05. Harjoitustyöt ja kurssitutkielmat / Coursework and Term papers, Final projects

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Yliopistossa suoritettujen opintojen harjoitus- ja lopputöitä / Coursework, term papers and final projects completed at the university

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Browsing 05. Harjoitustyöt ja kurssitutkielmat / Coursework and Term papers, Final projects by Department "Informaatio- ja luonnontieteiden tiedekunta"

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    Demand Driven SCM in Global Business
    (2008) Saldaña Gascón, Jose M.; Jussila, Kari; Informaatio- ja luonnontieteiden tiedekunta; Teknillinen korkeakoulu; Helsinki University of Technology; Eloranta, Eero
    This thesis was developed with the primary objective of demonstrating the potential benefits that can be derived by businesses through making the changes necessary to transform themselves into a Demand Driven Supply Chain Management culture. For companies, this breakthrough sometimes requires significant alterations in organizational strategies and processes, and often requires high levels of commitment and investments. Nevertheless, in this study, we attempt to demonstrate that these changes are necessary for the pursuit of excellence and continued growth in the marketplace. This thesis consists of two parts: A Theoretical Review and an Empirical Study. In the theoretical review, we gather information from a variety of sources in order to reach the saturation of knowledge necessary to establish the basis for this study. Following this, we come to understand the history of supply chain management and follow its evolution to the present. We then examine SCM models currently used by most companies and attempt to anticipate coming trends in SCM. As a result of this theoretical study, we develop a reference model of activities, constituted by nine essential steps, which establish useful guidelines for high performance in the management of supply chains. In the Empirical Study, we move away from the theory obtained through literature and other sources towards results observed in practice. The Empirical Study includes the testing of a model developed through analysis of Nokia, a major corporation with a reputation of supply chain management excellence. This case study allows us to measure the validity and consistency of our reference model. We corroborate the level of applicability of our model by comparing it with the business processes employed by Nokia in its Demand Supply Network (DSN). Finally, by acknowledging that Nokia excels in supply chain management through its DSN, the high levels of corroboration between the company and our model leads us to the conclusion that the reference model developed was successful and has a high degree of validity. Our conclusion, however, is that due to the limited scope of our study, in order to prove the reliability of the model, further research is recommended through testing the model on other companies in a cross-section of business sectors.
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    Energy consumption of cryptographic algorithms and security protocols in Symbian mobile devices
    (2010) Miranda, Pedro; Siekkinen, Matti; Waris, Heikki; Informaatio- ja luonnontieteiden tiedekunta; Perustieteiden korkeakoulu; School of Science; Ylä-Jääski, Antti
    Mobile communications have redefined people communications way. Electronic devices, whereby these communications are established. Have evolved significantly in power, throughput and in new functionalities, but they are still constrained by the battery life-time. This study focuses on this constraint and studies how it is impacted by the use of cryptography and secures protocols, paying attention at the most popular transport-layer security protocol: Secure Socket Layer (SSL). For the study, an experimental setup has been developed consisting in a Nokia N95 Symbian mobile device, a PC running Linux, the use of Nokia Energy Profiler for the energy measurements and the OpenSSL implementation of the SSL protocol for the coding of the client and server test applications. Based on the results, the use of security generates ail overhead that involves a high impact in energy consumption for small transaction sizes, that decreases as the size is increased.
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    Learning sensorimotor abstractions
    (2010) Cordero Marcos, Maria Isabel; Valpola, Harri; Informaatio- ja luonnontieteiden tiedekunta; Perustieteiden korkeakoulu; School of Science; Lampinen, Jouko
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    Parallel query processing for in-memory databases
    (2010) López Rodriguez, Carlos; Wolski, Antoni; Informaatio- ja luonnontieteiden tiedekunta; Perustieteiden korkeakoulu; School of Science; Soisalon-Soininen, Eljas
    In this final project, we present an approach for optimizing and parallelizing the query execution for in-memory database management systems. Our study starts by explaining in detail a query optimizer and introducing the concept of in-memory database. Afterwards, we explain different approaches for achieving parallelism into the query execution. Finally, we provide an experiment to demonstrate the performance improvements achieved with parallelism against the sequential execution.