Edgar G. de Araújo
Accept the challenges so that you can feel the exhilaration of victory.
George S. Patton
I am a self-taught programmer who is driven by challenges and loves to create robust and elegant solutions.
Goal
Field: Software engineering
Motivation: I started programming as a hobby when I got my first computer at the age of 15. And I am improving my programming skills ever since with some formal education (during the technical school and university) and a lot of self-studying. I also did various small software developments at the different places that I worked to help myself or other team members to automate some daily tasks.
Finally, during my work at Ghent University, I got the opportunity to start a large software project involving complex algorithms. For the first time I was working in software development for real, in full-time, and I . This was such a great experience that I’ve decided to fully embrace my carrier as software engineer.
Education
2008 – 2015: Ph.D. in Materials Science, Department of Materials Science and Engineering, Ghent University, Belgium Ph.D. Thesis: Generation of Virtual Microstructures of Materials in Three Dimensions
2000 – 2007: M.Sc. in Metallurgical Engineering, Department of Metallurgical Engineering and Materials, Polytechnic School of University of São Paulo, Brazil Master Thesis: Incubation of Recrystallization on Steel Sheet Submitted to Small Deformation
1995 – 1999: Electronics Technician, Federal Technical School of São Paulo, Brazil
Employment History
- 2015 – now: Software Engineer, Silk, Amsterdam - The Netherlands.
- 2008 – 2015: Materials Science Researcher, Ghent University, Ghent - Belgium.
- Development of software for prior austenite phase reconstruction
- Development of 3D microstructure virtual generator and analysis tools
- Optimization of hot rolling process parameters in electrical steel
- Modeling of magnetic properties in electrical steels
- Teaching assistance of two Bachelor’s and three Master’s courses
- 2007 – 2008: Application Engineer, Magma Engenharia do Brasil, São Paulo - Brazil.
- Development of foundry projects using the numeric simulation software
- Customer relationship management
- Training customers to use the simulation software
- Teaching basic concepts of metallurgy/foundry to small groups of customers
- 2005 – 2007: Scientific Researcher, Instituto de Pesquisas Tecnológicas, São Paulo - Brazil.
- Texture control during heat treatment of electrical steels
- Study of recrystallization mechanism during heat treatment
- 2005 – 2005: Internship, Tenaris Confab (Socotherm Brazil), Pindamonhangaba - Brazil, Pipeline steel manufacturer.
- Process and quality control of the production line (pipe coating)
- Internal quality reports
- 2003 – 2004: Internship, Estação Ciência, São Paulo - Brazil, Museum of science (University of São Paulo).
- Development of didactic devices used in the exposition
- Management of preventive and corrective maintenance of devices
- 1998 – 1998: Electronics Technician, Gradiente Eletrônica S.A., São Paulo - Brazil, Audio and video equipment manufacturer.
- Development of the amplifier stage on audio devices
- Test and homologation of electronic components and products
Programming
Languages and Tools
- Functional: Haskell
- Procedural: C, Python
- OO: Java
- Others: assembler, bash, MatLab, LaTeX and git
- OS: Linux and MacOS
Developed Software
Construo
Software for reconstruction of the prior austenitic phase (only present at elevated temperatures) in steels. Some innovative solutions were introduced in this work:
- Fully automated orientation relationship calculation
- Noise tolerant reconstruction using Markov clustering algorithm
Virmat
It is a platform for 2D/3D microstructure analysis, generation and visualization. It was written from scratch in Haskell (about 10k lines of code) and includes some of the following features:
- Generation of 2D/3D microstructures with arbitrary grain size and orientation distributions
- Smooth surface representation using subdivision surfaces
- Texture and morphological analysis of measured microstructures in 2D/3D
The framework is divided in following parts:
- Virmat, the main program.
- Hammer, basic library with algebraic functions, solvers and graph representations
- DeUni, library for generating Delaunay triangulation, convex hull and Laguerre tesselation in 2D/3D
- SubZero, library for generating Loop subdivision surfaces
Publications
2015
- Fully automated orientation relationship calculation and prior austenite reconstruction by random walk clustering, E. Gomes & L. A. I. Kestens, Materials Science and Engineering, Vol. 82 - No. 1 (2015) [pdf]
2013
- Evolution of the Microstructural Surface Characteristics During Annealing, E. Gomes, K. Verbeken, J. Gautam, & L. A. I. Kestens, Materials Science & Engineering: A, Vol. 561 (2013) pp. 312 - 316. [preprint]
2012
- Virtual 3D Microstructures with Specified Characteristics of State Variable Distributions, E. Gomes, K. Verbeken and L. A. I. Kestens, Materials Science Forum, Vol. 702-703 (2012) pp. 540 - 543. [preprint]
- Through process texture evolution and magnetic properties of high Si non-oriented electrical steels, J. Sidor, K. Verbeken, E. Gomes, J. Schneider, P. R. Calvillo, & L. A. Kestens, Materials Characterization, Vol. 71 (2012) pp. 49 - 57.
2010
- Effect of Hot and Cold Rolling on Grain Size and Texture in Fe-Si Strips with Si-Content Larger than 2 wt%, E. Gomes, J. Schneider, K. Verbeken, H. Hermann and Y. Houbaert, Materials Science Forum, Vols. 638-642 (2010) pp. 3561 - 3566.
- Correlation Between Microstructure, Texture and Magnetic Induction in Non-Oriented Electrical Steels, E. Gomes, J. Schneider, J. Barros, K. Verbeken and Y. Houbaert, IEEE Transactions on Magnetics, Vol. 46, No. 2 (2010) pp. 310 - 313. [preprint]
- Dimensional Effects on Magnetic Properties of Fe–Si Steels Due to Laser and Mechanical Cutting, E. Gomes, J. Schneider, G. Pasquarella, K. Verbeken and Y. Houbaert, IEEE Transactions on Magnetics, Vol. 46, No. 2 (2010) pp. 213 - 216. [preprint]
- Correlation Between the Magnetic Properties and the Crystallographic Texture During the Processing of Non-Oriented Electrical Steel, Kim Verbeken, Edgar Gomes, Jürgen Schneider and Yvan Houbaert, Solid State Phenomena, Vol. 160 (2010) pp. 189-194. [preprint]
- Effects of Intrinsic Material Parameters on the Deterioration of the Magnetic Properties by Laser or Mechanical Cutting, J. Schneider, A. Moreno Fernandez, E. Gomes, M. Schmidtchen, Y.Houbaert, Proceedings of the 6th International Conference on the Physical and Numerical Simulation of Materials Processing, ICPNS’2010, November 16-19, 2010, Guilin, China.
2007
- Incubation of Recrystallization on Sheet Steel Submitted to Small Deformation, Edgar Gomes de Araujo, Fernando José Gomes Landgraf and Nicolau Apoena Castro, Technical contribution to 62 ABM Annual Congress.
2006
- Effect of Sample Preparation Under ODF Obtained by X-Ray Diffraction, Nicolau Apoena Castro, Fernando José Gomes Landgraf, Taeko Yonamine Fukuhara and Edgar Gomes de Araujo, 3rd Workshop of Texture and Orientation Relationships.
Conferences and Symposiums
Oral presentations
- Fully automated orientation relationship calculation and prior austenite reconstruction by random walk clustering, The 17th International Conference on the Textures of Materials – ICOTOM 17, Dresden – Germany, (August 24-29, 2014)
- Virtual 3D Microstructures with Specified Characteristics of State Variable Distributions, The 16th International Conference on the Textures of Materials – ICOTOM 16, Bombay – India, (December 12-17, 2011) [slides]
- Evolution of the Microstructural Surface Characteristics During Annealing, 4th Recrystallization and Grain Growth – ReX & GG IV, Sheffield – UK, (July 4-9, 2010) [slides]
- Effect of Hot and Cold Rolling on Grain Size and Texture in Fe-Si Strips with Si-Content Larger than 2 wt%, 6th International Conference on Processing and Manufacturing of Advanced Materials – THERMEC 2009, Berlin – Germany, (August 25-29, 2009 [slides])
Posters
- Fitting Subdivision Surfaces on Three Dimensional EBSD Maps, The 2nd International Conference on 3D Materials Science – June 29 - July 2, 2014 – Annecy, France [poster]
- Digital Representation of 3D Grain Boundaries using subdivision surfaces, The 1st International Conference on 3D Materials Science – July 8-12, 2012 – Seven Springs, Pennsylvania, USA [poster]
- Induced Stresses at Cutting of Electrical Steels and Their Effects on Magnetic Properties, 4th International Conference of Magnetism and Metallurgy – WMM 2010, Freiberg – Germany, (June 9-11, 2010)
- Correlation Between the Magnetic Properties and the Crystallographic Texture During the Processing of Non-Oriented Electrical Steel, 19th Soft Magnetic Materials Conference – SMM 19, Turin – Italy, (September 6-9, 2009) [poster]
- Dimensional Effects on Magnetic Properties of Fe–Si Steels Due to Laser and Mechanical Cutting, 19th Soft Magnetic Materials Conference – SMM 19, Turin – Italy, (September 6-9, 2009) [poster]