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This work is motivated by the strong demand for flash-friendly index designs to resolve reliability and performance concerns for data manipulation over flash memory. In comparison to previous work, we propose and explore the impact of hot-data access, sibling-link updates, and different workload types to a tree index structure over flash memory. In particular, a flash-friendly -tree, referred...
This work is motivated by the strong demands of flash-friendly index designs to resolve reliability and performance concerns for data manipulations over flash memory. Different from the past work, we propose and explore the impacts of hot-data access and sibling-link updates to a tree index structure over flash memory. In particular, a flash-friendly B+-tree, referred to as a Durable B+-tree, is proposed...
Wireless sensor networks have been extensively adopted in numerous application scenarios. However, increasing environmental constraints and performance requirements has spurred the development of tools to expedite deployment and minimize human intervention. This study extends previous work by the authors in network development and aims at the performance evaluation of applications operating in to-be-deployed...
Wireless sensor networks (WSNs) have been extensively researched recently. This paper makes two contributions to this field. First, we promote a new concept of long-thin (LT) topology for WSNs, where a network may have a number of linear paths of nodes as backbones connecting to each other. These backbones are to extend the network to the intended coverage areas. At the first glance, a LT WSN only...
In the IEEE 802.15.4 standard, two different operation modes are specified: the beacon-enabled networks, and non-beacon networks. The devices in a beacon-enabled network synchronize with each other and the beacon frame which is treated as synchronization signal also provides some extended features. On the other hand, a beacon-enabled device is hard to implement. Highly processing power is required...
Although we can use telecomm technologies such as MMS to access various services, right now we do not have a good method to access several services at a time. In this paper, we propose a service-based P2P mobile sensor network (SPMSN) architecture. It allows users to adopt an integrated method to access various services even these services are not in the same physical network. An efficient communication...
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