The performance of a mobile ad hoc network depends on its ability to adapt to changes in the network topology. It is therefore important to understand the relation between node mobility and topology dynamics. While the input parameters of a mobility model allow for generating different simulation scenarios (e.g., by selecting the speed, pause time, system area, and number of nodes), the relatio...

With the aim of improving the performance of Mobile IP, several proposals based on the concept of micro-mobility have been proposed. In this an analytical model for the performance evaluation of a number of handover micro-mobility schemes is developed.

PURPOSE To determine whether glaucoma affects mobility performance and whether there is a relationship between mobility performance and stage of disease as estimated from vision-function measures. METHODS The mobility performance of 47 glaucoma subjects was compared with that of 47 normal-vision subjects who were of similar age. Mobility performance was assessed by the time required to comple...

Future Low Earth Orbiting spacecrafts will contain several IP-enabled devices, such as Earth observing equipment, that will be accessible by terrestrial users through the Internet. Mobility solutions, such as Mobile IPv6, can be used to handle the mobility of individual devices as the spacecraft moves around the Earth and handsover between ground stations. Mobility management of individual host...

BACKGROUND Polypharmacy is a well-established risk factor for falls, and these are one of the major health problems that affect the quality of life as people age. However, the risk of mobility and cognitive impairments consecutive to polypharmacy has been little addressed, despite the association between these adverse outcomes and falls. Moreover, the rare polypharmacy cut-offs were all but one...

BACKGROUND Physical activity (PA) has many health benefits but may increase falls risk among older adults. We study how objectively measured habitual daily PA is related to falls by exploring the modifying effect of mobility limitations and the mediating roles of fitness and lower-limb strength. METHODS One thousand six hundred fifty-five (53%) of 3137 surviving participants (men age 71-91 yr...

A Mobile Ad-Hoc Network (MANET) is a self-configuring network of mobile nodes connected by wireless links to form an arbitrary topology without the use of existing infrastructure. In this paper, we have studied the effects of various mobility models on the performance of two routing protocols Dynamic Source Routing (DSR-Reactive Protocol) and Destination-Sequenced Distance-Vector (DSDV-Proactiv...

A systematic literature review was conducted to evaluate the effectiveness of interventions within the scope of occupational therapy practice to improve or maintain the driving performance and community mobility of older adults with low vision. The results of this review identified a limited number of articles-eight-that met the inclusion criteria. Identified intervention strategies included th...

Mainstream sociological studies of intergenerational social mobility have emphasised social factors such as education and the material and cultural resources of the family of origin as the main influences on the chances and direction of social mobility. Medical sociology in contrast has been more interested in its physical correlates such as height and health status. Data from the West of Scotl...