1. Statistical models : lecture at the Bridging gaps: formal, computational and experimental approaches in linguistics 2023 (FEAL 2023), 2. 8. 2023, Chemnitz, GermanyAhmad Hosseini, 2023, prispevek na konferenci brez natisa Opis: As a collaboration among the University of Nova Gorica (Slovenia), University of Craiova (Romania), and University of Udine (Italy), FEAL 2023 represents an interdisciplinary training opportunity for BA, MA and PhD students from linguistics, applied mathematics, psychology, and neuroscience.
It addresses research topics in contemporary linguistics through formal, computational, and experimental approaches.
In this training opportunity, we will explore some of the most fundamental General Linear Models (GLMs) that have a wide range of applications in various fields. GLMs provide a flexible framework for modeling a variety of data types, including continuous, binary, count, and categorical data, making them an essential tool for any data analyst. During the course, we will briefly cover some GLM models that have applications in diverse fields such as Psychology, Linguistics, Viticulture, Neuroscience, Economics, Biology, and beyond. We will review the basic concepts and tools in GLMs and will discuss how to choose the appropriate model for a given data type and how to interpret the model's output. This course will provide a hands-on learning experience, where you will have the opportunity to apply the concepts you learn to real-world datasets (using SPSS and Excel). We will go as long as time permits to cover as many topics as possible and ensure that you have a good understanding of GLM models and the skills to apply them to your own research projects.
Ključne besede: Experimental Linguistics, Statistical Models, Mathematical and Computational Linguistics, General Linear Models (GLMs)
Objavljeno v RUNG: 06.01.2025; Ogledov: 510; Prenosov: 6
 Povezava na datoteko
Gradivo ima več datotek! Več... |
2. |
3. Search for anisotropy of ultrahigh energy cosmic rays with the Telescope Array experimentT. Abu-Zayyad, Jon Paul Lundquist, 2012, izvirni znanstveni članek Opis: We study the anisotropy of Ultra-High Energy Cosmic Ray (UHECR) events collected by the Telescope Array (TA) detector in the first 40 months of operation. Following earlier studies, we examine event sets with energy thresholds of 10 EeV, 40 EeV, and 57 EeV. We find that the distributions of the events in right ascension and declination are compatible with an isotropic distribution in all three sets. We then compare with previously reported clustering of the UHECR events at small angular scales. No significant clustering is found in the TA data. We then check the events with E > 57 EeV for correlations with nearby active galactic nuclei. No significant correlation is found. Finally, we examine all three sets for correlations with the large-scale structure (LSS) of the universe. We find that the two higher-energy sets are compatible with both an isotropic distribution and the hypothesis that UHECR sources follow the matter distribution of the universe (the LSS hypothesis), while the event set with E > 10 EeV is compatible with isotropy and is not compatible with the LSS hypothesis at 95% CL unless large deflection angles are also assumed. We show that accounting for UHECR deflections in a realistic model of the Galactic magnetic field can make this set compatible with the LSS hypothesis.
Ključne besede: acceleration of particles, astroparticle physics, cosmic rays, magnetic fields, methods: statistical, relativistic processes
Objavljeno v RUNG: 19.05.2020; Ogledov: 4215; Prenosov: 0
Gradivo ima več datotek! Več... |
4. |
5. A search for Galactic transients disguised as gamma-ray burstsAurora Clerici, Cristiano Guidorzi, Valentina La Parola, 2015, izvirni znanstveni članek Opis: A significant fraction of cosmological gamma-ray bursts (GRBs) are characterised by a fast rise and exponential decay (FRED) temporal structure. This is not a distinctive feature of this class, since it is observed in many Galactic transients and is likely descriptive of a sudden release of energy followed by a diffusion process. Possible evidence has recently been reported by Tello et al. (2012) for a Galactic contamination in the sample of FRED GRBs discovered with Swift. We searched for possible Galactic intruders disguised as FRED GRBs in the Swift catalogue up to September 2014. We selected 181 FRED GRBs (2/3 with unknown redshift) and considered different subsamples. We tested the degree of isotropy through the dipole and the quadrupole moment distributions, both with reference to the Galaxy and in a coordinate-system-independent way, as well as with the two-point angular autocovariance function. In addition, we searched for possible indicators of a Galactic origin among the spectral and temporal properties of individual GRBs. We found marginal (~3 sigma) evidence for an excess of FREDs with unknown redshift towards the Galactic plane compared with what is expected for an isotropic distribution corrected for the non-uniform sky exposure. However, when we account for the observational bias against optical follow-up observations of low-Galactic latitude GRBs, the evidence for anisotropy decreases to ~2 sigma. In addition, we found no statistical evidence for different spectral or temporal properties from the bulk of cosmological GRBs. We found marginal evidence for the presence of a disguised Galactic population among Swift GRBs with unknown redshift. The estimated fraction is f=(19 +- 11)%, with an upper limit of 34% (90% confidence).
Ključne besede: gamma-ray burst, statistical, Galactic transient
Objavljeno v RUNG: 03.02.2016; Ogledov: 6160; Prenosov: 0
Gradivo ima več datotek! Več... |
