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We consider the “minor” and “homeomorphic” analogues of the maximum clique problem, i.e., the problems of determining the largest h such that the input graph (on n vertices) has a minor isomorphic to Kh or a subgraph homeomorphic to Kh, respectively, as well as the problem of finding the corresponding subgraphs. We term them as the maximum clique minor problem and the maximum homeomorphic clique p
Researchers have proposed hardware, software, and algorithmic optimizations to improve the computational performance of deep learning. While some of these optimizations perform the same operations faster (e.g., increasing GPU clock speed), many others modify the semantics of the training procedure (e.g., reduced precision), and can impact the final model's accuracy on unseen data. Due to a lack of
Up until the late nineteenth and early twentieth century, and probably since the introduction of agriculture to Sweden, the social life, culture, traditions, building patterns and material culture would largely have been based on agricultural practices. And yet, in the archaeological record, agricultural aspects of social life remain elusive and little is known about the organization of farming an
Evaluation, prioritization and selection of candidate requirements are of tremendous importance and impact for subsequent software development. Effort, time as well as quality constraints have to be taken into account. Typically, different stakeholders have conflicting priorities and the requirements of all these stakeholders have to be balanced in an appropriate way to ensure maximum value of the
Addressing global water crises demands effective communication across diverse audiences, especially in initiatives such as the scientific decade HELPING by the International Association of Hydrological Sciences (IAHS). This study synthesizes insights from the hydrological community, gathered through interviews, workshops and a digital survey. We identify key challenges and best practices across th
Vid utformandet av en konstitution ställs alltid frågan om vilket förhållande som bör råda mellan politik och juridik. Det är upp till varje rättssystem att reglera vilket inflytande domstolen ska ha på utformningen av lagstiftningen. När det kommer till lagstiftning kan förhållandet mellan judiciell aktivism från domstolens sida och demokrati beskrivas som en dikotomi där två vitt skilda metoder When drafting a Constitution, the relationship between politics and law must always be determined. It is up to each legal system to regulate what influence the court should have on the formulation of legislation. When it comes to legislation, the relationship between judicial activism and democracy, can be described as a dichotomy in which two widely different methods stand for different ideals. T
Popular Abstract in Swedish Bröstcancer är den vanligaste cancerformen hos kvinnor i Sverige. Årligen drabbas 7000 kvinnor i Sverige och cirka 1500 kvinnor dör av sin sjukdom. Bröstcancer uppkommer genom ett samspel mellan livsstil, miljö och gener. En kvinna som har en förstagradssläkting (t.ex. syster, mor) med bröstcancer har ungefär dubbelt så stor risk att drabbas av bröstcancer jämfört med eApproximately 7000 women are diagnosed and 1500 women die from breast cancer in Sweden every year. The aim of this thesis was to study the interplay of polymorphisms, hormone levels, lifestyle, and the use of concomitant medication in relation to risk and prognosis in two cohorts: one composed of young healthy women from high-risk breast cancer families and the other of breast cancer patients fro
The increasing amount of renewable energy in the electrical grid comes with several challenges, of which overvoltage and congestion (overcurrents) are the subjects of this work. One flexible way of handling these problems is active management by some control system. There is a trade-off between simplicity when implementing the control system and the performance. In the project Active Network Manag
Background: Block-sequential regularized expectation maximization (BSREM), commercially Q. Clear (GE Healthcare, Milwaukee, WI, USA), is a reconstruction algorithm that allows for a fully convergent iterative reconstruction leading to higher image contrast compared to conventional reconstruction algorithms, while also limiting noise. The noise penalization factor β controls the trade-off between n
The urgency of global climate change and other geological-scale anthropogenic impacts also suggests new perspectives on economic history. This thesis argues for the inclusion into economic history of more Earth-system centred feedbacks, both in terms of environmental and climatic consequences and environmental and climatic causes, where consequences in one realm may again become causal in the othe
Popular Abstract in Swedish Det svenska samhället har förändrats mycket genom invandring under de senaste årtiondena. Många barn i Sverige har idag ett annat modersmål än svenska. De flesta barn tillägnar sig svenska utan problem, medan så inte är fallet för vissa barn. Dessa skillnader har diskuterats, och olika förklaringar till detta har framhållits, till exempel bristfällig exponering för svenThe aim of this thesis was to provide both epidemiological and linguistic data on bilingual children with language impairment (LI), since few data on this group exist. Data from 438 bilingual and monolingual children, referred over a period of 12 months, were compared in the first epidemiological study. The results showed that the bilingual children with suspected LI were referred significantly l
Popular Abstract in Swedish Trots ett sunt leverne med regelbunden motion och nyttig mat kan vi inte alltid förhindra risken att drabbas av vissa typer av cancer som till exempel hjärntumörer. Den vanligaste formen av elakartade hjärntumörer heter glioblastoma multiforme och är också den mest aggressiva. Symptomen varierar beroende på tumörens storlek och var i hjärnan den växer, och patienter kanGlioblastoma multiforme (GBM) is the most common and aggressive primary malignant brain tumor in adults. Despite standard treatment including surgery, radiotherapy and temozolomide (TMZ)-based chemotherapy, the prognosis for GBM patients is dismal, and there is a need for novel treatments. One possible therapeutic treatment modality presented here is immunotherapy, either alone or combined with in
Popular Abstract in Swedish Multikonjugerad Adaptiv Optik för Astronomiska Teleskop 1. Atmosfärisk turbulens Allt sedan man på 1600-talet började bruka optiska instrument inom astronomin, för att understödja det mänskliga ögat då man beskådade stjärnhimlen, har astronomer strävat efter att bygga allt större och bättre teleskop för att kunna se längre ut i rymden och skönja allt ljussvagare objekt.This work analyses several aspects of multi-conjugate adaptive optics (MCAO) for astronomy. The research ranges from fundamental and technical studies for present-day MCAO projects, to feasibility studies of high-order MCAO instruments for the extremely large telescopes (ELTs) of the future. The first part is an introductory exposition on atmospheric turbulence, adaptive optics (AO) and MCAO, esta
1 Utbildningsplan 1. IDENTIFIKATION • Programmets namn och inriktning: musikerutbildning, jazz-improvisation. • Omfattning i högskolepoäng: 180. • Nivå: G. • Programkod: KGMUS. Inriktning: JAIN. • Utbildningsplanen är beslutad i Konstnärliga fakultetsstyrelsen den 14 februari 2007. Utbild ningsplanen träder i kraft den 1 juli 2007. 2. PROGRAMBESKRIVNING Musikerutbildning, jazz-improvisation, syfta
https://www.mhm.lu.se/sites/mhm.lu.se/files/kgmus_jain_sve.pdf - 2026-07-21
Enzymes are involved in most reactions in nature. They are important both for the understanding of biological life and for reactions of industrial interest, e.g. in the production of artificial fertilizers, the production of biomass or biofuels. Enzymes with one or several metal ions are called metalloenzymes. In this thesis we study three different metalloenzymes, nitrogenase, lytic polysaccharid
Background, policy relevance and aim Background A growing human population and higher per-capita consumption rates of food and bio-energy call for a strong increase of agricultural production globally. Maintaining high agricultural production through intensive conventional agriculture with its reliance on agro-chemical inputs, however, threatens the long-term sustainability of agriculture and co
https://www.cec.lu.se/research/finished-research-projects/multagri/multagri-project - 2026-07-21
This thesis consists of three essays on VIX futures and options, and deals with issues highly relevant to all financial markets, such as understanding the operation of markets and developing flexible and tractable pricing models for contracts traded in them. It consists of four chapters. Chapter 1 provides a short introduction to the VIX and a brief explanation of how the old and new VIX are cons
Background: Despite uniform operating techniques, lack of fusion still occurs after ankle arthrodesis. Differences in the biological healing potential may be a factor but the mechanical performance of the arthrodesis construct because of varying bone quality also may be important. Internal compression techniques are preferred because of higher union rates, shorter fusion times, and fewer complicat
In circumpolar regions, coastlines offer rich constellations of diverse resources, and have long been a focus of human habitation. Despite the rich archaeological records that are located along many northern coastlines, there is a relatively limited understanding of the range of factors that informed local settlement strategies. Northern Norway has one of the world’s longest and best-preserved arc
