Peter Trier Mikkelsen

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This paper presents the Subsurface Light Propagation Volume (SSLPV) method for real-time approximation of subsurface scattering effects in dynamic scenes with changing mesh topology and lighting. SSLPV extends the Light Propagation Volume (LPV) technique for indirect illumination in video games. We introduce a new consistent method for injecting flux from(More)
We develop a state space framework for estimating term structure models, where latent Markovian state variables are mapped non-linearly into observable market data. The measurement equation of our framework is explicitly constructed such that it takes raw market prices and rates as direct inputs. We thus avoid entirely, the need for data preprocessing, such(More)
OBJECTIVES/HYPOTHESIS Cognitive load theory states that working memory is limited. This has implications for learning and suggests that reducing cognitive load (CL) could promote learning and skills acquisition. This study aims to explore the effect of repeated practice and simulator-integrated tutoring on CL in virtual reality (VR) mastoidectomy(More)
Background: Cognitive overload can inhibit learning, and cognitive load theory-based instructional design principles can be used to optimize learning situations. This study aims to investigate the effect of implementing cognitive load theory-based design principles in virtual reality simulation training of mastoidectomy. Methods: Eighteen novice medical(More)
OBJECTIVE The cognitive load (CL) theoretical framework suggests that working memory is limited, which has implications for learning and skills acquisition. Complex learning situations such as surgical skills training can potentially induce a cognitive overload, inhibiting learning. This study aims to compare CL in traditional cadaveric dissection training(More)
INTRODUCTION Fractures of the tibial shaft are relatively common injuries. There are indications that tibial shaft fractures share characteristics in terms of site, type and local fracture mechanisms. In this study, we aimed to set up a mathematical, computer-based model using finite element analysis of the bones of the lower leg to examine if such a model(More)
A 34-year-old male came to the casualty ward because of a recent ankle sprain. Plain radiographs revealed a deformity in the distal tibiofibular joint (DTFJ). Despite conservative treatment, he had recurring ankle pain. Therefore, he was reevaluated with a computed tomography scan, which demonstrated an osteochondroma in the DTFJ with significant(More)
Cognitive load (CL) theory suggests that working memory can be overloaded in complex learning tasks such as surgical technical skills training, which can impair learning. Valid and feasible methods for estimating the CL in specific learning contexts are necessary before the efficacy of CL-lowering instructional interventions can be established. This study(More)
OBJECTIVES/HYPOTHESIS To explore why novices' performance plateau in directed, self-regulated virtual reality (VR) simulation training and how performance can be improved. STUDY DESIGN Prospective study. METHODS Data on the performances of 40 novices who had completed repeated, directed, self-regulated VR simulation training of mastoidectomy were(More)
D-dimer is often used to exclude deep venous thrombosis, primarily in the lower extremities. We describe a 38-year-old man who had deep venous thrombosis in the left vena subclavia in spite of a normal D-dimer. Only one inconclusive survey compares the value of D-dimer and upper extremity deep venous thrombosis. We conclude that where deep venous thrombosis(More)