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Aaltodoc Publication Archive
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7073 Publications
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  • The influences of fluctuations in process parameters and end-product inhibition on bacterial stress responses

    The bacterial stress phenomenon is remarkable considering the industrial production organisms but also in prevention of the pathogen growth. Stress can be caused for example by abnormal temperature, pH, metabolic product, osmotic or hydrostatic pressure, lack of substrate, shearing forces, and oxidative radicals. The stress effects are diverse. The stresses occurring in a process can affect productivity, yield, and product quality. A sublethal stress can also improve the strain robustness tow...

    Chain linked lactic acid polymers : polymerization and biodegradation studies

    The two-step polymerization method, including polycondensation and chain linking reactions, was conducted to obtain high-molecular-weight lactic acid polymers. The biodegradability of these polymers was subsequently investigated. Three polymerization routes were studied. Hydroxyl-terminated prepolymers were linked with diisocyanates, 1,6-hexamethylene diisocyanate (HMDI) or 1,4-butane diisocyanate (BDI), to produce poly(ester-urethanes) (PEU). Carboxyl-terminated prepolymers were linked with ...

    ActionPool : a novel dynamic task scheduling method for service robots

    Service robots require the seamless utlisation of several technical disciplines. Most of the required technologies are sufficiently advanced to provide feasible solutions to be used in the designing of service robots. For instance, mechanical engineering, control theory, electronics and electrical engineering aspects of the design have all matured well. On the other hand, it is the perception and artificial intelligence that provide the means for modelling the environment and the knowledge wh...

    Suomen meri– ja järvipelastustehtävät - karttoja ja analyyseja vuosien 2007—2012 tehtävistä

    This report presents a visualization and analysis of the Finnish maritime and lacustrine Search and Rescue (SAR) incidents and response services during the years 2007—2012. The focus is on the activities of the Finnish Lifeboat Institution but also the missions performed by the Finnish Border Guard and the Finnish Rescue Services are shown. This unprecedented integration of data sources provides a comprehensive insight in the SAR incidents and response. The incidents with recreational boating...

    Development of detectors and calibration methods for spectral irradiance and radiometric temperature measurements

    The research work, described in this thesis, has been carried out at the Metrology Research Institute of Helsinki University of Technology between 2000 and 2005. The research focused on the development of new detectors, calibration methods and their applications in optical radiometry. A new photodetector, which is based on three GaAsP Schottky-barrier photodiodes, has been introduced. The spectral properties of the GaAsP trap detector have been studied in the wavelength range between 200 ...
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