Knowledge Map of Research on Biofuels

This work highlights and analyzes the citations and co-citations by different authors, countries and institutions in series of researches on biofuel. These relations represent a knowledge map which shows the areas of research by different countries and authors. The contributions of different institutions were also shown. With this knowledge map developed, areas of research that still need more attention as well as the most important studies were highlighted. The software used for this analysis is Citespace which is developed by Chaomei Chen. Sources of information are articles retrieved from ISI Web of Science. Biofuel as a renewable form of energy is discussed. Its sources, types, methods of production, effects, market, and producers were discussed. Also plans and strategies that aim at boosting world biofuel market were listed as well as recent researches on it. Knowledge mapping, its types and methods as well as the method and software used for the analysis were also discussed.

Active du/dt Filtering for Variable-Speed AC Drives

An oscillating overvoltage has become a common phenomenon at the motor terminal in inverter-fed variable-speed drives. The problem has emerged since modern insulated gate bipolar transistors have become the standard choice as the power switch component in lowvoltage frequency converter drives. Theovervoltage phenomenon is a consequence of the pulse shape of inverter output voltage and impedance mismatches between the inverter, motor cable, and motor. The overvoltages are harmful to the electric motor, and may cause, for instance, insulation failure in the motor. Several methods have been developed to mitigate the problem. However, most of them are based on filtering with lossy passive components, the drawbacks of which are typically their cost and size. In this doctoral dissertation, application of a new active du/dt filtering method based on a low-loss LC circuit and active control to eliminate the motor overvoltages is discussed. The main benefits of the method are the controllability of the output voltage du/dt within certain limits, considerably smaller inductances in the filter circuit resulting in a smaller physical component size, and excellent filtering performance when compared with typical traditional du/dt filtering solutions. Moreover, no additional components are required, since the active control of the filter circuit takes place in the process of the upper-level PWM modulation using the same power switches as the inverter output stage. Further, the active du/dt method will benefit from the development of semiconductor power switch modules, as new technologies and materials emerge, because the method requires additional switching in the output stage of the inverter and generation of narrow voltage pulses. Since additional switching is required in the output stage, additional losses are generated in the inverter as a result of the application of the method. Considerations on the application of the active du/dt filtering method in electric drives are presented together with experimental data in order to verify the potential of the method.

Conditions for EFL learning and professional development : Finland-Swedish learner and teacher perspectives

Engelskans dominerande roll som internationellt språk och andra globaliseringstrender påverkar också Svenskfinland. Dessa trender påverkar i sin tur förutsättningarna för lärande och undervisning i engelska som främmande språk, det vill säga undervisningsmålen, de förväntade elev- och lärarroller, materialens ändamålsenlighet, lärares och elevers initiala erfarenheter av engelska och engelskspråkiga länder. Denna studie undersöker förutsättningarna för lärande och professionell utveckling i det svenskspråkiga nybörjarklassrummet i engelska som främmande språk. Utgångsläget för 351 nybörjare i engelska som främmande språk och 19 av deras lärare beskrivs och analyseras. Resultaten tyder på att engelska håller på att bli ett andraspråk snarare än ett traditionellt främmande språk för många unga elever. Dessa elever har också goda förutsättningar att lära sig engelska utanför skolan. Sådan var dock inte situationen för alla elever, vilket tyder på att det finns en anmärkningsvärd heterogenitet och även regional variation i det finlandssvenska klassrummet i engelska som främmande språk. Lärarresultaten tyder på att vissa lärare har klarat av att på ett konstruktivt sätt att tackla de förutsättningar de möter. Andra lärare uttrycker frustration över sin arbetssituation, läroplanen, undervisningsmaterialen och andra aktörer som kommer är av betydelse för skolmiljön. Studien påvisar att förutsättningarna för lärande och undervisning i engelska som främmande språk varierar i Svenskfinland. För att stöda elevers och lärares utveckling föreslås att dialogen mellan aktörer på olika nivå i samhället bör förbättras och systematiseras.

Development of research networks : the case of social capital

The aim of this study is to explore how a new concept appears inscientific discussion and research, how it diffuses to other fields and out of the scientific communities, and how the networks are formed around the concept. Text and terminology take the interest of a reader in the digital environment. Texts create networks where the terminology used is dependent on the ideas, viewsand paradigms of the field. This study is based mainly on bibliographic data. Materials for bibliometric studies have been collected from different databases. The databases are also evaluated and their quality and coverage are discussed. The thesauri of those databases that have been selected for a more in depth study have also been evaluated. The material selected has been used to study how long and in which ways an innovative publication, which can be seen as a milestone in a specific field, influences the research. The concept that has been chosen as a topic for this research is Social Capital, because it has been a popular concept in different scientific fields as well as in everyday speech and the media. It seemed to be a `fashion concept´ that appeared in different situations at the Millennium. The growth and diffusion of social capital publications has been studied. The terms connected with social capital in different fields and different stages of the development have also been analyzed. The methods that have been used in this study are growth and diffusion analysis, content analysis, citation analysis, coword analysis and cocitation analysis. One method that can be used tounderstand and to interpret results of these bibliometric studies is to interview some key persons, who are known to have a gatekeeper position in the diffusion of the concept. Thematic interviews with some Finnish researchers and specialists that have influenced the diffusion of social capital into Finnish scientificand social discussions provide background information. iv The Milestone Publications on social capital have been chosen and studied. They give answers to the question "What is Social Capital?" By comparing citations to Milestone Publications with the growth of all social capital publications in a database, we can drawconclusions about the point at which social capital became generally approved `tacit knowledge´. The contribution of the present study lies foremost in understanding the development of network structures around a new concept that has diffused in scientific communities and also outside them. The network means both networks of researchers, networks of publications and networks of concepts that describe the research field. The emphasis has been on the digital environment and onthe socalled information society that we are now living in, but in this transitional stage, the printed publications are still important and widely used in social sciences and humanities. The network formation is affected by social relations and informal contacts that push new ideas. This study also gives new information about using different research methods, like bibliometric methods supported by interviews and content analyses. It is evident that interpretation of bibliometric maps presupposes qualitative information and understanding of the phenomena under study.

Kansainvälisen kaupan arvoketjujen sääntely. Yhteiskuntavastuun ja ennakoivan oikeuden tarkastelua

Tausta Kansainvälinen kauppa on globaalia toimintaa, jossa tavaroiden ja palveluiden tuottaminen ja kuluttaminen on jakautunut maapallon eri osiin. Arvoketjukäsitteellä korostetaan eri toimijoiden panosta lopputuotteen valmistamiseksi, sekä yhteisten tavoitteiden merkitystä. Toimijaverkostot ovat moni-ilmeisiä ja monimutkaisia. Globaalin kaupan toinen tärkeä piirre on yhteiskuntavastuu, joka tulee esiin niin yksityisen kuin julkisen sektorin toiminnassa. Sen toteuttaminen asettaa suuria haasteita sekä yksityisen että julkisen sektorin toimijoille. Kansallisvaltion mahdollisuudet hallita globaaleja kaupan arvoketjuja julkisella sääntelyllä on osoittautunut ongelmalliseksi. Tutkimuskysymykset Tämä tutkimus on oikeustieteen alaan kuuluva sääntelytutkimuksen artikkeliväitöskirja, joka on tutkimusotteeltaan poikkitieteellinen. Tutkimus pyrkii kaikkiaan valaisemaan yksityisen sääntelyn käyttömahdollisuuksia ja rajoituksia elinkeinotoiminnassa. Keskeisessä roolissa oikeustieteen rinnalla on liiketaloustieteen tutkimus. Tutkimuskysymykset ovat ensinnäkin, mistä nousee kansainvälistä kauppaa koskeva yksityisen sääntelyn tarve ja toiseksi, mikä motivoi yrityksiä yksityiseen sääntelyyn tai itsesääntelyyn. Lopuksi pohditaan, miten lainsäätäjän tulisi suhtautua yksityiseen sääntelyyn. Tutkimuskysymyksiin vastaamalla syvennetään ja täsmennetään oikeustieteen piirissä tehtävää tutkimusta ennakoivasta oikeudesta. Menetelmät ja aineistot Tutkimus on oikeusvertaileva tutkimus, jossa pääpaino on yksityisessä sääntelyssä. Tutkimusaineisto nojautuu eri tieteenaloilla tehtyihin sekä kvalitatiivisiin että kvantitatiivisiin empiirisiin sääntelyjärjestelmien käyttöä ja toimivuutta koskeviin tutkimuksiin sekä tutkijan tekemään 42:en, metsäsektorin, elintarvikealan, vaatetusalan sekä vähittäiskaupan piirissä käytössä olevan sääntelyjärjestelmän analyysiin. Johtopäätökset Yksityisen sääntelyn tarve nousee tarpeesta hallita globaaleja arvoketjuja kohti yhteisiä tavoitteita. Tulevan lainsäädännön uhan sijasta yrityksiä motivoi yksityiseen sääntelyyn kilpailuedun tavoitteluun liittyvät tekijät. Koska kilpailuetuun yhä yleisemmin sisältyy yhteiskuntavastuullisuus, ovat yritysten tavoitteet ja julkisen sektorin tavoitteet lähentyneet. Erilaisten kansalaisjärjestöjen rooli kasvaa koko ajan. Ne osallistuvat vahvasti niin yksityisen sääntelyn laadintaan kuin myös sääntöjen valvontaan. Yksityisen sääntelyn tavoitteet ovat aiemmin liittyneet ympäristönsuojelun painottamiseen ja elintarviketurvallisuuteen erityisesti metsäsektorilla ja elintarvikealalla, myöhemmin sosiaalisen vastuullisuuden parantaminen on myös tullut painokkaammin esiin. Kansainvälisen kaupan piirissä syntynyttä yksityisen sääntelyn ilmiötä kuvataan tässä ennakoiva oikeus –käsitteellä. Aiempi tutkimus rajoittui tarkastelemaan ilmiötä vain ennakoivana lähestymistapana oikeuteen. Tässä painopiste on sen sijaan ennakoivan lähestymistavan avulla aikaansaaduissa sääntelyn välineissä ja lopputuloksissa: mahdollistavassa, valtaistavassa, dynaamisessa ja käyttäjäystävällisessä oikeudessa, jonka avulla luodaan mahdollisuuksia, ennalta ehkäistään ja hallitaan riskejä eikä pelkästään ratkaista jo syntyneitä ongelmia. Käsitteen sisältöä avataan tutkimuksessa sekä sääntelyjärjestelmien sisällöllisen tarkastelun että prosessiin liittyvän tarkastelun avulla.

Rural Food System Change in Tanzania during the Post-Ujamaa Era. A Case Study from Western Bagamoyo District

Food systems in Sub-Saharan Africa have been rapidly transforming during the recent decades with diverse outcomes on human development and environment. This study explores the food system change in rural villages in eastern Tanzania where subsistence agriculture has traditionally been the main source of livelihood. The focus is on the salient changes in the spatial dimensions and structural composition of the food system in the context of economic liberalization that has taken place after the end of the socialist ujamaa era in the mid-1980s. In addition, the linkages of the changes are examined in relation to food security, socio-economic situation, livelihoods, and local environment. The approach of the study is geographical, but also involves various multi-disciplinary elements, particularly from development studies. The research methods included thematic and questionnaire interviews, participatory tools, and the analysis of land use/ cover data and official documents. Several earlier studies that were made in the area during the late 1970s and 1980s provided an important reference base. The study shows that subsistence farming has lost its dominant role in food provisioning due to the declining productivity of land, livestock losses, and the increasing shift of labour to non-farm sectors. Also rapid population growth has added to the pressure on land and other natural resources. Despite the increasing need for money for buying marketed foods and other necessities, the nutritional situation shows improvement and severe malnutrition has diminished. However, the long-term sustainability of this transformation raises concerns. Firstly, the food security situation continues to be fragile and prone to shocks such as adverse climatic conditions, crop failures and price hikes. Secondly, the commodification of the food system and livelihoods in general is linked to rapid environmental degradation in the area, particularly the loss of soil fertility and deforestation. The situation calls for efforts that take more determined and holistic approaches towards sustainable development of the rural food system with particular focus on the role and viability of small-scale farming.

Partisaanisodasta alueelliseen puolustusjärjestelmään : jugoslavialaisen sotataidollisen ajattelun kehittyminen toisen maailmansodan jälkeen

Väitöskirjan tavoitteena on ollut rakentaa kokonaiskuva aiheesta Jugoslavialaisen sotataidollisen ajattelun kehittyminen toisen maailmansodan jälkeen. Tutkimuksessa ei ole rajoituttu ainoastaan kuvailemaan sotataidollisen ajattelun kehittyminen, vaan on pyritty selvittämään kehittymiseen vaikuttaneet tekijät ja vastaamaan kysymykseen, miksi näin on tapahtunut? Aiemmat länsimaiset tutkimukset ovat tarkastelleet jugoslavialaista sotataitoa tai maanpuolustusta vain jostain tietystä rajallisesta näkökulmasta, kuten esimerkiksi Jugoslavian kansanarmeijaa, asevoimien vaikutusta maan poliittiseen elämään tai sotilaallista doktriinia koskien. Sotataidon kehittymiseen vaikuttavat tekijät huomioivaa kokonaisesitystä ole tehty. Myös jugoslavialainen sotataidollinen ajattelu on jäänyt pääosin pimentoon. Jugoslavialainen maan sotataitoon kohdistunut tutkimus on ollut laajaa ja monipuolista, mutta sen käytettävyyteen osittain vaikuttaa marxilais-leniniläinen materialistis-dialektinen, historialliseen materialismiin perustuva tutkimusmenetelmä. Väitöskirjan päätutkimusaineiston ovat muodostaneet alkuperäislähteet, ensisijaisesti jugoslavialaiset ohjesäännöt, käsikirjat, oppaat ja oppikirjat. Muu lähteistö on koostunut lähinnä arkistoasiakirjoista ja muusta kirjallisuudesta. Tutkimusmenetelmä on ollut historiatieteellinen käsittäen muun muassa ulkoisen ja sisäisen lähdekritiikin harjoittamisen, tietojen varmistamisen mahdollisimman useasta toisistaan riippumattomasta lähteestä sekä pyrkimyksen rekonstruoida ristiriidaton kokonaiskuva tutkimuskohteesta. Eri lähteistä ja lähderyhmistä saatuja tietoja on vertailtu, analysoitu sekä yhdistetty kriittisesti. Lähteiden käytettävyyden, lähdearvon ja luotettavuuden arviointi ovat olleet merkittävässä roolissa, näistä kaikista tärkeimpänä luotettavuuden arviointi. Sisäisen ja ulkoisen lähdekritiikin keinoin on pyritty luomaan oma ristiriidaton tulkinta kokonaisuudesta, jugoslavialaisen sotataidollisen ajattelun kehittymisestä toisen maailmansodan jälkeen. Tutkimuksessa on pitäydytty niin pitkälle kuin mahdollista jugoslavialaisen sotataidon alkuperäisessä terminologiassa. Jugoslavialaisia termejä ei ole muokattu vastaamaan paremmin esimerkiksi tällä hetkellä länsimaisessa sotataidossa käytettyjä käsitteitä. Väitöskirjan rakenne on temaattinen. Läpi koko tutkittavan ajanjakson jugoslavialaisen sotataidollisen ajattelun kehittymisessä on tunnistettavissa samat määräävät tekijät: historialliset taustatekijät, sotilaallinen uhka, sotilaallinen doktriini, lakiperusteet, kommunistiliiton ohjaus ja asevoimien sekä yhteiskunnan valmiuden kehittyminen. Jugoslaviassa puhuttiin aseelliseen kamppailuun vaikuttavista sodankäynnin faktoreista, joita olivat yhteiskunnalliset tekijät, materiaalis-tekniset tekijät ja sotilaalliset tekijät. Kaikista tärkeimpänä tekijänä pidettiin kuitenkin ihmistä itseään, vaikka ihmisen merkitys välillä tuntuikin hukkuvan ”moraalis-poliittiset tekijät”-sanahirviön alle. Tutkimuskysymyksiin on vastattu sotataitoon vaikuttaneiden edellä mainittujen tekijöiden kautta. Kuhunkin muutostekijään liittyvä kehitys on kuvattu kronologisena esityksenä. Kansan vapautussodassa vuosina 1941–1945 perustettujen partisaaniyksiköiden muodostamisessa sekä niiden toimintamenetelmissä on havaittavissa runsaasti yhtymäkohtia 1700- ja 1800-luvun hajdukkijoukkojen sekä 1800-luvun lopun ja 1900-luvun alun četnikkijoukkojen vastaaviin periaatteisiin. Samankaltaisuuksia ilmenee 1950-luvulta alkaen alueellisen puolustuksen joukkojen ja partisaaniyksiköiden toimintamenetelmien yhteydessä väliaikaisesti menetetyllä alueella toimittaessa. Kansan tukeen, karismaattisiin johtajiin ja yllätyselementtiin perustuva sissitoiminta on perinteistä eteläslaavilaista sotataitoa. Sodanjälkeinen jugoslavialainen sotataito oli jatkumoa eteläslaavien vuosisatoja vanhalle sotataidolliselle perinteelle, vaikka sitä ei julkisesti Jugoslaviassa muutamia poikkeuksia lukuun ottamatta myönnettykään. Jugoslavian sotilaallinen doktriini oli luotu kaikista suunnista kohdistuvia hyökkäyksiä vastaan, mutta sotilaallisen uhkan painotukset vaihtelivat usein, jopa vain muutaman vuoden välein. Tämä ei johtunut päättämättömyydestä eikä pelkästään koetun uhkan suunnan vaihtumisesta. Painottamalla sisäisen ja ulkoisen uhkan jatkuvuutta sekä uhkan suunnan vaihtelua pyrittiin pitämään maanpuolustuspiirit valppaina ja kansalaiset aktiivisina. Tällä tavalla myös perusteltiin maanpuolustuksen korkeita kustannuksia ja ennen kaikkea pyrittiin lisäämään maan sisäistä veljeyttä ja yhtenäisyyttä. On ilmeistä, että sekä lännestä että idästä kohdistui Jugoslavian suuntaan suurta poliittista ja sotilaallista intressiä kylmän sodan vuosina 1945–1990, mutta suoran sotilaallisen uhkan aukoton todistaminen olisi kuitenkin hankalaa. Oleellista onkin jugoslavialaisten oma käsitys maataan vastaan kohdistuneesta sotilaallisesta uhkasta. Sisäisen uhkan vaikutus alkoi kasvaa 1970-luvun alkupuolelta lähtien ja se johti lopulta 1980-luvulla alueellisen puolustuksen joukkojen esikuntien lakkauttamiseen ja taisteluvälineiden hajavarastointijärjestelmän purkamiseen. Yhteiskunnallisista tekijöistä merkittävimpinä sotataitoon ja sotataidolliseen ajatteluun vaikuttaneina osina olivat lait ja Jugoslavian kommunistiliitto. Perustuslakiin ja lakiin kansallisesta puolustuksesta sekä kommunistiliiton päätöslauselmiin sisällytetyt vaatimukset sotataidon kehittymiselle kuitenkin vain toistivat sotilaallisessa doktriinissa määritettyjä suuntaviivoja sekä määräyksiä. Maanpuolustukseen liittyneiden määräysten ja ohjeiden hyväksymiselle laillisen järjestyksen mukaisesti annettiin kuitenkin erittäin suuri arvo. Niiden toimeenpanon leviäminen maanlaajuisesti varmistettiin puolueen päätöksillä velvoittamalla muun muassa kommunistiliiton paikallisorganisaatiot, puoluesolut asevoimien sisällä sekä kaikki liittovaltion hallintotasot tekemään kaikkensa yleisen kansanpuolustuksen ja sitä ilmentävän sotataidon toteutumisen eteen. Materiaalis-teknisen tekijän kokonaisuus sisälsi aseet ja varusteet sekä niihin liittyviä muita seikkoja, kuten yhteiskunnan teollisuuden kehittymisen asteen sekä kyvyn suojautua vihollisen taisteluvälineitä vastaan ja luoda vihollisen aseita vastaan tehokkaampi vasta-ase. Siihen luettiin myös yksilöiden, taktisten ja yhdistettyjen taktisten yksiköiden sekä koko kansan koulutus aseiden ja varusteiden tarkoituksenmukaiseen käyttöön. Vaikka jugoslavialainen aseteollisuus kehittyi tutkimusperiodin aikana voimakkaasti, joutui maa taloudellisten resurssiensa rajallisuuden ja mahdollisen vihollishyökkäyksen ylivoimaisuuden havaittuaan toteamaan, että maanpuolustuksen ongelmia ei voida ratkaista materiaalin ja tekniikan määrällä tai laadulla. Ratkaisun oli löydyttävä sotilaallisista tekijöistä ja varsinkin sotataidosta. Sotilaalliset tekijät ja prosessit olivat jugoslavialaisen sotataidon ja sotataidollisen ajattelun kehittymisen kannalta tärkein muutostekijä. Sotilaallisten tekijöiden ytimen muodosti sotataito, joka Jugoslaviassa koostui teoriasta ja käytännöstä. Tämä jako koski sotataidon kolmea tasoa: strategiaa, operatiikkaa ja taktiikkaa. Sotataitoon kuuluvina osina pidettiin muun muassa taisteluvalmiutta, liikekannallepanovalmiutta, yhteiskunnallis-poliittisten yhteisöjen aseetonta vastarintaa, aseellisen kamppailun operatiivista ja taktista tasoa, materiaalista ja teknistä varustamista, sotatalouden valmistelujen organisointia sekä yhteiskunnallisia palveluja poikkeusoloissa. Osa näistä kuului edellä mainittuihin yhteiskunnallisiin tai materiaalis-teknisiin tekijöihin. Jugoslavialainen sotataito onkin nähtävä matriisinomaisena kokonaisuutena, jossa sotataidon kolmeen toiminnalliseen tasoon, strategiaan, operatiikkaan ja taktiikkaan vaikuttivat historialliset taustatekijät, sotilaallinen uhka, yhteiskunnalliset tekijät ja materiaalis-tekniset tekijät. Jugoslavialaisen sotataidon kokonaisuuteen kuului myös se, että mainitut muutostekijät vaikuttivat vielä toisiinsa. Lopputuloksena näin kokonaisvaltaisesta näkemyksestä sotataitoon ja sotataidolliseen ajatteluun Jugoslavia kykeni luomaan poikkeuksellisen tehokkaana pidetyn puolustusratkaisun, jossa koko yhteiskunnan kaikki resurssit pystyttiin suuntaamaan hyökkäyksen torjumiseen ja maahan tunkeutuneiden pois ajamiseen. Aiempi tutkimus on nähnyt jugoslavialaisen sotataidon kehittymisen keskeisimpänä vaikuttimena ja murroskohtana Varsovan liiton joukkojen toimeenpaneman Tšekkoslovakian miehityksen ja siitä seuranneen koetun uhkan merkittävän voimistumisen. Yleisen kansanpuolustuksen doktriiniin liittyvä taustatutkimus, teorianmuodostus ja doktriinin käyttöönotto tapahtuivat kuitenkin jo 1950-luvulla. Tšekkoslovakian miehitys toimi vain muutoksen toimeenpanoa vauhdittavana tekijänä. Jugoslavialaiset korostivat, että jugoslavialaisessa yhteiskunnassa keskeisessä asemassa ollut yhteisjohtoisuuden periaate ulottui myös maanpuolustukseen ja sotataitoon. Tutkimusaineistoon perehtyminen kuitenkin osoitti, että yleisen kansanpuolustuksen kokonaisuutta kuvaavat oppikirjat, laeissa asetetut määräykset ja Jugoslavian kommunistiliiton julkaisemat vaatimukset eivät olleet jalkautuneet sotataidon teoriaan tai käytäntöön operatiivisella tai taktisella tasolla. Strategisella tasolla yhteisjohtoisuus esiintyi näkyvämmin vain sotilaallisen konseptin ja strategian yhteydessä. Sotilaallisen doktriinin osalta yhteisjohtoisuus ilmeni lähinnä kahdessa asiassa. Alueellisen puolustuksen yksiköiden varustamisvelvoite oli asetettu siviilihallinnon eri tasojen vastuulle. Alueellisen puolustuksen esikunnat ja komentajat olivat vastuussa yleisen kansanpuolustuksen ja yhteiskunnallisen itsesuojelun komiteoille. Siviilihallinnon organisaatioiden kyky varustaa alueellisen puolustuksen yksiköt osoittautui kuitenkin heikoksi. Alueellisen puolustuksen esikunnatkin toimivat upseereiden johtamina sotilaallisina johtoportaina, ja yleisen kansanpuolustuksen ja yhteiskunnallisen itsesuojelun komiteoiden toiminta komentajien ja esikuntien suuntaan rajoittui vain nimelliseen ohjaukseen. Yhteisjohtoisuus osoittautuikin tutkimuksen kuluessa piirteeksi, joka julkisesta retoriikasta huolimatta ei toteutunut jugoslavialaisessa sotataidon praktiikassa. Jugoslavialaisen sotataidollisen ajattelun kehittymisen kaari käynnistyi partisaanisodasta ja päätyi alueelliseen puolustusjärjestelmään. Kansakunta ja sen useat eri kansallisuudet onnistuivat luomaan tieteelliseen ja tutkittuun tietoon perustuvan välineen, sotataidon teorian ja käytännön, joka suojeli maata yli puolen vuosisadan ajan. Yleinen kansanpuolustus sekä jugoslavialainen sotataito ovat toisiensa synonyymejä, seurauksia ja synnyttäjiä. Puolustusratkaisu lähti omista kansallisista lähtökohdista, siihen sulautettiin valikoiden ja jalostettuna hyviksi sekä menestyksekkäiksi koettuja ulkomaisia elementtejä sekä vaikutteita. Sitä perusteltiin monipuolisilla poliittisilla, ideologisilla, teoreettisilla, historiallisilla sekä nykyaikaisilla sotataidollisilla argumenteilla, mutta kaikesta tästä huolimatta sen ydin oli omintakeinen jugoslavialainen sotataidollinen ajattelu.

The role of advance payments in working capital management and profitability

The objective of this thesis is to study the role of received advance payments in working capital management by creating a new measurement and to study the relationship between advance payments and profitability. The study has been conducted using narrative literature review and quantitative research methods. The research was made analyzing 108 companies listed in Helsinki Stock Exchange. The results indicate that 68 % of the studied companies are receiving advance payments and the average cycle time for received advance payments is 13 days. A new key figure is created to include received advance payments into the calculation of working capital. Received advance payments shorten the working capital cycle, by 13 days, when they are used in the calculation. The role of advance payments is not as significant as the role of receivables and inventories but advance payments may have a larger role than payables if the company is receiving noticeable amounts of advance payments. There are three branches where companies are receiving more advance payments than average companies. The branches are project business and ICT and publishing sectors. There is a negative correlation between profitability and advance payments based on the results of this study.

Investointilaskelmien merkitys pienissä ja keskisuurissa yrityksissä -tapaustutkimus

Tutkimuksen tavoitteena oli selvittää, mikä merkitys investointilaskelmilla on kohdeyrityksen investointipäätöksen teossa ja miten epävarmuus investointilaskelmissa voidaan ottaa huomioon. Tutkimus perustuu kvalitatiivisiin eli laadullisiin tutkimusmenetelmiin. Tutkimuksen teoreettinen viitekehys käsittelee investointilaskelmien tuottamaa informaatiota ja millä perusteella yritykset valitsevat investointilaskentamenetelmän yritykseen. Empiirisen osuuden tiedonhankinnassa hyödynnettiin tapaustutkimusta. Tutkimus osoitti, että kohdeyrityksessä koetaan tärkeäksi analysoida investointihankkeita eri arviointimenetelmillä. Yrityksellä on halu kehittää investointilaskentaa perinteisen takaisinmaksuajan menetelmän rinnalle. Myös herkkyysanalyysin merkitys nousi esille.

Biomolecular screening for inhibitors of butyrylcholinesterase : identification and characterization using in vitro and in silico tools

Drug discovery is a continuous process where researchers are constantly trying to find new and better drugs for the treatment of various conditions. Alzheimer’s disease, a neurodegenerative disease mostly affecting the elderly, has a complex etiology with several possible drug targets. Some of these targets have been known for years while other new targets and theories have emerged more recently. Cholinesterase inhibitors are the major class of drugs currently used for the symptomatic treatment of Alzheimer’s disease. In the Alzheimer’s disease brain there is a deficit of acetylcholine and an impairment in signal transmission. Acetylcholinesterase has therefore been the main target as this is the main enzyme hydrolysing acetylcholine and ending neurotransmission. It is believed that by inhibiting acetylcholinesterase the cholinergic signalling can be enhanced and the cognitive symptoms that arise in Alzheimer’s disease can be improved. Butyrylcholinesterase, the second enzyme of the cholinesterase family, has more recently attracted interest among researchers. Its function is still not fully known, but it is believed to play a role in several diseases, one of them being Alzheimer’s disease. In this contribution the aim has primarily been to identify butyrylcholinesterase inhibitors to be used as drug molecules or molecular probes in the future. Both synthetic and natural compounds in diverse and targeted screening libraries have been used for this purpose. The active compounds have been further characterized regarding their potencies, cytotoxicity, and furthermore, in two of the publications, the inhibitors ability to also inhibit Aβ aggregation in an attempt to discover bifunctional compounds. Further, in silico methods were used to evaluate the binding position of the active compounds with the enzyme targets. Mostly to differentiate between the selectivity towards acetylcholinesterase and butyrylcholinesterase, but also to assess the structural features required for enzyme inhibition. We also evaluated the compounds, active and non-active, in chemical space using the web-based tool ChemGPS-NP to try and determine the relevant chemical space occupied by cholinesterase inhibitors. In this study, we have succeeded in finding potent butyrylcholinesterase inhibitors with a diverse set of structures, nine chemical classes in total. In addition, some of the compounds are bifunctional as they also inhibit Aβ aggregation. The data gathered from all publications regarding the chemical space occupied by butyrylcholinesterase inhibitors we believe will give an insight into the chemically active space occupied by this type of inhibitors and will hopefully facilitate future screening and result in an even deeper knowledge of butyrylcholinesterase inhibitors.

Osuuspankin hallitustyöskentelyn kehittäminen

Tutkimuksen tarkoituksena ja tavoitteena on ollut tutkia osuuspankin hallitustyöskentelyn kehittämistä ja etenkin puheenjohtajan merkittävää sekä erittäin haastavaa roolia. Tutkimuksen taustalla on vuosien saatossa kasvaneet hallitustyön vaatimukset. Tutkimuksen avulla pyritään lisäämään ymmärrystä hallitustyöskentelystä sekä hallituksen puheenjohtajan roolista osuuspankkitoiminnassa, ja samalla tutkimus antaa ideoita siihen, mihin osuuspankkien hallitustyöskentelyssä tulisi jatkossa kiinnittää huomiota. Tutkimus toteutettiin laadullisena tutkimuksena ja sen aineistonkeräysmenetelmänä käytettiin puolistrukturoituja haastatteluja. Tutkimus osoitti, että hallituksen jäseniltä ja etenkin hallituksen puheenjohtajalta vaaditaan tiimitoiminnan ymmärtämistä, loistavia vuorovaikutustaitoja sekä työskentelyä jaetun johtajuuden ideaa ja periaatteita noudattaen sekä eteenpäin vieden. Jaetun johtajuuden avulla hallitustyöskentelyssä saadaan hyödynnettyä paremmin ihmisten erilaiset tiedot, taidot ja osaaminen. Erilaisten osaamisten yhdistämisellä saadaan aikaan tehokkuutta. Osaamisen tulee olla sillä tasolla, että jaettu johtajuus on mahdollinen.

Power semiconductor nonlinearities in active du/dt output filtering

This doctoral thesis introduces an improved control principle for active du/dt output filtering in variable-speed AC drives, together with performance comparisons with previous filtering methods. The effects of power semiconductor nonlinearities on the output filtering performance are investigated. The nonlinearities include the timing deviation and the voltage pulse waveform distortion in the variable-speed AC drive output bridge. Active du/dt output filtering (ADUDT) is a method to mitigate motor overvoltages in variable-speed AC drives with long motor cables. It is a quite recent addition to the du/dt reduction methods available. This thesis improves on the existing control method for the filter, and concentrates on the lowvoltage (below 1 kV AC) two-level voltage-source inverter implementation of the method. The ADUDT uses narrow voltage pulses having a duration in the order of a microsecond from an IGBT (insulated gate bipolar transistor) inverter to control the output voltage of a tuned LC filter circuit. The filter output voltage has thus increased slope transition times at the rising and falling edges, with an opportunity of no overshoot. The effect of the longer slope transition times is a reduction in the du/dt of the voltage fed to the motor cable. Lower du/dt values result in a reduction in the overvoltage effects on the motor terminals. Compared with traditional output filtering methods to accomplish this task, the active du/dt filtering provides lower inductance values and a smaller physical size of the filter itself. The filter circuit weight can also be reduced. However, the power semiconductor nonlinearities skew the filter control pulse pattern, resulting in control deviation. This deviation introduces unwanted overshoot and resonance in the filter. The controlmethod proposed in this thesis is able to directly compensate for the dead time-induced zero-current clamping (ZCC) effect in the pulse pattern. It gives more flexibility to the pattern structure, which could help in the timing deviation compensation design. Previous studies have shown that when a motor load current flows in the filter circuit and the inverter, the phase leg blanking times distort the voltage pulse sequence fed to the filter input. These blanking times are caused by excessively large dead time values between the IGBT control pulses. Moreover, the various switching timing distortions, present in realworld electronics when operating with a microsecond timescale, bring additional skew to the control. Left uncompensated, this results in distortion of the filter input voltage and a filter self-induced overvoltage in the form of an overshoot. This overshoot adds to the voltage appearing at the motor terminals, thus increasing the transient voltage amplitude at the motor. This doctoral thesis investigates the magnitude of such timing deviation effects. If the motor load current is left uncompensated in the control, the filter output voltage can overshoot up to double the input voltage amplitude. IGBT nonlinearities were observed to cause a smaller overshoot, in the order of 30%. This thesis introduces an improved ADUDT control method that is able to compensate for phase leg blanking times, giving flexibility to the pulse pattern structure and dead times. The control method is still sensitive to timing deviations, and their effect is investigated. A simple approach of using a fixed delay compensation value was tried in the test setup measurements. The ADUDT method with the new control algorithm was found to work in an actual motor drive application. Judging by the simulation results, with the delay compensation, the method should ultimately enable an output voltage performance and a du/dt reduction that are free from residual overshoot effects. The proposed control algorithm is not strictly required for successful ADUDT operation: It is possible to precalculate the pulse patterns by iteration and then for instance store them into a look-up table inside the control electronics. Rather, the newly developed control method is a mathematical tool for solving the ADUDT control pulses. It does not contain the timing deviation compensation (from the logic-level command to the phase leg output voltage), and as such is not able to remove the timing deviation effects that cause error and overshoot in the filter. When the timing deviation compensation has to be tuned-in in the control pattern, the precalculated iteration method could prove simpler and equally good (or even better) compared with the mathematical solution with a separate timing compensation module. One of the key findings in this thesis is the conclusion that the correctness of the pulse pattern structure, in the sense of ZCC and predicted pulse timings, cannot be separated from the timing deviations. The usefulness of the correctly calculated pattern is reduced by the voltage edge timing errors. The doctoral thesis provides an introductory background chapter on variable-speed AC drives and the problem of motor overvoltages and takes a look at traditional solutions for overvoltage mitigation. Previous results related to the active du/dt filtering are discussed. The basic operation principle and design of the filter have been studied previously. The effect of load current in the filter and the basic idea of compensation have been presented in the past. However, there was no direct way of including the dead time in the control (except for solving the pulse pattern manually by iteration), and the magnitude of nonlinearity effects had not been investigated. The enhanced control principle with the dead time handling capability and a case study of the test setup timing deviations are the main contributions of this doctoral thesis. The simulation and experimental setup results show that the proposed control method can be used in an actual drive. Loss measurements and a comparison of active du/dt output filtering with traditional output filtering methods are also presented in the work. Two different ADUDT filter designs are included, with ferrite core and air core inductors. Other filters included in the tests were a passive du/dtfilter and a passive sine filter. The loss measurements incorporated a silicon carbide diode-equipped IGBT module, and the results show lower losses with these new device technologies. The new control principle was measured in a 43 A load current motor drive system and was able to bring the filter output peak voltage from 980 V (the previous control principle) down to 680 V in a 540 V average DC link voltage variable-speed drive. A 200 m motor cable was used, and the filter losses for the active du/dt methods were 111W–126 W versus 184 W for the passive du/dt. In terms of inverter and filter losses, the active du/dt filtering method had a 1.82-fold increase in losses compared with an all-passive traditional du/dt output filter. The filter mass with the active du/dt method was 17% (2.4 kg, air-core inductors) compared with 14 kg of the passive du/dt method filter. Silicon carbide freewheeling diodes were found to reduce the inverter losses in the active du/dt filtering by 18% compared with the same IGBT module with silicon diodes. For a 200 m cable length, the average peak voltage at the motor terminals was 1050 V with no filter, 960 V for the all-passive du/dt filter, and 700 V for the active du/dt filtering applying the new control principle.

Defining Sales and Operations Planning Process in an Environmental Management Company

Sales and operations research publications have increased significantly in the last decades. The concept of sales and operations planning (S&OP) has gained increased recognition and has been put forward as the area within Supply Chain Management (SCM). Development of S&OP is based on the need for determining future actions, both for sales and operations, since off-shoring, outsourcing, complex supply chains and extended lead times make challenges for responding to changes in the marketplace when they occur. Order intake of the case company has grown rapidly during the last years. Along with the growth, new challenges considering data management and information flow have arisen due to increasing customer orders. To manage these challenges, case company has implemented S&OP process, though initial process is in early stage and due to this, the process is not managing the increased customer orders adequately. Thesis objective is to explore extensively the S&OP process content of the case company and give further recommendations. Objectives are categorized into six different groups, to clarify the purpose of this thesis. Qualitative research methods used are active participant observation, qualitative interviews, enquiry, education, and a workshop. It is notable that demand planning was felt as cumbersome, so it is typically the biggest challenge in S&OP process. More proactive the sales forecasting can be, more expanded the time horizon of operational planning will turn out. S&OP process is 60 percent change management, 30 percent process development and 10 percent technology. The change management and continuous improvement can sometimes be arduous and set as secondary. It is important that different people are required to improve the process and the process is constantly evaluated. As well as, process governance is substantially in a central role and it has to be managed consciously. Generally, S&OP process was seen important and all the stakeholders were committed to the process. Particular sections were experienced more important than others, depending on the stakeholders’ point of views. Recommendations to objective groups are evaluated by the achievable benefit and resource requirement. The urgent and easily implemented improvement recommendations should be executed firstly. Next steps are to develop more coherent process structure and refine cost awareness. Afterwards demand planning, supply planning, and reporting should be developed more profoundly. For last, information technology system should be implemented to support the process phases.

Socially shared metacognitive regulation during collaborative learning processes in student dyads and small groups

Traditionally metacognition has been theorised, methodologically studied and empirically tested from the standpoint mainly of individuals and their learning contexts. In this dissertation the emergence of metacognition is analysed more broadly. The aim of the dissertation was to explore socially shared metacognitive regulation (SSMR) as part of collaborative learning processes taking place in student dyads and small learning groups. The specific aims were to extend the concept of individual metacognition to SSMR, to develop methods to capture and analyse SSMR and to validate the usefulness of the concept of SSMR in two different learning contexts; in face-to-face student dyads solving mathematical word problems and also in small groups taking part in inquiry-based science learning in an asynchronous computer-supported collaborative learning (CSCL) environment. This dissertation is comprised of four studies. In Study I, the main aim was to explore if and how metacognition emerges during problem solving in student dyads and then to develop a method for analysing the social level of awareness, monitoring, and regulatory processes emerging during the problem solving. Two dyads comprised of 10-year-old students who were high-achieving especially in mathematical word problem solving and reading comprehension were involved in the study. An in-depth case analysis was conducted. Data consisted of over 16 (30–45 minutes) videotaped and transcribed face-to-face sessions. The dyads solved altogether 151 mathematical word problems of different difficulty levels in a game-format learning environment. The interaction flowchart was used in the analysis to uncover socially shared metacognition. Interviews (also stimulated recall interviews) were conducted in order to obtain further information about socially shared metacognition. The findings showed the emergence of metacognition in a collaborative learning context in a way that cannot solely be explained by individual conception. The concept of socially-shared metacognition (SSMR) was proposed. The results highlighted the emergence of socially shared metacognition specifically in problems where dyads encountered challenges. Small verbal and nonverbal signals between students also triggered the emergence of socially shared metacognition. Additionally, one dyad implemented a system whereby they shared metacognitive regulation based on their strengths in learning. Overall, the findings suggested that in order to discover patterns of socially shared metacognition, it is important to investigate metacognition over time. However, it was concluded that more research on socially shared metacognition, from larger data sets, is needed. These findings formed the basis of the second study. In Study II, the specific aim was to investigate whether socially shared metacognition can be reliably identified from a large dataset of collaborative face-to-face mathematical word problem solving sessions by student dyads. We specifically examined different difficulty levels of tasks as well as the function and focus of socially shared metacognition. Furthermore, the presence of observable metacognitive experiences at the beginning of socially shared metacognition was explored. Four dyads participated in the study. Each dyad was comprised of high-achieving 10-year-old students, ranked in the top 11% of their fourth grade peers (n=393). Dyads were from the same data set as in Study I. The dyads worked face-to-face in a computer-supported, game-format learning environment. Problem-solving processes for 251 tasks at three difficulty levels taking place during 56 (30–45 minutes) lessons were video-taped and analysed. Baseline data for this study were 14 675 turns of transcribed verbal and nonverbal behaviours observed in four study dyads. The micro-level analysis illustrated how participants moved between different channels of communication (individual and interpersonal). The unit of analysis was a set of turns, referred to as an ‘episode’. The results indicated that socially shared metacognition and its function and focus, as well as the appearance of metacognitive experiences can be defined in a reliable way from a larger data set by independent coders. A comparison of the different difficulty levels of the problems suggested that in order to trigger socially shared metacognition in small groups, the problems should be more difficult, as opposed to moderately difficult or easy. Although socially shared metacognition was found in collaborative face-to-face problem solving among high-achieving student dyads, more research is needed in different contexts. This consideration created the basis of the research on socially shared metacognition in Studies III and IV. In Study III, the aim was to expand the research on SSMR from face-to-face mathematical problem solving in student dyads to inquiry-based science learning among small groups in an asynchronous computer-supported collaborative learning (CSCL) environment. The specific aims were to investigate SSMR’s evolvement and functions in a CSCL environment and to explore how SSMR emerges at different phases of the inquiry process. Finally, individual student participation in SSMR during the process was studied. An in-depth explanatory case study of one small group of four girls aged 12 years was carried out. The girls attended a class that has an entrance examination and conducts a language-enriched curriculum. The small group solved complex science problems in an asynchronous CSCL environment, participating in research-like processes of inquiry during 22 lessons (á 45–minute). Students’ network discussion were recorded in written notes (N=640) which were used as study data. A set of notes, referred to here as a ‘thread’, was used as the unit of analysis. The inter-coder agreement was regarded as substantial. The results indicated that SSMR emerges in a small group’s asynchronous CSCL inquiry process in the science domain. Hence, the results of Study III were in line with the previous Study I and Study II and revealed that metacognition cannot be reduced to the individual level alone. The findings also confirm that SSMR should be examined as a process, since SSMR can evolve during different phases and that different SSMR threads overlapped and intertwined. Although the classification of SSMR’s functions was applicable in the context of CSCL in a small group, the dominant function was different in the asynchronous CSCL inquiry in the small group in a science activity than in mathematical word problem solving among student dyads (Study II). Further, the use of different analytical methods provided complementary findings about students’ participation in SSMR. The findings suggest that it is not enough to code just a single written note or simply to examine who has the largest number of notes in the SSMR thread but also to examine the connections between the notes. As the findings of the present study are based on an in-depth analysis of a single small group, further cases were examined in Study IV, as well as looking at the SSMR’s focus, which was also studied in a face-to-face context. In Study IV, the general aim was to investigate the emergence of SSMR with a larger data set from an asynchronous CSCL inquiry process in small student groups carrying out science activities. The specific aims were to study the emergence of SSMR in the different phases of the process, students’ participation in SSMR, and the relation of SSMR’s focus to the quality of outcomes, which was not explored in previous studies. The participants were 12-year-old students from the same class as in Study III. Five small groups consisting of four students and one of five students (N=25) were involved in the study. The small groups solved ill-defined science problems in an asynchronous CSCL environment, participating in research-like processes of inquiry over a total period of 22 hours. Written notes (N=4088) detailed the network discussions of the small groups and these constituted the study data. With these notes, SSMR threads were explored. As in Study III, the thread was used as the unit of analysis. In total, 332 notes were classified as forming 41 SSMR threads. Inter-coder agreement was assessed by three coders in the different phases of the analysis and found to be reliable. Multiple methods of analysis were used. Results showed that SSMR emerged in all the asynchronous CSCL inquiry processes in the small groups. However, the findings did not reveal any significantly changing trend in the emergence of SSMR during the process. As a main trend, the number of notes included in SSMR threads differed significantly in different phases of the process and small groups differed from each other. Although student participation was seen as highly dispersed between the students, there were differences between students and small groups. Furthermore, the findings indicated that the amount of SSMR during the process or participation structure did not explain the differences in the quality of outcomes for the groups. Rather, when SSMRs were focused on understanding and procedural matters, it was associated with achieving high quality learning outcomes. In turn, when SSMRs were focused on incidental and procedural matters, it was associated with low level learning outcomes. Hence, the findings imply that the focus of any emerging SSMR is crucial to the quality of the learning outcomes. Moreover, the findings encourage the use of multiple research methods for studying SSMR. In total, the four studies convincingly indicate that a phenomenon of socially shared metacognitive regulation also exists. This means that it was possible to define the concept of SSMR theoretically, to investigate it methodologically and to validate it empirically in two different learning contexts across dyads and small groups. In-depth micro-level case analysis in Studies I and III showed the possibility to capture and analyse in detail SSMR during the collaborative process, while in Studies II and IV, the analysis validated the emergence of SSMR in larger data sets. Hence, validation was tested both between two environments and within the same environments with further cases. As a part of this dissertation, SSMR’s detailed functions and foci were revealed. Moreover, the findings showed the important role of observable metacognitive experiences as the starting point of SSMRs. It was apparent that problems dealt with by the groups should be rather difficult if SSMR is to be made clearly visible. Further, individual students’ participation was found to differ between students and groups. The multiple research methods employed revealed supplementary findings regarding SSMR. Finally, when SSMR was focused on understanding and procedural matters, this was seen to lead to higher quality learning outcomes. Socially shared metacognition regulation should therefore be taken into consideration in students’ collaborative learning at school similarly to how an individual’s metacognition is taken into account in individual learning.

“Who is steering the ship and which constellation guides the way? Exploring transparency in the European Central Bank during the time of crisis”

This paper explores transparency in the decision-making of the European Central Bank (ECB). According to ECB´s definition, transparency means that the central bank provides the general public with all relevant information on its strategy, assessments and policy decisions as well as its procedures in an open, clear and timely manner. In this paper, however, the interpretation of transparency is somewhat broader: Information is freely available and directly accessible to those who will be affected by the decisions. Moreover, the individuals shall be able to master this material. ECB´s negative attitude towards publication of documents has demonstrated central bank´s reluctance to strive towards more extensive transparency. By virtue of the definition adopted by the ECB the bank itself is responsible for determining what is considered as relevant information. On the grounds of EU treaties, this paper assesses ECB`s accountability concentrating especially on transparency by employing principal-agent theory and constitutional approach. Traditionally, the definite mandate and the tenet of central bank independence have been used to justify the limited accountability. The de facto competence of the ECB has, however, considerably expanded as the central bank has decisively resorted to non-standard measures in order to combat the economic turbulences facing Europe. It is alleged that non-standard monetary policy constitutes a grey zone occasionally resembling economic policy or fiscal policy. Notwithstanding, the European Court of Justice has repeatedly approved these measures. This dynamic interpretation of the treaties seems to allow temporarily exceptions from the central bank´s primary objective during extraordinary times. Regardless, the paper suggests that the accountability nexus defined in the treaties is not sufficient in order to guarantee the accountability of the ECB after the adoption of the new, more active role. Enhanced transparency would help the ECB to maintain its credibility. Investing in the quality of monetary dialogue between the Parliament and the ECB appears to constitute the most adequate and practicable method to accomplish this intention. As a result of upgraded transparency the legitimacy of the central bank would not solely rest on its policy outputs.