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This article describes how a wheel–rail wear detection parameter based on noise was developed by running a rapid transit train instrumented with microphones in a depot with a small curve radius. This full-scale test made use of previous knowledge gained from lab-scale tests. The lab- and full-scale tests showed that noise could be used as an indicator of wear transition, when normal wear turns int
The primary settling tank (PST) is often one of the first treatment steps at a wastewater treatment plant (WWTP) and is the first process in the plant to remove significant amounts of suspended solids. Its role in wastewater treatment however, has oftentimes been neglected and little effort has been made to optimize and model the process. The PSTs have historically been designed based on hydraulic
The aim of this study is to characterize emulsion systems by self-diffusion PGSE NMR methods. The specifics of the emulsions studied are all taken from the literature and they are of the W/O or O/W type stabilized with different emulsifiers. We have investigated what characteristics of emulsions that the NMR self-diffusion technique can shed light on. The diffusion behavior of the liquid inside th
Nociceptive withdrawal reflexes (NWRs) were studied in adult rats in which the movement patterns produced by single muscles had been altered by neonatal tendon transfer. NWRs evoked by cutaneous noxious mechanical and thermal (CO2-laser) stimulation were recorded using electromyography in a decerebrate spinal preparation. The sensitivity distribution within the receptive fields of the NWRs of the
Detta arbete handlar om en behandlingsteknik för hudterapi där lågenergetiska elektroner utnyttjas för strålbehandling där patienten står eller sitter på en roterande plattform. För att behandlingen skall få ett lyckat resultat krävs en viss stråldos (den absorberade energin per massenhet) till patientens hud. För att kontrollera att dosen är rätt används normalt mätningar med olika detektorer. DeBackground and purpose: This study refers to a rotational radiotherapy technique for the treatment of mycosis fungoides. Patients are irradiated by a high dose-rate low-energy electron beam while they stand on a rotating platform. This report presents a first effort to use the Geant4 simulation program to calculate the relation between the stationary and rotational depth dose distributions in an e
Syllabus STAA45 Statistics: Business Statistics I This is a translation of the syllabus which was established in Swedish. U 2024/108 School of Economics and Management STAA45, Statistics: Business Statistics I, 7.5 credits Statistik: Statistik för international business I, 7,5 högskolepoäng First Cycle / Grundnivå Details of approval The syllabus was approved by The Board of the Department of Stat
https://www.lusem.lu.se/sites/lusem.lu.se/files/2024-03/STAA45%20en.pdf - 2026-09-07
We present a statistical mechanics theory of rubber-like elasticity in swollen and unswollen polymer networks characterized by explicitly non-Gaussian distribution functions (Laplace's, Cauchy's, and continuous Poisson's in the exponential limit). An important outcome is the derivation of new families of statistical and mechanical laws, including a discussion of energy functions of strain invarian
This thesis compares three different tests by analyzing the difference in sample means between two different data samples, both with small sample sizes. The three tests being examined here are the t-test, nonparametric bootstrap, and permutation test. These tests are employed under several different circumstances, such as varying sample sizes, means, underlying distributions, and variances in the
Popular Abstract in Swedish Östrogen är ett av de viktigaste/ mest studerade kvinnliga könshormonerna som styr utvecklingen av våra fortplantningsorgan och deras reproduktionsförmåga. Östrogen påverkar dessutom många av kroppens andra organ, bland annat hjärnan, skelettet, och hjärt-kärlsystemet. Mängden östrogen som finns i kroppen varierar vanligtvis under menstruationscykeln och med kvinnans ålEstrogen effects are mediated either through genomic action involving the classical estrogen receptors, estrogen receptor alpha (ERα) and beta (ERß), which function as transcription factors in the nucleus, or through rapid non-genomic action via receptors associated with plasma membrane. Recently, a member of the G protein-coupled receptor family was ascribed estrogen receptor properties and propo
A cohesive interface model based on a master curve is proposed for the analysis of delamination in paperboard under various loading, unloading, and reloading conditions. The model is thermodynamically consistent and considers the effects of elasticity, plasticity, and damage. The proposed model is verified by comparing its predictions with experimental data obtained from multiple loading–unloading
Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system (CNS) in which oligodendrocytes, the CNS cells that stain most robustly for iron and myelin are the targets of injury. Metals are essential for normal CNS functioning, and metal imbalances have been linked to demyelination and neurodegeneration. Using a multidisciplinary approach involving synchro
PURPOSE: To study the feasibility of an interleaved gradient-echo, echo-planar imaging (iGE-EPI) sequence for multiplanar magnetic resonance temperature imaging (MRTI) to monitor intracerebral thermal treatment three-dimensionally using multielement ultrasound applicators.MATERIALS AND METHODS: Transmissible venereal tumor (TVT) fragments were injected into the right cerebral hemisphere of five do
Syftet med uppsatsen är att finna en modell som väl beskriver fördelningen för orderdata från Google Adwords och att finna ett lämpligt sätt att skatta det förväntade värdet för en order. Vi gör detta på uppdrag av marknadsföringsbyrån Precis Digital. Från dem erhåller vi data för en av deras kunder. Till att börja med anpassar vi ett antal olika sannolikhetsfördelningar med Maximum-Likelihood-metThe purpose of this paper is to find a model that describes the distribution of Google Adwords order data and to find an appropriate method to estimate the expected value for an order. We do this on behalf of the marketing agency Precis Digital. We receive data for one of their customers. To begin with we fit some widely used probability distributions using the Maximum-Likelihood method and invest
The “Fundamental Review of the Trading Book” calculates the capital requirements using Expected Shortfall (ES) backtests since Value at risk (VaR) neglects losses in the tail. Additionally, real estate investments have increased significantly, which warrants an exploration of the asset class. This study applies eight different univariate GARCH models to six distinct property indices; Global, Asia
Popular Abstract in Swedish Nervsignaler som förmedlar känsel från huden och kommandon till kroppsmuskulaturen passerar genom ryggmärgen eller dess motsvarighet i hjärnstammen. Kunskap om hur ryggmärgens nervkretsar är uppbyggda och hur de bearbetar nervsignaler är därför av fundamental betydelse för att kunna förstå och behandla exempelvis smärta och ryggmärgskador. I detta avhandlingsarbete studPrinciples for sensorimotor transformation and plasticity in the spinal cord and functional repair in the root-avulsed spinal cord were studied. A comparative study confirmed that the nociceptive withdrawal reflex (NWR) system is composed of reflex modules, with each performing a finely tuned transformation of skin sensory input to activity in one muscle. This suggests that modularity of the NWR s
A significant part of non-exhaust particle emissions in cities comes from the wear of vehicle components. Several studies on airborne particles from the wear of disc brakes and tires have been completed. However, few publications can be found in the scientific literature regarding airborne emissions from dry clutches used in road vehicles. With this in mind, this preliminary study designs a clutch
Statistik 10p ekologi BIO 580 Helsingborg HT 2004 Course Summary for NGEA03 Remote Sensing for Landscape Studies, 15 credits spring 2020 Course coordinator: Ulrik Mårtensson Teachers in the course: Anna Maria Jönsson, Jonas Ardö, Ulrik Mårtensson Number of students: 15 registered students Grade distribution: 0 UK, 3 G, 12 VG, one student quit at mid-course due to parental leave and will complete 2
https://www.nateko.lu.se/sites/nateko.lu.se/files/2023-02/NGEA03%20course%20evaluation%20summary%20VT2020.pdf - 2026-09-07
In recent years several aids for automated interpretation of visual field data have been suggested. We believed that incorporation of thorough knowledge of normal visual field variability would allow improvements in the performance of such aids since more attention would be paid to field results in areas with low physiological variability. Two visual field models for classification of fields in gl
