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The UML model consists of several types of diagrams representing different aspects of the modeled system. To assure the universality and flexibility, the UML involves only a few general rules about dependence among different types of diagrams. In consequence people can have the different methodologies based on the UML, but in the same time we haven't the formal tool for assure the vertical cohesion of created model. To test and reach the vertical cohesion of the model some auxiliary information about the relations among the elements belonging to different types of diagrams should be remembered. In this chapter the authors present the method of formal representation of such information in a form of the relation, called Accomplish Relation. This method is based only on the UML properties and is independent from any methodology. Additionally, they show how to use the UML timing diagrams for representing the users' requirements in association with use cases. To illustrate the usefulness of this approach we present how it can be used for load balancing of distributed system in case of a Reporting Systems based on Data Warehouse concept.

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The COVID-19 pandemic forced universities to rapidly switch to distance learning, while simultaneously accelerating changes that might facilitate a more inclusive model of education. The goal of the research was to investigate the multi-dimensional aspects of learning online, including students' gender, age, and culture. The research results, based on 1562 survey responses from Polish and Ukrainian students, suggest that there are still differences between men and women as far as digital competences are concerned that might have their background in the traditional perception of gender roles. Besides, the pandemic has accelerated the processes of hardware and software enhancement in order to facilitate online learning, especially in Ukraine, which is mitigating technological exclusion. The possibility of accessing learning resources online, might allow people with lower economic status or women to continue education. The research results might be helpful in the development of future educational policies at Polish and Ukrainian universities.

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