Letteratura scientifica selezionata sul tema "Virtual disk format"
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Articoli di riviste sul tema "Virtual disk format"
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Patange, Pritam. "Virtual Disks Performance Analysis Using Flexible I/O and Powerstat". International Journal for Research in Applied Science and Engineering Technology 9, n. 10 (31 ottobre 2021): 267–96. http://dx.doi.org/10.22214/ijraset.2021.38392.
Testo completoAbstract (sommario):
Abstract: Cloud computing has experienced significant growth in the recent years owing to the various advantages it provides such as 24/7 availability, quick provisioning of resources, easy scalability to name a few. Virtualization is the backbone of cloud computing. Virtual Machines (VMs) are created and executed by a software called Virtual Machine Monitor (VMM) or the hypervisor. It separates compute environments from the actual physical infrastructure. A disk image file representing a single virtual machine is created on the hypervisor’s file system. In this paper, we analysed the runtime performance of multiple different disk image file formats. The analysis comprises of four different parameters of performance namely- bandwidth, latency, input-output operations performed per second (IOPS) and power consumption. The impact of the hypervisor’s block and file sizes is also analysed for the different file formats. The paper aims to act as a reference for the reader in choosing the most appropriate disk file image format for their use case based on the performance comparisons made between different disk image file formats on two different hypervisors – KVM and VirtualBox. Keywords: Virtualization, Virtual disk formats, Cloud computing, fio, KVM, virt-manager, powerstat, VirtualBox.
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Bondarev, Oleg, Artyom Killer, Alexey Abakumov, Alexander Solovyov e Daniil Lelyuk. "Information system for managing the register of serialized items based on a cloud service for enterprise economic development". E3S Web of Conferences 402 (2023): 03056. http://dx.doi.org/10.1051/e3sconf/202340203056.
Testo completoAbstract (sommario):
This article describes the development of an information system for managing the register of serialized items based on a cloud service. Cloud services provide the ability to access computer equipment, hardware resources, disk memory and databases via the Internet in a remote format. The developed information system belongs to the type of information retrieval system. Examples of cloud services include: renting a virtual server; virtual contact center; application rental; data store; private cloud. For development, you need to use the services of cloud services for renting a virtual server.
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Comes, Radu, Călin Gheorghe Dan Neamțu, Cătălin Grec, Zsolt Levente Buna, Cristian Găzdac e Liliana Mateescu-Suciu. "Digital Reconstruction of Fragmented Cultural Heritage Assets: The Case Study of the Dacian Embossed Disk from Piatra Roșie". Applied Sciences 12, n. 16 (14 agosto 2022): 8131. http://dx.doi.org/10.3390/app12168131.
Testo completoAbstract (sommario):
The most peculiar characteristic of a cultural heritage is represented by its uniqueness. To ensure that an object is preserved against environmental deterioration, vandal attacks, and accidents, modern Cultural Heritage documentation involves 3D scanning technologies. In the case of fragmented artefacts, the digitization process represents an essential prerequisite for facilitating an accurate 3D reconstruction. The aim of this research paper is to present a framework that enables an accurate digital reconstruction of fragmented or damaged artefacts using ornament stencils obtained from 3D scan data. The proposed framework has been applied for the richly adorned ornaments of the fragmented Dacian embossed disk from Piatra Roșie. The case study makes use of the 3D dataset acquired, using a structured light scanner to extract vector displacement maps, which are then applied to the 3D computer-aided design (CAD) model. The output of the framework includes a proposed digital reconstruction of the aurochs fragmented Dacian embossed disk, as well as the ornaments’ stencils database. The proposed framework addresses problems that are associated with 3D reconstruction processes, such as self-intersections, non-manifold geometry, 3D model topology, and file format interoperability. Finally, the resulting 3D reconstruction has been integrated within virtual reality (VR), augmented reality (AR), and mixed reality (MR) applications, as well as computer-aided manufacturing (CAM) based on additive manufacturing to facilitate the dissemination of the results.
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FITCH, DANIEL, e HAIPING XU. "A RAID-BASED SECURE AND FAULT-TOLERANT MODEL FOR CLOUD INFORMATION STORAGE". International Journal of Software Engineering and Knowledge Engineering 23, n. 05 (giugno 2013): 627–54. http://dx.doi.org/10.1142/s0218194013400111.
Testo completoAbstract (sommario):
Cloud computing allows for access to ubiquitous data storage and powerful computing resources through the use of web services. There are major concerns, however, with data security, reliability, and availability in the cloud. In this paper, we address these concerns by introducing a novel security mechanism for secure and fault-tolerant cloud information storage. The information storage model follows the RAID (Redundant Array of Independent Disks) concept by considering cloud service providers as independent virtual disk drives. As such, the model utilizes multiple cloud service providers as a cloud cluster for information storage, and a service directory for management of the cloud clusters including service query, key management, and cluster restoration. Our approach not only supports maintaining the confidentiality of the stored data, but also ensures that the failure or compromise of an individual cloud provider in a cloud cluster will not result in a compromise of the overall data set. To ensure a correct design, we present a formal model of the security mechanism using hierarchical colored Petri nets (HCPN), and verify some key properties of the model using model checking techniques.
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Dayu, Refni, Jamal Mirdad e Nidya Fitri. "Pengembangan Multimedia Google Earth Berbasis Virtual Mata Pelajaran Ski di Madrasah Tsanawiyah (MTs)". Ideas: Jurnal Pendidikan, Sosial, dan Budaya 8, n. 3 (13 settembre 2022): 1179. http://dx.doi.org/10.32884/ideas.v8i3.902.
Testo completoAbstract (sommario):
Multimedia Development of Virtual-Based Google Earth Learning in SKI Subjects in MTs, The development of virtual-based google earth learning multimedia is an effort to visualize places / locations in three dimensions because lectures are insufficient in expressing material orally and using media have not varied used by teachers so that students are unable to understand the material about SKI subjects. This has an impact on one of the factors that make SKI subjects difficult to understand. The research aims to develop multimedia learning SKI (History of Islamic Culture) in Madrasah Tsanawiyah Negeri 1 Solok by using an interactive multimedia format in showing the places where the dawah trip of Prophet Muhaamad saw. in Makkah and to find out the validity of virtual-based google earth learning multimedia. The research methods used are research and development (development research) the ADDIE model developed by Dick and Carry (1) needs analysis; (2) design of the developed product; (3) expert validation and revision; (4) field trials. Instruments for collecting data in this study are interviews, observations, validation sheets. The multimedia that has been developed is then tested for validity by experts using Aikens V. Research results show that the results of virtual-based google earth multimedia validation are categorized as very valid (0.915). Based on the validation results, this virtual-based google earth multimedia is valid for use in ski learning the dawah material of the Prophet Muhammad saw in Makkah.
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Bilokobylskyi, Yurii. "Political Internet discourse as a subject of linguistic research: definition and characteristics". Current issues of Ukrainian linguistics: theory and practice, n. 45 (2022): 129–43. http://dx.doi.org/10.17721/apultp.2022.45.129-143.
Testo completoAbstract (sommario):
The article is devoted to the study of political discourse within the virtual space – an "artificial" world created in recent decades with the help of information technologies, where individuals are able to communicate with each other over vast distances, modeling their own personality at will. The research, in particular, is aimed at studyinh how political communication changes in the virtual reality, what linguistic and extralinguistic means are used by political actors when communicating with their electorate and between each other. Using the categories proposed by T. van Dijk, the article proposes the use of new characteristic features for Internet discourse, such as speaker's anonymity, semi-formal tone of communication, more open and competitive expression of opinions, emotionality, etc. for the analysis of communication within the virtual space. The article proposes a clarification of the definition of political discourse, highlights its most important features, defines differences in communicative strategies depending on the gender of the speaker or political actor. With the help of the proposed categories and based on the works of such prominent scholars as R. Wodak, L. de Saussure and T. van Dijk, the article provides a new definition of the concept of political Internet discourse, which is aimed at a more complete consideration of the interaction between individuals within the virtual space. It is suggested to use the categories proposed by T. van Dijk for the analysis of communication within the virtual space, which will allow to single out communicative situations that are directly related to the political sphere. By comparing communicative situations in the "artificial" world with the physical one, it is argued that a characteristic feature of political Internet discourse is the transfer of extralinguistic components through textual communication. It is clarified that in many communicativesituations between political actors and other users, the latter act as the information recipients, limited only to the ability to interact with other recipients. In conclusion, it is suggested to understand political Internet discourse as actions of a linguistic and extralinguistic nature, related to the political sphere and implemented in the virtual space by political actors and ordinary users; actions, which are characterized by the possibility of anonymous subjectivity, semi-formality, a more open and competitive nature of expressing opinions, etc., and in which the transfer of extralinguistic components is achieved mainly through text communication. Based on the categorical clarifications made in the article, strategies for further Internet discourse analysis are developed.
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Jaramillo, Olga Johanna. "Estrategias de integración del marco situacional para la comprensión lectora de textos académicos digitales". Sophia 15, n. 1 (29 marzo 2019): 97–108. http://dx.doi.org/10.18634/sophiaj.15v.1i.509.
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Esta investigación forma parte de un proyecto del grupo DiLeMa, que diseñó un paquete interactivo virtual para la comprensión de textos expositivo-explicativos en formato hipermedial, sobre la base del Modelo constructivo-integrativo de W. Kintsch y van Dijk (1978), Los tres niveles de representación de W. Kintsch (1998), el texto expositivo-explicativo de T. Ãlvarez, los subtipos del texto expositivo-explicativo de Meyer (1984) y la Web 2.0. Además, presenta un panorama de investigaciones relacionadas con la lectura de textos de dicha tipología, mediante herramientas de la plataforma Moodle, para dar lugar a las metodologías cualitativa y hermenéutico-dialéctica de tres instrumentos de medición, con el fin de llegar al análisis de resultados y a cinco conclusiones como estrategias que buscan cualificar el marco situacional en quince estudiantes. Â
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Presnov, Dmitri, Julia Kurz, Judith Willkomm, Johannes Dillmann, Daniel Alt, Robert Zilke, Veit Braun, Cornelius Schubert e Andreas Kolb. "Anatomically Integrated In-Place Visualization of Patient Data for Cooperative Tasks with a Case Study on a Neurosurgical Ward". Health Informatics Journal 29, n. 2 (aprile 2023): 146045822311718. http://dx.doi.org/10.1177/14604582231171878.
Testo completoAbstract (sommario):
The workflow in modern hospitals entails that the medical treatment of a patient is distributed between several physicians and nurses. This leads to intensive cooperation, which takes place under particular time pressure and requires efficient conveyance of relevant patient-related medical data to colleagues. This requirement is difficult to achieve with traditional data representation approaches. In this paper, we introduce a novel concept of anatomically integrated in-place visualization designed to engage with cooperative tasks on a neurosurgical ward by using a virtual patient’s body as spatial representation of visually encoded abstract medical data. Based on the findings of our field studies, we provide a set of formal requirements and procedures for this kind of visual encoding. Moreover, we implemented a prototype on a mobile device that supports the diagnosis of spinal disc herniation and has been evaluated by 10 neurosurgeons. The physicians have assessed the proposed concept as beneficial, especially emphasizing the advantages of the anatomical integration such as intuitiveness and a better data availability due to providing all information at a glance. Particularly, four of nine respondents have stressed solely benefits of the concept, other four have mentioned benefits with some limitations and only one person has seen no benefits.
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Braune, Eike-Benjamin, Felix Geist, Xiaojia Tang, Krishna Kalari, Judy Boughey, Liewei Wang, Roberto A. Leon-Ferre et al. "Abstract B013: Identification of a Notch transcriptomic signature for breast cancer". Molecular Cancer Therapeutics 22, n. 12_Supplement (1 dicembre 2023): B013. http://dx.doi.org/10.1158/1535-7163.targ-23-b013.
Testo completoAbstract (sommario):
Abstract Background: Dysregulated Notch signalling contributes to breast cancer development and progression, but validated tools to measure the level of Notch signalling in breast cancer subtypes and in response to systemic therapy are largely lacking. A transcriptomic signature of Notch signalling would thus be warranted, and in this report, we have established such a classifier. Methods: To generate the signature, we first identified Notch-regulated genes from six basal-like breast cancer cell lines subjected to elevated and reduced Notch signalling by culturing on immobilized Notch ligand Jagged1 or blockade of Notch by g-secretase inhibitors, respectively. From this cadre of Notch-regulated genes, we developed candidate transcriptomic signatures that were trained on a breast cancer patient dataset (the TCGA-BRCA cohort) and a broader breast cancer cell line cohort and sought to validate in independent data sets. Results: An optimal 20-gene transcriptomic signature was selected. We validated the signature on two independent patient datasets (METABRIC and Oslo2) and it showed an improved coherence score and tumour specificity compared with previously published signatures. Furthermore, the signature score was particularly high for basal-like breast cancer, indicating an enhanced level of Notch signalling in this subtype. The signature score was increased after neoadjuvant treatment in the PROMIX and BEAUTY patient cohorts, and a lower signature score generally correlated with better clinical outcome. Conclusions: The 20-gene transcriptional signature has the potential to better stratify patients and to evaluate the response of future Notch-based therapies for breast cancer. Citation Format: Eike-Benjamin Braune, Felix Geist, Xiaojia Tang, Krishna Kalari, Judy Boughey, Liewei Wang, Roberto A. Leon-Ferre, Antonino B. D’Assoro, James N. Ingle, Matthew P. Goetz, Kang Wang, Theodoros Foukakis, Anita Seshire, Dirk Wienke, Urban Lendahl. Identification of a Notch transcriptomic signature for breast cancer [abstract]. In: Proceedings of the AACR-NCI-EORTC Virtual International Conference on Molecular Targets and Cancer Therapeutics; 2023 Oct 11-15; Boston, MA. Philadelphia (PA): AACR; Mol Cancer Ther 2023;22(12 Suppl):Abstract nr B013.
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Neumüller, Ralph A., Birgit Wilding, Dirk Scharn, Anke Baum, Martin Augsten, Irene Waizenegger, Shinji Kohsaka et al. "Abstract C140: BI 1810631 is a novel EGFR wild-type sparing, HER2-selective small molecule inhibitor that efficiently blocks HER2 mutant-driven lung cancer". Molecular Cancer Therapeutics 22, n. 12_Supplement (1 dicembre 2023): C140. http://dx.doi.org/10.1158/1535-7163.targ-23-c140.
Testo completoAbstract (sommario):
Abstract Here we report pre-clinical characterization of the clinical compound BI 1810631, a HER2 specific, EGFR wild-type-sparing tyrosine kinase inhibitor (TKI). BI 1810631 has shown early signs of clinical activity in patients carrying tumors with HER2 aberrations [NCT04886804], mainly comprising HER2 mutations (Heymach et al. 2023). In non-small cell lung cancer, activating mutations in HER2 are found in 2-4% of patients and predominantly cluster in exon 20 within the tyrosine kinase domain (TKD), of which the most frequent variant is A775_G776insYVMA. Studies across tumor cell lines and xenograft mouse models show that BI 1810631 is a potent and selective inhibitor of HER2-driven oncogenic signaling. Compound-mediated reduction of cell growth and survival was observed in mutant HER2 driven Ba/F3 cell systems, in human tumor cell lines in vitro and translated into tumor regressions in a genome-engineered HER2-YVMA mutant xenograft model. The in vivo efficacy of BI 1810631 was further confirmed in HER2 exon 20 mutant patient-derived tumor models. Corresponding biomarker studies in vitro and in vivo showed modulation of pharmacodynamic markers, corroborating the on-target mechanism of action of the compound. These findings demonstrate that HER2 mutations can be effectively addressed by BI 1810631 and support the ongoing and future clinical trials. Citation Format: Ralph A. Neumüller, Birgit Wilding, Dirk Scharn, Anke Baum, Martin Augsten, Irene Waizenegger, Shinji Kohsaka, Valeria Santoro, Paolo Chetta, Lydia Woelflingseder, Johannes Popow, Daniel Gerlach, Peter Ettmayer, Thomas Gerstberger, Julian Fuchs, Matthias Treu, Stephan Zahn, Mark Pearson, Mark Petronczki, Darryl B. McConnell, Norbert Kraut, Flavio Solca. BI 1810631 is a novel EGFR wild-type sparing, HER2-selective small molecule inhibitor that efficiently blocks HER2 mutant-driven lung cancer [abstract]. In: Proceedings of the AACR-NCI-EORTC Virtual International Conference on Molecular Targets and Cancer Therapeutics; 2023 Oct 11-15; Boston, MA. Philadelphia (PA): AACR; Mol Cancer Ther 2023;22(12 Suppl):Abstract nr C140.
Tesi sul tema "Virtual disk format"
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Nguetchouang, Ngongang Kevin. "Efficient Storage Virtualization in Cloud Environments". Electronic Thesis or Diss., Lyon, École normale supérieure, 2024. http://www.theses.fr/2024ENSL0034.
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L’avènement du Cloud computing a révolutionné le paysage de la technologie moderne, offrant aux organisations une flexibilité, une capacité de passage à l’échelle et une accessibilité sans précédent dans l’exploitation des ressources informatiques à distance via Internet. Des innovations clés telles que le serverless, les conteneurs et les machines virtuelles ont joué des rôles cruciaux dans le remodelage de la manière dont les entreprises opèrent et fournissent des services. À notre époque de prise de décision basée sur les données, des solutions de stockage efficaces sont primordiales. La virtualisation du stockage émerge comme un facilitateur de la gestion efficace du stockage dans les environnements cloud, permettant une évolutivité et une optimisation des ressources sans faille. Cependant, la croissance rapide des données et l’évolution des besoins des utilisateurs ont amené de nouveaux défis tels que la gestion des sauvegardes, la réduction de la latence d’accès au stockage et la tolérance aux pannes dans les environnements de stockage distribué. Cette thèse présente trois contributions significatives pour relever ces défis: Un format de disque virtuel évolutif pour résoudre le problème de passage à l’échelle de disques virtuels composés de longues chaines de snapshots. Un système de mise en cache opportuniste des données pour les plateformes FaaS. Un système de stockage distribué qui tire parti de l’existence de répliques secondaires de données pour garantir l’équilibre de la charge des demandes et l’équité de la gestion des ressources. Nous avons construit un prototype de chacune de nos contributions et validé leur efficacitéThe advent of cloud computing has revolutionized the modern technology landscape, providing organizations with unprecedented flexibility, scalability and accessibility in operating computing resources remotely over the Internet. Key innovations such as serverless, containers and virtual machines have played crucial roles in reshaping the way businesses operate and deliver services.In this age of data-driven decision-making, efficient storage solutions are paramount. Storage virtualization is emerging as an enabler for efficient storage management in cloud environments, enabling seamless scalability and resource optimization. However, rapid data growth and evolving user needs have brought new challenges such as managing backups, reducing storage access latency, and fault tolerance in distributed storage environments.This thesis presents three significant contributions to address these challenges:A scalable virtual disk format to solve the problem of scaling virtual disks composed of long snapshot chains.An opportunistic data caching system for FaaS platforms.A distributed storage system that takes advantage of the existence of secondary replicas of data to ensure request load balancing and fairness of resource management.We built a prototype of each of our contributions and validated their effectiveness
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Rigo, Rosa Maria. "Media??o pedag?gica em ambientes virtuais de aprendizagem". Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2014. http://tede2.pucrs.br/tede2/handle/tede/3820.
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Previous issue date: 2014-12-01This study presents a research with descriptive exploratory approach, which analysis was qualitative, from a study that approached the pedagogic mediation in virtual learning environments. The analysis and thoughts came from the various authors works that approach the theme, focusing in to discuss the relevant aspects of pedagogic mediation, associate to technologies on the didactics processes mediation in learning virtual environments. We used as searching instruments an online questionnaire, applied to 17 teachers of public schools which work with preschool and elementary school of different regions of Brazil and outside. Those teachers were located in two lists from different extension activities and continuous formation that happened before than this dissertation. The study object questioning was about: Which online pedagogic mediation strategies contribute more for the teaching and learning virtual processes? The guiding questions stablished to the investigation were the following: Which are the online pedagogic practices that benefit more the online pedagogic mediation on the searching subjects? Which are the indicators to the qualification of practice of online pedagogic mediation from what was found on the research? As results of this search we can point that the strategies of online pedagogic mediations that more contribute to the virtual teaching and learning processes are the mediation which incentive the sharing of knowledge, the mediations that include interactivity, the mediations that include collaborative activities, the ones that offered feedbacks in short period of time, the ones that include conditions for execution of required activities, also the ones that give the belong feeling, what means, those that are possible for the group share/develop critical/constructive thoughts about their own knowledge, (re)balancing, that is to say, different views to the same problem, offering new constructions and (re)constructions. Those results represent a current scenario of new contexts of learning that deserve to be evaluated and described in support of continuous improvement of the practices and teachers formation in the distance mode.
Este trabalho apresenta uma pesquisa com abordagem descritivo-explorat?ria cuja an?lise foi qualitativa, a partir de um estudo de caso, que abordou a media??o pedag?gica em ambientes virtuais de aprendizagem. As an?lises e as reflex?es partiram das obras de diversos autores que abordam a tem?tica, buscando discutir aspectos relevantes da media??o pedag?gica, associada ?s tecnologias nos procedimentos did?ticos em ambientes virtuais de aprendizagem. Utilizamos como instrumento de pesquisa um question?rio on-line, aplicado a 17 professores de escolas p?blicas que atuam com educa??o infantil e ensino fundamental de diversas regi?es do Brasil e exterior. Tais professores foram localizados em duas listas oriundas de diferentes atividades de extens?o e de forma??o continuada de professores realizadas antes desta disserta??o. A problematiza??o do objeto de estudo recai sobre: Que estrat?gias de media??o pedag?gica on-line mais contribuem com os processos de ensino e de aprendizagem virtuais? As quest?es norteadoras estabelecidas para a investiga??o foram as seguintes: Quais s?o as pr?ticas pedag?gicas on-line que mais favorecem a media??o pedag?gica no entendimento dos sujeitos pesquisados? Quais seriam os indicadores para a qualifica??o das pr?ticas de media??o pedag?gica on-line a partir dos achados da pesquisa? Como resultados desta pesquisa pode-se apontar que as estrat?gias de media??o pedag?gica on-line que mais contribuem com os processos de ensino e aprendizagem virtuais s?o as media??es que incentivem a partilha de saberes, as media??es que contemplem interatividade, as media??es que contemplem atividades colaborativas, as que ofere?am feedback em curto espa?o de tempo, as media??es que comtemplem condi??es para executar as atividades exigidas, bem como as que propiciem sentimento de perten?a, ou seja, aquelas que possibilitam ao grupo partilhar/desenvolver pensamentos cr?ticos/construtivos sobre o pr?prio saber, (re)equilibrando-se, ou seja, diferentes olhares para um mesmo problema, oportunizando novas constru??es e (re)constru??es. Esses resultados representam um cen?rio atual de novos contextos de aprendizagem que merecem ser avaliados e descritos em prol da melhoria cont?nua das pr?ticas educativas e forma??o de professores na modalidade a dist?ncia.
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Dalva, Gercina. "A pol?tica de forma??o de professores a dist?ncia: avaliando o curso lato sensu para gestores escolares (2010-2012)". PROGRAMA DE P?S-GRADUA??O EM EDUCA??O, 2015. https://repositorio.ufrn.br/jspui/handle/123456789/23762.
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
Este trabalho analisa aspectos te?ricos e metodol?gicos indicativos de qualidade da forma??o continuada do curso lato sensu na modalidade a dist?ncia para gestores escolares em servi?o na educa??o b?sica p?blica do Rio Grande do Norte/2010-2012. Inscreve-se na pol?tica nacional de expans?o do ensino superior ? Programa Escola de Gestores ? em um contexto de mudan?as socioecon?mico e de reconfigura??o do Estado brasileiro. Os objetivos do curso atendiam aos reclamos de novos conhecimentos ao trabalho do gestor escolar visando promover a melhoria da qualidade da educa??o. Realizou-se em parceria entre o Minist?rio da Educa??o ? MEC, a Universidade Federal do Rio Grande do Norte (UFRN), a Secretaria de Estado de Educa??o e da Cultura/ RN e a Uni?o Nacional dos Dirigentes Municipais de Educa??o (Undime). O caminho metodol?gico cotejado ? o materialismo hist?rico dial?tico, cuja abordagem consiste em superar os entraves internos e externos ao pesquisador, o que torna a pesquisa um ato hist?rico, desenvolvido, portanto, de forma descont?nua. S?o considerados como sujeitos da pesquisa os gestores/cursistas que responderam o question?rio aplicado pela coordena??o do curso, na UFRN e postaram as atividades no ambiente virtual. Com base na literatura estudada e na experi?ncia da pesquisadora, produziu-se uma matriz de an?lise que representa o mapa de aspectos do campo emp?rico, constitu?do pelo ambiente pedag?gico virtual (salas-ambiente) hospedado na plataforma Moodle e das ferramentas did?ticas: f?runs e base de dados na qual se materializam as atividades postadas pelos gestores cursistas. A an?lise dos 144 question?rios contempla: a avalia??o da modalidade a dist?ncia, da atua??o dos profissionais, dos conte?dos das salas e a avalia??o geral do curso; analisaram-se, tamb?m, 64 atividades que correspondem a 10% das 633 que foram postadas na base de dados. Os resultados da pesquisa acenam para contradi??es, limites e desafios na expans?o do ensino superior na modalidade EAD e evidenciam modifica??es hist?ricas das pol?ticas educacionais. Todavia, mesmo em face ?s mudan?as na sociedade global e informacional, n?o ocorreram rupturas nos padr?es tradicionais de forma??o dos profissionais da educa??o, em particular os gestores escolares. Embora o curso tenha suscitado novos conhecimentos inerentes ? gest?o escolar, apresenta lacunas que s? podem ser preenchidas pela modalidade de ensino presencial. Os cursistas, em descompasso com os reclamos da sociedade em mudan?a, e, em particular com o mundo do trabalho, ainda n?o incorporaram suficientemente os conhecimentos relativos ?s novas tecnologias para enfrentar os desafios do dia a dia. Consideraram limitadas as condi??es de estudo, por n?o se adequarem ao tempo de trabalho, e, do ponto de vista t?cnico, ? prec?rio o acesso ao computador e ? internet.
This paper deals with theoretic and methodological aspects important to define the excellence of continuing education lato sensu to public school managers leading with distance learning in basic education in Rio Grande do Norte in 2009-2011. It is part of the national policy of enlargement of higher education, i.e. the School Managers Program, which interacts in a context of social and economic changes re-shaping the Brazilian state. The objectives of the course met the exigencies of new knowledge by school managers in view of offering a better education, thanks to a partnership involving the Ministry of Education (MEC), the Federal University of Rio Grande do Norte (UFRN), Rio Grande do Norte Education Office and the National Union of Municipal Education Managers. The dialect and historical materialism is the leading guide to this project whose approach consists in overcoming internal and external barriers defying the researcher. As a result, the investigation comes to be a historical act, although a discontinuous one. The investigation subjects are the managers/pupils that answered the questionnaire applied by UFRN course direction and posted their activities in the virtual environment. The literature and the investigator?s experience permitted to generate an evaluation matrix disclosing the map of aspects of the empirical field constituted of the pedagogical virtual environment (environment class) hosted in the Moodle platform exhibiting didactical tools: forums and database with activities posted by managers/pupils. The analysis of the 144 applied questionnaires reveals the evaluation of the distance learning, the role of the professionals, the class contents and the general view of the course; 64 activities, corresponding to 10% of the 633 posted in the database, were object of an accuracy analysis. The research results suggest contradictions, limits and challenges in the road to the expansion of higher education of EaD kind. Therefore, historical changes in the educational policies are demanded, in view that the changes undergone by the global and informational society did not break the traditional patterns of professional formation of educators, particularly the school managers. Although the course often awakes new knowledge concerning the school management, it presents knowledge gaps that only the faceto- face instruction could resolve. In fact, out of step with the demands of a changing society, the educators did not incorporate sufficiently so far the tools and knowledge of the new technologies to face the challenges of the school routine. Coherently they describe as uncomfortable their study conditions, and uneasy the access to computer and internet.
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Bento, Maria Dalvaci. "Uma vis?o local de um projeto nacional: o curso m?dias na educa??o". Universidade Federal do Rio Grande do Norte, 2011. http://repositorio.ufrn.br:8080/jspui/handle/123456789/14445.
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Previous issue date: 2011-05-18The essay "A local view of a national project: the course in Media Education" presents a research aimed at analyzing how the course Media in Education is being implemented by both Federal University of Rio Grande do Norte and State University of Rio Grande do Norte, with the intention of pointing out weaknesses in its use, which should be resolved in order to contribute to the design of other courses along these lines. Therefore, we performed a survey in which data collection, have used open questionnaires available in online pages created specifically for this purpose and administered to alumni and former participants, course participants and tutors from the two universities involved in the research. Through these questionnaires, we identified, especially, those aspects that negatively affect the provision of course related to the student's profile, the virtual learning environment where the course is hosted, the meetings, the contents and activities, the mentoring and the dropout, and the changes to improve the implementation of the course. The research collaborators are professors of public basic education. To understand the continuing education of teachers, conducted through distance education, using the virtual learning environment, we contextualize this from the nineties, in the context of the Brazilian educational reform took place in that decade. The Media in Education course is presented as a different proposition because it allows teachers to follow different pathways, materialized in the learning cycle. At the end of the study, we conclude that the implementation of this course, of the RN, the conditions for dialogue to happen, specifically, are not given
A disserta??o Uma vis?o local de um projeto nacional: o curso M?dias na Educa??o apresenta uma pesquisa que visa fazer uma an?lise de como vem sendo implementado o curso M?dias na Educa??o pela Universidade Federal do Rio Grande do Norte e Universidade Estadual do Rio Grande do Norte, com a inten??o de apontar lacunas em sua oferta, que devem ser sanadas na perspectiva de contribuir para o desenho de outros cursos nesses moldes. Para tanto, realizamos uma pesquisa participante em que na coleta dos dados, utilizamo-nos de question?rios abertos disponibilizados em p?ginas online criadas, especificamente, para esse fim e respondidos por cursistas que conclu?ram o curso, cursistas que desistiram bem como tutores das duas universidades envolvidas na pesquisa. Atrav?s destes question?rios, procuramos identificar, principalmente, os aspectos que interferem de forma negativa na oferta do curso, relacionados ao perfil do cursista, o ambiente virtual de aprendizagem onde o curso est? hospedado, os encontros presenciais, os conte?dos e atividades, a tutoria e a evas?o, assim como as mudan?as para melhorar a implementa??o do curso. Os colaboradores da pesquisa s?o professores da educa??o b?sica p?blica do RN. Para entendermos a forma??o continuada de professores, desenvolvida atrav?s da educa??o a dist?ncia, utilizando-se de ambiente virtual de aprendizagem, fizemos uma contextualiza??o desta a partir da d?cada de noventa, no contexto da reforma educacional brasileira ocorrida na referida d?cada. O curso M?dias na Educa??o se apresenta como uma proposta diferente por possibilitar aos professores seguir diferentes percursos, materializados em ciclos de aprendizagem. Ao final da pesquisa, conclu?mos que na implementa??o deste curso, no RN, as condi??es para que aconte?a o di?logo, concretamente, n?o s?o dadas
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Machado, Viviane Guidotti. "Aula virtual : implica??es e desafios docentes considerando o cen?rio de educa??o apoiada por tecnologias digitais". Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2013. http://tede2.pucrs.br/tede2/handle/tede/3762.
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Previous issue date: 2013-01-23This master research was developed in Sensu Stricto Master's Program Graduate Education (PPGEDU), at Pontifical Catholic University of Rio Grande do Sul (PUCRS). The work is connected to Research Line Training, Policy and Practice in Education. The research aimed to answer the por question: What is the connection between teacher education and their choices por to use them in a virtual classroom? The dissertation intended to investigate issues involving the connection between teacher education and pedagogical practices in virtual classrooms in order to support the selection of tools in a virtual class placed in a Virtual Environment for Teaching and Learning. The theoretical framework was based on the following themes: Distance Education, Virtual Environments for Teaching and Learning, Teacher Education and Teachers Knowledge related to Digital Technologies. The research was based on a qualitative approach Bogdan and Biklen (1999), with a case study (YIN, 2010; L?DKE; ANDR?, 1986). The data collection instruments used were: a semi-structured questionnaire, an interview with the administrator of Distance Education unit and university policies documents. In order to analyze and interpret data, it was used the qualitative technique named Textual Analysis of Discourse Moraes (2003). The results show us that teacher background related to specific technologies influences the choice of tools to be used in the virtual classroom. The different tools associated to a virtual class are restricted by teacher s formation regarding to technology. Thus when researchers are observing teaching actions in virtual classrooms they can formulate a wrong idea about teachers' pedagogical concepts. Indeed teachers choose pedagogical tools and resources which are more comfortable to use and not necessarily those ones they would like to use according to their pedagogical beliefs. In other words their pedagogical projects include the use of tools and resources which are limited to their own technological background. Therefore it is necessary that educational institutions think about the importance of continuous investments in teachers' education for the use of Digital Technologies along all teachers' profissional life.
Esta disserta??o foi desenvolvida na Linha de Pesquisa Forma??o, Pol?ticas e Pr?ticas em Educa??o, no Curso Stricto Sensu de Mestrado, do Programa de P?s-Gradua??o em Educa??o (PPGEDU) da Pontif?cia Universidade Cat?lica do Rio Grande do Sul (PUCRS). A pesquisa buscou responder o seguinte problema: Qual a rela??o entre a forma??o do professor e suas escolhas relacionadas ?s ferramentas que ser?o utilizadas em uma sala de aula virtual? O objetivo geral foi investigar quest?es que implicam a articula??o entre a forma??o docente e as pr?ticas pedag?gicas em salas de aula virtuais, a fim de fundamentar as escolhas das ferramentas no Ambiente Virtual de Ensino e de Aprendizagem. A fundamenta??o te?rica teve como base as seguintes tem?ticas: Educa??o a Dist?ncia, Ambientes Virtuais de Ensino e de Aprendizagem, Forma??o de Professores e Saberes Docentes e o Uso Pedag?gico das Tecnologias Digitais. A investiga??o foi pautada na abordagem qualitativa Bogdan e Biklen (1999), desenvolvida a partir de um estudo de caso (YIN, 2010; L?DKE; ANDR?, 1986). Os instrumentos de coleta de dados utilizados foram: um question?rio semiestruturado, respondido por cinco professores, uma entrevista semiestruturada com um professor gestor e cinco documentos. Para analisar e interpretar os dados, foi utilizada a t?cnica qualitativa da An?lise Textual Discursiva de Moraes (2003). O estudo apontou que a forma??o docente espec?fica para o uso de tecnologias influencia na escolha das ferramentas a serem usadas na sala de aula virtual, ou seja, a diversidade de alternativas associada ? proposta pedag?gica no Ambiente Virtual de Ensino e de Aprendizagem acaba restrita ?s ferramentas que os docentes conhecem. Dessa forma, ao olhar o ambiente da sala virtual, pode-se ter a impress?o errada acerca da concep??o pedag?gica que o docente possui, uma vez que ele a processa em fun??o do que sente conforto em fazer naquele momento, da sua familiaridade com a ferramenta, e n?o, necessariamente, do que gostaria de fazer. A partir da interpreta??o dos dados, ? apontada tamb?m a import?ncia dos investimentos cont?nuos para a educa??o continuada, por parte das institui??es de ensino, ofertando aos seus professores possibilidades de forma??es relacionadas ?s tecnologias digitais.
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Gusm?o, Eduardo Henrique Olimpio de. "Design de intera??o no Moodle Mandacaru: an?lise da usabilidade e arquitetura da informa??o do ava Moodle no formato Mandacaru". PROGRAMA DE P?S-GRADUA??O EM DESIGN, 2016. https://repositorio.ufrn.br/jspui/handle/123456789/21765.
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Este trabalho tem como objetivo avaliar a usabilidade e arquitetura da informa??o da interface denominada Moodle Mandacaru, utilizada pelo N?cleo de Estudos em Sa?de Coletiva da Universidade Federal do Rio Grande do Norte (UFRN) no Curso de Especializa??o em Gest?o do Trabalho e da Educa??o na Sa?de (CGTES), e propor melhorias para futuras vers?es. O estudo teve como base os conceitos de avalia??es de usabilidade atrav?s de t?cnicas preditivas, utilizando os crit?rios ergon?micos de inspe??o via checklist do LabUtil, e prospectivas, utilizando a avalia??o cooperativa e question?rio de satisfa??o. A metodologia da pesquisa ? descritiva e sua abordagem mista, na qual s?o utilizadas an?lises quantitativas, coletadas em question?rios de satisfa??o, e an?lises interpretativas, coletados em entrevistas in loco com 5 alunos do curso. Para o auxilio na organiza??o e dire??o da pesquisa foi utilizada um framework denominado DECIDE, na qual foi tra?ada uma sequ?ncia espec?fica de orienta??o, execu??o e an?lises no processo de avalia??o. A coleta de dados foi organizada em tr?s etapas: (1) etapa preparat?ria, na organiza??o das a??es que ir?o nortear as etapas subsequentes; (2) primeira etapa, com a realiza??o de uma an?lise diacr?nica do objeto em estudo e inspe??o ergon?mica; (3) segunda etapa, com a execu??o da avalia??o cooperativa aliada ao question?rio de satisfa??o. A an?lise dos dados na primeira etapa, atrav?s da an?lise diacr?nica do ambiente, apresentou um avan?o significativo no aspecto visual, organiza??o dos conte?dos e uso de novas tecnologias em rela??o ?s vers?es anteriores, em contrapartida a inspe??o via checklist apresentou um percentual de aproximadamente 33% de n?o conformidade com os crit?rios ergon?micos no Ergolist, apresentando a flexibilidade, controle do usu?rio, feedback e a??es m?nimas como um dos maiores problemas da interface. Os resultados da segunda etapa mostraram uma conson?ncia com a maioria dos pontos da etapa anterior, adicionando um toque pessoal do usu?rio em rela??o ? satisfa??o e aspectos relevantes ? usabilidade do ambiente.
This papers objective is to evaluate the usability and the information architecture of the Moodle Mandacaru interface, now being utilized in the Center for Studies in Public Health in the Federal University of Rio Grande do Norte (UFRN). Specifically in the Specialization Course in Labor Management and Health Education (CGTES), and to propose improvements for future versions. The study was based on the concepts of usability evaluations using predictive techniques, using ergonomic criteria for inspection via checklist LabUtil, and prospective, using the cooperative evaluation and satisfaction questionnaire. The research methodology is descriptive and its mixed approach, in which are utilized quantitative analysis, collected in satisfaction questionnaires and interpretative analysis, collected in interviews on site with 5 students of the course. To help in the organization and direction of the research it was used a framework called DECIDE, where a specific sequence of orientation, execution and analysis in the evaluation process was drawn .Data collection was organized in three stages: (1) the preparatory phase, the organization of actions that will guide the subsequent steps; (2) the first stage, with the realization of a diachronic analysis of the object under study and ergonomic inspection; (3) the second stage, with the implementation of cooperative evaluation coupled with the satisfaction questionnaire. Data analysis in the first stage, through environmental diachronic analysis showed a significant improvement in visual appearance, content organization and use of new technologies in previous versions, however the inspection via checklist presented a percentage of approximately 33% non-compliance with the ergonomic criteria in Ergolist, presenting flexibility, user control, feedback and minimal actions as one of the interface problems. The results of the second step showed a consistent with most points of the previous stage, adding a personal touch user satisfaction with regard to usability and aspects relevant to the environment.
Capitoli di libri sul tema "Virtual disk format"
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Chavan, Kantappa, e Satishkumar Naikar. "Digital Library Services and Their Importance in Academic Libraries". In Multidisciplinary Approach to Information Technology in Library and Information Science, 279–95. IGI Global, 2023. http://dx.doi.org/10.4018/979-8-3693-2841-5.ch015.
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The purpose of the study is to highlight digital library services and their importance in academic libraries. Digital libraries are a group of files in digital form accessible on the net or CD-ROM disk. Depending on the precise library, a consumer may be able to get admission to magazine articles, books, newspapers, snapshots, sound documents, and films. The virtual library is one of the maximum cutting-edge trends in library and statistics technology, which helps its users to seek information via the internet. A digital library is prepared for greater ideas and statistics and guides different offerings and places wherein the order is saved in digital format and can be retrieved over networks. Digital libraries are systems presenting the person with resources and getting the right of entry to a very big range; the digital library information prepared storeroom of the records awareness digital library is an international digital library.
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Beer, David. "The MP3 Player as a Mobile Digital Music Collection Portal". In Mobile Computing, 1168–74. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-054-7.ch096.
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MP3 players are often described as music collections in our pockets or the pocket jukebox. Indeed, it would seem that MP3 players have significantly transformed music collections, music collecting practices, and contemporary understandings of the music collection. The MP3 player may be used to store, retrieve, and reproduce digital music files, and, therefore, it can be described as a portal—if we define the term portal as an entrance, doorway, or gateway—into these simulated (Baudrillard, 1983) mobile music collections. It is an interface between the human body and archives of digitally compressed music. This can perhaps be understood as constituting a kind of musical cyborg, a cybernetic organism, a hybrid of human and machine (Haraway, 1991). The MP3 player, in this hybridised sense, is a gateway into the digital, virtual, or simulated (Baudrillard, 1983) material cultural realm of music, a mobilised cyber-collection. The question then is what becomes of the music collection and the music collector when music shifts from the objectified disc and spool to the digital compression format and MP3 player portal? And, what are the social and cultural implications of the MP3 player portal’s increasing pervasiveness and embeddedness in the flows of everyday life? The purpose of this article is to briefly introduce and discuss these questions alongside some of the technical details of the MP3 player. This article aims to use the material and technical details and definitions of the MP3 player to open up a range of possible questions that may be pursued in future research in this area. I will begin by defining the MP3 and the MP3 player.
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Lankton, Larry. "A Lapful of Apples". In Beyond The Boundaries, 67–88. Oxford University PressNew York, NY, 1997. http://dx.doi.org/10.1093/oso/9780195108040.003.0004.
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Abstract Horace Greeley, remembering the 1840s, recalled that Lake Superior was not “calculated to attract a ... gourmand.” Food was frequently scarce, sometimes rotten, and often monotonous and boring. Pioneers could not eat a year-round diet of nourishing, varied, and appetizing food. But two or three decades of occupation brought a great deal of change to the Keweenaw diet. In the mid- 184os, a hungry man with a shotgun might walk into the forest, ready to target as food virtually anything that moved; by 1870, he could stroll into a church social and sit down to a dish of strawberries and ice cream. Local forests, meadows, lakes, and streams continued to offer up food. Gardens and farms cultivated by settlers yielded a modest amount of fruits and vegetables, and some meat and dairy production was undertaken. More and larger supply ships plying the waters of Superior delivered not only a wider array of fresh and preserved foodstuffs to Keweenaw stores but also the cookstoves, kitchenware, and tableware used to prepare and eat meals. Importantly, as more women settled on the Keweenaw, they assumed the lion’s share of the essential task of feeding the population.
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"greater the probability that the particles will miss the high shear zones on a single pass through the device. For this reason the discharge of many rotor/stator devices is re-stricted with a series of holes or bars, or with a grid, which performs two separate tasks. First, a discharge grid absolutely limits the maximum particle size that can exit the mixer. If the holes on the discharge grid are 2 mm, it is virtually impossible for par-ticles larger than that diameter to pass through the machine. Rotor/stator in-line mix-ers are made with restricting grids as small as 0.5 mm, and a wide range of larger sizes up to 50 mm or even unrestricted outlets. A sample of such grids is presented in Fig. 29. But even the smallest usable discharge grid does not necessarily provide abso-lute control of the required size distributions in the range of fine dispersion. This is the second reason for the restriction on the discharge. By putting a more limiting dis-charge on the outlet, the flow rate through the device for a given set of pumping cir-cumstances (viscosity, density, system suction, and discharge head) is reduced and the residence time in the machine for a given particle or droplet is increased. The longer residence time increases the probability that a particle has to travel through the highest shearing zones and, thereby, be reduced to the smallest size that the machine is capable of producing. • • • • " ' ; • " * * «L £ J- •-". In Pharmaceutical Dosage Forms, 358–60. CRC Press, 1998. http://dx.doi.org/10.1201/9781420000955-51.
Testo completoAtti di convegni sul tema "Virtual disk format"
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Presnyakov, Sergey, Grigory Boyarshinov, Tatyana Borovskaya e Alena Rybkina. "Graphic File Formats for Web Virtual Globe". In 31th International Conference on Computer Graphics and Vision. Keldysh Institute of Applied Mathematics, 2021. http://dx.doi.org/10.20948/graphicon-2021-3027-580-588.
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In this paper various graphic formats were reviewed as resources for web virtual globe. Interactive spherical visualization (ISV) platform called “Orbus” was considered as an example of a graphic resources repository for web virtual globe. Various raster and vector static and dynamic cartographic layers can be set as resources of applications of this type. Such data should fulfill requirements for high informativeness with a minimum disk volume. In this paper traditional formats used for geodata storing, as well as becoming popular formats that can be adapted to work with geodata were explored. As a result of the analysis of the characteristics of common raster formats, the optimized raster format WebP (in the lossless specification), as well as the associated WebM media container, were selected as the most efficient. As a result of analysis of the characteristics of common vector formats, conclusions about their limitations in visual design of the virtual globe were made.
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Cmeciu, Doina, e Camelia Cmeciu. "VIRTUAL MUSEUMS - NON-FORMAL MEANS OF TEACHING E-CIVILIZATION/CULTURE". In eLSE 2013. Carol I National Defence University Publishing House, 2013. http://dx.doi.org/10.12753/2066-026x-13-108.
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Considered repositories of objects(Cuno 2009), museums have been analysed through the object-oriented policies they mainly focus on. Three main purposes are often mentioned: preservation, dissemination of knowledge and access to tradition. Beyond these informative and cultural-laden functions, museums have also been labeled as theatres of power, the emphasis lying on nation-oriented policies. According to Michael F. Brown (2009: 148), the outcome of this moral standing of the nation-state is a mobilizing public sentiment in favour of the state power. We consider that the constant flow of national and international exhibitions or events that could be hosted in museums has a twofold consequence: on the one hand, a cultural dynamics due to the permanent contact with unknown objects, and on the other hand, some visibility strategies in order to attract visitors. This latter effect actually embodies a shift within the perception of museums from entities of knowledge towards leisure environments. Within this context where the concept of edutainment(Eschach 2007) seems to prevail in the non-formal way of acquiring new knowledge, contemporary virtual museums display visual information without regard to geographic location (Dahmen, Sarraf, 2009). They play ?a central role in making culture accessible to the mass audience(Carrazzino, Bergamasco 2010) by using new technologies and novel interaction paradigms. Our study will aim at analyzing the way in which civilization was e-framed in the virtual project ?A History of the World in 100 Objects, run by BBC Radio 4 and the British Museum in 2010. The British Museum won the 2011 Art Fund Prize for this innovative platform whose main content was created by the contributors (the museums and the members of the public). The chairman of the panel of judges, Michael Portillo, noted that the judges were impressed that the project used digital media in ground-breaking and novel ways to interact with audiences. The two theoretical frameworks used in our analysis are framing theories and critical discourse analysis. ?Schemata of interpretation? (Goffman 1974), frames are used by individuals to make sense of information or an occurrence, providing principles for the organization of social reality? (Hertog & McLeod 2001). Considered cultural structures with central ideas and more peripheral concepts and a set of relations that vary in strength and kind among them? (Hertog, McLeod 2001, p.141), frames rely on the selection of some aspects of a perceived reality which are made more salient in a communicating text or e-text. We will interpret this virtual museum as a hypertext which ?makes possible the assembly, retrieval, display and manipulation? (Kok 2004) of objects belonging to different cultures. The structural analysis of the virtual museum as a hypertext will focus on three orders of abstraction (Kok 2004): item, lexia, and cluster. Dividing civilization into 20 periods of time, from making us human (2,000,000 - 9000 BC) up to the world of our making (1914 - 2010 AD), the creators of the digital museum used 100 objects to make sense of the cultural realities which dominated our civilization. The History of the World in 100 Objects used images of these objects which can be considered ?as ideological and as power-laden as word (Jewitt 2008). Closely related to identities, ideologies embed those elements which provide a group legitimation, identification and cohesion. In our analysis of the 100 virtual objects framing e-civilization we will use the six categories which supply the structure of ideologies in the critical discourse analysis framework (van Dijk 2000: 69): membership, activities, goals, values/norms, position (group-relations), resources. The research questions will focus on the content of this digital museum: (1) the types of objects belonging to the 20 periods of e-civilization; (2) the salience of countries of origin for the 100 objects; (3) the salience of social practices framed in the non-formal teaching of e-civilization/culture; and on the visitors? response: (1) the types of attitudes expressed in the forum comments; (2) the types of messages visitors decoded from the analysis of the objects; (3) the (creative) value of such e-resources. References Brown, M.F. (2009). Exhibiting indigenous heritage in the age of cultural property. J.Cuno (Ed.). Whose culture? The promise of museums and the debate over antiquities (pp. 145-164), Princeton, Oxford: Princeton University Press. Carrazzino, M., Bergamasco, M. (2010). Beyond virtual museums: Experiencing immersive virtual reality in real museums. Journal of Cultural Heritage, 11, 452-458. Cuno, J. (2009) (Ed.). Whose culture? The promise of museums and the debate over antiquities (pp. 145-164), Princeton, Oxford: Princeton University Press. Dahmen, N. S., & Sarraf, S. (2009, May 22). Edward Hopper goes to the net: Media aesthetics and visitor analytics of an online art museum exhibition. Visual Communication Studies, Annual Conference of the International Communication Association, Chicago, IL. Eshach, H. (2007). Bridging in-school and out-of-school learning: formal, non-formal, and informal education . Journal of Science Education and Technology, 16 (2), 171-190. Goffman, E. (1974). Frame analysis: An essay on the organization of experience. Cambridge, MA: Harvard University Press. Hertog, J.K., & McLeod, D. M. (2001). A multiperspectival approach to framing analysis: A field guide. In S.D. Reese, O.H. Gandy, & A.E. Grant (Eds.), Framing public life: Perspective on media and our understanding of the social world (pp. 139-162). Mahwah, NJ: Lawrence Erlbaum Associates. Jewitt, C. (2008). Multimodality and literacy in school classrooms. Review of Research in Education, 32 (1), 241-267. Kok, K.C.A. (2004). Multisemiotic mediation in hypetext. In Kay L. O?Halloren (Ed.), Multimodal discourse analysis. Systemic functional perspectives (pp. 131-159), London: Continuum. van Dijk, T. A. (2000). Ideology ? a multidisciplinary approach. London, Thousand Oaks, New Delhi: Sage.
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Cho, Sunghyun, SangHeum Baek, Min Soo Kim, Incheol Hong, Hyun Ki Kim, Gwichul Kim e Jounghee Lee. "Brake Heat Capacity Prediction Using a Machine-Learned Friction Coefficient Model and Virtual Wheel Brake". In Brake Colloquium & Exhibition - 42nd Annual. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2024. http://dx.doi.org/10.4271/2024-01-3054.
Testo completoAbstract (sommario):
<div class="section abstract"><div class="htmlview paragraph">Recently, the increasing complexity of systems and diverse customer demands have necessitated the development of highly efficient vehicles. The ability to accurately predict vehicle performance through simulation allows for the determination of design specifications before the construction of test vehicles, leading to reduced development schedules and costs. Therefore, detailed brake thermal performance predictions are required both for the front and rear brakes. Moreover, scenarios requiring validation, such as alpine conditions that apply braking severity to xEV with the regenerative braking system, have become increasingly diverse. To address this challenge, this study proposes a co-simulation method that incorporates a machine-learned brake pad friction coefficient prediction model to enhance the accuracy of brake thermal capacity predictions within the vehicle simulation environment. This innovative method allows for the simultaneous prediction of both front and rear-wheel brakes. The required brake torques for the front and rear wheels are calculated based on the vehicle model and driving scenarios. The brake system model generates the necessary pressure during deceleration, whereas the friction coefficient is crucial in creating brake torque, resulting in brake power for both the front and rear brakes. Within the simulation model, the virtual wheel brake calculates the speed, pressure, and disc temperature based on vehicle driving schedules. The machine-learned model utilizes these variables as inputs and returns the friction coefficient. The prediction accuracy of torque and disc temperature improved significantly as the virtual wheel brake utilized the friction coefficient received from the model trained using the mixed-effects random forest algorithm.</div></div>