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Utilization of an ethanol driven, combustion-based power generator promises high-efficiency combustion in diesel-like engines and avoids problems connected to shrinking supplies of fossil fuels since fuels like ethanol or dimethyl ether can be produced from renewable resources. Fuel injection into such generator through a piezoelectric micro mass flow controller (MMFC) features low power consumpti
A piezoelectric micro mass flow controller (MMFC) for liquid fuel injection into a mini-HCCI-motor for power generation is introduced. Piezoelectric actuation ensures negligible power consumption for fuel injection allowing self-sustaining operation. A pressurized fuel tank is connected to the MMFC which is designed like a normally-closed, on-/off-operating valve. Integrated piezoresistors are use
This work has focused on studying the in-cylinder pressure fluctuations caused by rapid HCCI combustion and determine what they consist of. Inhomogeneous autoignition sets up pressure waves traversing the combustion chamber. These pressure waves induce high gas velocities which causes increased heat transfer to the walls or in worst case engine damage. In order to study the pressure fluctuations a
In this work we present a setup for laser-induced breakdown spectroscopy (LIBS) employing a polarization filtering approach and use it for gas diagnostics. A one parts-per-million (ppm) detection sensitivity is achieved for hydrogen atoms.
Mid-IR polarization spectroscopy (IRPS) and laser-induced fluorescence were applied for detection of CH4 and ethane in 1 atm cold flows and flames. The dependence of IRPS and IRLIF signal of CH4 on different buffer gases, including He, Ar, N2, and CO2 were studied. Simultaneous measurements of IRPS and IRLIF signals allowed a direct comparison of the two techniques. IRPS was superior in detection
Technical developments for the detection of formaldehyde using laser-induced fluorescence were presented. A technique for simultaneous detection of formaldehyde and OH using one laser system was presented. The combined formaldehyde and OH technique was applied in laboratory flames and a small spark-ignition engine. The iodine measurement was performed in a cell using the second harmonic of the sin
This paper presents technical developments for the detection of formaldehyde (CH2O) using laser-induced fluorescence. The easily accessible third harmonic of the Nd:YAG laser at 355 nm was used for excitation of formaldehyde. In order to investigate potential background fluorescence, e.g., from large molecules such as polyaromatic hydrocarbons, special attention was paid to investigating the possi
Brevmall RHI K02 Litteraturlista Humaniora och teo log i Centrum fö r teo log i och re l ig ionsvetenskap Litteraturlista för RHI K02 Religionshistoria: Kandidatkurs, 30 hp, HT 2015 fastställd av studierektor 2015-05-11 Delkurs 1. Levd religion – traditionella och nyskapande ritualer, 7,5 hp Bell, Catherine (2009 [1997]). Ritual: Perspectives and Dimensions. Oxford University Press. ISBN: 978-0199
https://www.ctr.lu.se/media/utbildning/dokument/kurser/RHIK02/20152/RHI_K02_Litteratur.pdf - 2026-05-14
Mid-infrared polarization spectroscopy was applied to detect HCl at trace level in an atmospheric pressure premixed H2/O2/Ar flame with chloroform seeding. Detection sensitivity and potential interference from water lines was investigated.
Investigations on remote temperature sensing of yttria stabilized zirconia (YSZ) thermal barrier coatings (TBCs) at the surface and at the bond-coat/top-coat interface were carried out. Using Y2O3:Eu thermographic phosphor as an embedded temperature sensing layer, sub-surface temperature probing through 300 μm of atmospheric plasma sprayed YSZ is demonstrated. The Y2O3:Eu thermographic phosphor di
Professor Contact details Email: olof [dot] ejermo [at] ekh [dot] lu [dot] se Phone: +46 46 222 96 50 Mobile: +46 73 694 63 42Organisation Department of Economic History Visiting address: Scheelevägen 15 B, Lund Room number: Alfa 1:2036 Service point: 10 WebpageOlof Ejermos profile in Lund University research portalPersonal website:https://sites.google.com/view/olof-ejermo/Other affiliations Profe
https://www.lusem.lu.se/olof-ejermo - 2026-05-14
Vad vet vi om exoplaneter? Studien av planeter har fascinerat mänskligheten sedan för de gamla grekerna, där deras rörelse över himlen representerade allt från gudar till ändringen av säsonger. Vår förståelse för de andra världar i vårt sol system, från gas jätten Jupiter, till de steniga ytan av Mars, har bara förbättrats med tiden. Detta är mest noterbart i det senaste århundrade, med flertal sSince the first discovery of exoplanets, they have been one of the main interests in contemporary astrophysics, with over 5000 confirmed today. One of the current goals is linking the chemical composition of their atmospheres to their formation by modelling the expected abundances for different formation conditions and comparing them to observations. These models require that the parameters of the
Examensarbetets titel Konsument Anpassning av Hållbarhetsinitiativ Inom Mode: Påverkan På Engagemang och Beteende – En kvalitativ studie som analyserar konsumenters köpintention med klädföretags innovativa och hållbara tillvägagångssätt Seminariedatum 30 maj 2024 Kurs FEKH99, Examensarbete i entreprenörskap och innovation på kandidatnivå, 15 högskolepoäng Författare Adam Bengtsson, Kristina StoTitle Consumer Adoption of Sustainability Initiatives within Fashion: Impacts on Engagement and Behavior – A qualitative study analyzing consumers’ purchase intention with fashion brands’ innovative and sustainable approaches Date of the seminar May 30th, 2024 Course FEKH99, Bachelor Degree Project in Entrepreneurship and Innovation Management, Business administration, Undergraduate level, 15 Un
An estimation model which uses the gross heat release data and the fuel energy to estimate the total amount of emissions and unburned Hydro Carbon (HC) is developed. Gross heat release data is calculated from a self-tuned heat release method which uses in-cylinder pressure data for computing the energy released during combustion. The method takes all heat and mass losses into account. The method e
BACKGROUND: Major depressive disorder (MDD) is one of the most common psychiatric disorders and is a great disease burden. However, its underlying pathophysiology and aetiology remain poorly understood. Available evidence suggests that circulating microRNAs (miRNAs) are associated with MDD, but it is still unknown whether miRNAs can predict subsequent incident MDD.METHODS: In this nested case-cont
