Development of glass-stalks-unsaturated polyester hybrid composites

The aim of this study is to investigate the possibility to use agro-residues of the vinification process as a cheaper and eco-friendly fillers to prepare unsaturated polyester composites for interior design building sector. Experimental unsaturated polyester–based resin composite samples, reinforced with grape stalks, were prepared by a simple casting technique. The glass microspheres were added in the mixing to increase the mechanical and physical properties of the final materials. A silane coupling agent was used to increase the interface adhesion between resin and grape stalks. The samples were subjected to several tests. Unfilled samples were analyzed by Differential Scanning calorimetry (DSC). Prepared silanized and non-silanized composites were completely characterized in order to study the effect of stalk fibers concentration on the mechanical, chemical and physical properties. The results showed that mechanical and physical properties for silanized composites were superior to non-silanized composites. The presence of stalks, up to 50% wt. increased Young's Modulus preserving a satisfactory tensile strength and hardness in comparison with the neat resin properties. Then, the final results showed that grape stalks from winemaking can be satisfactory used as natural filler resource to produce composites for interior furniture

The desire of parenthood. Correlation between co-parental interactions and the romantic relationship quality among Italian same-sex couples.

In several longitudinal studies, co-parental interactions have been formerly observed during the pregnancy, demonstrating how these interactive dynamics can predict the quality of family interactions with the presence of the baby. Cooperation between the parents during the first year after childbirth is the most predictive factor of the best future adjustment of the baby during the school age and social and affective development.In the last years, research focused on such interactive dynamics recognisable during the process of transition to parenthood; nevertheless, these studies pointed out features regarding a particular type of family defined as \u201ctraditional\u201d, formed by a mother, a father and their biological children. Thanks to the development of the medicine concerning the medical assisted procreation, nowadays parenthood is accessible by gay and lesbian couples as well; gay and lesbian parenting is becoming a reality increasingly relevant also in Italy. Couple satisfaction, co-parental interactions and intuitive parental competences have been evaluated among a sample formed by 45 stable heterosexual, gay and lesbian couples without a child that want to become parents in the future. We used the systemic approach by the prenatal Lausanne Trilogue Play, a semi-naturalistic role-play: this tool involves in a cooperative task the two \u201cparents\u201d and a doll, which represents the child-to-be. Couple satisfaction has been evaluated with the Dyadic Adjustment Scale (DAS Spanier, 1976). Preliminary data suggest that there are no differences between the three groups regarding co-parental intuitive competences and that a higher cohesion between the couple involves a better cooperation between the partners

La genitorialità reclusa: essere padri in carcere

Essere padri detenuti rientra nella categoria di genitorialità a rischio, in quanto la condizione di detenzione fa venire meno alcuni presupposti fondamentali dell’esercizio della funzione genitoriale. Il genitore dovrebbe riuscire trasmettere al bambino fiducia nelle sue capacità di crescita perché il bambino si nutre di questo e non di tutte le cose che gli possono essere date materialmente (Bouregba, 2004)1. Per i detenuti, la famiglia, molto spesso, costituisce la più importante fonte di speranza, benessere e legame con l’esterno (Magaletta, Herbst, 2001)2. Ma l'ingresso in carcere interrompe ed altera la natura bidirezionale e reciproca dello scambio comunicativo e interattivo genitore-figlio. Un padre detenuto non può esercitare nella contiguità fisica, spaziale e temporale il ruolo di genitore. Va inoltre considerato che stereotipi e pregiudizi possono contribuire a creare una rappresentazione culturalmente condivisa del detenuto come soggetto incapace di essere un buon genitore, e ciò potrebbe determinare, nei soggetti in questione, un vissuto di fallimento e di inadeguatezza rispetto alla percezione di sé come padre e al proprio ruolo (Cassibba, Luchinovich, Montatore, Godelli, 2008)3. Inoltre l’assenza di modelli di riferimento adeguati, le condizioni iniziali di svantaggio, la povertà degli strumenti cognitivi, comunicativi e relazionali disponibili, uniti all’esperienza di un contesto restrittivo quale il carcere, rendono difficile la costruzione e il mantenimento di un legame fra padre-figlio adeguato alle esigenze di sviluppo del minore e stabile nel tempo (Cassibba et al, op cit, 2008). Sulla base di tale impostazione teorico-concettuale, l'obiettivo del presente contributo è quello di presentare i dati preliminari di una ricerca che ha visto la collaborazione tra l'Università di Bari e di Modena e Reggio Emilia, coinvolgendo nel contempo le amministrazioni penitenziarie delle due rispettive regioni, con lo scopo di indagare l'auto-percezione del ruolo paterno in padri in stato detentivo, esplorando nel contempo la relazione tra tale forma di auto-percezione e lo stile di attaccamento dei partecipanti alla ricerca. Dal punto di vista metodologico, per la misurazione delle variabili in oggetto sono stati utilizzati l'Attachment Style Questionnaire- ASQ (Feeney, Noller e Hanrahan, 1994) e il questionario sull'Auto-percezione del Ruolo Paterno (Harter, 1982)

Hydrophobic and Oleophobic Coatings Based on Perfluoropolyether/Silica Hybrids by the Sol-Gel Method

Glass substrates were spin-coated with a perfluoropolyether oligomer based organic-inorganic hybrid material, and prepared by the sol-gel process. Contact angle analysis and atomic force microscopic analysis were carried out to characterize the surface of the prepared coatings. All systems exhibited strong hydrophobic and oleopophobic characteristics. The wettability behavior was found to be almost independent of both molecular weight and functionality of the fluorinated oligomer. The low values obtained for the contact angle and surface tension indicate that surface segregation of perfluoropolyether segments is likely to take place within the network. On the basis of these results and the high quality of the obtained coatings, these materials could be used as functional coatings to impart water and oleo-repellent characteristics to glasses and other similar substrates

Light-emitting textiles: Device architectures, working principles, and applications

E-textiles represent an emerging technology aiming toward the development of fabric with augmented functionalities, enabling the integration of displays, sensors, and other electronic components into textiles. Healthcare, protective clothing, fashion, and sports are a few examples application areas of e-textiles. Light-emitting textiles can have different applications: Sensing, fashion, visual communication, light therapy, etc. Light emission can be integrated with textiles in different ways: Fabricating light-emitting fibers and planar light-emitting textiles or employing side-emitting polymer optical fibers (POFs) coupled with light-emitting diodes (LEDs). Different kinds of technology have been investigated: Alternating current electroluminescent devices (ACELs), inorganic and organic LEDs, and light-emitting electrochemical cells (LECs). The different device working principles and architectures are discussed in this review, highlighting the most relevant aspects and the possible approaches for their integration with textiles. Regarding POFs, the methodology to obtain side emissions and the critical aspects for their integration into textiles are discussed in this review. The main applications of light-emitting fabrics are illustrated, demonstrating that LEDs, alone or coupled with POFs, represent the most robust technology. On the other hand, OLEDs (Organic LEDs) are very promising for the future of light-emitting fabrics, but some issues still need to be addressed

Microphotoluminescence spectroscopy of vertically stacked In x Ga 1 − x A s / G a A s quantum wires

Disorder and spectral broadening of vertically stacked InGaAs/GaAs V-grooved quantum wires have been investigated by means of microprobe luminescence. We show that the main spectral broadening mechanism originates from monolayer fluctuations at the bottom of the wire. A direct evidence of monolayer height islands of area 40\ifmmode\times\else\texttimes\fi{}40\mathrm{nm} formed at the bottom of the grooves is provided by atomic force microscopy. Lateral and vertical wire-to-wire fluctuations are found to be negligible on the micron scale