Search results

Filter

Filetype

Your search for "*" yielded 532593 hits

On prediction of tip leakage flow and heat transfer in gas turbines

Abstract in UndeterminedA numerical study has been performed to simulate the tip leakage flow and heat transfer on the first stage of a high-pressure turbine, which represents a modern gas turbine blade geometry. The low Re k-ω (SST) model is used to model the turbulence. Calculations are performed for both a flat and a squealer blade tip for three different tip gap clearances. The computations we

Äldre och design

Institutionen för Designvetenskaper på lth presenterar här sitt första forskningsprogram inom området "Äldre och Design". Flera av institutionens forskningsavdelningar har en mångårig, i vissa fall tioårig tradition på området, och nu förs insatserna sa

Asylum claims and the translation of culture into politics

Since the early 1990s, we have witnessed how the system of asylum law reacts to the relativization of the nation-state in the global domain. The growing emphasis on cultural aspects in the conceptualization of "being persecuted" has stressed the dimension of positive obligations. This emphasis has widened the discretionary margin of decision makers. The substantive vacuum at the "human rights core

Effects of lattice reordering on Schnorr-Euchner decoding algorithms for MIMO systems

Schnorr-Euchner (SE) decoding algorithm for MIMO sys tems has been shown to approach the performance of Maximum-likelihood decoder with low complexity. There are two kinds of SE decoder, sequential SE and K-best SE. The lattice reordering, as the preprocessing of the SE de coder, is divided into four modes in this paper, according to post-detection signal-to-noise ratio (SNR) and channel noise lev

Interaction between fixed dual particles at moderate Reynolds numbers

Numerical simulations of 3D flow past two identical spheres which are held fixed relative to each other at different separation distances and angles (which describe the deviation from the centre line of the trailing particle) are carried out. Particle Re = 300 is used to investigate the dependency of drag and lift coefficients on the separation distances and the angles. The simulations are perform

Nonlinear Analysis of Cavities in Rock Salt

The paper covers some material and computational aspects of the rock mechanics of leached cavities in salt. A material model is presented in which the instantaneous stiffness of the salt is obtained by interpolation between the unloaded state and a relevant failure state. The model enables prediction of short term triaxial behaviour from uniaxial stress-strain curves. Key results from a nonlinear

Segregation of Women in Public Space in Iran

As part of a systematic endeavor to Islamize the society, Iranian Islamic government has bestowed efforts to create gender-segregated public urban spaces. The gender segregation was formally enforced in public places such as schools, sport halls, swimming pools, transportation facilities, etc. in last three decades. The most recent effort of the government includes “women-only parks”, claimed to b

Articulating the role of Greece in the economic crisis: an analysis of the media discourses of the extreme right in Denmark and Sweden

The rise of the far right in Europe is central to an understanding of the new political variables emerging in the face of the European economic crisis. This paper focuses on the media representations of Greece and its role in the economic crisis by extra-parliamentarian groups of the far right in Denmark and Sweden. It demonstrates how the parliamentary extreme right in these countries “blame” Gre

Stimulus Duration and Type in Perception of Female and Male Speaker Age

In a small perception study, our ability to estimate speaker age from speech samples was investigated with respect to stimulus duration, stimulus type and speaker gender. Four separate listening tests were carried out with four different sets of stimuli: 10 and 3 seconds of spontaneous speech, one isolated word, and 6 concatenated isolated words, all produced by the same 24 speakers. The results s

Estimation of absorbed PAR across Scandinavia from satellite measurements. Part II: modeling and evaluating the fractional absorption.

The aim of this study is to generate a quality-controlled sub-kilometer dataset of the fraction of absorbed photosynthetically active radiation (FAPAR) across Scandinavia from satellite. FAPAR is required for estimating the amount of PAR absorbed (APAR) by vegetation, which in turn allows for estimation of carbon uptake. In this study, FA-PAR was modeled from normalized difference vegetation index