Robust estimation in linear regression models with fixed effects

In this work we extend the procedure proposed by Peña and Yohai (1999) for computing robust regression estimates in linear models with fixed effects. We propose to calculate the principal sensitivity components associated to each cluster and delete the set of possible outliers based on an appropriate robust scale of the residuals. Some advantage of our robust procedure are: (a) it is computationally low demanding, (b) it is able to avoid the swamping effect often present in similar methods, (c) it is appropriate for contamination in the error term (vertical outliers) and possibly masked high leverage points (horizontal outliers). The performance of the robust procedure is investigated through several simulation studies.Fixed effects models, Outlier detection, Principal sensitivity vector

Reproduction of Poverty and Recent Transformations in Cuban Welfare Regime. Identifying Challenges to Social Equity.

This paper presents a discussion about how current changes in welfare regime in Cuban current context limit poor families capabilities of resilience and opportunities for overcoming poverty From the analysis of contextual changes in welfare regime in the country it is analyzed the role and relationships between State social policies market based transactions and families informal support networks in families coping strategies Based on qualitative methodology the study evidenced a contradiction between the formal tendency to reinforce commodification and familiarization of welfare and the strong dependency poor families have from State support and traditional de-commodificated welfare regime in Cuba This contradiction supposes an essential challenge to social equity in the current process of Actualization of Cuban Development Mode

Reproduction of Poverty and Recent Transformations in Cuban Welfare Regime. Identifying Challenges to Social Equity.

This paper presents a discussion about how current changes in welfare regime in Cuban current context limit poor families capabilities of resilience and opportunities for overcoming poverty From the analysis of contextual changes in welfare regime in the country it is analyzed the role and relationships between State social policies market based transactions and families informal support networks in families coping strategies Based on qualitative methodology the study evidenced a contradiction between the formal tendency to reinforce commodification and familiarization of welfare and the strong dependency poor families have from State support and traditional de-commodificated welfare regime in Cuba This contradiction supposes an essential challenge to social equity in the current process of Actualization of Cuban Development Mode

FROM FAST FASHION TO SUSTAINABLE SLOW FASHION

The objective of this thesis is to express a need for sustainability within the fast fashion industry, in the form of cultural movement that acts as alternative to the current means of production, consumption, and philosophies. Sustainability within current popular discourses is often human-centered and lacking authenticity, thus I aim to highlight an alternative that is opposite of that. In doing such, I bring to light the negative effects of the industry through a case study on the fast fashion company SHEIN, who claim to be making sustainable efforts. I analyzed SHEIN’s 2021 Sustainability and Social Impact Report (SSIR), focusing on the disparities between SHEIN’s rhetoric and the actual sustainable efforts being made, to determine their level of authenticity to sustainability. I uncover negative environmental impacts such as high levels of water consumption, ecosystem disruptions, and disposability that result from the materials used, which lead me to believe SHEIN lacks authenticity to their claims at sustainability. To counter these rapidly increasing effects, I highlight a new philosophy of fashion, one that carries sustainable values and practices. Invented by Kate Fletcher, slow fashion, is the cultural movement needed because it distances itself from the need to feed rising consumer consumption rates, moves away from quickly fading fashion trends, and reduces the speed of production. I highlight slow fashion as a cultural movement because the required sustainable change needed must occur on a cultural level, if it is to create impactful changes. I finalize with possible steps that consumers and companies can take, in order to adopt slow fashion as a new mode of fashion. Key Words: Sustainability, fast fashion, slow fashion, consumer consumption, psychology of consumption, water consumption, ecosystem disruption, philosophy of fashion, rhetoric, and disposability

Non-perturbative running of quark masses in three-flavour QCD

We present our preliminary results for the computation of the non-perturbative running of renormalized quark masses in $N_f = 3$ QCD, between the electroweak and hadronic scales, using standard finite-size scaling techniques. The computation is carried out to very high precision, using massless $\mathcal{O}(a)$-improved Wilson quarks. Following the strategy adopted by the ALPHA Collaboration for the running coupling, different schemes are used above and below a scale $\mu_0 \sim m_b$, which differ by using either the Schr\"odinger Functional or Gradient Flow renormalized coupling. We discuss our results for the running in both regions, and the procedure to match the two schemes.Comment: 7 pages, 3 figures, 34th annual International Symposium on Lattice Field Theor

Non-perturbative quark mass renormalisation and running in Nf=3N_f=3 QCD

We determine from first principles the quark mass anomalous dimension in Nf=3 QCD between the electroweak and hadronic scales. This allows for a fully non-perturbative connection of the perturbative and non-perturbative regimes of the Standard Model in the hadronic sector. The computation is carried out to high accuracy, employing massless O(a)-improved Wilson quarks and finite-size scaling techniques. We also provide the matching factors required in the renormalisation of light quark masses from lattice computations with O(a)-improved Wilson fermions and a tree-level Symanzik improved gauge action. The total uncertainty due to renormalisation and running in the determination of light quark masses in the SM is thus reduced to about 1%.Comment: 41 pages, 10 tables, 7 figures, published version (minimal text improvements

High- to low-latitude teleconnections during glacial terminations associated with ENSO-like variability

Long-term changes in ENSO-like dynamics during deglaciations are linked to southern high-latitude regions through atmospheric and oceanic teleconnection mechanisms

Electro-optical Simulation of a-Si Thin-Film-Transistor Liquid Crystal Display Pixels

An analysis of an amorphous silicon (a-Si) thin-film-transistor liquid-crystal display (TFT-LCD) pixel is presented. The electro-optical model combines the electrical properties of the switching element and the optical performance of a twisted nematic (TN) liquid-crystal cell.Publicad