. We anticipate that the simplicity and robustness of our SD chip make it attractive as an inexpensive and easy-to-operate device for DNA amplification...

Mass digitization of scientific collections: New opportunities to transform the use of biological specimens and underwrite biodiversity science

Beaman, Reed S.; Cellinese, Nico
Fonte: Pensoft Publishers Publicador: Pensoft Publishers
Tipo: Artigo de Revista Científica
Publicado em 20/07/2012 EN
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27.07%
New information technologies have enabled the scientific collections community and its stakeholders to adapt, adopt, and leverage novel approaches for a nearly 300 years old scientific discipline. Now, few can credibly question the transformational impact of technology on efforts to digitize scientific collections, as IT now reaches into almost every nook and cranny of society. Five to ten years ago this was not the case. Digitization is an activity that museums and academic institutions increasingly recognize, though many still do not embrace, as a means to boost the impact of collections to research and society through improved access. The acquisition and use of scientific collections is a global endeavor, and digitization enhances their value by improved access to core biodiversity information, increases use, relevance and potential downstream value, for example, in the management of natural resources, policy development, food security, and planetary and human health. This paper examines new opportunities to design and implement infrastructure that will support not just mass digitization efforts, but also a broad range of research on biological diversity and physical sciences in order to make scientific collections increasingly relevant to societal needs and interest.

Five task clusters that enable efficient and effective digitization of biological collections

Nelson, Gil; Paul, Deborah; Riccardi, Gregory; Mast, Austin R.
Fonte: Pensoft Publishers Publicador: Pensoft Publishers
Tipo: Artigo de Revista Científica
Publicado em 20/07/2012 EN
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27.4%
This paper describes and illustrates five major clusters of related tasks (herein referred to as task clusters) that are common to efficient and effective practices in the digitization of biological specimen data and media. Examples of these clusters come from the observation of diverse digitization processes. The staff of iDigBio (The U.S. National Science Foundation’s National Resource for Advancing Digitization of Biological Collections) visited active biological and paleontological collections digitization programs for the purpose of documenting and assessing current digitization practices and tools. These observations identified five task clusters that comprise the digitization process leading up to data publication: (1) pre-digitization curation and staging, (2) specimen image capture, (3) specimen image processing, (4) electronic data capture, and (5) georeferencing locality descriptions. While not all institutions are completing each of these task clusters for each specimen, these clusters describe a composite picture of digitization of biological and paleontological specimens across the programs that were observed. We describe these clusters, three workflow patterns that dominate the implemention of these clusters, and offer a set of workflow recommendations for digitization programs.

No specimen left behind: industrial scale digitization of natural history collections

Blagoderov, Vladimir; Kitching, Ian J.; Livermore, Laurence; Simonsen, Thomas J.; Smith, Vincent S.
Fonte: Pensoft Publishers Publicador: Pensoft Publishers
Tipo: Artigo de Revista Científica
Publicado em 20/07/2012 EN
Relevância na Pesquisa
27.07%
Traditional approaches for digitizing natural history collections, which include both imaging and metadata capture, are both labour- and time-intensive. Mass-digitization can only be completed if the resource-intensive steps, such as specimen selection and databasing of associated information, are minimized. Digitization of larger collections should employ an “industrial” approach, using the principles of automation and crowd sourcing, with minimal initial metadata collection including a mandatory persistent identifier. A new workflow for the mass-digitization of natural history museum collections based on these principles, and using SatScan® tray scanning system, is described.

Self-Digitization of Samples into a High-Density Microfluidic Bottom-Well Array

Schneider, Thomas; Yen, Gloria S.; Thompson, Alison M.; Burnham, Daniel R.; Chiu, Daniel T.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
27.07%
This paper describes a sample digitization method that generates tens of thousands of nanoliter-sized droplets in a high-density array in a matter of minutes. We show that the sample digitization depends on both the geometric design of the microfluidic device and the viscoelastic forces between the aqueous sample and a continuous oil phase. Our design avoids sample loss: Samples are split into tens of thousands of discreet volumes with close to 100% efficiency without the need for any expensive valving or pumping systems. We envision this technology will have broad applications that require simple sample digitization within minutes, such as digital polymerase chain reactions and single-cell studies.

Estimating the Economic Impact of Mass Digitization Projects on Copyright Holders: Evidence from the Google Book Search Litigation

Travis, Hannibal B
Fonte: SelectedWorks Publicador: SelectedWorks
Tipo: Artigo de Revista Científica
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Google Book Search (GBS) has captured the attention of many commentators and government officials, but even as they vigorously debate its legality, few of them have marshaled new facts to determine its likely effects on publishing and other information markets. This Article challenges the conventional wisdom propounded by the U.S. and German governments, as well as Microsoft and other competitors of Google, concerning the likely economic impact of mass book-digitization projects. Originally advanced by publishing industry lobbying groups, the prevailing account of mass book-digitization projects is that they will devastate authors and publishers, just as Napster and its heirs have supposedly devastated musicians and music labels. Using the impact of GBS on the revenues and operating incomes of U.S. publishers believing themselves to be the most affected by it, this Article finds no evidence of a negative impact upon them. To the contrary, it provides some evidence of a positive impact, and proposes further empirical research to identify the mechanisms of digitization’s economic impact. The debate surrounding the GBS settlement is critically important to students, writers, researchers, and the general public, as it may decide whether a federal appellate court or even the U.S. Supreme Court allows the best research tool ever designed to survive. If the theory of Microsoft and some publishing trade associations is accepted...

More Pixels, Less Process: Decision making for minimal process digitization

Focke, Amanda York
Fonte: Rice University Publicador: Rice University
ENG
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36.92%
Presenting a minimal process digitization approach for digitizing archival materials (at the folder level with minimal metadata), as compared to a more common full process approach at the individual item level with extensive metadata. Originally presented at the Society of American Archivists annual meeting, August 2008, in San Francisco.

Indiana University Digitization Master Plan

Lewis, David; Plale, Beth
Fonte: Universidade de Indiana Publicador: Universidade de Indiana
Tipo: Relatório
EN_US
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In his State of the University address on October 1, 2013, Indiana University President Michael McRobbie emphasized that universities have a critical role to play in the preservation of knowledge. In keeping with this goal, President McRobbie announced a charter for an Indiana University Digitization Master Plan (DMP). The DMP is to look beyond time-based media and formulate a university-wide roadmap to digitize and store in some form all of our existing collections judged by experts and scholars to be of lasting importance to research and scholarship, and to ensure the preservation of all new research and scholarship at IU that is born digital.

Mejora del rango dinámico en la digitalización de documentos desde una perspectiva patrimonial: evaluación de métodos de alto rango dinámico (HDR) basados en exposiciones múltiples.; Dynamic range improvement in document digitization from a cultural heritage perspective: assessment of high dynamic range (HDR) methods based on multiple exposures.

Robledano Arillo, Jesús
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: Relatório Formato: text/plain; application/octet-stream; application/octet-stream; application/octet-stream; application/pdf
Publicado em 25/09/2010 SPA
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37.17%
Uno de los principales problemas de calidad en la digitalización de documentos, especialmente de carácter gráfico, es la falta de rango dinámico en los dispositivos de captura. Una posible vía de trabajo para su evitación es la aplicación de técnicas de alto rango dinámico (HDR) basadas en la fusión de múltiples capturas tomadas a diferentes exposiciones. Si se demuestra la idoneidad de la aplicación de estas técnicas en el contexto del patrimonio documental, podrían obtenerse capturas digitales de gran calidad con el empleo de equipamiento de menor coste y fácilmente asequible para instituciones con pocos recursos económicos. En este trabajo se realiza una aproximación teórica y experimental al concepto y métodos de evaluación de la calidad en la digitalización de documentos, la incidencia en la calidad del rango dinámico, y la viabilidad de aplicación de técnicas HDR en el caso de la digitalización de documentos con valor patrimonial.; One of the main quality problems in document digitization, especially in graphic documents, is low dynamic range in the capture devices. A possible way to avoid that problem is applying high dynamic range techniques (HDR) based on multiple exposures. If these techniques were suitable for the digitization of documents from the cultural heritage perspective...

Remediating Photography: Reimagining Ethics In-Light of Online Photo-Sharing Practices

SCARLETT, Ashley
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
EN; EN
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27.07%
Photography has been exposed as an infinitely complex series of intersecting technologies, industries, discourses and socio-cultural desires. Figured as an image-making medium that bears the direct trace (light) of reality, it has become a fundamental method through which we construct identity, capture memories, communicate knowledge and reflect and shape reality. Its resulting conceptualization as a discourse-laden visual language, that enables the (co)articulation of subject (self), object (device) and truth, has located it as a central locus of ethical consequence. While there has been a significant amount of research into an ethics of photographic representation, there has been very little consideration of the importance of reconsidering the intersection of photography (in and of itself) and ethics in light of digitization. While this thesis will function to map out a number of theoretical and practical trajectories, its central purpose will be to draw upon a rich understanding of analogue and digital photography in order to critically re-imagine ethics in light of digitization. This thesis begins by mapping out a series of continuities and discontinuities in the technological, sociological and practical engagements of photography as a result of digitization. Following in this vein...

Faster and improved 3-D head digitization in MEG using Kinect

Vema Krishna Murthy, Santosh; MacLellan, Matthew; Beyea, Steven; Bardouille, Timothy
Fonte: Frontiers Media S.A. Publicador: Frontiers Media S.A.
Tipo: Artigo de Revista Científica
Publicado em 28/10/2014 EN
Relevância na Pesquisa
27.17%
Accuracy in localizing the brain areas that generate neuromagnetic activity in magnetoencephalography (MEG) is dependent on properly co-registering MEG data to the participant's structural magnetic resonance image (MRI). Effective MEG-MRI co-registration is, in turn, dependent on how accurately we can digitize anatomical landmarks on the surface of the head. In this study, we compared the performance of three devices—Polhemus electromagnetic system, NextEngine laser scanner and Microsoft Kinect for Windows—for source localization accuracy and MEG-MRI co-registration. A calibrated phantom was used for verifying the source localization accuracy. The Kinect improved source localization accuracy over the Polhemus and the laser scanner by 2.23 mm (137%) and 0.81 mm (50%), respectively. MEG-MRI co-registration accuracy was verified on data from five healthy human participants, who received the digitization process using all three devices. The Kinect device captured approximately 2000 times more surface points than the Polhemus in one third of the time (1 min compared to 3 min) and thrice as many points as the NextEngine laser scanner. Following automated surface matching, the calculated mean MEG-MRI co-registration error for the Kinect was improved by 2.85 mm with respect to the Polhemus device...

Inselect: Automating the Digitization of Natural History Collections

Hudson, Lawrence N.; Blagoderov, Vladimir; Heaton, Alice; Holtzhausen, Pieter; Livermore, Laurence; Price, Benjamin W.; van der Walt, Stéfan; Smith, Vincent S.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 23/11/2015 EN
Relevância na Pesquisa
27.17%
The world’s natural history collections constitute an enormous evidence base for scientific research on the natural world. To facilitate these studies and improve access to collections, many organisations are embarking on major programmes of digitization. This requires automated approaches to mass-digitization that support rapid imaging of specimens and associated data capture, in order to process the tens of millions of specimens common to most natural history collections. In this paper we present Inselect—a modular, easy-to-use, cross-platform suite of open-source software tools that supports the semi-automated processing of specimen images generated by natural history digitization programmes. The software is made up of a Windows, Mac OS X, and Linux desktop application, together with command-line tools that are designed for unattended operation on batches of images. Blending image visualisation algorithms that automatically recognise specimens together with workflows to support post-processing tasks such as barcode reading, label transcription and metadata capture, Inselect fills a critical gap to increase the rate of specimen digitization.

Mass digitization

United States -- National Commission on Libraries and Information Science
Fonte: U.S. National Commission on Libraries and Information Sciences ( Washington, DC ) Publicador: U.S. National Commission on Libraries and Information Sciences ( Washington, DC )
Tipo: text Formato: 24 pages : digital, PDF file ;
Publicado em //2006 ENGLISH
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37.17%
(System Details) Mode of access: Internet from the NCLIS web site. Address as of 10/11/2007: http://www.nclis.gov/digitization/MassDigitizationSymposium-Report.pdf; current access available via PURL.; Title from title screen (viewed on Oct. 11, 2007).; "May 9, 2006."; Report from "Scholarship and Libraries in Transition: A Dialogue about the Impacts of Mass Digitization Projects", Symposium held on March 10-11, 2006 University of Michigan, Ann Arbor, MI.

Museum libraries: how digitization can enhance the value of the museum

Navarrete,Trilce; Mackenzie Owen,John
Fonte: Palabra clave Publicador: Palabra clave
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2011 EN
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36.92%
It is the responsibility of the museum library to enhance the understanding of the museum collection and the role of museum objects as cultural documents. For many reasons, this role is only partially fulfilled, if at all. This is because in practice the library and its museum are insufficiently integrated to perform effectively together. We argue that in a digital world, the library and the museum can and should be re-integrated into a single cultural information system. However, since in practice digitization of the library and the museum follow different paths, museums and their libraries will have to change their thinking about how to proceed.

Moving with the times in search of permanence: the digitization of "liberation struggle" archives in southern Africa

Garaba,Francis; Ngulube,Patrick
Fonte: Historia Publicador: Historia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/11/2010 EN
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37.17%
The struggle to liberate southern Africa was an important epoch in contemporary history. It follows then that this history must be preserved for posterity's sake. Of late, there has been a concerted effort by academics and archivists to preserve, digitize and disseminate on the web the "struggle archives" of southern Africa. The wide range of material reflects the diverse nature of the struggle; liberation was achieved by violent as well as non-violent means. The digitization of such records reinforces the view that these archives are part of Africa's heritage to be bequeathed to future generations and that they should be jealously guarded because they are a treasured resource. In carrying out the digitization exercise there is a need to exercise extreme caution in view of the lack of permanence of digital objects and the challenges posed by access and copyright restrictions. The issue that needs to be addressed centres on the commodification of African heritage by those with the financial and technological muscle, whilst the purported beneficiaries are left impoverished due to a lack of ownership and sustainability. In other words, through digitization Africa's cultural heritage is made vulnerable to commercial exploitation by people in the North...