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A smart helmet has been developed that is able to detect of hazardous events in the mines industry. In the development of helmet, we have considered the three main types of hazard such as air quality, helmet removal, and collision (miners are struck by an object). The first is the concentration level of the hazardous gases such as CO, SO2, NO2, and particulate matter. The second hazardous event was...
Deficiency in fresh water resources globally has raised serious alarms in the last decade. Efficient management of water resources play an important role in the agriculture sector. Unfortunately, this is not given prime importance in the third world countries because of adhering to traditional practices. This paper presents a smart system that uses a bespoke, low cost soil moisture sensor to control...
In this paper, a wireless sensor network based measurement system was proposed to conduct real-time measurement of energy consumption of household appliances and display this information on a graphical user interface on a computer. The system was also able to calculate an optimized schedule for the appliances to reduce energy cost in terms of time of use (TOU) tariffs. The sensor node and sink node...
As the use of wireless sensor networks (WSNs) has grown enormously in the past few decades, the need of scalable & energy efficient routing and data aggregation protocol for large-scale deployments has also risen. LEACH is a hierarchical clustering protocol that provides an elegant solution for such protocols. One deficiency that affects the performance of the protocol is existence of very large...
Ubiquitous patient care monitoring system can be defined as the combination of communication technology and body sensor nodes. Ubiquitous patient care monitoring is the part of telemedicine monitoring, an application communication protocol which is HTTP (Hypertext Transfer protocol), used to access information from handheld devices such as PCs, PDA (personal digital assistant) etc. which have the...
This paper presents the design of an adaptive HVAC based on psychrometric analysis and a De-Centralized control Algorithm for an Autonomous Wireless Sensor Network. The proposed system aims to initially differentiate the area under consideration into active and inactive zones and perform control operations on them. The De-Centralized control methodology follows a K:1 transmission protocol for optimized...
The classical sequential change detection problem [1] aims at detecting a change in the state of a system from the normal state to the abnormal state at a random time T. The state of the system can not be observed directly and is observed only partially through the noisy observations Xk which are obtained at discrete time instants k = 1, 2, 3, ... . Given the state of the system, Xks are conditionally...
A middleware is a piece of software which resides between the main application and the physical infrastructure. Middleware processes the data coming from the physical sensor network and make them available to applications through various API. The conventional middleware available in the literature is very complex to use, because the application developer needs to have knowledge of hardware, embedded...
We consider the problem of tracking an intruder in a plane region by using a wireless sensor network comprising motes equipped with passive infrared (PIR) sensors deployed over the region. An input-output model for the PIR sensor and a method to estimate the angular speed of the target from the sensor output are proposed. With the measurement model so obtained, we study the centralized and decentralized...
In this paper, we study a wireless sensor network (WSN) as a social network in which the embedded sensors are the main entities as opposed to human beings in a traditional social network. In wireless sensor networks, the nodes resemble individuals in a way that they communicate with their peers, sometimes selectively hiding some information, sometimes selectively exposing some other information, generating...
We propose partial and full link reversal algorithms to bypass voids during geographic routing over duty-cycled wireless sensor networks. We propose a distributed approach that is oblivious to one-hop neighbor information. Upon termination of the algorithm, the resulting network is guaranteed to be destination-oriented. Further, to reduce the delays incurred under reactive link reversal, we propose...
One of the challenging issue in wireless sensor networks (WSNs) is efficiently route the multimedia information. In this letter, we propose an efficient geographic routing algorithm for multimedia data transmission such as audio, video, etc., in WSNs. It finds one near to shortest path per iteration and can be performed repeatedly iteration to find more on-demand shortest node-disjoint routing paths...
Due to the limited life time of batteries, biomedical implants typically use inductive coupling to transfer power to the implantable device. Inductive coupling of source and load coils suffers from low efficiency due to the low coupling between the coils. The low coupling limits the maximum transferable power and operating range of the system. Using a resonance-based coupling technique, the adverse...
Maximizing the lifetime of wireless sensor networks under constrained resources is an interesting problem that has gained increasing attention. Most methods assume an ideal link layer model when increasing the lifetime of wireless sensor networks and energy saving techniques using geographic routing remains largely unexplored. Based on a realistic link layer model, we propose a novel geographic routing...
We consider the problem of event detection in wireless sensor networks (WSNs) that are large in the sense that an event affects the statistics of the observations of a small number of sensors in the vicinity of where it occurs. An event occurs at a random time at a random location in the region (called the region of interest, ROI) covered by the WSN. We consider a distance based sensing model in which...
Advances in micro electro mechanical have triggered an enormous interest in wireless sensor networks. The difficulty of accurate location of sensor nodes has long been considered as very difficult to solve, when taking into account the realities of real world applications. In this paper localized problem is considered with the aim to improve accuracy in location estimation. It describes a distributed...
wildCENSE is a Wireless Sensor Network (WSN) system which attempts to monitor the behaviour and migration patterns of Barasingha (Swamp Deer). The system would collect the micro-climatic as well as positional information of the animal and communicate it to a base station through flooding of data using peer-to-peer network. The base station, using a gateway, will upload all the collected data to a...
This paper describes the implementation of a wireless sensor network for the temperature monitoring of shellfish catches over the internet. Temperature loggers in shellfish boxes transmit data through radio frequency to a base station. The information is transferred to a server via the GSM network, where it is processed and uploaded to a database. The web-based interface allows configuration of the...
Energy-aware routing is important in multi-hop wireless networks that are operated by battery power, e.g., wireless sensor networks. To maximize the network survivability, the energy efficiency of paths must be taken into account for route selection. Simple heuristics such as choosing paths with minimal energy consumption do not perform well, because the energy of the nodes on such paths may deplete...
Wireless sensor nodes are expected to make economical, energy efficient decisions in routing of data with the limited amount of battery-voltage that they have. To make overall energy-efficient decisions, an approximation of the system energy levels can be made available to the sensor nodes. The aim of this work is to propose an algorithm to get the cluster-wise global energy status of sensors' residual...
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