Wyniki wyszukiwania - Biblioteka Nauki

1

Solving a large heterogeneous-agent general equilibrium model with labour market frictions

100%

Antosiewicz M.

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tom Vol. 45, no. 4

513--523

EN

In this paper we build and solve a heterogeneous-agent dynamic stochastic general equilibrium (DSGE) model with incomplete markets in the spirit of Krussel and Smith (1998). We expand this model to account for search and matching labour market frictions, using the classic Mortensen and Pissarides (1994) framework. The model, therefore, combines two important strands of economic modelling and presents a numerical challenge in terms of solving the model due to the inclusion of additional dimensions in the optimization problem. Despite the addition of additional state variables and higher dimensionality, we show that we are able to eﬃciently solve it numerically using value function iteration and we document basic properties of the model.

2

GPS w Małopolsce

100%

Antosiewicz M.

Geodeta : magazyn geoinformacyjny

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2007

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tom nr 5

16-20

3

Doświadczenia w udostępnianiu danych przestrzennych dla Centrum Pawiadamiania Ratunkowego TOPR/GOPR

63%

Antosiewicz M. , Podlasek S.

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2006

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tom T. 4, z. 1

121-126

EN

Recently, there is growing interest in geoinformation, which allows for coordination and support of the activities of rescue services. In order to precisely determine the needs in the area of crisis management in the Małopolskie Voivodeship several consultations were held with the rescue services involved. According to the collected data, the most important for rescue teams application of geoinformation is to define exact localization of the event, monitoring and navigation of the groups operating in the area, to specify available resources and technical means and to determine technical infrastructure of the object and other elements which could be a potential threat to health and life. When analysing gathered data it is possible to determine the range of spatial information, which enables coordination and support of rescue services. This range includes topographic and thematic database with selected information range, with the level of detail corresponding to maps at scales 1:10 000 and 1: 50 000, and even larger for water-pipes, gas pipes and power grid. At present, geodetic resources of Voivodship do notcontain data meeting all expectations of rescue services. The Voivodeship only has complete spatial databases with the level of details corresponding to maps in the scale 1: 50 000 such as VMAP Level2 and computer-based atlas of Małopolskie Voivodeship and thematic products: sozologic and hydrographic database. A complementary product is orthophotomap from 2002.2003, in scale 1 : 5000. The activities planned by Malopolskie Voivodeship for the coming years should gradually improve the situation. These activities include: m making of the Topographical Database (level of detail 1:10 000) for the whole Voivodeship with the most important information layers, m participation in the project .Methodology and procedures of integration, visualization, generalization and standardization reference database available in geodetic and cartographic resources and their use to create thematic database., m building and implementing a pilot monitoring system for TOPR (Tatra Voluntee Rescur Service) cooperation with rescue services in monitoring and control systems which use GPS.

4

Choice of best possible metaheuristic algorithm for the travelling salesman problem with limited computational time: quality, uncertainty and speed

51%

Antosiewicz M. , Koloch G. , Kamiński B.

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tom Vol. 7, nr 1

46--55

EN

We compare six metaheuristic optimization algorithms applied to solving the travelling salesman problem. We focus on three classical approaches: genetic algorithms, simulated annealing and tabu search, and compare them with three recently developed ones: quantum annealing, particle swarm optimization and harmony search. On top of that we compare all results with those obtained with a greedy 2-opt interchange algorithm. We are interested in short-term performance of the algorithms and use three criteria to evaluate them: solution quality, standard deviation of results and time needed to reach the optimum. Following the results from simulation experiments we conclude that simulated annealing and tabu search outperform newly developed approaches in short simulation runs with respect to all three criteria. Simulated annealing finds best solutions, yet tabu search has lower variance of results and converges faster.

5

Powierzchniowy RTK/DGPS

51%

Kudła J. , Antosiewicz M. , Świątek A. , Jaworska L.

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tom nr 9

16--18

6

Phenotypic and genotypic antimicrobial resistance of staphylococci from bovine milk

32%

Kot B. , Piechota M. , Wolska K. M. , Frankowska A. , Zdunek E. , Binek T. , Klopotowska E. , Antosiewicz M.

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nr 4

EN

The aim of this study was to examine phenotypic and genotypic antimicrobial resistance of staphylococci from milk samples from cows with subclinical and clinical mastitis and from cows without mastitis symptoms to methicillin, tetracyclines, macrolides and lincosamides (ML). Of 207 strains, including 34 S. aureus and 173 coagulase-negative staphylococci (CNS), 11 (6.4%) CNS strains were phenotypically resistant to methicillin. The mecA gene was detected by PCR only in two S. xylosus strains and one strain of S. epidermidis and S. simulans. No methicillin-resistant S. aureus strains were observed. In methicillin-resistant strains with mecA, gene resistance to other investigated antibiotics was not observed. Phenotypic resistance to tetracycline was detected in 11.0% of CNS strains and 47.4% of them carried the tetK gene. Of 173 CNS strains studied, 27 (15.6%) were resistant to at least one ML antibiotic. The resistance gene ermC was detected in 55.5% of the 27 ML-resistant strains. The ermA and ermB genes were detected in 14.8% and 11.1% of ML-resistant CNS strains, respectively. Antimicrobial resistance to methicillin, tetracyclines and macrolides was detected more frequently in staphylococcal strains from clinical mastitis compared to animals with subclinical symptoms and without mastitis, while the resistance to lincosamides showed a similar frequency in all groups of cows. In conclusion, CNS species from bovine milk differ in phenotypic and genotypic antimicrobial resistance profiles, and the use of PCR technique alone for the detection of methicillin, macrolide, lincosamide and tetyracycline resistance in CNS from cattle is not reliable.