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Search Results: 1 - 10 of 950 matches for " Tor Ivar Eikaas "
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Multi-purpose process simulators
Ommund ?g?rd,Tor Ivar Eikaas
Modeling, Identification and Control , 1997, DOI: 10.4173/mic.1997.2.1
Abstract: The first part of this paper describes a multi-purpose dynamic simulator for the Heidrun oil production plant. The simulator integrates a commercial dynamic simulation model with the actual process control system to enable dynamic simulation, control system verification and operator training within the same framework and based on the same models and configuration data. The control system configuration can be imported directly into the simulator. This simplifies simulator maintenance and ensure consistency between the simulator and the real plant. The entire system runs on standard Unix work stations. The simulator has so far been used for initial operator training, control system verification and controller tuning.
A Global Remote Laboratory Experimentation Network and the Experiment Service Provider Business Model and Plans
Tor Ivar Eikaas,Christian Schmid,Bjarne A. Foss,Denis Gillet
Modeling, Identification and Control , 2003, DOI: 10.4173/mic.2003.3.2
Abstract: This paper presents results from the IST KAII Trial project ReLAX - Remote LAboratory eXperimentation trial (IST 1999-20827), and contributes with a framework for a global remote laboratory experimentation network supported by a new business model. The paper presents this new Experiment Service Provider business model that aims at bringing physical experimentation back into the learning arena, where remotely operable laboratory experiments used in advanced education and training schemes are made available to a global education and training market in industry and academia. The business model is based on an approach where individual experiment owners offer remote access to their high-quality laboratory facilities to users around the world. The usage can be for research, education, on-the-job training etc. The access to these facilities is offered via an independent operating company - the Experiment Service Provider. The Experiment Service Provider offers eCommerce services like booking, access control, invoicing, dispute resolution, quality control, customer evaluation services and a unified Lab Portal.
Game-based dynamic simulations supporting technical education and training
Tor Ivar Eikaas,Bjarne A. Foss,Ole K. Solbj????rg,Tore Bj????lseth
International Journal of Online Engineering (iJOE) , 2006,
Abstract: Educational games may improve learning by taking advantage of the new knowledge and skills of today ¢ € s students obtained from extensive use of interactive games. This paper describes how interactive dynamic simulators of advanced technical systems and phenomena can be shaped and adapted as games and competitions supporting technical education and training. Some selected examples at different educational levels are shown, from vocational training to university level courses. The potential benefit and perceived learning effect of this approach is also described and underpinned from comprehensive user feedback.
Long term effects of parental disability:A register based life course follow-up of Norwegians born in 1967-1976
Petter Kristensen,Tor Bjerkedal,John Ivar Brevik
Norsk Epidemiologi , 2009,
Abstract: -
A simulation game for nonlinear control theory education
Rune Haugom,Ole K. Solbj?rg,Kristin Y. Pettersen,Tor I. Eikaas
Modeling, Identification and Control , 2007, DOI: 10.4173/mic.2007.2.3
Abstract: In this paper a computer game implemented as an applet for use in a graduate course in nonlinear control theory is described, and the learning value of the game is substantiated using different learning theories and theories related to ICT. The case study of the applet is a mass-damper-spring system with a nonlinear spring characteristic, and a game with a highscore list has been made out of the system to stimulate student competition and motivation.
Game play in vocational training and engineering education
Bjarne A. Foss,Ole K. Solbj?rg,Tor I. Eikaas,Frank Jakobsen
Modeling, Identification and Control , 2007, DOI: 10.4173/mic.2007.2.1
Abstract: Educational games may create a new and improved learning culture by drawing advantage of the new knowledge and skills of today’s students obtained from extensive use of interactive game software. This paper presents a design basis and online learning resources taking advantage of game-related features like a high degree of interactivity, attractive graphics, a dynamical virtual universe, and an incentive system to promote prolonged and more advanced use. The educational resources, denoted PIDstop, are targeted towards the engineering domain. Feedback from over 2000 users clearly indicates that PIDstop has a positive learning effect. Training packages for vocational training of Automation Technicians is emphasized in this paper. Such learning resources must have a limited mathematical complexity; hence, the representation should be rather descriptive. Evaluation of learning resources to assess the actual learning effect is important, and a two-step procedure based on formative and summative evaluation is proposed for this purpose.
Pancreatobiliary versus intestinal histologic type of differentiation is an independent prognostic factor in resected periampullary adenocarcinoma
Arne Westgaard, Svetlana Tafjord, Inger N Farstad, Milada Cvancarova, Tor J Eide, Oystein Mathisen, Ole Clausen, Ivar P Gladhaug
BMC Cancer , 2008, DOI: 10.1186/1471-2407-8-170
Abstract: Histopathologic variables in 114 consecutively resected periampullary adenocarcinomas of pancreatobiliary (n = 67) and intestinal (n = 47) type differentiation were evaluated using a standardized, systematic protocol for evaluation of the resected specimen (study group). Histologic type of differentiation and tumour origin were compared as predictors of survival, and the results were validated by comparison with a historical control group consisting of 99 consecutive pancreaticoduodenectomies performed before standardization of histopathologic evaluation. Associations between histopathologic variables were evaluated by Chi-square and Mann-Whitney tests. Survival was estimated by the Kaplan-Meier method, comparing curves using log-rank test, and by univariate and multivariable Cox regression analysis.Both in the study group (n = 114) and in the historical control group (n = 99), the histologic type of differentiation independently predicted survival, while tumour origin predicted survival only in univariate analysis. Independent adverse predictors of survival in the study group were pancreatobiliary type differentiation (p < 0.001; HR 3.1; CI 1.8–5.1), regional lymph node involvement (p < 0.001; HR 2.5; CI 1.5–4.4), vessel involvement (p = 0.012; HR 1.9; CI 1.2–3.1), and increasing tumour diameter (measured in cm, p = 0.011; HR 1.3; CI 1.1–1.5). For pancreatobiliary differentiated adenocarcinomas (n = 67), lymph node status, vessel involvement, and tumour diameter remained independent prognostic factors, while tumour origin did not independently predict the prognosis due to significant association with tumour size (p < 0.001) and lymph node involvement (p = 0.004).Pancreatobiliary versus intestinal type of differentiation independently predicts poor prognosis after pancreaticoduodenectomy for periampullary adenocarcinoma. Lymph node involvement, vessel infiltration, and increasing tumour diameter are adverse predictors of survival in tumours with pancreatobiliary dif
The Human Genomic Melting Map
Fang Liu,Eivind T?stesen,Jostein K Sundet,Tor-Kristian Jenssen,Christoph Bock,Geir Ivar Jerstad,William G Thilly,Eivind Hovig
PLOS Computational Biology , 2007, DOI: 10.1371/journal.pcbi.0030093
Abstract: In a living cell, the antiparallel double-stranded helix of DNA is a dynamically changing structure. The structure relates to interactions between and within the DNA strands, and the array of other macromolecules that constitutes functional chromatin. It is only through its changing conformations that DNA can organize and structure a large number of cellular functions. In particular, DNA must locally uncoil, or melt, and become single-stranded for DNA replication, repair, recombination, and transcription to occur. It has previously been shown that this melting occurs cooperatively, whereby several base pairs act in concert to generate melting bubbles, and in this way constitute a domain that behaves as a unit with respect to local DNA single-strandedness. We have applied a melting map calculation to the complete human genome, which provides information about the propensities of forming local bubbles determined from the whole sequence, and present a first report on its basic features, the extent of cooperativity, and correlations to various physical and biological features of the human genome. Globally, the melting map covaries very strongly with GC content. Most importantly, however, cooperativity of DNA denaturation causes this correlation to be weaker at resolutions fewer than 500 bps. This is also the resolution level at which most structural and biological processes occur, signifying the importance of the informational content inherent in the genomic melting map. The human DNA melting map may be further explored at http://meltmap.uio.no.
Resectable adenocarcinomas in the pancreatic head: the retroperitoneal resection margin is an independent prognostic factor
Arne Westgaard, Svetlana Tafjord, Inger N Farstad, Milada Cvancarova, Tor J Eide, Oystein Mathisen, Ole Petter F Clausen, Ivar P Gladhaug
BMC Cancer , 2008, DOI: 10.1186/1471-2407-8-5
Abstract: 114 consecutive macroscopically margin-free periampullary adenocarcinomas were examined according to a prospective standardized protocol for histopathologic evaluation. The retroperitoneal margin was assessed by serial perpendicular sectioning. The periampullary cancer origin (pancreas, ampulla, distal bile duct or duodenum) was registered prospectively and reevaluated retrospectively. Associations between histopathologic factors were evaluated by Chi-square test, Fisher's exact test, Kruskal-Wallis test, and Mann-Whitney test, as appropriate. Survival curves were calculated by the Kaplan-Meier method and compared using the log-rank test. Associations between histopathologic factors and survival were also evaluated by unadjusted and adjusted Cox regression analysis, including stepwise variable selection, in order to identify factors that independently predict a poor prognosis after periampullary adenocarcinoma resections.Microscopic resection margin involvement (R1 resection) was present in 40 tumours, of which 32 involved the retroperitoneal margin. Involvement of the retroperitoneal margin independently predicted a poor prognosis (p = 0.010; HR 1.89; CI 1.16–3.08) after presumed curative (R0 and R1) resection. In microscopically curative (R0) resections (n = 74), pancreatic tumour origin was the only factor that independently predicted a poor prognosis (p < 0.001; HR 4.71 for pancreatic versus ampullary; CI 2.13–10.4).Serial perpendicular sectioning of the retroperitoneal resection margin demonstrates that tumour involvement of this margin independently predicts survival after pancreaticoduodenectomy for adenocarcinoma. Periampullary tumour origin is the only histopathologic factor that independently predicts survival in microscopically curative (R0) resections.Resectable primary adenocarcinomas located in the pancreatic head may derive from the pancreatic tissue, the hepatopancreatic ampulla, the distal bile duct or the duodenum, and collectively these cancers ma
Beyond Turn-taking
Ivar Solheim
Outlines : Critical Practice Studies , 2002,
Abstract: The article discusses several epistemological and methodological issues related to the analysis of discourse in general and of educational talk in particular. The theoretical framework provided by conversation analysis (CA) is applied and critically discussed in the analysis of an empirical example of educational talk. Several questions seem pertinent: Can we - as analysts - have direct access to talk "as it actually occurs", independent of any kind of theorizing and predefined categorization? What is the epistemological status of the conversation analytic categories? What are the limitations of applying turn-taking as an analytical category in the study of talk? To what extent can we presume the knowledgeability of the interlocutors as a premise in our analysis? On the background of my own attempts at applying CA in the analysis of educational discourse, I argue for a widening of the perspective from a narrow, empiricist focus on conversational turn-takings and sequential organization of talk, for example in the handling of issues like silences and absences in talk. On the other hand, I also warn against the pitfalls of historicist, abstract social theory; here exemplified with some texts from theorists applying abstract philosophical categories from dialectical and historical materialism like "the law of contradiction" as explanatory tools in the study of situated action. In the study of educational meaning making we should avoid empiricist as well as historicist approaches and explanations.
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