Abstract
We consider control of reaction and population systems by imposing transitions between states with different numbers of particles or individuals. The transitions take place at predetermined instants of time. Even where they are significantly less frequent than spontaneous transitions, they can expon...
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PMID: 21517535
PDF is available here.
Abstract
We consider open quantum systems with dynamics described by master equations that have perturbative expansions in the system-environment interaction. We show that, contrary to intuition, full-time solutions of order-2n accuracy require an order-(2n+2) master equation. We give two examples of such in...
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PMID: 21517464
PDF is available here.
Abstract
Quality improvement (QI) in health care involves activities ranging from enhancing personal practice to reforming the larger health care system. The Accreditation Council for Graduate Medical Education recognizes this broad definition of QI in its requirement that physicians-in-training demonstrate...
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PMID: 20881823
PDF is available here.
Abstract
The purpose of this paper is to propose foundations for a theory of errors in teamwork based upon analysis of a case study of fratricide alongside a review of the existing literature. This approach may help to promote a better understanding of interactions within complex systems and help in the form...
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PMID: 20865603
PDF is available here.
Abstract
Since 1958 more than 80 journal papers from the mainstream ergonomics literature have used either the words 'complex' or 'complexity' in their titles. Of those, more than 90% have been published in only the past 20 years. This observation communicates something interesting about the way in which con...
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PMID: 20865602
PDF is available here.
Abstract
We live in contact with a multitude of microbes, but we also live with billions of symbionts that span all the shades from mutualists to potential killers. Together, we compose a superorganism that is capable of optimal living. In that context, the immune system is not a killer, but rather a force t...
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PMID: 20445502
PDF is available here.
Abstract
A randomized trial assessed the effectiveness of a 2-level strategy for implementing evidence-based mental health treatments for delinquent youth.
A 2 x 2 design encompassing 14 rural Appalachian counties included 2 factors: (a) the random assignment of delinquent youth within each county to a multi...
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PMID: 20658810
PDF is available here.
Abstract
We modify the commonly used invasibility concept for coexistence of species to the stronger concept of uniform invasibility. For two-species discrete-time competition and predator-prey models, we use this concept to find broad easily checked sufficient conditions for the rigorous concept of permanen...
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PMID: 20394765
PDF is available here.
Abstract
This study demonstrates the potential for using the generalizability theory to make decisions regarding the rank order of activity among individuals (relative decision) and compliance rates for physical activity recommendations (absolute decision)....
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PMID: 20139788
PDF is available here.
Abstract
The UK health service, which had been diagnosed to be seriously out of step with good design practice, has been recommended to obtain knowledge of design and risk management practice from other safety-critical industries. While these other industries have benefited from a broad range of systems mode...
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PMID: 20582765
PDF is available here.
Abstract
The classical approach to the modeling of reality is founded upon its objectification. Although successful dealing with inanimate matter, objectification has proven to be much less successful elsewhere, sometimes to the point of paradox. This paper discusses an approach to the modeling of reality ba...
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PMID: 20587299
PDF is available here.
Abstract
Team coordination consists of both the dynamics of team member interaction and the environmental dynamics to which a team is subjected. Focusing on dynamics, an approach is developed that contrasts with traditional aggregate-static concepts of team coordination as characterized by the shared mental...
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PMID: 20587302
PDF is available here.
Abstract
We propose a three-level taxonomy of conceptual frameworks for use in environmental health impact assessment. At the first level of the taxonomy, structural frameworks show the wide context of the issues at hand. At the second level, relational frameworks describe how the assessment variables are ca...
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PMID: 20406707
PDF is available here.
Abstract
As systems evolve over time, their natural tendency is to become increasingly more complex. Studies in the field of complex systems have generated new perspectives on management in social organizations such as hospitals. Much of this research appears as a natural extension of the cross-disciplinary...
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PMID: 20502191
PDF is available here.
Abstract
Our main objective is to identify the variance components that contribute to estimation errors and implement strategies to reduce the influence of these error sources on the measurement. Executive functioning in typical and premature babies is studied at 15 and 24 months. The results show difference...
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PMID: 20423625
PDF is available here.
Abstract
We investigated the efficacy of a Dutch version of this treatment (VERS). Seventy-nine DSM-IV BPD patients were randomly assigned to STEPPS plus an adjunctive individual therapy, or to treatment as usual. Assessments took place before and after the intervention, and at a 6-month follow-up. STEPPS re...
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PMID: 20386260
PDF is available here.
Abstract
There are significant points of alignment between a macrocognitive frame of teamwork and a communication perspective. This commentary explores these touch points in regard to use of teams in sociotechnical systems (STS).
The macrocognitive framework emphasizes a team's shared mental models whereas a...
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PMID: 20942261
PDF is available here.
Abstract
We link the problem of complex sociotechnical systems to a new unit-of-analysis and fruitful developing area of applied research, the multiteam system.
Teams are the dominant entity and theoretical lens being applied to understanding the performance of complex sociotechnical systems. We submit that...
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PMID: 20942260
PDF is available here.
Abstract
This commentary on the special issue suggests a focus on group cognition factors in investigations of teamwork involving sociotechnical systems.
The author has conducted research in computer-supported collaborative learning and has found the need to rethink the theory and methodology of that field t...
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PMID: 20942262
PDF is available here.
Abstract
Findings from this case study suggest that MST has the potential to reduce transmission risk behaviors among teens with HIV....
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PMID: 19815654
PDF is available here.
Abstract
The participants' mean age was 12.2 years; 53.5% were girls; and 84.4% were still enrolled at 24 months. Abstinence-only intervention reduced sexual initiation (risk ratio [RR], 0.67; 95% confidence interval [CI], 0.48-0.96). The model-estimated probability of ever having sexual intercourse by the 2...
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PMID: 20124144
PDF is available here.
Abstract
This paper highlights the distinction between precursor and control variables in the context of reasoned action theory. Here the theory is combined with structural equation modeling to demonstrate how age and past sexual behavior should be situated in a reasoned action analysis. A tw...
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PMID: 19370408
PDF is available here.
Abstract
We interpret the separability of spatial selection and identification as reflecting the independent operation of dorsal and ventral visual pathways, respectively, at least at the early stages of processing....
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PMID: 20377284
PDF is available here.
Abstract
To work with adolescents and their contexts usually means to face certain problems: Parents or teacher want the adolescent to do a counselling or a therapy, the adolescent is not motivated or does not have much of an idea what this means. The problem often causes conflicts between the adolescent and...
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PMID: 20345085
PDF is available here.
Abstract
We propose an innovative academically based system to train and support the care pilot and practice transformation in primary care and rural practice settings....
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PMID: 20228632
PDF is available here.
Abstract
Mixing and dispersion processes affect the timing and concentration of contaminants transported within urban drainage systems. Hence, methods of characterising the mixing effects of specific hydraulic structures are of interest to drainage network modellers. Previous research, focusing on surcharged...
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PMID: 20389006
PDF is available here.
Abstract
In this paper, the concept of loosely coupled systems is applied to describe multidisciplinary collaboration in healthcare. It is further argued that tools employed in collaborative activities may be regarded as object components of such a system. Drawing on observational studies and interviews of a...
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PMID: 20001545
PDF is available here.
Abstract
Communication and teamwork problems are leading causes of documented preventable adverse outcomes in perinatal care. An essential component of perinatal safety is the organizational culture in which clinicians work. Clinicians' individual and collective authority to question the plan of care and tak...
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PMID: 20147827
PDF is available here.
Abstract
Perinatal nurses work with intricate systems requiring frequent interface with complex technology. This interplay is strongly influenced by the work environment and systems operations. The interplay among worker, technology, and the environment increases the risk of medical error, adverse patient ou...
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PMID: 20147826
PDF is available here.
Abstract
We analyse anticipating synchronization in chaotic systems with time-delay coupling. Two algorithms for extending the prediction horizon are considered. One of them is based on the design of a suitable coupling matrix compensating the phase lag in the time-delay feedback term of the slave system. Th...
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PMID: 20008403
PDF is available here.
Abstract
We give an overview of coupling schemes of Bernoulli units deduced from chaotic laser systems, different ways to transmit information by chaos synchronization and the advantage of bidirectional over unidirectional coupling with respect to secure communication. We present the protocol for using dynam...
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PMID: 20008407
PDF is available here.
Abstract
We quantify the level of stochasticity in the dynamics of two mutually coupled semiconductor lasers. Specifically, we concentrate on a regime in which the lasers synchronize their dynamics with a non-zero lag time, and the leader and laggard roles alternate irregularly between the lasers. We analyse...
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PMID: 20008406
PDF is available here.
Abstract
We show that in a single FHN system the major time scale of oscillations is strongly influenced by the noise correlation time, which in turn affects the maxima of coherence with respect to the delay time. In two coupled FHN systems, coloured noise input to one subsystem influences coherence resonanc...
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PMID: 20008408
PDF is available here.
Abstract
Alzheimer's disease has a negative impact on family relationships and may trigger conflicts between the main caregiver and other family members. The systemic approach evidences the impact of dementia on structural and functional characteristics of the family system. Systemic family therapy is especi...
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PMID: 20031507
PDF is available here.
Abstract
Primary care is increasingly geared toward standardized care and decision-making for common chronic conditions, combinations of medical and mental health conditions, and the behavioral aspects of care for those conditions. Yet even with well-integrated team-based care for health conditions in place,...
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PMID: 20047353
PDF is available here.
Abstract
This study examined whether (a) therapist behaviors thought to enhance family treatment predicted caregiver in-session responses, and (b) caregiver race, racial match between caregiver and therapist, and family financial hardship moderated the relationships between therapist and caregiver behavior....
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PMID: 19803599
PDF is available here.
Abstract
The relations between 4 sources of family stress (marital dissatisfaction, home chaos, parental depressive symptoms, and job role dissatisfaction) and the emotion socialization practice of mothers' and fathers' responses to children's negative emotions were examined. Participants included 101 couple...
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PMID: 19803603
PDF is available here.
Abstract
How powerful is the status quo in determining people's social ideals? The authors propose (a) that people engage in injunctification, that is, a motivated tendency to construe the current status quo as the most desirable and reasonable state of affairs (i.e., as the most representative of how things...
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PMID: 19685999
PDF is available here.
Abstract
Much of the published human factors work on risk is to do with safety and within this is concerned with prediction and analysis of human error and with human reliability assessment. Less has been published on human factors contributions to understanding and managing project, business...
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PMID: 19562589
PDF is available here.
Abstract
Organisms subject to changing environmental conditions or experimental protocols show complex patterns of responses. The design principles behind these patterns are still poorly understood. Here, modular metabolic control analysis is developed to deal with large changes in branched pathways. Modular...
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PMID: 21592306
PDF is available here.
Abstract
This nonexperimental study used mixed-effects regression models to examine relations among supervisor adherence to a clinical supervision protocol, therapist adherence, and changes in the behavior and functioning of youths with serious antisocial behavior treated with an empirically...
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PMID: 19485583
PDF is available here.
Abstract
The mediators of favorable multisystemic therapy (MST) outcomes achieved at 12 months postrecruitment were examined within the context of a randomized effectiveness trial with 127 juvenile sexual offenders and their caregivers. Outcome measures assessed youth delinquency, substance u...
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PMID: 19485587
PDF is available here.
Abstract
An important problem in neuroscience is to obtain quantitative knowledge of how information is represented, or encoded, in the signals that nerve cells process and transmit. Sensory receptors have provided important models for the study of neural coding because their inputs can often be relatively e...
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PMID: 19153763
PDF is available here.
Abstract
Most bioscientists engage in informal modelling in their research and explicitly document this activity's results in diagrams or "concept maps". While canonical modelling approaches such as Biochemical Systems Theory (BST) immediately allow the construction of a corresponding system of equations, th...
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PMID: 19434549
PDF is available here.
Abstract
Although, recently, the biopsychosocial approach has been emphasized in the practice of family medicine, how psychologists and physicians interact in collaborative family health care practice is still emerging in Portugal. This article describes a qualitative study that focused on the understanding...
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PMID: 19476234
PDF is available here.
Abstract
As systems evolve over time, their natural tendency is to become increasingly more complex. Studies in the field of complex systems have generated new perspectives on management in social organizations such as hospitals. Much of this research appears as a natural extension of the cross-disciplinary...
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PMID: 19590464
PDF is available here.
Abstract
Throughout history, vestibular and emotional dysregulation have often manifested together in clinical settings, with little consideration that they may have a common basis. Regarding vestibular mechanisms, the role of brainstem and cerebellar structures has been emphasized in the neu...
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PMID: 19254081
PDF is available here.