1,322 research outputs found
Secondary resonances of co-orbital motions
The size distribution of the stability region around the Lagrangian point L4
is investigated in the elliptic restricted three-body problem as the function
of the mass parameter and the orbital eccentricity of the primaries. It is
shown that there are minimum zones in the size distribution of the stability
regions, and these zones are connected with secondary resonances between the
frequencies of librational motions around L4. The results can be applied to
hypothetical Trojan planets for predicting values of the mass parameter and the
eccentricity for which such objects can be expected or their existence is less
probable.Comment: 9 pages, 7 figures, accepted for publication in MNRA
Characters of vertically integrated cooperatives and their retail activities in Denmark
In 2000 based on the amalgamation of MD Foods in Denmark and ARLA in Sweden the ARLA Foods Danish –
Swedish cooperative became the biggest common dairy production, manufacturing and marketing co-operative
in the European Union, which has very considerable important experience for the Hungarian supply chain
management in food industry. From both of them share of Sweden was more by 2% than Denmark’s one,
namely 29% in 2000, which decreased to the level of 26,4% in 2001. Opposit to this data, share of Denmark in
turnover of ARLA Foods cooperative was 24%, which mostly did not change.
The ARLFA Foods cooperative plays important role in Denmark, because this is the first cooperative in
Denmark and Sweden. Mostly the most important cooperatives concern food production additionally to dairy
products, for example meat, fruit, vegetables, feed, fur, grass seeds and egg
The study analyses modelling system for vertically integrated product channel by through this cooperative,
which has dairy producing – manufacturing factories in 13 countries, trading subsidiarities in 20 countries with
16 thousands employees during the first decade of 2000s. This cooperative is working as a large transnational
corporation with managing extra large production capacity based on the market strategy.
Total turnover of cheese, butter and conserved dairy products reached 52-53 % by the end of 2000s, which show
that, more than half of value of turnover belonging to the ARLA Foods has been covered by considerably value
added or highly manufactured products in this decade. Recently by the end of 2010 Denmark exports its food
industrial products to 150 countries of the world economy.
The ARLA Foods faced some issues needed for solving, for example: Quality demands, Food safety, Sustainable
Food Production. The ARLA Foods in order to implement solutions for these issues, created new Marketing
strategy to produce new products and brand, new and environment friendly technology, setting up the Retail
Network in the world economy to extent its turnover
Modelling of heat exchange between drops in suspension polymerization of vinyl chloride
A population balance model is presented for suspension polymerization of vinyl chloride in a batch reactor to investigate the thermal properties of the system. Reactions are described using a simplified reaction model focusing on the heat generation of the highly exothermic polymerization reactions. The temperature of the continuous phase is assumed to be homogeneous over the reactor and the effects of some temperature rise of droplets due to the exothermic polymerization reactions and the possible heat exchange because of the coalescence/redispersion process are analysed. The population balance equation is solved applying a Monte Carlo method by coupling the deterministic polymerization reactions inside the droplets with the discrete event process induced by collisions of droplets.
The results obtained by simulation show that rise in the temperature of droplets over the mean temperature of continuous phase lead to acceleration of the process. The possible size distribution of droplets and no smooth distribution of the initiator in those decrease the process efficiency
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