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Recent revisions in the sunspot records illustrate the challenges related to obtaining a 400-year-long observational record of past solar-activity changes. Cosmogenic radionuclides offer the possibility of obtaining an alternative and completely independent record of solar variability. Here, we illustrate that these records offer great potential for quantitative solar-activity reconstructions far
The development of a mathematical model and a computer program to facilitate the study of the multi-cylinder paper drying process is presented. Experimentally determined values far different heat and mass transfer coefficients are used to ensure the physical validity of the model. A unique feature of the model is its inclusion of a mass transfer coefficient for the dryer fabric. Thus far, the mass
The possibility to print out metallic components with complex 3D-structures is could revolutionize the industry. In this master’s thesis the cause of process parameters have been investigated for three alloys; stainless steel, 316L, two nickel-based alloys, a derivative of Alloy 738 and 939. Microstructure, porosity, tensile testing, impact toughness, hardness and surface roughness was investigate
Background: Fetal cardiovascular magnetic resonance (CMR) imaging may provide a valuable adjunct to fetal echocardiography in the evaluation of congenital cardiovascular pathologies. However, dynamic fetal CMR is difficult due to the lack of direct in-utero cardiac gating. The aim of this study was to investigate the effectiveness of a newly developed Doppler ultrasound (DUS) device in humans for
Kursguide - Course Syllabus • • • Details of approval The syllabus was approved by the board of the Department of Service Management and Service Studies on 2015-01-27 and was last revised on 2017-01-25. The revised syllabus applies from 2017-02-01, spring semester 2017. General Information The course may not be included in a main field of study. The course is included in the second semester of the
https://www.ses.lu.se/en/sites/ses.lu.se.en/files/kp_smmr23_rev170125.pdf - 2026-07-01
Kursguide - Course Syllabus • • • Details of approval The syllabus was approved by the board of the Department of Service Management and Service Studies on 2015-01-27 and was last revised on 2017-01-25. The revised syllabus applies from 2017-02-01, spring semester 2017. General Information The course may not be included in a main field of study. The course is included in the second semester of the
https://www.ses.lu.se/en/sites/ses.lu.se.en/files/kp_smmr25_english1.pdf - 2026-07-01
The sequence of peaks and troughs in a load process acting on a material, contains important information about the damage caused by the load, e.g. on the growth rate of a widening crack. The stress range, i.e. the difference between a peak and the following trough, is one of the variables that is used to describe e.g. fatigue life under random loading. The moments, in particular the mean and varia
Our future built environment will not only consume energy, it will also produce (partly) its own energy need. Solar energy has been proven to be a valid strategy for producing on-site renewable energy. Planning for integrating solar energy in buildings involves many players and decision-making. In this article, a process map defining which decisions regarding solar energy needs to be discussed in
This master thesis is on Statistical Process Control (SPC). The objective is to evaluate if SPC can be used in a process that produces plates for heat exchanger, the process evaluated is located at Alfa Laval Lund AB. The products are produced in the process by punching and shearing metal coils. An ambition in the project is also to increase the knowledge about Statistical Process Control at Alfa
The Hawkes process, also referred to as a self-exciting point process, is a class of point processes where the intensity is conditioned on previous events. More specifically, an event occurrence excites the process, temporarily increasing the probability of more events occurring. One application of Hawkes processes is to model occurrences of crimes, such as burglaries or shootings. The present the
Reliable prediction tools are yet to be developed for estimating the accurate acoustic performance of lightweight structures, which are vital especially in the design process. This paper presents a sound insulation prediction model based on artificial Neural Networks (NN) to estimate acoustic performance for airborne and impact sound insulation of floor structures. At an initial stage, the predict
Background and study aims: This study aimed to externally validate a recently developed English model for the prediction of 30-day mortality after endoscopic retrograde cholangiopancreatography (ERCP). Real-world mortality data beyond 30 days post-ERCP are scarce; thus, the study also aimed to develop a prediction model for mortality up to 12 months post-ERCP. Patients and methods: All patients w
A plane wave impinges on a laterally double-periodic inhomogeneous lossy dielectric structure. Using a wave splitting approach, and an expansion of the fields and permittivity in global and local basis functions, respectively, the scattered fields are determined via a propagator. The formulation is useful for a permittivity which varies abruptly as well as in a continuous fashion. A subdomain basis
Value-at-Risk (VaR) har kommit att bli ett viktigt riskmått de senaste 20 åren och används av finansiella institut världen över. Det huvudsakliga problemet med detta mått är att välja den mest lämpliga sannolikhetsfördelningen för att prognostisera risken. Detta betyder att man måste göra antaganden om den underliggande tillgångens probabilistiska beteende och utifrån dessa antaganden evaluera VaRValue-at-Risk (VaR) has grown to become an important risk measurement used by financial institutions in the last 20 years. The primary problem with this measure is to choose the most appropriate probability density function to forecast the risk. This means assumptions have to be made about the underlying asset’s probabilistic behavior and from these assumptions evaluate the Value-at-Risk measure.
Microsoft Word - Program_ClimBEco summer meeting 2022 Of Over The Sands Time: Sustainable coastal environments in light of climate change ClimBEco summer meeting 2022 September 21-23 @ Marint centrum, Simrishamn www.climbeco.lu.se The purpose of this thematic meeting is to gain a deeper understanding of dynamic coastal environments and the interactions that define them. We will focus specifically
https://www.mgeo.lu.se/en/sites/mgeo.lu.se.en/files/2026-06/Program%20ClimBEco%20summer%20meeting%202022.pdf - 2026-07-01
