Construction and validation of a surgical skills assessment tool for general surgery residency program

Objective: To develop and validate an instrument for measuring the acquisition of technical skills in conducting operations of increasing difficulty for use in General Surgery Residency (GSR) programs. Methods: we built a surgical skills assessment tool containing 11 operations in increasing levels of difficulty. For instrument validation we used the face validaity method. Through an electronic survey tool (Survey MonKey(r)) we sent a questionnaire to Full and Emeritus members of the Brazilian College of Surgeons - CBC - all bearers of the CBC Specialist Title. Results: Of the 307 questionnaires sent we received 100 responses. For the analysis of the data collected we used the Cronbach's alpha test. We observed that, in general, the overall alpha presented with values near or greater than 0.70, meaning good consistency to assess their points of interest. Conclusion: The evaluation instrument built was validated and can be used as a method of assessment of technical skill acquisition in the General Surgery Residency programs in Brazil.

Device model for training of laparoscopic surgical skills

The authors present a especially constructed, lightweight, collapsible, portable and low cost model device for skills training in laparoscopic.

Vertaileva tapaustutkimus kuusivuotiaiden opetus–oppimis -vuorovaikutuksesta, matematiikkaepisodeista ja lukukäsitteen osaamisesta

Tässä vertailevassa kansainvälisessä tapaustutkimuksessa tarkasteltiin kuusivuotiaiden matematiikan tuntien opetus–oppimis -vuorovaikutusta ja lukukäsitteen osaamista Suomen, Englannin ja Ruotsin toiminta- ja oppimisympäristöissä. Toteutuneita opetus–oppimis -prosesseja verrattiin opetussuunnitelmien yleisiin- ja matematiikan tavoitteisiin sekä lukukäsitteen osaamistasoon. Empiirinen tutkimusaineisto sisälsi lasten (N=99) lukukäsitteen osaamistason yksilötestauksen ja laadullisen analyysin yhteensä seitsemän viikon matematiikan tuntien (880 minuutin) videoidusta opetus – oppimis -vuorovaikutuksesta. Minuutin analyysiyksikköina tarkasteltuna kuusivuotiaiden tutkimusviikon matematiikan tuntien opetus–oppimis -vuorovaikutuksesta lähes puolet ilmensi opettajalähtöisyyttä, kolmannes oppijalähtöisyyttä ja lähes viidennes ilmensi jaettua vuorovaikutusta. Kun tutkimusviikon matematiikan opetusta tarkasteltiin merkityksellisten vuorovaikutuskokonaisuuksien, episodien luokittelun pohjalta havaittiin, että kaikista viikon matematiikkaepisodeista (N=371) yli puolet edusti opettajalähtöisyyttä ja kolmannes edusti opettajalähtöisen ja jaetun vuorovaikutuksen yhdistelmää. Episodien keskimääräinen kesto oli noin kaksi minuuttia tässä tutkimuksessa. Tuloksissa ilmeni ryhmien välisiä eroja opetus–oppimis -vuorovaikutuksen ominaisuuksissa sekä erityyppisiä matematiikan tuntien rakennemalleja ja lukukäsitteen osaamistasoeroja. Monipuolinen ja muita näytteitä enemmän jaettua vuorovaikutusta edustava oppimisympäristö, oli tässä aineistossa yhteydessä keskiarvoa korkeampaan lukukäsitteen osaamistasoon. Korostetun opettajalähtöinen oppimisympäristö oli yhteydessä keskimääräiseen lukukäsitteen osaamistasoon. Muita tutkimuskohteita oppijalähtöisempi oppimisympäristö oli yhteydessä keskimääräisistä alempaan lukukäsitteen osaamistasoon. Tutkimustulosten perusteella tarkentuu kuva erilaisista opetus–oppimis -prosessin osatekijöistä, joita voidaan mahdollisesti soveltaa eri oppiaineisiin vastaavanlaisissa formaaleissa oppimisympäristöissä.

Maintaining Children’s Finnish Language Skills in an English Language Setting. A Study of Scottish-Finnish Families Living in Scotland

Tutkielmassa käsitellään kaksikielistä lastenkasvatusta ja siinä käytettäviä kasvatus-strategioita, erityisesti ns. OPOL-strategiaa, eli yksi henkilö – yksi kieli -strategiaa (one person – one language). Tarkoituksena oli selvittää, millä tavoin kaksikielisen perheen vanhemmat voivat tukea vähemmistökielen oppimista sellaisessa ympäristössä, jossa kielen oppimista ei tueta kodin ulkopuolella. Tutkielman alussa määrittelen keskeiset termit. Useita aiheeseen liittyviä termejä määritellään yleiskielessä eri tavoin jo termistä kaksikielisyys lähtien, joten termien rajaaminen tämän työn tarkoituksen mukaan oli tarpeen. Määrittelen myös tekstissä esiintyvät kaksikielisyyden eri tyypit ja taustat, kuten myös eri strategiat, joita kaksikielisessä kasvatuksessa voidaan käyttää. Tämän jälkeen esittelen aikaisempia kaksikielisyystutkimuksia sekä käsittelen OPOL-strategiaan liittyviä käytännön ongelmia, sekä näiden ongelmien mahdollisia ratkaisuja. Lopuksi käsittelen tutkimuksen empiiristä osiota, joka koostui sähköisestä kyselylomakkeesta sekä haastatteluista. Tutkimuksen kohderyhmä koostui Skotlannissa asuvista skotlantilais-suomalaisista perheistä, jotka pyrkivät kasvattamaan lapsistaan kaksikielisiä. Tutkimus tehtiin kahdessa osassa: ensimmäisen osan kyselylomakkeeseen vastasi 17 eri puolilla Skotlantia asuvaa suomenkielistä vanhempaa, ja toisessa osassa haastateltiin 10:tä Edinburghin ja Glasgow’n alueilla asuvaa kaksikielistä (suomi-englanti) perhettä. Molemmissa osioissa keskityttiin siihen, millä tavoin perheet tukevat lasten suomen kielen taitoa ja miten suomenkielistä syötettä yritetään lisätä. Tutkimuksen tuloksista käy ilmi, että Skotlannissa asuvat suomenkieliset vanhemmat ovat hyvin motivoituneita tukemaan lastensa kielellistä kehitystä eri tavoin, mm. lukemalla kirjoja, katsomalla elokuvia ja käymällä Suomi-koulussa. Suurin osa perheistä myös käy Suomessa säännöllisesti, mikä näyttäisikin olevan yksi keskeisimmistä kaksikielisyyttä tukevista tekijöistä. Eri perheiden lapset olivat saavuttaneet eri tasoja suomen kielessä, mikä viittaa siihen, ettei lapsen kielitaito ole seurausta ainoastaan OPOL-strategian tarkasta seuraamisesta, vaan siihen vaikuttavat myös monet muut tekijät.

The Changing Role of the CIO: Developing Skills by Means of Postgraduate Educational Programs

The objective of this research was to identify the skills and competences required by Chief Information Officers in their professional life and whether these skills can be developed by means of postgraduate education pro-grams. Although the changing role of the CIO has been studied for years by the academia, the ways of necessary skills development have not been paid significant attention. In order to obtain understanding of the topic and its main issues qualitative method was implemented and questionnaires and interviews were conducted with CIOs and other C-level executives to-gether with analysis of the curricula of postgraduate educational programs in the field of business designed for executives. Business skills and knowledge along with developed communication and leadership skills are among the most discussed and required from CIOs. According to the collected data and its further analysis, although the most important competences of an IT executive are technological, the im-portance of business related skills is emphasized by the majority of re-spondents and supported by the existing theory. Postgraduate educational programs have curricula that can develop the required competences, alt-hough not equally.

Mathematical modeling of laboratory scale three-phase fixed bed reactors

Detta arbete fokuserar på modellering av katalytiska gas-vätskereaktioner som genomförs i kontinuerliga packade bäddar. Katalyserade gas-vätskereaktioner hör till de mest typiska reaktionerna i kemisk industri; därför behandlas här packade bäddreaktorer som ett av de populäraste alternativen, då kontinuerlig drift eftersträvas. Tack vare en stor katalysatormängd per volym har de en kompakt struktur, separering av katalysatorn behövs inte och genom en professionell design kan den mest fördelaktiga strömningsbilden upprätthållas i reaktorn. Packade bäddreaktorer är attraktiva p.g.a. lägre investerings- och driftskostnader. Även om packade bäddar används intensivt i industri, är det mycket utmanande att modellera. Detta beror på att tre faser samexisterar och systemets geometri är komplicerad. Existensen av flera reaktioner gör den matematiska modelleringen även mera krävande. Många förenklingar blir därmed nödvändiga. Modellerna involverar typiskt flera parametrar som skall justeras på basis av experimentella data. I detta arbete studerades fem olika reaktionssystem. Systemen hade studerats experimentellt i vårt laboratorium med målet att nå en hög produktivitet och selektivitet genom ett optimalt val av katalysatorer och driftsbetingelser. Hydrering av citral, dekarboxylering av fettsyror, direkt syntes av väteperoxid samt hydrering av sockermonomererna glukos och arabinos användes som exempelsystem. Även om dessa system hade mycket gemensamt, hade de också unika egenskaper och krävde därför en skräddarsydd matematisk behandling. Citralhydrering var ett system med en dominerande huvudreaktion som producerar citronellal och citronellol som huvudprodukter. Produkterna används som en citrondoftande komponent i parfymer, tvålar och tvättmedel samt som plattform-kemikalier. Dekarboxylering av stearinsyra var ett specialfall, för vilket en reaktionsväg för produktion av långkedjade kolväten utgående från fettsyror söktes. En synnerligen hög produktselektivitet var karakteristisk för detta system. Även processuppskalning modellerades för dekarboxylerings-reaktionen. Direkt syntes av väteperoxid hade som målsättning att framta en förenklad process att producera väteperoxid genom att låta upplöst väte och syre reagera direkt i ett lämpligt lösningsmedel på en aktiv fast katalysator. I detta system förekommer tre bireaktioner, vilka ger vatten som oönskad produkt. Alla dessa tre reaktioner modellerades matematiskt med hjälp av dynamiska massbalanser. Målet med hydrering av glukos och arabinos är att framställa produkter med en hög förädlingsgrad, nämligen sockeralkoholer, genom katalytisk hydrering. För dessa två system löstes ämnesmängd- och energibalanserna simultant för att evaluera effekter inne i porösa katalysatorpartiklar. Impulsbalanser som bestämmer strömningsbetingelser inne i en kemisk reaktor, ersattes i alla modelleringsstudier med semi-empiriska korrelationsuttryck för vätskans volymandel och tryckförlust och med axiell dispersionsmodell för beskrivning av omblandningseffekter. Genom att justera modellens parametrar kunde reaktorns beteende beskrivas väl. Alla experiment var genomförda i laboratorieskala. En stor mängd av kopplade effekter samexisterade: reaktionskinetik inklusive adsorption, katalysatordeaktivering, mass- och värmeöverföring samt strömningsrelaterade effekter. En del av dessa effekter kunde studeras separat (t.ex. dispersionseffekter och bireaktioner). Inverkan av vissa fenomen kunde ibland minimeras genom en noggrann planering av experimenten. På detta sätt kunde förenklingar i modellerna bättre motiveras. Alla system som studerades var industriellt relevanta. Utveckling av nya, förenklade produktionsteknologier för existerande kemiska komponenter eller nya komponenter är ett gigantiskt uppdrag. Studierna som presenterades här fokuserade på en av den teknisk-vetenskapliga utfärdens första etapper.

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.

Adult education policy in the European Union during the Lisbon decade : the shift to vocational adult learning and work skills matching

This doctoral dissertation investigates the adult education policy of the European Union (EU) in the framework of the Lisbon agenda 2000–2010, with a particular focus on the changes of policy orientation that occurred during this reference decade. The year 2006 can be considered, in fact, a turning point for the EU policy-making in the adult learning sector: a radical shift from a wide--ranging and comprehensive conception of educating adults towards a vocationally oriented understanding of this field and policy area has been observed, in particular in the second half of the so--called ‘Lisbon decade’. In this light, one of the principal objectives of the mainstream policy set by the Lisbon Strategy, that of fostering all forms of participation of adults in lifelong learning paths, appears to have muted its political background and vision in a very short period of time, reflecting an underlying polarisation and progressive transformation of European policy orientations. Hence, by means of content analysis and process tracing, it is shown that the new target of the EU adult education policy, in this framework, has shifted from citizens to workers, and the competence development model, borrowed from the corporate sector, has been established as the reference for the new policy road maps. This study draws on the theory of governance architectures and applies a post-ontological perspective to discuss whether the above trends are intrinsically due to the nature of the Lisbon Strategy, which encompasses education policies, and to what extent supranational actors and phenomena such as globalisation influence the European governance and decision--making. Moreover, it is shown that the way in which the EU is shaping the upgrading of skills and competences of adult learners is modeled around the needs of the ‘knowledge economy’, thus according a great deal of importance to the ‘new skills for new jobs’ and perhaps not enough to life skills in its broader sense which include, for example, social and civic competences: these are actually often promoted but rarely implemented in depth in the EU policy documents. In this framework, it is conveyed how different EU policy areas are intertwined and interrelated with global phenomena, and it is emphasised how far the building of the EU education systems should play a crucial role in the formation of critical thinking, civic competences and skills for a sustainable democratic citizenship, from which a truly cohesive and inclusive society fundamentally depend, and a model of environmental and cosmopolitan adult education is proposed in order to address the challenges of the new millennium. In conclusion, an appraisal of the EU’s public policy, along with some personal thoughts on how progress might be pursued and actualised, is outlined.

Gas-solid two-phase flow in the riser of circulating fluidized beds: mathematical modelling and numerical simulation

A mathematical model is developed for gas-solids flows in circulating fluidized beds. An Eulerian formulation is followed based on the two-fluids model approach where both the fluid and the particulate phases are treated as a continuum. The physical modelling is discussed, including the formulation of boundary conditions and the description of the numerical methodology. Results of numerical simulation are presented and discussed. The model is validated through comparison to experiment, and simulation is performed to investigate the effects on the flow hydrodynamics of the solids viscosity.

Forest contractors entrepreneurial skills development in Finland by Forest Expertise and Innovation Network : project in 2009 - 2013

Julkaisumaa: 578 NO NOR Norja

Visual Arts Data Skills for Researchers (VADS4R)

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

Mathematical modeling and optimal control of malaria

Malaria continues to infect millions and kill hundreds of thousands of people worldwide each year, despite over a century of research and attempts to control and eliminate this infectious disease. Challenges such as the development and spread of drug resistant malaria parasites, insecticide resistance to mosquitoes, climate change, the presence of individuals with subpatent malaria infections which normally are asymptomatic and behavioral plasticity in the mosquito hinder the prospects of malaria control and elimination. In this thesis, mathematical models of malaria transmission and control that address the role of drug resistance, immunity, iron supplementation and anemia, immigration and visitation, and the presence of asymptomatic carriers in malaria transmission are developed. A within-host mathematical model of severe Plasmodium falciparum malaria is also developed. First, a deterministic mathematical model for transmission of antimalarial drug resistance parasites with superinfection is developed and analyzed. The possibility of increase in the risk of superinfection due to iron supplementation and fortification in malaria endemic areas is discussed. The model results calls upon stakeholders to weigh the pros and cons of iron supplementation to individuals living in malaria endemic regions. Second, a deterministic model of transmission of drug resistant malaria parasites, including the inflow of infective immigrants, is presented and analyzed. The optimal control theory is applied to this model to study the impact of various malaria and vector control strategies, such as screening of immigrants, treatment of drug-sensitive infections, treatment of drug-resistant infections, and the use of insecticide-treated bed nets and indoor spraying of mosquitoes. The results of the model emphasize the importance of using a combination of all four controls tools for effective malaria intervention. Next, a two-age-class mathematical model for malaria transmission with asymptomatic carriers is developed and analyzed. In development of this model, four possible control measures are analyzed: the use of long-lasting treated mosquito nets, indoor residual spraying, screening and treatment of symptomatic, and screening and treatment of asymptomatic individuals. The numerical results show that a disease-free equilibrium can be attained if all four control measures are used. A common pitfall for most epidemiological models is the absence of real data; model-based conclusions have to be drawn based on uncertain parameter values. In this thesis, an approach to study the robustness of optimal control solutions under such parameter uncertainty is presented. Numerical analysis of the optimal control problem in the presence of parameter uncertainty demonstrate the robustness of the optimal control approach that: when a comprehensive control strategy is used the main conclusions of the optimal control remain unchanged, even if inevitable variability remains in the control profiles. The results provide a promising framework for the design of cost-effective strategies for disease control with multiple interventions, even under considerable uncertainty of model parameters. Finally, a separate work modeling the within-host Plasmodium falciparum infection in humans is presented. The developed model allows re-infection of already-infected red blood cells. The model hypothesizes that in severe malaria due to parasite quest for survival and rapid multiplication, the Plasmodium falciparum can be absorbed in the already-infected red blood cells which accelerates the rupture rate and consequently cause anemia. Analysis of the model and parameter identifiability using Markov chain Monte Carlo methods is presented.

A mathematical framework for group analysis of von Willebrand factor multimeric composition following luminography

The objective of the present study was to establish a method for quantitative analysis of von Willebrand factor (vWF) multimeric composition using a mathematical framework based on curve fitting. Plasma vWF multimers from 15 healthy subjects and 13 patients with advanced pulmonary vascular disease were analyzed by Western immunoblotting followed by luminography. Quantitative analysis of luminographs was carried out by calculating the relative densities of low, intermediate and high molecular weight fractions using laser densitometry. For each densitometric peak (representing a given fraction of vWF multimers) a mean area value was obtained using data from all group subjects (patients and normal individuals) and plotted against the distance between the peak and IgM (950 kDa). Curves were constructed for each group using nonlinear fitting. Results indicated that highly accurate curves could be obtained for healthy controls and patients, with respective coefficients of determination (r²) of 0.9898 and 0.9778. Differences were observed between patients and normal subjects regarding curve shape, coefficients and the region of highest protein concentration. We conclude that the method provides accurate quantitative information on the composition of vWF multimers and may be useful for comparisons between groups and possibly treatments.

Mathematical modeling of electro-rotation spectra of small particles in liquid solutions: Application to human erythrocyte aggregates

Electro-rotation can be used to determine the dielectric properties of cells, as well as to observe dynamic changes in both dielectric and morphological properties. Suspended biological cells and particles respond to alternating-field polarization by moving, deforming or rotating. While in linearly polarized alternating fields the particles are oriented along their axis of highest polarizability, in circularly polarized fields the axis of lowest polarizability aligns perpendicular to the plane of field rotation. Ellipsoidal models for cells are frequently applied, which include, beside sphere-shaped cells, also the limiting cases of rods and disks. Human erythrocyte cells, due to their particular shape, hardly resemble an ellipsoid. The additional effect of rouleaux formation with different numbers of aggregations suggests a model of circular cylinders of variable length. In the present study, the induced dipole moment of short cylinders was calculated and applied to rouleaux of human erythrocytes, which move freely in a suspending conductive medium under the effect of a rotating external field. Electro-rotation torque spectra are calculated for such aggregations of different length. Both the maximum rotation speeds and the peak frequencies of the torque are found to depend clearly on the size of the rouleaux. While the rotation speed grows with rouleaux length, the field frequency nup is lowest for the largest cell aggregations where the torque shows a maximum.