Showing papers by "Emmanuel Dubois published in 2015"

The Roly-Poly Mouse: Designing a Rolling Input Device Unifying 2D and 3D Interaction

Abstract: We present the design and evaluation of the Roly-Poly Mouse (RPM), a rolling input device that combines the advantages of the mouse (position displacement) and of 3D devices (roll and rotation) to unify 2D and 3D interaction. Our first study explores RPM gesture amplitude and stability for different upper shapes (Hemispherical, Convex) and hand postures. 8 roll directions can be performed precisely and their amplitude is larger on Hemispherical RPM. As minor rolls affect translation, we propose a roll correction algorithm to support stable 2D pointing with RPM. We propose the use of compound gestures for 3D pointing and docking, and evaluate them against a commercial 3D device, the SpaceMouse. Our studies reveal that RPM performs 31% faster than the SpaceMouse for 3D pointing and equivalently for 3D rotation. Finally, we present a proof-of-concept integrated RPM prototype along with discussion on the various technical challenges to overcome to build a final integrated version of RPM.

Design and Evaluation of an "Around the SmartPhone" Technique for 3D Manipulations on Distant Display

Abstract: In this paper, we present the "Around the SmartPhone" interaction technique for manipulating 3D elements displayed on a distant screen. The design of the technique is based on the selection of the most appropriate value for characteristics useful to discriminate existing tactile and tangible techniques for 3D manipulations. We perform two user studies to compare this around-device technique for translating and rotating 3D objects, with two existing tangible and tactile solutions, in terms of performance and user's preference. The literature establishes that the tactile technique evaluated is the best tactile technique among the existing tactile techniques for 3D manipulation. Despite this result, our user study reveals that the two others perform significantly better. In addition, when feedback visibility is preserved, the around-device technique offers similar performance results than the tangible one. Finally, the around-device technique is significantly preferred over the two others in every condition.

Toward quantitative modeling of silicon phononic thermocrystals

Abstract: The wealth of technological patterning technologies of deca-nanometer resolution brings opportunities to artificially modulate thermal transport properties. A promising example is given by the recent concepts of "thermocrystals" or "nanophononic crystals" that introduce regular nano-scale inclusions using a pitch scale in between the thermal phonons mean free path and the electron mean free path. In such structures, the lattice thermal conductivity is reduced down to two orders of magnitude with respect to its bulk value. Beyond the promise held by these materials to overcome the well-known “electron crystal-phonon glass” dilemma faced in thermoelectrics, the quantitative prediction of their thermal conductivity poses a challenge. This work paves the way toward understanding and designing silicon nanophononic membranes by means of molecular dynamics simulation. Several systems are studied in order to distinguish the shape contribution from bulk, ultra-thin membranes (8 to 15 nm), 2D phononic crystals, and finally 2D phononic membranes. After having discussed the equilibrium properties of these structures from 300 K to 400 K, the Green-Kubo methodology is used to quantify the thermal conductivity. The results account for several experimental trends and models. It is confirmed that the thin-film geometry as well as the phononic structure act towards a reduction of the thermal conductivity. The further decrease in the phononic engineered membrane clearly demonstrates that both phenomena are cumulative. Finally, limitations of the model and further perspectives are discussed.

Application-oriented performance of RF CMOS technologies on flexible substrates

Abstract: Ultimate-thinning-and-transfer-bonding (UTTB) of RF SOI-CMOS chips is demonstrated on plastic, metal and glass substrates. Beyond process simplicity, UTTB can be tailored to meet specific application requirements like ultra mechanical flexibility, heat dissipation, transparency while retaining same fT/fmax performance and improving harmonic rejection when compared to conventional rigid SOI.

Ultra-foldable/stretchable wideband RF interconnects using laser ablation of metal film on a flexible substrate

Abstract: In this paper we demonstrate the feasibility of mechanically flexible and stretchable coplanar waveguide (CPW) transmission lines at millimeter-wave frequencies. Our approach is based on meander horseshoe-shaped CPW line on 125 µm-thick Polyethylene Naphthalate (PEN) dielectric substrate. The desired meander shape pattern of the conductor is structured using a nanosecond pulsed laser source operating at 351 nm wavelength by the precise patterning of a 1 µm-thick conductive film deposited on a plastic foil. The cutout is realized by following the outer meander shape path of the structure providing an ultra-flexible/stretchable interconnect line. An experimental attenuation below 0.12 dB·mm−1 for a 13 mm length of signal conductor has been obtained at 40 GHz. When submitted to bending on a semi-cylinder of known radius, the measured transmission coefficient show small variations less than 0.05 dB even for bending radius in the centimeter range.

Characterization of flexible CMOS technology tranferred onto a metallic foil

Abstract: In this work we demonstrate a method to transfer high-performance industrial CMOS circuits thinned down to 5.7 μm and bond onto a 25-μm-thick stainless steel foil with a 800-nm-thick indium layer. The bonding is performed at the temperature of 100°C with an applied pressure of 1.2 bar. The die stack transferred onto the metallic substrate comprises the 200-nm-thick active layer and the 5.5-μm-thick interconnection multilayer stack resulting in a light, compact, and bendable thin film. We unveil that DC and RF performances are invariant after the transfer onto this metallic substrate. Unity-current-gain cutoff and maximum frequencies as high as 163/188 GHz for n-MOSFETs and 100/159 GHz for p-MOSFETs have been measured.

Design and evaluation of an interaction technique for volume selection in a 3D point cloud

Abstract: A fundamental task needed when using a 3D virtual environment is the ability to select. This is necessary to perform local treatments, such as translating an object. While classical techniques, such as ray-casting, works well for large objects it becomes more difficult when the need for precision is greater and almost impossible for a point selection. To select a set of points in a point cloud we created a novel selection technique. It allows to select complex shapes while remaining simple to use. Using our technique relies on three principles: 1) selecting points consists in progressively elaborating a cylinder-like shape (the worm) through the sequential definition of several sections; 2) a section is defined between two contours linked together with straight lines; 3) each contour is a freely drawn closed line. A user study reveals that our technique is significantly faster than a classical selection mechanism based on predefined volumes such as spheres or cuboids while maintaining a comparable level of precision and recall.

Non-visual interactions to support information sequence transmission

Abstract: This paper presents the design and evaluation of non-visual multimodal interaction techniques for collecting and storing a sequence of information. This task is representative of multiple contexts including the transmission of an itinerary represented as a sequence of pair direction-distance. Among twenty techniques we had designed, four have been evaluated with users. The results of this study establish the interest of two techniques in terms of perception, memorization and recall of information and a third one appears to be more resistant to interference task.

Multi-level interaction for the exploration of rich information space

Abstract: In this article, we discuss the visualization and interaction paradigms based on the Overview + Detail and Focus + Context mechanisms to support the exploration of rich information spaces, i.e. heterogeneous and multidimensional. We identify a set of levels of detail of the information, ranging from the information universe, until finest level corresponding to the data themselves. Each level is oriented toward a specific goal, deployed on an appropriate device class and operated through specific interaction techniques.

Disco(s) : Dispositifs à Multiples Degrés de Liberté pour Interagir avec des Données Multidimensionnelles

Abstract: Cette demo presente deux versions d'un nouveau dispositif d'interaction a multiples degres de liberte. Le premier, appele Disco, est base sur le principe du culbuto. Le deuxieme est base sur la composition entre une souris classique et une version reduite de Disco. Nous illustrons l'usage de ces deux dispositifs pour manipuler des objets graphiques 2D (rotation, translation et changement de taille) et pour deplacer et orienter un objet dans un environnement 3D. Mots Cles Dispositif en entree ; dispositif a multiples degres de liberte ; multidimensionnel.