Jodelson Sabino's research log

SOBRAPO paper approved!

2009-02-14T10:59:00.003+01:00

The paper submited to SOBRAPO magazine was selected for publications. A few changes are needed. Changes are being done. In a few weeks, the final version will be delivered for printing.

One step to be a doctor

2008-04-03T02:44:00.000+02:00

I was approved in my thesis defense and now I have some time to make the recommended reviews in the thesis text and send the final version to the university. After this last step it will be time to wait for the diploma.

Thesis defense scheduled !

2008-02-25T12:00:00.000+01:00

The committee was set and my PhD Thesis was scheduled for defense in March, 31, 2008.

Paper submitted to SOBRAPO Magazine

2008-02-01T14:16:00.001+01:00

A paper entitled "A MULTI-OBJECTIVE ANT COLONY OPTIMIZATION METHOD APPLIED TO SWITCH ENGINE SCHEDULING IN RAILROAD YARDS", co-authored by José Eugênio Leal, Thomas Sttüzle and Mauro Birattari was submitted to Pesquisa Operacional Magazine (Print ISSN 0101-7438) for publication.

Paper done. Back to YoYo

2007-11-03T11:04:00.000+01:00

The paper on the conclusions about the competANTS recent tests is done and now it is under review from the co-authors. As planned, I am back now with the YoYo program.
Meanwhile I am in permanent contact with my peers in the academic and practitoner worlds to enhance the concepts and approaches in the YoYo algorithm.

One more play with the old fellow

2007-08-14T04:47:00.000+02:00

In order to compare several pheromone update rule, I temporarily interrupted the work on the new YoYo algorithm and I took back my old CompetANTS algorithm and I am currently playing a little bit with it, testing some diffferent rules to check the influence of the instance characteristics and update rules in the quality of the results. After that I plan to write the last paper before the thesis.

Yes: Now it is time to begin the thesis writing

2007-05-30T23:27:00.000+02:00

Now I started doing the writing deliverable of the PhD Thesis. The outline is already planned and I am producing the first paragraphs in paralel with the testing case with SOGY and the the YoYo code finishing.

Review and renew the simulator

2007-05-30T23:23:00.000+02:00

With the help of my friend Otavio Lube, I am producing a new version of the Swith Order Generator program. Now, the new program, called SOGY will generate more accurate and specially formated data to be used as input for the YoYo program, that is about to be born.

Some more runs for the old bud

2007-05-30T23:15:00.000+02:00

I am now doing a new test plan to evaluate the perfomance and tune the parameters of the old RRC program.
With the new results I plan to report on a paper and use it as a benchmark for the YoYo tests to be done in the following steps...

Getting in contact with the "Ant Community"

2006-09-04T23:23:00.000+02:00

This week I am at the ANTS 2006 getting in contact with people from the world who is doing research on ACO, Swarm Intelligence and topics related.

Doing the merge

2006-08-23T20:26:00.000+02:00

Now I am doing the code merge of the old RRC program and the new MDJ program.
The new program will be called YOYO (Yard Operation, Yard Optimization).
Meanwhile I am preparing for delivering the presentation at the ANTS2006.

A new program was born

2006-08-03T20:38:00.000+02:00

I finished coding the shortest path determination program. It is called mdj.
Now I have just started the functionality tests.

Switch engine routing

2006-07-27T20:10:00.000+02:00

Now I have already modeled and designed and I am just coding the shortest path determination program.

Diploma DELF - A2

2006-07-26T22:17:00.000+02:00

I received the Diploma issued by the French Government - Ministry for National Education, Superior Teaching and Research ranking me as level DELF A2 in the official French Proficiency Exams.

Switch Engine routing problem analysis

2006-04-08T21:48:00.000+02:00

I am trying to model the overall railroad yard operations and to tackle the Switch Engine Routing Problem.

Testing SOG and RR-Competants Rank Based

2006-03-23T22:13:00.000+01:00

I am doing some experiments to check the performance of the new Rank Based version of the RR-CompeANTS compared with its basic version.

RR-competANTS version Rank-Based

2006-03-18T10:16:00.000+01:00

I have started making the first variation of the original RR-CompetANTS algorithm. This will be a ranked-based version.

SOG Program is ready

2006-03-14T20:01:00.000+01:00

The Switch Order Generator (SOG) is done! It now runs fast and accurately!

Writing a paper on the currrent stage of my PhD research

2006-03-09T23:04:00.000+01:00

I have started writing a draft of a paper describing the SOG program and the first results gattered from applying the RR_CompetANTS algorithm to a set of SOG generated instances.

Coding a Switch Order Generator (SOG)

2006-03-05T07:23:00.000+01:00

I am coding a C program that simulates a railroad yard routine based on a set of parameters related to yard activity to generate a train arrival and unloading schedule. The schedule is so used to generate the set of switch orders needed to perform the necessary moves. The set of parameters used is conviniently designed to be tunned to match any particular yard operations routine.