Playing with Data: an Experience in Creative Infovis

Information Visualization (Infovis) methods provide an effective way to make sense of the vast amount of data flowing around our everyday experience. Using creative Infovis designs is possible to convey the mean- ing and enhance the understanding of complex topics. The purpose of this paper is to present the design method adopted in a collaboration between Polytechnic of Turin and Telecom Italia, whose goal is to devise novel and useful Infovis concepts to deal with data. Powered by the sharing of differ- ent skills and experiences, this method led to the first results presented in the paper

Devices for Screening and Monitoring of Tumors Based on Chemoresistive Sensors

Abstract In this work two devices are presented, named SCENT A1 (A1) and SCENT B1 (B1), composed of chemoresistive sensors. Such devices are capable of discriminating the different compositions of gas mixtures emitted by stools, for colorectal cancer screening (A1), and by blood, for tumors monitoring (B1), according to defined sampling protocols. Results have been acquired by a LabView® software and statistically treated (e.g. quadratic discriminant analysis, QDA) and show to be encouraging with an error of 5% for SCENT A1. Preliminary results of SCENT B1 proved to be promising. Further studies will be carried out for clinically validating the two devices

Strengthening of Wood-like Materials via Densification and Nanoparticle Intercalation

Recently, several chemical and physical treatments were developed to improve different properties of wood. Such treatments are applicable to many types of cellulose-based materials. Densification leads the group in terms of mechanical results and comprises a chemical treatment followed by a thermo-compression stage. First, chemicals selectively etch the matrix of lignin and hemicellulose. Then, thermo-compression increases the packing density of cellulose microfibrils boosting mechanical performance. In this paper, in comparison with the state-of-the-art for wood treatments we introduce an additional nano-reinforcemeent on densified giant reed to further improve the mechanical performance. The modified nanocomposite materials are stiffer, stronger, tougher and show higher fire resistance. After the addition of nanoparticles, no relevant structural modification is induced as they are located in the gaps between cellulose microfibrils. Their peculiar positioning could increase the interfacial adhesion energy and improve the stress transfer between cellulose microfibrils. The presented process stands as a viable solution to introduce nanoparticles as new functionalities into cellulose-based natural materials

Functionalization of Indium Oxide for Empowered Detection of CO2 over an Extra-Wide Range of Concentrations

Carbon capture, storage, and utilization have becomefamiliar termswhen discussing climate change mitigation actions. Such endeavorsdemand the availability of smart and inexpensive devices for CO2 monitoring. To date, CO2 detection relies on opticalproperties and there is a lack of devices based on solid-state gassensors, which can be miniaturized and easily made compatible withInternet of Things platforms. With this purpose, we present an innovativesemiconductor as a functional material for CO2 detection.A nanostructured In2O3 film, functionalizedby Na, proves to enhance the surface reactivity of pristine oxideand promote the chemisorption of even rather an inert molecule asCO(2). An advanced operando equipment basedon surface-sensitive diffuse infrared Fourier transform is used toinvestigate its improved surface reactivity. The role of sodium isto increase the concentration of active sites such as oxygen vacanciesand, in turn, to strengthen CO2 adsorption and reactionat the surface. It results in a change in film conductivity, i.e.,in transduction of a concentration of CO2. The films exhibitexcellent sensitivity and selectivity to CO2 over an extra-widerange of concentrations (250-5000 ppm), which covers most indoorand outdoor applications due to the marginal influence by environmentalhumidity

Chemoresistive Gas Sensor based on SiC Thick Film: Possible Distinctive Sensing Properties Between H2S and SO2☆

Commercially available nanosized powder of silicon carbide (named SiC), was thermally, morphologically and structurally characterized. After that, it was screen-printed onto alumina substrates in order to obtain thick films to be tested as functional material for conductometric gas sensors. Samples were exposed to SO2 and H2S, gases with high importance in many application fields, with the aim of verifying its capability of distinguishing between them. The characterization highlighted that this semiconductor type is selective for sulphur dioxide (SO2), in concentrations within the ppm range. This interesting result was found at high temperatures (600-800°C), useful for harsh environmental, and the measurements proved to be completely free from humidity interference. Applications of such a sensor could span many fields, since SO2 plays an important role in air pollution, industrial processes and wine making monitoring

Introduction : translingual work.

This issue both reflects and builds on the efforts prompted by the 2011 College English essay “Language Difference in Writing: Toward a Translingual Approach,” by Bruce Horner, Min-Zhan Lu, Jacqueline Jones Royster, and John Trimbur. Contributions to this symposium contextualize the emergence of a translingual approach, explore the tension and interconnections between a translingual approach and a variety of fields, and explore the viability of a translingual approach in light of existing academic structures

Reconstruire la ville sur la ville - Recyclage des espaces dégradés. Etat d'avancement

audience: researcher, professional, studentRapport intermédiaire de la subvention 2004-200

Roadmap on printable electronic materials for next-generation sensors

The dissemination of sensors is key to realizing a sustainable, ‘intelligent’ world, where everyday objects and environments are equipped with sensing capabilities to advance the sustainability and quality of our lives—e.g., via smart homes, smart cities, smart healthcare, smart logistics, Industry 4.0, and precision agriculture. The realization of the full potential of these applications critically depends on the availability of easy-to-make, low-cost sensor technologies. Sensors based on printable electronic materials offer the ideal platform: they can be fabricated through simple methods (e.g., printing and coating) and are compatible with high-throughput roll-to-roll processing. Moreover, printable electronic materials often allow the fabrication of sensors on flexible/stretchable/biodegradable substrates, thereby enabling the deployment of sensors in unconventional settings. Fulfilling the promise of printable electronic materials for sensing will require materials and device innovations to enhance their ability to transduce external stimuli—light, ionizing radiation, pressure, strain, force, temperature, gas, vapours, humidity, and other chemical and biological analytes. This Roadmap brings together the viewpoints of experts in various printable sensing materials—and devices thereof—to provide insights into the status and outlook of the field. Alongside recent materials and device innovations, the roadmap discusses the key outstanding challenges pertaining to each printable sensing technology. Finally, the Roadmap points to promising directions to overcome these challenges and thus enable ubiquitous sensing for a sustainable, ‘intelligent’ world

ELECTRIC VEHICLE AND SUSTAINABLE MOBILITY: AN INNOVATIVE INTERFACE

The paper presents a concept of an innovative interaction structure for a digital electric vehicle (EV) dashboard. The structure connects interactions between vehicle, driver and traffic infrastructure, in order to help users driving in a conscious way, informing them about their performances and providing tools able to modify driving behaviour. Through the Systemic Design approach, it is possible to move from a quantitative configuration (set on consumption) to a new one set on resource optimization. The achievement is a new layout for the information visualization system designed for an electric vehicle able to communicate to the driver the environmental impact of its drive style

GRAPHENE-BASED COMPOSITES FOR GAS SENSING AND CATION TRAPPING APPLICATIONS

During the last decade, due to its excellent electrical, mechanical and thermal properties chemically modified graphene (G) has been extensively studied for many applications, such as polymer composites, energy-related materials, biomedical applications and sensors. In the latter field, the high electrical conductivity of G allowed to explore its gas sensing performance at room temperature, which opens up to the development of ultra-low power consumption gas sensors. We functionalized pure G both via physical and via chemical route. First, we decorated few-layers G powder with niobium oxide (Nb2O5) nanoclusters by magneton sputtering. Two different samples were prepared by changing electrical power of deposition. In the second case, starting from graphene oxide (GO), we functionalized it with three different aza-crown ethers via nucleophilic attack, where the amine groups of an aza-crown ether molecule can easily react with epoxy sites of GO basal plane. All produced 2D hybrid nanocomposites were deeply morphologically, structurally and chemically characterized. Then, they were deposited onto alumina substrates with gold interdigitated electrodes and their sensing properties were investigated vs. different gases, showing good sensing performance vs. ppm concentrations of NO2 and humidity at room temperature. Moreover, the porous scaffold built by the crown ethers GO functionalization enhanced its possible use for cations trapping application, e.g. water filter