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Friction Models and Friction Compensation Karl J. Åström Department of Automatic Control Lund University 1. Introduction 2. Friction Models 3. The LuGre Model 4. Effects of Friction on Control Systems 5. Friction Compensation 6. Summary Introduction ◮ Essential in Motion Control ◮ Classics Leonardo da Vinci (1452-1519 Amontons 1699 Coulomb 1785 ◮ Tribology ◮ Control ◮ Physics AFM ◮ Surface force a
Nyhetsbrev från Akademikerföreningen Sveriges Ingenjörer vid Siemens Energy AB Kontakt: asi.se@siemens-energy.com Redaktörer: LM, MN, CH Nr: 02/26 2026-03-12 Löneskola Inför årets lönerevision avser vi att genomföra en löneskola. Syftet är att stärka kunskapen om löneprocessen, klargöra vilka förutsättningar som gäller samt gå igenom roller, ansvar och viktiga begrepp i lönerevisionen. Löneskolan
Checklista för uppdragsavtal Forskningsservice Sophie Hydén Picasso Finansieringsmetoder för excellens PLANERA EN AKADEMISK KARRIÄR En akademisk karriär är ofta mångfacetterad, och dess olika delar ställer krav på olika typer av egenskaper och färdigheter. Olika karriärprofiler och vägar framåt kan överlappa och kombineras, alternativt så rör man sig mer etappvis längst karriärvägen. Forskning, un
https://www.medarbetarwebben.lu.se/sites/medarbetarwebben.lu.se/files/finansieringsmetoder-for-excellens.pdf - 2026-05-04
Everybody involves stress in everyday life but not everyone handles it well. According to World Health Organization, stress and stress-related disorders are growing and in Sweden these disorders are considered serious public health problems. In this project, I am focusing in finding the way to help people decrease their stress. I developed a product that guides users to deep breathing. This object
While Sweden falls short in integrating youths growing up in segregated areas, these disadvantaged neighborhoods are more frequently imposed to profit-driven strategies that result in gentrification. This thesis aims to uncover how gentrification affects the lived experience that youths from disadvantaged areas have of their habitat. Choosing the case of Järva, Stockholm, the ways youths perceive
In radiological diagnostics and therapy, it is important that practitioners, referrers, (i.e. radiologists, radiation oncologists and others in healthcare) are aware of how much radiation a patient may receive from the various procedures used and associated health risk. The profession has a duty to inform patients or their representatives of the advantages and disadvantages of specific investigati
Problem-based learning (PBL) has proven to be highly effective for educating students in an active and self-motivated manner in various disciplines. Student projects carried out following PBL principles are very dynamic and carry a high level of uncertainty, both conditions under which agile project management approaches are assumed to be highly supportive. The paper describes an empirical case st
Chronic obstructive pulmonary disease (COPD) is a progressive life-threatening disease that is significantly increasing in prevalence and is predicted to become the third leading cause of death worldwide by 2030. At present, there are no true curative treatments that can stop the progression of the disease, and new therapeutic strategies are desperately needed. Advances in cell-based therapies proTo date, bone marrow-derived mesenchymal stromal cells (MSCs) have been considered the golden standard among MSC cell-based therapies. However, the harvesting of bone marrow is a highly invasive procedure and the number of MSCs isolated is low, and it declines with increasing age. MSCs with immune-regulatory and regenerative properties can be isolated from many different tissues; however, bone mar
Chronic obstructive pulmonary disease (COPD) is a progressive life-threatening disease that is significantly increasing in prevalence and is predicted to become the third leading cause of death worldwide by 2030. At present, there are no true curative treatments that can stop the progression of the disease, and new therapeutic strategies are desperately needed. Advances in cell-based therapies proChronic obstructive pulmonary disease (COPD) is a progressive life-threatening disease that is significantly increasing in prevalence and is predicted to become the third leading cause of death worldwide by 2030. At present, there are no true curative treatments that can stop the progression of the disease, and new therapeutic strategies are desperately needed. Advances in cell-based therapies pro
Podd: Minnet och hälsan, del 1 – Vetenskap och Hälsa Vetenskap och hälsa Populärvetenskapligt om medicinsk forskning i Skåne Teman Podd Tidskrift Prenumerera Om webbplatsen Kontakt Sök Sök Podd: Minnet och hälsan, del 1 2022-06-03 Vetenskap & hälsa · Minnet, maten och hälsan: DEL 1 MINNET Publicerad 220603 Vårt minne är oumbärligt för att vi ska fungera i vardagen. Ändå kan vi inte alltid lita p
https://www.vetenskaphalsa.se/podd-minnet-och-halsan/ - 2026-05-02
Fracture behavior of an ultra thin Aluminium foil was studied. For very short crack lengths, fracture has been followed in the scanner electronic microscope (SEM) with a tensile stage. A single edge notched tension specimen was used. Crack length and applied load during the crack growth were measured. These results have been used to calculate fracture strength using linear elastic fracture mechani
Changes in the energy landscape relating both to the ambitions of a green energy transformation as well as increasing global security concerns, have led to increased attention to new energy carriers. These can serve the role of allowing for the electrification of transport and decarbonization of industries as well as to reduce the effects of variation in many sustainable energy sources such as winChanges in the energy landscape relating both to the ambitions of a green energy transformation as well as increasing global security concerns, have led to increased attention to new energy carriers. These can serve the role of allowing for the electrification of transport and decarbonization of industries as well as to reduce the effects of variation in many sustainable energy sources such as win
In response to growing criticism of new public management reforms, the Nordic countries have introduced so-called trust reforms aimed at transforming public sector management and leadership. There is, however, scarce knowledge about the role of organizational concepts in national trust reform and how they are translated, not least in a comparative perspective. This study offers an in-depth analysiIn response to growing criticism of new public management reforms, the Nordic countries have introduced so-called trust reforms aimed at transforming public sector management and leadership. There is, however, scarce knowledge about the role of organizational concepts in national trust reform and how they are translated, not least in a comparative perspective. This study offers an in-depth analysi
Rapport från ”the Big Apple” Rapport från ”the Big Apple” – om engagemang, sociala medier och volontärarbete Malin Stedt Gustavsson & Anna Rohlin Larsson 2 Inledning Genom Sacos fackliga stipendiefond fick vi möjligheten att åka till New York i december 2009. Vi stannade i lite drygt en vecka och siktade in oss på att få träffa så många olika organisationer som arbetar med frivilligarbete, engagem
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https://www.msf.lu.se/research/simind-monte-carlo-program/downloads - 2026-05-03
Premiär 14 oktober 2024 Travelling and seeing things anew were essential to the writing of one of the most beloved and translated Swedish poets of modern times, Tomas Tranströmer. Before receiving the Nobel Prize in Literature in 2011, he had already been translated into around 60 languages and had travelled the world to meet his audience in person. Alongside his writing, he was an engaged and att
https://www.lmc.lu.se/ljudbanken/pendulum-memories - 2026-05-03
It is widely accepted that by lowering the oxygen concentration below that of the typical ambient conditions (21% Oxygen) fuels are less likely to ignite and will burn slower. ORS (Oxygen Reduction Systems) make use of this to protect their contents. The oxygen concentration in these systems is done by introducing a flow rate containing a higher percentage of nitrogen into the protected area. The
