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Recent years have seen an increasing attention given to wireless Personal Area Networks (PANs), which are typically networks with small transmitter-receiver (TX-RX) separation. The desire for high data rates has led to an interest in deploying multiple-input multiple-output (MIMO) transmission for such systems, but up until this date there exists, to the authors’ best knowledge, no MIMO channel mo
The modeling of fuel cells requires the coupling of fluid transport with electro-chemical reactions. There are two approaches commonly used. Firstly, the electrodes can be treated as two planes, where the potential gradient can be considered as being locally one-dimensional. In this case a two dimensional current density distribution is obtained. Secondly, the two electrode layers can be spatially
Vid tiden för riksdagen 1809-1810 befann sig riket Sverige i kaos. Landets kung hade blivit avsatt samtidigt som de var i krig med både Ryssland och Frankrike. Samtidigt började nya idéer och tankar om reformer cirkulera i samhället. Bondeståndet reflekterade avundsamt kring adel- och prästeståndens privilegier som gav dessa skattelättnader, medan bönderna själva i stort sett saknade möjligheter tThe situation in Sweden was chaotic when the Swedish parliament assembled in 1809-1810. They were at war with Russia and France and had no king to lead them to neither victory nor peace. At the same time new ideas formed and thoughts of reformation circulated among the people. The peasantry contemplated their unprivileged state compared to the nobility and the clergy. They had to pay more taxes an
Personers reaktioner har studerats genom experimentella studier samt i genomgång av litteraturen. I denna undersökning har valet av utrymningsväg vid en simulerad brand studerats utifrån olika förutsättningar vad avser avstånd till utrymningsvägen och om dörren var öppen eller stängd. En andra del i försöket studerade hur personer reagerade och uppfattade situationen om en liten brand befann sig mHow people react on fire alarm have been studied in retrospect as well as in experiments. In the present study, the choice of exit was examined with respect to the distance to exits and open or closed emergency exit. The second part covers the question on how the subjects think and react in a situation having a small fire in the escape route. The third part deals with some communication aspects re
Intercalated composite materials were prepared with CaAl-layered double hydroxide as host and Cu(II)-amino acid (L-cysteine, L-histidine and L-tyrosine) complex anions as guests. Two methods (intercalation of the ligand first followed by constructing the complex; preforming the complex first, then introducing it among the layers of the host) and optimization of the synthesis conditions were perfor
Intercalated composite materials were prepared with CaAl-layered double hydroxide as the host and Mn(II)-amino acid (l-cysteine, l-histidine and l-tyrosine) complex anions as the guest. Two methods (intercalation of the ligand first followed by constructing the complex; preforming the complex first, then introducing it among the layers of the host) and optimization of the auxiliary conditions were
The degenerative process in Alzheimer´s disease (AD) follows a temporal and topographic pattern of early and accentuated involvement of temporal limbic, parietal and posterior cingulate cortices. We have studied a pedigree with four generations suffering from early onset AD linked to a presenilin-1 gene mutation. This family now contains 7 AD cases, neuropathologically confirmed in four cases of t
Protein dynamics have been investigated on a wide range of time scales. Nano- and picosecond dynamics have been assigned to local fluctuations, while slower dynamics have been attributed to larger conformational changes. However, it is largely unknown how fast (local) fluctuations can lead to slow global (allosteric) changes. Here, fast molecule-spanning dynamics on the 100 to 200 ns time scale in
The airflow field around air-intake related geometries has been investigated experimentally and numerically. The configuration of the experimental set-up is used to model a jet engine running near the ground. The experiments have been carried out using both PIV and LDA techniques in order to obtain the mean and fluctuating velocity field as well as the low speed frequencies related to the system o
This paper describes a development process concerning the active involvement of staff of different professions in developing and implementing methods for assessment of activities of daily living (ADL) in home-based geriatric rehabilitation. Although a variety of established ADL instruments exist, at the time for this study no I-ADL (Instrumental Activities of Daily Living) instrument suitable for
Gear hobbing is well established and one of the most cost effective manufacturing methods of involute gears. In the hobbing of lead crown corrected helical gears, a well know drawback is the non-uniform systematic tooth alignment deviation that arises. This is sometimes denoted as flank twist. The inevitable tooth alignment deviation, together with other source deviations, must not exceed the spec
In order to validate and to gain confidence in two micro-beam techniques: particle induced X-ray emission with nuclear microprobe technique (mu-PIXE) and synchrotron radiation induced X-ray fluorescence in a confocal alignment (confocal SR mu-XRF) for characterization of microscopic particles containing actinide elements (mixed plutonium and uranium) a comparative study has been performed. Inter-c
The purpose of this research was to investigate the potentiality of the Chinese market for olive oil and to assess how accessible China is for in particular small & medium sized companies in order to take the initiative on the market. The research departs from the CAP subsidy reforming European olive oil sector with 2,5 million producers on their way to a less trade distorted and more export m
Bakgrund: Sömn är en grundläggande förutsättning för människans generella hälsa och ett gott sömnmönster är grundläggande för att individer ska kunna utföra sina dagliga aktiviteter. Detta examensarbete utgår från de beteendemässiga aspekterna av människans sömn. Sömnmönstret definieras utifrån fem parametrar: sömnlatens, antal nattliga uppvaknanden, totalt antal sömntimmar under natten, total sömA good sleep pattern is fundamental for an individual to be able to carry out their daily activities. This thesis aims to examine the behavioral aspects of human sleep patterns. The term sleep pattern is defined by five parameters: sleep latency, nocturnal awakenings, sleep duration, sleep quality and circadian rhythm. Our aim was to investigate how the sleep patterns of university students at thr
The aim was to describe hematopoietic stem cell (HSC) donors' experiences focusing on information and side effects during the first year after donation. Our prospective Swedish cohort study with adult HSC donors was performed from 2019 to 2022, with questionnaires at four time points from before until 12 months after donation. 173 unrelated and 68 related donors participated, and the majority dona
Decrease of the human brain temperature was induced by intranasal cooling. The main purpose of this study was to compare the two magnetic resonance methods for monitoring brain temperature changes during cooling: phase-difference and magnetic resonance spectroscopic imaging (MRSI) with high spatial resolution. Ten healthy volunteers were measured. Selective brain cooling was performed through nasa
Laser-induced fluorescence measurements have been performed in turbulent non-premixed flames close to the lift-off point and in laminar premixed acetylene flames. The spectrally analyzed fluorescence signal showed good correspondence to known spectra from glyoxal (C2H2O2). Laser-induced fluorescence spectra from glyoxal vapor using the same excitation wavelength of 428 nm showed the same strongest
Long-term tall-tower eddy-covariance (EC) measurements have been recently established in three European pilot cities as part of the ICOS-Cities project. We conducted a comparison of EC software to ensure a reliable generation of interoperable flux estimates, which is the prerequisite for avoiding methodological biases and improving the comparability of the results. We analyzed datasets covering 5
Investigations of past fires suggest that building occupants faced with a fire have problems defining the severity of it, especially in the early stages of the fire. An experiment was therefore carried out to study people’s ability to estimate fire growth, and their perceived ability to extinguish a fire using a portable fire extinguisher. A total of 535 persons, namely 304 men and 231 women, were
