We study the throughput capacity of large ad hoc networks confined to a square region of fixed area, thus exploring the dependence of the achievable throughput on the spatial node density. We find that there exists the value of the node density (the “critical” density) depending on the ratio of the total noise power to the transmit power such that the throughput increases as n(α−1)/2 at first, ...

The purpose of this article is to link high density in social networks with their underlying bipartite affiliation structure. Density is represented by an average number of a node’s neighbors (i.e. node degree or node rank). It is calculated by dividing a number of edges in a graph by a number of vertices. We compare an average node degree in real-life affiliation networks to an average node de...

The fundamental characteristic which differentiates MANETs from other wireless or wired network is mobility and node density. Mobile Wireless Ad Hoc Networks (MANET) is a network without infrastructure, where every node functions as transmitter, router and data sink. Therefore, MANET routing protocols are designed to adaptively cater for dynamic changes in topology while maximizing throughput a...

OBJECTIVE To determine if the density of FOXP3+ lymphocytes in primary tumors and lymph nodes in pancreatic cancer correlates with the presence of lymph node metastases. METHODS FOXP3+ lymphocyte density in primary pancreatic cancer tissue and draining lymph nodes was measured using immunohistochemistry. We analyzed the clinical and pathological aspects associated with the accumulation of FOX...

This paper is an extension of previously proposed a novel clustering scheme, called D-LEACH, that is based on the calculation of local node density to increase the WSN lifetime by efficiently reducing energy consumption at the sensor node. In this paper, we present both mathematical analysis and performance evaluations of our proposed D-LEACH in view of energy consumption of network. By compute...

We propose an adaptive power based transmission scheme for WSN (Wireless Sensor Networks) where transmit power is adapted depending on node density and channel conditions so as to maintain a desired level of signal detection probability at a receiving node as demanded by sensing range. In existing Fixed Transmit Power Scheme (FTPS), detection probability degrades with decrease in node spatial d...

conclusions psa, psa density, and gleason score should be considered together in order to more accurately predict the adverse pathologic features of prostate cancer. methods we conducted a cross-sectional study of 105 patients with localized prostate cancer who underwent radical prostatectomy between 2006 and 2013. we recorded gleason scores and psa levels, in addition to the results of patholo...

PURPOSE To determine the impact of lymph node density (LND) on survival after inguinal lymph node dissection (ILND) for penile cancer. MATERIALS AND METHODS Our institutional penile cancer database was queried for patients who underwent ILND. Clinicopathologic characteristics including LND and total number of positive lymph nodes (LNs) were analyzed to determine impact on recurrence-free surv...

Wireless sensor networks (WSNs) deployed in hostile environments suffer from a high rate of node failure. We investigate the effect of such failure rate on network connectivity. We provide a formal analysis that establishes the relationship between node density, network size, failure probability, and network connectivity. We show that large networks can maintain connectivity despite a significa...