1,707 research outputs found
Word frequency in fast priming: Evidence for immediate cognitive control of eye movements during reading
Numerous studies have demonstrated effects of word frequency on eye movements during reading, but the precise timing of this influence has remained unclear. The fast priming paradigm (Sereno & Rayner, 1992) was previously used to study influences of related versus unrelated primes on the target word. Here, we used this procedure to investigate whether the frequency of the prime word has a direct influence on eye movements during reading when the prime-target relation is not manipulated. We found that with average prime intervals of 32 ms readers made longer single fixation durations on the target word in the low than in the high frequency prime condition. Distributional analyses demonstrated that the effect of prime frequency on single fixation durations occurred very early, supporting theories of immediate cognitive control of eye movements. Finding prime frequency effects only 207 ms after visibility of the prime and for prime durations of 32 ms yields new time constraints for cognitive processes controlling eye movements during reading. Our variant of the fast priming paradigm provides a new approach to test early influences of word processing on eye movement control during reading
Hungarian International Development Cooperation: Context, Stakeholders and Performance
This paper explores the domestic and international context of Hungary's emerging international development policy. Specifically, it looks at three factors that may influence how this policy operates: membership in the European Union (EU) and potential âEuropeanizationâ, Hungary's wider foreign policy strategy, and the influence of domestic stakeholders. In order to uncover how these factors affect the country's international development policy, semi-structured interviews were carried out with the main stakeholders. The main conclusions are: (1) While accession to the EU did play a crucial role in restarting Hungary's international development policy, the integration has had little effect since then; (2) international development policy seems to serve mainly Hungary's regional strategic foreign policy and economic interests, and not its global development goals; and (3) although all the domestic development stakeholders are rather weak, the Ministry of Foreign Affairs (MFA) still seems to play a dominating role. Convergence with European requirements and best practices is, therefore, clearly hindered by foreign policy interests and also by the weakness of non- governmental stakeholders
Varieties of Limited Access Orders: The nexus between politics and economics in hybrid regimes
This article advances our understanding of differences in hybrid stability by going beyond existing regime typologies that separate the study of political institutions from the study of economic institutions. It combines the work of Douglass North, John Wallis, and Barry Weingast (NWW) on varieties of social orders with the literature on political and economic regime typologies and dynamics to understand hybrid regimes as Limited Access Orders (LAOs) that differ in the way dominant elites limit access to political and economic resources. Based on a measurement of political and economic access applied to seven postâSoviet states, the article identifies four types of LAOs. Challenging NWW's claim, it shows that hybrid regimes can combine different degrees of political and economic access to sustain stability. Our typology allows to form theoretical expectations about the kinds of political and/or economic changes that will move different types of LAOs toward more openness or closure
Modeling Phosphorus Loading to Lake Allatoona: Implications for Water Quality Trading
Proceedings of the 2007 Georgia Water Resources Conference, March 27-29, 2007, Athens, Georgia.Lake Allatoona, a large reservoir north of Atlanta Georgia that drains an area of about 2870 km2, is threatened by excessive algal growth and scheduled for a phosphorus (P) TMDL. In this paper, we use the Soil Water Assessment Tool (SWAT) computer model to estimate the total P load to Lake Allatoona during the periods 1992-1996 and 2001-2004. We also use the model to estimate the contribution from different sources in the watershed. The total P load to Lake Allatoona increased by 20% between the two time periods. The contribution from point sources decreased from 30% to 13% of the total load due to permit restrictions on P for poultry processing plants. The largest nonpoint source of P was estimated to be forest land use in 1992-1996 accounting for 31% of the load and urban land use in 2001-2004 accounting for 50% of the load. Poultry/cattle land use accounted for 18% in 1992-1996 and 15% in 2001-2004. The implications for a program to trade P credits are: 1) point sources and poultry/cattle operations account for similar percentages of the current load, 2) urban development accounts for most of the current P load and should be brought into a trading program, 3) poultry processing plants that have not upgraded to better P removal technology might trade their current load to wastewater treatment facilities that accept their wastewater, 4) cattle in streams and row crops are not large sources according to our model, and 5) there is little net loss of P to streams during transport to Lake Allatoona so distance of a source from the lake may not be important in a trading scheme.Sponsored and Organized by: U.S. Geological Survey, Georgia Department of Natural Resources, Natural Resources Conservation Service, The University of Georgia, Georgia State University, Georgia Institute of TechnologyThis book was published by the Institute of Ecology, The University of Georgia, Athens, Georgia 30602-2202. The views and statements advanced in this publication are solely those of the authors and do not represent official views or policies of The University of Georgia, the U.S. Geological Survey, the Georgia Water Research Institute as authorized by the Water Resources Research Act of 1990 (P.L. 101-397) or the other conference sponsors
The uniting of Europe and the foundation of EU studies: revisiting the neofunctionalism of Ernst B. Haas
This article suggests that the neofunctionalist theoretical legacy left by Ernst B. Haas is somewhat richer and more prescient than many contemporary discussants allow. The article develops an argument for routine and detailed re-reading of the corpus of neofunctionalist work (and that of Haas in particular), not only to disabuse contemporary students and scholars of the normally static and stylized reading that discussion of the theory provokes, but also to suggest that the conceptual repertoire of neofunctionalism is able to speak directly to current EU studies and comparative regionalism. Neofunctionalism is situated in its social scientific context before the theory's supposed erroneous reliance on the concept of 'spillover' is discussed critically. A case is then made for viewing Haas's neofunctionalism as a dynamic theory that not only corresponded to established social scientific norms, but did so in ways that were consistent with disciplinary openness and pluralism
From skylight input to behavioural output : a computational model of the insect polarised light compass
Many insects navigate by integrating the distances and directions travelled on an outward path, allowing direct return to the starting point. Fundamental to the reliability of this process is the use of a neural compass based on external celestial cues. Here we examine how such compass information could be reliably computed by the insect brain, given realistic constraints on the sky polarisation pattern and the insect eye sensor array. By processing the degree of polarisation in different directions for different parts of the sky, our model can directly estimate the solar azimuth and also infer the confidence of the estimate. We introduce a method to correct for tilting of the sensor array, as might be caused by travel over uneven terrain. We also show that the confidence can be used to approximate the change in sun position over time, allowing the compass to remain fixed with respect to âtrue northâ during long excursions. We demonstrate that the compass is robust to disturbances and can be effectively used as input to an existing neural model of insect path integration. We discuss the plausibility of our model to be mapped to known neural circuits, and to be implemented for robot navigation
Challenging assumptions of the enlargement literature : the impact of the EU on human and minority rights in Macedonia
This article argues that from the very start of the transition process in Macedonia, a fusion of concerns about security and democratisation locked local nationalist elites and international organisations intoa political dynamic that prioritised security over democratisation. This dynamic resulted in little progress in the implementation of human and minority rights until 2009, despite heavy EU involvement in Macedonia after the internal warfare of 2001. The effects of this informally institutionalised relationship have been overlooked by scholarship on EU enlargement towards Eastern Europe, which has made generalisations based on assumptions relevant to the democratisation of countries in Eastern Europe, but not the Western Balkans
A multipurpose machine to study paramagnetic species on well defined single crystal surfaces
A new ultrahigh vacuum (UHV) electron paramagnetic resonance (EPR)
spectrometer operating at 94 GHz to investigate paramagnetic centers on single
crystal surfaces is described. It is particularly designed to study
paramagnetic centers on well-defined model catalysts using epitaxial thin
oxide films grown on metal single crystals. The EPR setup is based on a
commercial Bruker E600 spectrometer, which is adapted to ultrahigh vacuum
conditions using a home made Fabry Perot resonator. The key idea of the
resonator is to use the planar metal single crystal required to grow the
single crystalline oxide films as one of the mirrors of the resonator. EPR
spectroscopy is solely sensitive to paramagnetic species, which are typically
minority species in such a system. Hence, additional experimental
characterization tools are required to allow for a comprehensive investigation
of the surface. The apparatus includes a preparation chamber hosting
equipment, which is required to prepare supported model catalysts. In
addition, surface characterization tools such as low energy electron
diffraction (LEED)/Auger spectroscopy, temperature programmed desorption
(TPD), and infrared reflection absorption spectroscopy (IRAS) are available to
characterize the surfaces. A second chamber used to perform EPR spectroscopy
at 94 GHz has a room temperature scanning tunneling microscope attached to it,
which allows for real space structural characterization. The heart of the UHV
adaptation of the EPR experiment is the sealing of the Fabry-Perot resonator
against atmosphere. To this end it is possible to use a thin sapphire window
glued to the backside of the coupling orifice of the Fabry Perot resonator.
With the help of a variety of stabilization measures reducing vibrations as
well as thermal drift it is possible to accumulate data for a time span, which
is for low temperature measurements only limited by the amount of liquid
helium. Test measurements show that the system can detect paramagnetic species
with a density of approximately 5 Ă 1011 spins/cm2, which is comparable to the
limit obtained for the presently available UHV-EPR spectrometer operating at
10 GHz (X-band). Investigation of electron trapped centers in MgO(001) films
shows that the increased resolution offered by the experiments at W-band
allows to identify new paramagnetic species, that cannot be differentiated
with the currently available methodology
The 1999 Hercules X-1 Anomalous Low State
A failed main-on in the 35d cycle of Her X-1 was observed with the Rossi
X-Ray Timing Explorer (RXTE) on 1999 April 26. Exceptions to the normal 35d
cycle have been seen only twice before; in 1983 and again 1993. We present
timing and spectral results of this latest Anomalous Low State (ALS) along with
comparisons to the main-on and normal low states. Pulsations were observed in
the 3-18 keV band with a fractional RMS variation of (0.037+-0.003). Spectral
analysis indicates that the ALS spectrum has the same shape as the main-on but
is modified by heavy absorption and scattering. We find that 70% of the
observed emission has passed through a cold absorber (N_H=5.0x10^{23}cm^{-2}).
This partially absorbing spectral fit can be applied to the normal low state
with similar results. We find that the ALS observations may be interpreted as a
decrease in inclination of the accretion disk causing the central X-Ray source
to be obscured over the entire 35d cycle.Comment: revised text, 6 revised figures, accepted for publication in Ap
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