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khoshtinat--mohadeseh
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Detecting and Mitigating Gender Bias in Language Models
, M.Sc. Thesis Sharif University of Technology ; Beigy, Hamid (Supervisor)
Abstract
Recent advancements in deep learning methods have led to significant progress in Language Models. However, training these models on vast amounts of real-world and internet data has resulted in gender bias. Given the increasing application of these models, identifying and mitigating this bias is of particular importance. Previous efforts to address this issue often required extensive datasets, long training times, and heavy hardware resources, which also led to the forgetting of the model’s prior knowledge. Furthermore, existing evaluation metrics only assessed bias across the entire dataset and did not consider different topics separately. Therefore, the dependency of these metrics on...
Investigating the Cosmic Web with the One-point Letter Function Statistics in the Presence of Massive Neutrinos
, Ph.D. Dissertation Sharif University of Technology ; Baghram, Shant (Supervisor)
Abstract
The standard model of cosmology—the ΛCDM model, successfully predicted almost all the observations from the Cosmic Microwave Background and the Large-Scale Structure surveys. However, as the observational data sets become more accurate and finer on small scales, the deviations between the predicted and observed quantities increase. In addition to the tensions arising from observational data, fundamental questions about the nature of the dark sector of the Universe have given rise to a rich literature around the possible extension of the ΛCDM, to mention a few, the decided massive neutrino inclusion, the interacting and/or clustering dark energy, and deviation from Gaussian initial condition....
One-point statistics in various cosmic environments in the presence of massive neutrinos
, Article Monthly Notices of the Royal Astronomical Society ; Volume 534, Issue 2 , 2024 , Pages 1166-1174 ; 00358711 (ISSN) ; Hatamnia, H ; Baghram, S ; Sharif University of Technology
2024
Abstract
Studying the structures (haloes and galaxies) within the cosmic environments (void, sheet, filament, and node) where they reside is an ongoing attempt in cosmological studies. The link between the properties of structures and the cosmic environments may help to unravel the nature of the dark sector of the Universe. In this paper, we study the cosmic web environments from the spatial pattern perspective in the context of Lambda cold dark matter ($/Lambda$ CDM) and $/nu /Lambda$ CDM as an example of an extension to the vanilla model. To do this, we use the T-web classification method and classify...
Clustering of dark matter in the cosmic web as a probe of massive neutrinos
, Article Monthly Notices of the Royal Astronomical Society ; Volume 531, Issue 1 , 2024 , Pages 575-584 ; 00358711 (ISSN) ; Ansarifard, M ; Hassani, F ; Baghram, S ; Sharif University of Technology
2024
Abstract
The large-scale structure of the Universe is distributed in a cosmic web. Studying the distribution and clustering of dark matter particles and haloes may open up a new horizon for studying the physics of the dark Universe. In this work, we investigate the nearest neighbour statistics and spherical contact function in cosmological models with massive neutrinos. For this task, we use the relativistic N-body code, gevolution, and study particle snapshots at three different redshifts. In each snapshot, we find the haloes and evaluate the letter functions for them. We show that a generic behaviour can be found in the nearest neighbour, G(r), and spherical contact functions, F(r), which makes...