Search results for "Tick"
showing 10 items of 166 documents
Drivers and barriers to online airline ticket purchasing
2009
Although online sales of airline tickets are growing, many travellers are still reluctant to use the web as a purchase channel. Given the cost advantages of online sales for airlines, it is useful for them to know the main drivers and barriers affecting the use of the Internet to purchase tickets. This study analyses the influence of risk, perceived usefulness and perceived ease of use on the airline ticket online purchase intention. The results of a survey show that perceived purchase risk and perceived usefulness exercise a direct influence on airline ticket purchasing intentions, while perceived ease of use has an indirect influence through perceived usefulness. Psychological risk, perfo…
Social Choice in the Real World II: Cyclical Preferences and Strategic Voting in the Finnish Presidential Elections
1997
The empirical relevance of the theoretical results of social choice theory is still unclear. The most radical thesis, put forth by William Riker, is that politics is a highly unstable process, characterized by preference cycles and strategic voting. This article - a continuation of an earlier article published in this journal - examines the Finnish presidential election in 1925, 1931, 1937 and 1982. The conclusion is that preference cycle and strategic voting have had a significant impact in the discussed cases. The relevancy of the social choice approach and its relation to historical research are discussed.
ei.Datasets: Real Data Sets for Assessing Ecological Inference Algorithms
2021
Ecological inference models aim to infer individual-level relationships using aggregate data. They are routinely used to estimate voter transitions between elections, disclose split-ticket voting behaviors, or infer racial voting patterns in U.S. elections. A large number of procedures have been proposed in the literature to solve these problems; therefore, an assessment and comparison of them are overdue. The secret ballot however makes this a difficult endeavor since real individual data are usually not accessible. The most recent work on ecological inference has assessed methods using a very small number of data sets with ground truth, combined with artificial, simulated data. This arti…
The importance of being first : Effects of candidates’ list positions in the 2003 Bavarian state election
2006
Abstract Normative theories of democracy do not pay much attention to technicalities of voting, implicitly assuming that these do not influence voting behaviour and election outcomes significantly. However, it is not clear whether this is actually the case. In this article we analyse whether one such technical detail matters for voting behaviour: the ballot position. Based on previous research in the field, we discuss ballot position effects and deduce hypotheses concerning list position effects in the 2003 Bavarian state election. In the empirical analysis, it turns out that ballot positions had a considerable influence on voting behaviour in this election, especially, the top position on …
Turkey's bid for EU membership, contrasting views of public opinion, and vote choice. Evidence from the 2005 German federal election
2008
Abstract This paper examines the effects of attitudes toward Turkey's entry into the European Union on vote choice in the 2005 federal election in Germany. Building on prior research, the paper contrasts the elitist and the policy voting view. The evidence shows that citizens' opinions about Turkey's accession to the European Union do not merely reflect group-memberships and political predispositions. They also play a role in influencing voting behaviour with support of Turkey's entry raising the likelihood to vote for the SPD or the Greens while reducing the probability to cast a vote for right-wing parties, the CDU/CSU and the FDP. Finally, low educated voters are disproportionately susce…
Consistent isotopic differences between Schistocephalus spp. parasites and their stickleback hosts
2015
Published version available at http://dx.doi.org/10.3354/dao02893 Parasite−host systems show markedly variable patterns in isotopic fractionation: parasites can be either depleted or enriched in 15N and 13C as compared to their hosts. However, it remains unknown whether isotopic fractionation patterns are similar in comparable parasite−host systems from markedly different ecosystems. Results of this study show that large-sized Schistocephalus spp. endoparasites are consistently depleted in 15N (by on average −2.13 to −2.20‰) as compared to their nine-spined stickleback Pungitius pungitius and three-spined stickleback Gasterosteus aculeatus hosts. The differences between parasites and host f…
Spatial data of Ixodes ricinus instar abundance and nymph pathogen prevalence, Scandinavia, 2016-2017.
2020
ticks carry pathogens that can cause disease in both animals and humans, and there is a need to monitor the distribution and abundance of ticks and the pathogens they carry to pinpoint potential high risk areas for tick-borne disease transmission. In a joint Scandinavian study, we measured Ixodes ricinus instar abundance at 159 sites in southern Scandinavia in August-September, 2016, and collected 29,440 tick nymphs at 50 of these sites. We additionally measured abundance at 30 sites in August-September, 2017. We tested the 29,440 tick nymphs in pools of 10 in a Fluidigm real-time PCR chip to screen for 17 different tick-associated pathogens, 2 pathogen groups and 3 tick species. We present…
A spatially resolved investigation of oxygen adsorption on polycrystalline copper and titanium by means of photoemission electron microscopy
2004
Abstract The interaction of oxygen with polycrystalline copper and titanium surfaces was studied by means of photoemission electron microscopy. Variations in the image brightness were used to determine the work function of different Cu crystallites. The change of the work function was monitored during oxygen adsorption on both, Cu and Ti. Those changes are smooth for Cu whereas different Ti crystallites exhibit a rather complicated behavior during oxygen adsorption. The transformation of brightness versus exposure curves into work function versus coverage curves allows to determine the initial dipole moment of the adsorbed oxygen atoms. A value of about 20 mD was found for O on Cu(1 1 0). V…
Sticking Probability on Zeolites
2006
The sticking coefficient, i.e., the probability that, on hitting the surface of a nanoporous particle (zeolite), a molecule shall be able to enter the intracrystalline space, is a key quantity for the application of such materials in heterogeneous catalysis and molecular sieving. On the basis of pulsed field gradient NMR diffusion measurements and molecular dynamics simulations, typical values of this probability are found to be close to one. They exceed previous estimates on the basis of IR uptake measurements by many orders of magnitude.
The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reaction
1993
“Hot” dimers are molecules which after adsorption dissociate and each of the remaining “hot” monomers fly apart up to a maximum distance R from the original adsorption site. The influence of the “hot”-dimer adsorption mechanism on relevant aspects of the bimolecular catalyzed reaction of the type A − (1/2)B2(“hot”) → AB is studied by means of the Monte-Carlo simulation technique. The temporal evolution of both the reactant's coverages as well as the rate of AB-production is evaluated and discussed. Due to the enhanced probability of “hot” species for encounters with other adsorbed particles, the rate of AB-production becomes faster when increasing R. This behavior may be relevant in the dyn…