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Andrzej Cieślik

Integrated Avionics Systems - Diagnostic Tools and Data Transmission Standards

The paper has been intended to present research tools used at AFIT to activate and test hardware and software implemented in the integrated avionics systems. Particular attention has been paid to the research stand (built under the R&D project of the Ministry of Science and Higher Education) intended to optimize avionics systems integrated with digital data buses employed (according to, among other things, MIL-STD-1553B and ARINC-429 standards). Specialized research equipment/test devices used to test software, including - apart from other things - test-patterns generators (within the range of display capability of the secondary head-up display (SHUD)) and information efficiency testers (for the SHUD and up-front control panel (UFCP) thereof) have also been presented.

Open access

Sławomir Michalak, Andrzej Szelmanowski and Andrzej Cieślik

Methods of Checking the Reliability of Software Applications in the Avionic Systems Integrated Along the Digital Databus MIL-1553B

This The paper presents results of research that was carried out in the Air Force Institute of Technology (ITWL) with respect to test whether information in the avionic systems integrated along the digital databus MIL-1553B is processed correctly. The second part goes into details related to methods that are used in the ITWL to test the MIL-1553B databus on the stages when start up and validation of an integrated avionic system are carried out, in particular those that were applied for upgrading of aircrafts operated by the Air Forces of the Republic of Poland.

Open access

Andrzej Cieślik and Tao Song

Abstract

This article studies the impact of ASEA N on the bilateral exports of its 10 member countries. It reports the results of applying the gravity model to a data set covering 50 partner countries from 1967 to 2008. The study’s empirical findings show that on average ASEA N regionalism significantly increases bilateral exports. However, the results are country-specific and indicate that ASEA N seems to benefit only large economies with a long history of membership, while smaller more recent members do not show significant expansion of exports.

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Andrzej Cieślik, Jan Michałek and Anna Michałek

Abstract

The main goal of this paper is to investigate empirically whether the adoption of the common currency increases the export activity of individual frms using the probity model. There are many studies that seek to estimate the aggregate trade effects of the adoption of the euro by the “outside” EU countries, which are based on the gravity model. In contrast to the existing literature we use an alternative micro econometric approach based on firm level data compiled by the EBRD and the World Bank. We demonstrate that the propensity to export of individual frms from Slovenia and Slovakia increased after the accession of those countries to the Eurozone.

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Andrzej Cieślik and Jan Teresiński

Abstract

In this paper we study Zipf’s law, which postulates that the product of a city’s population and its rank (the number of cities with a larger or equal population) is constant for every city in a given region. We show that the empirical literature indicates that the law may not always hold, although its general form, the rank-size rule, could be a good first approximation of city size distribution. We perform our own empirical analysis of the distribution of the population of Polish cities on the largest possible sample to find that Zipf’s law is rejected for Poland as the city sizes are less evenly distributed than it predicts.

Open access

Andrzej Cieślik and Mahdi Ghodsi

Abstract

In this paper we revisit the existing empirical evidence on the effects of various agglomeration externalities and the market structure on employment growth in the high-tech industries of the European Economic Area (EEA). Our study is based on the dynamic panel dataset of two-digit NACE rev 1.1. industries in 285 regions of the European Economic Area for the period 1995-2007. We find that employment growth is negatively related to competition, while localization and urbanization externalities do not seem to affect growth.

Open access

Tinatin Akhvlediani and Andrzej Cieślik

Abstract

The paper examines the effects of intra- and inter-regional knowledge spillovers on innovative activities in German states using the augmented Griliches-Jaffe knowledge production function. The “Harris market potential” type index is calculated to proxy for inter-regional knowledge transfers of two types: industrial knowledge transfers generated from the business enterprise sector and academic spillovers generated from universities across all German states. The model also includes the concentration of high-tech enterprises, in order to capture the agglomeration effect in the local economy. The estimation results reveal that not only do local private and university research efforts have a positive and significant effect on local innovative activities, but there are also important interregional knowledge spillovers across the German regions.

Open access

Zbigniew Burtan, Andrzej Zorychta, Jerzy Cieślik and Dariusz Chlebowski

Abstract

This article concerns numerical modeling of the impact of mining operations on fault behavior, carried out on the basis of a calculation program based on the finite element method. The calculations and their graphic results related to the reactions of vertical discontinuity on the mining operations that run along its boundary under changing operating parameters, such as geometry of the field and direction of mining with respect to the fault, as well as the method of liquidation of the caving zone. The behavior of the fault was analyzed based on distributions in the plane of shear stress and slip, together with their range and energy dissipated due to friction. The results of numerical calculations made it possible to draw conclusions on the impact of faults and the impact of operating conditions of mining in their vicinity on the level of seismic hazard.

Open access

Dariusz Boguszewski, Monika (Cieślik), Jakub Adamczyk and Andrzej Ochal

The Role of Pilates and Aquafitness Exercises in Sustaining the Health and Fitness of Elderly Women

Background: The aim of this study was an evaluation of the effectiveness of two forms of physical activity: Pilates and aquafitness - gymnastics in water, in sustaining the health and fitness of women after the age of 55. Material and methods: In research groups were twenty five volunteer women - participants of physical training of the age from 55 to 76 years. One of the groups (Group 1) conducted exercise according to the Pilates method, and the second group (Group 2) practiced in water - aquafitness. The exercises took place once a week, 1.5 hours each. The research ("up and go" test, test for strength and endurance of lower limbs, test for strength of upper limbs, test for suppleness of the lower body part) has been conducted twice - in the first four weeks of training and after ten weeks. Results: The strength of upper limbs considerably increased (p=0.038) in the case of women practicing in water. The program of aquafitness contains a lot of resistance exercises for the upper limbs, which had impact on the above mentioned result. Improvement in the results of tests of suppleness of lower body part was observed (after an 10-week cycle of exercises) in Pilates groups. Conclusions: Pilates and aquafitness were beneficial for the level of suppleness of seniors. The frequency of exercises - once a week - is insufficient for sustaining full fitness, however, even such minimal doze of physical activity positively affects the physical and mental condition of the seniors.

Open access

Andrzej Cieślik, Jan Jakub Michałek and Iryna Nasadiuk

Abstract

This paper studies the determinants of the total factor productivity (TFP) for Ukrainian firms in the manufacturing sector across macro-regions using recent micro-level datasets for 2013. Our empirical results show some degree of heterogeneity across Ukrainian macro-regions; in particular, the link between the total factor productivity, firm size, imports and the level of competition seems to be valid for all macro regions. However, the effects of private ownership status, capital intensity and exports seems to be region specific. In addition, we found no relationship between firm productivity and foreign ownership for any of the regions.