Search results for " Agglomeration"

Oppida, Agglomerations, and Suburbia: the Bibracte Environs and New Perspectives on Late Iron Age Urbanism in Central-eastern France

2013

This paper explores the nature and chronology of La Tène and early Roman unenclosed agglomerations in central-eastern France. It has been prompted by the discovery of a c. 115 ha La Tène D2b/Augustan (c. 50 BC to AD 15) site close to Bibracte in the Morvan, located around the source of the River Yonne. This complex provides a new perspective on the chronology and role of Late La Tène and early Roman unenclosed settlements, adding further complexity to the story of the development of Late La Tène oppida. It indicates that these ‘agglomerations’ followed remarkably varied chronological trajectories, raising important issues concerning the nature of landscape and social change at the end of th…

The effect of agglomeration economies and geography on the survival of accommodation businesses in Sicily

2021

The study explores the geographical pattern of the accommodation industry in the Italian insular region of Sicily, focusing on the determinants of the risk of market exit. We adopt a standard framework of business survival analysis where agglomeration economies play an important role. We then extend the analysis by considering the role of geography to explore whether the risk of market exit depends on nearness to desirable amenities. The geography is here measured by the distance from the coast and the altitude of the place where the firm is located. When we look at the entire population of accommodation firms that started between 2010 and 2014, we find evidence that the risk of failure inc…

Anatase nanoparticles boundaries resulting from titanium tetrachloride hydrolysis

2017

An important factor that governs solar energy transformation into electrical or chemical energy, when using nanoparticles-based devices, is the spatial location of traps limiting electron transport. Evidences have been presented indicating that the electron diffusion is strongly influenced by nanoparticle boundaries, whose characteristics depend on the particles preparation. In the present work we have studied the role of hydrated excess proton structures in the formation of anatase nanoparticles boundaries in samples prepared by TiCl4 hydrolysis at low temperature and strong acidic conditions. The samples, constituted by anatase nanocrystals but, mainly, by amorphous titania, are studied b…

Optimización de las propiedades de emulsión de betún para la estabilización de balasto

2017

Ballasted track, while providing economical and practical advantages, is associated with high costs and material consumption due to frequent maintenance. More sustainable alternatives to conventional ballasted trackbeds should therefore aim at extending its durability, particularly considering ongoing increases in traffic speed and loads. In this regard, the authors have investigated a solution consisting of bitumen stabilised ballast (BSB), designed to be used for new trackbeds as well as in reinforcing existing ones. This study presents the idea behind the technology and then focuses on a specific part of its development: the optimisation of bitumen emulsion properties and dosage in relat…

Demographic Analysis of Bucharest-Ilfov Region

2013

Abstract This paper aims to achieve a study was to research, analyze and interpret statistical data, in conjunction with theoretical aspects that allowed assessment of regional information on population structure in the Bucharest-Ilfov. Bucharest-Ilfov region's population (2,264,865 inhabitants in 2012) is distributed inversely proportional to the size of two administrative entities (Bucharest - the capital of Romania - Ilfov county). Bucharest is the largest urban agglomeration in Romania, its population being 1,924,299 inhabitants, representing about 85% population of the region, more than 16.4% of the urban population of the country, or around 9% of the total population of Romania and ha…

Evolution of Free Volumes in Polycrystalline BaGa2O4 Ceramics Doped with Eu3+ Ions

2021

H.K. and Y.K. would like to thank A. Ingram for assistance in PAL experiments. The authors thank E.A. Kotomin and M. Brik for the many useful discussions. The research was (partly) performed in the Institute of Solid State Physics, University of Latvia ISSP UL. ISSP UL as the Center of Excellence is supported through the Framework Program for European universities Union Horizon 2020, H2020-WIDESPREAD-01–2016–2017-TeamingPhase2 under Grant Agreement No. 739508, CAMART2 project.

Alcoholic nanolime dispersion obtained by the insolubilisation-precipitation method and its application for the deacidification of ancient paper

2017

Abstract Nanolime dispersions for the deacidification of ancient paper constitute a valid alternative to the lime traditional ones. Their efficacy depends on particles size, polydispersity and agglomeration that can be controlled depending on the preparation method. In this work, nanolime preparation by insolubilisation-precipitation method is reported. Nanoparticles dispersed in a water-isopropanol mixture were obtained without any manipulation of the dispersion. The stability of the dispersion together with particle size and morphology were found to be dependent on water to isopropanol molar ratio and on the synthesis temperature. One of the dispersion was applied on a manuscript to asses…

Researches concerning the construction of ultrasonic gas filters

2018

ENTREPRENEURIAL AND REGIONAL GROWTH ACTIVITY IN FINLAND

2010

Audretsch & Feldman (2004) argue that an agglomeration is a collection of localized firms with a common focus. As firms thrive, resources are attracted to the region. They state that, if entrepreneurship serves as a mechanism for knowledge spillovers, measures of entrepreneurial activity should be linked positively to regional growth performance. In Schumpeterian economics the engine of economic development is entrepreneurial innovation. Creative destruction makes way for new innovations and growth. In this study, we simultaneously examine the regional entrepreneurial activity and regional growth activity in Finland. A further aim of the study was to find out if entrepreneurial activit…

DETERMINANTS OF EDUCATIONAL ADVANCEMENT OF RURAL AREAS IN POLAND

2017

The article is an aimed attempt at the diagnosis and evaluation of the educational level (character) of rural population in Poland perceived as educational advancement as well as of its environment (background). Growing importance of education in improving professional opportunities, changing educational aspirations and parents’ support as well as positive internal migration trends were emphasised. Rural regions are still lagging behind urban areas, though optimistic characteristics indicate receding stigmatisation and marginalisation of the Polish country with internal migration of young and educated individuals, including affluent ones (potential luxury goods buyers), to rural area…