3d printing technologies: Are their materials safe for conservation treatments?

3D printing technologies have been definitively introduced in conservation treatments. Despite the advantage of not requiring direct contact with the artwork, allowing the preservation of fragile objects, the printed item is located in direct contact with the object and the characterization of the filament used for the printing is not often taken into consideration. The following study was undertaken as an evaluation of filaments possibly employed for conservation treatments. The characterisation of the components was carried out through infrared spectroscopy, thermal and chromatographic analyses. Moreover, it was investigated whether such materials release volatile organic compounds (VOC) during their degradation process. Indeed, all of them released styrenic and alkyl compounds, all solvents for materials that can be found on artworks, employed by both, artist and conservator

A New Frontier in Breast Cancer Management: Oncotype DX

Diagnosing and prognosticating breast cancer has traditionally relied upon histomorphologic analysis and immunohistochemistry. With the recent advent of multigene molecular assays, traditional methods are being augmented with molecular biomarkers. Implementation of the Oncotype DX assay has led to a change in treatment of patients with early stage, estrogen positive cancer. Oncotype DX uses the expression of 21 genes at the mRNA level to determine a 10 year recurrence risk in node negative and 5 year recurrence risk in node positive cancer. 16 malignancy markers related to estrogen, HER2, cell proliferation, and invasion potential are compared with 5 reference genes and run through a proprietary algorithm to provide a recurrence score of either low, intermediate, or high risk. Using the results of this assay provides an opportunity for personalized treatment based on unique malignancy markers. Oncotype DX allows patients with low recurrence risk to be spared the adverse effects of chemotherapy, while ensuring that high risk patients are treated systemically. For the first time, the most recent treatment guidelines specify the use of Oncotype DX for the management of breast cancer

Minimal phrase composition revealed by intracranial recordings

The ability to comprehend phrases is an essential integrative property of the brain. Here we evaluate the neural processes that enable the transition from single word processing to a minimal compositional scheme. Previous research has reported conflicting timing effects of composition, and disagreement persists with respect to inferior frontal and posterior temporal contributions. To address these issues, 19 patients (10 male, 19 female) implanted with penetrating depth or surface subdural intracranial electrodes heard auditory recordings of adjective-noun, pseudoword-noun and adjective-pseudoword phrases and judged whether the phrase matched a picture. Stimulus-dependent alterations in broadband gamma activity, low frequency power and phase-locking values across the language-dominant left hemisphere were derived. This revealed a mosaic located on the lower bank of the posterior superior temporal sulcus (pSTS), in which closely neighboring cortical sites displayed exclusive sensitivity to either lexicality or phrase structure, but not both. Distinct timings were found for effects of phrase composition (210–300 ms) and pseudoword processing (approximately 300–700 ms), and these were localized to neighboring electrodes in pSTS. The pars triangularis and temporal pole encoded anticipation of composition in broadband low frequencies, and both regions exhibited greater functional connectivity with pSTS during phrase composition. Our results suggest that the pSTS is a highly specialized region comprised of sparsely interwoven heterogeneous constituents that encodes both lower and higher level linguistic features. This hub in pSTS for minimal phrase processing may form the neural basis for the human-specific computational capacity for forming hierarchically organized linguistic structures

Use of training with BCI (Brain Computer Interface) in the management of impulsivity

Impulsivity represents one of the risk factors strongly related to dependent behavior in subjects with a diagnosis of substance dependence. The risk appetite, in particular, represents a construct connected with other components such as jumping to conclusion and risk taking.There are several forms of treatment used with subjects who have problems related to impulsivity. A good part of these is aimed at subjects with ADHD (Attention Deficit Hyperactivity Disorder), in the form of training or exercises implemented on software. This work aims to evaluate the use of training for concentration, attention and meditation on reducing risk appetite. The experimental design, of a pre-post type, involves assessing the risk appetite before and after training, to be carried out in six sessions over two weeks. The comparison between the experimental group and the control groups showed significant efficacy in reducing the levels of impulsivity in subjects with addiction.This work represents a pilot study on the possible use of meditation, concentration, and training exercises and demonstrates how these can be considered as excellent forms of training for the reduction of impulsiveness and risk appetite, showing their feasibility in the contexts of intervention and cure for addictions

Who are the victims of cyberbullying? Preliminary data towards validation of "cyberbullying victim questionnaire”

In the literature there are more and more works dealing with cyberbullying and adolescents’ perception of this phenomenon. In particular, we are interested in cyberbullying and the effects of cyberbullying on adolescent life. What is more, in 2020 the impact of COVID-19 has increased the digital presence of cyberbullying behaviours. This phenomenon is extremely complex, since it is multicomponential and multifactorial, and many components act on it. Starting with an analysis of the literature, this work offers preliminary data towards the validation of a self-reporting questionnaire; it was administered to 650 adolescents, to evaluate their perceptions of the victims of cyberbullying. The questionnaire consisted of 33 items; Principal Component Analysis was applied, which identified the dimensions resuming the items’ variability. The findings confirmed the multidimensional nature of the issue covered by the questionnaire and highlighted three psychological dimensions: Internalisation, Counterbalance and Marginalisation. The results support the structure of the questionnaire, useful to quickly collect information about adolescents’ perception of cybervictimisation. The assessment of this information might help teachers, educators, and tutors to formulate targeted interventions to combat the spread of cyberbullying aimed for example at improving emotional intelligence, starting from the construction of emotional contagion

Mouth Rinsing With Carbohydrate Solutions at the Postprandial State Fail to Improve Performance During Simulated Cycling Time Trials.

Mouth-rinsing with carbohydrate solutions during cycling time trials results in performance enhancements, however the majority of studies have utilised ∼6% carbohydrate solutions. Therefore, the purpose of this study was to compare the effectiveness of mouth-rinsing with 4%, 6%, and 8% carbohydrate (CHO) solutions on 1-h simulated cycling time trial performance. On four occasions, seven trained male cyclists completed at the postprandial period, a set amount of work as fast as possible in a randomised, counterbalanced order. The subjects mouth rinsed for 5-s, upon completion of each 12.5% of the trial, with 25 mL of a non-CHO placebo, 4%, 6%, and 8% CHO solutions. No additional fluids were consumed during the time trial. Heart rate (HR), ratings of perceived exertion (RPE), thirst (TH) and subjective feelings (SF) were recorded after each rinse. Further, blood samples were drawn every 25% of the trial to measure blood glucose (BG) and blood lactate (BG) concentrations, whilst whole body carbohydrate oxidation was monitored continuously. Time to completion was not significant between conditions with the placebo, 4%, 6%, and 8% conditions completing the trials in 62.0 ± 3.0, 62.8 ± 4.0, 63.4 ± 3.4, and 63 ±4.0 minutes respectively. There were no significant differences between conditions in any of the variables mentioned above however significant time effects were observed for HR, RPE, TH, and SF. Post-hoc analysis showed that TH and SF of subjects in the CHO conditions but not in the placebo were significantly increased by completion of the time trial. In conclusion, mouth-rinsing with CHO solutions did not impact 1-h cycling performance in the postprandial period and in the absence of fluid intake. Our findings suggest that there is scope for further research to explore the activation regions of the brain and whether they are receptive to CHO dose, before specific recommendations for athletic populations are established. Consequently mouth-rinsing as a practical strategy for coaches and athletes is questionable under specific conditions and should be carefully considered before its inclusion. The emphasis should be focused on appropriate dietary and fluid strategies during training and competition

The Color of Childhood: The Role of the Child/Human Binary in the Production of Anti-Black Racism

The binary between the figure of the child and the fully human being is invoked with regularity in analyses of race, yet its centrality to the conception of race has never been fully explored. For most commentators, the figure of the child operates as a metaphoric or rhetorical trope, a non-essential strategic tool in the perpetuation of White supremacy. As I show in the following, the child/human binary does not present a contingent or merely rhetorical construction but, rather, a central feature of racialization. Where Black peoples are situated as objects of violence it is often precisely because Blackness has been identified with childhood and childhood is historically identified as the archetypal site of naturalized violence and servitude. I proceed by offering a historical account of how Black peoples came to inherit the subordination and dehumanization of European childhood and how White youth were subsequently spared through their partial categorization as adults

Genetic structure and pod morphology of Inga edulis cultivated vs. wild populations from the Peruvian Amazon

Research Highlights: This study assesses the genetic diversity and structure of the ice-cream-bean (Inga edulis Mart.) (Fabaceae), in wild and cultivated populations from the Peruvian Amazon. This research also highlights the importance of protecting the biodiversity of the forest in the Peruvian Amazon, to preserve the genetic resources of species and allow further genetic improvement. Background and Objectives: Ice-cream-bean is one of the most commonly used species in the Amazon region for its fruits and for shading protection of other species (e.g.: cocoa and coffee plantations). Comprehensive studies about the impact of domestication on this species’ genetic diversity are needed, to find the best conservation and improvement strategies. Materials and Methods: In the current study, the genetic structure and diversity were assessed by genotyping 259 trees, sampled in five wild and 22 cultivated I. edulis populations in the Peruvian Amazon, with microsatellite markers. Pod length was measured in wild and cultivated trees. Results: The average pod length in cultivated trees was significantly higher than that in wild trees. The expected genetic diversity and the average number of alleles was higher in the wild compared to the cultivated populations, thus, a loss of genetic diversity was confirmed in the cultivated populations. The cultivated trees in the Loreto region had the highest pod length and lowest allelic richness, nevertheless the wild populations’ genetic structure was not clearly differentiated (significantly different) from that of the cultivated populations. Conclusions: A loss of genetic diversity was confirmed in the cultivated populations. The species could have been simultaneously domesticated in multiple locations, usually from local origin. The original I. edulis Amazonian germplasm should be maintained. Cultivated populations’ new germplasm influx from wild populations should be undertaken to increase genetic diversity.info:eu-repo/semantics/publishedVersio