Ano (5841)
Počet nalezených dokumentů:
5841
Publikováno od
do
The American origin of the French Revolution
Ottinger, Sebastian; Rosenberger, L.
2024 - anglický
We show that the French combatants’ exposure to the United States increased support for the French Revolution a decade later. French regions from which more American combatants originated had more revolts against feudal institutions, revolutionary societies, volunteers for the revolutionary army, and emigrants from the Old Regime’s elite. To establish causality, we exploit two historical coincidences: i) originally, a French army of seven and a half thousand was ready to sail, but one-third did not, ii) among those deployed, only some regiments were stationed in New England. Only combatants exposed to New England affected the French Revolution after their return.
Klíčová slova:
institutional change; French Revolution; American War of Independence
Dokument je dostupný na externích webových stránkách.
The American origin of the French Revolution
We show that the French combatants’ exposure to the United States increased support for the French Revolution a decade later. French regions from which more American combatants originated had more ...
Emerging Contaminants in Sewage Sludge: Analysis and Their Removal by Pyrolysis
Hušek, Matěj
2024 - anglický
The study continues with flame retardants (e.g., phosphorus-based or brominated) present in sludge, which may pose a hazard to nature and human health3,4. There is a lack of information on their pyrolysis removal and occurrence in the sludge in the Czech Republic.
Klíčová slova:
sewage sludge; pyrolysis; PFAS; flame retardants
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Emerging Contaminants in Sewage Sludge: Analysis and Their Removal by Pyrolysis
The study continues with flame retardants (e.g., phosphorus-based or brominated) present in sludge, which may pose a hazard to nature and human health3,4. There is a lack of information on their ...
Cholinium Based Ionic Liquids: Influence of Water as a Co-solvent on Their Physico-chemical Properties and Preliminary Results for Dissolution of Biopolymers
Souvenir Zafindrajaona, Mahasoa-Salina
2024 - anglický
Ionic liquids (ILs) are emerging as promising alternative solvents in the field of natural substance extraction, offering significant advantages over traditional solvents. Since the last decade, we notice the increasing use of greener solvent alternatives such as Natural Deep Eutectic Solvents (NaDES) or ILs for the extraction of highly valuable compounds from natural sources such as lignocellulose. During this presentation, the influence of water on heat capacity, density, speed of sound and TGA will be discussed and the preliminary results for lignin dissolution willbe presented.
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Cholinium Based Ionic Liquids: Influence of Water as a Co-solvent on Their Physico-chemical Properties and Preliminary Results for Dissolution of Biopolymers
Ionic liquids (ILs) are emerging as promising alternative solvents in the field of natural substance extraction, offering significant advantages over traditional solvents. Since the last decade, we ...
14th International Bordetella Symposium
Šebo, Peter
2024 - anglický
We shall discuss the latest research achievements in the Bordatella/pertussis filed and how to tackle the challenge of current pertussis resurgence. We will assess what needs to be done to overcome the limitations of current acellular pertussis vaccines in order to curb the resurgence and transmission of whoopong cough.
Klíčová slova:
bordetella; petrussis; vaccine
Plné texty jsou dostupné v digitálním repozitáři Akademie Věd.
14th International Bordetella Symposium
We shall discuss the latest research achievements in the Bordatella/pertussis filed and how to tackle the challenge of current pertussis resurgence. We will assess what needs to be done to overcome ...
Digitální systémy pro monitorování BOZP
VÚBP
2024 - český
Digitální systémy pro monitorování BOZP využívají digitální technologii ke shromažďování a analýze dat za účelem identifikace a hodnocení rizik na pracovišti.
Klíčová slova:
digitalizace; digitální systémy; BOZP; bezpečnost práce; digitalisation; digital systems; OSH; occupational safety
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Digitální systémy pro monitorování BOZP
Digitální systémy pro monitorování BOZP využívají digitální technologii ke shromažďování a analýze dat za účelem identifikace a hodnocení rizik na pracovišti.
Automatizace pracovních úkolů
VÚBP
2024 - český
Systémy založené na umělé inteligenci (AI) pro automatizaci kognitivních i fyzických úkolů vykazují slibné výsledky v různých odvětvích. Využívání umělé inteligence a robotiky k automatizaci nebezpečných nebo opakujících se úkolů na pracovišti v rámci ochrany pracovníků je tak v současnosti na vzestupu.
Klíčová slova:
umělá inteligence; BOZP; automatizace; artificial intelligence; OSH; automation
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Automatizace pracovních úkolů
Systémy založené na umělé inteligenci (AI) pro automatizaci kognitivních i fyzických úkolů vykazují slibné výsledky v různých odvětvích. Využívání umělé inteligence a robotiky k automatizaci ...
Galloping of insulated bundled overhead line - nonlinear numerical analysis in time domain
Macháček, Michael; Hračov, Stanislav
2024 - anglický
Our contribution focuses on a 3D numerical nonlinear analysis of galloping in a specific bundled overhead line with ice accretion. We studied the susceptibility to this self-excited oscillation, critical onset wind speeds, and global dynamic response of a very low-tensioned line with simulated icing observed on similar real conductors. Due to the highly nonlinear mechanical behavior of such a flexible cable, we employed the Newmark integration method combined with the iterative Newton-Raphson method. We analyzed two numerical models of the overhead line loaded by the wind: one assuming nonlinearity only in the wind load, while retaining the linearity of the mechanical system itself, and the other representing a fully nonlinear system including geometrical nonlinearity. Our analysis revealed that the determined critical wind speeds for the onset of galloping are in relatively close ranges for both models. However, numerical simulations with the fully nonlinear system indicated significantly lower amplitudes of limit cycle oscillations, especially at higher wind speeds, compared to the linear model of the line. This underscores the necessity of using fully nonlinear models during the design stage of such low-tensioned aerial conductors.
Klíčová slova:
aerial bundled conductors; wind effects; galloping; limit cycle oscillation
Plné texty jsou dostupné v digitálním repozitáři Akademie Věd.
Galloping of insulated bundled overhead line - nonlinear numerical analysis in time domain
Our contribution focuses on a 3D numerical nonlinear analysis of galloping in a specific bundled overhead line with ice accretion. We studied the susceptibility to this self-excited oscillation, ...
COVID-19 and political preferences through stages of the pandemic: the case of the Czech Republic
Bičáková, Alena; Jurajda, Štěpán
2024 - anglický
We track the effects of the COVID-19 pandemic on political preferences through ‘high’ and ‘low’ phases of the pandemic. We ask about the effects of the health and the economic costs of the pandemic measured at both personal and municipality levels. Consistent with the literature, we estimate effects suggestive of political accountability of leaders during ‘high’ pandemic phases. However, we also find that the pandemic political accountability effects are mostly short-lived, and do not extend to the first post-pandemic elections.
Klíčová slova:
COVID-19; political preferences; election outcomes
Dokument je dostupný na externích webových stránkách.
COVID-19 and political preferences through stages of the pandemic: the case of the Czech Republic
We track the effects of the COVID-19 pandemic on political preferences through ‘high’ and ‘low’ phases of the pandemic. We ask about the effects of the health and the economic costs of the pandemic ...
(Ne)zájem žáků o učitelskou profesi: mezinárodní srovnání
Federičová, Miroslava
2024 - český
Mnoho evropských zemí včetně Česka se v současnosti potýká s nedostatkem učitelů, těch kvalitních obzvlášť. Jedním z řešení je podpora učitelských profesních aspirací už u mladých během jejich studia na základní a střední škole. Tato studie empiricky mapuje učitelské aspirace v evropských zemích mezi 15letými žáky na základě dat z mezinárodního šetření PISA. Many European countries, including the Czech Republic, currently face a shortage of teachers, especially quality teachers. One possible solution to this would be to support aspiring teachers at a younger age, during their studies at primary and secondary school. This study provides an empirical overview of teaching aspirations among 15-year-old school pupils in European countries based on data from the international PISA survey.
Klíčová slova:
teachers; teaching aspirations; international comparison
Dokument je dostupný na externích webových stránkách.
(Ne)zájem žáků o učitelskou profesi: mezinárodní srovnání
Mnoho evropských zemí včetně Česka se v současnosti potýká s nedostatkem učitelů, těch kvalitních obzvlášť. Jedním z řešení je podpora učitelských profesních aspirací už u mladých během jejich studia ...
Flow simulations approach for flocculation tanks
Idžakovičová, Kristýna; Bílek, Vojtěch; Haidl, Jan; Isoz, M.; Pivokonský, Martin
2024 - anglický
Flocculation in water treatment facilities plays a key role in the separation of colloidal inorganic and organic substances. Its optimization leads to a significant increase in its efficiency and savings of operational costs. However, it is currently based on trial-and-error experimental approaches. In this contribution, we focus on flow modeling in stirred flocculation tanks that would, after coupling with a calibrated model of particle aggregation, enable simulationbased flocculation optimization. Despite the abundance of literature on stirred tank modeling, there is no universal agreement on the methodology used to describe turbulence nor on the approach to the computational mesh creation. Consequently, there is no unified methodology for simulations and their validation. To address this, we present a best-practice methodology for economical, yet reliable flow simulations in the said device. This methodology includes the choice of the turbulence model, the approach to the design of a high quality mesh suitable for arbitrary geometries, and results evaluation. It is developed based on an extensive literature review, a multitude of flow simulations using several meshes of progressively higher quality and resolution, and various strategies to converge to steady-state flow conditions. The simulation quality indicators used here involve comparison with the experimental data on fluid velocity, stirrer power output, and flow rate through the impeller zone. Additionally, the resulting flow simulation models are compared using tracer transport simulations, hinting at their potential for coupling with particle aggregation models.
Klíčová slova:
flocculation tank; stirring; MRF; CFD; OpenFOAM
Plné texty jsou dostupné v digitálním repozitáři Akademie Věd.
Flow simulations approach for flocculation tanks
Flocculation in water treatment facilities plays a key role in the separation of colloidal inorganic and organic substances. Its optimization leads to a significant increase in its efficiency and ...
NUŠL poskytuje centrální přístup k informacím o šedé literatuře vznikající v ČR v oblastech vědy, výzkumu a vzdělávání. Více informací o šedé literatuře a NUŠL najdete na webu služby.
Vaše náměty a připomínky posílejte na email nusl@techlib.cz
Provozovatel
Zahraniční báze