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Visualizing knowledge in the era of instructional software and gamification : Challenges in design, method and practical use

The present study examines behavioral and metacognitive effects of visualizing acquired knowledge in instructional software. This was done by letting 117 Swedish primary school students use two varieties of an educational game – one with and one without a tool where tokens with knowledge related content were received as proofs of achievement. Although no significant positive impact of the tool was

Making sense of YouTubers : how Swedish children construct and negotiate the YouTuber Misslisibell as a girl celebrity

When children use the Internet, they commonly choose to watch their favorite YouTubers. In this article, we aim to deepen the understanding of how children make sense of YouTubers as a phenomenon, and the role of microcelebrities in children’s everyday life. The study is based on group interviews with 9- and 12-year-old Swedish children, and pays specific attention to how they make sense of the vi

Density-based particle fractionation

We present a label-free method capable of rapidly sorting particles based on their densities. Our device relies on deterministic lateral displacement (DLD) and achieves density fractionation by the use of T-shaped posts. By combining it with a lateral density gradient we achieve a density separation that is independent of size within a range given by the device geometry. Herein we present a proof-

Hydrodynamics in 2 1/2 dimensions : Making jets in a plane

We show that a careful analysis of the Navier-Stokes equation in the low Reynolds number limit has two distinct solutions, one valid for a deep, thin curtain of flow and the other for a thin wide flow. We derive a solution to the latter situation and use the results to develop a new way to control fluid flows in thin, wide sheet flow.

Sorting of biomolecules via microdevices

Micro and nano fabrication techniques have provided an unprecedented opportunity to create a designed world in which separation and fractionation technologies which normally occur on the macroscopic scale can be optimized by designing structures which utilize the basic physics of the process, or new processes can be realized by building structures which normally do not exist without external desig

Novel all-silicon sensor structure with integrated poly-Si electrodes

The interest in miniaturization of modern chemical and medical sensors is steadily increasing. However, when employing methods and fabrication procedures especially developed for microelectronics, one may encounter new and unpredictable problems for applications in aqueous media. For instance, in microelectronics often a dual metal layer system is employed for making electrical contacts. In a solu

Fabrication and characterization of a nanosensor for admittance spectroscopy of biomolecules

We have fabricated nanometer-sized interdigitated electrode patterns using electron beam lithography and liftoff techniques. The aim of the investigation was to find out whether the dimensions (i.e., the electrode separations) of the pattern would affect the admittance signal of the biomolecules in between the electrodes. Since the admittance signal scales with the geometrical factor A/d, where A

Elevkårsengagerade ungdomars syn på skola, vänner, fritid och familj. Första delrapport, Projektet UNG

Stress, Unmanageability, FOMO, and Lack of Recovery: A New Perspective on Adolescent Mental HealthToday, many of the challenges that adolescents face involve mental health issues, some of which have the potential of negatively affecting them for a long time to come. There is, however, at present a lack of a detailed account on the mental health issues experienced by adolescents in Sweden. This stu

Nanowires for Biosensing: Lightguiding of Fluorescence as a Function of Diameter and Wavelength

Semiconductor nanowires can act as nanoscaled optical fibers, enabling them to guide and concentrate light emitted by surface-bound fluorophores, potentially enhancing the sensitivity of optical biosensing. While parameters such as the nanowire geometry and the fluorophore wavelength can be expected to strongly influence this lightguiding effect, no detailed description of their effect on in-coupl

Educational lighting and learning performance

The education of our children is one of the most important assignments for society. The facilities where education is conducted have been seen as one important part of a good educational result. In order to create good facilities the lighting situation has for long been seen as one important factor both concerning daylight and electrical lighting. The chapter describes the development of research

Cone beam CT for QA of synthetic CT in MRI only for prostate patients

Purpose: Magnetic resonance imaging (MRI)-only radiotherapy is performed without computed tomography (CT). A synthetic CT (sCT) is used for treatment planning. The aim of this study was to develop a clinically feasible quality assurance (QA) procedure for sCT using the kV-cone beam CT (CBCT), in an MRI-only workflow for prostate cancer patients. Material and method: Three criteria were addressed;

T2 relaxation time bias in gagCEST at 3T and 7T : comparison of saturation schemes

Purpose: To characterize the effects of water T2 relaxation time in the glycosaminoglycan chemical exchange saturation transfer method (gagCEST) and compare them between 3T and 7T as well as between various saturation schemes. Methods: Simulations and a phantom experiment were conducted at 3T and 7T in a range of water T2 values and GAG concentrations using various saturation schemes. For both sim

Airways exudation of plasma macromolecules : Innate defense, epithelial regeneration, and asthma

This review discusses in vivo airway aspects of plasma exudation in relation to current views on epithelial permeability and epithelial regeneration in health and disease. Microvascular-epithelial exudation of bulk plasma proteins characteristically occurs in asthmatic patients, being especially pronounced in those with severe and exacerbating asthma. Healthy human and guinea pig airways challenge

Binding free energies in the SAMPL6 octa-acid host–guest challenge calculated with MM and QM methods

We have estimated free energies for the binding of eight carboxylate ligands to two variants of the octa-acid deep-cavity host in the SAMPL6 blind-test challenge (with or without endo methyl groups on the four upper-rim benzoate groups, OAM and OAH, respectively). We employed free-energy perturbation (FEP) for relative binding energies at the molecular mechanics (MM) and the combined quantum mecha

Towards knowledge-based integration and visualization of geospatial data using semantic web technologies*

Geospatial data have been pervasive and indispensable for various real-world application of e.g. urban planning, traffic analysis and emergency response. To this end, the data integration and knowledge transfer are two prominent issues for augmenting the use of geospatial data and knowledge. In order to address these issue, Semantic Web technologies have been considerably adopted in geospatial dom

Low-dose irradiated mesenchymal stromal cells break tumor defensive properties in vivo

Solid tumors, including gliomas, still represent a challenge to clinicians and first line treatments often fail, calling for new paradigms in cancer therapy. Novel strategies to overcome tumor resistance are mainly represented by multi-targeted approaches, and cell vector-based therapy is one of the most promising treatment modalities under development. Here, we show that mouse bone marrow-derived

Gonadotropin receptor variants are linked to cumulative live birth rate after in vitro fertilization

Purpose: The objective was to investigate if the gonadotropin receptor variants N680S (N: asparagine, S: serine, rs6166) in the follicle-stimulating hormone receptor (FSHR) and N312S (rs2293275) in the luteinizing hormone/human chorionic gonadotropin receptor (LHCGR) predicted cumulative live birth rate after in vitro fertilization (IVF). Methods: A total of 665 women were consecutively enrolled f

Trophic factors for Parkinson's disease : Where are we and where do we go from here?

Perhaps the most important unmet clinical need in Parkinson's disease (PD) is the development of a therapy that can slow or halt disease progression. Extensive preclinical research has provided evidence for the neurorestorative properties of several growth factors, yet only a few have been evaluated in clinical studies. Attempts to achieve neuroprotection by addressing cell-autonomous mechanisms a

The relationship between formal and informal institutions for governance of public transport

The purpose of this paper is to understand the relationship between the formal (governance established in law) and informal institutions (governance not established in law) that underpin the planning, operation and improvement of local and regional public transport, by using case studies of four countries: Britain (more specifically England, outside London); the Netherlands; Germany; and Sweden. T

Glucagon-like peptide-1 receptor agonists for type 2 diabetes : A rational drug development

Today, glucagon-like peptide-1 (GLP-1) receptor agonists are established glucose-lowering drugs used in the management of type 2 diabetes. Their development emerged from the understanding that a combined islet dysfunction comprising of impaired insulin secretion and exaggerated glucagon secretion is the key defect of hyperglycemia. GLP-1 was shown to target these defects, and after the discovery t