Sökresultat
Filtrera
Filtyp
Din sökning på "*" gav 527357 sökträffar
Experimental and numerical study on bluff-body and swirl stabilized diffusion flames
Bluff-body and swirl flow are commonly utilized to stabilize diffusion flames in industrial applications, such as gas turbines, ramjets and furnaces. Flame stabilization mechanisms of these two kinds of burners are similar with each other: the interaction between the recirculation zone and the fuel jet. In the present paper, flow fields within flames stabilized by combinations of swirl flow and bl
Genotoxic effects of daily personal exposure to particle mass and number concentrations on buccal cells
The aim of this study is to assess personal exposure to Particle Number Concentrations (PNC) in four size ranges between 0.3 and 10 μm, and particulate matter (PM1; PM2.5; PM4; PM10) in order to evaluate possible genotoxic effects through a comet assay in buccal cells. A convenience cohort of 30 individuals from a Brazilian medium-sized city was selected. These individuals aged between 20 and 61 a
Performance of structural glass facades under extreme loads – Design methods, existing research, current issues and trends
Glass has been overwhelmingly used for windows and facades in modern constructions, for many practical reasons, including thermal, energy, light and aesthetics. Nevertheless, due to the relatively low tensile strength and mostly brittle behaviour of glass, compared to other traditional materials, as well as to a multitude of interacting structural and non-structural components, windows/facades are
A complete rethink is needed on how greenhouse gas emissions are quantified for national reporting
Multilevel analysis of individual heterogeneity and discriminatory accuracy (MAIHDA) within an intersectional framework
Background: Analyzing Body Mass Index as a didactical example, the study by Evans, Williams, Onnela, and Subramanian (EWOS study) introduce a novel methodology for the investigation of socioeconomic disparities in health. By using multilevel analysis to model health inequalities within and between strata defined by the intersection of multiple social and demographic dimensions, the authors provide
Tidal exchange in a choked coastal lagoon : A study of Mundaú Lagoon in northeastern Brazil
Changes in the inlet morphology of choked coastal lagoons often restrict the water exchange with the sea, making them vulnerable to pollution events and eutrophication processes. In this study, the importance of tides for the water exchange was investigated in Mundaú Lagoon, which is a choked lagoon located in northeastern Brazil that has a very dynamic inlet and channel system. The analysis was c
Two new species of Phanerochaete (Basidiomycota) and redescription of P. robusta
In the current study, the new species Phanerochaete bambucicola and P. incarnata, from subtropical Taiwan are presented, while P. robusta is redescribed. We amplified the 5.8 s and LSU ribosomal genes along with RPB1. We generated an ITS dataset and a concatenated 5.8 s + nLSU + RPB1 dataset, which we analyzed using Maximum Parsimony and Bayesian methods. Our results suggest that the two new speci
Tracer particle diffusion in a system with hardcore interacting particles
In this study, inspired by the work of Nakazato and Kitahara (1980 Prog. Theor. Phys. 64 2261), we consider the theoretical problem of tracer particle diffusion in an environment of diffusing hardcore interacting crowder particles. The tracer particle has a different diffusion constant from the crowder particles. Based on a transformation of the generating function, we provide an exact formal expa
Dynamic Testing Characterization of a Synchronous Reluctance Machine
The dynamic testing method has been shown to accurately characterize the electromagnetic model of permanent magnet synchronous machines by describing the relationship between the phase currents and the linked magnetic flux with minimal amount of test equipment compared to traditional methods. Within this work, a performance evaluation of the dynamic testing method applied to the synchronous reluct
Essays on Regional Economics
This thesis is, to its nature, somewhat wide in scope. The common denominator for theincluded essays is regional economics. Within this very wide area of research, the thesis isdivided rather sharply between one part regarding trading of emission permits in theinternational aviation sector and another part concerned with real estate markets. The basis ofthis thesis is five essays all written for t
Pappersarbete byggde det moderna Sverige
Inte bara de rika ska kunna bo i innerstan
En svensk flygskatt
No title
Unbounded dependencies in Swedish : apparent restrictions
Loss of inhibition in ipsilateral somatosensory areas following altered afferent nerve signaling from the hand
Cutaneous stimulation of the hand results in increased neural activity in the contralateral primary somatosensory cortex (S1) in humans, whereas an inhibition of neurons is seen in the ipsilateral S1.The aim of this study was to assess changes in neural activity in the S1 bilaterally, with a focus on the ipsilateral hemisphere, following altered afferent nerve signaling from the hand. Three cohort
Mapping Bedrock lithology in urban environment via large scale time domain induced polarization tomography
The present work is an example of a Direct-Current resistivity and time-domain Induced Polarization (DCIP) survey, carried out in an urban environment. The main goal of the survey is to map a weak zone in the bedrock, through which a tunnel will be constructed. Geophysical measurements in urban environments can be very complicated due to the restrictions of available space and the high levels of n
Structure reconsidered: Towards new foundations of explanatory transitions theory
The most prominent framework for studying socio-technical transitions to date is the multi-level perspective (MLP). While appreciated for its flexibility and usefulness for studying socio-technical transitions it has not been without its critics. In this paper we focus on the ontological foundations of the MLP and its (in)ability to explain transitions and how they come about. The purpose is to in
The impact of hetero-junction and oxide-interface traps on the performance of InAs/Si and InAs/GaAsSb nanowire tunnel FETs
Fabricated InAs/Si and InAs/GaAsSb vertical nanowire tunnel FETs are analyzed by physics-based TCAD with emphasis on the impact of hetero-junction and oxide-interface traps on their performance. After careful fitting of a minimum set of parameters, the effects of diameter scaling and gate alignment are predicted. Trap-assisted tunneling at the oxide interface is suppressed by scaling the diameter