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In many existing buildings, energy conservation measures have significantly reduced the demands for heat supply. In new buildings, advances in a wide range of technologies have led to even greater reductions. On the other hand, demands for electrical energy have risen noticeably. Unfortunately, it now seems that the use of both heat and electrical energy is starting to increase, especially in non
Regional production and utilization of biomass in Sweden is analysed, considering the potential of replacing fossil fuels and producing new electricity. Extensive utilization of biomass will decrease biomass-transportation distances. The average distance for biomass transportation to a large-scale conversion plant suitable for electricity or methanol production will be 30–42 km when the conversion
District heating systems using cogeneration, as well as local fuel-based and electric heating systems for detached houses, are analysed. The analysis includes the whole energy system, from the natural resource to the end user, with respect to primary energy use, emission and cost. The end-use technologies studied are heat pumps, resistance heaters and boilers. It was assumed that the base-load ele
The thesis comprises an analysis of the heat transfer phenomenon in solid oxide fuel cells (SOFCs) and a description of various transport phenomena in a solid oxide electrolysis cell. Both devices are encompassed under the solid oxide electrochemical cell concept. Moreover, a CFD model of an SOEC was developed to study the behavior of the cell under different conditions of operating and structural
Industrial energy efficiency is one of the most important means of reducing the threat of increased global warming. Research however states that despite the existence of numerous technical energy efficiency measures, its deployment is hindered by the existence of various barriers to energy efficiency. The complexity of increasing energy efficiency in manufacturing industry calls for an interdiscip
Chemicals is the industrial sector with the highest energy demand, using a substantial share of global fossil energy and emitting increasing amounts of greenhouse gasses following rapid growth over the past 25 years. Emissions associated with energy use have increased with growth in coal-dependent regions but are also commonly underestimated in regions with higher shares of renewable energy. Renew
Lotta MaunsbachAvtal om rätten till domstolsprövningProcessuella överenskommelsers giltighet i svensk rättDatum för disputation: fredagen den 22 maj 2015Fakultetsopponent: professor Torbjörn Andersson, Uppsala universitetÄmne: processrättAbstractRätten till domstolsprövning är en grundläggande rättighet som förekommer i alla demokratiska stater. Utgångspunkten är att alla har rätt att få sina tvis
https://www.jur.lu.se/forskning/disputationer/disputationer-2015 - 2026-07-01
Hudcancer, inklusive malignt melanom, keratinocytcancer (tidigare icke-melanomhudcancer) och också mer sällsynta hudcancerdiagnoser ökar snabbt i de flesta ljushyade populationer. En hudcancerdiagnos ger inte bara inverkan på hälsoekonomiska mätvärden utan också främst på individens livskvalitet. I vår forskargrupp fokuserar vi på kliniskt baserad och registerbaserad hudcancerforskning men även tiSkin cancers, including malignant melanoma, keratinocyte cancer (formerly non- melanoma skin cancer) and also more rare skin cancers are increasing rapidly in most fair-skinned populations. A skin cancer diagnosis has impact not only on health economics but also on the quality of life of the individual. In our research group we focus on clinical skin cancer research as well as on translational ski
Hållbarhet och beredskap är tätt sammankopplade när det gäller livsmedelsproduktion. Sveriges livsmedelssystem är sårbart: mycket av maten produceras utomlands och en stor del av vår livsmedelsproduktion är beroende av foder och gödsel som transporteras hit via långa logistikkedjor. Livsmedelssystemet är byggt för kostnadseffektivitet runt några få centrala noder, med minimal lagerhållning och kor
We prove that for k ≫; 4√n regular resolution requires length nω(k) to establish that an ErdÅ's-Rényi graph with appropriately chosen edge density does not contain a k-clique. This lower bound is optimal up to the multiplicative constant in the exponent and also implies unconditional nω(k) lower bounds on running time for several state-of-the-art algorithms for finding maximum cliques in graphs.
We prove that unary Sherali-Adams requires proofs of size nΩ(d) to rule out the existence of an nΘ(1)-clique in Erdős-Rényi random graphs whose maximum clique is of size d ≤ 2 log n. This lower bound is tight up to the multiplicative constant in the exponent. We obtain this result by introducing a technique inspired by pseudo-calibration which may be of independent interest. The technique involves
Over the past decade, organic–inorganic hybrid perovskites have revolutionized next-generation semiconductors, driving unprecedented advancements in cost-effective optoelectronics. While lead-based perovskite semiconductors exhibit exceptional optoelectronic properties, their inherent toxicity and vulnerability to environmental degradation remain significant barriers to widespread commerciali
District heating (DH) is an efficient urban heating solution. Numerous external factors (energy efficiency, fuel-price increases, heat -pump competition and policy changes) are challenging. It is relevant to explore long-term cost-competitiveness of DH. A model has been developed testing three, future DH pathways: (i) phase out of biomass (aligned to the cascading principle of the EU Taxonomy), (i
27 september 2025 12:00 till 17:00 | Barn- och ungdomsevenemang, Övrigt Nyfiken på vetenskap? Välkommen till oss! På Vattenhallen Science Center finns det mycket att upptäcka. Se en spännande show på stora scenen, utforska våra 5 interaktiva utställningar, prova experimenten i röda korridoren och gå på visning i planetariet.FORSKARFREDAG I VATTENHALLENDen här lördagen har Vattenhallen gratis inträ
https://www.lu.se/evenemang/fritt-intrade-pa-vattenhallen-tillsammans-med-forskarfredag - 2026-07-01
Mervärdeskatterätten utgör ett fullständigt harmoniserat område inom EU och medlemsstaternas lagstiftning på området är till sin helhet baserad på EU rätten. En uniform tillämpning av momsreglerna i medlemsstaterna är av stor vikt för mervärdesskattesystemets funktion. Skyldigheten att tolka nationell lag i enlighet med EU rätten är därför ett viktigt instrument för att säkerställa en uniform tillThe area of VAT constitutes a completely harmonized area within the EU and the national provisions in this area are to their entirety based on EU law. A uniform application of the VAT provisions throughout the EU therefore becomes essential in order to ensure the proper function of the VAT system. The obligation for national courts to interpret national law in conformity with EU law becomes an imp
