BACKGROUND Advancements in geographic information systems over the past two decades have increased the specificity by which an individual's neighborhood environment may be spatially defined for physical activity and health research. This study investigated how different types of street network buffering methods compared in measuring a set of commonly used built environment measures (BEMs) and t...

In this thesis, the performance investigation of packet services in both a standalone UMTS network and a UMTS network coexisting with other networks is undertaken. The investigations are concerned with the performance of a single link. Apart from objective performance metrics such as goodput and delay, subjective measures of user perceived QoS are also used. A real time emulation platform that ...

conclusions this was the first study that focused on expanding resilience indicators, and presents a new framework to simplify assessment of resilience and safety of a complex system. results in this study, 29 factors affecting this indicator were determined using the delphi method; the scores of all factors were less than the scores of the best practice. on the other hand, the state of this in...

This paper elaborates on seamless handover support for wireless IP multicast networks with the use of a novel mobility management mechanism. The latter enables mobile nodes with active multicast sessions to execute seamless remote subscriptions while changing their network attachment point and is formulated by extending the unicast ‘‘Fast Handovers for Mobile IPv6’’ protocol (FMIPv6). The propo...

The problem of reassembling an object from its parts or fragments has never been addressed with a unified computational approach, which depends on the pure geometric form of the parts and not application-specific features. We propose a method for the automatic reconstruction of a model based on the geometry of its parts, which may be computergenerated models or range-scanned models. The matchin...

The poor quality of Voice over IP can be improved by adaptive playout buffering at the receiver. This technique dynamically adapts the playout deadline to network conditions, thus minimizing both late packet loss and buffering time. A standard playout buffer strategy uses an estimate (Exponentially Weighted Moving Average) of the mean and variance of network delay to set the playout deadline. T...

In this article, different buffering techniques used to solve the contention problem in ATM switching architectures are compared. Then, the buffer requirements needed to achieve a given Quality of Service (QoS) is determined. Based on the results, we propose a Combined Central and Output Queuing (CCOQ) technique to be used in designing large-scale ATM switches for high-speed networks.

a study of substantial anthropogenic related pollution in the coastal samut prakarn province (thailand) was carried out focusing on the bang pu nature reserve (remnant mangrove wetland) using a remote sensing (geospatial) technique. statistical regression models were developed between biochemical parameters of sample point and related reflectance data obtained from satellite imagery (landsat...

The existing buffers algorithms cannot effectively to meet the demands of high accuracy buffer analysis in practice although many efforts have been made past 60 years. A generalized buffering algorithm (GBA) is presented, which considers geometric distance and attribute characteristics all instances within zone. proposed includes three major steps: (1) select initialize target instance; (2) det...

Network-based intrusions have become a serious treat to the users of the Internet. To help cover their tracks, attackers launch attacks from a series of previously compromised systems called stepping stones. Timing correlations on incoming and outgoing packets can lead to detection of the stepping stone and can be used to trace the attacker through each link. Existing approaches, however, delib...