1,721,058 research outputs found
An extension of Hu's group minimization algorithm
No full textIn this work the Author extends Hu's algorithm to solve pure integer linear programming problems.
The extension is applied when the solution of the «relaxed asymptotic» problem is unfeasible for the original program. This extension provides a mean of solution in a good number of cases, when the application of the classical asymptotic algorithm fails.
Numerical examples are presented.
A criterion, which guarantees when the algorithm works, is also given.
In questo lavoro si estende l'algoritmo di Hu per risolvere problemi di programmazione lineare totalmente a variabili itere.
L'estensione si applica nei casi in cui la soluzione del problema «asintotico rilassato» fornisce una soluzione inaccettabile per il problema originario.
In questo modo, un buon numero di casi, in cui l'algoritmo asintotico non giunge alla soluzione ottima, possono essere risolti. Viene anche indicato un criterio che assicura l'uso dell'algoritmo qui proposto
Sull'uso dell'algoritmo asintotico in problemi applicativi di programmazione lineare a variabile intere
No full textImpatti organizzativi: cosa significa la telemedicina nei reparti, nelle professioni e nelle continuità assistenziali
Full text linkAn unresolved conjecture on non maximal planar graphical sequences
No full textAbstractIn this work it is shown that the Euler nonmaximal sequences, 55555555555553 755555555555555555 (more briefly 51331 71517) are not planar graphical, partly proving an unresolved conjecture by Schmeichel and Hakimi
Resolution of financial crises
Full text linkA financial crisis creates substantial wealth losses. How these losses are allocated determines the magnitude of the crisis and the path to recovery. We study how institutions and technological factors that shape default and debt restructuring decisions affect the amplification of aggregate shocks. For sufficiently large shocks, agents renegotiate. This limits the losses borne by borrowers, shutting the amplification mechanism via asset prices. The range of shocks that trigger renegotiation is decreasing in repossession costs and increasing in default costs, if the latter are public information. Private information may induce equilibrium default but, by allowing agents with high default costs to extract a larger haircut, facilitates the recovery. The model is consistent with evidence from real estate markets in the U.S. during the Great Recession; and rationalizes recent changes in U.S. Bankruptcy Code in the wake of the COVID-19 crisis
Gradient-type methods: a unified perspective in Computer Science and Numerical Analysis
Full text linkThis paper presents a general and comprehensive description of Optimization Methods, and Algorithms from a novel viewpoint. It is shown, in particular,
that Direct Methods, Iterative Methods, and Computer Science Algorithms belong to a well-defined general class of both Finite and Infinite Procedures, characterized by suitable descent directions
The healthcare organization in COVID-19 age: An evaluation framework for the performance of a telemonitoring model
Full text linkTelemedicine services (TS) are not only supportive for healthcare professionals, but managers also see them as essential for the provision of an efficient, effective, and sustainable healthcare service. Several systems make TS available in different ways and contexts. However, no commonly accepted framework meets the need to draw conclusions about which TS can efficiently be measured. For this purpose, a framework is proposed in order to define a dynamic method of performance evaluation that can be used to improve the sustainable management of a telemonitoring model for COVID-19 patients. A case study analysis based on the experience of three telemedicine networks in different locations providing telemonitoring services (northern, central, and southern Italy) was performed. A total of four phases (1. Identification of the target population; 2. Identification of health needs; 3. Definition of the operational plan; and 4. Monitoring of the service by indicators), and seven indicators have been identified. Despite the differences raised in the Italian contexts, applying a performance evaluation framework could help the managerial sector to understand if the service is working as intended and what effects the service is producing on the healthcare organization. Considering the long-term field experience, this framework is an easy-to-use tool that will allow healthcare organizations to evaluate the performance of their telemonitoring model, and improve it according to new needs. Providing a healthcare service in an efficient context is fundamental for the sustainability of the health system as a whole
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