857 resultados para Martio, Olli
Resumo:
Kirjallisuusarvostelu
Resumo:
Kirjallisuusarvostelu
Resumo:
Kirjallisuusarvostelu
Resumo:
Kirjallisuusarvostelu
Resumo:
Kirjallisuusarvostelu
Resumo:
Kirjallisuusarvostelu
Resumo:
Object-oriented programming is a widely adopted paradigm for desktop software development. This paradigm partitions software into separate entities, objects, which consist of data and related procedures used to modify and inspect it. The paradigm has evolved during the last few decades to emphasize decoupling between object implementations, via means such as explicit interface inheritance and event-based implicit invocation. Inter-process communication (IPC) technologies allow applications to interact with each other. This enables making software distributed across multiple processes, resulting in a modular architecture with benefits in resource sharing, robustness, code reuse and security. The support for object-oriented programming concepts varies between IPC systems. This thesis is focused on the D-Bus system, which has recently gained a lot of users, but is still scantily researched. D-Bus has support for asynchronous remote procedure calls with return values and a content-based publish/subscribe event delivery mechanism. In this thesis, several patterns for method invocation in D-Bus and similar systems are compared. The patterns that simulate synchronous local calls are shown to be dangerous. Later, we present a state-caching proxy construct, which avoids the complexity of properly asynchronous calls for object inspection. The proxy and certain supplementary constructs are presented conceptually as generic object-oriented design patterns. The e ect of these patterns on non-functional qualities of software, such as complexity, performance and power consumption, is reasoned about based on the properties of the D-Bus system. The use of the patterns reduces complexity, but maintains the other qualities at a good level. Finally, we present currently existing means of specifying D-Bus object interfaces for the purposes of code and documentation generation. The interface description language used by the Telepathy modular IM/VoIP framework is found to be an useful extension of the basic D-Bus introspection format.
Resumo:
Kandidaatintyössä tutustuttiin ydinsukellusveneiden reaktoreiden toimintaperiaatteisiin, ydinsukellusvenekäyttöön sopiviin reaktorityyppeihin ja sukellusvenereaktorin rakenteeseen ja erityispiirteisiin. Ydinsukellusveneiden historiassa perehdyttiin miksi ydinreaktori haluttiin valjastaa ydinsukellusveneen energialähteeksi ja mitä etuja se toi sukellusveneelle. Työn lopussa tutustuttiin ja mietittiin tulevaisuuden mahdollisia rauhanomaisia käyttökohteita ydinsukellusveneille ja sukellusvenereaktoreille. Lyhyesti perehdyttiin myös ydinsukellusveneiden käytöstä poistamiseen ja ydinsukellusveneille sattuneisiin onnettomuuksiin. Onnettomuuksissa perehdyttiin millaisia onnettomuuksia ydinsukellusveneille on tapahtunut ja tutustuttiin muutamaan reaktorionnettomuuteen esimerkkien kautta.
Resumo:
Kirjallisuusarvostelu