Adaptive Management of Riverine Socio-ecological Systems

If ongoing change in ecosystems and society can render inflexible policies obsolete, then management must dynamically adapt as a counter to perennial uncertainty. This chapter describes a general synthesis of how to make decision-making more adaptive and then explores the barriers to learning in management. We then describe how one such process, known as adaptive management (AM), has been applied in different river basins, on which basis we discuss AM’s strengths and limitations in various resource management contexts

Using focus groups to design systems science models that promote oral health equity

Background While the US population overall has experienced improvements in oral health over the past 60 years, oral diseases remain among the most common chronic conditions across the life course. Further, lack of access to oral health care contributes to profound and enduring oral health inequities worldwide. Vulnerable and underserved populations who commonly lack access to oral health care include racial/ethnic minority older adults living in urban environments. The aim of this study was to use a systematic approach to explicate cause and effect relationships in creating a causal map, a type of concept map in which the links between nodes represent causality or influence. Methods To improve our mental models of the real world and devise strategies to promote oral health equity, methods including system dynamics, agent-based modeling, geographic information science, and social network simulation have been leveraged by the research team. The practice of systems science modeling is situated amidst an ongoing modeling process of observing the real world, formulating mental models of how it works, setting decision rules to guide behavior, and from these heuristics, making decisions that in turn affect the state of the real world. Qualitative data were obtained from focus groups conducted with community-dwelling older adults who self-identify as African American, Dominican, or Puerto Rican to elicit their lived experiences in accessing oral health care in their northern Manhattan neighborhoods. Results The findings of this study support the multi-dimensional and multi-level perspective of access to oral health care and affirm a theorized discrepancy in fit between available dental providers and patients. The lack of information about oral health at the community level may be compromising the use and quality of oral health care among racial/ethnic minority older adults. Conclusions Well-informed community members may fill critical roles in oral health promotion, as they are viewed as highly credible sources of information and recommendations for dental providers. The next phase of this research will involve incorporating the knowledge gained from this study into simulation models that will be used to explore alternative paths toward improving oral health and health care for racial/ethnic minority older adults

The simulation of flow shop production system in PTO environment through a matrix approach in system dynamics logic

This paper faces the problem of industrial production optimization through a simulation based approach and in a context of high rigidity production constraints. When an industrial plant is made by several work centers, operating in a typical flow shop configuration, its operation can be seen as a sequence of discrete events, whose optimization can be solved as a scheduling problem. The approach shown in this work is based on a System Dynamics simulation logic. In despite of an apparent greater complexity if compared to traditional discrete event simulation approaches, this logic allows to identify at each instant the position and the confluence of each single order and, moreover, to decide in a dynamic way operations planning at each work center. The simulation approach makes use of matrices to develop the model. In order to evaluate the efficacy of the proposed approach, we have applied it to a case study, considering a flow shop production system in a PTO environment

Codons of consciousness: neurological characteristics of ordinary and pathological states of consciousness

It may eventually be possible to identify completely the temporal sequences of electrical microstates that underlie consciousness. From these "codons of consciousness" a DNA-like mathematical model of normal sequencing of the "atoms of thought" could be constructed and matched to subjective experience and behaviour. This would allow the prediction of thought and behaviour from the building blocks of consciousness. Having an intimate knowledge of the sequencing of units of consciousness may allow abnormal patterns of behaviour to be identified even in early childhood and appropriate corrective treatments to be developed. The development of this research may result in treatments for the main pathological problems that trouble all human kind

Neurofeedback to improve neurocognitive functioning of children treated for a brain tumor: design of a double blind randomized controlled trial

Background: Neurotoxicity caused by treatment for a brain tumor is a major cause of neurocognitive decline in survivors. Studies have shown that neurofeedback may enhance neurocognitive functioning. This paper describes the protocol of the PRISMA study, a randomized controlled trial to investigate the efficacy of neurofeedback to improve neurocognitive functioning in children treated for a brain tumor.Methods/Design: Efficacy of neurofeedback will be compared to placebo training in a randomized controlled double-blind trial. A total of 70 brain tumor survivors in the age range of 8 to 18 years will be recruited. Inclusion also requires caregiver-reported neurocognitive problems and being off treatment for more than two years. A group of 35 healthy siblings will be included as the control group. On the basis of a qEEG patients will be assigned to one of three treatment protocols. Thereafter patients will be randomized to receive either neurofeedback training (n=35) or placebo training (n=35). Neurocognitive tests, and questionnaires administered to the patient, caregivers, and teacher, will be used to evaluate pre- and post-intervention functioning, as well as at 6-month follow-up. Siblings will be administered the same tests and questionnaires once.Discussion: If neurofeedback proves to be effective for pediatric brain tumor survivors, this can be a valuable addition to the scarce interventions available to improve neurocognitive and psychosocial functioning.Trial registration: ClinicalTrials.gov NCT00961922. © 2012 de Ruiter et al.; licensee BioMed Central Ltd