Constructive alignment in Computer Engineering and Informatics departments at Dalarna University : An empirical investigation

Background: Constructive alignment (CA) is a pedagogical approach that emphasizes the alignment between the intended learning outcomes (ILOs), teaching and learning activities (TLAs) and assessment tasks (ATs) as well as creation of a teaching/learning environment where students will be able to actively create their knowledge. Objectives: This paper aims at investigating the extent of constructively-aligned courses in Computer Engineering and Informatics department at Dalarna University, Sweden. This study is based on empirical observations of teacher’s perceptions of implementation of CA in their courses. Methods: Ten teachers (5 from each department) were asked to fill a paper-based questionnaire, which included a number of questions related to issues of implementing CA in courses. Results: Responses to the items of the questionnaire were mixed. Teachers clearly state the ILOs in their courses and try to align the TLAs and ATs to the ILOs. Computer Engineering teachers do not explicitly communicate the ILOs to the students as compared to Informatics teachers. In addition, Computer Engineering teachers stated that their students are less active in learning activities as compared to Informatics teachers. When asked about their subjective ratings of teaching methods all teachers stated that their current teaching is teacher-centered but they try to shift the focus of activity from them to the students. Conclusions: From teachers’ perspectives, the courses are partially constructively-aligned. Their courses are “aligned”, i.e. ILOs, TLAs and ATs are aligned to each other but they are not “constructive” since, according to them, there was a low student engagement in learning activities, especially in Computer Engineering department.

The illusion of creation of the text

Is it really possible to create a (literary) text? It is actually impossible as to create an authentic text we need an authentic context which is impossible to create. So all the literary txets we have are not authentic and are not created authentically.

"Att gå med det i huvudet"-vägen från text till föreställning. : En scenografs arbetsprocess

Jag har försökt att sammanställa dels en enskild scenografs; Calle von Gegerfelts arbetsprocess i successiva steg, för att se hur denne arbetar fram en scenografi, dels har jag i en tabell försökt sammanställa flera scenografers arbetsprocesser för att se om det finns steg som är lika, och som gäller för flera scenografer. I resultatet av dessa sammanställningar har jag kunnat se hur von Gegerfelt steg för steg arbetar fram sin scenografi ända fram till teaterhändelsen. Det har framkommit att han har en lång process med rent tankearbete där omedvetna processer är tydliga och hur dessa successivt övergår till mer konkret arbete med händerna, för att till sist lämna över själva byggandet av scenografin och sömnaden av kläderna till andra. Vissa av dessa steg har han gemensamt med andra scenografer, men dessa har beskrivit de stegen med andra ord och på annat sätt, men man kan se att de hör ihop.

Improved Road Design for Future Maintenance - Analysis of Road Barrier Repair Costs

The cost of a road construction over its service life is a function of the design, quality of construction, maintenance strategies and maintenance operations. Unfortunately, designers often neglect a very important aspect which is the possibility to perform future maintenance activities. The focus is mainly on other aspects such as investment costs, traffic safety, aesthetic appearance, regional development and environmental effects. This licentiate thesis is a part of a Ph.D. project entitled “Road Design for lower maintenance costs” that aims to examine how the life-cycle costs can be optimized by selection of appropriate geometrical designs for the roads and their components. The result is expected to give a basis for a new method used in the road planning and design process using life-cycle cost analysis with particular emphasis on road maintenance. The project started with a review of literature with the intention to study conditions causing increased needs for road maintenance, the efforts made by the road authorities to satisfy those needs and the improvement potential by consideration of maintenance aspects during planning and design. An investigation was carried out to identify the problems which obstruct due consideration of maintenance aspects during the road planning and design process. This investigation focused mainly on the road planning and design process at the Swedish Road Administration. However, the road planning and design process in Denmark, Finland and Norway were also roughly evaluated to gain a broader knowledge about the research subject. The investigation was carried out in two phases: data collection and data analysis. Data was collected by semi-structured interviews with expert actors involved in planning, design and maintenance and by a review of design-related documents. Data analyses were carried out using a method called “Change Analysis”. This investigation revealed a complex combination of problems which result in inadequate consideration of maintenance aspects. Several urgent needs for changes to eliminate these problems were identified. Another study was carried out to develop a model for calculation of the repair costs for damages of different road barrier types and to analyse how factors such as road type, speed limits, barrier types, barrier placement, type of road section, alignment and seasonal effects affect the barrier damages and the associated repair costs. This study was carried out using a method called the “Case Study Research Method”. Data was collected from 1087 barrier repairs in two regional offices of the Swedish Road Administration, the Central Region and the Western Region. A table was established for both regions containing the repair cost per vehicle kilometre for different combinations of barrier types, road types and speed limits. This table can be used by the designers in the calculation of the life-cycle costs for different road barrier types.

Characterization of residential chimney conditions for flue gas flow measurements

A literature survey and a theoretical study were performed to characterize residential chimney conditions for flue gas flow measurements. The focus is on Pitot-static probes to give sufficient basis for the development and calibration of a velocity pressure averaging probe suitable for the continuous dynamic (i.e. non steady state) measurement of the low flow velocities present in residential chimneys. The flow conditions do not meet the requirements set in ISO 10780 and ISO 3966 for Pitot-static probe measurements, and the methods and their uncertainties are not valid. The flow velocities in residential chimneys from a heating boiler under normal operating condi-tions are shown to be so low that they in some conditions result in voiding the assumptions of non-viscous fluid justifying the use of the quadratic Bernoulli equation. A non-linear Reynolds number dependent calibration coefficient that is correcting for the viscous effects is needed to avoid significant measurement errors. The wide range of flow velocity during normal boiler operation also results in the flow type changing from laminar, across the laminar to turbulent transition region, to fully turbulent flow, resulting in significant changes of the velocity profile during dynamic measurements. In addition, the short duct lengths (and changes of flow direction and duct shape) used in practice are shown to result in that the measurements are done in the hydrodynamic entrance region where the flow velocity profiles most likely are neither symmetrical nor fully developed. A measurement method insensitive to velocity profile changes is thus needed, if the flow velocity profile cannot otherwise be determined or predicted with reasonable accuracy for the whole measurement range. Because of particulate matter and condensing fluids in the flue gas it is beneficial if the probe can be constructed so that it can easily be taken out for cleaning, and equipped with a locking mechanism to always ensure the same alignment in the duct without affecting the calibration. The literature implies that there may be a significant time lag in the measurements of low flow rates due to viscous effects in the internal impact pressure passages of Pitot probes, and the significance in the discussed application should be studied experimentally. The measured differential pressures from Pitot-static probes in residential chimney flows are so low that the calibration and given uncertainties of commercially available pressure transducers are not adequate. The pressure transducers should be calibrated specifically for the application, preferably in combination with the probe, and the significance of all different error sources should be investigated carefully. Care should be taken also with the temperature measurement, e.g. with averaging of several sensors, as significant temperature gradients may be present in flue gas ducts.

Optical Characterization and Optimization of Display Components : Some Applications to Liquid-Crystal-Based and Electrochromics-Based Devices

This dissertation is focused on theoretical and experimental studies of optical properties of materials and multilayer structures composing liquid crystal displays (LCDs) and electrochromic (EC) devices. By applying spectroscopic ellipsometry, we have determined the optical constants of thin films of electrochromic tungsten oxide (WOx) and nickel oxide (NiOy), the films’ thickness and roughness. These films, which were obtained at spattering conditions possess high transmittance that is important for achieving good visibility and high contrast in an EC device. Another application of the general spectroscopic ellipsometry relates to the study of a photo-alignment layer of a mixture of azo-dyes SD-1 and SDA-2. We have found the optical constants of this mixture before and after illuminating it by polarized UV light. The results obtained confirm the diffusion model to explain the formation of the photo-induced order in azo-dye films. We have developed new techniques for fast characterization of twisted nematic LC cells in transmissive and reflective modes. Our techniques are based on the characteristics functions that we have introduced for determination of parameters of non-uniform birefringent media. These characteristic functions are found by simple procedures and can be utilised for simultaneous determination of retardation, its wavelength dispersion, and twist angle, as well as for solving associated optimization problems. Cholesteric LCD that possesses some unique properties, such as bistability and good selective scattering, however, has a disadvantage – relatively high driving voltage (tens of volts). The way we propose to reduce the driving voltage consists of applying a stack of thin (~1µm) LC layers. We have studied the ability of a layer of a surface stabilized ferroelectric liquid crystal coupled with several retardation plates for birefringent color generation. We have demonstrated that in order to accomplish good color characteristics and high brightness of the display, one or two retardation plates are sufficient.

Layout och typografi i vetenskapliga artiklar : En kartläggning av konventioner gällande grafisk formgivning inom matematik, medicin och utbildningsvetenskap

En deskriptiv visuell innehållsanalys genomfördes med en korpus bestående av vetenskapliga artiklar från 30 topprankade tidskrifter jämnt fördelade på de tre disciplinerna matematik, medicin och utbildningsvetenskap, med syfte att undersöka om det fanns ett samband mellan tidskrifternas disciplintillhörighet och den grafiska formgivningen. Kartläggningen omfattade layout (bl.a. sidformat, spalter, marginalstorlek, användning av grafiska element, placering av tabeller, figurer och pagina) och typografiskt utseende hos titel, rubriker, brödtext och abstrakt (t.ex. teckenstorlek, textjustering, teckengrovlek, typsnitt, färg och radavstånd). Resultaten visar att disciplinerna använde olika men även gemensamma konventioner i sitt grafiska utseende. Matematik uppvisade enkelspaltig layout med liten typografisk variation, genomgående användning av typsnitt från familjen Transitional eller Transitional/Didone för hela dokumentet, avsaknad av kulört färg och sällan användning av grafiska element. Medicin uppvisade större variation med användning av kulört färg, icke-centrerad typografi med både sansseriff- och seriff-typsnitt, grafiska element och ramar som förstärker det ofta använda dubbelspaltiga gridsystemet. Utbildningsvetenskap uppvisade en grafisk design som återfanns i båda disciplinerna, men påminde mest om matematik till utseendet. Kodbok ingår i sin helhet som bilaga. Uppsatsen i sig är delvis formgiven med utgångspunkt i de erhållna resultaten.

Hur fyra lärare arbetar med textsamtal i årskurs 4-6 : En studie om hur fyra lärare arbetar med textsamtal i syfte att bearbeta en text, samt vilka förmågor som kan utvecklas hos eleverna.

Syfte: Syftet med denna studie var att undersöka hur fyra lärare i grundskolan årskurs 4-6 arbetar med textsamtal i svenskundervisningen. Syftet var också att lyfta fram de förmågor som elever kan utveckla vid textsamtal samt pedagogens betydelse för textsamtalets genomförande. Utifrån syftet har följande frågeställningar formulerats. Dessa är: 1. Hur arbetar fyra lärare med textsamtal i svenskundervisningen i årskurs 4-6? 2. Vilken kunskap bör pedagogen ha för att kunna genomföra samtal om texter enligt de deltagande lärarna? 3. Hur vanligt förekommande är samtal om texter i grundskolan årskurs 4-6 rent generellt enligt de deltagande lärarna? 4. Vilka förmågor anser de intervjuade lärarna att elever kan utveckla vid samtal om texter? Metod: Den metod som har använts för att genomföra denna empiriska studie är observation och intervju. Urvalet som gjordes var att begränsa observationerna till fyra lektionstillfällen med fyra olika lärare. Den intervjuform som kändes mest lämplig att använda för detta ändamål var en halvstrukturerad ansats med ett kvalitativt utgångsläge. Resultat och analys: Resultatet visar att de fyra deltagande lärarna har en medvetenhet kring vad ett textsamtal innebär. Denna kunskap är en följd av att lärarna helt eller delvis använder sig av ett färdigt arbetsmaterial i undervisningen. I materialet ingår strukturerade textsamtal. Den slutsats som kan göras efter att ha genomfört både observationer och intervjuer, är att endast en lärare säger sig arbeta medvetet, regelbundet och strukturerat med textsamtal i undervisningen. Det var dock inget som observerades under lektionen jag deltog i. En av lärarna säger också att hon arbetar medvetet och strukturerat med aktiviteten men menar att det är svårt att få tiden att räcka till. De övriga två arbetar inte med textsamtal i undervisningen men den ena läraren uppger att hon använder sig av öppna frågor rent generellt i undervisningen. Ett tryggt klassrumsklimat, goda ämneskunskaper, kunskap i att ställa rätt frågor samt att vara förberedd är förmågor som benämns som betydelsefulla för att textsamtal ska kunna äga rum. Ingen av lärarna uppger att de tror att textsamtal är vanligt förekommande i skolan. Samtliga intervjuade lärare uppger ett antal förmågor som de menar att eleverna kan utveckla vid samtal om texter. Dessa är förmågan att kommunicera, förmågan att lyssna på andra, förmågan att uttrycka egna åsikter samt att kunna reflektera, analysera och bygga vidare på resonemang.