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norskBlar i tittel Fakultet for naturvitenskap og teknologi
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Low-Cost Programmable Air Quality Sensor Kits in Science Education
(Chapter; Bokkapittel, 2018-02-21)We describe our citizen science approach and technologies designed to introduce students in upper secondary schools to computational thinking and engineering. Using an Arduino microcontroller and low-cost sensors we have developed the air:bit, a programmable sensor kit that students build and program to collect air quality data. In our course, students develop their own research questions regarding ... -
A low-cost set CRDT based on causal lengths
(Chapter; Bokkapittel, 2020-04)CRDTs, or Conflict-free Replicated Data Types, are data abstractions that guarantee convergence for replicated data. Set is one of the most fundamental and widely used data types. Existing general-purpose set CRDTs associate every element in the set with causal contexts as meta data. Manipulation of causal contexts can be complicated and costly. We present a new set CRDT, CLSet (causal-length set), ... -
Low-dimensionality and predictability of solar wind and global magnetosphere during magnetic storms
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)The storm index SYM-H, the solar wind velocity v, and interplanetary magnetic field Bz show no signatures of low-dimensional dynamics in quiet periods, but tests for determinism in the time series indicate that SYM-H exhibits a significant low-dimensional component during storm time, suggesting that self-organization takes place during magnetic storms. Even though our analysis yields no discernible ... -
Low-frequency noise characterization of silicon-germanium resistors and devices
(Doctoral thesis; Doktorgradsavhandling, 2004-06-03)The main topic of this thesis is experimental low-frequency electrical noise characterization of semiconductor devices. In particular, we concentrate on applications of the silicon-germanium alloy (SiGe). Low-frequency electrical noise is a sensitive measure of defects and non-idealities in semiconductor devices, which directly or indirectly impact device performance and reliability. Thus, it ... -
Low-frequency noise power spectrum density characterizing of SiGe HBTs
(Master thesis; Mastergradsoppgave, 2006-06-06)The main purposes of this thesis are the Low-Frequency Noise measurement of Silicon-Germanium Heterojunction Bipolar Transistors and its Power Spectrum Density Characterizing. The new generation 375 GHZ SiGe HBTs were measured in this work. We show that most of PSDs of the new generation SiGe HBTs have very ”bumpy” spectra which is contributed by GR noise sources. We investigated their basic ... -
Low-frequency radio absorption in Cassiopeia A
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-08)<i>Context</i>: Cassiopeia A is one of the best-studied supernova remnants. Its bright radio and X-ray emission is due to shocked ejecta. Cas A is rather unique in that the unshocked ejecta can also be studied: through emission in the infrared, the radio-active decay of <sup>44</sup>Ti, and the low-frequency free-free absorption caused by cold ionised gas, which is the topic of this paper.<p> ... -
A Low-Intensity Mobile Health Intervention With and Without Health Counseling for Persons With Type 2 Diabetes, Part 1: Baseline and Short-Term Results From a Randomized Controlled Trial in the Norwegian Part of RENEWING HEALTH
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014-12-11) -
The Lower Cretaceous of Svalbard and its relevance for exploration in the northern Barents Sea
(Conference object; Konferansebidrag, 2017)The Lower Cretaceous succession in the Barents Sea is listed as a potential play model by the Norwegian Petroleum Directorate. Reservoirs may occur in deep to shallow marine clastic wedges located in proximity to palaeo-highs and along basin margins. In addition, shelf-prism-scale clinoforms with high amplitude anomalies in their top- and bottomsets have been reported from reflection seismic but ... -
The Lower Cretaceous succession of the northwestern Barents Shelf: Onshore and offshore correlations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-24)The Lower Cretaceous succession in the Barents Sea is listed as a potential play model by the Norwegian Petroleum Directorate. Reservoirs may occur in deep to shallow marine clastic wedges located in proximity to palaeo-highs and along basin margins. In addition, shelf-prism-scale clinoforms with high amplitude anomalies in their top- and bottomsets have been reported from reflection seismic but ... -
Lumikot: Fast auroral transients during the growth phase of substorms
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-25)The development of a magnetospheric substorm may be classified into three phases: growth, expansion, and recovery. The growth phase is important as it includes processes that lead to the expansion. In a recent growth-phase study, a type of fast discrete auroral transient phenomena -- referred to as Lumikot -- were observed. The Lumikot are several kilometers across and move in the high-energy ... -
Luminescence characteristics of Scandinavian quartz, their connection to bedrock provenance and influence on dating results
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-23)The success of optically stimulated luminescence (OSL) dating relies to a large extent on suitable characteristics of the analysed mineral, in this case quartz. Previous OSL dating of Quaternary sediments in Scandinavia has shown that quartz characteristics vary widely across the region, resulting in dating studies with varied success. The aim of this study is to provide an overview of quartz ... -
Luminescence dating of holocene siliciclastic sediments in eastern Dahomey Basin, southwestern Nigeria
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-02)Several attempts at reconstructing geological settings and palaeoclimatic changes of the siliciclastic deposits of the Dahomey Basin, SW Nigeria, using relative age dating and correlation methods, have resulted in serious discrepancies on the ages. Therefore, a chronology framework established by an absolute age dating method is requisite to constrain the geological interpretation. This research ... -
Lumped, constrained cable modeling with explicit state-space formulation using an elastic version of Baumgarte stabilization
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-29)This paper presents a modeling approach for efficient simulation of slender structures, such as wires, cables and ropes. Lumped structural elements are connected using constraints. These are solved explicitly, using an elastic version of Baumgarte stabilization. This avoids singularities in the matrix inversions. The resulting explicit state-space formulation filters the higher order dynamics and ... -
Lærebokas påvirkning på elevers karakternedgang i Biologi 2
(Master thesis; Mastergradsoppgave, 2015-06-01)Denne studien er en analyse av to læreverk og åtte eksamenssett i faget Biologi 2 på videregående skole. Bakgrunnen for studien var Utdanningsdirektoratets karakterstatistikk, hvor det ble fremstilt at elevene gjennomsnittlig gikk ned omtrent én karakter fra standpunkt til skriftlig eksamen. Studien tok utgangspunkt i at oppgavene i læreboka ikke forberedte elevene godt nok til eksamen. Formålet med ... -
Lærebøkers tilrettelegging for problemfylt aktivitet. En mixed methods studie
(Master thesis; Mastergradsoppgave, 2017-05-31)Denne masteroppgaven i matematikkdidaktikk har hatt som formål å finne ut i hvilken grad lærebøker i matematikk legger til rette for problemfylt aktivitet på 8. trinn. For å svare på dette utledet jeg en teoridel omhandlende problemfylt aktivitet i sammenheng med DNR-basert undervisning og spesielt intellektuelt behov. Deretter bygde jeg opp et konseptuelt rammeverk for analyse. Spesielt sentral ble ... -
Læreprosesser ved teknisk avdeling i luftfart. En kvalitativ studie om formell og uformell læring i LT Tech AS
(Master thesis; Mastergradsoppgave, 2015-06-01)Oppgaven tematiserer formelle og uformelle læreprosesser i flyhangaren ved teknisk avdeling i et flyselskap. Feltarbeidet har blitt gjort på LT Tech AS ved Lufttransport AS’ hovedbase i Tromsø. Oppgavens problemstilling er «Hvordan bidrar uformelle læreprosesser i utviklingen av kyndighet og kompetanse hos teknisk personell i LT Tech AS?» I luftfart stilles høye krav til sikkerhet. Så lenge luftfarten ... -
Læreres muligheter til å fremme dybdelæring ved hjelp av koblingsstrategier
(Master thesis; Mastergradsoppgave, 2022-05-31)Masteroppgaven er skrevet på bakgrunn av en interesse for begrepet dybdelæring og undervisningspraksis. Målet med oppgaven er å belyse hvordan koblingsstrategier som er introdusert av Scott et al. (2011), kan benyttes av lærere for å fremme dybdelæring og størrelse forståelse av naturfaget. Gjennomførelsen av studien er gjort i samarbeid med LISSI-prosjektet (Ødegaard et al., 2021), som har undersøkt ... -
Lærerrollen i utforskende undervisning
(Master thesis; Mastergradsoppgave, 2022-05-28)Denne masteren skrives med formål om å se på to aspekter ved lærerrollen i utforskende undervisning. Hvordan læreren tilrettelegger for utforskende undervisning, og hvordan læ-rerrollen vil variere i utforskende undervisning. Oppgaven har som hensikt å øke bevissthe-ten rundt hvilken forventning som er til læreren når det gjelder utforskende undervisning, samtidig som den kan bidra til å legge til ... -
Læring etter en krise i en kommune
(Master thesis; Mastergradsoppgave, 2022-06-01)Samfunnet vårt er konstant under endringer og klimaendringene er en av vår tids største utfordringer. Klimaendringer vil kunne fører til naturkatastrofer som utartes til å bli krise i en kommune. Vi har allerede sett at flere kommuner har blitt rammet av alvorlige flomhendelser det siste tiåret. Klimaframskrivninger tilsier at kommuner på Vestlandet, Sør-Norge og Nordland vil kunne bli rammet av ... -
Læring som drivkraft til organisatorisk resiliens - En studie av læring i politiet under koronakrisen
(Master thesis; Mastergradsoppgave, 2022-01-12)Som den alvorligste krisen Norge har opplevd siden andre verdenskrig, har koronakrisen belyst hvor sårbare organisasjoner er for nye og uforutsette trusler. Politiet har, i likhet med andre organisasjoner, opplevd hvordan pandemien har utfordret kapasiteten i organisasjonen og truet funksjoner i den daglige driften. Dette har fordret evnen til å tenke nytt og omstille seg for å imøtekomme hyppige ...
