Soldiering and the making of Finnish manhood : conscription and masculinity in interwar Finland, 1918–1939

Military conscription and peacetime military service were the subjects of heated political, social and cultural controversies during the early years of national independence in Finland. Both the critics and the supporters of the existing military system described it as strongly formative of young men’s physical and moral development into adult men and male citizens. The conflicts over conscription prompted the contemporaries to express their notions about what Finnish men were like, at their best and at their worst, and what should and could be done about it. This thesis studies military conscription as an arena for the “making of manhood” in peacetime Finnish society, 1918–1939. It examines a range of public images of conscripted soldiering, asking how soldiering was depicted and given gendered meanings in parliamentary debates, war hero myths, texts concerned with the military and civic education of conscripts, as well as in works of fiction and reminiscences about military training as a personal experience. Studying conscription with a focus on masculinity, the thesis explores the different cultural images of manliness, soldiering and male citizenship on offer in Finnish society. It investigates how political parties, officers, educators, journalists, writers and “ordinary” conscripts used and developed, embraced or rejected these notions, according to their political purposes or personal needs. The period between the two world wars can be described as a fast-forward into military modernity in Finland. In the process, European middle class gender ideologies clashed with Finnish agrarian masculinities. Nationalistic agendas for the militarisation of Finnish manhood stumbled against intense class conflicts and ideological resistance. Military propaganda used images of military heroism, civic virtue and individual success to persuade the conscripts into ways of thinking and acting that were shaped by bourgeois mentality, nationalistic ideology and religious morality. These images are further analysed as expressive of the personal experiences and emotions of their middle-aged, male authors. The efforts of these military educators were, however, actively resisted on many fronts, ranging from rural working class masculinities among the conscripted young men to ideological critiques of the standing army system in parliament. In narratives about military training, masculinity was depicted as both strengthened and contradicted by the harsh and even brutal practices of interwar Finnish military training. The study represents a combination of new military history and the historical study of men and masculinities. It approaches masculinity as a contested and highly political form of social and cultural knowledge that is actively and selectively used by historic actors. Instead of trying to identify a dominant or “hegemonic” form of masculinity within a pre-determined theoretical structure, this study examines how the meanings ascribed to manhood varied according to class, age, political ideology and social situation. The interwar period in Finland can be understood as a period of contest between different notions of militarised masculinity, yet to judge by the materials studied, there was no clear winning party in that contest. A gradual movement from an atmosphere of conflict surrounding conscription towards political and cultural compromises can be discerned, yet this convergence was incomplete and many division lines remained.

Älypuhelimien käytettävyys naisnäkökulmasta

Tämän tutkimuksen aiheena oli älypuhelimien käytettävyys naisnäkökulmasta. Aihe nousi esiin kesällä 2010 huomatessani, että älypuhelinmarkkinat ja –mainokset ovat hyvin pitkälle miehille suunnattuja. Etsiessäni materiaalia tuekseni tähän työhön huomasin, että sitä on erittäin vähän saatavilla. Tämän takia päätin toteuttaa työn käytettävyystestausprojektina. Projektin testiryhmä koostui naisista, jonka jäseniä pyydettiin suorittamaan valitsemillaan älypuhelimilla testitehtäviä. Testin jälkeen he vastasivat käytettävyystestauslomakkeissa olleisiin kysymyksiin, jotka koskivat testattuja älypuhelimia. Tutkimustuloksia analysoitaessa nousi esiin vähäinen tarve älypuhelimen ostamiseen. Tässä käytettävyystestausprojektissa lopputulos oli, että testaajat eivät kokeneet tarvetta ostaa vaikeasti hallittavaa sekä turhia sovelluksia sisältävää ja kallista älypuhelinta.

Methods and Models for Accelerating Dynamic Simulation of Fluid Power Circuits

The objective of this dissertation is to improve the dynamic simulation of fluid power circuits. A fluid power circuit is a typical way to implement power transmission in mobile working machines, e.g. cranes, excavators etc. Dynamic simulation is an essential tool in developing controllability and energy-efficient solutions for mobile machines. Efficient dynamic simulation is the basic requirement for the real-time simulation. In the real-time simulation of fluid power circuits there exist numerical problems due to the software and methods used for modelling and integration. A simulation model of a fluid power circuit is typically created using differential and algebraic equations. Efficient numerical methods are required since differential equations must be solved in real time. Unfortunately, simulation software packages offer only a limited selection of numerical solvers. Numerical problems cause noise to the results, which in many cases leads the simulation run to fail. Mathematically the fluid power circuit models are stiff systems of ordinary differential equations. Numerical solution of the stiff systems can be improved by two alternative approaches. The first is to develop numerical solvers suitable for solving stiff systems. The second is to decrease the model stiffness itself by introducing models and algorithms that either decrease the highest eigenvalues or neglect them by introducing steady-state solutions of the stiff parts of the models. The thesis proposes novel methods using the latter approach. The study aims to develop practical methods usable in dynamic simulation of fluid power circuits using explicit fixed-step integration algorithms. In this thesis, twomechanisms whichmake the systemstiff are studied. These are the pressure drop approaching zero in the turbulent orifice model and the volume approaching zero in the equation of pressure build-up. These are the critical areas to which alternative methods for modelling and numerical simulation are proposed. Generally, in hydraulic power transmission systems the orifice flow is clearly in the turbulent area. The flow becomes laminar as the pressure drop over the orifice approaches zero only in rare situations. These are e.g. when a valve is closed, or an actuator is driven against an end stopper, or external force makes actuator to switch its direction during operation. This means that in terms of accuracy, the description of laminar flow is not necessary. But, unfortunately, when a purely turbulent description of the orifice is used, numerical problems occur when the pressure drop comes close to zero since the first derivative of flow with respect to the pressure drop approaches infinity when the pressure drop approaches zero. Furthermore, the second derivative becomes discontinuous, which causes numerical noise and an infinitely small integration step when a variable step integrator is used. A numerically efficient model for the orifice flow is proposed using a cubic spline function to describe the flow in the laminar and transition areas. Parameters for the cubic spline function are selected such that its first derivative is equal to the first derivative of the pure turbulent orifice flow model in the boundary condition. In the dynamic simulation of fluid power circuits, a tradeoff exists between accuracy and calculation speed. This investigation is made for the two-regime flow orifice model. Especially inside of many types of valves, as well as between them, there exist very small volumes. The integration of pressures in small fluid volumes causes numerical problems in fluid power circuit simulation. Particularly in realtime simulation, these numerical problems are a great weakness. The system stiffness approaches infinity as the fluid volume approaches zero. If fixed step explicit algorithms for solving ordinary differential equations (ODE) are used, the system stability would easily be lost when integrating pressures in small volumes. To solve the problem caused by small fluid volumes, a pseudo-dynamic solver is proposed. Instead of integration of the pressure in a small volume, the pressure is solved as a steady-state pressure created in a separate cascade loop by numerical integration. The hydraulic capacitance V/Be of the parts of the circuit whose pressures are solved by the pseudo-dynamic method should be orders of magnitude smaller than that of those partswhose pressures are integrated. The key advantage of this novel method is that the numerical problems caused by the small volumes are completely avoided. Also, the method is freely applicable regardless of the integration routine applied. The superiority of both above-mentioned methods is that they are suited for use together with the semi-empirical modelling method which necessarily does not require any geometrical data of the valves and actuators to be modelled. In this modelling method, most of the needed component information can be taken from the manufacturer’s nominal graphs. This thesis introduces the methods and shows several numerical examples to demonstrate how the proposed methods improve the dynamic simulation of various hydraulic circuits.

”Jos tietää, mitä haluaa.” Seurantatutkimus lukio-opiskelijoiden itsesäätelystä, opiskelun kulusta ja odotusten toteutumisesta

Tutkimuksen päätarkoituksena on selvittää lukio-opiskelijoiden käsityksiä oppimisensa itsesäätelystrategioista. Lukiokoulutuksessa toteutetut muutokset kuten valinnanmahdollisuuksien lisääntyminen ovat antaneet lukio-opiskelijoille kasvaneen mahdollisuuden omanlaisensa lukio-opiskelupolun suunnitteluun ja yksilölliseen tavoitteenasetteluun. Työssä tarkastellaan myös lukio-opiskelijoiden opintojen kulkua, erilaisia opiskeluodotuksia ja niiden toteutumista sekä näiden yhteyttä itsesäätelyyn. Tutkimus toteutettiin seurantatutkimuksena, jossa kyselylomakkeilla kerättiin tietoa syksyllä 2004 Turun kaupungin suomenkielisissä päivälukioissa (10 koulua) opintonsa aloittavilta opiskelijoilta kahdesti; ensimmäisenä ja kolmantena opiskeluvuotena. Tutkimuksessa oli mukana 245 opiskelijaa, 142 tyttöä ja 103 poikaa. Tutkimuksen vastausprosentti oli 84 %. Kyselylomakkeiden itsesäätelyä ja oppimisorientaatioita koskevat kysymykset pohjautuivat Jan Vermuntin ILS-oppimistyylimittariin (Inventory of Learning Styles) (Vermunt 1994; 1996). Lisäksi haastateltiin 15 tutkimuksessa mukana ollutta opiskelijaa. Kyselylomakeaineisto analysoitiin ristiintaulukoinneilla, korrelaatiokertoimilla, t-testeillä ja erilaisilla varianssianalyyseillä. Itsesäätelystrategiamittarin neljän summamuuttujan oletus testattiin erikseen mittauksissa 1 ja 2 konfirmatorisen faktorianalyysin avulla. Tutkimuksessa identifioitiin klusterianalyysillä tehdyssä ryhmittelyssä neljä erilaista lukio-opiskelijaryhmää: menestyvät navigoijat, tavalliset tasapainoilijat, säätelemättömät kulkeutujat ja ylikuormittuneet avuntarvitsijat. Navigoijille on tyypillistä niin prosessin/ tulosten kuin sisällön suhteen korkea itsesäätely. Tyypillinen piirre navigoijien kohdalla on myös ulkoisen säätelyn korkea taso. Avuntarvitsijat eroavat muista ryhmistä selkeästi korkeampien puutteellisten säätelystrategioidensa perusteella, vaikka heidän itsesäätelynsä on suhteellisesti niihin ja muihin ryhmiin nähden melko korkealla tasolla. Tasapainoilijat sijoittuvat itsesäätelyn ja ulkoisen säätelyn osalta ryhmien keskitasolle. Kulkeutujien itsesäätely samoin kuin ulkoinen säätely ovat ryhmien matalinta tasoa. Tuloksista nähdään, että kehittyneemmällä itsesäätelyllä on selvä yhteys lukio-opintojen sujuvuuteen ja opintomenestykseen, mutta noin kolmasosalle opiskelijoista itsesäätelevä, suunnitelmallinen tavoitteenasettelu on vaikeaa. Navigoijilla ja tasapainoilijoilla opiskelu on sekä heille itselleen mielekästä että ulkoisesti arvioituna tehokasta. Joidenkin opiskelijoiden erityisesti avuntarvitsijoiden ja kulkeutujien keskuudessa opintojen kulku sen sijaan hapuilee. Lukiolaisten opiskeluun kohdistuvien odotusten voidaan tämän tutkimuksen tuloksen perusteella katsoa ennustavan todellista opintojen kulkua ja opintomenestystä melko hyvin. Eroja on sekä tavoitetasossa, opiskeluprosessiin liittyvissä kokemuksissa että jatko-opintosuunnitelmissa ja ne ovat yhteydessä sukupuoleen, isän sosioekonomiseen asemaan, erikoislinjalla opiskeluun sekä lukion alun itsesäätelyryhmiin.

Rakennustarkastuksen mobiilityökalun suunnittelu ja toteuttaminen

Rakennusteollisuuden prosessit ovat vielä usein paperipohjaisia, mikä aiheuttaa työmaiden luonteesta johtuen tiedon hajaantumista, hidastaa tiedon siirtymistä ja vaikeuttaa tiedon käsittelyä. Työmaiden väliaikaisilla konttoreilla tiedon määrä voi nousta hallitsemattoman suureksi, mikä haittaa ja hidastaa työnjohdon päätöksentekoa. Käyttämällä sähköisiä työkaluja tiedon keräämistä, keskittämistä ja siirtoa voidaan tehostaa. Projektin tavoitteeksi otettiin teollisuuden laadunvalvonnan tarkastusprosessin tehostaminen ajallisesti käyttämällä tarkastustyöhön sähköistä tarkastuspöytäkirjaa. Tätä varten suunniteltiin sähköinen tarkastusjärjestelmä, joka koostuu kolmesta erillisestä osasta: Tarkastajan mukana kulkeva mobiililaite, jolle tallennetaan suoraan tarkastuksen laatutietoa, palvelinkone avustamaan tiedonsiirrossa ja –varastoinnissa sekä työpöytäsovellus työnjohdon tarpeisiin. Järjestelmää testattiin sähköalan asennuksia tekevässä yrityksessä osana yrityksen normaalia tarkastustyötä. Verrattuna paperiseen pöytäkirjaan sähköinen tarkastusjärjestelmä nopeutti prosessia moninkertaisesti. Nopeustesteissä havaittiin kuitenkin, että valittu tiedon synkronointikirjasto oli järjestelmän tarpeisiin liian hidas. Järjestelmä saavutti sille asetetut tavoitteet tehostamalla prosessia ajallisesti, mutta järjestelmässä on vielä osa-alueita, jotka tarvitsevat jatkokehittämistä.

An Infant with Food Allergy and Eczema in the Family – The Mental and Economic Burden of Caring

Allergic diseases including food allergy and eczema in an infant in combination with the everyday activities of caring for a family will pose challenges to parents. Only fragments of these challenges are revealed to health care professionals. Families have varying mental, social and economic resources to help them care for an allergic infant, and all such resources are important in determining how families succeed in meeting these challenges and the quality of the infant’s care. This study evaluated the whole burden to the family caused by an infant's allergic disease during the first 24 months of life. As the primary caregiver during this period is usually the mother, her perspective was considered important. Ecocultural theory, which considers families as capable of modifying the positive and negative forces facing them, was taken as the frame of reference. Data were collected as part of an ongoing prospective mother-infant study, and the methods included severity scoring of atopic dermatitis, dietary records, health-related quality of life measurements and assessments of the use of health care services and medications for treating the infant’s eczema, food allergy and asthma. Interviews with mothers were analysed by deductive content analysis on the basis of ecocultural theory and the family empowerment model. The theme “Living an ordinary family life” guided the organization of family activities essential for treating the infant's food allergy and eczema. These activities were sources of both strain and support for the mothers, the allergy-related supporting factors being the mother’s own knowledge of the allergy, hopes for an improvement in the infant’s condition, social support and work. An infant’s food allergy at the age of one year caused considerable strain for the mother in cases where the introduction of new foods into the child’s diet was delayed. This delay was still causing the mother additional strain when the child was 24 months of age. The infants waking at night at the ages of 12 and 24 months because of itching related to eczema caused strain for the mothers. The infants’ health-related quality of life was impaired at ages of 6 and 12 months compared with healthy infants. The principal reasons for impairments were itching, scratching and sleep disturbances at 6 and 12 months and treatment difficulties at 6 months. Problems with getting to sleep were reported at all stages irrespective of eczema and were also present in healthy infants. The economic impact of the treatment of allergic diseases on families during the first 24 months was 131 EUR (2006 value) in cases of eczema and 525 EUR in cases of food allergy. From the societal perspective, the costs of food allergy were a median of 3183 EUR (range 628–11 560 EUR) and of eczema a median of 275 EUR (range 94–1306 EUR). These large variations in costs in food allergy and eczema indicate that disease varies greatly . In conclusion, food allergy and eczema cause extra activities and costs to families which arrange these disease-related activities in such a way that they support the leading family theme “Living an ordinary family life”. Health care professionals should consider this thematic character of family life and disease-related activities in order to ensure that new treatments are sustainable, meaningful and tailored to daily activities. In addition, those mothers who are experiencing difficulties with food allergic infants or infants with eczema should be recognized early and provided with individual encouragement and support from health clinics. In the light of the present results, early detection of symptoms and effective parental guidance can contribute to the well-being and health-related quality of life of the child and family.

Reflexive model of research-based theatre – processing innovation at the crossroads of theatre, reflection and practice-based innovation activities

Contemporary organisations have to embrace the notion of doing ‘more with less’. This challenges knowledge production within companies and public organisations, forcing them to reorganise their structures and rethink what knowledge production actually means in the context of innovation and how knowledge is actually produced among various professional groups within the organisation in their everyday actions. Innovations are vital for organisational survival, and ‘ordinary’ employees and customers are central but too-often ignored producers of knowledge for contemporary organisations. Broader levels of participation and reflexive practices are needed. This dissertation discusses the missing links between innovation research conducted in the context of industrial management, arts, and culture; applied drama and theatre practices (specifically post-Boalian approaches); and learning – especially organising reflection – in organisational settings. This dissertation (1) explores and extends the role of research-based theatre to organising reflection and reflexive practices in the context of practice-based innovation, (2) develops a reflexive model of RBT for investigating and developing practice-based organisational process innovations in order to contribute to the development of a tool for innovation management and analysis, and (3) operationalises this model within private- and publicsector organisations. The proposed novel reflexive model of research-based theatre for investigating and developing practice-based organisational process innovations extends existing methods and offers a different way of organising reflection and reflexive practices in the context of general innovation management. The model was developed through five participatory action research processes conducted in four different organisations. The results provide learning steps – a reflection path – for understanding complex organisational life, people, and relations amid renewal and change actions. The proposed model provides a new approach to organising and cultivating reflexivity in practice-based innovation activities via research-based theatre. The results can be utilised as a guideline when processing practice-based innovation within private or public organisations. The model helps innovation managers to construct, together with their employees, temporary communities where they can learn together through reflecting on their own and each others’ experiences and to break down assumptions related to their own perspectives. The results include recommendations for practical development steps applicable in various organisations with regard to (i) application of research-based theatre and (ii) related general innovation management. The dissertation thus contributes to the development of novel learning approaches in knowledge production. Keywords: practice-based innovation, research-based theatre, learning, reflection, mode 2b knowledge production

Circular Spectropolarimetric Studies of DQ White Dwarfs

This thesis summarizes studies of a class of white dwarfs (WDs) called DQ WDs. White dwarfs are the remnants of ordinary stars like our Sun that have run out of nuclear fuel. WDs are classified according to the composition of their atmosphere and DQ WDs have an atmosphere made of helium and carbon. The carbon comes in either atomic or molecular form and in some cases the strong spectral absorption features cover the entire optical wavelength region. The research presented here utilizes spectropolarimetry, which is an observational technique that combines spectroscopy and polarization. Separately these allow to study the composition of a target and the inhomogeneous distribution of matter in the target. Put together they form a powerful tool to probe the physical properties in the atmosphere of a star. It is espacially good for detecting magnetic fields. The papers in this thesis describe efforts to do a survey of DQ white dwarfs with spectropolarimetry in order to search for magnetic fields in them. Paper I describes the discovery of a new magnetic cool DQ white dwarf, GJ841B. Initial modeling of molecular features on DQ WDs showed inconsistencies with observations. The first possible solution to this problem was stellar spots on these WDs. To investigate the matter, two DQ WDs were monitored for photometric variability that could arise from the presence of such spots. Paper II summarizes this short campaign and reports the negative results. Paper III reports observations of the rest of the objects in our survey. The paper includes the discovery of polarization from another cool DQ white dwarf, bringing the total of known magnetic cool DQs to three. Unfortunately the model used in this thesis cannot, in its present state, be used to model these objects nor are the observations of high enough spectroscopic resolution to do so.

Stochastic approximation methods in stochastic optimization

Stochastic approximation methods for stochastic optimization are considered. Reviewed the main methods of stochastic approximation: stochastic quasi-gradient algorithm, Kiefer-Wolfowitz algorithm and adaptive rules for them, simultaneous perturbation stochastic approximation (SPSA) algorithm. Suggested the model and the solution of the retailer's profit optimization problem and considered an application of the SQG-algorithm for the optimization problems with objective functions given in the form of ordinary differential equation.

Numerical Simulation of Stochastic Di erential Equations

Stochastic differential equation (SDE) is a differential equation in which some of the terms and its solution are stochastic processes. SDEs play a central role in modeling physical systems like finance, Biology, Engineering, to mention some. In modeling process, the computation of the trajectories (sample paths) of solutions to SDEs is very important. However, the exact solution to a SDE is generally difficult to obtain due to non-differentiability character of realizations of the Brownian motion. There exist approximation methods of solutions of SDE. The solutions will be continuous stochastic processes that represent diffusive dynamics, a common modeling assumption for financial, Biology, physical, environmental systems. This Masters' thesis is an introduction and survey of numerical solution methods for stochastic differential equations. Standard numerical methods, local linearization methods and filtering methods are well described. We compute the root mean square errors for each method from which we propose a better numerical scheme. Stochastic differential equations can be formulated from a given ordinary differential equations. In this thesis, we describe two kind of formulations: parametric and non-parametric techniques. The formulation is based on epidemiological SEIR model. This methods have a tendency of increasing parameters in the constructed SDEs, hence, it requires more data. We compare the two techniques numerically.

Suurnopeuspumput

Suurnopeustekniikasta on tehty tutkimusta 1980-luvulta lähtien. On havaittu, että tiettyjen energiateknisten sovellusten hyötysuhde paranee, kun käytetään selkeästi tavanomaista suurempaa pyörimisnopeutta. Suurnopeuspumppuja on totuttu näkemään lähinnä erikoiskohteissa, kuten avaruustekniikassa. Tämän työn tarkoituksena on kartoittaa, voiko suurnopeuspumppuja käyttää tavallisissa teollisuussovelluksissa, joissa tarvitaan korkeapaineista vettä. Työssä selvitetään pumppujen laskentaan ja valintaan liittyvää käsitteistöä, sekä luodaan kirjallisuuskatsaus suurnopeuspumppujen kehitykseen. Työn tarkoituksena on myöskin luoda valmiuksia suurnopeuspumppujen tutkimukseen ja arviointiin.

Bio-ethanol valorization towards C4s including 1-butanol over metal modified alumina and zeolite catalysts

Bio-ethanol has been used as a fuel additive in modern society aimed at reducing CO2-emissions and dependence on oil. However, ethanol is unsuitable as fuel supplement in higher proportions due to its physico-chemical properties. One option to counteract the negative effects is to upgrade ethanol in a continuous fixed bed reactor to more valuable C4 products such as 1-butanol providing chemical similarity with traditional gasoline components. Bio-ethanol based valorization products also have other end-uses than just fuel additives. E.g. 1-butanol and ethyl acetate are well characterised industrial solvents and platform chemicals providing greener alternatives. The modern approach is to apply heterogeneous catalysts in the investigated reactions. The research was concentrated on aluminium oxide (Al2O3) and zeolites that were used as catalysts and catalyst supports. The metals supported (Cu, Ni, Co) gave very different product profiles and, thus, a profound view of different catalyst preparation methods and characterisation techniques was necessary. Additionally, acidity and basicity of the catalyst surface have an important role in determining the product profile. It was observed that ordinary determination of acid strength was not enough to explain all the phenomena e.g. the reaction mechanism. One of the main findings of the thesis is based on the catalytically active site which originates from crystallite structure. As a consequence, the overall evaluation of different by-products and intermediates was carried out by combining the information. Further kinetic analysis was carried out on metal (Cu, Ni, Co) supported self-prepared alumina catalysts. The thesis gives information for further catalyst developments aimed to scale-up towards industrially feasible operations.

Analyses of the usefulness of Software Defined Storage Solutions for Web-based Digital Preservation Applications

Presentation at Open Repositories 2014, Helsinki, Finland, June 9-13, 2014

Liquidity and Asset Pricing in the French Stock Market

This thesis investigates pricing of liquidity in the French stock market. The study covers 835 ordinary shares traded in the period of 1996-2014 on Paris Euronext. The author utilizes the Liquidity-Adjusted Capital Asset Pricing Model (LCAPM) recently developed by Acharya and Pedersen (2005) to test whether liquidity level and risks significantly affect stock returns. Three different liquidity measures – Amihud, FHT, and PQS – are incorporated into the model to find any difference between the results they could provide. It appears that the findings largely depend on the liquidity measure used. In general the results exhibit more evidence for insignificant influence of liquidity level and risks as well as market risk on stock returns. The similar conclusion was reported earlier by Lee (2011) for several regions, including France. This finding of the thesis, however, is not consistent across all the liquidity measures. Nevertheless, the difference in the results between these measures provides new insight to the existing literature on this topic. The Amihud-based findings might indicate that market resiliency is not priced in the French stock market. At the same time the contradicting results from FHT and PQS provide some foundation for the hypothesis that one of two leftover liquidity dimensions – market depth or breadth – could significantly affect stock returns. Therefore, the thesis’ findings suggest a conjecture that different liquidity dimensions have different impacts on stock returns.

Context-specific independence in graphical models

The theme of this thesis is context-speci c independence in graphical models. Considering a system of stochastic variables it is often the case that the variables are dependent of each other. This can, for instance, be seen by measuring the covariance between a pair of variables. Using graphical models, it is possible to visualize the dependence structure found in a set of stochastic variables. Using ordinary graphical models, such as Markov networks, Bayesian networks, and Gaussian graphical models, the type of dependencies that can be modeled is limited to marginal and conditional (in)dependencies. The models introduced in this thesis enable the graphical representation of context-speci c independencies, i.e. conditional independencies that hold only in a subset of the outcome space of the conditioning variables. In the articles included in this thesis, we introduce several types of graphical models that can represent context-speci c independencies. Models for both discrete variables and continuous variables are considered. A wide range of properties are examined for the introduced models, including identi ability, robustness, scoring, and optimization. In one article, a predictive classi er which utilizes context-speci c independence models is introduced. This classi er clearly demonstrates the potential bene ts of the introduced models. The purpose of the material included in the thesis prior to the articles is to provide the basic theory needed to understand the articles.