Search results for "Diagram"
showing 10 items of 795 documents
Scaffolding self-regulated learning from causal-relations texts: Diagramming and self-assessment to improve metacomprehension accuracy?
2023
AbstractThe accuracy of students’ relative comprehension judgments when reading texts is typically rather low. This has been ascribed to students grounding their comprehension judgments on cues that are not diagnostic of their actual comprehension level. Asking students to complete causal diagrams—a diagramming scaffold—before judging comprehension has proved effective in providing them with more diagnostic cues and thereby fostered metacomprehension accuracy and self-regulated learning. However, there is still room for improvement. We investigated experimentally whether adding the instruction to students to self-assess their causal diagrams: (1) would lead to more accurate judgments than c…
Diagrammu valoda augsta līmeņa kvantu procesu reprezentācijai
2015
Pēdējo gadu laikā Oksfordas Universitātē profesora Boba Koekes vadībā ir uzsākta jaunas diagrammu valodas izveide un attīstīšana. Diagrammu valodas iecerētais pamatpielietojums – kvantu procesu attēlošana tādā veidā, lai uzskatāmi atainotu kvantu informācijas plūsmu un kvantu algoritmu struktūru, kā arī lai sniegtu intuitīvu priekšstatu par kvantu parādību norisi. Darbā diagrammu formālisms ir nevis aprakstīts no abstraktā, matemātiski pašpietiekamā skatpunkta, bet gan skaidroti galvenie darbības principi, balstoties uz labi zināmo Diraka formālismu. Rezultātā iegūta pirmā mācību literatūra latviešu valodā. Darbā apkopotā informācija sniedz labu zināšanu bāzi, lai, iepazīstoties ar darba sa…
Multispectral analysis of color vision deficiency tests
2011
Color deficiency tests are usually produced by means of polygraphy technologies and help to diagnose the type and severity of the color deficiencies. Due to different factors, as lighting conditions or age of the test, standard characteristics of these tests fail, thus not allowing diagnosing unambiguously the degree of different color deficiency. Multispectral camera was used to acquire the spectral images of the Ishihara and Rabkin pseudoisochromatic plates in the visible spectrum. Spectral data was converted to cone signals, and successive mathematics applied to provide a simple simulation of the test performance. Colorimetric data of the each pixel of the test image can be calculated an…
Rhombi-chain Bose-Hubbard model: Geometric frustration and interactions
2018
We explore the effects of geometric frustration within a one-dimensional Bose-Hubbard model using a chain of rhombi subject to a magnetic flux. The competition of tunnelling, self-interaction and magnetic flux gives rise to the emergence of a pair-superfluid (pair-Luttinger liquid) phase besides the more conventional Mott-insulator and superfluid (Luttinger liquid) phases. We compute the complete phase diagram of the model by identifying characteristic properties of the pair-Luttinger liquid phase such as pair correlation functions and structure factors and find that the pair-Luttinger liquid phase is very sensitive to changes away from perfect frustration (half-flux). We provide some propo…
Migrācijas biogrāfijas jauniešu mobilitātes izpētē
2019
Jauniešu mobilitāte ir nozīmīgs pētījumu virziens migrācijas literatūrā. Jaunieši ir ģeogrāfiski ļoti mobila iedzīvotāju grupa. Migrācijas izpētē iedzīvotāju pārvietošanās bieži tiek skatīta cilvēka dzīves gājuma kontekstā. Šajā darbā pētītas vienas Rīgas ģimnāzijas klases absolventu migrācijas biogrāfijas, lai labāk izprastu jauniešu migrācijas komplekso raksturu Latvijā. Pētījumā izmantota mikro analītiskā pieeja jauniešu migrācijas izpētē, bet nepieciešamie dati iegūti ar padziļinātu un strukturētu interviju palīdzību. Darba rezultāti atklāj jauniešu privātās un profesionālās dzīves notikumu saikni ar ģeogrāfiskās mobilitātes procesiem. Jauniešu dzīvesvietas izvēli visbiežāk ietekmē stud…
Blends of Semiflexible Polymers: Interplay of Nematic Order and Phase Separation
2021
Mixtures of semiflexible polymers with a mismatch in either their persistence lengths or their contour lengths are studied by Density Functional Theory and Molecular Dynamics simulation. Considering lyotropic solutions under good solvent conditions, the mole fraction and pressure is systematically varied for several cases of bending stiffness κ (the normalized persistence length) and chain length N. For binary mixtures with different chain length (i.e., NA=16, NB=32 or 64) but the same stiffness, isotropic-nematic phase coexistence is studied. For mixtures with the same chain length (N=32) and large stiffness disparity (κB/κA=4.9 to 8), both isotropic-nematic and nematic-nematic unmixing oc…
Pulsating B and Be stars in the Small Magellanic Cloud
2008
Context: Stellar pulsations in main-sequence B-type stars are driven by the kappa-mechanism due to the Fe-group opacity bump. The current models do not predict the presence of instability strips in the B spectral domain at very low metallicities. As the metallicity of the SMC is lower than Z=0.005, it constitutes a very suitable object to test these predictions. Aims: The main objective is to investigate the existence of B-type pulsators at low metallicities, searching for short-term periodic variability in absorption-line B and Be stars in the SMC. The analysis has been performed in a sample of 313 B and Be stars with fundamental astrophysical parameters accurately determined from high-res…
On a numerical solution of the Maxwell equations by discrete exterior calculus
2014
Digital control circuitry for the p53 dynamics in cancer cell and apoptosis
2010
Abstract Experimental work and theoretical models deduce a “digital” response of the p53 transcription factor when genomic integrity is damaged. The mutual influence of p53 and its antagonist, the Mdm2 oncogene, is closed in a feedback. This paper proposes an aerospace-based architecture for translating the p53/Mdm2/DNA damage network into a digital circuitry in which the optimal control theory is applied for obtaining the requested dynamic evolutions of some considered cell species for repairing a DNA damage. The purpose of this paper is to demonstrate the usefulness of such digital circuitry design to detect and predict the cell species dynamics for shedding light on their inner and mutua…
Optimization of BESS Capacity Under a Peak Load Shaving Strategy
2018
Battery energy storage systems (BESSs) are becoming increasingly competitive in the global energy landscape, thanks to the strong cost reduction that has taken place in recent years and it is expected to continue in the next future. Among the many benefits BESSs can provide, time shifting can be exploited by electricity consumers to save on the electricity bill, charging the storage during the off-peak hours and discharging when the cost of electricity is high. This paper describes a simple procedure to optimize the BESS capacity under a peak load shaving strategy, in presence of a time-of-use (TOU) electricity rate, able to guarantee, at the same time, the flattest daily power diagram and …