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Transmitted-reference (TR) schemes for time-hopping impulse radio (TH-IR) ultra-wideband (UWB) communications allow the use of simple receiver structures that are able to combine energy from different multipath components without channel estimation. A conventional TR receiver consists of a simple delay-and-multiply operation combined with an integrator. On the downside, it shows a performance loss
This paper presents a study of the turbulence field in an optical diesel engine operated under motored conditions using both large eddy simulation (LES) and Particle Image Velocimetry (PIV). The study was performed in a laboratory optical diesel engine based on a recent production engine from VOLVO Car. PIV is used to study the flow field in the cylinder, particularly inside the piston bowl that i
PURPOSE: To identify and develop a conceptual map of prioritized areas and to determine their relative importance for outcome measurement in clinical Parkinson's disease (PD) trials, from the perspectives of health care professionals and people with PD. METHOD: We used concept mapping, a qualitative/quantitative method consisting of three steps: item generation through focus groups (n = 27; 12 peo
Popular Abstract in Swedish Trådlös kommunikation via radiosystem har närapå blivit en rättighet i dagens samhälle. Vi förväntar oss att internet inte ska vara mer fjärran än där vi senast lade vår ``smarta mobiltelefon''; antagligen inom armlängds avstånd. Strömmning av data ökar ständigt då vi nuförtiden själva vill bestämma när och var vi ska avnjuta, till exempel senaste säsongen i favoritseRadio systems, along with the ever increasing processing power provided by computer technology, have altered many aspects of our society over the last century. Various gadgets and integrated electronics are found everywhere nowadays; many of these were science-fiction only a few decades ago. Most apparent is perhaps your ``smart phone'', possibly kept within arm's reach wherever you go, that prov
Long-term selection (>45 generations) for low or high body weight from the same founder population has generated two extremely divergent lines of chickens, the low (LWS) and high weight (HWS) lines, which at the age of selection (56days) differs by more than nine-fold in body weight. The HWS line chickens are compulsive feeders, whereas, in the LWS line, some individuals are anorexic and others ha
When a strong laser field interacts with free atoms, harmonics up to very high orders are created. This extreme ultraviolet (XUV) radiation has interesting properties, such as spatial and temporal coherence, short pulse duration and high brightness. This thesis concentrates on the temporal aspects of this radiation. A method to characterise the pulse duration and time-dependent frequency (chirp)
Interest in the generation of biogas from agricultural residues is increasing rapidly due to its climate benefits. In this study, an evaluation of the economic feasibility of various technologies, also on different scales, for the production of combined heat and power from manure-based biogas in Sweden is presented. The overall conclusion is that such production is not profitable under current con
A classical structural optimisation problem consists of a problem-specific objective function which has to be minimised in consideration of particular constraints with respect to design and state variables. In this contribution we adopt a conceptually different approach for the design of a structure which is not based on a classical optimisation technique. Instead, we establish a constitutive micr
In this study the possibilities for a new steam boiler and a replacement of the old back pressure turbine at AAK Karlshamn are investigated. AAK is a company that refines vegetable oils and one of the factories is in the town Karlshamn in Sweden. At AAK Karlshamn process steam and electricity is generated in a cogeneration facility whit several boilers and a back pressure turbine. To continue whit
Shifting flowering seasons is a global effect of climate change that can have important long-term evolutionary and demographic effects on plant communities. Life history optimization theory can be a valuable tool to assert the adaptive value and fitness effects of observed phenological shifts, but takes plant-plant competition rarely into account. Here we combine energy allocation models with evol
Some of the most fundamental chemical building blocks of life on Earth are the metal elements. X-ray absorption spectroscopy (XAS) is an element-specific technique that can analyse the local atomic and electronic structure of, for example, the active sites in catalysts and energy materials and allow the metal sites in biological samples to be identified and understood. A microfluidic device capabl
This study aims to synthesize a proton exchange membrane (PEM) by incorporating a sulfonated MIL-100(Fe) metal–organic framework (sMILFe MOF) into the sulfonated polysulfone (sPSf), to investigate the maximum capability of microbial fuel cells (MFCs) in organic degradation and electricity generation. The physicochemical properties of the membranes, such as water uptake (WU), ion exchange capacity
Multimetallic nanoparticles possess a variety of beneficial properties with potential relevance for various applications. These metallic nanoparticles can consist of randomly ordered alloys, which retain the properties of the constituting elements, or ordered intermetallics, which possess extended properties. Depending on the desired application, specific alloys or intermetallic compounds are requ
This study explores the efficacy of horizontally polarised shear (SH) waves in ultrasonic inspection of concrete-embedded steel liner plates, focusing on corrosion detection. SH-waves are found to significantly improve the localisation and potential dimensional assessment of embedded plate-like structures compared to com- pressional (P) waves, as evidenced by SH C-scans. Anomalies corre- sp
Quasi-two dimensional (2D) perovskites have emerged as a promising class of materials due to their remarkable photoluminescence efficiency, which stems from their exceptionally high exciton binding energies. The spatial confinement of excitons within smaller grain sizes could enhance the formation of biexcitons leading to higher radiative recombination efficiency. However, the synthesis of high-qu
Climate change driven increases in temperature are predicted to enhance oxidative stress as well as to accelerate telomere shortening and thus ageing in ectotherms. Understanding if and how populations can adapt to environmental stressors by altering telomere dynamics and decelerating the ageing process is therefore of major concern. I approached this question by taking advantage of two naturally
I och med en ökad konkurrens på marknaden blir det viktigare för var dag att hitta nya och innovativa sätt att urskilja sig på. Smurfit Kappa Sweden AB, en ledande tillverkare av produkter av wellpapp, papper och förpackningar letar alltid efter nya sätt att tillfredsställa nya kundbehov, ett av dem var att presentera kylvaror på liknande sätt som icke kylda varor. Syftet med examensarbetet var däIn today’s competitive food marketing, new innovative ways of standing out in a crowd grows more important by every day. Smurfit Kappa Sweden AB, a leading manufacturer of cardboard, paper and packaging products desired to meet customer demands, displaying refrigerated products in the same manner as non-refrigerated products. The objective of the thesis work was to examine and develop a new kind o
The production of single top quarks and top antiquarks via the t-channel exchange of a virtual W boson is measured in proton-proton collisions at a centre-of-mass energy of 13 TeV at the LHC using 140 fb−1 of ATLAS data. The total cross-sections are determined to be σtq=137−8+8 pb and σt¯q=84−5+6 pb for top-quark and top-antiquark production, respectively. The combined cross-section is found to be
Peer reviewed publications of fellows and researchers 2017S1PR (Sphingosine-1-Phosphate Receptor) Signaling in the Regulation of Vascular Tone and Blood Pressure: Is S1PR1 Doing the Trick? A Meissner. Hypertension June 2017. doi: 10.1161/HYPERTENSIONAHA.117.09200 Lubitz SA, Yin X, Lin HJ, Kolek M, Smith JG, Trompet S, Rienstra M, Rost NS, Teixeira P, Almgren P, Anderson CD, Chen LY, Engström G, Fo
https://www.wcmm.lu.se/publications-2017 - 2026-07-05
