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University of Oulu Repository - Jultika
Institutional Repository
5980 Publications
OpenAIRE 3.0 (OA, funding)
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Detailed data provider information (OpenDOAR)


  • Hash function security:cryptanalysis of the Very Smooth Hash and multicollisions in generalised iterated hash functions

    Abstract In recent years, the amount of electronic communication has grown enormously. This has posed some new problems in information security. In particular, the methods in cryptography have been under much scrutiny. There are several basic primitives that modern cryptographic protocols utilise. One of these is hash functions, which are used to compute short hash values from messages of any length. In this thesis, we study the security of hash functions from two different viewpoints...

    Vieraan kielen opettajan opetustavat suomenkielisen oppilaan opettamisessa

    Tutkimukseni päätavoite on saada selville vieraskielisessä opetuksessa käytettäviä opetustapoja. Lisäksi tutkimus selvittää millaisia opetusstrategioita opettaja käyttää erilaisten oppilaiden/tilanteiden kohdalla sekä millainen on onnistunut/opettava opetustilanne opettajan mukaan vieraskielisessä opetuksessa Vieraskielinen opetus on yksi kielikylpyperiaatteen mukaan annettava kielenopetusmuoto. Vieraskielisessä opetuksessa käytetty CLIL-termi tulee englannin kielen sanoista Content and La...

    Kannettavan XRF-analysaattorin käyttö biogeokemiallisessa malminetsinnässä

    Biogeokemiallisen kartoituksen aineiston keräämisen menetelmät ovat vakiintuneet näytteiden keräämiseksi kasvien oksista, lehdistä, kaarnasta ja karikkeesta. Teknologian kehityksen myötä näytteet voidaan analysoida suoraan kentällä kannettavan XRF-analysaattorin avulla. XRFanalysaattori ei kuitenkaan kerro absoluuttisia pitoisuuksia, vaan tulokset kertovat, varsinkin biogeokemiallisessa näytteenotossa, alkuaineiden suhteista ja malminetsinnän kannalta mahdollisista anomalioista...

    A multi-theoretical perspective on IS security behaviors

    Moody, G (2011)
    Abstract Increasingly, organizations and individuals rely upon technologies and networks more and more. Likewise, these environments are infested with more dangers, which could be avoided if computer users were to follow general security guidelines or procedures. Despite the ever-increasing threat, little research has addressed or explained why individuals purposefully engage in behaviors that make them more vulnerable to these threats, rather than avoiding or protecting themselves from s...

    Recent spatiotemporal changes and main determinants of aquatic macrophyte vegetation in large lakes in Finland

    Abstract During the past half century several large lakes in Finland have experienced notable changes in their ecological condition, induced mainly by water level regulation, eutrophication and land use transformation. The objective of this thesis was the quantification of the spatiotemporal changes of aquatic macrophytes in Finland during the second half of the 1900s. Mapped aquatic macrophyte cover from historic (1947–1963) and present day (1996–2000) aerial photographs, additional macr...
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