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The study aims to propose the use of the semiotics inspection method (SIM) which is an interpretative and qualitative method from semiotics engineering (SE) for the evaluation of the communicability of systems and to evaluate digital libraries and information retrieval systems (IRS). The paper presents the results of the application of this method in the evaluation of the quality of the communicability of the interface and search system of the Coordination for the Improvement of Higher Education Personnel (CAPES) Portal of e-Journals, a major scientific digital library in Brazil. There are proposed solutions to improve this system included.

The study used the SIM to evaluate the system. Two evaluators inspected the system. They performed the comparison and the analysis of three types of metamessages (metalinguistic, static and dynamic). The metamessages generated by the evaluators were contrasted to find inconsistencies and ambiguities in the CAPES Portal of e-Journals. Finally, the last step of the method was the final assessment about the inspection.

The evaluators identified 52 problems of communicability. These problems were ranked according to severity ratings established by Nielsen (1994). They were grouped in ten types of problems present in the interface and in the search system of the CAPES Portal of e-Journals.

This research contributes theoretically to the field of information retrieval and to the area of human–computer interaction and, in particular, to the theory of SE by adapting SE methods that allow the evaluation of communicability to the context of the scientific IRS. Results obtained through scientific methods should contribute to development of the interface and search tools of IRS to better support query formulation and retrieval of relevant information and more efficiently satisfy the information needs of individuals.

The purpose of this paper is to understand the reasons that hinder the use of digital libraries.

This study analyzed data obtained through a web survey sent to 14,763 faculty members in Brazilian universities. Of the 6,689 respondents, 1,075 (16.1%) reported not using the Capes digital library and 1,017 answered the questionnaire for non-users.

Results showed that the main reasons for non-use are lack of knowledge of the existence of the Capes digital library, use of other resources, preference for printed journals and difficulty of access. Eight factors of non-use were elicited: insufficient dissemination, inadequacies in contents, in infrastructure, in access policy, in training and in the interface, personal constraints and personal attitude. The reasons and factors for non-use were categorized as intrinsic and extrinsic to the digital library. Intrinsic reasons relate to characteristics of the Capes digital library. Extrinsic factors are influenced by user characteristics. The chi-square test demonstrated that the variables: area of knowledge, age, hours dedicated to research and computer skills influence non-use.

This study has contributed to research about non-users of digital libraries, differing from previous research by surveying a large-scale population and by investigating in a single work the reasons for non-use, other electronic sources used by non-users, advantages of using the digital library and intention of non-users to become users if barriers were removed. Qualitative data complemented the quantitative data collected which allowed a more complete picture of the respondent’s positions.