This study introduces a method for assessing urban aquatic ecosystem health, combining in-situ and Earth Observation data. Covering 16 stream sites in Coimbra, Portugal, it integrates diverse ecosystem analyses through assessment of the integrity of aquatic communities. This new approach addresses urbanisation, pollution, and climate challenges, surpassing traditional monitoring limits with improved spatial and temporal data, contributing thus to an improved urban aquatic ecosystem management and aiding in sustainable planning and conservation.

This study examines the effects of climate change on Kosynthos and Laspias river basins in Eastern Macedonia and Thrace, Greece, focusing on flooding, pollution, and droughts. It uses Earth Observation and stakeholder engagement to analyse climate impact and propose Nature- based, sustainable mitigation and adaptation strategies. These strategies will promote ecosystem and community resilience, emphasising on the need for integrated approaches in urban planning and environmental management for sustainable, resilient aquatic environments.

The highly competitive global environment of the last few decades has urged companies to rely on Information Systems (IS) in order to improve customer service, reduce costs and increase productivity.In that direction, Enterprise Resource Planning (ERP) systems are being used as significant strategic tools that provide competitive advantages and lead to operational excellence.Despite that, ERP implementation projects are complicated, costly and include high failure risks.The present study aims (a) to develop and (b) empirically test a conceptual framework that investigates the factors affecting ERP system effective implementation in Small and Medium Enterprises (SMEs).The examination of the conceptual framework was made with the use of a newly-developed structured questionnaire that was distributed to a group of Greek SMEs.After the completion of the research period, 159 usable questionnaires were returned.The reliability and the validity of the questionnaires were thoroughly examined, while research hypotheses were tested using the "Structural Equation Modeling" (SEM) technique.Results offer interesting empirical observations and managerial implications.This work was not supported by any organization.According to Garg and Garg [8], this "enables the decisionmaking process to be timely, consistent and reliable across organizational units and geographical locations" (p.424).ERP implementation has various benefits throughout the organisation: elimination of redundant information, drastic declines in inventory, reduction of production cost, better understanding of the changing customer needs, more efficient management of the extended network of suppliers and customers, increased productivity, improved response time, and decreased production cycle [5] [8] [9] [10] [11].Considering these benefits, it is not surprising that ERP systems are being treated as a major development in the world of business, and have been accepted as a standard business software over the last fifteen years [8] [12].However, ERP implementation requires considerable financial resources, while the whole implementation project is considered complex, lengthy, and quite challenging [9] [ 1 3 ] .A s a r e s u l t , t h e s u c c e s s r a t e o f s u c h p r o j e c t s i s considered to be quite disappointing [14] [15] [16].More specifically, Samuel and Kumar [17], argue that the success rate is, only, around 50%, while approximately 90% of ERP implementation projects are late, or over budget.On the same vein, Umble and Umble [18] reported failure rates between 50% and 75%.Therefore, additional empirical studies are necessary in order to assist companies in increasing the success rates of ERP implementation projects.Under that context, the aim of the present study is twofold: (a) develop an original conceptual framework (research model) examining the impact of various research factors on ERP implementation success, (b) empirically test that framework, using data from Small and Medium Enterprises (SMEs) located in Greece (empirical research).(a) The development of the conceptual framework was based on two methodological steps: firstly, a review of the literature identified the factors that were used by previous studies as antecedents of ERP implementation success; secondly, a panel of experts was used in order to discuss these factors and provide a list of the most significant ones.That approach was selected due to the significant number of factors that have been proposed in the relevant literature.More specifically, the members of the research team used the opinions of experienced practitioners as a criterion for selecting a specific set of factors from the extensive list that T Critical success factors for ERP implementation in SMEs

Nowadays, more and more people are using Information and Communication Technologies (ICTs) in order to accommodate their daily needs.E-Government (e-Gov) adopts these technologies in an effort to provide prompt and secure services to citizens.However, the intention to use e-Government services has not yet been fully examined by the international literature.The present research attempts to bridge this gap, by examining the factors affecting citizens' intention to use e-Government services.In that direction, a conceptual framework (research model), based on an extensive review of the relevant literature, has been developed.The proposed conceptual framework has been empirically tested using a newly-developed structured questionnaire.Data were collected from a sample of 547 Greek citizens.The reliability and the validity of the questionnaire have been thoroughly examined, while the Structural Equation Modeling (SEM) technique has been used to analyze the data.Results indicate that perceived usefulness is the most important determinant of the intention to use e-Government services.Other important factors are perceived trust, internet experience, peer influence, computer self-efficacy and perceived risk. Factors affecting the intention to use e-Government services