The twenty-third issue of Caminhando comes to our readers with slight changes. Inside the journal, after six editions we have returned to a onecolumn format, which makes the inclusion of graphics and images easier and which represents the pattern for the journal size we use. We have also tried to concentrate the information of each article such as title, abstract and keywords in the three languages in a single page and gathered, because of that, all information concerning the authors in alphabetical order at the end of the journal. We have thus made room for one more article. The numbering of the journal has also been changed. For the subscriber who owns the whole collection, this is the third change. Up to issue 16, we used the year and th...