68 research outputs found
Constraint-Flow Nets: A Model for Building Constraints from Resource Dependencies
The major research in the resource management literature focuses primarily on two complementary sub-problems: (1) specification languages for formulating resource requests and (2) constraint problems modelling allocation and scheduling. Both directions assume the knowledge of the underlying platform architecture and the dependencies it induces on the usage of the various resources. In this paper, we bridge this gap by introducing constraint-flow nets (cfNets). A cfNet is defined by a set of resources and dependencies between them, each dependency having an associated constraint schema. The model is inspired by Petri nets, with resources corresponding to places and dependencies—to transitions. Given an architecture of dependent resources, an initial resource request is propagated through the dependencies. The generated constraints are then conjuncted into the global allocation constraint. We study the notion of conflicts in cfNets and prove that for conflict-free cfNets the global allocation constraint can be constructed unambiguously. Furthermore, we provide an SMT-based algorithm for conflict detection and discuss the use of priorities to dynamically resolve conflicts at run-time. Finally, we illustrate the use of cfNets on a case study inspired by the Kalray MPPA architecture
Validation of the Cognitive Assessment of Later Life Status (CALLS) instrument: a computerized telephonic measure
<p>Abstract</p> <p>Background</p> <p>Brief screening tests have been developed to measure cognitive performance and dementia, yet they measure limited cognitive domains and often lack construct validity. Neuropsychological assessments, while comprehensive, are too costly and time-consuming for epidemiological studies. This study's aim was to develop a psychometrically valid telephone administered test of cognitive function in aging.</p> <p>Methods</p> <p>Using a sequential hierarchical strategy, each stage of test development did not proceed until specified criteria were met. The 30 minute Cognitive Assessment of Later Life Status (CALLS) measure and a 2.5 hour in-person neuropsychological assessment were conducted with a randomly selected sample of 211 participants 65 years and older that included equivalent distributions of men and women from ethnically diverse populations.</p> <p>Results</p> <p>Overall Cronbach's coefficient alpha for the CALLS test was 0.81. A principal component analysis of the CALLS tests yielded five components. The CALLS total score was significantly correlated with four neuropsychological assessment components. Older age and having a high school education or less was significantly correlated with lower CALLS total scores. Females scored better overall than males. There were no score differences based on race.</p> <p>Conclusion</p> <p>The CALLS test is a valid measure that provides a unique opportunity to reliably and efficiently study cognitive function in large populations.</p
Adjusting to life after treatment: distress and quality of life following treatment for breast cancer
Clinical and anecdotal findings suggest that the completion of cancer treatment may be marked by heightened distress and disrupted adjustment. The present study examined psychological adjustment during the 3 months following treatment among 89 women with stages 0–III breast cancer. Participants completed measures of depression, cancer-related anxiety, cancer concerns, and quality of life at three time points: during treatment, 3 weeks following the end of treatment, and 3 months post-treatment. Post-treatment scores were suggestive of good psychological adjustment among the majority of women. Moreover, distress did not increase following treatment; longitudinal analyses showed no significant changes in depression or recurrence worry, while intrusive thoughts decreased, and quality of life improved. Younger age predicted greater distress across measures. A history of depression or anxiety predicted greater depressive symptomatology, while more extensive treatment predicted greater cancer-related anxiety. Despite the lack of distress endorsed on general depression and anxiety indices, participants reported moderate distress associated with cancer-related concerns, including physical problems, fear of cancer recurrence, and resuming normal life. In sum, while breast cancer survivors demonstrate good adjustment on general distress indices following treatment, some women are at risk for sustained distress. Moreover, significant cancer-related concerns are prevalent and may be important intervention targets
Diseño de un modelo de referenciación a personas en emergencia social vÃctimas del conflicto armado residentes en Bogotá
Tesis de GradoEl propósito de la investigación fue diseñar la estructura conceptual de un modelo de referenciación para vÃctimas del conflicto armado atendidas en el servicio Enlace Social de la Secretaria Distrital de Integración Social residentes Bogotá. Asà como, realizar la caracterización de 361 registros de la ficha del sistema de registro de beneficiarios SIRBE aplicada a VCA participantes en el servicio ES de la SDIS desde el año 2013 hasta Septiembre del 2017 y caracterización 18 instituciones y 29 programas o servicios dirigidos a VCA con el fin de identificar la oferta de servicios sociales disponibles para este grupo poblacional.1. Resumen
2. Antecedentes conceptuales y empÃricos 3. Justificación
4. Objetivos
5. Método
6. Resultados
7. Discusión y conclusiones
8. Referencias
9. ApéndicesMaestrÃaMagister en PsicologÃ
Reduced Glutathione Concentration in Relation to the Age and Weight of New Hampshire and White Leghorn Embryos
The influence of five monoamine genes on trajectories of depressive symptoms across adolescence and young adulthood
The influence of five monoamine candidate genes on depressive symptom trajectories in adolescence and young adulthood were examined in the Add Health genetic sample. Results indicated that, for all respondents, carriers of the DRD4 5-repeat allele were characterized by distinct depressive symptom trajectories across adolescence and early adulthood. Similarly, for males, individuals with the MAOA 3.5-repeat allele exhibited unique depressive symptom trajectories. Specifically, the trajectories of those with the DRD4 5-repeat allele were characterized by rising levels in the transition to adulthood, while their peers were experiencing a normative drop in depressive symptom frequency. Conversely, males with the MAOA 3.5-repeat allele were shown to experience increased distress in late adolescence. An empirical method for examining a wide array of allelic combinations was employed, and false discovery rate methods were used to control the risk of false positives due to multiple testing. Special attention was given to thoroughly interrogate the robustness of the putative genetic effects. These results demonstrate the value of combining dynamic developmental perspectives with statistical genetic methods to optimize the search for genetic influences on psychopathology across the life course
Service dependencies in information systems security
International audienceIn the complex world of information services, we are realizing that system dependencies upon one another have not only operational implications but also security implications. These security implications are multifold. Beyond allowing an attacker to propagate over an information system by leveraging stepping stones vulnerabilities, it also allows a defender to select the most interesting enforcement points for its policies, overall reducing the cost of managing the security of these complex systems. In this paper, we present a dependency model that has been designed for the purpose of providing security operators with a quantitative decision support system for deploying and managing security policies
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