Archivio della ricerca della Scuola Superiore Sant'Anna
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The employment of human rights to demand accountability for activities of international organizations harming individuals
No full textFriction and Wear Behavior of Laser‐Induced Graphene Structures on Polyimide Films
No full textLaser-induced graphene (LIG) is formed by the conversion of certain carbon precursors when irradiated with a laser beam. Predesigned LIG patterns are scribed onto the precursor material in a low-cost and maskless process, which enables the fabrication of flexible and electrically conductive materials for various applications. This study explores the friction and wear behavior of LIG from a polyimide precursor. Line patterns with different widths (200, 100, 50, and 30 μm) are introduced to modify the friction properties. An ultraviolet laser source with a nominal beam size of 2 μm is used, as it allows to scribe patterns with smaller dimensions and at higher resolution compared to the more commonly applied infrared laser sources. A distinct correlation is established between the pattern and its friction behavior, where lowering the line size results in a decrease in the coefficient of friction (COF). The wear behavior is evaluated, revealing gradual wear of the protruding LIG roughness peaks and a change in the graphenic material, which reduces the COF during the running-in stage of the tribological testing. Due to its versatility in terms of precursor material, patterning options, and morphology modification, LIG represents a meaningful candidate for customized tribological applications
Volatile organic compounds as potential markers of Botrytis cinerea infection in intact harvested grape berries
No full textI primi proseliti della neonata regola Caria: il sindacato accentrato di costituzionalità nel contrasto normativo italo-europeo di matrice penalistica, in Giurisprudenza costituzionale, n. 1/2025
No full textPlant diversification shapes multi-kingdom soil microbial communities in Mediterranean vineyards.
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The Effects of Intensive Residential Treatment for Feeding and Eating Disorders (FEDs) in Adolescence: The Case of an Italian Facility
No full textBackground: Feeding and eating disorders (FEDs) represent a global health problem with an increasing incidence and a progressively earlier onset. Residential treatment is notable for its intensity and ability to provide multidisciplinary support to both patients and families. The objective of this study was to clinically characterize patients and to evaluate the impact of treatment at the “Orti di Ada” facility on the evolution of FEDs in adolescent patients. Methods: A cohort of 47 minors, treated in 2019–2024, was studied through longitudinal observation. Data were collected from medical records, and standardized questionnaires were administered at baseline (T0) and at the conclusion of treatment (T1). Comparisons between scores on the scales were made using paired t-tests for within-group changes from T0 to T1 or using Mann–Whitney tests for between-group comparisons. Spearman’s correlation coefficient was used to assess the relationship between pairs of variables. Results: The sample consisted of female patients (mean age: 15 years). The mean body mass index (BMI) at T1 was 16.6 kg/m2. The majority of patients (74.5%) had been undergoing treatment for less than one year. Most patients had been diagnosed with restrictive-type anorexia nervosa (74.5%), while 53.2% had multiple concomitant psychiatric comorbidities. The mean BMI increased to 18.7 kg/m2, suggesting biological recovery, along with the restoration of the menstrual cycle. Conclusions: Psychological measures showed significant improvements in subjects with exclusive depressive comorbidity. The correlations of age and disease duration with changes in questionnaire scores suggest that earlier treatment leads to more favorable outcomes. The results provided insights into the appropriateness of intensive treatment that, when targeting specific psychological factors, improves biological and psychological recovery
Soft Pneumatic Gripper With Interchangeable Fingertips by Using Reversible Polymers: The GraspBerry, a Raspberry Picking Case Study
No full textFingerprints primarily enhance grasping by modulating friction, as the surface pattern affects the friction needed for effective grasping and manipulation. A versatile gripper was developed with a more realistic distal phalange inspired by the human index finger for improved berry gripping performance. The soft pneumatic gripper was fabricated out of a Diels-Alder–based self-healing polymer, leveraging its thermally reversible nature for introducing interchangeable fingertips. Various fingertips were developed with different patterns for optimized grasping of fruits of different shape, size, and stiffness, depending on the type of fruit, level of ripeness, and variations in weather and climate conditions of each harvest season. The fingertips can be mounted and removed easily from the distal phalange of the pneumatic finger by welding and manual disassembly. The gripper was optimized for picking raspberries, exploiting the innovative interchangeable fingertips. The same gripper could successfully harvest berries of different levels of ripeness thanks to three types of interchangeable fingertips with different patterns. The performance of the different fingertips was evaluated in the lab on a physical twin of a raspberry and a 67% success rate was obtained in the field by switching them on the spot to optimize the grasp to the different ripeness level of the berries. The GraspBerry paves the way for the design of versatile grippers with adaptable grasping performance by switching the fingertips for accurate and reliable grasp on different types of crops throughout the various harvesting seasons all year round
