Quasi-periodic X-ray eruptions years after a nearby tidal disruption event.

Quasi-periodic eruptions (QPEs) are luminous bursts of soft X-rays from the nuclei of galaxies, repeating on timescales of hours to weeks. The mechanism behind these rare systems is uncertain, but most theories involve accretion disks around supermassive black holes (SMBHs) undergoing instabilities or interacting with a stellar object in a close orbit. It has been suggested that this disk could be created when the SMBH disrupts a passing star, implying that many QPEs should be preceded by observable tidal disruption events (TDEs).

Children with Psychogenic Nonepileptic Seizures.

A large multicenter retrospective cohort study was conducted by researchers from the Pediatric Health Information System hospital network to determine differences in demographics, clinical characteristics, testing, treatment, and healthcare use between children aged 8-20 years with epilepsy ( = 13,241) and those with psychogenic nonepileptic seizures (PNES) secondary to conversion disorder ( = 399).

Fast, axis-agnostic, dynamically summarized storage and retrieval for mass spectrometry data.

Mass spectrometry, a popular technique for elucidating the molecular contents of experimental samples, creates data sets comprised of millions of three-dimensional (m/z, retention time, intensity) data points that correspond to the types and quantities of analyzed molecules. Open and commercial MS data formats are arranged by retention time, creating latency when accessing data across multiple m/z. Existing MS storage and retrieval methods have been developed to overcome the limitations of retention time-based data formats, but do not provide certain features such as dynamic summarization and storage and retrieval of point meta-data (such as signal cluster membership), precluding efficient viewing applications and certain data-processing approaches.

JS-MS: a cross-platform, modular javascript viewer for mass spectrometry signals.

Background: Despite the ubiquity of mass spectrometry (MS), data processing tools can be surprisingly limited. To date, there is no stand-alone, cross-platform 3-D visualizer for MS data. Available visualization toolkits require large libraries with multiple dependencies and are not well suited for custom MS data processing modules, such as MS storage systems or data processing algorithms.

Carcinoma in situ is significantly underdetected by prenephroureterectomy ureteroscopy in the management of upper tract urothelial cancers.

Objective. Diagnostic reliability of prenephroureterectomy ureteroscopy (PNU) for the detection of upper tract carcinoma in situ (CIS) remains unproven in particular and underreported in general. Methods.