Now showing items 1-20 of 24

    • Perceiving Surface Roughness via a Rigid Probe: Effects of Exploration Speed and Mode of Touch 

      Lederman, S.J.; Klatzky, R.L.; Hamilton, C.L.; Ramsay, G.I. (Haptics-e, 1999-10-07)
      Two experiments investigated the psychophysical consequences for roughness perception of altering the speed of motion with which textured surfaces are explored using a rigid probe. Two speed ranges were used: a 10-fold ...
    • Human Psychophysics for Teletaction System Design 

      Moy, G.I.; Singh, U.; Tan, E.; Fearing, R.S. (Haptics-e, The electronic journal of haptics research, 2000-02-18)
      In this paper, we quantify several perceptual capabilities of the human tactile system needed for teletaction. We develop a model of a teletaction system based on predicted subsurface strain. Psychophysics experiments ...
    • Closed-Loop Force Control for Haptic Simulation of Virtual Environments 

      Carignan, C.R.; Cleary, K.R. (Haptics-e, The electronic journal of haptics research, 2000-02-23)
      This paper investigates the use of force control for improving haptic force feedback used in virtual reality simulations. Advances in control system design will help increase the fidelity of the haptic feedback thus giving ...
    • Judging the Orientation of Sinusoidal and Square-Wave Virtual Gratings Presented via 2-DOF and 3-DOF Haptic Interfaces 

      Weisenberger, J.M; Krier, M.J.; Rinker, A. (Haptics-e, The electronic journal of haptics research, 2000-03-28)
      The ability of observers to resolve the orientation of virtual gratings presented on two different haptic interfaces was investigated. Gratings were presented either with the 2-degree-of-freedom Immersion IE2000, or with ...
    • A Unified Treatment of Elastostatic Contact Simulation for Real Time Haptics 

      James, Doug; Pai, Dinesh (Haptics-e, The electronic journal of haptics research, 2001-09-27)
      We describe real-time, physically-based simulation algorithms for haptic interaction with elastic objects. Simulation of contact with elastic objects has been a challenge, due to the complexity of physically accurate ...
    • Virtual Training for a Manual Assembly Task 

      Adams, R.J.; Klowden, D.; Hannaford, Blake (Haptics-e, The electronic journal of haptics research, 2001-10-17)
      This paper describes an experiment, conducted to investigate the benfits of force feedback for virtual reality training of a real task. Three groups of subjects received different levels of training before completing a ...
    • Haptic Rendering of Cutting: A Fracture Mechanics Approach 

      Mahvash, Mohsen; Hayward, Vincent (Haptics-e, The electronic journal of haptics research, 2001-11-20)
      Cutting a deformable body may be viewed as an interchange between three forms of energy: the elastic energy stored in the deformed body, the work done by a sharp tool as it moves against it, and the irreversible work spent ...
    • A Haptic Back Display for Attentional and Directional Cueing 

      Tan, Hong; Gray, Robert; Young, J. Jay; Taylor, Ryan (Haptics-e, The electronic journal of haptics research, 2003-06-11)
      We have been developing a haptic back display using a 3-by-3 tactor array. This paper reports two studies that investigated the use of such a display for delivering attention- and direction-related information to its user. ...
    • Kane's Equations for Haptic Display of Multibody Systems 

      Gillespie, R. Brent (Haptics-e, The electronic journal of haptics research, 2003-08-18)
      The design of a general-purpose multibody simulator that runs in real-time and features haptic display is presented. The repertoire of this simulator includes systems subject to holonomic con-straints, nonholonomic ...
    • Implementation and Evaluation of a Haptic Playback System 

      Williams, Robert L.; Srivastava, Mayank; Conaster, Robert; Howell, John N. (Haptics-e, The electronic journal of haptics research, 2004-05-03)
      This article presents implementation and evaluation of a haptic playback system using the PHANToM haptic inerface, in the context of our Virtual Haptic Back Project at Ohio University. Playback has the potential to improve ...
    • Design and Performance of a Tactile Shape Display Using RC Servomotors (Short Paper) 

      Wagner, C.R.; Lederman, S.J.; Howe, R.D. (Haptics-e, The electronic journal of haptics research, 2004-08-06)
      Tactile displays are used to convey small-scale force and shape information to the fingertip. We describe a 6x6 tactile shape display design that is low in cost and easily constructed. It uses commercially available RC ...
    • Synchronization analysis of the uterine magnetic activity during contractions 

      Ramon, Ceon; Preissl, Hubert; Murphy, Pam; Wilson, James D.; Lowery, Curtis; Eswaran, Hari (2005)
      Background: Our objective was to quantify and compare the extent of synchronization of the spatial-temporal myometrial activity over the human uterus before and during a contraction using transabdominal magnetomyographic (MMG) ...
    • Haptic Simulation of Linear Elastic Media with Fluid Inclusions 

      Gosline, A.H.; Salcudean, S.E.; Yan, J. (Haptics-e, The electronic journal of haptics research, 2005-03-30)
      We present a fast technique for simulating fluid-filled elastic objects with the Finite Element Method. By simulating the presence of fluid with hydrostatic fluid pressure, a quasi-static simulation of fluid can be achieved ...
    • A Comparison of Learning with Haptic and Visual Modalities 

      Jones, M.G.; Bokinsky, A.; Tretter, T.; Negishi, A. (Haptics-e, The electronic journal of haptics research, 2005-05-03)
      The impact of haptic feedback on the perception of unknown objects (10 without texture, 10 with texture, and 2 complex shapes) was examined. Using a point probe (a PHANTOM), three treatment groups of students (visual, ...
    • Influence of head models on neuromagnetic fields and inverse source localizations 

      Ramon, Ceon; Haueisen, Jens; Schimpf, Paul H. (2006)
      Background: The magnetoencephalograms (MEGs) are mainly due to the source currents. However, there is a significant contribution to MEGs from the volume currents. The structure of the anatomical surfaces, e.g., gray and ...
    • Influence of head models on EEG simulations and inverse source localizations 

      Ramon, Ceon; Schimpf, Paul H.; Haueisen, Jens (2006)
      Background: The structure of the anatomical surfaces, e.g., CSF and gray and white matter, could severely influence the flow of volume currents in a head model. This, in turn, will also influence the scalp potentials and ...
    • Voxel-Based 6-DOF Haptic Rendering Improvements 

      McNeely, W.A.; Puterbaugh, K.D.; Troy, J.J. (Haptics-e, The electronic journal of haptics research, 2006-01-19)
      An approach is presented for realizing an order-of-magnitude improvement in spatial accuracy for voxel-based 6-DOF haptics. It trades constant-time performance for greater spatial accuracy. This helps to make 6-DOF haptics ...
    • Depth Discrimination with 2d Haptics During Static Viewing of 3d Angiograms 

      Yi, D.; Hayward, V. (Haptics-e, The electronic journal of haptics research, 2006-01-31)
      We describe a force feedback scheme that is able to provide for haptic depth perception for use during the static 2d viewing of 3d angiograms. The scheme returns 2d horizontal forces that bear some analogy with forces that ...
    • Force-Direction Discrimination is Not Influenced by Reference Force Direction (Short Paper) 

      Tan, H.Z.; Barbagli, F.; Salisbury, J.K.; Ho, C.; Spence, C. (Haptics-e, The electronic journal of haptics research, 2006-02-03)
      The authors report an experiment in which twenty-five participants discriminated force vectors presented along five directions (up, left, right, diagonally up left, diagonally up right). The force vectors were presented ...
    • Haptic Exploration and the Perception of Texture Orientations 

      Hughes, B. (Haptics-e, The electronic journal of haptics research, 2006-04-21)
      The perceptual sensitivity of touch to orientation differences in adjacent segments of textures with different configurations was measured in two experiments. We found that sensitivity to the orientation difference was not ...