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https://www.byggmek.lth.se/english/education/ - 2026-07-18

The macrocyclic ketone (MK) group of fragrance ingredients was evaluated for safety following a complete literature search. For high end users, calculated maximum dermal exposures vary from 0.13% to 1.10%; systemic exposures vary from 0.0005 to 0.0441 mg/kg/day. The MKs had low acute toxicity and no significant repeat dose toxicity. Liver weight and blood biochemistry effects were reversible after

It is expected that, in the future, gas turbines will be operated on gaseous fuels currently unutilized. The ability to predict the range of feasible fuels, and the extent to which existing turbines must be modified to accommodate these fuels, rests on the nature of these fuels in the combustion environment. Understanding the combustion behavior is aided by investigation of syngases of similar com

The present study deals with the question of cult locales in city gate contexts in Iron Age Palestine. Both archaeological and biblical sources are analysed in order to determine the presence of gate cult locales and indicate some directions of interpretation. A general framework for the archaeological identification of cult (as proposed by Colin Renfrew and others) is discussed and applied within

Spectral hole burning and photon echoes are the techniques for frequency-selective optical memories, which have the potential to increase areal data storage density by a factor 10**7. They also have the capability to perform in-memory data processing. In this thesis, several materials and techniques for optical memories in the frequency- and time domain have been investigated. In the frequency do

Popular Abstract in Swedish Är narkomaners personlighet relaterad till den drog som de valt att använda och föredrar? Detta undersöktes i en grupp om 128 tunga narkotikamissbrukare varav 37 var kvinnor och 91 män. De tre droger det gällde var heroin, som användes av 30 kvinnor och 52 män, amfetamin (7 kvinnor och 32 män) och hasch (7 män). Narkomanernas personlighet bestämdes med hjälp av två percThe topic dealt with in this thesis is whether, as Wieder and Kaplan (1969) suggest, the personality of drug addicts is related to their particular drug of choice. The subjects were 128 heavy drug addicts, 37 women and 91 men, each of them selected for the fact of there being one basic drug he/she abused. The drug of choice was either heroin (30 women, 52 men), amphetamine (7 women, 32 men) or can

This thesis deals primarily with the production of written texts by adults with reading and writing difficulties. Their writing is analysed from three different aspects: error analysis, non-error-oriented text analysis and analysis of the production process. These studies are based on data from on-line recordings of writing. The main question is how the written language production of adults with r

Syftet med denna tvärsnittsstudie var att undersöka barns förståelse för empatiska reaktioners relationella innebörd och om denna skiljer sig beroende på ålder, samt undersöka om samband fanns mellan denna förmåga och förmåga till socialt perspektivtagande. Undersökningen jämförde barn i grundskolans årskurs 2 (n = 15, M = 8:7 år), årskurs 5 (n = 17, M = 11:8 år) och årskurs 8 (n = 13, M = 14:10 åThis cross-sectional study explored children’s understanding of empathic reactions relational meaning and if this understanding increases with age. It also explored an association between this ability and ability for social perspective taking. Comparisons were made between second graders (n = 15, M = 8:7 years), fifth graders (n = 17, M = 11:8 years) and eighth graders (n = 13, M = 14:10 years). T

A novel method of indirect deposition by means of a focused ion beam (FIB) is utilized to develop metal/insulator/semiconductor nanowire core-shell structures. This method is based upon depositing an annular pattern centered on a nanowire, with secondary deposition then coating the wire. Typical cross-sectional deposition area increments as a function of ion doses are 1.3 x 10(-2) mu m(2) nC(-1) f

This paper introduces a model of the atrioventricular node function during atrial fibrillation (AF), and describes the related ECG-based estimation method. The proposed model is defined by parameters that characterize the arrival rate of atrial impulses, the probability of an impulse choosing either one of the two atrioventricular nodal pathways, the refractory periods of these pathways, and the p

The negative impacts of surface ozone (O(3)) on vegetation are determined by external exposure, leaf gas exchange and plant antioxidant defence capacity, all dependent on climate and CO(2) concentrations. In this study the influence of climate change on simulated stomatal O(3) uptake of a generic crop and a generic deciduous tree at ten European sites was investigated, using the LRTAP Mapping Manu

This paper presents class-D CMOS oscillators capable of an excellent phase noise performance from a very low power supply voltage. Starting from the recognition of the time-variant nature of the class-D LC tank, accurate expressions of the oscillation frequency, oscillation amplitude, current consumption, phase noise, and figure-of-merit (FoM) have been derived. Compared with the commonly used cla

In recent years, application of ensemble models has been increased tremendously in various types of natural hazard assessment such as landslides and floods. However, application of this kind of robust models in groundwater potential mapping is relatively new. This study applied four data mining algorithms including AdaBoost, Bagging, generalized additive model (GAM), and Naive Bayes (NB) models to

Bridges are critical assets within transportation networks, and their failure, whether due to accidental actions, extreme environmental events, or localized damage, can lead to consequences that extend far beyond the structure itself. In addition to direct safety implications, bridge failures often result in prolonged traffic disruption, economic losses, and reduced network resilience. As traffic

The purpose of this study is to examine the optimal hedge ratio for the currency exposure of foreign investments. The optimal hedge ratio is determined after evaluating our portfolios from the three perspectives; ex-ante, ex-post and profit/loss. The ex-ante perspective is examined by the usage of historical simulation to calculate VaR on 11 portfolio pairs. Each pair consists of a portfolio with

With significant changes expected in the earth's global climate over the next century, due to global warming, and its resulting changes in the frequency and amount of precipitation, there has been growing concerns on climate change impacts on water resources. Especially concerned to water managers and governments is the potential impacts on groundwater aquifers since they are the main availabl

BACKGROUND: Long COVID and cardiovascular autonomic dysfunction, including postural orthostatic tachycardia syndrome (POTS), present significant healthcare challenges. Long-term monitoring is challenging due to the evolving nature of symptoms and the limited availability of objective diagnostic tools. With over 200 million electrocardiogram (ECG)-enabled smartwatches sold worldwide, these devices

Background: The ability of modern ultrasound machines to detect signs of enthesitis has increased, yet there is a lack of studies on patients with long-standing radiographic axial spondyloarthritis (r-axSpA). Hence, we aimed to investigate the prevalence and clinical significance of Doppler signals indicative of inflammation in peripheral entheses of patients with long-standing disease. Methods: P

The excited state decay kinetics of chromatophores of the purple photosynthetic bacterium Rhodospirillum rubrum have been recorded at 77 K using picosecond absorption difference spectroscopy under strict annihilation free conditions. The kinetics are shown to be strongly detection wavelength dependent. A simultaneous kinetic modeling of these experiments together with earlier fluorescence kinetics