En busca de un pogrom perdido : Diáspora judía, política y políticas de la memoria en torno a la Semana Trágica de 1919 (1919-1999)

El presente trabajo se propone explorar la formación y transmisión de la memoria colectiva relacionada con los hechos antijudíos ocurridos durante la denominada Semana Trágica, transcurrida en Buenos durante enero de 1919. Centrándose en el rol del colectivo judío, pero también considerando el rol de otros agentes de transmisión como escritores e historiadores, se analizarán las vías por las cuales dicho recuerdo circuló así como las diversas coyunturas de activación de dichas memorias a lo largo del siglo XX

En busca de un pogrom perdido : Diáspora judía, política y políticas de la memoria en torno a la Semana Trágica de 1919 (1919-1999)

El presente trabajo se propone explorar la formación y transmisión de la memoria colectiva relacionada con los hechos antijudíos ocurridos durante la denominada Semana Trágica, transcurrida en Buenos durante enero de 1919. Centrándose en el rol del colectivo judío, pero también considerando el rol de otros agentes de transmisión como escritores e historiadores, se analizarán las vías por las cuales dicho recuerdo circuló así como las diversas coyunturas de activación de dichas memorias a lo largo del siglo XX

En busca de un pogrom perdido : Diáspora judía, política y políticas de la memoria en torno a la Semana Trágica de 1919 (1919-1999)

El presente trabajo se propone explorar la formación y transmisión de la memoria colectiva relacionada con los hechos antijudíos ocurridos durante la denominada Semana Trágica, transcurrida en Buenos durante enero de 1919. Centrándose en el rol del colectivo judío, pero también considerando el rol de otros agentes de transmisión como escritores e historiadores, se analizarán las vías por las cuales dicho recuerdo circuló así como las diversas coyunturas de activación de dichas memorias a lo largo del siglo XX

Negative map of Jewish settlements in Ukraine and Crimea

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Precipitation in the regions of Jewish colonization (incomplete)

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Growth of Jewish Land Settlements in Crimea 1924-1934

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Growth of Jewish land setllements in Crimea 1924-1929

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Negative photo map of Jewish settlements in the Krivoy Rog district

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Shared leadership in Queensland schools : a collective case study

Shared leadership has been identified as a key governance base for the future of government and Catholic schools in Queensland, the state’s two largest providers of school education. Shared leadership values the contributions that many individuals can make through collaboration and teamwork. It claims to improve organisational performance and reduce the increasing pressures faced by principals. However despite these positive features, shared leadership is generally not well understood, not well accepted and not valued by those who practice or study leadership. A collective case study method was chosen, incorporating a series of semi-structured interviews with principals and the use of official school documents. The study has explored the current understanding and practice of shared leadership in four Queensland schools and investigated its potential for use.

On collective unintelligence

The idea of collective unintelligence is examined in this paper to highlight some of the conceptual and practical problems faced in modeling groups. Examples drawn from international crises and economics provide illustrative problems of collective failures to act in intelligent ways, despite the inputs and efforts of many skilled and intelligent parties. Choices made of “appropriate” perceptions, analysis and evaluations are examined along with how these might be combined. A simple vector representation illustrates some of the issues and creative possibilities in multi-party actions. Revealed as manifest (un-)intelligence are the resolutions of various problems and potentials that arise in dealing with the “each and all” of a group (wherein items are necessarily non-parallel and of unequal valency). Such issues challenge those seeking to model collective intelligence, but much may be learned.

Models of collective cell spreading with variable cell aspect ratio : a motivation for degenerate diffusion models

Continuum diffusion models are often used to represent the collective motion of cell populations. Most previous studies have simply used linear diffusion to represent collective cell spreading, while others found that degenerate nonlinear diffusion provides a better match to experimental cell density profiles. In the cell modeling literature there is no guidance available with regard to which approach is more appropriate for representing the spreading of cell populations. Furthermore, there is no knowledge of particular experimental measurements that can be made to distinguish between situations where these two models are appropriate. Here we provide a link between individual-based and continuum models using a multi-scale approach in which we analyze the collective motion of a population of interacting agents in a generalized lattice-based exclusion process. For round agents that occupy a single lattice site, we find that the relevant continuum description of the system is a linear diffusion equation, whereas for elongated rod-shaped agents that occupy L adjacent lattice sites we find that the relevant continuum description is connected to the porous media equation (pme). The exponent in the nonlinear diffusivity function is related to the aspect ratio of the agents. Our work provides a physical connection between modeling collective cell spreading and the use of either the linear diffusion equation or the pme to represent cell density profiles. Results suggest that when using continuum models to represent cell population spreading, we should take care to account for variations in the cell aspect ratio because different aspect ratios lead to different continuum models.

Manipulating task constraints to improve tactical knowledge and collective decision-making in rugby union

In team sports such as rugby union, a myriad of decisions and actions occur within the boundaries that compose the performance perceptual- motor workspace. The way that these performance boundaries constrain decision making and action has recently interested researchers and has involved developing an understanding of the concept of constraints. Considering team sports as complex dynamical systems, signifies that they are composed of multiple, independent agents (i.e. individual players) whose interactions are highly integrated. This level of complexity is characterized by the multiple ways that players in a rugby field can interact. It affords the emergence of rich patterns of behaviour, such as rucks, mauls, and collective tactical actions that emerge due to players’ adjustments to dynamically varying competition environments. During performance, the decisions and actions of each player are constrained by multiple causes (e.g. technical and tactical skills, emotional states, plans, thoughts, etc.) that generate multiple effects (e.g. to run or pass, to move forward to tackle or maintain position and drive the opponent to the line), a prime feature in a complex systems approach to team games performance (Bar- Yam, 2004). To establish a bridge between the complexity sciences and learning design in team sports like rugby union, the aim of practice sessions is to prepare players to pick up and explore the information available in the multiple constraints (i.e. the causes) that influence performance. Therefore, learning design in training sessions should be soundly based on the interactions amongst players (i.e.teammates and opponents) that will occur in rugby matches. To improve individual and collective decision making in rugby union, Passos and colleagues proposed in previous work a performer- environment interaction- based approach rather than a traditional performer- based approach (Passos, Araújo, Davids & Shuttleworth, 2008).