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Abstract

The main theme of this paper is to study two important aspects of precise geoid determination using Helrnerts second method of condensation. This work illustrates via numerical investigations the importance of using actual density information of topographical bulk and the effects that different gravimetric reductions have on gravity interpolation in Helmert geoid computational process, in addition to the commonly used Bouguer scheme. A rugged area in the Canadian Rockies bounded by latitude between 49°N and 54°N and longitude between 236°E and 246°E is selected to carry out numerical investigations. The lateral density information is used in all steps of the Helmert geoid computational process. The Bouguer and residual terrain modelling (RTM) topographic reductions, the Rudzki inversion scheme, and the topographic-isostatic reductions of Pratt-Hayford (PH) and Airy-Heiskanen (AH) are used for gravity interpolation. Results show that the density information should be applied in all steps of the Helmert geoid computational process and that the topographic-isostatic gravimetric reduction schemes like the PH or AH models or the RTM reduction, should be applied for smooth gravity interpolation instead of the commonly used Bouguer reduction scheme for precise Helmert geoid determination.
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Authors and Affiliations

Sujan Bajracharya
Michael G. Sideris
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Abstract

Workplaces have become increasingly diverse as a result of migration and other socio-economic changes in Europe. In the light of post-2004 migration, many Polish migrants find themselves in work-places where multiculture is an everyday lived experience. By drawing on narrative interviews conducted with Polish migrant women in Manchester and Barcelona, this paper focuses on the complexities of interaction with other ethnic groups at work, demonstrating various forms of conviviality. The study reveals more and less meaningful forms of contact at work including workplace friendships, light-hearted forms of conviviality characterised by the interplay of language and humour, relations based on care and respect for difference, as well as forced encounters marked by superficial and involuntary interaction. The findings show that while workplace can be a place of meaningful interaction, it can also involve conflict and tensions. The narratives illustrate that workplace relations can be influenced by the dynamics of gender, race, ethnicity, socio-economic circumstances and immigration discourses. The paper contributes analytically and empirically to the understanding of different forms of encounters in the workplace.

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Authors and Affiliations

Alina Rzepnikowska
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Abstract

From its inception in 1958, the tourist and educational magazine “Poznaj Swój Kraj” [Discover Your Country] was never free from propaganda. Materials of this kind were usually included to mark congresses of the ruling Polish United Workers’ Party or national and state holidays. The official propaganda of success reached its climax in the 1970s. After 1981 eulogies of the socialism system receded and the focus of attention turned to tensions between industrial development and conservation.
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Bibliography

Chłosta‑Sikorska A., Między propagandą a rzeczywistością. Mieszkanki Nowej Huty w latach 1956–1970, Kraków 2019.
Chmiel A., Turystyka w Polsce w latach 1945–1989, Warszawa 2007.
Duraczyński E., PZPR w kryzysie — kryzys w PZPR (lato 1980 – lato 1981), „Dzieje Najnowsze” 1997, no 4, pp. 73–92.
Dytman‑Stasieńko A., Święto zawłaszczonych znaczeń. 1 maja w PRL. Ideologia, rytuał, język, Wrocław 2006.
Filipowicz Z., Propaganda w turystyce, „Turyzm Polski” 1938, no 7/8, pp. 105–108.
Gałęziowska M., Świętowanie wybranych rocznic bitwy pod Grunwaldem formą komunikacji rytualnej państwa i narodu, „Kultura i Społeczeństwo” 2012, no 4, pp. 83–108.
Karpiński A., Paradysz S., Soroka P., Żółtkowski W., Od uprzemysłowienia w PRL do dezindustrializacji kraju. Losy zakładów przemysłowych po 1945 roku, Warszawa 2015.
Nowakowski K., Ewolucja debaty publicznej — od propagandy do komunikacji społecznej, „Oblicza Komunikacji” 2009, no 2, pp. 67–82.
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Zaremba M., Propaganda sukcesu. Dekada Gierka, [w:] Propaganda PRL — wybrane problemy, ed. P. Semkow, Gdańsk 2002.
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Authors and Affiliations

Michał Rogoż
1
Agnieszka Strzałka
2

  1. Instytut Nauk o Informacji, Uniwersytet Pedagogiczny im. KEN ul. Podchorążych 2, PL 30-084 Kraków
  2. Instytut Filologii Angielskiej, Uniwersytet Pedagogiczny im. KEN, ul. Karmelicka 41, PL 30-128 Kraków
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Abstract

The paper presents the application of the Analytic Hierarchy Process technique to evaluate and choose the best alternative for acquiring hard coal for energy purposes by a potential Investor operating in the mining and energy sector. Six different sources supposed to provide hard coal were analysed, each of which might ensure a secure and independent supply of the material to the newly built coal-fired power plant. When choosing the best decision alternative, the positive and negative impacts of alternatives were considered through the BOCR analysis: benefits (B), opportunities (O), costs (C) and risks (R) analysis. For this purpose, 4 independent hierarchical models were developed. Different models have the same decision alternatives assessed, but they differ in criteria used to develop the models. In each of the models, in accordance with the AHP rules, were calculated final, global weights for the alternatives being assessed. Showing the best alternative was possible by applying the multiplicative formula (B ź O)/(C ź R), which value was used to rank and choose the best alternative from all assessed ones. The best decision alternative is the alternative where the (B ź O)/(C ź R) ratio is the highest.

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Authors and Affiliations

Eugeniusz J. Sobczyk
Aldona Wota
Stanisław Krężołek
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Abstract

To reduce the influence of the static unbalance on an infrared missile guidance system, a new static unbalance measure system for the gimbals axes has been developed. Considering the coupling effects caused by a mass eccentricity, the static balance condition and measure sequence for each gimbal axis are obtained. A novel static unbalance test approach is proposed after analyzing the dynamic model of the measured gimbal axis. This approach is to drive the measured gimbal axis to do sinusoidal reciprocating motion in a small angle and collect its drive currents in real time. Then the static unbalance of the measured gimbal axis can be obtained by the current multi-cycle integration. Also a measuring system using the proposed approach has been developed. A balanced simulator is used to verify the proposed approach by the load and repeatability tests. The results show the proposed approach enhances the efficiency of the static unbalance measurement, and the developed measuring system is able to achieve a high precision with a greater stability.
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Authors and Affiliations

Hui Yang
Yan Zhao
Min Li
Falin Wu

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