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Effects of pilot H2 injection on the thermoacoustic instability of premixed CH4/air flames were experimentally investigated with varied hydrogen injection rates and different injection strategies. The flames were stabilized on a swirl burner with a central pilot-fuel injection tube. The flame structure was captured using high-speed OH* chemiluminescence and OH-PLIF methods, while the CO and NOx em

Background: ‘Collegial Midwifery Assistance’ (CMA) is a clinical practice aiming to reduce severe perineal trauma (SPT) during childbirth. This practice involves two midwives being present during the active second stage of labour rather than one, which is the case in standard care. The effectiveness of CMA was evaluated in the Oneplus trial and a 30% reduction in SPT was shown. Aim: The aim was to

In this paper, we estimate the vulnerability of railway infrastructure, switches, signals, tracks, and catenaries to different weather conditions, temperature, precipitation, snow depth, and wind speed across the entire Swedish railway network between 2006-2020. Using a method to quantify the fault rate we establish thresholds that can be useful for identifying areas of concern for operations. Res

Weather impacts several aspects of our daily life, of which the way we travel is one. The relationship between weather phenomena and ridership of trains has not received much attention previously. The study we present here aims to understand the impact of temperature, wind, and precipitation on passenger volumes for commuter trains. To do so we make use of automatic passenger count and weather dat

Introduction: To develop the diving capacity in the Swedish armed forces the current air decompression tables are under revision. A new decompression table named SWEN21 has been created to have a projected risk level of 1% for decompression sickness (DCS) at the no stop limits. The aim of this study was to evaluate the safety of SWEN21 through the measurement of venous gas emboli (VGE) in a dive s

The Båstad tennis protest of 1968: Left-wing activism and right-wing counter-mobilisationIn the spring of 1968, Sweden was supposed to play a Davis Cup tennis match against Rhodesia, a quasi-apartheid state in southern Africa. The game was scheduled to be played on 3 May in the small town of Båstad in southern Sweden. However, hundreds of anti-racist activists gathered and stopped the game from st

Superbasic ionic liquids (SBILs) are being investigated as potential carbon dioxide (CO2) gas capture agents, however, the presence of H2O in the flue stream can inhibit the uptake of CO2. In this study a thin film of the SBIL trihexyltetradecylphosphonium 1,2,4-triazolide ([P66614][124Triz]) was deposited onto rutile TiO2 (110) using in situ electrospray deposition and studied upon exposure to CO

OBJECTIVE: To analyse survival rates and causes of death in adults with spina bifida in Sweden compared with a matched control group.DESIGN AND METHODS: This population-based study included 11,900 adults born between 1950 and 1997. Three national Swedish registers were used to identify individuals with a diagnosis of spina bifida and a matched control group without spina bifida in the period 1990-

During periods of predation risk, prey adopt antipredator behaviours to maximise chances of survival, such as increased vigilance, reduced foraging time, shifting to safe habitat, and group formation. To effectively balance resource acquisition and antipredator behavior, prey animals make use of cues within their environment that provide them accurate information about the realistic threat of pred

This package facilitates working with probability distributions by means of Monte-Carlo methods, in a way that allows for propagation of probability distributions through functions. This is useful for, e.g., nonlinear uncertainty propagation. A variable or parameter might be associated with uncertainty if it is measured or otherwise estimated from data. We provide two core types to represent proba

Engle (1982) explained in his classic paper what is meant by a "good" interval forecast. His main insight was that intervals should be narrow in tranquil times and wide in volatile times so that the times when the interval forecast fails are spread out over the sample and not come in clusters. On the basis of Engle's criterias, Christoffersen (1998) was the first to form a complete t

Most polymeric materials used today are not simple homopolymers, but consist of more than one polymer, which lead to morphologies of different length scale and shape. It is important to receive knowledge of the morphologies because the properties of the materials change depending on the structure. This thesis describes methods developed to study polymer morphologies by electron microscopy and also

In recent years, Vietnam has witnessed its economic slowdown. In the labor market, low wages, poor working conditions, violations of labor law are common; labor disputes and strikes increase and these have been negatively affecting workers' lives. Reason for this situation is that the market economy has developed at a higher level; Vietnamese enterprises have become more and more competitive. In t

Reviews and practice guidelines for paediatric obsessive-compulsive disorder (OCD) recommend cognitive-behaviour therapy (CBT) as the psychological treatment of choice, but note that it has not been sufficiently evaluated for children and adolescents and that more randomized controlled trials are needed. The aim of this trial was to evaluate effectiveness and optimal delivery of CBT, emphasizing c

Flying animals need continual sensory feedback about their body position and orientation for flight control. The visual system provides essential but slow feedback. In contrast, mechanosensory channels can provide feedback at much shorter timescales. How the contributions from these two senses are integrated remains an open question in most insect groups. In Diptera, fast mechanosensory feedback i

The epidemic potential of Chikungunya virus (CHIKV) was recently made evident by its introduction and rapid expansion in the Caribbean and the Americas. We sought to gain a detailed understanding of the dynamics of the epidemic in Mexico, the country with the highest number of confirmed CHIKV cases in the Americas, and to characterise viral evolution at the population and intra-host level. Analysi