Daniela Opitz
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View article: Polarization position angle standard stars: a reassessment of θ and its variability for seventeen stars based on a decade of observations
Polarization position angle standard stars: a reassessment of θ and its variability for seventeen stars based on a decade of observations Open
Observations of polarization position angle ($\theta$) standards made from 2014 to 2023 with the High Precision Polarimetric Instrument (HIPPI) and other HIPPI-class polarimeters in both hemispheres are used to investigate their variabilit…
View article: Impact of Shared E-scooter Introduction on Public Transport Demand: A Case Study in Santiago, Chile
Impact of Shared E-scooter Introduction on Public Transport Demand: A Case Study in Santiago, Chile Open
This study examines how the introduction of shared electric scooters (e-scooters) affects public transport demand in Santiago, Chile, analyzing whether they complement or substitute for existing transit services. We used smart card data fr…
View article: SEARCHING for BINARY y DWARFS with the GEMINI MULTI-CONJUGATE ADAPTIVE OPTICS SYSTEM (GeMS)
SEARCHING for BINARY y DWARFS with the GEMINI MULTI-CONJUGATE ADAPTIVE OPTICS SYSTEM (GeMS) Open
The NASA Wide-field Infrared Survey Explorer (WISE) has discovered almost all the known members of the new class of Y-type brown dwarfs. Most of these Y dwarfs have been identified as isolated objects in the field. It is known that binarie…
View article: Feel Old Yet? Updating Mode of Transportation Distributions from Travel Surveys using Data Fusion with Mobile Phone Data
Feel Old Yet? Updating Mode of Transportation Distributions from Travel Surveys using Data Fusion with Mobile Phone Data Open
Up-to-date information on different modes of travel to monitor transport traffic and evaluate rapid urban transport planning interventions is often lacking. Transport systems typically rely on traditional data sources providing outdated mo…
View article: Toward Characterizing Cities with Social Media Images Using Activity Recognition, Topic Modeling and Visualization
Toward Characterizing Cities with Social Media Images Using Activity Recognition, Topic Modeling and Visualization Open
Images are at the heart of the digital life, registering what, where, and when people do activities. This rich visual information may allow to characterize cities at spatial granularities unseen with traditional methods. To advance in that…
View article: Imaging and Astrometry for the Coolest Brown Dwarfs
Imaging and Astrometry for the Coolest Brown Dwarfs Open
The discovery of brown dwarfs of the new Y spectral type by the NASA Wide-field Infrared Survey Explorer (WISE) has allowed astronomers to study the physics of the coolest brown dwarfs and determine their prevalence in the Milky Way. This …