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Joint Activity (joint + activity)

Distribution by Scientific Domains

Humanities and Social Sciences	37%

Selected Abstracts

Dealing with Timing and Synchronization in Opportunities for Joint Activity Participation

GEOGRAPHICAL ANALYSIS, Issue 3 2010
Tijs Neutens
The ability of people to access opportunities offered by the built environment is circumscribed by various sets of space,time constraints, including the requirements to meet other persons at particular times and places to undertake activities together. While models of space,time accessibility recognize that joint activities may constrain the performance of activities in space and time, their specifications do not explicitly acknowledge the opportunities that individuals of a group have for joint activity participation. Therefore, this article focuses on joint activity participation and argues that collective activity decisions are the outcome of a complex process involving various aspects of timing, synchronization, and social hierarchy. The utility-theoretic model proposed here quantifies the extent to which opportunities can be jointly accessed by a particular group of people within a specific time period. Central to the approach are three key variables: the attractiveness of an opportunity, the time available for activity participation, and the travel time to an activity location. Because of the multiperson character of joint activities, the determination of these variables is subject to individual preferences, privileges, and power differentials within a group. Specific attention is given to how time-of-day and synchronization effects influence the opportunities accessible to a group of individuals. The impact of these factors on joint accessibility is illustrated by a real-world example of an everyday rendezvous scenario. The outcomes of a simulation exercise suggest that time-of-day and synchronization effects significantly affect the benefits that can be gained from opportunities for joint activities. La capacidad de acceso a las oportunidades que los entornos construidos (como las ciudades) ofrecen a las personas, está limitada por un conjunto diverso de restricciones espacio-temporales. Entre ellas se incluyen los requisitos para coincidir y encontrarse con otras personas en determinados momentos y lugares con el fin de realizar actividades conjuntas. Los modelos de accesibilidad comunes reconocen que las actividades conjuntas pueden limitar el ejercicio de actividades en el espacio y el tiempo. Sin embargo, sus especificaciones no reconocen explícitamente las oportunidades disponibles a todos los individuos de un grupo para participar de una actividad conjunta. Es en este contexto y dadas las limitaciones descritas que este artículo se centra en la participación de individuos en actividades conjuntas y propone el argumento que la toma de decisiones relacionadas con dichas actividades son el resultado de un proceso complejo que involucra varios aspectos de temporización (programación temporal), sincronización, y jerarquía social. El modelo teórico de utilidad que se propone aquí cuantifica el grado en que las oportunidades pueden ser evaluadas en forma conjunta por un grupo de personas particular dentro de un período de tiempo específico. El marco general propuesto por los autores se basa en tres variables fundamentales: el atractivo de una oportunidad, el tiempo disponible para la participación de la actividad, y el tiempo de desplazamiento al lugar donde se lleva a cabo actividad. Debido al carácter particular de estas actividades (que involucran múltiples participantes), la determinación de estas variables está sujeta a preferencias individuales, a privilegios y a diferencias de poder dentro de un grupo. El presente estudio además presta atención especial a la forma en la que la hora del día y los efectos de sincronización pueden influenciar la disponibilidad de oportunidades para un grupo determinado de individuos. El impacto de estos factores sobre la accesibilidad agregada de actividades conjuntas es ejemplificado por los autores mediante un caso del mundo real que utiliza escenarios de encuentros diarios entre personas. Los resultados de este ejercicio de simulación sugieren que los efectos de la hora del día y la sincronización afectan significativamente los beneficios que se pueden obtener a partir las oportunidades disponibles para acceder a y realizar actividades conjuntas. [source]

Mother,child joint activity and behaviour problems of pre-school children

THE JOURNAL OF CHILD PSYCHOLOGY AND PSYCHIATRY AND ALLIED DISCIPLINES, Issue 7 2003
Kumari Chandani Galboda-Liyanage
Background: Behaviour problems are common among pre-school children, and a substantial proportion persist, causing significant burden to the family, schools and health services. Relatively little research has addressed the effects of positive parenting on behaviour disorder in pre-school children, particularly in larger population-based studies. Method: A cross-sectional postal survey of a representative, population-based sample of 800 mothers of 3½-year-old children living in an outer London Borough was carried out to assess the association between mother,child joint activity and behaviour problems of pre-school children. The response rate was 70%. Results: Lower levels of mother,child joint activity remained independently associated with behaviour problems of pre-school children both on a binary and a continuous scale after adjusting for a wide range of household, maternal and child circumstances. The association between low levels of mother,child joint activities and behaviour problems of the children was stronger in the presence of social problems in the family. Conclusion: Possible causal pathways and directions for future research and intervention are discussed. [source]

To Commit or Not to Commit: Modeling Agent Conversations for Action

COMPUTATIONAL INTELLIGENCE, Issue 2 2002
Roberto A. Flores
Conversations are sequences of messages exchanged among interacting agents. For conversations to be meaningful, agents ought to follow commonly known specifications limiting the types of messages that can be exchanged at any point in the conversation. These specifications are usually implemented using conversation policies (which are rules of inference) or conversation protocols (which are predefined conversation templates). In this article we present a semantic model for specifying conversations using conversation policies. This model is based on the principles that the negotiation and uptake of shared social commitments entail the adoption of obligations to action, which indicate the actions that agents have agreed to perform. In the same way, obligations are retracted based on the negotiation to discharge their corresponding shared social commitments. Based on these principles, conversations are specified as interaction specifications that model the ideal sequencing of agent participations negotiating the execution of actions in a joint activity. These specifications not only specify the adoption and discharge of shared commitments and obligations during an activity, but also indicate the commitments and obligations that are required (as preconditions) or that outlive a joint activity (as postconditions). We model the Contract Net Protocol as an example of the specification of conversations in a joint activity. [source]

The telling or the tale?

JOURNAL OF SOCIOLINGUISTICS, Issue 2 2000
Narratives, gender in adolescent friendship networks
The paper analyses the narratives told between adolescent friends, recorded in single-sex friendship groups with a fieldworker. It confirms the importance of narratives in the construction of friendship and, specifically, in the interpretation of past experience according to peer group norms. The link between the self and others is different in the narratives told by the male friends and the female friends. The boys establish a sense of group identity through the joint activity of ,telling', whilst for the girls the links are between individual selves, constructed through their tales. Key figures in the friendship groups take the lead in demonstrating how events are interpreted. The same speaker uses styles that could be labelled ,competitive' and styles that could be labelled ,cooperative', depending on the interactional context. [source]

Application of fast-digitizer card Acqiris DP-240 in positron lifetime spectroscopy

PHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 11 2009
Martin Petriska
Abstract Based on the available knowledge base in positron annihilation measurements, new software for digital positron lifetime spectrometry has been designed within the frame of joint activity between STU Bratislava and JRC Petten. The tests of the new positron digital-life time setup have been carried out. Detectors with BaF2 scintillators and fast-dynode outputs were chosen for such studies. As the digitiser unit, the card Acqiris DP240 was fully tested. Originally, start and stop timing signals were sampled to digital waveforms separately at a rate of 1 GS/s in 8 bit resolution. However, due to limited quality of collected waveforms which significantly affected post-processing of data, the joined delayed channel mode with 2 GS/s sampling rate was applied for further studies. The full setup was benchmarked by a series of calibration measurements of two high purity materials, specifically Si and Ni. The inter-comparison of conventional analogue- and digital-based processing are discussed in detail. Further, the optimisation of main parameters for waveform-processing are analysed too. Such a new approach in the digital life-time spectroscopy will help to improve the resolution of existing methodology which might enhance the capabilities of this technique for further applications, especially in materials science. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Mother,child joint activity and behaviour problems of pre-school children

Public Relations Planning and Action as "Practical-Critical" Communication

COMMUNICATION THEORY, Issue 4 2003
Wayne D. Woodward
A practical-critical approach to communication contends that critical analysis should have practical consequences, specifically to extend participation and to introduce innovative forms of communication. Planning and action process models in public relations illustrate the approach. The practical-critical position develops out of a reconstructive revision of existing, instrumental models. The emphases are (a) variabilities and contingencies in communication, (b) temporal sequencing of cooperative activity, (c) conditions of uncertainty that are part of pursuing a shared focus through joint activity, and (d) the interdependent relations among material, symbolic, and relational dimensions of process planning and action. The practical-critical framework provides for continuous, dialectical analysis of a central focus of activity, while deriving benefits from the sequencing of cooperative effort. [source]