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The purpose of this article is to investigate certain aspects, problems and benefits from the migration to a shared Library Management System (LMS).

A review of the literature and a quantitative survey was conducted, based on a structured questionnaire, with a response rate of 44.7%.

Among the crucial issues that should be taken seriously into consideration when transiting into a new and shared LMS, are the audit of the data quality before migration, the employees' training design and the composition of the LMS central support team. The benefits of a shared LMS are mainly effectiveness in terms of libraries' budgets and time for the employees' day-to-day work.

The survey presented in this article evaluates the merits of a shared LMS and contributes innovative aspects to the existing bibliography by investigating issues and problems that arose during the transition. This way, the professionals involved in similar initiatives will benefit by avoiding possible mistakes and drawbacks when implementing such a project.

The study aims to explore Greek libraries’ social media presence and library operation and social media use during the coronavirus disease 2019 (COVID-19) lockdown.

Primary data were collected via an online questionnaire that was distributed to the Greek libraries. The final sample comprised 189 libraries of all types with the exception of school libraries.

Results indicated that Facebook is the most widely used platform, while social media are mainly used for sharing announcements about library operations and for the promotion of events. During the COVID-19 lockdown, libraries responded quickly to the new circumstances by taking many of their services online. However, they did not fully use social media for service provision but rather used social media as a static communication channel. Only a few of the libraries grasped the opportunity to highlight their role in the promotion of public health by providing timely and reliable information.

Library leaders who are looking to harness the power of social media for service promotion and outreach should build a strategy that takes platform popularity, current social media trends, patron preferences and the specific promotional objectives of their library into consideration.

To the best of the authors’ knowledge, the current research is the first which attempts to explore the social media presence of Greek libraries of all types and changes made to library operations and social media use in response to the COVID-19 lockdown.

This paper's aim it to analyze added value that the theses e‐submission system (tool) gave to the NTUA IR service.

The paper describes the e‐submission tool, its procedures and evaluates its use.

The tool improved the IR service, which can be certified by the continuing evaluation process. This process produced the following main results: the automated batch importing feature should be integrated into the e‐submission system; IR service tutorials should be given to the secretariats, faculty and students; and in‐house service marketing should be conducted.

The present study provides a starting‐point for further research in DL open source software.

The paper shows that the tool helped NTUA users in submitting their e‐theses, and the IR staff in organizing efficiently the service workflow and the data integration into the DSpace system. The process weaknesses rectifications will enhanse the service and allow its broadness to all NTUA departments. This tool implementation may start a debate to the DSpace community in using proxies between DSpace platform and the end user, as an alternative.

This paper aims to propose a toolset that enables individual digital collections owners to satisfy the requirements of aggregators even in cases where their IT and software infrastructure is limited and does not support them inherently. Managers of repositories/digital collections face the challenge of exposing their data via Open Archives Initiative – Protocol for Metadata Harvesting (OAI-PMH) to multiple aggregators and conforming to their possibly differing requirements, for example on output metadata schemas and selective harvesting.

The authors developed a software server that is able to wrap existing systems or even metadata records in plain files as OAI-PMH sources. They analysed the functionality of OAI-PMH data providers in a flow of discrete steps and used a software library to modularise the software for these steps so that the whole process can be easily customised to the needs of each pair of OAI-PMH data provider and service provider. The developed server includes a mechanism for the implementation of schema mappings using an XML specification that can be defined by non-IT personnel, for example metadata experts. The server has been applied in various real-life use cases, in particular for providing content to Europeana.

It has been concluded through real-life use cases that it is indeed possible and feasible in practice to expose metadata records of digital collections via OAI-PMH even when the data sources do not support the required protocols and standards. Even advanced OAI-PMH features like selective harvesting can be supported. Mappings between input and output schemas in many practical cases can be implemented entirely or to a large extent as XML specifications by metadata experts instead of software developers.

Exposing data via OAI-PMH to aggregators like Europeana is made feasible/easier for digital collections owners, even when their software infrastructure does not inherently support the required protocols and standards.

The approach is original and applicable in practice to diverse technology environments, effectively addressing the indisputable fact of the heterogeneity of software and systems used to implement digital repositories and collections worldwide.

In the present study, an effort has been made to estimate the effect of significant parameters on the vulnerability of steel reinforcement to corrosion, using both impressed current density technique and Tafel extrapolation method.

Five sets of tests were performed. Corrosion vulnerability of various diameters, temperature and pH effect on the corrosion process, potential corrosion tendency after a precorrosion period and declination from the theoretical damage prediction model are some of the parameters examined

The results of the tests provide useful information on the main parameters, determining the quality of the corrosion damage.

The originality of the present study is the fact that an effort has been made to estimate the effect of significant parameters on the vulnerability of steel reinforcement to corrosion, using both impressed current density technique and Tafel extrapolation method. Interesting conclusions emerged.