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We show exponential lower bounds on resolution proof length for pigeonhole principle (PHP) formulas and perfect matching formulas over highly unbalanced, sparse expander graphs, thus answering the challenge to establish strong lower bounds in the regime between balanced constant-degree expanders as in [Ben-Sasson and Wigderson’01] and highly unbalanced, dense graphs as in [Raz’04] and [Razborov’03
The literature within Information Systems has approached Green IS from different perspectives and using different theoretical frameworks. The present paper analyzes the corre-lation between the existence of external pressures and Green IS adoption in the case of Swe-dish municipalities. A qualitative research was conducted, with the performance of in-depth interviews with representatives of a 4 Sw
Objectives To describe the first-in-man experience with the ClearLumen Thrombectomy System (Walk Vascular, Irvine, CA) and report on its safety, feasibility and efficacy when used as an adjunctive therapy during primary PCI. Background Thrombus aspiration (TA) aims to improve microvascular perfusion but currently available devices are not optimal. Methods Prospective, single-centre, non-randomized
Icke-erkända stater utgör ett främmande element i det internationella systemet. Tidigare forskning har dock visat att icke-erkända stater ofta har en beskyddarstat (patron state), som stödjer staten militärt såväl som finansiellt. Denna uppsats undersöker varför beskyddarstaten Turkiet erkänt Nordcypern, medan beskyddarstaten Armenien inte erkänt Nagorno Karabach. Fallen påminner bortsett från d
Securing access to land around the world is an issue that pervades many development agendas. Often promoted through legal and administrative systems, secure land tenure is used in the battle against poverty and to reduce land based conflict. Conceptualizations of secure tenure tend to differ between international institutions and academia. This thesis aims to understand how the World Bank concept
Boreal forests store the majority of their carbon in the soil and play an important role in the global carbon cycle. However, the mechanisms that control carbon storage in boreal soils are not well understood. In recent studies, there has been a specific focus on how ectomycorrhizal (ECM) fungi influence carbon dynamics in boreal forests, particularly through their nitrogen acquisition. A major pa
This MA thesis introduces Europeana and information science principles to the field of museology. Its aim is to identify challenges in digital cultural heritage metadata management within an international context. To do this, this thesis focuses on specific aspects: the European Data Model, international cooperation, and the metadata management process specific to Europeana. The study is designed
With the advancement of artificial intelligence, customers and users in general have been more used to having a virtual assistance method for service-related tasks. However, in the shopping centre industry, the self-help solutions mostly follow the traditional pattern of having a conciérge or a totem where you can look for the location of a particular store. This thesis aims to look at this with a
The relationship between inequality and conflict has been widely studied in the literature, finding non-significant results. However, the availability of new statistical software and geographical databases has boosted new literature on the topic, focusing on the regional level. Mozambique is now suffering a wave of conflicts whose causes seem varied. Using a negative-inflated binomial regression a
Both post-colonialism and historical novels are highly topical research themes in today’s literary field, but storytelling as a genre has lost its status. This essay aims to look at the importance of storytelling in the 2014 published novel The Moor’s Account, and how storytelling can be connected to post-colonial rewritings of history. This is achieved through looking at the emphasis on storytell
Studies from the public health and epidemiologic fields consider self-assessment of health as a solid measure of general health due to its predictive ability in relation to mortality. Empirical evidence in this direction have justified the generalized use of this measure in health surveys as well as its application to the general population. However, it is important to evaluate whether these findi
This work describes the two-way coupling performed between the regional atmospheric model Brazilian Regional Atmospheric Modeling System (BRAMS) and the hydrological model MGB-IPH. As a first step of the atmosphere-hydrology coupling, only the water balance variables were coupled. Differences in temporal and spatial scales between MGH-IPH and BRAMS were analyzed. By default, MGB-IPH has a daily ti
Experimental measurements of the adiabatic burning velocity in methane + hydrogen + air flames using the Heat Flux method are presented. The hydrogen content in the fuel was varied from 0 to 20%. Non-stretched flames were stabilized on a perforated plate burner from 20 to 100 kPa. The equivalence ratio was varied from 0.8 to 1.4. Adiabatic burning velocities of CH4 + H-2 + air mixtures were found
Objectives To determine the effect of an ultrasound training course on the performance of pattern recognition when used by less experienced examiners and to compare the performance of pattern recognition, a logistic regression model and a scoring system to estimate the risk of malignancy between examiners with different levels of experience. Methods Using ultrasound images of selected adnexal mass
Numerous economic recovery packages have been implemented to stimulate green economic growth through the deployment of low-carbon technologies. The emerging literature shows, however, that there is substantial ambiguity and discrepancy about how to measure the performance of policy instruments driving a Green Economy in general, and in our case, a Green Energy Economy (GEE) in particular. Identifi
