Even though text is pervasive in most 3D applications, there is surprisingly no native support for text rendering in OpenGL. To cope with this absence, Mark Kilgard introduced the use of texture fonts [Kilgard 1997]. This technique is well known and widely used and ensures both good performances and a decent quality in most situations. However, the quality may degrade strongly in orthographic m...

ABSTRACT In this paper, model-based and model-free image based visual servoing (VS) approaches are implemented on a microassembly workstation, and their regulation and tracking performances are evaluated. A precise image based VS relies on computation of the image jacobian. In the modelbased visual servoing, the image Jacobian is computed via calibrating the optical system. Precisely calibrated...

Ultra-Wideband (UWB) is an emerging technology for short-range wireless communications. Due to the high bandwidth of UWB signals, accurate ranging and positioning is possible, which is one of many reasons why UWB is a candidate physical layer for another emerging research area; that of wireless sensor networks (WSNs). In this work, we argue that the ranging algorithm design should be made with ...

The mobile terminal positioning problem is categorized into three different types according to the availability of (1) initial accurate location information and (2) motion measurement data. Location estimation refers to the mobile positioning problem when both the initial location and motion measurement data are not available. If both are available, the positioning problem is referred to as pos...

In this paper, a Lorentz force-based XY positioning stage with a stack of four electromagnetic linear motors in parallel configuration is presented. The overall design of the positioning stage consists of a mobile and a fixed part separated using a fourpoint contact technique. The uniqueness of the proposed positioning stage lies in its light design with the ability to perform variable strokes ...

Using mobile smart devices to provide urban location-based services (LBS) with sub-meter-level accuracy (around 0.5 m) is a major application field for future global navigation satellite system (GNSS) development. Real-time kinematic (RTK) positioning, which is a widely used GNSS-based positioning approach, can improve the accuracy from about 10-20 m (achieved by the standard positioning servic...

OBJECTIVE To find an association between cognitive-perceptual problems of older drivers and unsafe driving performance during simulated automobile driving in a virtual environment. DESIGN Cross-sectional study. SETTING A driver evaluation clinic in a rehabilitation hospital. PARTICIPANTS Fifty-five drivers aged 65 years or older and 48 drivers in their late twenties to early forties. ME...

This paper presents the description and experimental results of a versatile Visual Marker based Multi-Sensor Fusion State Estimation that allows to combine a variable optional number of sensors and positioning algorithms in a loosely-coupling fashion, incorporating visual markers to increase its performances. This technique allows an aerial robot to navigate in different environments and carryi...

Many have proposed that autobiographical stories do more than describe a pre-existing self. Sometimes narrators can change who they are, in part, by telling stories about themselves. But how does this narrative self-construction happen? Most explanations rely on the representational function of autobiographical discourse. These representational accounts of narrative self-construction are necess...