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Porsgrunn, Norway

Telemark University College is the fourth largest university college in Norway. The University College has about 6500 students. It is split between four different locations. The campuses are located in Bø, Notodden, Porsgrunn, Rauland and Drammen. Wikipedia.

Di Ruscio D.,Telemark University College
Modeling, Identification and Control

Some analytical results concerning PI controller tuning based on integrator plus time delay models are worked out and presented. A method for obtaining PI controller parameters, Kp = α/kτ , and, Ti = β ,which ensures a given prescribed maximum time delay error, dτmax, to time delay, τ , ratio parameter δ = dτmax/τ , is presented. The corner stone in this method, is a method product parameter, c̄ = αβ.Analytical relations between the PI controller parameters, Ti, and, Kp, and the time delay error parameter, δ, is presented, and we propose the setting, β= c̄/a (δ + 1), and, α = a/δ+1, which gives, Ti = c̄/a (δ + 1)τ ,and, Kp = a(δ+1)kτ , where the parameter, a, is constant in the method product parameter, c̄ = αβ. It also turns out that the integral time, Ti, is linear in, δ, and the proportional gain, Kp, inversely proportional to, δ + 1. For the original Ziegler Nichols (ZN) method this parameter is approximately, c̄ = 2:38, and the presented method may e.g., be used to obtain new modified ZN parameters with increased robustness margins, also documented in the paper.© 2010 Norwegian Society of Automatic Control. Source

Haugen F.,Telemark University College
Modeling, Identification and Control

This paper demonstrates a number of PI controller tuning methods being used to tune a temperature controller for a real air heater. Indices expressing setpoint tracking and disturbance compensation andstability margin (robustness) are calculated. From these indices and a personal impression about how quick a method is to deliver the tuning result and how simple it is to use, a winning method is identified. © 2010 Norwegian Society of Automatic Control. Source

Bratland-Sanda S.,Telemark University College | Sundgot-Borgen J.,Norwegian School of Sport Sciences
European Journal of Sport Science

The prevalence of disordered eating and eating disorders vary from 0-19% in male athletes and 6-45% in female athletes. The objective of this paper is to present an overview of eating disorders in adolescent and adult athletes including: (1) prevalence data; (2) suggested sport- and gender-specific risk factors and (3) importance of early detection, management and prevention of eating disorders. Additionally, this paper presents suggestions for future research which includes: (1) the need for knowledge regarding possible gender-specific risk factors and sport- and gender-specific prevention programmes for eating disorders in sports; (2) suggestions for long-term follow-up for female and male athletes with eating disorders and (3) exploration of a possible male athlete triad. © 2013 Copyright European College of Sport Science. Source

Frers L.,Telemark University College
Cultural Geographies

In recent writings the concept of absence has been used to question the reach of phenomenological accounts of the human-world relation from a deconstructionist perspective. This article argues that absence is rooted in the corporeal embedded ness of human beings in the world that surrounds them. This is the case although absences refer to entities that are not present. Discussing the absence-presence relation, it is made clear that the simultaneity of absence and presence is not paradoxical, because the absence of presence and the presence of absence refer to different entities. Contrary to the connotation of absence with Derrida, the spectral and haunting, absences are experienced in a wide variety of practices that are both extraordinary and mundane. A detailed investigation into the processes in which absences are experienced then shows how an experience of absence comes into being and what affects the power of the experience. The article argues that the experience of absence is stronger when it refers to practices, emotions and corporal attachments that have been deeply ingrained into those who experience the absence. Since materiality, embodiment and (the lack of) resistance play a crucial role in the actual experience of absences, the conceptualization of absence should reflect these qualities. It is precisely because absence is rooted in processual corporality that absence can unfold such disturbing power. Those who experience something as absent have to fill the void that they experience with their own emotions, they have to bridge the emptiness that threatens their established expectations and practices. Accordingly, absence is presented as a phenomenological grounded concept that gains its epistemological and experiential quality through its connection to the corporal body, its senses and emotions, and the world around it. © The Author(s) 2013. Source

Haugen F.,Telemark University College
Modeling, Identification and Control

A novel experimental method - here denoted the Good Gain method { for tuning PI controllers is proposed. The method can be regarded as an alternative to the famous Ziegler-Nichols' Ultimate Gain method. The approach taken resembles the Ziegler-Nichols' method as it is based on experiments with the closed loop system with proportional control. However, the method does not require severe process upset during the tuning like sustained oscillations. Only well-damped responses are assumed. Furthermore, in the present study it is demonstrated that the approach typically gives better stability robustness comparing with the Ziegler-Nichols' method. The method is relatively simple to use which is beneficial for the user. A theoretical rationale based on second order dynamics is given. © 2013 Norwegian Society of Automatic Control. Source

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