OBJECTIVE To define accelerometer cut points for different walking speeds in older adults with mild to moderate Parkinson's disease. METHOD A volunteer sample of 30 older adults (mean age 73; SD 5.4 years) with mild to moderate Parkinson's disease walked at self-defined brisk, normal, and slow speeds for three minutes in a circular indoor hallway, each wearing an accelerometer around the wais...

The moving sofa problem, posed by L. Moser in 1966, asks for the planar shape of maximal area that can move around a right-angled corner in a hallway of unit width, and is conjectured to have as its solution a complicated shape derived by Gerver in 1992. We extend Gerver’s techniques by deriving a family of six differential equations arising from the area-maximization property. We then use this...

The objectives of this study were to determine the effects of reducing light level on mobility performance in persons with age-related macular degeneration (ARMD) and how performance relates to measures of visual sensory and perceptual function. ARMD results in the loss of central, high-acuity vision and is the leading cause of vision loss in veterans participating in the blind rehabilitation p...

Previous studies suggest that humans rely on geometric visual information (hallway structure) rather than non-geometric visual information (eg doors, signs, and lighting) for acquiring cognitive maps of novel indoor layouts. In this study we asked whether visual impairment and age affect reliance on non-geometric visual information for layout learning. We tested three groups of participants-you...

Indoor localization is concerned with mapping sensory data to physical locations inside buildings. Location of a user or a mobile device is an essential part of the context, and is therefore very useful for pervasive computing applications. Many proposals exist for solving the localization problem, typically based on image or radio signal processing, though the problem is still generally consid...

ABSTRACT: This paper presents a new methodology for utilizing Augmented Reality (AR) fiducial markers on mobile devices (smart phone/tablet) for indoor Architecture, Engineering, Construction, and Facilities Management (AECFM) applications such as navigation and inspection. On one hand, previous efforts on such applications focused mainly on exploring traditional non-visual-sensor-based methods...

The city of Karbala w distinguished by its ancient history and civilization, as it played an essential economic commercial role in addition to well-known cultural religious place throughout different ages; this generated need for many related functional buildings. As a result, markets khanate have appeared, where they were geographically distributed between the center old external roads within ...

While many school retrofits in Korea tend to focus on energy savings, some operation practices and policies the field may cause indoor air quality issues. This study aims analyze impact when selected measures of retrofit package are applied classrooms a real context with actual airflow contaminant transport characteristics. The included replacement envelope windows/doors/hallway-side windows, m...

This study quantifies the significance of foot angle as it relates to common biometric data assess its use in clinical realm. There are two objectives this study; first determine relationship has with ten surveyed points (age, weight, height, biological makeup, shoe size, orthotic use, physical activity level, competitive sports history, lower extremity injury and reason for visiting doctor), s...

OBJECTIVE To explore the types of communication used within primary health care teams (PHCTs), with a particular focus on the mechanisms teams use to promote optimal clinical and administrative information sharing. DESIGN A descriptive qualitative study. SETTING Primary health care teams in Ontario between August 2004 and October 2005. PARTICIPANTS Purposive sampling was used to recruit 1...