A Non-Cooperative Game Theoretical Approach For Power Control In Virtual MIMO Wireless Sensor Network

Power management is one of the vital issue in wireless sensor networks, where the lifetime of the network relies on battery powered nodes. Transmitting at high power reduces the lifetime of both the nodes and the network. One efficient way of power management is to control the power at which the nodes transmit. In this paper, a virtual multiple input multiple output wireless sensor network (VMIMO-WSN)communication architecture is considered and the power control of sensor nodes based on the approach of game theory is formulated. The use of game theory has proliferated, with a broad range of applications in wireless sensor networking. Approaches from game theory can be used to optimize node level as well as network wide performance. The game here is categorized as an incomplete information game, in which the nodes do not have complete information about the strategies taken by other nodes. For virtual multiple input multiple output wireless sensor network architecture considered, the Nash equilibrium is used to decide the optimal power level at which a node needs to transmit, to maximize its utility. Outcome shows that the game theoretic approach considered for VMIMO-WSN architecture achieves the best utility, by consuming less power.Comment: 12 pages, 8 figure

Trust Based Participant Driven Privacy Control in Participatory Sensing

Widespread use of sensors and multisensory personal devices generate a lot of personal information. Sharing this information with others could help in various ways. However, this information may be misused when shared with all. Sharing of information between trusted parties overcomes this problem. This paper describes a model to share information based on interactions and opinions to build trust among peers. It also considers institutional and other controls, which influence the behaviour of the peers. The trust and control build confidence. The computed confidence bespeaks whether to reveal information or not thereby increasing trusted cooperation among peers.Comment: 14 page

Estimation of the methane emission factor for the Italian Mediterranean buffalo

In order to contribute to the improvement of the national greenhouse gas emission inventory, this work aimed at estimating a country-specific enteric methane (CH4) emission factor for the Italian Mediterranean buffalo. For this purpose, national agriculture statistics, and information on animal production and farming conditions were analysed, and the emission factor was estimated using the Tier 2 model of the Intergovernmental Panel on Climate Change. Country-specific CH4 emission factors for buffalo cows (630 kg body weight, BW) and other buffalo (313 kg BW) categories were estimated for the period 1990–2004. In 2004, the estimated enteric CH4 emission factor for the buffalo cows was 73 kg/head per year, whereas that for other buffalo categories it was 56 kg/head per year. Research in order to determine specific CH4 conversion rates at the predominant production system is suggested

THE COMPLETE GUIDE TO CASHEWS: NUTRITION, HEALTH BENEFITS, AND POTENTIAL DRAWBACKS

Abstract The study is fully researcher past observation from the field. The researcher is from Panruti Taluka, which is more production cashews in Tamil Nadu. The researcher born and brought from this aria obliviously has a lot of ideas and usage in cashews. This article is a historical and experienced-based study. Hence, the article hasn’t the methodology and research hypothesis. This study is going to explain in details cashews nutrition’s, and it is benefits as well as demerits

Electrode effects on the observability of destructive quantum interference in single-molecule junctions

Destructive quantum interference (QI) has been a source of interest as a new paradigm for molecular electronics as the electronic conductance is widely dependent on the occurrence or absence of destructive QI effects. In order to interpret experimentally observed transmission features, it is necessary to understand the effects of all components of the junction on electron transport. We perform non-equilibrium Green's function calculations within the framework of density functional theory to assess the structure-function relationship of transport through pyrene molecular junctions with distinct QI properties. The chemical nature of the anchor groups and the electrodes controls the Fermi level alignment, which determines the observability of destructive QI. A thorough analysis allows to disentangle the transmission features arising from the molecule and the electrodes. Interestingly, graphene electrodes introduce features in the low-bias regime, which can either mask or be misinterpreted as QI effects, while instead originating from the topological properties of the edges. Thus, this first principles analysis provides clear indications to guide the interpretation of experimental studies, which cannot be obtained from simple H\"uckel model calculations.Comment: 12 pages, 8 figure

Set-up of a multi wavelength polar photometer for off-line absorption coefficient measurements on 1-h resolved aerosol samples

In this paper, a polar photometer (PP_UniMI) was set up to measure the aerosol absorption coefficient (\u3c3ap) at four wavelengths (\u3bb) on 1-h resolved aerosol samples collected using a streaker sampler. Due to the characteristics of such samples (small deposit area, low aerosol load, and limited substrate thickness 12 10 \u3bcm), the main technical developments aimed at reaching suitable limits of detection (LODs). To this aim, multiple scattering between the sample and a suitable substrate were exploited to amplify the system sensitivity to absorbing particle load. In the paper, the development and test of this innovative approach is presented. LODs for \u3c3ap in the range 5.0\u201311.6 Mm 121 were reached, depending on the wavelength. Such values were suitable for the analysis of 1-hour resolved samples collected at an urban background site in Milan (Italy) during a test campaign of 1-week carried out in winter 2015. The methodology was validated comparing \u3c3ap measurements performed by PP_UniMI at \u3bb=635 nm on the streaker sample to the data obtained by a Multi-Angle Absorption Photometer (MAAP) operated in parallel. Agreement within 10% was found. To check the results obtained at other wavelengths, \uc5ngstr\uf6m Absorption Exponent (AAE) was calculated from \u3c3ap measurements at 4-\u3bb. The AAE values resulted in the range of expectations for aerosol emitted by fossil fuel combustion (0.8\u20131.2) and wood burning (0.9\u20133.5), which are the main sources contributing to absorbing aerosol in urban areas in winter. The analytical methodology can be extended to samples collected with high time resolution using other high-time resolution samplers (e.g. drum rotating impactors). This is \u2013 as far as we know \u2013 the first time that \u3c3ap measurements are performed on streaker samples collected with 1-h resolution. Our results thus set PP_UniMI as an important tool for the community performing high time resolved sampling to widen the characterisation of such samples and to further develop source apportionment studies

PIXE and ToF-SIMS analysis of streaker samplers filters

This paper presents methodological innovations introduced in the characterisation of urban aerosol collected in Italy in a recent campaign. Two complementary ion beam analysis (IBA) techniques were used to analyse Nuclepore filters used in continuous streaker samplers to collect airborne particles in four Italian towns. Na to Pb elemental concentrations were obtained by particle induced X-ray emission (PIXE), while time of flight secondary ion mass spectrometry (ToF-SIMS) produced, on the same samples, time trends for several elements and molecular fragments. In addition, light attenuation measurements were used as a tracer for black carbon. The data produced by these three techniques was merged into a unique data set to address the characterisation of particulate matter sources. Correlations between elemental concentration trends (PIXE) and relative trends for molecular fragments (ToF-SIMS) and black carbon (light attenuation) have been studied by cluster and principal component analysis

Mediastinal Castleman's disease mimicking thoracic paravertebral schwannoma

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Analysis of outcomes of facial nerve decompression.

Paralysis of facial nerve is a cause of significant functional and aesthetic compromise. It is also accompanied with various social and psychological consequences. Most patients with facial paralysis recover spontaneously. Occasionally there lies as underlying potentially life threatening condition or a potentially curable condition which requires an early intervention. Few may spend their lives as facial cripples because treatment was not offered until death of facial nerve was established by electrical activity. Functional concerns primarily involve adequate protection of eye with a real risk of exposure keratitis if not properly addressed. In addition swallowing, drooling and speech difficulties may arise. The degree of suffering these patients feel however is far greater than these functional problems alone would produce. All the patients undergoing facial nerve decompression were analyzed and the outcomes were observed. An ideal reporting system for grading facial weakness is not available. The most commonly used House- Brackmann’s grading has inter observer variation. The grading system used for assessing improvement is a qualitative grading system , so an appropriate statistical analysis could not be used. Analysis was based on improvement by the number of grades. Improvement from grade VI – IV is not the same as the improvement from grade III – I , which was considered as improvement by 2 grades for analysis Sample size was small to arrive at definitive conclusions Follow up time to show significant improvement was variable between patients, which was not taken into consideration. Nerve grafting takes a longer time to show improvement in facial nerve weakness. So a standardized period of follow up can produce fallacies