Locating the potential development of spatial ability in the Swedish national curriculum.

There exists a plethora of studies that have related pupils' spatial ability to their academic achievement and problem-solving skills, especially in science, technology, engineering, and mathematics (STEM) subjects. However, little is known about how spatial ability could be presented in a national curriculum. To increase the awareness and intention to develop pupils' spatial ability within the national curriculum, the compulsory curriculum document from the Swedish National Agency for Education which details all subject syllabi is examined and analysed using a content analysis method.

Transition to hybrid teaching of mathematics: challenges and coping strategies of Swedish teachers.

Sweden was one of the few countries that did not close down their schools during the Covid-19 pandemic. Different hybrid teaching methods were adopted, some of which are here to stay. This qualitative study explores the challenges that Swedish mathematics teachers had transitioning from face-to-face to hybrid teaching and the coping strategies that they adopted to reduce the effect of these challenges on their practices, well-being and students' learning experiences.

Influence of Air Flow on Luminescence Quenching in Polymer Films towards Explosives Detection Using Drones.

Explosive detection has become an increased priority in recent years for homeland security and counter-terrorism applications. Although drones may not be able to pinpoint the exact location of the landmines and explosives, the identification of the explosive vapor present in the surrounding air provides significant information and comfort to the personnel and explosives removal equipment operators. Several optical methods, such as the luminescence quenching of fluorescent polymers, have been used for explosive detection.

Detection of Explosives by SERS Platform Using Metal Nanogap Substrates.

Detecting trace amounts of explosives to ensure personal safety is important, and this is possible by using laser-based spectroscopy techniques. We performed surface-enhanced Raman scattering (SERS) using plasmonic nanogap substrates for the solution phase detection of some nitro-based compounds, taking advantage of the hot spot at the nanogap. An excitation wavelength of 785 nm with an incident power of as low as ≈0.

Lateral PbS Photovoltaic Devices for High Performance Infrared and Terahertz Photodetectors.

We fabricated a lateral photovoltaic device for use as infrared to terahertz (THz) detectors by chemically depositing PbS films on titanium substrates. We discussed the material properties of PbS films grown on glass with varying deposition conditions. PbS was deposited on Ti substrates and by taking advantage of the Ti/PbS Schottky junction, we discussed the photocurrent transients as well as the room temperature spectrum response measured by Fourier transform infrared (FTIR) spectrometer.