Tag Archives: sensor networks

Privacy-Aware Object Representation for Surveillance Systems

Abstract Real-time object tracking, feature assessment and classification based on video are enabling technologies for improving situation awareness of human operators as well as for automated recognition of critical situations. To bridge the gap between video signal-processing output and spatio-temporal analysis of object behavior at the semantic level, a generic and sensor-independent object representation is [...]

Power Grids as Complex Networks. Typology and Fragility

Abstract We almost certainly agree that the harnessing of electricity can be considered the most important technological advance of the twentieth century. The development that allows this control is the power grid, an intricate system composed of generators, substations and transformers connected by cable lines hundreds of kilometers long. Its presence is nowadays so intertwined [...]

A Survey of Technical Requirements and Consumer Application Standards for IP-based Smart Grid AMI Network

Abstract The smart grid is a new advanced electrical network promoted by the government to address environmental sustainability, energy generation, distribution and consumption efficiency issues. As one of the enabling technologies, Advanced Metering Infrastructure refers to systems which measure, collect and analyze energy usage, and interact with advanced devices such as smart meters through various [...]

Powering Wireless Sensor Networks Nodes in Northern Europe Using Solar Cell Panel for Energy Harvesting

Abstract Harvesting energy from the sun is the most effective technology for outdoor applications. A combination of solar cells and chargeable batteries gives nodes with potentially eternal lifetime. The sun irradiance varies through the day and through the seasons, and is strongly dependent on the latitude. This must be taken into account if a wireless [...]

InSTEDD

Abstract Our work is often focused on addressing life-threatening gaps in communication and knowledge sharing — at the local level our projects have ranged from implementing an appointment reminder system for HIV/AIDS patients in Cambodia to supporting maternal child health workers in Mexico in text-messaging life-saving information to their patients. At the policy level, we [...]

Understanding and Using Rendezvous to Enhance Mobile Crowdsourcing Applications

Abstract Researchers are exploring the rendezvous concept—bringing sensors close to one another in space or time—as a way to make sense of disparate data collected by individuals. Applications such as participatory atmospheric sensing illustrate the potential of rendezvous to help create powerful mobile applications. Comments This paper describes an attempt to use web and mobile technologies [...]

Fundamentals of Energy-Constrained Sensor Network Systems

Abstract This article is an overview of energy-constrained sensor networks, focusing on energy-conserving communications and signal processing strategies. We assume battery driven nodes, employing robust communications, with little or no fixed infrastructure. Our discussion includes architectures, communications connectivity, capacity and scalability, mobility, network localization and synchronization, distributed signal processing, and cross-layer issues. Because energy is [...]

Fundamentals of Large Sensor Networks: Connectivity, Capacity, Clocks, and Computation

Abstract Sensor networks potentially feature large numbers of nodes. The nodes can monitor and sense their environment over time, communicate with each other over a wireless network, and process information that they exchange with each other. They differ from data networks in that the network as a whole may be designed for a specific application. [...]

Sensor Integration in a Wireless Sensor Network System for Environmental Monitoring System

Abstract This paper presents the implementation of the event-driven Wireless Sensor Network (WSN), which is used for environmental monitoring using soil moisture sensors. The problem faced is that the current Wireless Soil Sensor Networks are not reactive to the weather conditions around it. Which means it takes reading samples at constant rate throughout its operation. [...]

A Sensing Architecture for Mutual User-Environment Awareness Case of Study: A Mobility Aid for the Visually Impaired

Abstract In this paper, a platform to manage user-environment interaction is addressed. The core of the methodology consists of a continuous communication between a sensing module hosted on the user and a sensor network distributed in the environment. Such strategy provide the cognitive system with a continuous perception of both the environment and the user. [...]

Cognitive Diversity Sensing

Abstract Radar sensing is and will continue to have great importance in both the civil and military communities. This importance will increase in proportion to the tasks that radar is able to reliably carry out. New methodologies and new technical capabilities offer the potential for new functionality and improvements in existing ones. Radar is currently going [...]

Architecture of wireless sensor networks for environmental monitoring

Abstract There are various kinds of environmental sensor networks (ESNs) implementations for monitoring environment. These facilitate the study of environment pollution and fundamental processes of meteorology. They have evolved from passive logging systems that require manual downloading, into intelligent sensor networks that comprise a network of automatic sensor nodes and communications systems which actively communicate [...]

Pachube

Abstract Pachube (“patch-bay”) connects people to devices, applications, and the Internet of Things. As a web-based service built to manage the world’s real-time data, Pachube allows people  to share, collaborate, and compare information generated from the world around them. Comments Pachube began as an arts-centric project and is now a for-profit company that aggregates data [...]

Energy Harvesting Sensor Nodes: Survey and Implications

Abstract Sensor networks with battery-powered nodes can seldom simultaneously meet the design goals of lifetime, cost, sensing reliability and sensing and transmission coverage. Energy-harvesting, converting ambient energy to electrical energy, has emerged as an alternative to power sensor nodes. By exploiting recharge opportunities and tuning performance parameters based on current and expected energy levels, energy [...]