Search results for " agglomeration"
showing 10 items of 69 documents
COMMUTING PATTERNS IN RIGA AGGLOMERATION: EVIDENCE FROM A SURVEY ANALYSIS OF YOUTH
2021
In the last ten years the evident changes of settlement patterns through suburban growth near to capital city of Latvia occurred. Increase of distance between home and routine activity places as well as changes of public transport and rapid increase of car ownership initiated significant changes in commuting patterns of inhabitants living outside of Riga. Although the commuting from suburban area to Riga is recently broadly studied, however these researches focused primarily on able-bodied population leaving behind school-age children and young people. The aim of this study is to analyse commuting patterns of young people aged 12 to 17 moving from outskirts of Riga to school located in Riga…
Trayectorias Económicas de las Regiones Españolas en un Escenario Post-crisis: Efectos de Vecindad, Especialización y Aglomeración.
2019
Over the last decade, the Spanish regions have undergone deep economic transformations that have gone hand in hand with changes in the production model. After the bursting of the housing bubble, growth has resumed through a recovery of the international competitiveness and a reorientation towards the foreign market. This new model has a clear territorial dimension visible in terms of unequal regional growth showing specific patterns and driving to a new territorial configuration. In order to define this nee configuration, we shall apply a spatial shift-share analysis to the Spanish regions for the periods 2008-13 (recession) and 2013-17 (recovery) aiming to split growth into its composing e…
Connecting Existing Cemeteries Saving Good Soils (for Livings)
2019
Background: Urban sprawl consumes and degrades productive soils worldwide. Fast and safe decomposition of corpses requires high-quality functional soils, and land use which competes with both agriculture and buildings. On one hand, cremation does not require much land, but it has a high energy footprint, produces atmospheric pollution, and is unacceptable to some religious communities. On the other hand, as exhumations are not practiced, “green burials” require more surface area than current burial practices, so a new paradigm for managing land use is required. Conclusions: In this paper, we propose a concept for ‘green belt communalities’ (i.e., ecological corridors with multiple, yet flex…
Economic feasibility study for intensive and extensive wastewater treatment considering greenhouse gases emissions
2013
Economic feasibility assessments represent a key issue for selecting which wastewater treatment processes should be implemented. The few applications that exist focus on the positive economic value of externalities, overlooking the existence of negative externalities. However, wastewater treatment plants (WWTPs) consume a significant amount of energy, contributing to climate change. In this context, as a pioneering approach, greenhouse gas emissions (GHG) have been incorporated as a negative externality of wastewater treatment. Within this framework, this study aims to compare the economic feasibility of five technologies, both intensive and extensive, for small communities. The results sho…
Nano composite membrane-electrode assembly formation for fuel cell-modeling aspects
2007
Long term stability is an essential requirement for fuel cell applications in automobile and stationary energy systems. In these systems the agglomeration of the catalyst nanoparticles is a well-known phenomenon which cannot be easily overcome or compensated for by re-designing the system. A direct result of this occurrence is the irreversible decrease of the electrochemical performance. Irregularities in electric field distribution are one root cause for migration and subsequent agglomeration of the catalyst nanoparticle. In this work, the impact of the electrode mechanical deformation on electric field distribution was studied using a computer modeling approach. Model of a Proton Exchange…
Changes of Commuting Range in Riga Agglomeration
2018
Abstract The aim of this paper is to characterise commuting trends in Riga agglomeration, while taking into account proximity to Riga and territorial accessibility. Changes of commuting range are looked at through literature analysis (historical context) and by using descriptive analysis and parametric tests (current situation). Results indicate that while both proximity to Riga and access to state level roads have a significant impact on commuting flows, it is the former which has a more significant impact.
Population Growth and Manufacturing Real Wages in 18th Century England: A Spatial Perspective
2004
We develop a two-region population growth model of economic geography and show that a process of urbanization has a substantial impact on the evolution of manufacturing real wages. Whereas real wages decline as the population increases when the spatial structure of the economy is fixed, they actually rise in the long-run when factors are mobile. Agglomeration may hence be seen as a rational response to declining real wages and provides a new explanation of why manufacturing real wages did not decline prior to the Industrial Revolution in England, despite a historically unprecedented population growth.
L’habitat perché du Malpas à Soyons (Ardèche) durant l’Antiquité tardive : état des données
2023
International audience; Recent excavations carried out between 2011-2016 in the ancient and medieval town of Soyons (Ardèche), located in the middle Rhône valley, in the territory of the roman colony of Valence, provide us new data on the occupation of the hilltop of Le Malpas.The study of the fortification of the Iron age has revealed the existence of a rampart built during the 3rd century AD. At this time, the lower city, under the actual village, is gradually abandoned. After a probable hiatus during the 4th century AD, the hilltop and the lower city grew again during the 5th and the 6th century AD. The late antique artefacts discovered in all the trenches dug on the Malpas let us assume…
Neoclassical growth, manufacturing agglomeration, and terms of trade
2007
This paper presents an integrated view of economic growth, development traps, and economic geography. We explain why there is income convergence among some countries (neoclassical regime) and income divergence among others (poverty trap regime). Income convergence (divergence) and manufacturing industry diffusion (agglomeration) are re-enforcing each other in a cumulative process. Moreover, trade openness may trigger a catch-up process of an economy that is stuck in a \"poverty trap\". This catch-up is characterized by an increase in the investment-to-GDP ratio and an improvement of the terms of trade. A new dynamic welfare gain of trade liberalization is identified, which is likely to be l…
Air gasification of wood chips, wood pellets and grass pellets in a bubbling fluidized bed reactor
2021
Abstract Gasification is an attractive method for biomass-to-energy conversion and fluidized bed design is one of the best options for large scale operation. A bubbling fluidized bed reactor was used to analyze the effects of biomass type, equivalence ratio (ER) and temperature for product gas compositions. Wood chips, wood pellets and grass pellets were gasified between 650 °C and 800 °C temperature. The ER was varied between 0.08 and 0.16. Gasification of grass pellets was difficult at 800 °C due to agglomeration and the gas composition was poor compared to wood. The reactor performances improved over the temperature and 650 °C was not sufficient to achieve a reasonable carbon conversion.…