publications([{
   "lang": "en",
   "publisher": "ACM",
   "doi": "https://doi.org/10.1145/3206505.3206510",
   "title": "Simulating an Extendable Tangible Slider for Eyes-Free One-Handed Interaction on Mobile Devices",
   "url": "https://dl.acm.org/citation.cfm?doid=3206505.3206510",
   "journal": "AVI '18 Proceedings of the 2018 International Conference on Advanced Visual Interfaces",
   "authors": {
      "1": {
         "first_name": "Juan Pablo",
         "last_name": "Rosso Pirela"
      },
      "2": {
         "first_name": "Céline",
         "last_name": "Coutrix"
      },
      "3": {
         "first_name": "Matt",
         "last_name": "Jones"
      },
      "4": {
         "first_name": "Laurence",
         "last_name": "Nigay"
      }
   },
   "year": 2018,
   "uri": "http://iihm.imag.fr/publication/RCJ+18a/",
   "pages": "16:1-16:9",
   "bibtype": "inproceedings",
   "id": 816,
   "abbr": "RCJ+18a",
   "address": "Grosseto, Italy",
   "date": "2018-05-29",
   "document": "http://iihm.imag.fr/publs/2018/avi18RossoCoutrixNigay.pdf",
   "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet",
   "abstract": "Sliders are widely used on mobile devices. Envisioning mobile devices that can dynamically deform to raise tangible controls from the screen surface, tangible sliders offer the benefit of eyes-free interaction. However, reaching for distant values with one hand is problematic: users namely need to change their handgrip, which is not comfortable. To overcome this problem, this paper sets out to experimentally study an extendable tangible slider to support one-handed clutching. The tangible slider’s knob extends to maintain the thumb's movement within its comfortable area. We first built a low-fidelity prototype made of a knob long enough to allow clutching. This low-fidelity prototype significantly improves performance when reaching distant targets, as compared to a standard tangible slider. We then built a higher-fidelity prototype, introducing actuation and allowing for a shorter knob. When used for clutching, the knob moves back towards the users’ thumb. Experimental results show that the motion of the actuated knob does not interrupt eyes-free interaction during manipulation. In comparison, a graphical extendable slider performed 0.9s slower due to the required visual attention. However, the results suggest that the motion of the actuated knob affects performance, as the higher-fidelity prototype performed 0.6s slower than the low-fidelity prototype.",
   "type_publi": "icolcomlec"
},
{
   "lang": "en",
   "type_publi": "these",
   "title": "Malleable Interactive Surfaces for Distant Mobile Tangible Interaction",
   "abstract": "Sliders are one of the most used widgets on mobile devices for the adjustment of continuous parameters (e.g., screen brightness, speaker sound volume). On mobile devices, sliders are represented graphically and are usually long and positioned in a vertical or horizontal way. These characteristics pose two major problems: a visual dependency to operate the graphical slider and a limited range of movement of the thumb when using the mobile device with a single hand. This thesis focuses on new eyes-free one-handed interaction techniques to efficiently operate sliders on mobile devices. The techniques rely on shape-changing tangible sliders capable of changing different design properties (e.g., orientation, length and side of the mobile device where it is presented) in order to support eyes-free one-handed interaction. Results from seven different experiments suggest that: 1) a conventional tangible slider delivers good performance but requires handgrip changes when acquiring targets in a distance range of 70mm. 2) a dual-side tangible slider delivers good performance and supports a stable handgrip when acquiring targets in a distance range of 100mm. 3) an extendable tangible slider delivers good performance and supports a stable handgrip when acquiring targets in a distance range of 200mm. Moreover, the performed experiments allowed the exploration of a part of shape-changing tangible user interfaces that has barely been studied: manipulation during shape-change. The performed studies show how different shape-changing design characteristics, like the orientation and amplitude, can impact the interaction.\r\n",
   "year": 2018,
   "uri": "http://iihm.imag.fr/publication/R18a/",
   "id": 851,
   "bibtype": "phdthesis",
   "abbr": "R18a",
   "authors": {
      "1": {
         "first_name": "Juan Pablo",
         "last_name": "Rosso Pirela"
      }
   },
   "date": "2018-12-14",
   "document": "http://iihm.imag.fr/publs/2018/70059_ROSSO_PIRELA_2018_archivage.pdf",
   "type": "Thèses et habilitations",
   "pages": "252"
},
{
   "lang": "fr",
   "type_publi": "colcomlec",
   "doi": "https://doi.org/10.1145/3132129.3132134",
   "title": "Curseur Tangible et Déformable sur Dispositifs Mobiles pour Interagir à une Main sans Regarder l’Écran / Deformable Tangible Slider for Eyes-Free One-Handed Thumb Interaction on Mobile Devices",
   "url": "https://dl.acm.org/citation.cfm?id=3132134",
   "abstract": "Graphical sliders are widely used on mobile devices. However, with a single hand, reaching for far values is difficult: users change their grip and can drop the device. Moreover, sliders require visual attention to operate them. Envisioning mobile devices that dynamically extend tangible sliders out of the screen, the contribution of this work is a first attempt to experimentally study a deformable tangible slider that facilitate thumb interaction on mobile devices. The deformable tangible slider expands its cursor (Figure 1) to avoid hand-grip changes by maintaining the thumb within its comfortable area. Moreover, its tangible aspect allows eyes-free interaction. We first compared a low-fidelity prototype with a classic tangible slider. The prototype improves performance by 9.2% when targets are outside the thumb’s comfortable area. We then designed a deformable slider that we compared to a classic tangible slider and a graphical one. Though the deformable slider is globally faster (14.3%) than the classic tangible one, the difference is not significant. While the graphical slider performs faster, the deformable tangible slider offers eyes-free interaction and stable hand-grip.",
   "year": 2017,
   "uri": "http://iihm.imag.fr/publication/RCJ+17a/",
   "pages": "21-31",
   "bibtype": "inproceedings",
   "id": 807,
   "abbr": "RCJ+17a",
   "authors": {
      "1": {
         "first_name": "Juan Pablo",
         "last_name": "Rosso Pirela"
      },
      "2": {
         "first_name": "Céline",
         "last_name": "Coutrix"
      },
      "3": {
         "first_name": "Matt",
         "last_name": "Jones"
      },
      "4": {
         "first_name": "Laurence",
         "last_name": "Nigay"
      }
   },
   "date": "2017-08-29",
   "document": "http://iihm.imag.fr/publs/2017/CurseurDeformable.pdf",
   "type": "Conférences nationales avec comité de lecture sur texte complet",
   "booktitle": "29ème conférence francophone sur l'Interaction Homme-Machine, IHM 2017, Poitiers, France, ACM"
},
{
   "lang": "en",
   "type_publi": "icolcomlec",
   "doi": "http://dx.doi.org/10.1145/2858036.2858097",
   "title": "Emergeables: Deformable Displays for Continuous Eyes-Free Mobile Interaction",
   "abstract": "We present the concept of Emergeables  – mobile surfaces that can deform or ‘morph’ to provide fully-actuated, tangible controls. Our goal in this work is to provide the flexibility of graphical touchscreens, coupled with the affordance and tactile benefits offered by physical widgets. In contrast to previous research in the area of deformable displays, our work focuses on continuous controls (e.g., dials or sliders), and strives for fully-dynamic positioning, providing versatile widgets that can change shape and location depending on the user’s needs. We describe the design and implementation of two prototype emergeables built to demonstrate the concept, and present an in-depth evaluation that compares both with a touchscreen alternative. The results show the strong potential of emergeables for on-demand, eyes-free control of continuous parameters, particularly when comparing the accuracy and usability of a high-resolution emergeable to a standard GUI approach. We conclude with a discussion of the level of resolution that is necessary for future emergeables, and suggest how high-resolution versions might be achieved.",
   "authors": {
      "1": {
         "first_name": "Simon",
         "last_name": "Robinson"
      },
      "2": {
         "first_name": "Céline",
         "last_name": "Coutrix"
      },
      "3": {
         "first_name": "Jennifer",
         "last_name": "Pearson"
      },
      "4": {
         "first_name": "Juan Pablo",
         "last_name": "Rosso Pirela"
      },
      "5": {
         "first_name": "Matheus",
         "last_name": "Torquato"
      },
      "6": {
         "first_name": "Laurence",
         "last_name": "Nigay"
      },
      "7": {
         "first_name": "Matt",
         "last_name": "Jones"
      }
   },
   "year": 2016,
   "uri": "http://iihm.imag.fr/publication/RCP+16a/",
   "pages": "13",
   "bibtype": "inproceedings",
   "id": 756,
   "abbr": "RCP+16a",
   "address": "Santa Clara, USA",
   "date": "2016-05-07",
   "document": "http://iihm.imag.fr/publs/2016/EmergeablesArticle.pdf",
   "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet",
   "booktitle": "Proceedings of the 34th international conference on Human factors in computing systems (CHI 2016), San Jose, CA, USA, May 7-12, 2016 "
},
{
   "lang": "fr",
   "type_publi": "colcomlec",
   "doi": "http://dx.doi.org/10.1145/3004107.3004123",
   "title": "Curseurs Tangibles sur Dispositifs Mobiles : Impact de la Conception sur les Performances",
   "abstract": "Touch interaction is almost omnipresent on mobile devices and technological advances have made screens bigger. The users can then interact with more content displayed on screen but it is more difficult for the users to reach all the parts of the screen with one thumb. At the same time, researchers are exploring mobile interaction with deformable tangible interfaces. Bringing tangible objects to the flat screen brings a new perspective on the reachability problem of the thumb. In this work, we explore the impact on performance for thumb interaction within and outside the functional area of the thumb, while operating a tangible slider. Experimental results demonstrate that the size of  the motor space has a significant impact on performance. Operations within and outside the easily reachable area of the thumb show marginal difference of performance.",
   "authors": {
      "1": {
         "first_name": "Juan Pablo",
         "last_name": "Rosso Pirela"
      },
      "2": {
         "first_name": "Céline",
         "last_name": "Coutrix"
      },
      "3": {
         "first_name": "Matt",
         "last_name": "Jones"
      },
      "4": {
         "first_name": "Laurence",
         "last_name": "Nigay"
      }
   },
   "year": 2016,
   "uri": "http://iihm.imag.fr/publication/RCJ+16a/",
   "pages": "70-78",
   "bibtype": "inproceedings",
   "id": 769,
   "abbr": "RCJ+16a",
   "address": "Fribourg, Suisse",
   "date": "2016-10-25",
   "document": "http://iihm.imag.fr/publs/2016/proceedings.pdf",
   "type": "Conférences nationales avec comité de lecture sur texte complet",
   "booktitle": "Actes de la 28ème conférence francophone sur l'Interaction Homme-Machine"
}]);