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Gastrointestinal (GI) interventional endoscopy has evolved into a cornerstone of modern gastroenterology, offering minimally invasive solutions for complex conditions. However, these procedures are not without risk, particularly with respect to post-procedural infections. While rare, such infections can have significant clinical consequences and are increasingly recognized as a public health conce
A biorefinery can operate with various plant materials as feed stock, (in contrast to fossil-based oil refineries). It has been defined by the International Energy Agency, Task 42, as “the sustainable processing of biomass into a spectrum of marketable bio-based products (chemicals, materials) and bioenergy (biofuels, power, heat)”. One of the challenges in operating large-scale facilities is that
Human papillomavirus (HPV) vaccination may eventually eradicate oncogenic vaccine-targeted HPVs but only with a strategy that also protects unvaccinated individuals. We compared the impact of gender-neutral and girls-only vaccination strategies on the indirect and direct protection of unvaccinated and vaccinated young women against HPV16/18 infection using HPV16/18 seropositivity and PCR positivit
Laila Lalami’s novel The Moor’s Account reclaims the erased historical voice of the Moorish slave Estebanico, one of the first Arab Africans on the American continent in the 1500s. While Lalami explicitly positions her novel as a postcolonial revision of Cabeza de Vaca’s colonial report on the fate of Estebanico, this essay argues that a significant part of the novel’s literary resistance to Arab
This article presents a theoretical framework for deriving simple analytical expressions for spurs resulting from second and third order nonlinearities in fractional-N phase locked loops (PLL). Furthermore, a previously proposed linearization technique where several sigma-delta modulators (SDMs) operate in parallel with relative time offsets between them, is further analyzed using the periodic non
PurposeWelfare technology (WT) intends to promote engagement in everyday activities and the well-being of older adults at risk of developing or already having impairments. However, its effectiveness depends on how older adults experience and interact with WT. In this study, we aimed to investigate the relationship between various forms of WT user experience (perceived usability, perceived control,
The new year in Sweden began with some record-breaking cold temperatures. Temperatures in the village of Kvikkjokk in the northern Swedish part of Lapland dropped to -43.6°C, the lowest recorded since records began in 1887.Yet for the majority of Swedish households, heating is not an issue. Those living in the multi-household apartment blocks that characterise Sweden’s towns and cities enjoy avera
With the urgent need to address climate change, it is critical to confront fossil fuel dependency, particularly in the Global North. This requires confronting the spatio-cultural dimensions of fossil fuels, including how they have become embedded in those locations most closely tied to the fossil fuel industry. This article integrates insights from energy geographies with Hein's concept of petrole
This thesis studies reproducing kernels that are realized as pointwise quotients of two other kernels, including far-reaching generalizations of de Branges–Rovnyak spaces. In the first article, we study reproducing kernels arisingfrom the well-known multiplier criterion. They are intimately connected to certain operator inequalities, such asthe famous inequality of Shimorin in sub-Bergman spaces,
Despite a wealth of sophisticated CFD-methods, most designs are still based on one-dimensional and two-dimensional inviscid analytical tools. In such methods, realistic loss and angle assessment are indeed critical in order to arrive at correct loading, flow coefficient and reaction. The selected values are normally retained through the detailed design sequence for each iteration. This means that
With a significant impact on turbomachinery blade performance, surface curvature distribution becomes one of the essential factors in the design of high-efficiency blades. This study focuses on applying computational fluid dynamics (CFD) to evaluate turbine rotor blade performance. The main aim is to analyze the influence of incidence and geometry shape on the performance of a gas-turbine blade in
In this work, numerical analysis was performed to predict the behaviour of high Reynolds number turbulent cross-flows used in film cooling applications. The geometry included one row of three discrete coolant holes inclined at 30 degrees to the main flow. In the computational model, the width of the channel was cut into one sixth and symmetry boundaries were applied in the centreline of the coolan
A numerical and experimental study of partial admission in a low reaction two-stage axial air test turbine is performed in this paper. In order to model one part load configuration, corresponding to zero flow in one of the admission arcs, the inlet was blocked at one segmental arc, at the leading edge of the first stage guide vanes. Due to the unsymmetrical geometry, the full annulus of the turbin
In this paper, the effects of axial gap distance between the first stage stator and rotor blades and multiblocking on aerodynamics and performance of partial admission turbines are analyzed numerically. The selected test case is a two stage axial steam turbine with low reaction blades operating with compressed air. The multiblocking effect is studied by blocking the inlet annulus of the turbine in
HTML clipboard Numerical analysis of partial admission in axial turbines is performed in this work. Geometrical details of an existing two stage turbine facility with low reaction blades is used for this purpose. For validation of the numerical results, experimental measurements of one partial admission configuration at design point was used. The partial admission turbine with single blockage had
Background. Climate change is the greatest threat to human health in the 21st century and healthcare contributes to approximately 5% of global greenhouse gas emissions. Intensive and perioperative care are particularly resource intensive. This thesis aimed to assess the climate and environmental impacts of perioperative and intensive care (Papers I–III) and to explore how environmental outcomes an
This chapter critically examines the pervasive belief that economic progress naturally leads to increased leisure time. While early 20th-century thinkers like John Maynard Keynes predicted a future of abundant free time driven by productivity gains, work hours in many high-income countries have stagnated or increased since the 1980s. The chapter argues that this paradox is not the result of indivi
Tudo o que comemos gera impactos ambientais: do uso do solo na lavoura, passando pelo transporte, processamento, consumo e descarte de embalagens e resíduos. Entender esse impacto ambiental da alimentação é complexo, mas já existem informações suficientes para orientar decisões mais bem informadas.
