On core stability and extendability

This paper investigates conditions under which the core of a TU cooperative game is stable. In particular the author extends the idea of extendability to find new conditions under which the core is stable. It is also shown that these new conditions are not necessary for core stability.core stability, stable core, extendability

Characterizing core stability with fuzzy games

This paper investigates core stability of cooperative, TU games via a fuzzy extension of the totally balanced cover of a TU game. The stability of the core of the fuzzy extension of a game, the concave extension, is shown to reflect the core stability of the original game and vice versa. Stability of the core is then shown to be equivalent to the existence of an equilibrium of a certain correspondence.cooperative game, core, stable set, fuzzy coalition, fuzzy game, core stability

A note on apportionment methods

This paper investigates the suitability of apportionment methods based on the idea of preserving the coalition function of the simple game represented by the populations of the states. The results show that an apportionment method which satisfies desirable properties such as population monotonicity, house monotonicity, etc., does not exist. A classification of simple voting games via winning coalitions is also given.apportionment methods, simple games, winning coalitions

Technology shift impacts on the recruitment management triangle

Purpose – This paper investigates the constraints an organisation faces when using recruitment agencies and having to trade-off between the speed of hiring a candidate, the cost of a candidate and the match of the candidate against the job requirements across different job seniorities. We analyse how technology can shift the cost and hiring speed in spite of these constraints. Design/methodology/approach – The research design is exploratory, quantitative and cross-sectional. The study employed a two-factor, unbalanced class Analysis of Variance (ANOVA) including interaction effects to test the difference between the means of the class of interest and a control class. Findings – Our empirical findings confirm that (1) the technological innovation of a recruitment agency marketplace can liberate organisations from their time, cost and quality hiring constraints, accelerating the time to hire by four times and reducing costs by over 12%, and (2) these results hold across varying role seniority levels. Originality/value – This study contributes to the existing literature in three ways: (1) it introduces the recruitment triangle from project management into the recruitment literature; (2) it demonstrates how technological innovations such as recruitment agency marketplaces are able to provide a shift in the constraints posed by the recruitment triangle

Pharmacological Emergency management of Agitation in Children and Young people: protocol for a randomised controlled trial of intraMuscular medication (PEAChY-M)

Introduction: Acute severe behavioural disturbance (ASBD) is a condition seen with increasing frequency in emergency departments (EDs) in adults and young people. Despite the increasing number of presentations and significant associated risks to patients, families and caregivers, there is limited evidence to guide the most effective pharmacological management in children and adolescents. The aim of this study is to determine whether a single dose of intramuscular olanzapine is more effective than intramuscular droperidol at successfully sedating young people with ASBD requiring intramuscular sedation. Methods and analysis: This study is a multicentre, open-label, superiority randomised controlled trial. Young people aged between 9 and 17 years and 364 days presenting to an ED with ASBD who are deemed to require medication for behavioural containment will be recruited to the study. Participants will be randomised in a 1:1 allocation between a single weight-based dose of intramuscular olanzapine and intramuscular droperidol. The primary outcome is the proportion of participants who achieve successful sedation at 1-hour post randomisation without the need for additional sedation. Secondary outcomes will include assessing for adverse events, additional medications provided in the ED, further episodes of ASBD, length of stay in the ED and hospital and satisfaction with management. Effectiveness will be determined using an intention-to-treat analysis, with medication efficacy determined as part of the secondary outcomes using a per-protocol analysis. The primary outcome of successful sedation at 1 hour will be presented as a percentage within each treatment group, with comparisons presented as a risk difference with its 95% CIs. Ethics and dissemination: Ethics approval was received from the Royal Children’s Hospital Human Research Ethics Committee (HREC/69948/RCHM-2021). This incorporated a waiver of informed consent for the study. The findings will be disseminated in a peer-reviewed journal and at academic conferences. Trial registration number: ACTRN12621001238864.Elyssia M Bourke, Meredith L Borland, Amit Kochar, Shane George, Deborah Shellshear, Shefali Jani, Kent Perkins, Doris Tham, Michael Solomon Gordon, Kate Klein, Chidambaram Prakash, Katherine Lee, Andrew Davidson, Jonathan C Knott, Simon Craig, Franz E Babl, On behalf of the Paediatric research in Emergency Departments International Collaborative (PREDICT

Intrinsic monitoring of learning success facilitates memory encoding via the activation of the SN/VTA-Hippocampal loop

Humans constantly learn in the absence of explicit rewards. However, the neurobiological mechanisms supporting this type of internally-guided learning (without explicit feedback) are still unclear. Here, participants who completed a task in which no external reward/feedback was provided, exhibited enhanced fMRI-signals within the dopaminergic midbrain, hippocampus, and ventral striatum (the SN/VTA-Hippocampal loop) when successfully grasping the meaning of new-words. Importantly, new-words that were better remembered showed increased activation and enhanced functional connectivity between the midbrain, hippocampus, and ventral striatum. Moreover, enhanced emotion-related physiological measures and subjective pleasantness ratings during encoding were associated with remembered new-words after 24 hr. Furthermore, increased subjective pleasantness ratings were also related to new-words remembered after seven days. These results suggest that intrinsic-potentially reward-related-signals, triggered by self-monitoring of correct performance, can promote the storage of new information into long-term memory through the activation of the SN/VTA-Hippocampal loop, possibly via dopaminergic modulation of the midbrain

Lessons from the removal of lead from gasoline for controlling other environmental pollutants: A case study from New Zealand

<p>Abstract</p> <p>Background</p> <p>It took over two decades to achieve the removal of leaded gasoline in this country. This was despite international evidence and original research conducted in New Zealand on the harm to child cognitive function and behaviour from lead exposure.</p> <p>Objective</p> <p>To identify lessons from the New Zealand experience of removing leaded gasoline that are potentially relevant to the control of other environmental pollutants.</p> <p>Discussion</p> <p>From the available documentation, we suggest a number of reasons for the slow policy response to the leaded gasoline hazard. These include: (1) industry power in the form of successful lobbying by the lead additive supplier, Associated Octel; (2) the absence of the precautionary principle as part of risk management policy; and (3) weak policymaking machinery that included: (a) the poor use of health research evidence (from both NZ and internationally), as well as limited use of expertise in academic and non-governmental organisations; (b) lack of personnel competent in addressing technically complex issues; and (c) diffusion of responsibility among government agencies.</p> <p>Conclusion</p> <p>There is a need for a stronger precautionary approach by policymakers when considering environmental pollutants. Politicians, officials and health workers need to strengthen policymaking processes and effectively counter the industry tactics used to delay regulatory responses.</p