Online domain adaptation for person Re-identification with a human in the loop

Supervised deep learning methods have recently achieved remarkable performance in person re-identification. Unsupervised domain adaptation (UDA) approaches have also been proposed for application scenarios where only unlabelled data are available from target camera views. We consider a more challenging scenario when even collecting a suitable amount of representative, unlabelled target data for offline training or fine-tuning is infeasible. In this context we revisit the human-in-the-loop (HITL) approach, which exploits online the operator's feedback on a small amount of target data. We argue that HITL is a kind of online domain adaptation specifically suited to person re-identification. We then reconsider relevance feedback methods for content-based image retrieval that are computationally much cheaper than state-of-the-art HITL methods for person reidentification, and devise a specific feedback protocol for them. Experimental results show that HITL can achieve comparable or better performance than UDA, and is therefore a valid alternative when the lack of unlabelled target data makes UDA infeasible

Hand-arm resonance frequency and related neuromuscular activation

The ability of the hand-arm system (HAS) to transmit the vibrations depends on ages of the subjects, but also on gender. In order to parameterize the effects of vibrations on young sedentary subjects (i.e. students of the course on Biomedical Signal Processing at the University of Roma Sapienza) divided in females and males, we have asked them to grasp a vibrating handle and to exert a prefixed muscular effort, measured as relative to the Maximal Voluntary Contration (MVC) of each of them

Effect of two training programs on bone mineral density parameters in chronic obstructive pulmonary disease

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Effect of two training programs on bone mineral density parameters in chronic obstructive pulmonary disease

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Benefits of Sports Participation for Executive Function in Disabled Athletes

We investigated the effect of sports activity on physically-disabled individuals using behavioral and electrophysiological techniques. Visual go/no-go discriminative and simple response tasks were used. Participants included 17 disabled athletes, 9 from open-skill (wheelchair basketball) and eight from closed-skill (swimming) sports, and 18 healthy non-athletes. Reaction times of the disabled athletes were slower than those of healthy non-athletes on both tasks (7% and 13% difference, respectively). Intra-individual variations in reaction times, switch cost, and number of false alarms, were higher in the swimmers, but comparable to healthy non-athletes, in the basketball group. Event-related potentials (ERPs) early components P1, N1, and P2 had longer latencies in the disabled athletes. The late P3 component had longer latency and smaller amplitude in the disabled athletes only in the discriminative response task. The N2 component, which reflected inhibition/execution processing in the discriminative response task, was delayed and reduced in the swimmer group, but was comparable to healthy subjects in the basketball group. Our results show that (1) the ERP components related to perceptual processing, and late components related to executive processing, were impaired in disabled subjects; and (2) open-skill sports such as basketball may partially compensate for executive control impairment by fostering the stability of motor responses and favoring response flexibility

Parabolic through demonstrator for high temperature solar energy in Sardinia using gas as heat transfer fluid

Estate Lab project is aimed towards building up a laboratory for the development of high temperature concentrated solar technologies in Sardinia, Italy. The main purpose of the R&D activities is the construction of a demonstration plant for the production and storage of energy at 550°C by means of sun-heated gaseous fluids. The plant will be built in the industrial area of Macchiareddu, nearby Cagliari and mainly consists of two 100 m. lines of parabolic trough collectors and one thermocline pebble-bed energy storage for each line. The Estate Lab project demonstrator will be developed in order to prove the good findings of the research activities and to validate the expected results. The optimisation of the system will be also investigated for a proper scale up of the plant to a commercial size for bulk electricity production. This paper presents the key technical data of the experimental facility and the significant and innovative aspects of the project

Parabolic trough demonstrator for high temperature solar energy in sardinia using gas as heat transfer fluid

ESTATE Lab (Laboratorio per l’Energia Solare Termica ad Alta Temperatura) project is aimed towards building up a laboratory for the development of high temperature concentrated solar technologies in Sardinia, Italy. The main purpose of the R&D activities is the construction of a demonstration plant for the production and storage of energy at 550°C by means of sun-heated gaseous fluids. The plant will be built in the industrial area of Macchiareddu, nearby Cagliari and mainly consists of two 100 m. lines of parabolic trough collectors and one thermocline pebble-bed energy storage for each line. The Estate Lab project demonstrator will be developed in order to prove the good findings of the research activities and to validate the expected results. The optimisation of the system will be also investigated for a proper scale up of the plant to a commercial size for bulk electricity production. This paper presents the key technical data of the experimental facility and the significant and innovative aspects of the project