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Multi-GPU Rendering with the open Vulkan API
Get PDFThe Vulkan API provides a low level interface to modern Graphics Processing Units (GPUs). We demonstrate how to use Vulkan to send commands explicitly to separate GPUs for implementing platform,- and vendor independent multi-GPU rendering. We describe how to implement the sort-first and sort-last approaches to perform parallel rendering with Vulkan. We introduce an abstraction library which we have made available, and an application for multi-GPU rendering of meshes. Performance benchmarks have been performed in order to evaluate the implementation. We also show that we can utilize the additional GPU memory from multiple GPUs to render larger data sets than possible with a single GPU
Effect of Data from Neighbouring Regions to Forecast Dengue Incidences in Different Regions of Philippines Using Artificial Neural Networks
Get PDFDisease outbreaks forecasting is a vital component in public-health resource planning and emergency preparedness. However, the existing procedures have limitations due to the lack of analytical knowledge about spatiotemporal data. In this paper, we investigate how spatiotemporal data can be leveraged to forecast future disease outbreaks, using dengue incidences in the Philippines for demonstration purposes. Our approach is based on identifying highly correlated regions and using inputs from these regions to train and forecast dengue incidences using Artificial Neural Networks. We then removed the spatial aspect, focusing separately on each region to measure the effect of introducing spatial data. In all the experiments, monthly dengue incidences in 2016 were used as the testing data. Our empirical results show that including spatial data reduces the Mean Absolute Error by approx. 54 % compared to only using data from the target region. We conclude that adding data from neighbouring regions for forecasting can enhance the traditional approaches for forecasting dengue outbreaks, and we recommend that a spatio-temporal analysis is introduced as a standard component of disease outbreak forecasting
Studentaktivisering gjennom bruk av hverandrevurdering for førstesemesters studenter i Canvas LMS: en forsøksstudie
Get PDFI denne forsøksstudien har vi gjennomført hverandrevurdering på et førsteårs-emne i informatikk. Hverandrevurdering fremheves i forskningen som en metode for å aktivisere studentene, og å styrke deres læring og metakognisjon. Ikke minst kan det å vurdere andres faglige prestasjoner være en måte for begynnerstudenter å utvikle innsikt i de faglige kriteriene og arbeidsmåtene i faget. Det kan også bidra til deres forståelse av egen læringsprosess og hvordan de best kan jobbe med studiene. Vi brukte Canvasfunksjonen Rubrics og SpeedGrader til å administrere hverandrevurdering av 524 studentbesvarelser. Det vi ønsket å undersøke var hvordan studentene erfarte denne typen læringsaktivitet; hvorvidt studentenes vurderinger var i tråd med faglærers vurdering; på hvilken måte og i hvilken grad hverandrevurderingen bidro til studentenes læring; samt hvordan data generert gjennom denne aktiviteten gir informasjon til faglærer som kunne brukes til å forbedre og tilpasse undervisningen. Til tross for enkelte tekniske mangler og utfordringer ga forsøket mange positive resultater
Editorial
Get PDFWe are very pleased to present the latest issue (Volume 9, Number 2, December 2017) of the e-Journal of the International Association for Research on Textbooks and Educational Media. This second issue of the ninth volume contains four papers written by researchers from different countries
Analysis of Feature-Completeness in Android Cross-Platform Frameworks
Get PDFIn cross-platform mobile development research, we frequently encounter mentions of limitations and constraints potentially imposed by technical tools and development frameworks.This is especially prominent in the context of programmatic device- and platform feature access, including features such as GPS, Internet and device camera access.Although the majority of the literature does not empirically validate these claims, they have reached acceptance in both practitioners' communities and academic research.By downloading a sample of 300,000 Android applications available on the Google Play Store and analysing them, we set forth to find which platform- and device features are the most commonly included in deployed apps.Based on the results, we map the features to their availability in five major cross-platform development frameworks, thus provide an overview of feature completeness and potential shortcomings in these popular frameworks.Our findings indicate that the scrutinised frameworks range from 86.37% to 95.46% feature-completeness and can thus facilitate the development of mobile apps relying on features that are commonly found in our assessed sample of Android apps
Aggregation of probabilisitic logically related judgments
Get PDFInformation aggregation is at the core of many problems in computer science. Judgement aggregation models multi-agent decision making by aggregating individual opinions from various sources. It does however assume that the sources are certain in their opinions and also subject to the same logical constraints. We relax both of these assumptions and build a more general framework with uncertain information sources that we model in probabilistic logic. We also propose aggregation functions for this new framework
Full Approximation Scheme for Reservoir Simulation
Get PDFSimulation of multiphase flow and transport in porous rock formations give rise to large systems of strongly coupled nonlinear equations. Solving these equations is computationally challenging because of orders of magnitude local variations in parameters, mixed hyperbolic-elliptic governing equations, grids with high aspect ratios and strong coupling between local and global flow effects. The state-of-the-art solution approach is to use a Newton-type solver with a algebraic multigrid preconditioner for the elliptic part of a linearized system. Herein, we discuss the use and implementation of a Full Approximation Scheme (FAS) in which algebraic multigrid is applied on a nonlinear level. By use of this method, global and semi-global nonlinearities can be resolved on the appropriate coarse scale. Improved nonlinear convergence is demonstrated on standard benchmark cases from the petroleum literature. The method is implemented in the solver framework of the open-source Matlab Reservoir Simulation Toolbox (MRST). 
Evaluation of team dynamics in Norwegian projects for IT students
Get PDFThe need for teaching realistic software development in project courses has increased in a global scale. It has always been challenges in cooperating fast-changing software technologies, development methodologies and teamwork. Moreover, such project courses need to be designed in the connection to existing theoretical courses. We performed a large-scale research on student performance in Software Engineering projects in Norwegian universities. This paper investigates four aspects of team dynamics, which are team reflection, leadership, decision making and task assignment in order to improve student learning. Data was collected from student projects in 4 years at two universities. We found that some leader’s characteristics are perceived differently for female and male leaders, including the perception of leaders as skillful workers or visionaries. Leadership is still a challenging aspect to teach, and assigned leadership is probably not the best way to learn. Students are performing well in task review, however, needs support while performing task assignment. The result also suggests that task management to be done in more fine-grained levels. It is also important to maintain an open and active discussion to facilitate effective group decision making
Homework-based learning resources: two distinct approaches to design and development
Get PDFHomework can be described as an enculturated expectation of our schooling discourse both nationally and internationally (Horsley & Walker, 2013). There are universal understandings about homework. From country to country, classroom teachers respond to government homework policy to set homework for theirstudents, mostly using textbooks as the source of homework activity. However, in Australian primary school classrooms, the provision of homework tasks is not generally supported by the use of textbooks or by textbook activities. Rather, the classroom teacher is responsible for the design and the development of homeworkbased learning resources. This paper presents qualitative research that examined the ways in which, and the influences on, the processes used by primary classroom teachers in Queensland (Australia), to design and develop homework tasks. This paper foregrounds two distinct approaches to homework design and development that emerged through the findings; an early years’ teacher orientation and a middle years’ teacher orientation. These findings are significant because teacher homework practices have not been examined in this way before.Se puede describir la tarea de casa como una expectativa aculturada de nuestro discurso escolar de manera nacional así como internacionalmente (Horsley y Walker, 2013). Hay entendimiento universal acerca de las tareas de casa. De país en país, los maestros del aula responden a la política gubernamental sobre la tarea de casa para determinar las tareas para sus estudiantes, en la mayoría de los casos utilizando los libros didácticos como fuente de las actividades para las mismas. Sin embargo, en las aulas de escuelas primarias en Australia, la disponibilidad de las tareas de casa no se apoya normalmente en el uso del libro didáctico o de sus actividades. En cambio, el profesor en el aula es responsable del planeamiento y de la elaboración de los recursos de aprendizaje basados en la tarea de casa. Esta investigación cualitativa presenta el análisis de los procesos utilizados para los profesores de las clases de escuelas primarias en Queensland (Australia) para concebir y para desarrollar tareas de casa, así como su influencia en estos procesos. Este artículo destaca dos abordajes distintos para planear y para elaborar la lección de casa acentuadas durante la investigación; una orientación para los años iniciales y otra por los años secundarios. Estos descubrimientos son significativos, una vez que las prácticas de los profesores en lo que se refiere a la tarea de casa no han sido examinadas de esta manera hasta el momento.sido examinadas de esta manera hasta el momento.que las prácticas de los profesores en lo que se refiere a la tarea de casa no hansido examinadas de esta manera hasta el momento.y otra por los años secundarios. Estos descubrimientos son significativos, una vezque las prácticas de los profesores en lo que se refiere a la tarea de casa no hansido examinadas de esta manera hasta el momento.A lição de casa pode ser descrita como uma expectativa aculturada de nosso discurso escolar tanto nacional quando internacionalmente (Horsley & Walker, 2013). Existem compreensões universais sobre a lição de casa. De país em país, os professores de sala de aula respondem à política governamental sobre lição de casa para determinar as tarefas para seus estudantes, na maioria dos casos utilizando livros didáticos como fonte de atividades para as mesmas. Entretanto, nas salas de aula de escolas primárias na Austrália, a disponibilização de tarefas de casa não é normalmente apoiada no uso do livro didático ou suas atividades. Ao contrário, o professor na sala de aula é responsável pelo planejamento e elaboração dos recursos de aprendizagem baseados na lição de casa. Esta pesquisa qualitativa apresenta a análise dos processos usados pelos professores de turmas de escolas primárias em Queensland (Austrália) para conceber e desenvolver tarefas de casa, assim como a sua influência nestes processos. Este artigo enfatiza duas abordagens diferentes para planejar e elaborar a lição de casa, apontadas durante a pesquisa; uma orientação para os anos iniciais e outra para os anos secundários. Estas descobertas são significativas, uma vez que as práticas dos professores em relaçãoà tarefa de casa não foram examinadas dessa maneira até o momento
Brazilian high school Physics textbooks: Students’ opinions on features, themes and focus
Get PDFThe objective of this paper is to identify, according to the opinion of Brazilian high school students, the most and least important features of Physics textbooks and their preferred topics and foci. For this purpose, a cross-sectional survey was conducted, with questions based on previous qualitative studies. The data was collected through questionnaires answered by 374 students from five regions in Brazil, between 2012 and 2014. With this data, it was possible to show that the most important feature is a textbook without conceptual errors and the least important one is its weight. Among the themes and foci, the most important is the exercises for the university admission test and the least important one is the biographies. However, there are many differences in responses among sample subsets, such as age, type of school and, especially, gender. Boys are more interested in a mathematical approach and technology, among others, and girls are more interested in digital multimedia content and artistic works.Este trabajo tiene como objetivo identificar, según los estudiantes brasileños de secundaria, las cualidades más y menos importantes de un libro de texto de física y qué temas y enfoques son preferidos. Para esto, se realizó una investigación transversal del tipo survey, con preguntas basadas en estudios cualitativos anteriores. Los datos fueron colectados a través de un cuestionario respondido por 374 estudiantes, de lascinco regiones brasileñas, entre el 2012 y el 2014. La cualidad más importante, según ellos, es que el libro de texto no tenía errores conceptuales y la menos significativa, su peso. Entre los temas y enfoques, los más importantes son los ejercicios de vestibular y ENEM, los de menor importancia son las biografías. Sin embargo, hay varias diferencias de respuestas entre los subconjuntos de la muestra, como edad, tipo de escuela y, en particular, género. Los chicos se interesan más por un enfoque matemático y tecnológico, entre otros y las niñas por contenido multimedia digital y obras de arte. tipo de escuela y, en particular, género. Los chicos se interesan más por un enfoque matemático y tecnológico, entre otros y las niñas por contenido multimedia digital y obras de arte.O objetivo desse artigo é identificar, na opinião dos estudantes brasileiros de Ensino Médio, quais as qualidades mais e menos importantes de um livro didático de Física e quais os temas e focos preferidos. Para isso, foi feita uma pesquisa transversal do tipo survey, com perguntas baseadas em estudos qualitativos anteriores. Os dados foram coletados por meio de questionários aplicados a 374 estudantes das cincoregiões brasileiras, entre 2012 e 2014. A qualidade mais importante é o livro não ter erros conceituais e a menos importante foi o seu peso. Entre os temas e focos, os mais importantes são os exercícios de vestibular e ENEM, o menos importante são biografias. Contudo, há várias diferenças de respostas entre os subconjuntos da amostra, como idade, tipo de escola e, em especial, gênero. Meninos se interessam mais entre outros, por um enfoque matemático e tecnologia, e meninas por conteúdomultimídia digital e obras artísticas