Neutrophil mobility in 60 patients with vitamin D-deficient rickets is studied, and the patients are followed after therapy by 600,000 units vitamin D. 28 of 60 patients (46%), had low chemotaxis for neutrophils before vitamin D injection (migration), and 36 of 60 (60%) had low random mobility. The results showed a significant improvement after vitamin D therapy furthermore, the level of c...

In this paper, we used the time-of-flight (TOF) of a charge packet, that injected by a voltage pulse to calculate the drift velocity and mobility of holes in organic semiconducting polymers. The technique consists in applying a voltage to the anode and calculating the time delay in the appearance of the injected carriers at the other contact. The method is a simple way to determine the charge t...

Traditionally, mobility in ad hoc networks was considered a necessary evil that hinders node communication. However, it has recently been recognized that mobility can be turned into a useful ally, by making nodes carry data between disconnected parts. Yet, this model of routing requires new theoretical tools to analyse its performance. A mobility-assisted or encounter-based protocol forwards da...

Delay Tolerant Network (DTN) is an emerging networking technology that is widely used in the environment where end-to-end paths do not exist. DTN follows store-carry-forward mechanism to route data. This mechanism exploits the mobility of nodes and hence the performances of DTN routing and application protocols are highly dependent on the underlying mobility of nodes and its characteristics. Th...

In this paper, we have done a comparative study for a set of protocols supporting IP mobility, such as Mobile IP (MIP), Hierarchical Mobile IP (HMIP), Wireless IP, Cellular IP, HAWAII, TeleMIP and Dynamic Mobility Agent (DMA). These IP-based mobility protocols will play an important role in the convergence of IP and legacy wireless networks, within the context of the future 4G networks. TeleMIP...

In mobile communications, mobility modeling is involved in several aspects related to signaling and traffic load analysis. In third generation systems, the influence of mobility on the network performance (e.g., handover rate) will be strengthened, mainly due to the huge number of mobile users in conjunction with the small cell size. In particular, the accuracy of mobility models becomes essent...

PURPOSE To investigate evidence-based visual field size criteria for referral of low-vision (LV) patients for mobility rehabilitation. METHODS One hundred and nine participants with LV and 41 age-matched participants with normal sight (NS) were recruited. The LV group was heterogeneous with diverse causes of visual impairment. We measured binocular kinetic visual fields with the Humphrey Fiel...

As the number of Mobile IP user grows, the signal message overhead which is associated with mobility management in the IP networks will be concerned. It presents a critical challenge to Mobile IP as the number of mobile environment devices scale up. This paper introduces an efficient movement management method which reduces the cost of the mobility signal messages of a mobile user. The proposed...