Search results for "Graphics"
showing 10 items of 1223 documents
Systematic implementation of higher order Whitney forms in methods based on discrete exterior calculus
2022
AbstractWe present a systematic way to implement higher order Whitney forms in numerical methods based on discrete exterior calculus. Given a simplicial mesh, we first refine the mesh into smaller simplices which can be used to define higher order Whitney forms. Cochains on this refined mesh can then be interpolated using higher order Whitney forms. Hence, when the refined mesh is used with methods based on discrete exterior calculus, the solution can be expressed as a higher order Whitney form. We present algorithms for the three required steps: refining the mesh, solving the coefficients of the interpolant, and evaluating the interpolant at a given point. With our algorithms, the order of…
Collision Avoidance with Potential Fields Based on Parallel Processing of 3D-Point Cloud Data on the GPU
2014
In this paper we present an experimental study on real-time collision avoidance with potential fields that are based on 3D point cloud data and processed on the Graphics Processing Unit (GPU). The virtual forces from the potential fields serve two purposes. First, they are used for changing the reference trajectory. Second they are projected to and applied on torque control level for generating according nullspace behavior together with a Cartesian impedance main control loop. The GPU algorithm creates a map representation that is quickly accessible. In addition, outliers and the robot structure are efficiently removed from the data, and the resolution of the representation can be easily ad…
Problem-Based Learning in Professional Studies from the Physiotherapy Students’ Perspective
2018
The aim of the study was to investigate how physiotherapy students using a problem-based learning approach develop into experts during higher education, and answers the question: How do physiotherapy students at bachelor’s level understand the problem-based learning approach while learning to become professionals? PBL is examined using interpretative phenomenological analysis (IPA) of longitudinal data written by 15 voluntary students from two different higher education institutions and collected during 3.5 years. The main results on the new way of learning strengthen earlier conceptions of the importance of reflection in the learning process. The PBL method activates a reflection process b…
VegItaly: The Italian collaborative project for a national vegetation database
2012
Abstract Two years after its official start, the national vegetation database VegItaly, a collaborative project supported by the Italian scientific community and developed by a large group of scientists, is presented. This article offers a concise overview of the content of the database, currently consisting of 31,100 vegetation plot, including published and unpublished data. Some basic statistics are analysed; for example, data distribution in space and time, represented vegetation types expressed as physiognomic categories. Although rather young and still in progress, VegItaly already contains data from all the Italian regions and stands as an optimal candidate for the development of an I…
Enhanced chain dynamics in loop-sorting-systems by means of layout optimization and a kinematic model of the polygon action
2012
Published version of an article in the journal: Structural and Multidisciplinary Optimization. Also available from the publisher at: http://dx.doi.org/10.1007/s00158-011-0743-7 Poor dynamics owing to polygon action is a known concern in mechanical applications of closed articulated chains. In this paper a kinematic model of the polygon action in large chains of loop-sorting-systems is proposed. Through optimization techniques the chain dynamics is improved by minimizing the polygon action using a parametric model of the track layout as design variables. Three formulations of the kinematic polygon action are tested on an average sized planer tracks layout to find a superior model. Verificati…
Exploring the critical incident technique to encourage reflection during project-based learning
2017
Previous research has reported on the challenge of promoting students' generic reflection during authentic project-based courses. This work explores a teaching intervention based on Flanagan's Critical Incident Technique (CIT) during a project-based software development course. The intervention aims at increasing students' awareness of their own learning and at encouraging reflective practice throughout the project. Students were asked to report on 'incidents' when they experienced learning during the course, and to reflect on the task itself at the end of the course. The present study focuses on how students approached the incident reporting task and how they perceived it. The results indi…
Computing Subdivision Surface Intersection
2003
Computer surface intersections is fundamental problem in geometric modeling. Any Boolean operation can be seen as an intersection calculation followed by a selection of parts necessary for building the surface of the resulting object. This paper deals with the computing of intersection curveson subdivision surfaces (surfaces generated by the Loop scheme). We present three variants of our algorithm. The first variant calculates this intersection after classification of the object faces into intersecting and non-intersecting pairs of faces. the second variant is based on 1-neighborhood of the intersecting faces. The third variant uses the concept of bipartite graph.
Students’ Experiences of Reflective Writing as a Tool for Learning in Physiotherapy Education
2015
The purpose of this study was to examine physiotherapy students’ experiences of reflective writing. The students (n = 32) were asked to video record their practical activities at school and at workplaces, and to write reflective journals on their experiences. The research data about students’ experiences of reflective writing were collected by interviewing the students. The data were analyzed phenomenographically. The findings revealed four qualitatively different experiences of reflective writing: 1) writing as a useless task; 2) writing as a tool for deepening understanding; 3) writing as a tool for self-reflection; and 4) writing as a tool for professional development. These categories d…
HISTORY OF THE CHILDHOOD : THE REFLECTION OF THE TEACHER ’ S IMAGE IN DOLLS
2015
The toys are an indispensible part of the childhood. They influence the formation of the child’s conceptions because through them the child perceives and learns about the world. Dolls are toys that have not lost their topicality since the origins of the humankind. As the visual information dominates it is important what information is expressed by dolls-teachers because children will arrive at school having already some notions about the teacher. This can influence children’s relations with the teacher and the school. The aim of the article is to analyze the image of dolls – teachers. The used methods are the analysis of literature and material/visual sources. Pictures of 207 teachers- doll…