382 research outputs found

    The psychophysiological regulation of pacing behaviour and performance during prolonged endurance exercise

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    Current models of exercise regulation almost solely rely on the Gestalt phenomenon of perceived exertion. This limits a more comprehensive understanding of how causeeffect relationships come to be and how perception-action coupling determines pacing behaviour and performance fatigability. A three-dimensional framework of centrally regulated and goal-directed exercise behaviour is proposed, which differentiates between sensory-discriminatory, affectivemotivational, and cognitive-evaluative processes hypothesised to underpin perceived fatigability. In short: (A) perceived physical strain and perceived mental strain are primary regulators of pacing behaviour necessary to align planned behaviour with current physiological state, (B) core affect plays a primary and mediatory role in performance regulation, and (C) the mindset- shift associated with an action crisis plays a primary role in volitional self-regulatory control and decision-making. In study one, 23 cyclists of distinct performance levels engaged in 70-km individual and head-to-head competition time trials against a performance matched opponent. Sensory constructs were primarily associated with regulation of pacing behaviour. Affective and cognitive constructs acted as context-dependent modifiers and were primarily associated with regulation of performance. A five-step structural equation modelling procedure was applied to assess the extent to which the observed data fit the hypothesised cause–effect relationships under the constraint of psychological duress: valence deterioration was found to mediate the relationship between falling-behind and action crisis; which in turn predicted increased non-adaptive endocrinological distress response; which in turn predicted performance decrement. In study two, 22 highly-trained runners completed two self-paced 20-km treadmill time trials in a tapered condition and with locomotor muscle fatigue and exercise-induced muscle damage. The latter was associated with medium increases in markers of physiological distress and large alterations in perceived physical strain, affective valence, and cognitive mindset. This indicates heuristic and rational antecedents in the goal-disengagement process. Structural equation modelling confirmed the hypothesised dual-pathway model under the constraint of physical duress: haematological indicators of EIMD predicted (1) amplified physiological strain and non-adaptive endocrinological distress response and (2) increase in perceived physical strain, which mediated and predicted decrease in valence; which in turn predicted an increase in action crisis; and both physiological and perceptual effects predicted performance fatigability. The proposed framework has the potential to enrich theory development in centrally regulated and goal-directed exercise behaviour by providing novel insights into and more complete account of the dynamic and complex processes in strain-perceptionthinking-action coupling during prolonged endurance exercise

    The impact of language borders on the spatial decay of agglomeration and competition spillovers

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    There is now strong evidence that “soft” institutions are interrelated with the working of the economy. For example, in a geographical setting there is evidence that language borders affect interpersonal relationships, but there is no equivalent evidence regarding the effects of language borders on agglomeration or competition spillovers. This paper examines whether language affects the geographical extension of agglomeration and competition spillovers by observing the geography of employment patterns in a linguistically discontinuous setting. Our findings, for the first time, provide empirical evidence that language borders shape the distance decay of competition spillovers, independent of governance, and institutional issues

    Do households prefer to move up or down the urban hierarchy during an economic crisis?

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    In this paper, we investigate the relationship between adverse economic circumstances and the desire of Dutch households to move up or down the urban hierarchy. We apply three consecutive waves of the Dutch Housing Demand Survey (WoON) in a repeated cross-section setting, with data collected at the time of the Global Financial Crisis (GFC) and its aftermath. We find that households desire to move down the urban hierarchy during the volatile and uncertain periods following the GFC. This is a surprising result, given that urban areas are generally considered more opportunity rich. In order to uncover the mechanisms driving this result, we considered the impact of the economic circumstances on the general willingness to move and on the underlying motives. We find that willingness to move increased when the adverse economic consequences of the GFC hit Dutch households. Further, it appears that this willingness to move is only partially related to work. Besides work, desires to move for health, education, vicinity to family and friends, and reasons related to the dwelling, also become more prevalent during the aftermath of the GFC as well. This heterogeneity in impacts and consequences for household desired mobility serves to explain some of the mixed results in the literature, and generates lessons for current and future crises such as the Covid-19 pandemic

    Internal migration in Indonesia:new insights from longitudinal data

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    This study examines the roles of individual and household characteristics in internal migration in Indonesia for the first time using the five waves of Indonesia Family Life Survey. Our analysis extends previous research by using a longer period to capture mobility behaviour, by comparing changing of residence across three spatial scales, by incorporating the interaction of relation to household head and gender, and by differentiating migration involving the interaction of Sumatra, Java, other regions and rural-urban areas. The multinomial logistic regression results are consistent with international observations relating to age, education, marital status, previous migration, dependents, family size, and income. Some unique features from this study are the results which show that the probability of migrating by gender varies according to one’s relation to the household head, which highlights the importance of gender and family structure in migration decision-making. Residents of Java have lower probabilities of migrating, compared to non-Java residents for smaller spatial scale migrations, but are relatively likely to engage in inter-provincial migration. Urban-originating moves are more likely than rural-originating moves for all spatial scales except for Sumatra where its rural residents have a higher probability of migrating inter-provincially than its urban residents

    Aversion to loss of place:The endowment effect for local facilities

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    Facility-decline is often met with community responses including protective behaviour. These reactions to place-change are preceded by the conscious and unconscious valuation of public places as communal assets and subsequent negative evaluation of closure. Previous studies show that closure of local facilities can be perceived as a loss to the community. However, a gap in place-based research in geography and environmental psychology is the lack of attention to psychological biases, such the endowment effect, that could influence in the perceived loss of facilities because people attach more value to something they are used to ‘having’. This paper uses insights from prospect theory as a reference point to theorise the socio-psychological process of dealing with place-change caused by the closure of local facilities. Analysis of a survey conducted in the Province of Fryslân, Netherlands, shows that positive subjective valuation of eight local facilities, as well as negative evaluation of closure, is influenced by the current availability and the social function of this facility in the neighbourhood. The results indicate that the endowment effect exists in the context of facility decline. This paper hopes to ignite a discussion, and to stimulate further research into the effect of psychological biases on place-based behaviour. Moreover, since previous studies show that a perceived sense of ownership and emotional and cognitive bonds can lead to endowment effects in other context, this study paves the way for research into the relationship between collective psychological ownership, place attachment, the endowment effect and overall aversion to loss of place.</p

    Human capital spillovers in Dutch cities:consumption or productivity?

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    We study the recursive relationship between the ability of Dutch cities to attract recent graduate human capital to their labour-or housing markets and a city's skills structure, using a comprehensive dataset and a novel operationalisation strategy. We disentangle production and consumption spillovers by separating out human capital employed in a city's labour market and human capital present in a city's resident population, respectively. We do so for both the recent graduates flowing into Dutch cities to find work and a residential location, as well as for the incumbent workers and population. We control for the effects of a city's skills endowments, its (non-) economic characteristics and those of other relevant cities. We find positive effects of a relatively strong graduate labour market inflow on the share of higher and scientific-level jobs. Production spillovers therefore predominantly occur among the higher skilled. Contrary to the higher educated incumbent population, which appears to prefer high skilled services, recent graduate inflows to residential areas have positive effects on the share of jobs requiring lower and medium skills. Consumption spillovers from graduate residential inflows thus occur between higher and lower skilled

    Challenges of Corn Stover Transportation

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    Stover has the potential to be a very useful byproduct of corn. Corn stover uses: Feedstock for cellulosic ethanol; Fuel source for power plants; Animal bedding. Benefits of corn stover: Inexpensive; Readily available in Iowa. Who can stover benefit? Farmers who can make money by selling stover; Buyers have access to cheap, eco-friendly material
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