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Adaptability and energy-efficient sensing are essential properties to sustain the easy deployment and lifetime of WSNs. These properties assume a stronger role in autonomous sensing environments where the application objectives or the parameters under measurement vary, and human intervention is not viable. In this context, this paper proposes LiteSense, a self-adaptive sampling scheme for WSNs, which...
Since energy comprises a meaningful share of total production cost due to its surged cost, manufacturing companies should strive to take energy issues into account when planning and managing production processes and facilities. Energy resources such as electrical power, water, steam, gas, etc. must be monitored and managed as any other traditional enterprise resources. The aim of this paper is to...
We present a wireless sensor network (WSN) for monitoring indoor air quality, which is crucial for people's comfort, health, and safety because they spend a large percentage of time in indoor environments. A major concern in such networks is energy efficiency because gas sensors are power-hungry, and the sensor node must operate unattended for several years on a battery power supply. A system with...
Demand side management and demand response aim to maximize the efficiency of the electricity delivery process by exploiting the flexibility of customers. At residential level, demand response can be applied only to a limited number of appliances, through load management, due to user intervention or dedicated automated actions. One category of appliances which concur well with demand response is the...
MapReduce has become a popular framework for Big Data applications. While MapReduce has received much praise for its scalability and efficiency, it has not been thoroughly evaluated for power consumption. Our goal with this paper is to explore the possibility of scheduling in a power-efficient manner without the need for expensive power monitors on every node. We begin by considering that no cluster...
Designing an ultra-low power sensor node requires careful consideration of the system-level energy budget. Depending on applications, various components can dominate total energy. In this paper, we review three different system energy budget scenarios where any of the microprocessor, memory, and timer of a sensor node can dominate the energy budget. The design space and corresponding trade-offs for...
Air quality monitoring in indoor environments is of great significance for comfort and health, especially nowadays that people spend more than 80% of the day indoor. We propose a flexible wireless system able to detect polluted air and dangerous situations in a complex and large environment. It is important for ambient intelligent systems to be unobtrusive and to optimize the power consumption of...
Regression models have been defined with the help of case studies, carried out for residential and commercial buildings in Sweden, for energy consumption patterns and predictions. Regression models are used as an input to Monte Carlo simulation technique to carry out energy predictions and future energy demand and supply patterns. Model is developed on the basis of historical data for four years:...
In this paper, the defrost characteristics of an air source heat pump (ASHP) unit with the split fin-tube heat exchangers was investigated experimentally. The dynamic heating capacity, input power, the wall temperature of outdoor heat exchanger and pressures of the heat pump system were measured. The defrost losses of the ASHP unit under the different frost conditions were analyzed. The experimental...
In the procedure of the wireless sensor network experiment a large amount of real-time wireless sensor network nodes are required to apperceive, collect and process the parameters of the surrounding environment in real time so that we can get detailed and accurate information about the substantial world. However, the existing nodes are expensive and complex, and they are not suitable for large-scale...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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