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P>1. Female preferences for particular male ornaments may shift between populations as a consequence of ecological differences that change the reliability and detectability of the ornament, but few studies have examined how ornaments function in different populations. 2. We examined the signalling function of male plumage ornaments in a warbler, the common yellowthroat (Geothlypis trichas), breedi
This report aims to investigate the possibilities to implement a high temperature heat pump at a Dow facility in Landskrona. By implementing a heat pump, waste heat from the production can be recovered and reused in the process. The question at issue is whether there will be enough energy available when needed due to an intermittent process, and if a heat pump will be feasible to implement. To inv
I detta examensarbete görs en utvärdering av ankomstprognoser för tåg för att se hur de olika prediktionskällorna står sig mot varandra och hur pass väl dessa efterspeglar verkligheten. Vidare är detta examensarbete en sprint av ett forskningsprojekt som genomförs och bedrivs på Lunds Tekniska Högskola på uppdrag av Trafikverket. Till skillnad från forskningsprojektet bygger detta examensarbetIn this master thesis, an evaluation of arrival forecasts for trains is made to see how various prediction sources compare to each other and how well these reflect reality. Furthermore, this thesis is a sprint of a research project that is carried out and conducted at Lund University of Technology on behalf of the Swedish Transport Administration. Unlike the research project, this thesis is based
Detta examensarbete har utförts i syfte att jämföra hur fyra olika databashanterare (DBMS) presterar inom ett begränsat antal områden för att därigenom dra slutsatser kring vilken som fungerar bäst för att lagra data om rabatter på IKEA. De databashanterare som testas är MongoDB, MariaDB, Neo4j och PostgreSQL. För att åstadkomma en jämförelse utfördes en form av testning - en benchmark. Benchmarke
In Sweden, about 150-200 children annually are born with some form of cleft lip and/or palate, making it the most common facial malformation in the country. Treatment often involves one or more surgeries and the speech development is followed up by a speech pathologist from the first year of life. One of the most common speech deviation for children with a cleft palate is hypernasality, which come
Changing demographics in most of western society bring a range of new demands in the field of food and more specifically in food packaging. The need for convenience is one of the biggest drivers behind many innovations over the past decades. Current trends involve psychological convenience on environmental aspects, as well as ease of opening. Easy to open packaging is desirable because consumers w
The knowledge on the optics of fogbows is scarce, and their polarization characteristics have never been measured to our knowledge. To fill this gap we measured the polarization features of 16 fogbows during the Beringia 2005 Arctic polar research expedition by imaging polarimetry in the red, green and blue spectral ranges. We present here the first polarization patterns of the fogbow. In the patt
In comparison with instrumental sight reading of musical notation, sight singing is typically characterized by the presence of lyrics. The purpose of this study was to explore how skilled sight singers divide their visual attention between written music and lyrics and how their eye-movement behavior is influenced by musical stimulus complexity. Fourteen competent musicians performed 10 newly compo
The data visualization softwares Qlikview and Qlik Sense are based on an associative data model, and this thesis analyzes different tools and methods for solving 0-1 integer programs as well as examines their applicability to the computational engine behind these softwares. The first parts are dedicated to a theoretical background on mathematical optimization, linear programming and Qlik’s impleme
Syreupptagningsförmåga är en bra indikator av kardiopulmonär hälsa, men be- höver speciell utrustning och är tidskrävande att mäta. Det finns sätt att upp- skatta syreupptagningsförmåga baserat på andra faktorer så som puls och accele- ration. Målet med denna masteruppsats var att undersöka om modeller som upp- skattar syreupptag baserat på accelerationsdata insamlad från sensorer i smartp- hones,Oxygen uptake is a great indicator of cardiopulmonary health but requires spe- cialized equipment and is time consuming to measure. There are ways to estimate oxygen uptake based on other factors such as heart rate and acceleration. The aim of this master thesis was to investigate whether models estimating oxygen uptake based on acceleration data collected from the sensors in smartphones, and step
There are spatial elements and factors in every social activity. Physical environment in particular and its characteristics has a significant effect in the social decisions and outcomes of a location and of the residents of disadvantaged areas. These spatial elements and factors have been the main focus in many researches and studies about young people’s socio-economic statuses and achievements. T
I gällande rätt har kommuner som driver grundskolor ett culpaansvar. Det innebär att så länge skyldigheterna som stadgas i skollagen följts åt, eller kommunen inte på annat sätt agerar oaktsamt, uppstår inte skadeståndsskyldighet. Uppsatsen har som syfte att undersöka om det är lämpligt ett införa ett strängare skadeståndsansvar. Ett alternativ är att lagstifta om rent strikt ansvar. Då blir komIn current legislation the municipality that operates an elementary school has a liability for negligence. As long as the municipality or school follows the obligations that are stipulated in the education act, or in no other way acts with negligence, damages does not occur. This essay aims to examine whether it is appropriate to introduce a stricter liability or not. One alternative is to legis
Tungsten (W) and niobium (Nb) belong to the refractory metal group and are used as alloying elements in steels and superalloys for high demand products. These metals are also used in a high purity single-phase state for products within nuclear, space, military and research facilities.In the current study, tool wear development and surface quality at different cutting conditions have been evaluated
IntroductionThe Multidimensional Pain Inventory (MPI) is frequently used in the assessment of chronic pain. Three subgroups have been derived from MPI: Adaptive Coper (AC), Dysfunctional (DYS) and Interpersonally Distressed (ID). The primary aim of was to examine whether outcome of Interdisciplinary Multimodal Pain Rehabilitation Programs (IMMRPs) differed across the MPI subgroups.MethodsChronic p
In recent years, air ventilation garments (AVG) have been reported effective to improve thermal comfort. In this study, an AVG incorporated with small fans was investigated on torso thermal comfort in moderate environment (Ta=25 °C, RH=50 %). Eight female subjects walked on the treadmill at a speed of 4 km·h−1 for 30 min and then rested for another 30 min. During the whole test protocol, the AVG w
