Publications by authors named "D Sand"

Dust associated with various stellar sources in galaxies at all cosmic epochs remains a controversial topic, particularly whether supernovae play an important role in dust production. We report evidence of dust formation in the cold, dense shell behind the ejecta-circumstellar medium (CSM) interaction in the Type Ia-CSM supernova (SN) 2018evt three years after the explosion, characterized by a rise in mid-infrared emission accompanied by an accelerated decline in the optical radiation of the SN. Such a dust-formation picture is also corroborated by the concurrent evolution of the profiles of the Hα emission line.

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Article Synopsis
  • Bone scaffolds must be biocompatible and possess properties such as osteoinduction, osteoconductivity, angiogenesis, and mechanical support to enhance cell growth while avoiding inflammation.
  • Gold and silver nanoparticles integrated into bioactive glasses within biopolymer composites have shown promise in promoting bone regeneration through successful testing on cell lines and in a Sprague-Dawley rat model.
  • The composites demonstrated positive biological effects on fibroblast and osteoblast cells without causing cell death, promoting new bone formation after 60 days, with the presence of an apatite layer indicating their bioactivity.
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Gamma-ray bursts (GRBs) are divided into two populations; long GRBs that derive from the core collapse of massive stars (for example, ref. ) and short GRBs that form in the merger of two compact objects. Although it is common to divide the two populations at a gamma-ray duration of 2 s, classification based on duration does not always map to the progenitor.

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Objective: The purpose of this study is to explore the possibility of developing a biomarker that can discriminate early-stage Parkinson's disease from healthy brain function using electroencephalography (EEG) event-related potentials (ERPs) in combination with Brain Network Analytics (BNA) technology and machine learning (ML) algorithms.

Background: Currently, diagnosis of PD depends mainly on motor signs and symptoms. However, there is need for biomarkers that detect PD at an earlier stage to allow intervention and monitoring of potential disease-modifying therapies.

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Precise lead localization is crucial for an optimal clinical outcome of subthalamic nucleus (STN) deep brain stimulation (DBS) treatment in patients with Parkinson's disease (PD). Currently, anatomical measures, as well as invasive intraoperative electrophysiological recordings, are used to locate DBS electrodes. The objective of this study was to find an alternative electrophysiology tool for STN DBS lead localization.

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