The spatial development of multiplant enterprises is characterized by expansion and contraction. Contraction, i.e. the closure of branch plants, in four industries is examined on the basis of material from SW Germany, Switzerland and N Italy. Several periods of varying intensity are identified. The relative location of closed plants to the main plant is measured. Factors behind the closures and their spatial effects are discussed. The topics are elucidated as an aggregate, by region and by industry.
En este ensayo se examinan tres ejemplos de regiones fronterizas: 1) Baden-Alsacia (el norte de Suiza-el norte de Italia); 2) el caso de la zona fronteriza de Río Grande, Estados Unidos, y México; así como 3) el ejemplo de los países del Pacto Andino con especial consideración de Estados Unidos. En la explicación de la estructura y desarrollo de los sistemas industriales en las regiones fronterizas deben considerarse los factores históricos, la política geográfica y el desarrollo regional, en la misma medida en que se consideran los procesos de la economía de "plantas sucursales", de la expansión y movilidad de determinados grupos industriales, sin dejar a un lado los factores de localización industrial. Es de vital importancia conocer de qué tipo de frontera se trata y la fuerza con que ejerce su influencia sobre regiones con diferente grado de desarrollo.
The main aim of the work is to assess physical parameters of forest woodchips and their impact on the prices achieved by the supplier in transactions with a power plant. During fragmentation of logging residue, high content of green matter and contaminants negatively impacts the quality parameters that serve as basis for settlements. The analysis concerns data on the main parameters -water content, fuel value, sulphur and ash content -from 252 days of deliveries of forest chips to a power plant. The deliveries were realised from forested areas on an average about 340 km from the plant. Average water content and the resultant fuel value of forest chips was within 27-47% and 8.7-12.9 GJ×Mg −1 (appropriately), respectively. They depend on the month in which they are delivered to the power plant. The threshold values for the above-mentioned parameters are set by the plant at a real level and the suppliers have no problems with meeting them. The parameter that is most frequently exceeded is ash content (11.5% of cases). The settlement system does not differentiate on the basis of the transport distance but gives possibility to lower the settlement price when the quality parameters are not met but provides no reward for deliveries with parameters better than the average ones. On the basis of results obtained, it was calculated that average annual settlement price is lower than the contract price by about 0.20 PLN×GJ −1 , which in case of the analysed company may translate into an average daily loss of about 700 PLN.
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