Publications des institutions partenaires

S'abonner aux flux infonet economy   2761 - 2780 of 5584

Das Engagement jedes Einzelnen ist wichtig

Unternehmerisches Denken und Handeln bedingt auch das Wissen um die Verantwortung für die sozialen und ökologischen Belange einer Volkswirtschaft. Die Übernahme von Ehrenämtern durch engagierte Personen ist dabei eine Möglichkeit der Umsetzung dieser Verantwortung. Dass ein solches Engagement zu einem festen Bestandteil des universitären Lebens gehört,
zeigen die drei Autoren...

Full Text

Deutsch / 01/01/2011

Struggles in the diffusion of high-end medical technology in Switzerland and in Canada

This book examines the diffusion process for a complex medical technology, the PET scanner, in two different health care systems, one of which is more market-oriented (Switzerland) and the other more centrally managed by a public agency (the province of Quebec in Canada). More specifically, this research draws on institutional and socio-political theories of the diffusion of...

Full Text

English / 01/01/2011

Optimal sampling of paid content

This paper analyzes optimal sampling and pricing of paid content for publishers of news websites. Publishers offer free content samples both to disclose journalistic quality to consumers and to generate online advertising revenues. We examine sampling where the publisher sets the number of free sample articles and consumers select the articles of their choice. Consumerslearn from the...

Full Text

English / 01/01/2011

When rivals merg, think before you follow suit

Many companies react to competitors’ acquisition sprees refl exively, by launching bids of their own. Smart managers should consider other moves.

Full Text

English / 01/01/2011

Preferences for health insurance and health status: does it matter whether you are Dutch or German?

This contribution seeks to measure preferences for health insurance of individuals with and without chronic conditions in two countries, Germany and the Netherlands. The objective is to test the presumption that preferences between these two subpopulations differ and to see whether having a chronic condition has a different influence on preferences depending on the country. The...

Full Text

English / 01/01/2011

Affective priming effects of musical sounds on the processing of word meaning

Recent studies have shown that music is capable of conveying semantically meaningful concepts. Several questions have subsequently arisen particularly with regard to the precise mechanisms underlying the communication of musical meaning as well as the role of specific musical features. The present article reports three studies investigating the role of affect expressed by various...

Full Text

English / 01/01/2011

Consonance and the closure method in multiple testing

Consider the problem of testing s null hypotheses simultaneously. In order to deal with the multiplicity problem, the classical approach is to restrict attention to multiple testing procedures that control the familywise error rate (FWE). The closure method of Marcus et al. (1976) reduces the problem of constructing such procedures to one of constructing single tests that control the...

Full Text

English / 01/01/2011

Transitional and translational studies of risk for anxiety

Adolescence reflects a period of increased rates of anxiety, depression, and suicide. Yet most teens emerge from this period with a healthy, positive outcome. In this article, we identify biological factors that may increase risk for some individuals during this developmental period by: (1) examining changes in neural circuitry underlying core phenotypic features of anxiety as...

Full Text

English / 01/01/2011

Concurrent TMS-fMRI reveals dynamic interhemispheric influences of the right parietal cortex during exogenously cued visuospatial attention

We used concurrent transcranial magnetic stimulation and functional MRI (TMS-fMRI) during a visuospatial cueing paradigm in humans, to study the causal role of the right angular gyrus (AG) as a source of attentional control. Our findings show that TMS over the right AG (high vs. low intensity) modulates neural responses interhemispherically, in a manner that varies dynamically with...

Full Text

English / 01/01/2011

Short-term compassion training increases prosocial behavior in a newly developed prosocial game

Compassion has been suggested to be a strong motivator for prosocial behavior. While research has demonstrated that compassion training has positive effects on mood and health, we do not know whether it also leads to increases in prosocial behavior. We addressed this question in two experiments. In Experiment 1, we introduce a new prosocial game, the Zurich Prosocial Game (ZPG),...

Full Text

English / 01/01/2011

Consistent spectral predictors for dynamic causal models of steady-state responses

Dynamic causal modelling (DCM) for steady-state responses (SSR) is a framework for inferring the mechanisms that underlie observed electrophysiological spectra, using biologically plausible generative models of neuronal dynamics. In this paper, we examine the dynamic repertoires of nonlinear conductance-based neural population models and propose a generative model of their power...

Full Text

English / 01/01/2011

Network discovery with DCM

This paper is about inferring or discovering the functional architecture of distributed systems using Dynamic Causal Modelling (DCM). We describe a scheme that recovers the (dynamic) Bayesian dependency graph (connections in a network) using observed network activity. This network discovery uses Bayesian model selection to identify the sparsity structure (absence of edges or...

Full Text

English / 01/01/2011

Generative embedding for model-based classification of FMRI data

Decoding models, such as those underlying multivariate classification algorithms, have been increasingly used to infer cognitive or clinical brain states from measures of brain activity obtained by functional magnetic resonance imaging (fMRI). The practicality of current classifiers, however, is restricted by two major challenges. First, due to the high data dimensionality and low...

Full Text

English / 01/01/2011

Functional magnetic resonance imaging investigation of the amphetamine sensitization model of schizophrenia in healthy male volunteers

These transient load-dependent abnormalities of frontal and temporal activity induced by amphetamine sensitization support neuroimaging findings in schizophrenic patients, implying that amphetamine sensitization may help to bridge pathophysiological theories of schizophrenia that focus on pharmacological (dopaminergic) and cognitive mechanisms, respectively.

Full Text

English / 01/01/2011

Dynamic causal models and physiological inference: A validation study using isoflurane anaesthesia in rodents

Generative models of neuroimaging and electrophysiological data present new opportunities for accessing hidden or latent brain states. Dynamic causal modeling (DCM) uses Bayesian model inversion and selection to infer the synaptic mechanisms underlying empirically observed brain responses. DCM for electrophysiological data, in particular, aims to estimate the relative strength of...

Full Text

English / 01/01/2011

An in vivo assay of synaptic function mediating human cognition

The contribution of dopamine to working memory has been studied extensively [1-3]. Here, we exploited its well characterized effects [1-3] to validate a novel human in vivo assay of ongoing synaptic [4, 5] processing. We obtained magnetoencephalographic (MEG) measurements from subjects performing a working memory (WM) task during a within-subject, placebo-controlled, pharmacological...

Full Text

English / 01/01/2011

Skin conductance response to the pain of others predicts later costly helping

People show autonomic responses when they empathize with the suffering of another person. However, little is known about how these autonomic changes are related to prosocial behavior. We measured skin conductance responses (SCRs) and affect ratings in participants while either receiving painful stimulation themselves, or observing pain being inflicted on another person. In a later...

Full Text

English / 01/01/2011

Generalised filtering and stochastic DCM for fMRI

This paper is about the fitting or inversion of dynamic causal models (DCMs) of fMRI time series. It tries to establish the validity of stochastic DCMs that accommodate random fluctuations in hidden neuronal and physiological states. We compare and contrast deterministic and stochastic DCMs, which do and do not ignore random fluctuations or noise on hidden states. We then compare...

Full Text

English / 01/01/2011

Pages

Le portail de l'information économique suisse

© 2016 Infonet Economy