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- Ricardo Saraiva de Camargo, Gilberto de Miranda, Henrique Pacca Loureiro Luna
- Computers & OR
- 2008

In telecommunication and transportation systems, the uncapacitated multiple allocation hub location problem (UMAHLP) arises when we must flow commodities or information between several origin–destination pairs. Instead of establishing a direct node to node connection from an origin to its destination, the flows are concentrated with others at facilities… (More)

- Henrique Pacca Loureiro Luna, P. Mahey
- Oper. Res. Lett.
- 2000

- Ricardo Saraiva de Camargo, Gilberto de Miranda, Henrique Pacca Loureiro Luna
- Transportation Science
- 2009

- C. D. Randazzo, Henrique Pacca Loureiro Luna
- Annals OR
- 2001

We compare some optimal methods addressed to a problem of local access network design. We see this problem arising in telecommunication as a flow extension of the Steiner problem in directed graphs, thus including as particular cases some alternative approaches based on the spanning tree problem. We work with two equivalent flow formulations for the… (More)

- C. D. Randazzo, Henrique Pacca Loureiro Luna, P. Mahey
- Discrete Mathematics & Theoretical Computer…
- 2001

We have worked with the local access network design problem with two cable technologies. This is an optimization problem in graphs that consists of linking an origin node to a set of terminal nodes which have a flow demand. There are also a set of Steiner or transshipment nodes which do not have demand. Each arc of the graph has two associated costs: a… (More)

- Ig Ibert Bittencourt, Pedro Bispo, +4 authors Henrique Pacca Loureiro Luna
- ICEIS
- 2009

This paper addresses a sustainable supply chain network design problem that arises in the public sector. There is little research being done in mathematical modeling and solutions methods for these problems. The paper describes a mixed-integer 0-1 model (MIP) for solving this sustainable problem in which we have to determine a fixed number of facilities to… (More)

- Geraldo Robson Mateus, Henrique Pacca Loureiro Luna, Adriana Bogliolo Sirihal
- J. Heuristics
- 2000