PoliTO-IIT Submission to the EPIC-KITCHENS-100 Unsupervised Domain Adaptation Challenge for Action Recognition

In this report, we describe the technical details of our submission to the EPIC-Kitchens-100 Unsupervised Domain Adaptation (UDA) Challenge in Action Recognition. To tackle the domain-shift which exists under the UDA setting, we first exploited a recent Domain Generalization (DG) technique, called Relative Norm Alignment (RNA). It consists in designing a model able to generalize well to any unseen domain, regardless of the possibility to access target data at training time. Then, in a second phase, we extended the approach to work on unlabelled target data, allowing the model to adapt to the target distribution in an unsupervised fashion. For this purpose, we included in our framework existing UDA algorithms, such as Temporal Attentive Adversarial Adaptation Network (TA3N), jointly with new multi-stream consistency losses, namely Temporal Hard Norm Alignment (T-HNA) and Min-Entropy Consistency (MEC). Our submission (entry 'plnet') is visible on the leaderboard and it achieved the 1st position for 'verb', and the 3rd position for both 'noun' and 'action'.Comment: 3rd place in the 2021 EPIC-KITCHENS-100 Unsupervised Domain Adaptation Challenge for Action Recognitio

Domain generalization through audio-visual relative norm alignment in first person action recognition

First person action recognition is becoming an increasingly researched area thanks to the rising popularity of wearable cameras. This is bringing to light cross-domain issues that are yet to be addressed in this context. Indeed, the information extracted from learned representations suffers from an intrinsic "environmental bias". This strongly affects the ability to generalize to unseen scenarios, limiting the application of current methods to real settings where labeled data are not available during training. In this work, we introduce the first domain generalization approach for egocentric activity recognition, by proposing a new audiovisual loss, called Relative Norm Alignment loss. It rebalances the contributions from the two modalities during training, over different domains, by aligning their feature norm representations. Our approach leads to strong results in domain generalization on both EPIC-Kitchens-55 and EPIC-Kitchens-100, as demonstrated by extensive experiments, and can be extended to work also on domain adaptation settings with competitive results

México en Italia. Difusión, recepción, reelaboración del arte mexicano posrevolucionario, 1950-1980

Tesis Univ. Granada

O muralismo como campo de intercâmbio entre Itália e México, 1950-1980

In 1950, Mexico arrived in Italy. During the XXV Venice Biennale, works of post-revolutionary Mexican art were exhibited for the first time in Europe, and since then they have circulated on the European continent through exhibitions and publications. In Italy in particular, the experiences of Mexican muralism were considered an indispensable model for many artists and intellectuals. Moreover, they are an inspiration for the emergence of a public art movement that expressed itself through the production of murals with a clear political content during the period between 1950 and 1980. This essay shows how muralism constitutes a field of fruitful exchange between the two contexts addressed, breaking the stereotype that has always seen the artistic relationship between Mexico and Italy in a unidirectional way with a Eurocentric gaze.En el año 1950 México desembarca en Italia. Durante la XXV Bienal de Venecia se exponen por primera vez en Europa obras del arte mexicano posrevolucionario que, desde entonces, circularán en el continente europeo a través de exposiciones y publicaciones. Concretamente en Italia, las experiencias del muralismo mexicano están consideradas un modelo indispensable para muchos artistas e intelectuales. Además, constituyen una inspiración para el nacimiento de un movimiento de arte público que se expresa a través de la producción de murales de claro contenido político durante el período comprendido entre 1950 y 1980. Este ensayo muestra cómo el muralismo constituye un espacio de intercambio fructífero entre los dos contextos abordados, rompiendo el estereotipo que siempre ha visto con una mirada eurocéntrica la relación artística entre México e Italia de forma unidireccional.Em 1950, o México desembarca na Itália. Durante a XXV Bienal de Veneza, obras de arte mexicana pós-revolucionária foram exibidas pela primeira vez na Europa e, desde então, circularam no continente europeu através de exposições e publicações. Concretamente na Itália, as experiências do muralismo mexicano são consideradas um modelo indispensável para muitos artistas e intelectuais. Além disso, são uma inspiração para o nascimento de um movimento de arte pública que se expressou através da produção de murais com um claro conteúdo político durante o período entre 1950 e 1980. Este ensaio mostra como o muralismo constitui um terreno de intercâmbio fecundo entre os dois contextos abordados, quebrando o estereótipo que sempre viu a relação artística entre o México e a Itália de forma unidirecional e com um olhar eurocêntrico

Optimization of Cu-based catalyst for the electrocatalytic reduction of CO2 to fuels

In the last century, with the intensification of human industrial activities, carbon dioxide levels in the environment increased, making global warming and greenhouse effect pressing issues. In this sense, the electroreduction of CO2 is an interesting strategy, also if coupled with renewable energy sources to store the intermittent electric energy in form of chemical bonds [1]. Catalysts composed of a mixture of commercial copper nanoparticles (NPs) were studied. NPs with particles sizes of 25nm, 40-60nm and ZnO: 20-25 nm, named CZ 25_B and CZ_40-60_B. The molar ratio between copper and ZnO is equal to 65/35. Another commercial catalyst that was analysed because it is active for the CO2 hydrogenation is composed of CuO/ZnO/Al2O3 and traces of MgO (named CZA CC_B). These catalytic mixtures were prepared in a planetarian ball mill. Another sample was prepared by pre-oxidation of the Cu NPs and then by manual mixing with the ZnO (called CZ calc 2h). Carbon Nanotubes (CNT) was used as carbon substrate to increase the conductivity and allow a better catalytic ink dispersion. All the samples were characterized by BET analysis, FESEM microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and electrochemical analysis. The electrocatalytic activity was tested by using a rotating disk electrode (RDE) at ambient conditions. The best conditions were appreciated at a potential equal to -2 V vs Ag/AgCl, with the lowest FE for H2 and the highest current density (mA/cm2) in absolute value. In Figure 1, the FE % of gaseous and liquid products are reported for the different prepared catalysts. From all test, the best catalytic activity with the lowest FEH2 was obtained with the Cu/ZnO peroxidised material (CZ calc 2h) at -2 V vs Ag/AgCl. In conclusion, it can be said that Cu-based catalysts were confirmed to be active towards CO2RR via the electrochemical method, with the advantage of performing the reactions at ambient conditions

Naked-Eye Food Freshness Detection: Innovative Polymeric Optode for High-Protein Food Spoilage Monitoring

An innovative smart label for naked-eye protein food freshness evaluation, based on polymeric sensing films, is presented. The proposed device consists of six miniaturized sensors, obtained by cova..

Light-curing process for clear aligners’ attachment reproduction: comparison between two nanocomposites cured by the auxiliary of a new tool

BACKGROUND: Attachments’ configuration play an important role during Clear Aligner Treatment (CAT) for aligner retention and control of movements planned. The aims were to compare the macroscopic morphology of attachments reproduced with flowable (FNC) and conventional (CNC) composites and the effects on them of two light-guide tips with different dimensions. METHODS: 4 resin casts derived from the initial scan of the same patient were obtained. 10 vestibular attachments were replaced on both upper and lower arches of each model with CNC (Models A, B) and FNC (Models C, D). Each composite was cured by means of the same LED lamp with both regular light-guide (Models A, B) and push and light tool® (Models C, D). The 80 attachments were qualitative analyzed by means of a digital stereo microscope. Surface roughness and waviness measurements were assessed by contact probe surface profiler (TalySurf CLI 2000; Taylor Hobson, Leicester, United Kingdom). Statistical analysis was performed with independent samples t-tests. Significance was established at the P < 0.05 level. RESULTS: Model A showed lower values of surface roughness (Ra − 1.41 µm, Rt − 3.46 µm) and waviness (Wa − 2.36 µm, Wt − 10.95 µm) when compared with Model C. Significant reduction of waviness (Wa − 3.85 µm, Wt − 4.90 µm) was observed on Model B when compared with Model D. Significant increase of roughness and waviness parameters (Ra 3.88 µm, Rt 21.07, Wa 2.89 µm, Wt 14.74 µm) was found when CNC sample (Model A) was cured with regular light-guide tip. Higher values (Ra 2.33 µm, Rt 24.07 µm, Wa 1.67 µm, Wt 20.79 µm) were observed after regular light-guide tips curing on FNC sample (Model C). CONCLUSIONS: CNC resins determine more regular surfaces of attachments profiles. The additional use of a smaller light- guide of the LED push and light tool® allows to improve the macroscopic morphology of the attachments and to maximize light irradiance delivering by enhancing the polymerization process and the integrity of the features during the treatment

Treatment and outcome of metastatic parathyroid carcinoma: A systematic review and pooled analysis of published cases

Parathyroid carcinoma (PC) is an extremely rare malignant tumor with an incidence of about 6 new cases per 10 million inhabitants per year. While several papers have been published on treatments and outcomes of PC patients with loco-regional disease, little is known about the prognosis, treatment strategies, and prognostic factors of patients with distant metastasis