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7522. Ekosocializmus
- Creator:
- Gažo, Patrik
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- ecosocialism, ecological Marxism, eco-anarchism, social ecology, degrowth, environmentalism, social-ecological transformation, social movements, non-human nature, and political strategy
- Language:
- Czech
- Description:
- This paper contributes to Contradictions’ “Conceptual Dictionary” by exploring the history, theory, and practical implications of the notion of “ecosocialism”. The first part of the text follows the historical and ideological development of ecosocialism and examines its broad and diverse anarchist, feminist, and Marxist roots. This part of the text also introduces key authors of ecosocialism and their work. The subsequent part identifies critical ideas and offers a theoretical overview of scholarly and political debates about the relationship between ecosocialism and other environmental and socio-critical approaches. Finally, the text further explores the practical and political vision of the concept and reflects on the future of ecosocialist strategy.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
7523. Ekvivalence a blokové modelování v analýze sociálních sítí
- Creator:
- Diviák, Tomáš
- Format:
- print, bez média, and svazek
- Type:
- article, články, journal articles, model:article, and TEXT
- Subject:
- Sociální interakce. Sociální komunikace, sociální interakce, shluková analýza, social interaction, cluster analysis, social network analysis, blockmodeling, relational data, 18, and 316.4/.7
- Language:
- Czech
- Description:
- The paper presents to Czech social scientists an introductory review of the concept of equivalence and the method of blockmodeling in social network analysis (SNA). After introducing the central concepts of SNA such as node and tie, along with their basic metrics such as centrality and cohesion, I present the concepts of role and position. These are treated by SNA as clusters of nodes with similar ties, something I juxtapose to algorithms to identify cohesive subgroups of nodes. Subsequently, I define and compare the two most frequently applied types of equivalence - structural, which is strict but broadly applicable, and regular, which is more liberal but has limited uses. Structural equivalence builds on a strict definition of similarity of ties, treating as equivalent only such nodes that have the same ties to the same other nodes. Regular equivalence works with looser criteria and better corresponds with both the theoretical and the intuitive notions of role; this, however, is outweighed by the absence of a unique regular-equivalent solution within a network and by the difficulty to process networks with undirected ties. Regular-equivalent nodes are such that have ties to other mutually equivalent nodes. I present examples to demonstrate the differences between both definitions. In the following section, I discuss measurement of similarity between the different nodes’ profiles of ties (e.g., correlation and Euclidean distance) and possible uses of the standard statistical methods of cluster analysis and multidimensional scaling to detect equivalent classes of nodes within networks. After pointing to the weaknesses of these techniques in network data analysis, I present blockmodeling as a method designed specifically to identify roles and positions within networks. Ischematize the blockmodeling procedure and present its basic terms before comparing classic inductive blockmodeling, which is primarily fit for the purposes of exploration and network reduction, with deductive generalized blockmodeling, which is applicable in testing hypotheses about basic structural characteristics of a network. I bring attention to the strengths and weaknesses of both approaches. Relatedly, I present an application of blockmodeling especially for the purposes of simplified network representation, comparing structural patterns across networks, and testing structural theories. In the following section, I demonstrate specific blockmodeling algorithms based on both structural equivalence (CONCOR and Tabu Search optimization) and regular equivalence (REGE and Tabu Search optimization). Then I verify the adequacy of their resulting assignment of positions to nodes using eta coefficient, Q modularity and correlation of the ideal blocked and the empirical adjacency matrices. In the concluding section, I demonstrate the entire blockmodeling procedure on an empirical case of a small network with undirected ties using the UCINET software tool, including interpretation of results. Finally, I reflect the contemporary position of blockmodeling among leading research approaches in SNA, referring to other empirically oriented studies that demonstrate the broad applicability and utility of position analysis., Tomáš Diviák., and Obsahuje použitou literaturu a poznámky
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
7524. El-Sharkawy, M. A.: How can calibrated research-based models be improved for use as a tool in identifying genes controlling crop tolerance to environmental stresses in the era of genomics-from an experimentalist's perspective. - Photosynthetica 43 (2): 161-176, 2005
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- Multiple languages
- Description:
- Errata
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
7525. Elastoplastic reaction of a container to water freezing
- Creator:
- Krejčí, Pavel
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- phase transition, water, ice, energy, entropy, and elastoplastic boundary
- Language:
- English
- Description:
- The paper deals with a model for water freezing in a deformable elastoplastic container. The mathematical problem consists of a system of one parabolic equation for temperature, one integrodifferential equation with a hysteresis operator for local volume increment, and one differential inclusion for the water content. The problem is shown to admit a unique global uniformly bounded weak solution.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
7526. Electoral competition with rationally inattentive voters
- Creator:
- Matějka, Filip and Tabellini, Guido
- Publisher:
- CERGE-EI
- Format:
- electronic, bez média, svazek, and 50 stran : ilustrace.
- Type:
- model:monograph and TEXT
- Subject:
- Volby, volební kampaně, referenda, volební chování, modelování a simulace, electoral behavior, modeling and simulation, 324:316.62, 303.094.7, (048.8), 15, and 324
- Language:
- English and Czech
- Description:
- Filip Matějka, Guido Tabellini., Obsahuje bibliografii a bibliografické odkazy, and České a anglické resumé
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
7527. Electric current density in the sunspot photosphere derived from vector magnetograms
- Creator:
- Hofmann, A. and Staude, J.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- sunspot photosphere, magnetograms, and electric current density
- Language:
- Czech
- Description:
- We present observational results from which we can determine azimuthal currents flowing across the magnetic field. Simple relations between the vertical current densities and the inclinations of the field are used to separate from each other the field-aligned component and the azimuthal component of current density. For a relatively isolated flux bundle we obtain a total azimuthal current density of (7.8 ± 3,6)' 10-2 Am-2 and an azimuthal current of (6,5 ± 3.0)‘ 10^^ A. The density of the Lorentz force acting amounts up to 1,1 -10-3 Nm-3.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
7528. Electric currents and Hα emission in the active regions on the Sun
- Creator:
- Abramenko, V. I., Gopasyuk, S. I., and Ogir, M. B.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- heliophysics and electric currents
- Language:
- Czech
- Description:
- We investigated the structure of magnetic field and vertical electric currents in two active regions. Electric currents were calculated from the observations of transverse magnetic field. There exist two systems of vertical electric currents in an active region; a system of local currents and global one. The globál current is about 2.10^^ A. In the leading part of the active region it is directed upward, and in the tail - downward and is plausibly determined by the global rotation of plasma. The flare activity is dosely connected with the value and direction of both local and globál currents: the flares tend to appear in places with upward currents. The sensitivity of Hα„ emission to the sign of current implies that the charged particles accelerated in the upper parts of magnetic loops are responsible for these formations.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
7529. Electric motor-generator for a hybrid electric vehicle
- Creator:
- Odvářka, Erik, Mebarki, Abdeslam, Gerada, David, Brown, Neil, and Ondrůšek, Čestmír
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- electrical machines, hybrid electric vehicles, electromagnetic, and thermal and control design
- Language:
- English
- Description:
- Several topologies of electrical machines can be used to meet requirements for application in a hybrid electric vehicle. This paper describes process of an electric motor-generator selection, considering electromagnetic, thermal and basic control design. The requested electrical machine must develop 45 kW in continuous operation at 1300 rpm with field weakening capability up to 2500 rpm. Both radial and axial flux topologies are considered as potential candidates. A family of axial flux machines is represented by a permanent magnet, single stator and two rotor plates topology. An induction machine was included into the selection process, alongside an embedded and inset permanent magnet synchronous machine, all of the radial type machines. and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
7530. Electrical brain wave analysis during hypnagogium
- Creator:
- Faber, J., Novák, M., Svoboda, P., and Tatarinov, V.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- micro-sleep, EEG analysis, reactivity, man-system interaction, reliability, and transportation
- Language:
- English
- Description:
- Impaired wakefulness in machine operators poses a danger not only to themselves but often to the public at large as well. While on duty, such persons are expected to be continuously, i.e., without interruption, on the alert. For that purpose, we designed and carried out an experimental model of continuous vigilance monitoring using electroencephalography (EEG) and reaction time measured as the latency of the probanďs reaction to sound stimulus. If constructed, the set together with other logical elements and an alarm systém can be used for an autornatic detection of vigilance and, possibly, also of arousal stimuli in cases of micro-sleep.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public