Research reports

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2018-12-07
17:59
Zpráva o výsledcích rozboru fasádní cihly z obytného domu
Slížková, Zuzana
Vzorek fasádní cihly byl charakterizován po stránce pórovitosti, nasákavosti, mikrostruktury a obsahu vodorozpustných solí a byla posouzena současná technologie povrchové úpravy cihelné fasády.

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2018-12-07
17:59

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2018-12-07
17:59
Do higher wages produce career politicians? Evidence from two discontinuity designs
Palguta, J. ; Pertold, Filip
Wages paid to politicians affect both the selection of candidates into electoral races and the on-the-job performance incentives of incumbents. We differentiate between selection and incentive effects using two regression discontinuity designs based on: 1) population thresholds shifting politicians' wages and 2) electoral seat thresholds splitting candidates into those who narrowly won or lost. We find that higher wages do not increase the electoral incumbency advantage, suggesting that the incentive effect of higher wages does not impact re-election rates. We further show that higher wages motivate narrowly elected incumbents to run again much less often than past narrowly non-elected candidates.

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2018-12-07
17:59
Anti-social behavior in groups
Bauer, Michal ; Cahlíková, J. ; Celik Katreniak, D. ; Chytilová, Julie ; Cingl, L. ; Želinský, T.
This paper provides strong evidence supporting the long-standing speculation that decisionmaking in groups has a dark side, by magnifying the prevalence of anti-social behavior towards outsiders. A large-scale experiment implemented in Slovakia and Uganda (N=2,309) reveals that deciding in a group with randomly assigned peers increases the prevalence of anti-social behavior that reduces everyone’s payoff but which improves the relative position of own group. The effects are driven by the influence of a group context on individual behavior, rather than by group deliberation. The observed patterns are strikingly similar on both continents.

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2018-12-07
17:59
Získání dat z hlubokých horizontů dolu Rožná
Bukovská, Z. ; Bohdálek, P. ; Buda, J. ; Dobeš, P. ; Filipský, D. ; Franěk, J. ; Havlová, V. ; Chabr, T. ; Knés, I. ; Kryl, J. ; Kříbek, B. ; Laufek, F. ; Leichmann, J. ; Navrátil, P. ; Pořádek, P. ; Rosendorf, T. ; Soejono, I. ; Sosna, K. ; Souček, Kamil ; Šustková, E. ; Švagera, O. ; Vavro, Leona ; Vavro, Martin ; Veselovský, F. ; Waclawik, Petr ; Zuna, M.
Tato zpráva shrnuje práce a dílčí výsledky provedené v rámci veřejné zakázky Získání dat\nz hlubokých horizontů dolu Rožná v první etapě třetího a čtvrtého dílčího plnění od února do\nlistopadu 2018. Jedná se zejména o technické práce (provedení vrtů, zpřístupnění chodeb),\ndále seismická měření, odběr vzorků pro laboratorní analýzy (fyzikálně mechanické vlastnosti\nhornin, zlomové výplně, ložisková revalidace), strukturní charakterizace horninového\nprostředí, dále analytické práce na všech odebraných vzorcích. Souběžně s těmito pracemi\nprobíhá příprava 3D modelů, zejména příprava dat pro tvorbu modelů.

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2018-12-07
17:59
Analýza principu buzení kola turbíny magnety při různých režimech
Voronova, Evgeniya ; Maturkanič, Dušan ; Procházka, Pavel ; Hodboď, Robert
Ve zprávě je provedena analýza principu buzení vynuceného kmitání kola pomocí magnetů zapnutých v režimech: harmonickém, pulsním, pulsně-synchronním na IRC (encoder) a pulsně-synchronním na IRC (encoder) a tenzometr. Dále se ověřoval vliv šířky pulsu a frekvence buzení axiálního magnetu na vibracích lopatky modelu kola turbíny.\n

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2018-11-26
14:31
DCTOOL-A5
Bakule, Lubomír ; Papík, Martin ; Rehák, Branislav
DCTOOL-A5 presents draft of a manuscript, which is intended to be submitted for publication. This report presents a new method for the decentralized event-triggered control design for large-scale uncertain systems. The results are formulated and proved in terms of linear matrix inequalities. Two design problems are solved: For interconnected systems without any quantization and for interconnected systems with local logarithmic quantizers. Results are illustrated by an example.

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2018-11-26
14:31
DCTOOL-A4
Bakule, Lubomír ; Papík, Martin ; Rehák, Branislav
DCTOOL-A4 report presents draft of a manuscript, which is intended to be submitted for publication. The report provides a novel systematic approach to the analysis of asymptotic stability for output event-triggered uncertain centralized control systems. A class of nonlinear but nominally linear systems possessing unknown time-varying bounded uncertainties with known bounds is considered. Uncertainties are allowed in all system matrices. Original LMI-based suffi cient conditions are derived to guarantee asymptotic stability of closed-loop systems with both static output and observer-based feedback loop under even-triggered control. Both these output feedback strategies are extended to model-based uncertain control systems with\nquantized measurements. A logarithmic quantizer is considered. The Lyapunov-based approach and convex optimization serve as the main methods to derive the asymptotic LMI-based stability conditions. Bounds on the inter-event times to avoid the Zeno-effect are proved for all the cases considered. Finally, feasibility and effi ciency of the proposed strategies is demonstrated by providing numerical examples.

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2018-11-26
14:31
Social integration of immigrants and the attitude of the native population in European countries
Sargsyan, Vahan
In this paper, I focus on the relationships between the attitude of the native population towards\nimmigrants and immigration (ATII) in 20 European countries and the level of social integration\nand perceived discrimination of first and second generation immigrants in those countries. The\nstringency of naturalization policies in the host countries is also taken into consideration as a\nmechanism of the development of these relationships. The results confirm that a country’s naturalization policies fairly represent most ATII indicators, and that immigrants feel less discriminated against in more welcoming societies. However, no systematic relationship was revealed between the attitude of the native population and the social integration of immigrants. On the other hand, the results suggest lower perceived discrimination and higher social integration of first generation immigrants in countries where the naturalization status of immigrants is more secured, and the possibility of dual nationality is more restricted. The results also show that the perceived discrimination of immigrants does not decline with the duration of residence in the host countries, but the latter revealed a positive relationship with the social integration of immigrants.\n

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2018-11-26
14:31
Discrimination against workers with visible tattoos: experimental evidence from Germany
Jibuti, Daviti
We use a correspondence testing approach to study discrimination against applicants with visible tattoos in the German labor market. The method has been widely employed in discrimination literature; however, the majority of papers examine objects of discrimination that are exogenously given (gender, race, ethnicity, etc.). The design of our experiment allows us to study the extent of discrimination against choice-based characteristics. We send fictitious applications to online job postings in the banking sector. Otherwise identical applications differ only in the picture attached: in the treatment group the applicants have a visible tattoo. The\nextent of discrimination is measured by the difference in callback rates. We find that candidates without visible tattoos have, on average, a 13 percentage point higher callback rate, or an increase in the callback rate of 54%. Following Akerlof and Kranton (2000), our results once more highlight the centrality of identity.

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