7,959 research outputs found

    Relevance of Social, Economic, and Environmental Impacts on Residents’ Satisfaction with the Public Administration of Tourism

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    Those in charge of tourism destinations face the need to create tourism development models compatible with the essence of the localities that they manage. These models have to be sustainable, both environmentally and socially, and also must become drivers of the local economy. However, tourists also generate negative impacts in the locality which, when they are perceived by the residents, can give rise to a rejection of visitors. Hence, improving the tourism management is necessary. This is why to know the residents’ perceptions about the impacts of tourism is essential. Moreover, measuring the impact effects on their satisfaction with the public administration of the destination can be of great usefulness. This study falls into this research line, as it proposes a model to measure these impacts and their effect on satisfaction. To do so, an empirical study is performed among residents in the city of Seville (southern Spain, one of the most visited destinations in the world), based on subjective economic, social, and environmental indicators. The results show that the citizens value three types of impacts, the social impact coming after the economic impact as to its influence on their satisfaction with the administration. Based on this, we postulate that the efforts made to attract events to the city, or to improve connections to access a broader market, must be approached as public procurements in which selection criteria that are compatible with the destination’s positioning and strategy prevail. Social and environmental criteria should be considered among these criteria

    Static locality analysis for cache management

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    Most memory references in numerical codes correspond to array references whose indices are affine functions of surrounding loop indices. These array references follow a regular predictable memory pattern that can be analysed at compile time. This analysis can provide valuable information like the locality exhibited by the program, which can be used to implement more intelligent caching strategy. In this paper we propose a static locality analysis oriented to the management of data caches. We show that previous proposals on locality analysis are not appropriate when the proposals have a high conflict miss ratio. This paper examines those proposals by introducing a compile-time interference analysis that significantly improve the performance of them. We first show how this analysis can be used to characterize the dynamic locality properties of numerical codes. This evaluation show for instance that a large percentage of references exhibit any type of locality. This motivates the use of a dual data cache, which has a module specialized to exploit temporal locality, and a selective cache respectively. Then, the performance provided by these two cache organizations is evaluated. In both organizations, the static locality analysis is responsible for tagging each memory instruction accordingly to the particular type(s) of locality that it exhibits.Peer ReviewedPostprint (published version

    Abrupt climate changes of the last deglaciation detected in a Western Mediterranean forest record

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    Abrupt changes in Western Mediterranean climate during the last deglaciation (20 to 6 cal ka BP) are detected in marine core MD95-2043 (Alboran Sea) through the investigation of high-resolution pollen data and pollen-based climate reconstructions by the modern analogue technique (MAT) for annual precipitation (Pann) and mean temperatures of the coldest and warmest months (MTCO and MTWA). Changes in temperate Mediterranean forest development and composition and MAT reconstructions indicate major climatic shifts with parallel temperature and precipitation changes at the onsets of Heinrich stadial 1 (equivalent to the Oldest Dryas), the Bölling-Allerød (BA), and the Younger Dryas (YD). Multi-centennial-scale oscillations in forest development occurred throughout the BA, YD, and early Holocene. Shifts in vegetation composition and (Pann reconstructions indicate that forest declines occurred during dry, and generally cool, episodes centred at 14.0, 13.3, 12.9, 11.8, 10.7, 10.1, 9.2, 8.3 and 7.4 cal ka BP. The forest record also suggests multiple, low-amplitude Preboreal (PB) climate oscillations, and a marked increase in moisture availability for forest development at the end of the PB at 10.6 cal ka BP. Dry atmospheric conditions in the Western Mediterranean occurred in phase with Lateglacial events of high-latitude cooling including GI-1d (Older Dryas), GI-1b (Intra-Allerød Cold Period) and GS-1 (YD), and during Holocene events associated with high-latitude cooling, meltwater pulses and N. Atlantic ice-rafting. A possible climatic mechanism for the recurrence of dry intervals and an opposed regional precipitation pattern with respect to Western-central Europe relates to the dynamics of the westerlies and the prevalence of atmospheric blocking highs. Comparison of radiocarbon and ice-core ages for well-defined climatic transitions in the forest record suggests possible enhancement of marine reservoir ages in the Alboran Sea by 200 years (surface water age 600 years) during the Lateglacial

    Diversification decisions among family firms: the role of family involvement and generational stage

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    While prior literature has focused on whether family firms are more or less inclined to diversification than non-family firms, the examination of differences in diversification among family firms has received much less attention. We analyze how family involvement (in ownership, control, and management) and the generational stage in the company (first versus later generations) influence diversification among family firms. The empirical evidence is provided by a sample of publicly listed family firms from the EU. Our results show that larger levels of family involvement in the firm are associated with lower diversification. Furthermore, first-generation family firms are found to be less diversified than their later-generation counterparts

    Multi-Sensor System For Level Measurements With Optical Fibres

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    A system for measuring liquid level in multiple tanks using optical fibre technology has been developed. The oil field service industry can benefit from this intrinsically safe technology. Plastic optical fibre (POF) sensor heads are excited by a 650 nm laser. Laser diodes are housed in ST connectors to obtain compact and rough prototypes and these connectors are also used in the fibre pigtails. Optical multiplexing is used to increase the measuring safety area. POF splitters and connectors are used to combine all the receiving sensor head fibres in a single one. Frequency division multiplexing is used to address each sensor head. The global system is controlled through a user friendly software application running in a PC connected to the system via an RS-232 port. A scalable prototype with a range greater than 2 meter, good linearity, better than 1.5% FS (full scale), high accuracy and resolution is developed using a unique lens to collimate and focus the light. Measurements are taken to validate the designs. Up to 8 sensor heads can be connected in the present implementation. But a greater number of sensors can be allocated with minor modifications in the electronics.Universidad Carlos III de MadridPublicad

    Europe 2020 strategy: a strategy for which type of growth?

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    This paper constructs an index that synthesizes the eight targets of the EU 2020 Strategy into a one-dimensional target –EU 2020 synthetic target- and the situation of each EU28 Member States (the current 27 Members plus Croatia) in 2011 with respect to them –2011 synthetic situation-. Hence we can measure the distance of each EU Member State synthetic situation in 2011 to the EU 2020 synthetic target. We find that none of the Member States meets the EU 2020 synthetic target, Denmark is the closest and Malta is the furthest to it. In fact we could identify clusters of Member States in terms of the distances to the EU 2020 synthetic target: the North EU region is closer to and the Mediterranean region is further away from it. We extent the distance analysis above by adding three inequality targets -income distribution, female employment and child poverty- and find that all of the Member States increase their distance between their 2011 synthetic inequality-extended situation and the 2020 inequality-extended targeted situation. Finally, we want to analyse each Member State’s relationship between its objective position regarding the EU 2020 synthetic target and its life satisfaction level, inhabitants’ subjective position. Through a multivariate regression methodology, we analyse how much of the total effect of the synthetic index on life satisfaction is direct, and how much is mediated. The mediation analysis shows that a substantial part of the effect of the synthetic index on life satisfaction is mediated by the GDP per capita. These results are in line with recent views in human development and well-being research. That is, the GDP per capita is only a means to achieve socioeconomic progress, not the end

    A dual role for the βPS integrin myospheroid in mediating Drosophila embryonic macrophage migration

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    This is an Open Access article distributed under the terms of the Creative Commons Attribution License.-- et al.Throughout embryonic development, macrophages not only act as the first line of defence against infection but also help to sculpt organs and tissues of the embryo by removing dead cells and secreting extracellular matrix components. Key to their function is the ability of embryonic macrophages to migrate and disperse throughout the embryo. Despite these important developmental functions, little is known about the molecular mechanisms underlying embryonic macrophage migration in vivo. Integrins are key regulators of many of the adult macrophage responses, but their role in embryonic macrophages remains poorly characterized. Here, we have used Drosophila macrophages (haemocytes) as a model system to address the role of integrins during embryonic macrophage dispersal in vivo. We show that the main βPS integrin, myospheroid, affects haemocyte migration in two ways; by shaping the three-dimensional environment in which haemocytes migrate and by regulating the migration of haemocytes themselves. Live imaging revealed a requirement for myospheroid within haemocytes to coordinate the microtubule and actin dynamics, and to enable haemocyte developmental dispersal, contact repulsion and inflammatory migration towards wounds.This work was supported by the Spanish Ministerio de Ciencia y Tecnología [grant numbers BFU2010-16669 and CSD-2007-00008 to M.D.M.-B.] and by a Wellcome Trust Senior Research Fellowship [grant number 090899/Z/09/Z to W.W.]. R.R. was supported by the DFG as project B11 of the SFB 446 ‘Zellverhalten der Eukaryoten’]; the EMBO Young Investigator Programme [a Formación de. Personal Investigador studentship from the Spanish Ministerio de Ciencia y Tecnología [to B.J.S.-S.]. and an MRC Doctoral Training Grant to K.C.Peer reviewe

    Competencia financiera y modelación matemática en bachillerato: un acercamiento cualitativo desde la investigación basada en diseño (DBR)

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    La competencia matemática se articula como un conjunto de habilidades y capacidades que van permitir a los individuos analizar, resolver e interpretar problemas matemáticos en diferentes situaciones, y su importancia para mejorar el bienestar de los ciudadanos se recoge en informes como PISA o leyes como la LOMCE. El estudio del proceso de adquisición de la competencia financiera al trabajar dicha competencia con las competencias matemática y de modelación, es uno de los objetivos centrales de nuestra investigación, que se desarrolla en un contexto de enseñanza de Economía en Bachillerato

    Forest Ecosystem Services: An Analysis of Worldwide Research

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    The relevance of forests to sustain human well-being and the serious threats they face have led to a notable increase of research works on forest ecosystem services during the last few years. This paper analyses the worldwide research dynamics on forest ecosystem services in the period from 1998 to 2017. A bibliometric analysis of 4284 articles was conducted. The results showed that the number of published research articles has especially increased during the last five years. In total, 68.63% of the articles were published in this period. This research line experiences a growing trend superior to the general publishing trend on forest research. In spite of this increase, its relative significance within the forest research is still limited. The most productive subject areas corresponded to Environmental Science, Agricultural and Biological Sciences and Social Sciences Economic topics are understudied. The scientific production is published in a wide range of journals. The three first publishing countries are United States, China and the United Kingdom. The most productive authors are attached to diverse research centres and their contributions are relatively recent. A high level of international cooperation has been observed between countries, institutions and authors. The findings of this study are useful for researchers since they give them an overview of the worldwide research trends on forest ecosystem services
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