ASAP, School of Computer Science
University of Nottingham
Jubilee Campus
Wollaton Road
Nottingham NG8 1BB
United Kingdom

Room: C77
E-mail: psxlja at cs.nott.ac.uk

Luiz Jonatã Pires de Araújo (ARAÚJO, LJP)

I am a Ph.D. Student in the School of Computer Science at the University of Nottingham/UK since 2014, in the Automated Scheduling, Optimisation and Planning Research Group (ASAP). My research has focused on the application of Cutting and Packing methodologies like mathematical modelling and evolutionary algorithms into Additive Manufacturing processes.

Areas of interest: Optimisation; Evolutionary algorithms; Cutting and packing; Three-dimensional Irregular Packing; 3D Printing.

Supervisors

1st supervisor:	Dr. Ender Özcan
Co-supervisor:	Dr. Jason A. D. Atkin
Co-supervisor:	Dr. Martin Baumers

Research

Additive Manufacturing (AM), also known as 3D Printing, is an umbrella term that refers to a set of technologies related to the production of three-dimensional shapes by successively adding horizontal layers of geometry. The benefits of its adoption include the production of complex irregular shapes that can be customized according to user preference and an ability to deposit multiple components concurrently within a build operation. Additional benefits arise through the possibility of precisely estimating build time, raw material utilization, energy consumption and, consequently, total cost.

Considering these characteristics, packing algorithms that are able to handle irregular shapes have been used in the AM workflow in order to determine suitable packing configurations for efficient technology operation.

The effective utilization of the available build volume capacity promotes AM's usefulness as an industrial process by simultaneously reducing the required amount of time, process energy consumption and cost, as well as the number of builds. Therefore, the aim is to conduct scientific research applying AM build volume packing methodologies to increase the efficiency of AM processes by maximizing build volume capacity utilization.

Education

BSc degree in Computer Science from Universidade Federal do Ceará, Computer Science Department, in Brazil, 2006.

Supervisor: Marcelino Pequeno
Programa de Ensino Tutorial (PET)

MSc in Applied Informatics at Universidade of Fortaleza, Applied Informatics Department, in Brazil, 2011.

Supervisor: Placido Pinheiro
Research area: Container loading problem with weight distribution optimization.

Publications

ARAÚJO, LJP, ÖZCAN, E, ATKIN, JAD, BAUMERS, M: Analysis of irregular three-dimensional packing problems in additive manufacturing: a new taxonomy and dataset. International Journal of Production Research: Taylor & Francis. (2018)

ARAÚJO, LJP, ÖZCAN, E, ATKIN, JAD, BAUMERS, M: A part complexity measurement method supporting 3D Printing. 32nd International Conference on Digital Printing Technologies (NIP). Printing for Fabrication 2016 - Materials, Applications, and Processes.

ARAÚJO, LJP, ÖZCAN, E, ATKIN, JAD, BAUMERS, M, TUCK, C, and HAGUE, R: Toward Better Build Volume Packing in Additive Manufacturing: Classification of Existing Problems and Benchmarks. 2015 Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference.

ARAÚJO, LJP; PINHEIRO, PR: Combining Heuristics Backtracking and Genetic Algorithm to Solve the Container Loading Problem with Weight Distribution. In: Soft Computing Models in Industrial and Environmental Applications, 5th International Workshop (SOCO 2010). Springer Berlin Heidelberg, 2010. p. 95-102.

ARAÚJO, LJP, PINHEIRO, PR: Applying Heuristics on Integer Linear Programming for Solving the Container Loading Problem. 42nd Simposio Brasileiro de Pesquisa Operacional. (2010)

ARAÚJO, LJP, PINHEIRO, PR: Applying backtracking heuristics for constrained two-dimensional guillotine cutting problems. In: Information Computing and Applications. Springer Berlin Heidelberg, 2011. p. 113-120.

ARAÚJO, LJP, PINHEIRO, PR: A hybrid methodology approach for Container Loading Problem using Genetic Algorithm to maximize the Weight Distribution of cargo. Chapter of the book 'Real-World Applications of Genetic Algorithms', ISBN 978-953-51-0146-8. (2011) [link]

Courses and conferences

12-16/10/2016, 32nd International Conference on Digital Printing Technologies (NIP). Printing for Fabrication 2016 - Materials, Applications, and Processes. University of Manchester, UK.
10-12/08/2015, Twenty-Sixth Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference (2015)

Slides

NATCOR

09-13/04/2018, Heuristics and Approximation Algorithms, University of Nottingham, UK.
13-17/06/2016, Convex Optimization, University of Edinburgh, UK.
07-11/09/2015, Combinatorial Optimization, University of Southampton, UK.
23-27/03/2015, Stochastic Modelling, Lancaster University, UK.
29/06-03/07/2015, Simulation, Loughborough University, UK.

30/08-03/09/2010, 42nd Simposio Brasileiro de Pesquisa Operacional, Sociedade Brasileira de Pesquisa Operacional (SOBRAPO).
06-08/04/2010, 5^th International Workshop on Soft Computing Models in Industrial Applications (SOCO 2010).

Work Experience

01/09/2014 - present, University of Nottingham
06/06/2005-01/09/2014, Banco do Nordeste do Brasil (Brazilian regional development bank)

Role: Business Intelligence Analyst.
Activities: ETL development using IBM Cognos tools, Requirements Management, creation and management of reports.
Previous activities: System analysis and design, ASP.NET programming, Java programming, Requirements Management in Rational Unified Process (RUP).

01/04/2005-01/06/2005, Iativa Tecnologia e Comunicação

Role: ASP.NET Programmer.
Bolsista CNPq categoria DTI-H.

01/11/2003-28/03/2004, Secrel Soluções

Role: Java Programmer.
Development in framework J2EE Struts based.

01/07/2001-01/06/2003, Universidade Federal do Ceará

Role: Scholarship student in Programa de Educação Tutorial (PET)
Activities: Evaluation, monitoring, researching (supervisor: Dr. Marcelino Pequeno) and acted as social work volunteer, teaching informatics to needy children in poor communities.