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Well-organized big data get together in the densely distributed sensor networks is, therefore, a challenging research area. One of the most effective solutions to address this challenge is to utilize the sink node’s mobility to facilitate the data gathering. While this technique can reduce energy consumption of the sensor nodes, the use of mobile sink presents additional Challenges such as determining the sink node’s trajectory and cluster formation prior to data collection. In this paper, we propose a new mobile sink routing and data gathering method through network clustering based on modified ExpectationMaximization (EM) technique. In addition, we derive an optimal number of clusters to minimize the energy consumption. The effectiveness of our proposal is verified through numerical results.
Routing in Wireless Sensor Networks has to take into account the limited battery resources of the nodes. Sensor nodes can also be powered by other energy sources like solar energy. This paper provides a review of Environment monitoring using Wireless Sensor Networks. The issues related to environment sensor networks is highlighted. The real time applications in environment monitoring is presented with emphasis on energy conservation. Furthermore in this paper we address the problem of scavenging energy using solar powered devices.
Development is explain not as an empirical term (Reese and Overton1970) and on occasion as through it is (Kaplan 1983) . Many times as what ever happens across the life span is what constitutes development. The concept of development centers on value based notion of improvement. In life span perspective the development is life long, interactive, multidimensional, culturally historically embedded process, shows plasticity, involves both gain and losses and has multidisciplinary field of study. (Sugarman 2001) The quality of life is interpreted differently as satisfaction (Summers 1976), happiness( Esterling 1978),psychological wellbeing( Andrews and Withey 1978) and degree of fulfillment of individuals important goals(Frish 1089) .In Positive Psychology the scientifically unwieldy notion of happiness is broken down several more quantifiable aspect: positive emotion (the pleasant life) engagement (engaged life) and purpose(meaningful life). (Seligman 2008)
Clustering technique is the basic technique used in the wireless sensor network to enhance the lifetime of a sensor network by mitigating energy consumption and provide efficiency, scalability, and security. Formerly sensor nodes are considered to be homogeneous in which each node has the same processing capacity, energy and functionality, but to prolong network lifetime researches has been evolved to infuse heterogeneity in wireless sensor network such as to provide different energy level to some nodes. In this paper, we present a survey on basic clustering techniques for Heterogeneous wireless sensor networks.
Primary productivity and selected relevant associated physico-chemical parameters in the euphotic zone of Lagos Harbour, a tropical Harbour was monitored at NIOMR Jetty station (Latitude 6º 25 ´ 14, 88º N, Longitude 3º 24´ 24, 42º E) on a monthly basis from October, 2012 to March, 2013. Air and surface water temperature ranged from 23.5⁰C to 28⁰C and between 27 ⁰C and 30⁰C respectively. Alkaline pH ranged (7.81 to 8.45). Brackish salinity varied from 6.2 to 35.4PSU while Electrical conductivity minimum and maximum values were 11200 and 53300µS/cm respectively. Moderate dissolved oxygen ranged between 5.0mg/l and 6.4mg/l, slightly lower than 6.8mg/l standard suggested by FEPA. Total dissolved solid ranged from 7504 to 35711mg/l while Low Alkalinity varied between 12 and 20mg/l. Rainfall minimum and maximum values were 8.8 and 229mm respectively. Gross primary production (GPP) varied from 0.22 to 0.46gC/m 2 /day. The corresponding Net primary production (NPP)
As the world runs fast, its our duty to run with the world compensating its speed. There is an urge to prove everyone unique. Hence time management play a worthless role in the daily work of a person. At morning it is a herculean task to wake up from the bed. “Let me sleep for some more time” is the first slogan of everyone every morning. But feeling guilty for not waking up in the morning is also encountered in several cases. In this paper we propose a novel “Murderer Algorithm” based automatic waking up system that helps to wake up every morning. The uniqueness of the system is to make the person in the bed to wakeup and get away from the bed. The device employs simple capacitive touch sensor to sense the presence of a person and also a brig
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These can be expanded in the manner of a concertina. These wires are mainly used for the formation of military obstacles and this is what makes them really indispensable. Going by the latest advancements in science and technology, these wires are produced in factories in recent times and were individually created by soldiers at the time of World War . For More Detail: http://www.armstrongwires.com
This paper designs an observer to estimate the spacecraft’s angular velocity using only Euler angles attitude without gyroscope measurement. This work contributes as an alternative or backup system during unavailable gyroscope measurement due to faulty sensor or reduction of sensor hardware for cost reduction.In this work, the observer model for satellite attitude is derived in their nonlinear form, and the observability of the nonlinear system is investigated using Lie derivative. The performance of the designed observer is analyzed and verified using real flight data of Malaysian satellite by employing Extended Kalman Filter algorithm.