Diego Stalder
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Measurements of Forbush Decrease Events at the Center of the South Atlantic Magnetic Anomaly With Muon Detectors Open
We present the construction and validation of a low‐cost muon detector in Paraguay, located at the center of the South Atlantic Magnetic Anomaly (SAMA), where the geomagnetic cutoff rigidity is 9.63 GV. The detector consists of plastic sci…
A new effective flow model for formations with spatially varying fracture statistics Open
Fractures serve as highly conductive flow conduits in subsurface formations and thus have a significant impact on flow and transport. The length of fractures can vary over several orders of magnitude, with the largest fractures potentially…
View article: Search for Reactor-Produced Millicharged Particles with Skipper-CCDs at the CONNIE and Atucha-II Experiments
Search for Reactor-Produced Millicharged Particles with Skipper-CCDs at the CONNIE and Atucha-II Experiments Open
Millicharged particles, proposed by various extensions of the standard model, can be created in pairs by high-energy photons within nuclear reactors and can interact electromagnetically with electrons in matter. Recently, the existence of …
View article: Search for reactor-produced millicharged particles with Skipper-CCDs at the CONNIE and Atucha-II experiments
Search for reactor-produced millicharged particles with Skipper-CCDs at the CONNIE and Atucha-II experiments Open
Millicharged particles, proposed by various extensions of the standard model, can be created in pairs by high-energy photons within nuclear reactors and can interact electromagnetically with electrons in matter. Recently, the existence of …
View article: Searches for CEνNS and Physics beyond the Standard Model using Skipper-CCDs at CONNIE
Searches for CEνNS and Physics beyond the Standard Model using Skipper-CCDs at CONNIE Open
The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) aims to detect the coherent scattering (CE$ν$NS) of reactor antineutrinos off silicon nuclei using thick fully-depleted high-resistivity silicon CCDs. Two Skipper-CCD sensors wi…
View article: Skipper-CCD sensors for the Oscura experiment: requirements and preliminary tests
Skipper-CCD sensors for the Oscura experiment: requirements and preliminary tests Open
Oscura is a proposed multi-kg skipper-CCD experiment designed for a dark matter (DM) direct detection search that will reach unprecedented sensitivity to sub-GeV DM-electron interactions with its 10 kg detector array. Oscura is planning to…
Small Radio Telescope for Observing the Neutral Hydrogen Line of the Milky Way Open
Small radio telescopes make it possible to observe the hydrogen emission line of 21 cm at 1420 MHz and to demonstrate the presence of dark matter by measuring the galactic rotation curve of the Milky Way.This paper presents the design, int…
Hyperparameter Optimization of Deep Learning Model for Short-Term Electricity Demand Forecasting Open
Short-term electricity demand forecasting represents a fundamental tool for decision-making by entities engaged in electricity management since it allows the development of strategies to meet variations in electricity demand in short perio…
Design and Fabrication of a Large GTEM Cell for Electromagnetic Compatibility Testing Open
One mandatory requirement for validating new electronic devices and machines is electromagnetic compatibility (EMC) tests because any new design can emit or receive unwanted electrical interference, affecting the operation of other systems…
Feature Selection within Time Series Clustering: A Case Study of Dengue in Paraguay Open
In recent decades, the world has experienced a health crisis due to increased infectious disease cases such as COVID-19, Dengue, Zika, etc. Dengue is a neglected tropical disease transmitted by mosquito vectors, mainly by the Aedes Aegypti…
View article: Searching for millicharged particles with 1 kg of Skipper-CCDs using the NuMI beam at Fermilab
Searching for millicharged particles with 1 kg of Skipper-CCDs using the NuMI beam at Fermilab Open
Oscura is a planned light-dark matter search experiment using Skipper-CCDs with a total active mass of 10 kg. As part of the detector development, the collaboration plans to build the Oscura Integration Test (OIT), an engineering test with…
SIR-SI model with a Gaussian transmission rate: Understanding the dynamics of dengue outbreaks in Lima, Peru Open
Introduction Dengue is transmitted by the Aedes aegypti mosquito as a vector, and a recent outbreak was reported in several districts of Lima, Peru. We conducted a modeling study to explain the transmission dynamics of dengue in three of t…
View article: Skipper-CCD Sensors for the Oscura Experiment: Requirements and Preliminary Tests
Skipper-CCD Sensors for the Oscura Experiment: Requirements and Preliminary Tests Open
Oscura is a proposed multi-kg skipper-CCD experiment designed for a dark matter (DM) direct detection search that will reach unprecedented sensitivity to sub-GeV DM-electron interactions with its 10 kg detector array. Oscura is planning to…
Temperature-based Dengue Outbreaks Modelling with Exogenous Variables Open
Dengue fever is an endemic disease, present in tropical and subtropical regions, transmitted by the Aedes Aegypti mosquito vector. It has recently appeared in non-tropical regions with dry weather. This represents a setback for advanced te…
PytuTester: RaspberryPi open-source ventilator tester Open
PytuTester is an open-source ventilator tester developed to help bio-engineers in the design and verification of new ventilator prototypes. A ventilator tester allows measuring the flow, pressure, volume, and oxygen concentration provided …
Simulated Early Type Galaxies Open
We created various ensemble simulated images, to extensively test various aspects of GALPHAT under a variety of circumstances: (1) varying $r_{e}$ and the shape parameter $n$ as a function of S/N and PSF FWHM (Ensemble A); (2) varying the …
Building 1U CubeSat as a Tool to Promote Project-Based Learning in Paraguay, a Case Study Open
In this work, the design and build of a nanosatellite as an effective STEM teaching tool is presented. Encouraging project-based learning in Paraguayan schools, on such an attractive topic, would give the advantage of inspiring local stude…
Deep Learning-Based Dengue Cases Forecasting with Synthetic Data Open
Dengue fever is a viral disease transmitted to humans mainly by the Aedes aegypti mosquito acting as a vector, with greater incidence in urban areas. Worldwide, an estimation indicates that in tropical and sub-tropical countries, approxima…
Stellar population properties of ETGs in compact groups of galaxies Open
We present results on the study of the stellar population in early-type galaxies (ETGs) belonging to 151 compact groups (CGs). We also selected a field sample composed of 846 ETGs to investigate environmental effects on galaxy evolution. W…
Gradient pattern analysis applied to galaxy morphology Open
Gradient pattern analysis (GPA) is a well-established technique for measuring gradient bilateral asymmetries of a square numerical lattice. This paper introduces an improved version of GPA designed for galaxy morphometry. We show the perfo…
A New Parallel Algorithm for modeling the Elliptical Galaxies Surface Brightness in GPUs Open
A tsunami of data is coming up, large telescopes are gathering images of millions of galaxies in the Universe [3]. Galaxy evolution is inferred and described by analyzing the galaxy structure and properties [1]. [...]
Bayesian surface photometry analysis for early-type galaxies Open
We explore the application of Bayesian image analysis to infer the properties of an SDSS early-type galaxy sample including AGN. We use GALPHAT (Yoon et al. 2010) with a Bayes-factor model comparison to photometrically infer an AGN populat…
Group galaxy number density profiles far out: Is the ‘one-halo’ term NFW out to >10 virial radii? Open
While the density profiles (DPs) of Lambda cold dark matter haloes obey the Navarro, Frenk & White (NFW) law out to roughly one virial radius, rvir, the structure of their outer parts is still poorly understood, because the one-halo term d…