1,712 research outputs found
Bibliography on HIV/AIDS in Ethiopia and Ethiopians in the Diaspora: The 2006 Update
No Abstract. The Ethiopian Journal of Health Development Vol. 21 (1) 2007: pp. 70-9
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The quality of political information
The article conceptualizes the quality of political information and shows how the concept can be used for empirical research. I distinguish three aspects of quality (intelligibility, relevance, validity) and use them to judge the constituent foundations of political information, that is component claims (statements of alleged facts) and connection claims (argumentative statements created by causally linking two component claims). The resulting conceptual map thus entails six manifestations of information quality (component claimintelligibility, connection claim intelligibility, component claimrelevance, connection claim relevance, component claim validity, and connection claim validity). I explain how the conceptual map can be used to make sense of the eclectic variety of existing research, and how it can advance new empirical research, as a guide for determining variation in information quality, as a conceptual template for the analysis of different types of political messages and their common quality deficiencies, and as a generator of new research questions and theoretical expectations
Bibliography on HIV/AIDS in Ethiopia and Ethiopians in the Diaspora: The 2013 Update
No Abstrac
Antenna design for microwave hepatic ablation using an axisymmetric electromagnetic model
BACKGROUND: An axisymmetric finite element method (FEM) model was employed to demonstrate important techniques used in the design of antennas for hepatic microwave ablation (MWA). To effectively treat deep-seated hepatic tumors, these antennas should produce a highly localized specific absorption rate (SAR) pattern and be efficient radiators at approved generator frequencies. METHODS AND RESULTS: As an example, a double slot choked antenna for hepatic MWA was designed and implemented using FEMLABâą 3.0. DISCUSSION: This paper emphasizes the importance of factors that can affect simulation accuracy, which include boundary conditions, the dielectric properties of liver tissue, and mesh resolution
The declining representativeness of the British party system, and why it matters
In a recent article, Michael Laver has explained âWhy Vote-Seeking Parties May Make Voters Miserableâ. His model shows that, while ideological convergence may boost congruence between governments and the median voter, it can reduce congruence between the party system and the electorate as a whole. Specifically, convergence can increase the mean distance between voters and their nearest party. In this article we show that this captures the reality of todayâs British party system. Policy scale placements in British Election Studies from 1987 to 2010 confirm that the pronounced convergence during the past decade has left the Conservatives and Labour closer together than would be optimal in terms of minimising the policy distance between the average voter and the nearest major party. We go on to demonstrate that this comes at a cost. Respondents who perceive themselves as further away from one of the major parties in the system tend to score lower on satisfaction with democracy. In short, vote-seeking parties have left the British party system less representative of the ideological diversity in the electorate, and thus made at least some British voters miserable
Youâre Having Fun When Time Flies: The Hedonic Consequences of Subjective Time Progression
Seven studies tested the hypothesis that people use subjective time progression in hedonic evaluation. When people believe that time has passed unexpectedly quickly, they rate tasks as more engaging, noises as less irritating, and songs as more enjoyable. We propose that felt time distortion operates as a metacognitive cue that people implicitly attribute to their enjoyment of an experience (i.e., time flew, so the experience must have been fun). Consistent with this attribution account, the effects of felt time distortion on enjoyment ratings were moderated by the need for attribution, the strength of the âtime fliesâ naive theory, and the presence of an alternative attribution. These findings suggest a previously unexplored process through which subjective time progression can influence the hedonic evaluation of experiences
The Dynamical Evolution of the Pleiades
We present the results of a numerical simulation of the history and future
development of the Pleiades. This study builds on our previous one that
established statistically the present-day structure of this system. Our
simulation begins just after molecular cloud gas has been expelled by the
embedded stars. We then follow, using an N body code, the stellar dynamical
evolution of the cluster to the present and beyond. Our initial state is that
which evolves, over the 125 Myr age of the cluster, to a configuration most
closely matching the current one.
We find that the original cluster, newly stripped of gas, already had a
virial radius of 4 pc. This configuration was larger than most observed,
embedded clusters. Over time, the cluster expanded further and the central
surface density fell by about a factor of two. We attribute both effects to the
liberation of energy from tightening binaries of short period. Indeed, the
original binary fraction was close to unity. The ancient Pleiades also had
significant mass segregation, which persists in the cluster today.
In the future, the central density of the Pleiades will continue to fall. For
the first few hundred Myr, the cluster as a whole will expand because of
dynamical heating by binaries. The expansion process is aided by mass loss
through stellar evolution, which weakens the system's gravitational binding. At
later times, the Galactic tidal field begins to heavily deplete the cluster
mass. It is believed that most open clusters are eventually destroyed by close
passage of a giant molecular cloud. Barring that eventuality, the density
falloff will continue for as long as 1 Gyr, by which time most of the cluster
mass will have been tidally stripped away by the Galactic field.Comment: 45 pages, 13 figures, 2 tables; Accepted for publication in MNRA
Bibliography on HIV/AIDS in Ethiopia and Ethiopians in the Diaspora: The 2011 Update
No abstract
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