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Evaluating straddle carrier deployment policies: a simulation study for the Piraeus container terminal

Eleni Hadjiconstantinou, Nang Laik Ma
2009 Maritime Policy & Management  
Hadjiconstantinou and N. L.  ...  Hadjiconstantinou and N. L. Ma Table 8 . 8 System performance for capacity planning (in minutes).  ... 
doi:10.1080/03088830903056991 fatcat:2c26ilxag5bjvir2c4sit46vxe

Design and Implementation of a Pedagogical Framework for the Introduction of Distance Learning Programs at Frederick University

Nikleia Eteokleous, Panayiotis Louca, Christoforos Charalampous, Nicos Valanides, Eleni Hadjiconstantinou, Stefanos Tsorakis, Kostas Kyriacou
2016 Διεθνές Συνέδριο για την Ανοικτή & εξ Αποστάσεως Εκπαίδευση  
Frederick University seized the opportunity granted by the ECPU in June 2012 to introduce new programs of study using the distance learning mode of delivery. In June 2013, two programs of study were successfully evaluated and the University got permission to offer two distance learning programs starting in September 2013: 1) Masters in Business Administration (MBA DL) and 2) Masters in Curriculum and Instruction (Med DL). The E-Learning Committee (ELC) was set up and approved by the Senate in
more » ... ptember 2012 as the unit that has the overall responsibility for the design, development and implementation of the distance learning programs. The current paper primarily presents the pedagogical framework developed by the ELC, which served as the backbone of the design of the above new programs of study, and furthermore, the manner in which various agents involved in this endeavour interacted in order to successfully accomplish the project of design and implement distance learning programs at Frederick University.
doi:10.12681/icodl.644 fatcat:746qlo6ff5hgpljlubyofrd4fa

Optimal stopping for portfolio management

Alexandra Sofia Evangelia Spachis, Nigel Meade, Eleni Hadjiconstantinou
2016
This thesis is concerned with the modelling and algorithmic development of a Stopping Rule Problem (SRP) in the area of Portfolio Management. More specifically, the objective is to provide an exit strategy for an invested portfolio containing one or more assets. The exit strategy aims to protect gains in addition to limiting losses. The thesis focuses on the investment/disinvestment in the portfolio and is not concerned with the composition of the portfolio. A new Finite Horizon SRP, referred
more » ... as the Portfolio Management Problem (PMP), has been proposed that allows future scenarios to be considered in the optimisation of the exit time. The PMP aims at maximizing the expected reward of a Portfolio Manager (PM) through an optimal policy. A Dynamic Programming approach is proposed and the DP algorithm developed is capable of solving real-life problems for short- and long-term trades. The applicability of the PMP is limited to cases where no constraints have been imposed by the PM. In view of adding more realism into the model, a Stop Loss and Target Return has been encapsulated in the formulation of the PMP model and thus, in the optimisation of the exit time. The impact of the model with enhanced managerial capabilities, is a better control of the maximum drawdown which restricts the risk of investment, influencing positively metrics of performance. An efficient tradeoff between computational time and size of problem solved has been developed. The final part of this thesis focuses on a PMP which takes into consideration in a dynamic way the new market information for the determination of the optimal policy for assets exhibiting Mean-reversion (MR). This has been achieved through the insertion of a MR Rule specifically developed for the PMP which quantifies future tendencies of the asset prices based on its varying average. An algorithm dealing with the further additional memory requirements has been developed, capable of solving problems of size identical to the original PMP.
doi:10.25560/33134 fatcat:x5n7dfnp5rgp5ngs4alo36xcsu

Algorithms for deterministic and stochastic project scheduling problems

Evelina Klerides, Eleni Hadjiconstantinou
2010
The work in this chapter has been submitted for publication and is currently under review (Klerides and Hadjiconstantinou 2009).  ... 
doi:10.25560/5537 fatcat:ximoq6n55rc4rd6jrtrxbznj3y

Optimal Planning of Container Terminal Operations

Nang Laik Ma, Eleni Hadjiconstantinou, Imperial Business School
2009
More details relating to these applications can be found in Laik and Hadjiconstantinou (2008) and Ma and Hadjiconstantinou (2009) . -6: Simulation results for 51 test cases for 7-days planning time horizon  ...  Ma and Hadjiconstantinou (2007) considered the combined container assignment and YC deployment model within a single optimisation model.  ... 
doi:10.25560/4282 fatcat:nptyxarxm5agxomplw6lqmy67e

Hybrid metaheuristics for solving multi-depot pickup and delivery problems

Pairoj Chaichiratikul, Eleni Hadjiconstantinou
2016
In today's logistics businesses, increasing petrol prices, fierce competition, dynamic business environments and volume volatility put pressure on logistics service providers (LSPs) or third party logistics providers (3PLs) to be efficient, differentiated, adaptive, and horizontally collaborative in order to survive and remain competitive. In this climate, efficient computerised-decision support tools play an essential role. Especially, for freight transportation, e efficiently solving a Pickup
more » ... and Delivery Problem (PDP) and its variants by an optimisation engine is the core capability required in making operational planning and decisions. For PDPs, it is required to determine minimum-cost routes to serve a number of requests, each associated with paired pickup and delivery points. A robust solution method for solving PDPs is crucial to the success of implementing decision support tools, which are integrated with Geographic Information System (GIS) and Fleet Telematics so that the flexibility, agility, visibility and transparency are fulfilled. If these tools are effectively implemented, competitive advantage can be gained in the area of cost leadership and service differentiation. In this research, variants of PDPs, which multiple depots or providers are considered, are investigated. These are so called Multi-depot Pickup and Delivery Problems (MDPDPs). To increase geographical coverage, continue growth and encourage horizontal collaboration, efficiently solving the MDPDPs is vital to operational planning and its total costs. This research deals with designing optimisation algorithms for solving a variety of real-world applications. Mixed Integer Linear Programming (MILP) formulations of the MDPDPs are presented. Due to being NP-hard, the computational time for solving by exact methods becomes prohibitive. Several metaheuristics and hybrid metaheuristics are investigated in this thesis. The extensive computational experiments are carried out to demonstrate their speed, preciseness and robustness.
doi:10.25560/30647 fatcat:ibh43enqxbawdnhlkvfcszqna4

Editorial

Steve Clarke, Brian Lehaney
2008 OR Insight  
Nang Laik Ma and Eleni Hadjiconstantinou look at the evaluation of container yard operations using discrete-event simulation.  ... 
doi:10.1057/ori.2008.14 fatcat:qzpthxcqvbfkljp62csy6bpstm

Foreword

Paolo Toth
2009 Computational Management Science  
The fourth paper, "A New Path-Based Cutting Plane Approach for the Discrete Time-Cost Tradeoff Problem", by Eleni Hadjiconstantinou and Evelina Klerides, considers the problem of determining discrete time-cost  ... 
doi:10.1007/s10287-009-0114-7 fatcat:6kf6njz6erhqbj2u33g5lefege

Page 6614 of Mathematical Reviews Vol. , Issue 2004h [page]

2004 Mathematical Reviews  
(P-PORTEC; Porto); Hadjiconstantinou, Eleni (4-LNDIC-SB; London) ; Christofides, Nicos (4-LNDIC-SB; London Upper bounds for single-source uncapacitated concave minimum- cost network flow problems.  ... 

Page 9745 of Mathematical Reviews Vol. , Issue 2003m [page]

2003 Mathematical Reviews  
(I-BOLO; Bologna) ; Mingozzi, Aristide (I-BOLO; Bologna) ; Hadjiconstantinou, Eleni (4-LNDIC-MG; London) New upper bounds for the two-dimensional orthogonal non-guillotine cutting stock problem.  ... 

Page 6368 of Mathematical Reviews Vol. , Issue 96j [page]

1996 Mathematical Reviews  
Finally, numerical examples are given.” 96j:90028 90B10 90C35 Hadjiconstantinou, Eleni (4-LNDIC-MG; London); Christofides, Nicos (4-LNDIC-MG; London); Mingozzi, Aristide (I-BOLO; Bologna) A new exact algorithm  ... 

An exact algorithm for higher-dimensional orthogonal packing [article]

Sandor P. Fekete and Joerg Schepers and Jan C. van der Veen
2006 arXiv   pre-print
Acknowledgments We thank Eleni Hadjiconstantinou who provided the data for instances hadchr8 and hadchr12. Thank you to Alberto Caprara for some interesting discussions.  ...  In [30] , the resulting OPPs are enumerated by using the method of Hadjiconstantinou/Christofides.  ...  Columns 3 and 4 give the runtimes as reported by Beasley [3] on a CYBER 855, by Hadjiconstantinou and Christofides [25] on a CDC 7600.  ... 
arXiv:cs/0604045v1 fatcat:lpl2meus7rbbxjxtbyw5vj3oo4

An Exact Algorithm for Higher-Dimensional Orthogonal Packing

Sándor P. Fekete, Jörg Schepers, Jan C. van der Veen
2007 Operations Research  
Acknowledgments We thank Eleni Hadjiconstantinou who provided the data for instances hadchr8 and hadchr12. Thank you to Alberto Caprara for some interesting discussions.  ...  In [30] , the resulting OPPs are enumerated by using the method of Hadjiconstantinou/Christofides.  ...  Columns 3 and 4 give the runtimes as reported by Beasley [3] on a CYBER 855, by Hadjiconstantinou and Christofides [25] on a CDC 7600.  ... 
doi:10.1287/opre.1060.0369 fatcat:wygbe53yuzg4fkove6vef3avmq

Page 2506 of Mathematical Reviews Vol. , Issue Subject Index [page]

Mathematical Reviews  
Baldacci, Roberto (with Hadjiconstantinou, Eleni; Maniezzo, Vittorio; Mingozzi, Aristide) A new method for solving capacitated location problems based on a set partitioning approach.  ...  Hadjiconstantinou, Eleni see Baldacci, Roberto et al., 2002k:90059 Hasan, Merza H. (with Osman, Ibrahim H.; AlKhamis, Talal) A meta-heuristic procedure for the three dimension assignment problem.  ... 

Page 1918 of Mathematical Reviews Vol. 28, Issue Index [page]

Mathematical Reviews  
Hadjiconstantinou, Eleni (with Christofides, Nicos; Mingozzi, Aristide) A new exact algorithm for the vehicle routing problem based on q-paths and k-shortest paths relaxations.  ...  (English summary) Cheng, Peng (with Masuyama, Shigeru) On the importance of each edge using its traffic along shortest paths in a network. 96¢:90009 Christofides, Nicos see Hadjiconstantinou, Eleni; et  ... 
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