Search for dissertations about: "knots"
Showing result 1 - 5 of 61 swedish dissertations containing the word knots.
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1. Knots and Transport in Topological Matter
Abstract : Topology has manifestations in physics ranging from the field of condensed matter to photonics. This dissertation provides a two-fold study on the impact of topology in Hermitian and non-Hermitian band structures. READ MORE
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2. Segmentation of knots : a problem in 3D X-ray scanning of logs
Abstract : This thesis investigates the possibilities of using 3D X-ray tomography to detect and segment knots in logs. In the sawmill process this should be done previously to the sawing the log into boards. READ MORE
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3. Modeling the effects of knots in Structural Timber
Abstract : The main purpose of the pursued research is to increase knowledge of the effects of knots in structural timber so that characteristics of weaker timber may be determined and applied to improve current grading techniques. In the process, a three-dimensional fiber paradigm was established, which describes variations of local principle material axes in timber containing knots. READ MORE
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4. Modelling and strength grading of structural timber and glulam lamellae on the basis of optical scanning and dynamic excitation
Abstract : Machine strength grading of sawn timber is a sawmill process in which density, modulus of elasticity (MOE) and bending or tensile strength are predicted such that the timber can be assigned to strength classes. The predictions of these properties are performed using one or several so-called indicating properties (IPs), which represent a board property, or combination of board properties, measured non-destructively. READ MORE
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5. Strength grading of structural timber and EWP laminations of Norway spruce : Development potentials
Abstract : Strength grading of structural timber is a process by which value is added to sawn products. It is to the greater part carried out using machine grading based on statistical relationships between so called indicating properties and bending strength. READ MORE