Publications by authors named "S M Andrew"
Article Synopsis
- Fast radio bursts (FRBs) are brief bursts of radio waves from distant galaxies, and their emission mechanisms are still debated, focusing on processes near a central engine versus shocks at large distances.
- Researchers measured two scintillation scales for FRB 20221022A, one linked to the Milky Way and the other to its host galaxy, which allowed them to determine the FRB's emission region size to be less than 3 x 10 kilometers.
- This size contradicts the large-distance model and suggests that the emission likely occurs close to a central compact object, supported by an observed S-shaped polarization angle, indicating a magnetospheric emission process.
Article Synopsis
- Fast radio bursts (FRBs) are intense signals from deep space that last for milliseconds and share some characteristics with pulsars, suggesting they may originate from neutron stars.
- Despite similarities, FRBs like 20221022A display different patterns in their linear polarization position angle (PA), particularly a 130° rotation that aligns with pulsar behaviors, hinting at magnetospheric origins.
- This study rules out short-period pulsars as potential sources for FRB 20221022A, supporting the idea that its unique PA evolution fits the rotating vector model commonly used for pulsars.
Article Synopsis
- Warmer and variable temperatures are linked to the decline of Atlantic salmon in Eastern Canada, raising concerns about how these temperature changes affect fish swimming performance.
- The study investigates the effects of warm versus cool daily temperature changes on swimming efficiency and overall swimming capabilities in juvenile Atlantic salmon.
- Results show that while acclimation to different thermal profiles didn't significantly impact swimming efficiency, sudden exposure to higher temperatures did elevate metabolic rates, suggesting that salmon can still swim effectively in both warm and cool conditions.
Article Synopsis
- Electronic handgrip dynamometry was used to measure various aspects of muscle function in both upper and lower extremities among resistance-trained adults, but the links between these muscle functions were previously unknown.
- A study involving 30 adults found that strength was significantly correlated between dominant limbs for both upper (r = 0.76) and lower (r = 0.67) extremities, indicating that handgrip strength may reflect overall muscle strength.
- The research highlighted that while strength correlations were common across age groups, differences emerged in RFD and endurance, suggesting that handgrip dynamometry could serve as a valuable tool for assessing muscle function in diverse populations.
This study investigates the dynamics of collaborative characteristics, interpersonal reactivity, and disaster situation responses in non-face-to-face settings, a response mechanism increasingly relevant in the wake of prolonged pandemics. By examining a group of 123 university students engaged in a seven-week non-face-to-face collaborative project, the research identifies relational patterns between collaborative traits such as regulation and efficacy, interpersonal empathy, and responses to disaster situations. The research methodology employs a sophisticated analytical framework comprising factor and canonical correlation analyses to identify how empathy and collaborative efficacy significantly related with disaster response in online collaborations.
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