Timothy S. Miller

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An important feature of ligand-gated ion channels is their exquisite ability to discriminate between ions. Still, little is known about the mechanisms underlying, or structural determinates of, this ability. We examined the structural elements underlying the ionic selectivity of rho1 GABA receptors expressed in Xenopus oocytes and human embryonic kidney(More)
We present Fluid Inking, a generally applicable approach to augmenting the fluid medium of free-form inking with gestural commands. Our approach is characterized by four design criteria, including: 1) pen-based hardware impartiality: all interactions can be performed with a button-free stylus, the minimal input hardware requirement for inking, and the least(More)
We present results from a user study that compared six visualization methods for two-dimensional vector data. Users performed three simple but representative tasks using visualizations from each method: 1) locating all critical points in an image, 2) identifying critical point types, and 3) advecting a particle. Visualization methods included two that used(More)
This paper describes preliminary work in a project to add force feedback to user interface elements of the X Window System in an attempt to add true " feel " to the window system's " look and feel ". Additions include adding ridges around icons and menu items to aid interaction, alignment guides for moving windows, and other enhancements to window(More)
We present results from a user study that compared six visualization methods for 2D vector data. Two methods used different distributions of short arrows, two used different distributions of integral curves, one used wedges located to suggest flow lines, and the final was line-integral convolution (LIC). We defined three simple but representative tasks for(More)
GestureBar is a novel, approachable UI for learning gestural interactions that enables a walk-up-and-use experience which is in the same class as standard menu and toolbar interfaces. GestureBar leverages the familiar, clean look of a common toolbar, but in place of executing commands, richly discloses how to execute commands with gestures, through animated(More)
We present MathPaper, a system for fluid pen-based entry and editing of mathematics with support for interactive computation. MathPaper provides a paper-like environment in which multiple mathematical expressions and even algorithms can be entered anywhere on the page. Mathematical expressions can also be modified using simple deletion and dragging gestures(More)
We present a range of novel interactions enabled by a simple modification in the design of a computer mouse. By converting each mouse button to <i>pop through</i> tactile push-buttons, similar to the focus/shutter-release buttons used in many cameras, users can feel, and the computer can sense, two distinct "clicks" corresponding to pressing lightly and(More)
We present an experimental study that evaluates four different techniques for visualizing the machine interpretation of handwritten mathematics. Typeset in Place puts a printed form of the recognized expression in the same location as the handwritten mathematics. Adjusted Ink replaces what was written with scaled-to-fit, cleaned up handwritten characters(More)