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1	Odvozování schématu v NoSQL databázích / Schema Inference for NoSQL Databases Veinhardt Latták, Ivan January 2021 (has links) NoSQL databases are becoming increasingly more popular due to their undeniable advantages in the context of storing and processing big data, mainly horizontal scala- bility and the lack of a requirement to define a data schema upfront. In the absence of explicit schema, however, an implicit schema inherent to the stored data still exists and can be inferred. Once inferred, a schema is of great value to the stakeholders and database maintainers. Nevertheless, the problem of schema inference is non-trivial and is still the subject of ongoing research. We explore the many aspects of NoSQL schema inference and data modeling, analyze a number of existing schema inference solutions in terms of their inner workings and capabilities, point out their shortcomings, and devise (1) a novel horizontally scalable approach based on the Apache Spark platform and (2) a new NoSQL Schema metamodel capable of modeling i.a. inter-entity referential relation- ships and deeply nested JSON constructs. We then experimentally evaluate the newly designed approach along with the preexisting solutions with respect to their functional and performance capabilities. 1
2	Defining Next.Generation Modular Test Systems for Space Computers using Model-Based Systems Engineering : Defining space data handling test system using MBSE Adolfsson, Anton January 2024 (has links) The increasing complexity of systems and the demand for increasing implemented functionalit-ies within the systems necessitate a paradigm shift in development approaches. While traditionalsystems engineering relies heavily on textual documentation, the future calls for a more stream-lined, digital method such as Model-Based Systems Engineering (MBSE). MBSE utilises models tostore data, mitigating textual ambiguity and providing stakeholders with a unified source of inform-ation. Despite its potential, the adoption of MBSE presents challenges because of the need of newpractitioner skill-sets. The thesis investigates the feasibility of implementing an easily adoptable MBSE, using a limitedset of SysML elements and diagrams, approach within the space industry. Through the developmentof guidelines, steps, and goals, a model of an industry-related system is constructed. The createdmodel serves as a demonstration to industry engineers, evaluating the suitability of the proposedguidelines. The thesis concludes the need for maturity of MBSE, its tools, and the need for harmonisationwithin the space industry to establish acceptance among the practitioners. These are the crucialpoints where development and refinements are needed to gain the trust and interest of the end usersof the modelling activities and adopting the proposed methods.i Model-Based MBSE Systems Engineering SE Modelling Modeling Space easily adoptable space data handling space computers SysML abstraction Document-Based DBSE Requirements Information Systems Aerospace Engineering Rymd- och flygteknik Reliability and Maintenance Tillförlitlighets- och kvalitetsteknik

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Odvozování schématu v NoSQL databázích / Schema Inference for NoSQL Databases

Defining Next.Generation Modular Test Systems for Space Computers using Model-Based Systems Engineering : Defining space data handling test system using MBSE