Search results for "Rack"
showing 10 items of 1397 documents
Experiences from the Use of an Eye-Tracking System in the Wild
2010
Eye-tracking systems have been widely used as a data collection method in the human–computer interaction research field. Eyetracking has typically been applied in stationary environments to evaluate the usability of desktop applications. In the mobile context, user studies with eye-tracking are far more infrequent. In this paper, we report our findings from user tests performed with an eye-tracking system in a forest environment. We present some of the most relevant issues that should be considered when planning a mobile study in the wild using eye-tracking as a data collection method. One of the most challenging finding was the difficulty in identifying where the user actually looked in th…
Eye-tracking the Effects of Representation on Students' Problem Solving Approaches
2017
This study used an eye-tracking method to explore students’ approaches to solving the same task in different representations and the differences between students who answered correctly and those who answered incorrectly when solving the problems. Thirty-one upper secondary students took part in the study. According to the results of this study, the representation has a slight effect on students’ problem solving processes. Students with the incorrect answers paid more attention to the parts of the tasks with information irrelevant to determining the solution to the task. peerReviewed
A fast dual boundary element method for 3D anisotropic crack problems
2009
In the present paper a fast solver for dual boundary element analysis of 3D anisotropic crack problems is formulated, implemented and tested. The fast solver is based on the use of hierarchical matrices for the representation of the collocation matrix. The admissible low rank blocks are computed by adaptive cross approximation (ACA). The performance of ACA against the accuracy of the adopted computational scheme for the evaluation of the anisotropic kernels is investigated, focusing on the balance between the kernel representation accuracy and the accuracy required for ACA. The system solution is computed by a preconditioned GMRES and the preconditioner is built exploiting the hierarchical …
Fast track -hoitomallin taloudellinen arviointi Keski-Suomen sairaanhoitopiirissä
2010
Keski-Suomen sairaanhoitopiirissä gastrokirurgian kehitystyössä on viime vuosina keskitytty yhtenä osa-alueena perioperatiivisen hoidon ja potilasturvallisuuden parantamiseen sekä erityisesti fast track – hoitomalliin. Fast track -hoitomallin tavoite on optimoida potilaiden postoperatiivista toipumista käyttämällä mini-invasiivisia leikkausmenetelmiä,uusia anestesiamenetelmiä ja tehostamalla perioperatiivista hoitotyötä sekä vähentää komplikaatioiden syntymistä, sairaalassa oloa sekä kustannuksia suuren leikkauksen jälkeen. Tutkimuksen tarkoituksena on selvittää minkälaisia taloudellisia vaikutuksia fast track -hoitomallin käyttöönotolla on ollut sekä onko hoitomallin avulla saavutettu kust…
Robust Selective Stereo SLAM without Loop Closure and Bundle Adjustment
2013
This paper presents a novel stereo SLAM framework, where a robust loop chain matching scheme for tracking keypoints is combined with an effective frame selection strategy. The proposed approach, referred to as selective SLAM (SSLAM), relies on the observation that the error in the pose estimation propagates from the uncertainty of the three-dimensional points. This is higher for distant points, corresponding to matches with low temporal flow disparity in the images. Comparative results based on the reference KITTI evaluation framework show that SSLAM is effective and can be implemented efficiently, as it does not require any loop closure or bundle adjustment.
Gender-Typed Sport Practice, Physical Self-Perceptions, and Performance-Related Emotions in Adolescent Girls
2020
Youth sport experience provides opportunities for physical, personal, and social development in youngsters. Sport is a social system in which socially constructed gender differences and stereotypes are incorporated, and specific sport activities are often perceived as gender characterized. The objective of this study was to examine the relationship between some salient physical and emotional self-perceptions and the type of sport practiced. A sample of 261 female athletes, aged 14–21 years (Mage = 15.59, SD = 2.00), practicing different sports, categorized as feminine (e.g., artistic and rhythmic gymnastics), masculine (e.g., soccer and rugby), or neutral (e.g., track and field and tennis),…
TRANS-FUSIMO: preliminary in-vivo animal results of MR-guided focused ultrasound of liver under respiratory motion
2019
Purpose: Treating liver tumors using Focused Ultrasound (FUS) is a great challenge. Prior to human applications, an in-vivo animal trial using the TRANS-FUSIMO treatment system (TTS) is ongoing in order to evaluate the safety and the technical efficacy and efficiency of generating predefined necrotic lesions. Methods and Materials: The trial includes a crossbred porcine model of thirty large white swine (all females; 55-85Kg) that will be treated using the TTS under general anaesthesia with intubation. All treatments haven been performed under ventilator-controlled breathing and using an improved non-clinical prototype FUS transducer integrated with a 1,5T MRI unit; a set of interventional …
Analysis of thin film cracking and buckling on compliant substrate by fragmentation test
2007
Application of coating fragmentation test for determination of coating properties is considered. A probabilistic model of coating fragmentation under uniaxial tensile loading is applied for coating and interface property identification of thin brittle coating/polymer substrate system. A finite element model is developed to simulate the process of buckle formation in coating strips during fragmentation test. The measured buckle geometry parameters and buckle density evolution as a function of the applied strain is used to estimate the interface toughness.
Il Fast Track nelle fratture di femore può davvero favorire risultati clinici migliori?
2016
Le attuali linee guida raccomandano di effettuare il trattamento chirurgico di stabilizzazione o sosti- tuzione protesica entro 24-48 ore dall’accesso ospedaliero, al ne di migliorare il risultato funziona- le, ridurre il rischio di mortalità, la degenza ospedaliera e le complicazioni post-operatorie. Tuttavia, la mancanza di studi randomizzati rappresenta un importantissimo limite scienti co dal momento che ad oggi la migliore evidenza scienti ca sul timing chirurgico nelle fratture di collo femore si basa esclusivamente su studi prospettici e retrospettivi. In questo articolo, viene descritto il percorso ospedaliero per il trattamento delle fratture del collo del femore nel paziente anzia…
Free vibrations analysis of cracked variable stiffness composite plates by the eXtended Ritz method
2022
Variable stiffness composite laminates show advantageous structural features related to their enlarged design space. They are attractive candidates for advanced engineering applications where the assessment of static and dynamic behavior and strength in the presence of cracks is often required. In the present work, a single-domain extended Ritz formulation is proposed to study the free vibrations of cracked variable stiffness composite plates. The plate model is based on the first-order shear deformation theory whose primary variable, i.e. displacements and rotations, are approximated via a set of orthogonal polynomial trial functions enriched with a set of special crack functions. These fu…