Mathematical modeling of level of anaesthesia from EEG measurements

Problem of modeling of anaesthesia depth level is studied in this Master Thesis. It applies analysis of EEG signals with nonlinear dynamics theory and further classification of obtained values. The main stages of this study are the following: data preprocessing; calculation of optimal embedding parameters for phase space reconstruction; obtaining reconstructed phase portraits of each EEG signal; formation of the feature set to characterise obtained phase portraits; classification of four different anaesthesia levels basing on previously estimated features. Classification was performed with: Linear and quadratic Discriminant Analysis, k Nearest Neighbours method and online clustering. In addition, this work provides overview of existing approaches to anaesthesia depth monitoring, description of basic concepts of nonlinear dynamics theory used in this Master Thesis and comparative analysis of several different classification methods.

[Bokrecension]

Kirjallisuusarvostelu

Sähköisen taloushallinnon kehitys ja ilmiön näkyvyys alan ammattilehtikirjoittelussa

Pro gradu –tutkielman ensisijaisena tavoitteena on tutkia sähköisen ta-loushallinnon kehitystä ja miten se on näkynyt alan suomalaisessa ja kansainvälisessä ammattilehtikirjoittelussa vuosina 1997 – 2013. Tarkoi-tuksena on löytää kirjoittelun perusteella sähköisen taloushallinnon kehi-tyksen edistäviä ja hidastavia tekijöitä sekä minkälaisia tulevaisuuden näkymiä artikkelit luovat sähköiselle taloushallinnolle. Lisäksi tavoitteena on löytää yhtäläisyyksiä ja eroja kansallisen ja kansainvälisen kirjoittelun välillä. Tutkielma on laadullinen tutkimus ja tutkimusmenetelminä käytetään si-sällönanalyysia, sisällönerittelyä, teemoittelua ja vertailevaa tutkimusta. Tutkielman empiirinen aineisto koostuu Tilisanomien, Balanssi–lehden ja Accountancy–lehden sähköistä taloushallintoa koskevista artikkeleista aikavälillä 1997 – 2013. Tutkimustulosten perusteella sähköisen taloushallinnon kehityskulku näkyy myös ammattilehtikirjoittelussa. Tietojärjestelmät ja niiden käytön mahdollistava lainsäädäntö ovat sähköisen taloushallinnon perusedelly-tykset. Suurimpia kehityksen edistäjiä ovat julkinen valta, verkkolaskut ja standardointi. Kehityksen hidastajina nähdään yhtenäisten standardien puute ja asenteet. Sähköisen taloushallinnon tulevaisuuden näkymiä ovat standardoidut prosessit ja käsitteet koko taloushallinnon alueella sekä viranomaisraportointi XBRL-kielen avulla. Suurimmat erot kansalli-sessa ja kansainvälisessä kehityksessä on havaittavissa verkkolaskuissa ja XBRL-raportoinnissa. Johtopäätöksenä todetaan että kirjoittelun perusteella voidaan löytää sähköisen taloushallinnon kehitystä hidastavia ja edistäviä tekijöitä ja se luo viitteitä tulevaisuuden kehitykselle. Sähköinen taloushallinto kehittyy kunkin maan valtiovallan tahtotilan ja lainsäädännön mukaan. Jatkotut-kimuskohteena tutkielmaa voisi laajentaa kansainvälisemmäksi ottamalla mukaan tarkasteluun useampia kansainvälisiä lehtiä ja kansainvälistä lainsäädäntöä.

Kirjallisuutta

Kirjallisuusarvostelu

La traduzione della letteratura per l’infanzia dal finlandese all’italiano: l’esempio degli albi illustrati di Mauri Kunnas

Despite the increasing number of research on translating for children, no study has so far taken into consideration the translations of children’s literature from Finnish into Italian. This dissertation sets out to fill this gap with a comparative study of Finnish picturebooks and their translations into Italian. Besides being the first research in the field analysing the shifts between these two systems, the study thoroughly investigates the characteristics of the translation process of picturebooks. The works chosen as case study are the Finnish picturebooks by Mauri Kunnas and their Italian translations from the period 1979-2009 because they are characterized by a high number of linguistic and cultural complexities which challenge translators’ skills and knowledge. The dissertation establishes whether and how culture-specific elements (anthroponyms, toponyms, food and allusions) and the word-image interaction have a significant impact on the quality and the nature of the target works, and also whether these aspects are still consistent after the translation and the adaptation process to the target system. Since picturebooks are multimodal texts whose message is produced by both the verbal and the visual, it has been necessary to use a multimodal comparative analysis. Such a descriptive comparative study has allowed me to describe the textual and cultural manipulations undergone by Kunnas’s picturebooks translated into Italian. Indeed, it has helped to identify what kind of shifts occur when cultural specific elements are transferred from the source system to the target one, to determine the most frequent translation strategies used to ensure a higher degree of readability, and to establish whether particular translation choices have contributed to modify the word-image interaction. The results of the multimodal comparative analysis have shown that Italian translators have been deeply influenced by the preponderance of the illustrations and for this reason they have often verbalised the visual and added information not originally contained in the source written text. Moreover, the findings of the analysis together with the interviews to the Italian translator and publishing house have also demonstrated that the latter aimed at producing works “good for the child” – and at the same time “good for the adult” – and at minimizing Finnish cultural specificity, even to the detriment of the aesthetic nature of the original picturebooks.

Extended hydrogen photoproduction by nitrogen-fixing cyanobacteria

Cyanobacteria are the only prokaryotic organisms performing oxygenic photosynthesis. They comprise a diverse and versatile group of organisms in aquatic and terrestrial environments. Increasing genomic and proteomic data launches wide possibilities for their employment in various biotechnical applications. For example, cyanobacteria can use solar energy to produce H2. There are three different enzymes that are directly involved in cyanobacterial H2 metabolism: nitrogenase (nif) which produces hydrogen as a byproduct in nitrogen fixation; bidirectional hydrogenase (hox) which functions both in uptake and in production of H2; and uptake hydrogenase (hup) which recycles the H2 produced by nitrogenase back for the utilization of the cell. Cyanobacterial strains from University of Helsinki Cyanobacteria Collection (UHCC), isolated from the Baltic Sea and Finnish lakes were screened for efficient H2 producers. Screening about 400 strains revealed several promising candidates producing similar amounts of H2 (during light) as the ΔhupL mutant of Anabaena PCC 7120, which is specifically engineered to produce higher amounts of H2 by the interruption of uptake hydrogenase. The optimal environmental conditions for H2 photoproduction were significantly different between various cyanobacterial strains. All suitable strains revealed during screening were N2-fixing, filamentous and heterocystous. The top ten H2 producers were characterized for the presence and activity of the enzymes involved in H2 metabolism. They all possess the genes encoding the conventional nitrogenase (nifHDK1). However, the high H2 photoproduction rates of these strains were shown not to be directly associated with the maximum capacities of highly active nitrogenase or bidirectional hydrogenase. Most of the good producers possessed a highly active uptake hydrogenase, which has been considered as an obstacle for efficient H2 production. Among the newly revealed best H2 producing strains, Calothrix 336/3 was chosen for further, detailed characterization. Comparative analysis of the structure of the nif and hup operons encoding the nitrogenase and uptake hydrogenase enzymes respectively showed minor differences between Calothrix 336/3 and other N2-fixing model cyanobacteria. Calothrix 336/3 is a filamentous, N2-fixing cyanobacterium with ellipsoidal, terminal heterocysts. A common feature of Calothrix 336/3 is that the cells readily adhere to substrates. To make use of this feature, and to additionally improve H2 photoproduction capacity of the Calothrix 336/3 strain, an immobilization technique was applied. The effects of immobilization within thin alginate films were evaluated by examining the photoproduction of H2 of immobilized Calothrix 336/3 in comparison to model strains, the Anabaena PCC 7120 and its ΔhupL mutant. In order to achieve optimal H2 photoproduction, cells were kept under nitrogen starved conditions (Ar atmosphere) to ensure the selective function of nitrogenase in reducing protons to H2. For extended H2 photoproduction, cells require CO2 for maintenance of photosynthetic activity and recovery cycles to fix N2. Application of regular H2 production and recovery cycles, Ar or air atmospheres respectively, resulted in prolongation of H2 photoproduction in both Calothrix 336/3 and the ΔhupL mutant of Anabaena PCC 7120. However, recovery cycles, consisting of air supplemented with CO2, induced a strong C/N unbalance in the ΔhupL mutant leading to a decrease in photosynthetic activity, although total H2 yield was still higher compared to the wild-type strain. My findings provide information about the diversity of cyanobacterial H2 capacities and mechanisms and provide knowledge of the possibilities of further enhancing cyanobacterial H2 production.

Inventive design and product development of a mechanical element

The thesis is dedicated to enhancement and development of a Mechanism in Company X in order to increase its key parameters and approve its workability. Current Mechanism model is described in details. The basis of various analysis, models and theories that are reflecting the working process of the Mechanism are included in the thesis. According to these three directions of enhancements are chosen: from mechanical, tribological and conceptual points of view. As the result the list of improvements is presented. The new models of Mechanism are built. The efficiency and lifetime value are obtained in accordance with corresponding estimations. The comparative analysis confirms the necessity of conducted changes. Recommendations for the Company X specialists are represented in the thesis. Proposals for deeper research are also suggested.

Siirtohinnoittelun kehitys ja tulevaisuus vuosien 1994–2014 ammattilehtikirjoitusten perusteella

Pro gradu-tutkimuksen tarkoituksena on selvittää, miten siirtohinnoittelun kehitys näkyy ammattikirjoituksissa 20 vuoden aikana sekä mihin suuntaan siirtohinnoittelu on kehittymässä tulevaisuudessa. Mitkä ovat siirtohinnoittelun riskit ja edut tutkimusaineiston perusteella ja minkälaisista näkökulmista siirtohinnoittelusta on 20 vuoden aikana kirjoitettu. Artikkeleista pyritään löytämään, minkälaisia eroja on suomalaisen ja kansainvälisen kirjoittelun väliltä. Tämä on laadullinen tutkimus, jossa käytetään tutkimusmenetelmänä sisällönanalyysia. Tutkimuksessa on sisällönanalyysin mukaisesti luokittelua, teemoittelua sekä vertailua. Tutkimusaineisto koostuu kolmesta lehdestä Verotus, Tilintarkastus-lehti, nykyään Balanssi ja The Accounting Review. Lehdistä on kerätty siirtohinnoittelua käsittelevät artikkelit 20 vuoden ajalta. Tutkimustulosten perusteella näkyy siirtohinnoittelun kehitys sekä kuinka aiheesta on tullut entistä keskeisempi. Siirtohinnoittelu on nyt merkittävässä roolissa kansainvälisessä verotuksessa. Haasteena nähdään markkinaehtoisen hinnan asettaminen oikeaan arvoon. Tärkeänä luokkana nousi siirtohinnoittelun kehittäminen. Myös valtioiden uhka siitä, että siirtohinnoittelun kautta verovaroja siirtyy toisiin valtioihin, oli yksi esiin noussut teema. Johtopäätöksenä voidaan todeta, että siirtohinnoittelu on problemaattinen verotuksen aihe, koska selkeää suoraa siirtohintaa ei aina pystytä antamaan tuotteelle, palvelulle tai rahoitukselle, vaan hinta on veteen piirretty viiva. Siirtohinnoittelua pidetään uhkana valtioiden veropohjan rappeutumiselle, jos sen avulla siirretään varoja alemman verotuksen valtioihin. Konsernit toimivat entistä laajemmin eri valtioissa, joten niiden tavoitteena on suunnitella eri konsernin osien tulosta. Tulevaisuudessa on paljon kehityskohtia ja tarpeita siirtohinnoittelun alueella. Kehitykseen vaikuttavat valtioiden yhteisöveropoliittiset päätökset sekä valtioiden omat lainsäädännöt sekä valtioiden sitoutuminen OECD:n säännöksiin, joiden avulla pyritään yhtenäisiin toimintamalleihin. Jatkossa tutkimusta voisi laajentaa kansainvälisemmäksi sekä vielä syvemmin voisi miettiä myös kehityksen suuntia ja niiden vaikutuksia.

Digital Exhaustion in relation to Video Games – The Consumer Perspective

This thesis regards exhaustion of copyright’s distribution right in intangible transfers of video games. It analyses whether, under the current law of the European Union, the phenomenon of digital exhaustion, especially in relation to games exists. The thesis analyses the consumers’ position in the market for copyright protected goods. It uses video games market as an example of the wider phenomenon of the effect of latest technological developments on consumers. The research conducted for the thesis is mostly legal dogmatic, although also comparative analysis, law and economics and law and technology methods are utilised. The thesis evaluates the effects of the most recent case law of the European Court of Justice to analyse the current state of digital exhaustion. In the analysis of effects that the existence of digital exhaustion has, the thesis uses the consumers’ point of view. The thesis introduces the current state of technology in the field of video games from a legal perspective. Furthermore the thesis analyses the effects on consumers of a scenario that no digital exhaustion exists in the future. Such scenario under the recent European case law at the moment seems realistic. The conclusion of my research is most importantly that the consumer position in the market for digital goods has deteriorated and that the probable exclusion of the exhaustion for digital goods is another piece of evidence of this development. Most importantly however, the state of affairs where no certainty prevails on whether digital exhaustion exists, creates injustice from the consumers’ point of view. Accordingly, acts by EU legislators of the Court of Justice of the European Union are required to clarify the issue.

The role of organization-level factors on informal learning process

This study discusses the nature of informal learning process in business organizations, and the importance of different organization-level factors in this process. The purpose of this study is to understand the role of organization-level factors on informal learning process with three subquestions: how informal learning process takes place in business organizations, what organization-level factors affects informal learning process, and how informal learning process is affected by organizational-level factors. The theoretical background of this study includes literatures on the concept of informal learning, its process, and organization-level factors that can affect informal learning process. The empirical research has been conducted in this study by face-to-face interviews. The interviews were conducted between June and August 2015 in Dhaka, Bangladesh. Thirteen interviews were made with the employees from different hierarchical levels from four freight forwarding MNCs in Bangladesh. Constant comparative analysis has been used to process the collected data until reaching a level of saturation. The empirical research found that all the phases in an informal learning process are not linear and sequential, and the role of organization-level factors on each phase varies with the degree and nature of each factor. In addition, the results also revealed that all the organization-level factors do not interact with each other while playing their role on informal learning process. The findings of this study considerably extend our understanding of the important role of HRD, manager, colleague, culture, and work structure on informal learning process in the workplace. However, future research in different organizational contexts is required to generalize the findings of this study.

Vertaileva tutkimus Yhdistyneen Kuningaskunnan afrikkalaisten alusmaiden sosiaaliturvan tasosta

Tässä pro gradu -tutkielmassa tutkitaan kvalitatiivista vertailevaa analyysia käyttäen seitsemäntoista Yhdistyneen Kuningaskunnan alusmaan sosiaaliturvajärjestelmän tasoa. Tavoitteena oli selvittää, vaikuttaako isäntämaan antama taloudellinen tuki sosiaaliturvajärjestelmän kehittymisessä Tutkimus vastaa tutkimuskentän tarpeeseen kehitysmaiden järjestelmäkehityksen ja rahoituskanavien yhteyden tarkastelulle. Tutkimuksessa esitellään lyhyesti sosiaalipolitiikan ja sosiaaliturvajärjestelmätutkimuksen historiallista kehitystä, alan teorioita sekä viimeaikaista Afrikan sosiaaliturvajärjestelmiä koskevaa tutkimusta ja kansainvälisiä kehitysaputoimijoita. Tilastoaineistojen vertailussa hyödynnetään Charles Raginin kvalitatiivisen vertailevan analyysin keinoja (Qualitative Comparative Analysis, QCA). Maiden vertailussa selitettävinä tekijöinä ovat alusmaiden sosiaaliturvan taso ja köyhyysindeksi. Selittävinä tekijöinä ovat maan pääuskonto, naisten lukutaito, bruttokansantuote, vastaanotetun kehitysavun määrä ja yhteiskunnan vakausindeksi. Tutkimuksen perusteella voidaan todeta, että käytettyjen indikaattorien ja QCA-menetelmän osalta kehitysavun ja alusmaan sosiaaliturvajärjestelmän tason yhteyttä ei pystytä osoittamaan. Näyttäisi kuitenkin siltä että selittävistä tekijöistä naisten lukutaidolla, yhteiskunnan vakaudella sekä bruttokansantuotteella on suotuisa vaikutus maan sosiaaliturvan tasoon. Tutkimuksen kohdentaminen tarkemmin yksittäisten maiden historiaan ja nykytilanteeseen olisi seuraava luonnollinen tutkimuskohde.

Vertaileva tutkimus yhdistyneen kuningaskunnan afrikkalaisten alusmaiden sosiaaliturvan tasosta

Tässä pro gradu -tutkielmassa tutkitaan kvalitatiivista vertailevaa analyysia käyttäen seitsemäntoista Yhdistyneen Kuningaskunnan alusmaan sosiaaliturvajärjestelmän tasoa. Tavoitteena oli selvittää, vaikuttaako isäntämaan antama taloudellinen tuki sosiaaliturvajärjestelmän kehittymisessä Tutkimus vastaa tutkimuskentän tarpeeseen kehitysmaiden järjestelmäkehityksen ja rahoituskanavien yhteyden tarkastelulle. Tutkimuksessa esitellään lyhyesti sosiaalipolitiikan ja sosiaaliturvajärjestelmätutkimuksen historiallista kehitystä, alan teorioita sekä viimeaikaista Afrikan sosiaaliturvajärjestelmiä koskevaa tutkimusta ja kansainvälisiä kehitysaputoimijoita. Tilastoaineistojen vertailussa hyödynnetään Charles Raginin kvalitatiivisen vertailevan analyysin keinoja (Qualitative Comparative Analysis, QCA). Maiden vertailussa selitettävinä tekijöinä ovat alusmaiden sosiaaliturvan taso ja köyhyysindeksi. Selittävinä tekijöinä ovat maan pääuskonto, naisten lukutaito, bruttokansantuote, vastaanotetun kehitysavun määrä ja yhteiskunnan vakausindeksi. Tutkimuksen perusteella voidaan todeta, että käytettyjen indikaattorien ja QCA-menetelmän osalta kehitysavun ja alusmaan sosiaaliturvajärjestelmän tason yhteyttä ei pystytä osoittamaan. Näyttäisi kuitenkin siltä että selittävistä tekijöistä naisten lukutaidolla, yhteiskunnan vakaudella sekä bruttokansantuotteella on suotuisa vaikutus maan sosiaaliturvan tasoon. Tutkimuksen kohdentaminen tarkemmin yksittäisten maiden historiaan ja nykytilanteeseen olisi seuraava luonnollinen tutkimuskohde.

The role of organization-level factors on informal learning process

This study discusses the nature of informal learning process in business organizations, and the importance of different organization-level factors in this process. The purpose of this study is to understand the role of organization-level factors on informal learning process with three subquestions: how informal learning process takes place in business organizations, what organizationlevel factors affects informal learning process, and how informal learning process is affected by organizational-level factors. The theoretical background of this study includes literatures on the concept of informal learning, its process, and organization-level factors that can affect informal learning process. The empirical research has been conducted in this study by face-to-face interviews. The interviews were conducted between June and August 2015 in Dhaka, Bangladesh. Thirteen interviews were made with the employees from different hierarchical levels from four freight forwarding MNCs in Bangladesh. Constant comparative analysis has been used to process the collected data until reaching a level of saturation. The empirical research found that all the phases in an informal learning process are not linear and sequential, and the role of organization-level factors on each phase varies with the degree and nature of each factor. In addition, the results also revealed that all the organization-level factors do not interact with each other while playing their role on informal learning process. The findings of this study considerably extend our understanding of the important role of HRD, manager, colleague, culture, and work structure on informal learning process in the workplace. However, future research in different organizational contexts is required to generalize the findings of this study.

Financial working capital - management and measurement

Unexpected changes in cash flow have started to occur more frequently after the financial crisis. The capital structures of companies have also changed, and financial flexibility as well as flexible asset management have therefore become more important. This thesis aims at presenting financial working capital management, a part of flexible asset management, as a possibility to gain financial flexibility and survive the changes. This thesis operates in the interface of corporate finance, strategic management and management accounting, and it has two main objectives: to examine financial working capital management and to develop measures of financial working capital. The research in this thesis has been conducted using archival research and design science. Qualitative comparative analysis and model building are used to formulate tools and strategies for financial working capital management. The tools are tested with simulations, case studies and statistical analysis. The empirical data is collected from companies listed in the Helsinki Stock Exchange. The results of this thesis indicate that there are several possible financial working capital management strategies. FOCAL matrix is created in the thesis to assist in the selection of a strategy. The results also imply that profitability can be improved by reducing financial working capital, which creates a need to change the financial working capital management strategy. Financial flow cycle, and its modification, is developed in this thesis to measure financial working capital. Financial working capital as a concept is presented in this thesis with an orientation towards the management view. New dimensions have also been produced to financial management and working capital management, while providing a holistic approach to financial flexibility. Financial working capital management strategies are presented to managers and practical tools are provided for decision-making.

Parental and Successor Liability in EU Competition Law Infringements

Under EU competition law, parent companies may be held jointly and severally liable for the competition law infringements committed by their subsidiaries. The possibility of holding parent companies liable demonstrates a significant exception from the idea of separate legal entities. However, it is not the only deviation developed under EU competition law. In cases, where the legal entity responsible for the anti-competitive conduct has changed its form, liability can be attributed to the new operator, in particular, to its successor. The principles of legal certainty and legitimate expectations are issues that surround the doctrines of parental and successor liability. The aim of this thesis is to present a comprehensive comparative analysis of the parental and successor liability doctrines and to clarify the conditions under which it is possible to attribute liability for the infringements of EU competition law. The main purpose is therefore to demonstrate the problems related to the allocation of liability and to discuss whether these liability principles, established to assure the effective enforcement of the EU competition rules, are good solutions. The research methods used in this thesis are the legal dogmatic approach and the comparative law approach. The former enables the possibility of using the case law and legislation as a framework in which the difficulties concerning the application of parental and successor liability can be discussed while the latter ensures the comparison of the characteristics and judgments. The doctrines of parental and successor liability are both well established, but the application practice has caused several difficulties. These problems derive from, inter alia, the broadness and disjointed developed of the doctrines. There has been much recent case law dealing with these issues and having the potential to open up a considerable risk and to allocate strict liability for parent and successor companies.