Phosphorus extractability in surface soil samples as affected by mixing with subsoil

Selostus: Muokkauskerrokseen sekoitetun pohjamaan vaikutus maasta uuttuvan fosforin määrään

The Child Occupational Self Assessment (COSA, version 2.1) : lasten toimintamahdollisuuksien itsearviointi COSA:n esittely ja suomentamisprosessi

Tämän opinnäytetyön tarkoituksena on aloittaa lapsille ja nuorille suunnatun The Child Occupational Self Assessment (COSA, version 2.1) itsearviointimenetelmän suomenkielisen version käännöstyö. COSA on asiakaslähtöinen itsearviointi, jolla kartoitetaan lasten ja nuorten kokemusta toiminnallisesta pätevyydestään ja jokapäiväisten toimintojen tärkeydestä heille. COSA pohjaa Inhimillisen toiminnan malliin ja sen toteutus seuraa asiakaslähtöistä teoriaa. COSA:n avulla voidaan asettaa toimintaterapialle tavoitteet ja tarkastella niiden toteutumista. Työssämme suomennamme arviointimenetelmän nimen muotoon; Lasten toimintamahdollisuuksien itsearviointi COSA. Arviointimenetelmän käännöstyö tehdään Helsingin ammattikorkeakoulu Stadian toimintaterapian koulutusohjelmalle. Opinnäytetyössä esittelemme ensin arviointia ja tavoitteiden asettamista lasten toimintaterapiassa sekä itsearvioinnin käyttämistä arviointimenetelmänä. Esittelemme COSA itsearviointimenetelmän sekä sen taustalla vaikuttavat Inhimillisen toiminnan mallin sisällön ja asiakaslähtöisyyden. Kartoitamme myös The Child Occupational Self Assessment (COSA, version 2.1 )itsearviointimenetelmän kehittymistä, sitä edeltäneitä arviointimenetelmiä ja COSA:sta aiemmin tehtyjä tutkimuksia. Opinnäytetyössä suomennamme COSA:n arviointilomakkeen. Arviointilomakkeessa on 25 lasten ja nuorten toiminnallista pätevyyttä ja jokapäiväisten toimintojen tärkeyttä kartoittava väittämää. Suomentamisprosessissa selvitämme COSA:n arviointilomakkeen väittämien suomennosten ymmärrettävyyden onnistumista kahdeksan käyttökokeiluun ja haastatteluun osallistuvan lapsen avulla. Saimme arviointilomakkeen suomentamisprosessiin apua neljältä lasten kanssa työskentelevältä toimintaterapeutilta sekä koulutusohjelmamme koulutuspäälliköltä. Käyttökokeiluiden sekä toimintaterapeuttien palautteiden avulla viimeistelimme suomennetun arviointilomakkeen väittämät. Opinnäytetyön lopuksi pohdimme arviointilomakkeen suomentamisprosessin vaiheita sekä mahdollisia jatkotutkimusehdotuksia. Luovutimme Lasten toimintamahdollisuuksien itsearviointi COSA:n arviointilomakkeen koulutusohjelmamme käyttöön ja mahdollisten jatkotutkimusten kohteeksi.

ADVANCED NUMERICAL METHODS FOR SIMULATING MICROBUBBLE IN AN AERATED MIXING TANK

Fluid mixing in mechanically agitated tanks is one of the major unit operations in many industries. Bubbly flows have been of interest among researchers in physics, medicine, chemistry and technology over the centuries. The aim of this thesis is to use advanced numerical methods for simulating microbubble in an aerated mixing tank. Main components of the mixing tank are a cylindrical vessel, a rotating Rushton turbine and the air nozzle. The objective of Computational Fluid Dynamics (CFD) is to predict fluid flow, heat transfer, mass transfer and chemical reactions. The CFD simulations of a turbulent bubbly flow are carried out in a cylindrical mixing tank using large eddy simulation (LES) and volume of fluid (VOF) method. The Rushton turbine induced flow is modeled by using a sliding mesh method. Numerical results are used to describe the bubbly flows in highly complex liquid flow. Some of the experimental works related to turbulent bubbly flow in a mixing tank are briefly reported. Numerical simulations are needed to complete and interpret the results of the experimental work. Information given by numerical simulations has a major role in designing and scaling-up mixing tanks. The results of this work have been reported in the following scientific articles: ·Honkanen M., Koohestany A., Hatunen T., Saarenrinne P., Zamankhan P., Large eddy simulations and PIV experiments of a two-phase air-water mixer, in Proceedings of ASME Fluids Engineering Summer Conference (2005). ·Honkanen M., Koohestany A., Hatunen T., Saarenrinne P., Zamankhan P., Dynamical States of Bubbling in an Aerated Stirring Tank, submitted to J. Computational Physics.

CFD study of penetration and mixing of fuel in a circulating fluidized bed furnace

The aim of this thesis is to study the mixing of fuel and, also to some extent, the mixing of air in a circulating fluidized bed boiler. In the literature survey part of this thesis, a review is made of the previous experimental studies related to the fuel and air mixing in the circulating fluidized beds. In the simulation part of it the commercial computational fluid dynamics software (FLUENT) is used with the Eulerian multiphase model for studying the fuel mixing in the two and three-dimensional furnace geometries. The results of the three-dimensional simulations are promising and, therefore suggestions are made for the future simulations. The two-dimensional studies give new information of the effects of the fluidization velocity, fuel particle size and fuel density on the fuel mixing. However, the present results show that three-dimensional models produce more realistic representation of the circulating fluidized bed behavior.

Predicting diffusion of innovations with self-organisation and machine learning

The main subject of this master's thesis was predicting diffusion of innovations. The prediction was done in a special case: product has been available in some countries, and based on its diffusion in those countries the prediction is done for other countries. The prediction was based on finding similar countries with Self-Organizing Map~(SOM), using parameters of countries. Parameters included various economical and social key figures. SOM was optimised for different products using two different methods: (a) by adding diffusion information of products to the country parameters, and (b) by weighting the country parameters based on their importance for the diffusion of different products. A novel method using Differential Evolution (DE) was developed to solve the latter, highly non-linear optimisation problem. Results were fairly good. The prediction method seems to be on a solid theoretical foundation. The results based on country data were good. Instead, optimisation for different products did not generally offer clear benefit, but in some cases the improvement was clearly noticeable. The weights found for the parameters of the countries with the developed SOM optimisation method were interesting, and most of them could be explained by properties of the products.

Development of a Filter Aid Proportioning, Mixing, and Feeding System for a Polishing Filter

The purpose of this work was to study the characteristics of the most commonly used filter aid materials and their influences on the design of proportioning, mixing, and feeding system for polishing filter family. Based on the literature survey and hands-on experience a system was designed with defined equipment and capital and operating costs. The system was designed to serve precoating and bodyfeeding applications and is easily extended to be used in multiple filter processes. Also a test procedure was carried out where influences of flux and filter cloths to accumulated cake were studied. Filter aid is needed in challenging conditions to improve filtration efficiency and cleaning, and thus extend the operating life of the filter media. Filter aid preparation and feeding system was designed for the use of two different filter aids; precoat and bodyfeed. Precoating is used before the filtration step initiates. If the solids in the filterable solution have a tendency to clog the filter bag easily, precoat is used on the filter bag to obtain better filtration efficiency and quality. Diatomite or perlite is usually used as a precoating substance. The intention is to create a uniform cake to the overall surface of the filter cloth, with predetermined thickness, 2 – 5 mm. This ensures that the clogging of the filter cloth is reduced and the filtration efficiency is increased. Bodyfeed is used if the solids in the filterable solution have a tendency to form a sticky impermeable filter cake. The cake properties are enhanced by maintaining the permeability of the accumulating cake by using the filter aid substance as bodyfeed during the filtration process.

Fourier self-deconvolution in coherent anti-Stokes Raman scattering spectrum analysis

Coherent anti-Stokes Raman scattering (CARS) microscopy is rapidly developing into a unique microscopic tool in biophysics, biology and the material sciences. The nonlinear nature of CARS spectroscopy complicates the analysis of the received spectra. There were developed mathematical methods for signal processing and for calculations spectra. Fourier self-deconvolution is a special high pass FFT filter which synthetically narrows the effective trace bandwidth features. As Fourier self-deconvolution can effectively reduce the noise, which may be at a higher spatial frequency than the peaks, without losing peak resolution. The idea of the work is to experiment the possibility of using wavelet decomposition in spectroscopic for background and noise removal, and Fourier transformation for linenarrowing.

Patient education to support self-management of patients with mental illness

This study explores areas which need to be improved to develop the quality of patient education to support self-management of patients with mental illness in psychiatric hospitals. The study was conducted in five phases during the period 2000 – 2007. First, patients‘ (n = 313) satisfaction with patient education were investigated. Second, patients' (n = 51) experiences of patient education were explored. Third, a national survey was conducted to investigate realisation of patient education from the staff (n = 55) viewpoint. Fourth, outcomes of patient education were investigated by evaluating the impacts of different patient education methods on patients‘ (n = 311) attitudes towards medication, knowledge level and importance of information. Fifth, patients‘ (n = 16) perceptions of different patient education methods were explored. Patients reported poor satisfaction with patient education (Phase I), and they have considerable need to receive information during their hospital stay (Phase II). Described by staff, the content of patient education covered almost all informational areas investigated. However, discrepancies related to the realisation of patient education were found. (Phase III.) Evaluation of different patient education methods indicate that patients derived benefits from structured patient education with supportive methods (Phase IV) and patients also perceived that these methods supported their information receiving (Phase V). In order to improve the quality of patient education to support self-management of patients with mental illness patient education should be systematically and individually provided to all patients by using different educational methods. Realisation of this should be ensured by providing written instructions, improving nurses‘ knowledge and skills as well ensuring operating conditions.

Speaking Wounds – Silence, Self-injury and Healing in Patricia McCormick‟s Cut

Pro gradu -tutkielmani käsittelee itsensä vahingoittamisen, hiljaisuuden ja toipumisen representaatioita Patricia McCormickin nuorille aikuisille suunnatussa teoksessa Cut. Tutkielman tarkoituksena on analysoida itsensä vahingoittamista kirjallisuudentutkimuksellisesta näkökulmasta. Vaikka itsensä vahingoittamisesta on englanninkielisillä markkinoilla olemassa runsaasti psykologista kirjallisuutta, ei sen representaatioita kirjallisuudessa ole vielä juurikaan tutkittu. Näiden representaatioiden analysointi on tärkeää, sillä 1990-luvun alkupuolella syntyi nuortenkirjallisuudessa genre, joka keskittyy juuri itsensä vahingoittamisen käsittelyyn. Patricia McCormickin Cut on edustava esimerkki tämän genren romaanista. Tutkimuksen teoreettinen viitekehys koostuu monitieteellisistä teksteistä. Ensisijaisina lähteinä ovat Patrick Fueryn teoreettiset käsitykset hiljaisuudesta ja poissa-olosta sekä Christine Wilkie-Stibbsin feministiset luennat yksittäisistä nuortenkirjoista. Armando R. Favazzan kliiniset määritelmät itsensä vahingoittamisesta luovat perustan käyttämilleni termeille. Pääpaino tutkielmassa on kuitenkin omalla luennallani romaanista. Tutkimustuloksena on, että sekä päähenkilön hiljaisuus että itsensä viiltely ovat monimerkityksisiä ja dynaamisia tiloja. Ne toimivat kommunikaation ja itsehoidon välineinä. Viiltelyyn sisältyy voimakkaasti hoivan käsite, sillä viiltämällä itseään päähenkilö yrittää käsitellä ja helpottaa henkistä ahdistustaan. Sekä hiljaisuus että viiltely auttavat eri tavoin päähenkilöä käsittelemään ja sisäistämään oman tilansa ja näin ollen myös edistävät paranemisprosessia, joka jatkuu puheen kautta perinteisessä psykoterapeuttisessa diskurssissa. Teos painottaa puheen roolia, mutta myös hiljaisuus ja viiltely muodostavat yhtäläiset kommunikaatio- ja hoitoväylät.