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Particle Sizing in Geosciences: Explanation of Various Techniques and Pre-treatments
Get PDFThis paper describes different methods for particle characterization, specifically size and shape, from a technical perspective. It emphasizes on analytical procedures in the laboratory, practical challenges and data processing. The content is based on hands-on experience with soil and sediment materials and provides theoretical background information, examples of relevant computations, descriptions of hardware and discussions of using different settings. It is intended to be used as a handbook and may be useful as a guide when designing a local procedure for particle size and shape methods.
To achieve results of the highest quality, attention should be given to the importance of sample handling, relevant pretreatment and dispersion into single, free flowing particles. Equally important is the attention to detail, ranging from proper laboratory working conditions to critical evaluation of data.
One of the main and most important conclusions is the difficulties in comparing data obtained by techniques that measure different properties. This observation does not only apply to particle characterization but is universally applicable.This paper describes different methods for particle characterization, specifically size and shape, from a technical perspective. It emphasizes on analytical procedures in the laboratory, practical challenges and data processing. The content is based on hands-on experience with soil and sediment materials and provides theoretical background information, examples of relevant computations, descriptions of hardware and discussions of using different settings. It is intended to be used as a handbook and may be useful as a guide when designing a local procedure for particle size and shape methods.
To achieve results of the highest quality, attention should be given to the importance of sample handling, relevant pretreatment and dispersion into single, free flowing particles. Equally important is the attention to detail, ranging from proper laboratory working conditions to critical evaluation of data.
One of the main and most important conclusions is the difficulties in comparing data obtained by techniques that measure different properties. This observation does not only apply to particle characterization but is universally applicable
De fattiges ret: Forhandlinger af socialt medborgerskab som status og praksis i stat og kommune, 1849-1892
Get PDFDenne afhandling undersøger hvordan det social medborgerskab blev forhandlet fra Grundloven i 1849 til indførelsen af socialreformerne i begyndelsen af 1890’erne. Med et teoretisk og metodisk afsæt i nyere medborgerskabsstudier, undersøger afhandlingen kommunale medborgerskabsforhandlinger i Aarhus og hvordan disse forhandlinger spillede sammen med udformningen af det nationale medborgerskab. Afhandlingen beskæftiger sig både med formaliserede forhandlinger, der foregik i officielle politiske institutioner, og de mindre formaliserede forhandlinger, der var indlejret i den kommunale forvaltning og som foregik mellem giver og modtager af fattighjælp. Afhandlingen giver et indblik i den danske velfærdsstats historie, en grundig indføring i 1800-tallets fattiglovgivning og fattigforsorg og sætter samtidigt ansigt på de mennesker, der søgte om hjælp fra det offentlige.
Afhandlingen består af 5 dele:
Del 1: Fattigforsorg og medborgerskab.
Del 2: Henvendelser til Aarhus Byråd.
Del 3: Fattighaver.
Del 4: Legater og legatboliger.
Del 5: Ekstraordinær hjælp.
 
Digital Design Literacy in K-12 Education
Get PDFThis dissertation addresses the introduction, sustainment and articulation of digital design literacy in K-12 education. It is the result of my four years of research in the [email protected] research and development project. Within this project, I have researched the topic through constructive design research experiments on both students’ and teachers’ experiences and competencies with digital design as new subject matter in K-12. The contributions presented in this dissertation are positioned within the emerging research field of making in education. The contributions concern new possibilities that making in education creates for K–12 students to develop competencies to design and critique digital technologies. The point of departure for my work was to explore how the implementation of maker settings and technologies might provide novel ways to combine constructionism, design and digital technology with the intention of having students develop digital design literacy. Hence, this dissertation is a response to the question of how to educate K–12 students to understand, use, critically reflect on, and design digital technologies through the emerging educational possibilities enabled by maker activities, maker settings, and maker technologies. The dissertation is comprised of five research papers and two reports framed by an overview that sum up the arguments made in the papers and the contributions from these come together as a whole.
The first contribution is a conceptual understanding of digital design literacy. I lay out a genealogy of traditional literacy toward new literacies to legitimize digital design as a new literacy in K–12 education. I contribute an understanding of how design and digital literacies are interrelated, can mutually benefit one another, and be synthesized and articulated holistically as integrated digital design literacy.
The second contribution are quantitative measures of the state-of-the-actual in terms of students’ digital, design, and critical literacy and an assessment tool for quantitatively evaluating students’ stance towards inquiry, which I argue to be an important competence of digital design literacy.
The third contribution is an understanding of three crucial aspects which must be considered when developing teachers’ capability to teach digital design literacy. I point to impediments for such teaching and to existing practicing teachers’ limited possibilities to meet demands presented by teaching digital design literacy. I contribute a framework for educating reflective design educators who can support students in developing digital design literacy.
The accumulation of these three contributions has resulted in what is the main contribution of this dissertation overview: The Digital Design Literacy Framework. The framework contributes a legitmaziation, articulation and operational definitions of digital design as a new literacy and its underlying competencies
Tværsproglighedens veje: Om sproglig bevidsthed, tværsproglighed og didaktisk forandringsarbejde i en folkeskolekontekst
Get PDFDenne afhandling undersøger potentialer og udfordringer knyttet til et tværfagligt didaktisk forandringsarbejde rettet imod tilvejebringelsen af rum for udvikling af sproglig bevidsthed gennem tværsproglighed i sprogundervisningen på tværs af fagene dansk, engelsk og tysk.
Afhandlingen er baseret på et aktionsforskningsprojekt i folkeskolen i tæt samarbejde med tre lærere og deres to femteklasser. Projektets empiriske materiale er omfattende og mangfoldigt; det analyseres gennem en kompleksitetsorienteret tilgang i tre analytiske lag, der hver fokuserer på et af forskningsspørgsmålets tre centrale interessepunkter: kollaborativt didaktisk forandringsarbejde, tværsproglig didaktik og sproglig bevidsthed i klasserummet.
Analyserne viser kompleksiteten i forandringsarbejdet og i klasserummets praksis, samt udfoldelsen af den tværsproglige didaktiks potentialer på både et tværfagligt og et enkeltfagligt niveau
Joint Dynamics and Adaptive Feedforward Control of Lightweight Industrial Robots
Get PDFThe use of lightweight strain-wave transmissions in collaborative industrial robots leads to structural compliance and a complex nonlinear behavior of the robot joints. Furthermore, wear and temperature changes lead to variations in the joint dynamics behavior over time. The immediate negative consequences are related to the performance of motion and force control, safety, and lead-through programming.This thesis introduces and investigates new methods to further increase the performance of collaborative industrial robots subject to complex nonlinear and time-varying joint dynamics behavior. Within this context, the techniques of mathematical modeling, system identification, and adaptive estimation and control are applied. The methods are experimentally validated using the collaborative industrial robots by Universal Robots.Mathematically, the robot and joint dynamics are considered as two coupled subsystems. The robot dynamics are derived and linearly parametrized to facilitate identification of the inertial parameters. Calibrating these parameters leads to improvements in torque prediction accuracy of 16.5 %-28.5 % depending on the motion.The joint dynamics are thoroughly analyzed and characterized. Based on a series of experiments, a comprehensive model of the robot joint is established taking into account the complex nonlinear dynamics of the strain-wave transmission, that is the nonlinear compliance, hysteresis, kinematic error, and friction. The steady-state friction is considered to depend on angular velocity, load torque, and temperature. The dynamic friction characteristics are described by an Extended Generalized Maxwell-Slip (E-GMS) model which describes in a combined framework; hysteresis characteristics that depend on angular position and Coulomb friction that depend on load torque. E-GMS model-based feedforward control improves the torque prediction accuracy by a factor 2.1 and improve the tracking error by a factor 1.5.An E-GMS model-based adaptive feedforward controller is developed to address the issue of friction changing with wear and temperature. The adaptive control strategy leads to improvements in torque prediction of 84 % and tracking error of 20 %
Visdom og apokalyptik i Qumran-skrifterne
Get PDFGold medal prize dissertation from 2000 with translation and analysis of the then recently published early Jewish wisdom texts from the Dead Sea Scrolls. The Danish title translates to "Wisdom and Apocalypticism in the Qumran Texts." The dissertation was published unrevised but proofread.Guldmedaljeafhandling fra 2000 med oversættelse og analyse af de dengang nyligt udgivne oldjødiske visdomstekster blandt Dødehavsskrifterne. Udgivet uændret, dog med sproglige rettelser
The Sign of the V: Papers in Honour of Sten Vikner
Get PDF‘The Sign of the V’ is a festschrift in honour of Sten Vikner, written by friends, colleagues, and collaborators, present and past, to celebrate both his 60th birthday and his contribution to the field of linguistics. The papers cover a wide range of topics in theoretical and empirical linguistic research, from phonetics and phonology, through morphology, semantics, and syntax, to pragmatics, as well as language acquisition, second-language learning, language processing, language teaching, language contact, historical linguistics, and language variation and change. Many different languages are featured, including the Scandinavian languages (i.e. Danish, Faroese, Icelandic, Norwegian and Swedish), Catalan, Dutch, English, Finnish, West Flemish, French, German, Greek, Italian, Scots, and Yiddish. The scope and depth of the chapters in this anthology is a clear indication of the scope and depth of Sten Vikner’s own comparative research well as his impact on the field of linguistics.‘The Sign of the V’ is a festschrift in honour of Sten Vikner, written by friends, colleagues, and collaborators, present and past, to celebrate both his 60th birthday and his contribution to the field of linguistics. The papers cover a wide range of topics in theoretical and empirical linguistic research, from phonetics and phonology, through morphology, semantics, and syntax, to pragmatics, as well as language acquisition, second-language learning, language processing, language teaching, language contact, historical linguistics, and language variation and change. Many different languages are featured, including the Scandinavian languages (i.e. Danish, Faroese, Icelandic, Norwegian and Swedish), Catalan, Dutch, English, Finnish, West Flemish, French, German, Greek, Italian, Scots, and Yiddish. The scope and depth of the chapters in this anthology is a clear indication of the scope and depth of Sten Vikner’s own comparative research well as his impact on the field of linguistics
Skærm - skærm ikke? Rapport om skolers mobilregler: Hvorfor? Hvordan? Hvad virker?
No full textDenne rapport fra DPU analyserer danske skolers mobilregler i 2018, inklusive deres effekter og årsager, som skolerne selv har observeret dem.Børn og unge bruger en stor del af deres vågne timer i skolesystemet, og mens forskere og professionelle skærmdebattører ordkløves, har lærere, skolebestyrelser og skoleledelser taget stilling.Nogle låser børnenes telefoner inde fra morgenstunden. Andre prøver at inddrage dem i undervisningen for at rumme den digitale side at tilværelsen pædagogisk. De fleste skolers regel er simpelthen, at telefonerne skal blive i tasken. Men vi ved meget lidt om, hvordan forskellige slags mobilregler generelt virker for børn og deres voksne. En systematisk analyse af skolers praksis og erfaringer kan dermed bringe os et langt skridt nærmere viden, der både er empirisk valid og praktisk nyttig.Med over 600 skoler er dette den hidtil største undersøgelse af sin art. Dataene er indsamlet ved telefonisk survey og fortæller dermed skolernes egne historier. Målet er at generere statistisk evidens, men også at bibeholde nuancer og praktiske erfaringer fra skolerne selv. Her er det data, der taler. Hvad oplever skolerne? Hvad gør de hver især? Hvad virker? For leg? For det sociale? For arbejdsro? For teknologiforståelse og selvregulering? Opnår skolerne deres mål? Og hvilke fordele og ulemper har de forskellige praktiske modeller
Glidninger: ’Usynlige’ forandringer inden for pædagogik og uddannelser
Get PDFUdgangspunkt for bogens undersøgelser er en undren over, hvordan og hvorfor udefra initierede forandringer af relationer eller tankemønstre ikke registreres af berørte agenter, hvorfor aspekter af styring og ledelse ubemærket glider ind i tænkning og praksis.
Vort fælles perspektiv i Forskningsenheden: ’Globalisering, governance og ledelse i uddannelsesinstitutioner’ er at undersøge relationerne mellem globale styringstendenser og deres veje gennem transnationale og nationale agenturer til lokale institutioner. Vi undersøger derfor ikke alene disse tendenser, men er i lige så høj grad interesserede i, hvordan styringen påvirker og bearbejdes på niveauerne og af forskningen: Hvordan institutionerne og aktørerne registrerer – eller måske netop ikke registrerer – påvirkningerne, dér, hvor de rammer praksis. Vi arbejder således på at finde og forklare sammenhænge mellem generelle styringstendenser og lokale oplevelser og reaktioner.
Igennem introduktioner til teorier om governance, translationer, diskurser, meningsdannelse og praksis, og igennem brug af teorierne i case analyser indenfor folkeskolen, daginstitutioner, socialpædagogik, voksenuddannelse og universiteter undersøger vi, hvor langt teorierne bringer os, og hvordan de ofte må kombineres eller suppleres for at kunne klargøre vore indsigter.
Undersøgelserne interesserer sig i alle casene både for de generelle styringstendenser og for aktørernes muligheder for demokratisk oplysning og deltagelse i stadig mere komplekse praksissammenhænge.Udgangspunkt for bogens undersøgelser er en undren over, hvordan og hvorfor udefra initierede forandringer af relationer eller tankemønstre ikke registreres af berørte agenter, hvorfor aspekter af styring og ledelse ubemærket glider ind i tænkning og praksis.Vort fælles perspektiv i Forskningsenheden: ’Globalisering, governance og ledelse i uddannelsesinstitutioner’ er at undersøge relationerne mellem globale styringstendenser og deres veje gennem transnationale og nationale agenturer til lokale institutioner. Vi undersøger derfor ikke alene disse tendenser, men er i lige så høj grad interesserede i, hvordan styringen påvirker og bearbejdes på niveauerne og af forskningen: Hvordan institutionerne og aktørerne registrerer – eller måske netop ikke registrerer – påvirkningerne, dér, hvor de rammer praksis. Vi arbejder således på at finde og forklare sammenhænge mellem generelle styringstendenser og lokale oplevelser og reaktioner.Igennem introduktioner til teorier om governance, translationer, diskurser, meningsdannelse og praksis, og igennem brug af teorierne i case analyser indenfor folkeskolen, daginstitutioner, socialpædagogik, voksenuddannelse og universiteter undersøger vi, hvor langt teorierne bringer os, og hvordan de ofte må kombineres eller suppleres for at kunne klargøre vore indsigter.Undersøgelserne interesserer sig i alle casene både for de generelle styringstendenser og for aktørernes muligheder for demokratisk oplysning og deltagelse i stadig mere komplekse praksissammenhænge
Påberåbelsen af lex naturalis i diskussionen om statsmagtens legitimitet i det 16. århundrede
Get PDFPrisopgave om påberåbelsen af lex naturalis i diskussionen om statsmagtens legitimitet i det 16. århundredes lutherske, reformerte og anglikanske teologi, og denne diskussions betydning for opkomsten af den moderne idé om samfunds-kontrakten. Luther, Melanchthon, Bucer og Hooker er inddraget samt udlik til Grotius, Hobbes og Locke.Prisopgave om påberåbelsen af lex naturalis i diskussionen om statsmagtens legitimitet i det 16. århundredes lutherske, reformerte og anglikanske teologi, og denne diskussions betydning for opkomsten af den moderne idé om samfunds-kontrakten. Luther, Melanchthon, Bucer og Hooker er inddraget samt udlik til Grotius, Hobbes og Locke