Element partitioning and potential mobility within surface dusts on buildings in a polluted urban environment, Budapest.

A voluminous literature exists on the analysis of water-soluble ions extracted from gypsum crusts and patinas formed on building surfaces. However, less data is available on the intermediate dust layer and the important role its complex matrix and constituents play in crust/patina formation. To address this issue, surface dust samples were collected from two buildings in the city of Budapest. Substrate properties, different pollution levels and environmental variations were considered by collecting samples from a city centre granite building exposed to intense traffic conditions and from an oolitic limestone church situated in a pedestrian area outside and high above the main pollution zone. Selective extraction examines both water-soluble ions (Ca2+, Mg2+, Na+, K+, Cl-, NO3- SO42-) and selected elements (Fe, Mn, Zn, Cu, Cr, Pb, Ni) from the water-soluble, exchangeable/carbonate, amorphous Mn, amorphous Fe/Mn, crystalline Fe/Mn, organic and residual phases, their mobility and potential to catalyse heterogeneous surface reactions. Salt weathering processes are highlighted by high concentrations of water-soluble Ca2+, Na+, Cl- and SO42-- at both sites. Manganese, Zn and Cu and to a lesser extent Pb and Ni, are very mobile in the city centre dust, where 30%, 54%, 38%, 11% and 11% of their totals are bound by the water-soluble phase, respectively. Church dust shows a sharp contrast for Mn, Zn, Cu and Pb with only 3%, 1%, 12% and 3% of their totals being bound by the water-soluble phase respectively. This may be due to (a) different environmental conditions at the church e.g. lower humidity (b) continuous replenishment of salts under intensive city centre traffic conditions (c) enrichment in oxidisable organic carbon by a factor of 4.5 and a tenfold increase in acidity in the city centre dust.

Industrial Restructuring in the Budapest agglomeration

The major 'motor' of the recent Hungarian industrial development has been foreign direct investment, particularly by multinational companies. This has stimulated the development process, as shown by the dynamism of production, exports and profitability of industry in Budapest. On the other hand, this has also led to a split of the industrial sphere into its foreign and domestic sections, or into foreign-owned companies and domestic SMEs. The major question asked in this project is where is Hungarian industry heading and will the gap between the contracting domestic part and the foreign multinationals continue to widen or will they be joined in a much more favourable scenario. Barta sees this as a question of whether Hungary can avoid the 'dead-end street' of South Asian industrialising countries, and instead move towards a new Eastern European or Hungarian model. He concludes that Budapest industry does not follow any given model and indeed its development probably cannot be seen as a 'model' proper in itself, but is, or will be, a mixture of different elements. This would be a welcome fusion of Hungary's rich human resources of accumulated knowledge with foreign direct investment. Budapest would play an exceptional role in such a process, as the gateway for foreign output to the rest of the country. The share of industry in the Budapest economy will continue to decrease, but it will become a more modern and profitable sector. It will also fulfil a technological transfer role between the developed world and the Hungarian countryside (or even a larger region of central and eastern Europe). Barta predicts that Budapest industry will develop a special structure, with a large subcontractor network supporting the large foreign enterprises, and alongside this industrial districts formed by SMEs.

Estimating the Size of the Homeless Population in Budapest

Since 1990, the issue of homelessness has become increasingly important in Hungary as a result of economic and structural changes. Various suggestions as to how the problem may be solved have always been preceded by the question "How many homeless people are there?" and there is still no official consensus as to the answer. Counting of the homeless is particularly difficult because of the bias in the initial sampling frame due to two factors that characterise this population: the definition of homelessness, and its 'hidden' nature. David aimed to estimate the size of the homeless population of Budapest by using two non-standard sampling methods: snowball sampling and the capture-recapture method. Her calculations are based on three data sets: one snowball data set and two independent list data sets. These estimators, supported by other statistical data, suggest that in 1999 there were about 8000-10000 homeless people in Budapest.