Localization of Cooperative WSN using Distributed PSO with Optimum References

In indoor environment WSN nodes are deployed randomly and do not know the accurate position. Find the node position with the help of anchor nodes is known as localization. CRB algorithm selects the best anchor nodes which gives high accuracy. In this paper distributed PSO algorithm with optimum selection of reference nodes using CRB is proposed to find accurate node position. The proposed method performs better in comparison with other algorithms like PSO, RLS, LMS and GPS in terms of position accuracy, latency and complexity

The Hybrid ROC (HROC) Curve and its Divergence Measures for Binary Classification

In assessing the performance of a diagnostic test, the widely used classification technique is the Receiver Operating Characteristic (ROC) Curve. The Binormal model is commonly used when the test scores in the diseased and healthy populations follow Normal Distribution. It is possible that in real applications the two distributions are different but having a continuous density function. In this paper we considered a model in which healthy and diseased populations follow half normal and exponential distributions respectively, hence named it as the Hybrid ROC (HROC) Curve. The properties and Area under the curve (AUC) expressions were derived. Further, to measure the distance between the defined distributions, a popular divergence measure namely Kullback Leibler Divergence (KLD) has been used. Simulation studies were conducted to study the functional behavior of Hybrid ROC curve and to show the importance of KLD in classification

Confidence Interval Estimation of an ROC Curve: An Application of Generalized Half Normal and Weibull Distributions

In the recent past, the work in the area of ROC analysis gained attention in explaining the accuracy of a test and identification of the optimal threshold. Such types of ROC models are referred to as bidistributional ROC models, for example Binormal, Bi-Exponential, Bi-Logistic and so forth. However, in practical situations, we come across data which are skewed in nature with extended tails. Then to address this issue, the accuracy of a test is to be explained by involving the scale and shape parameters. Hence, the present paper focuses on proposing an ROC model which takes into account two generalized distributions which helps in explaining the accuracy of a test. Further, confidence intervals are constructed for the proposed curve; that is, coordinates of the curve (FPR, TPR) and accuracy measure, Area Under the Curve (AUC), which helps in explaining the variability of the curve and provides the sensitivity at a particular value of specificity and vice versa. The proposed methodology is supported by a real data set and simulation studies

High power, fixed and tunable wavelength, Grating-free Cascaded Raman fiber Lasers

Cascaded Raman lasers enable high powers at various wavelength bands inaccessible with conventional rare-earth doped lasers. The input and output wavelengths of conventional implementations are fixed by the constituent fiber gratings necessary for cascaded Raman conversion. We demonstrate here, a simple architecture for high power, fixed and wavelength tunable, grating-free, cascaded Raman conversion between different wavelength bands. The architecture is based on the recently proposed distributed feedback Raman lasers. Here, we implement a module which converts the Ytterbium band to the eye-safe 1.5micron region. We demonstrate pump-limited output powers of over 30W in fixed and continuously wavelength tunable configurations.Comment: 6 pages, 5 figures, final versio

Minimum energy consumption selection decode and forward routing protocol

84-89Mobile Ad hoc Network (MANET) is one of the complex tasks as topology changes frequently. Due to node mobility and node energy, rapid overtiredness due to limited battery power results in link breakages. Therefore topology, node mobility, and energy are the vital factor that has been affecting the performance of a routing protocol and reduce the overall network lifetime. A cooperative communication scheme called Minimum Energy consumption Selection Decode and Forward (MESDF) routing protocol, has been proposed in this paper to increase the network lifetime. Proposed routing protocol has included a cooperative table, a relay table, and a cooperative neighbor table to store the topological information. And that enforces cooperative transmission between the nodes, thereby enhancing robustness against the node mobility. Cooperative communication used multi-hop transmission between the source and destination nodes. That has determined the optimal route using the best possible relays with minimal energy consumption and considered link break probability and energy harvesting techniques to choose the optimal path. The simulation results clearly show that the robustness of the proposed method has increased against the node mobility and saved 21% of node energy in a selected approach which increased to 14% of the network lifetime compared to existing. cooperative and non-cooperative routing methods

Effect of γ-irradiation on the physicochemical properties, and microbial and sensory qualities of cold-stored onion puree.

The present study was conducted to evaluate the effect of different doses (0, 1, 2, 3, 5 and 7 kGy) of γ-irradiation on the physicochemical properties (pH, titratable acidity, total soluble solid, color, organic acid content), and also the microbial and sensory qualities of onion puree during cold storage at 4C for 28 days. The different doses of γ-irradiation were found to not have any negative effect on titratable acidity, pH, total soluble solid and organic acid contents of onion puree immediately after irradiation and also during cold storage. Irradiation at 3 kGy and above was able to control the development of yeasts and molds in the onion puree, but had negative effects on the color and sensory quality of the onion puree. This study indicates that irradiation at 2 kGy reduced microbial counts with minimum adverse effects on color and sensory qualities