9 research outputs found

    Mathematical Programming Solutions In Constrained Optimal Control

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    Many economists are familiar with optimal control as a theoretical tool. However, the ability to empirically solve dynamic problems is limited. This paper introduces to the general Agricultural Economics audience a mathematical programming method which has been used success fully for over four years. The basic idea is a straightforward extension of static programming techniques already familiar to economists

    The impact of SARS-CoV-2 in dementia across Latin America : A call for an urgent regional plan and coordinated response

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    The SARS-CoV-2 global pandemic will disproportionately impact countries with weak economies and vulnerable populations including people with dementia. Latin American and Caribbean countries (LACs) are burdened with unstable economic development, fragile health systems, massive economic disparities, and a high prevalence of dementia. Here, we underscore the selective impact of SARS-CoV-2 on dementia among LACs, the specific strain on health systems devoted to dementia, and the subsequent effect of increasing inequalities among those with dementia in the region. Implementation of best practices for mitigation and containment faces particularly steep challenges in LACs. Based upon our consideration of these issues, we urgently call for a coordinated action plan, including the development of inexpensive mass testing and multilevel regional coordination for dementia care and related actions. Brain health diplomacy should lead to a shared and escalated response across the region, coordinating leadership, and triangulation between governments and international multilateral networks

    Search for supersymmetry at ‚ąös=13 TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector

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    A search for strongly produced supersymmetric particles is conducted using signatures involving multiple energetic jets and either two isolated leptons (e or őľ őľ) with the same electric charge or at least three isolated leptons. The search also utilises b-tagged jets, missing transverse momentum and other observables to extend its sensitivity. The analysis uses a data sample of proton‚Äďproton collisions at ‚ąös=13 TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015 corresponding to a total integrated luminosity of 3.2 fb ‚ąí1. No significant excess over the Standard Model expectation is observed. The results are interpreted in several simplified supersymmetric models and extend the exclusion limits from previous searches. In the context of exclusive production and simplified decay modes, gluino masses are excluded at 95% 95% confidence level up to 1.1‚Äď1.3 TeV for light neutralinos (depending on the decay channel), and bottom squark masses are also excluded up to 540 GeV. In the former scenarios, neutralino masses are also excluded up to 550‚Äď850 GeV for gluino masses around 1 TeV

    Mathematical Programming Solutions In Constrained Optimal Control

    Get PDF
    Many economists are familiar with optimal control as a theoretical tool. However, the ability to empirically solve dynamic problems is limited. This paper introduces to the general Agricultural Economics audience a mathematical programming method which has been used success fully for over four years. The basic idea is a straightforward extension of static programming techniques already familiar to economists.</p

    [The effect of low-dose hydrocortisone on requirement of norepinephrine and lactate clearance in patients with refractory septic shock].