Performance of the image statistics decoder in conjunction with the Goldstone-VLA array

During Voyager's Neptune encounter, the National Radio Astronomy Observatory's Very Large Array (VLA) will be arrayed with Goldstone antennas to receive the transmitted telemetry data from the spacecraft. The telemetry signal from the VLA will drop out periodically, resulting in a periodic drop in the received signal-to-noise ratio (SNR). The Image Statistics Decoder (ISD), which assumes a correlation between pixels, can improve the bit error rate (BER) for images during these dropout periods. Simulation results have shown that the ISD, in conjunction with the Goldstone-VLA array can provide a 3-dB gain for uncompressed images at a BER of 5.0 x 10(exp -3)

Correction of the definition of mass-flow parameter in dynamic inflow modelling

No abstract available

Integrating Wind Power in Electricity Grids: An Economic Analysis

As a renewable energy source, wind power is gaining popularity as a favoured alternative to fossil fuel, nuclear and hydro power generation. In Europe, countries are required to achieve 15% of their energy consumption from wind by 2010 as the EU strives to meet its Kyoto obligations. Wind power is considered to be environmentally friendly and low cost. While environmental friendliness has come under scrutiny because wind turbines continue to pose a hazard to birds, are visually unappealing, affect the uses of land and change air flows, the purpose of this paper is to examine the question of its presumed low cost and effectiveness atreducing CO2 emissions by replacing power generated from fossil fuels. To do so, we develop a mathematical programming model of an electrical energy grid that employs power generated by a base-load nuclear power plant, a coal-fired power plant and a gas facility, with the latter used primarily to meet peak-load demand. We then introduce varying levels of wind power generating capacity into the grid. The results indicate that, at low levels of penetration, wind power can provide CO2 mitigation benefits at low cost. However, as the degree of penetrability increases, the costs of reducing CO2 emissions rise rapidly because of the spinning reserves required in the coal- and gas-fired power plants. Fossil fuels are consumed even though no power is generated in the eventuality that wind power is suddenly unavailable. The whimsical nature of wind energy makes it a less than desirable long-term source of energy.renewable energy, wind and nuclear power, economics of power generation

Reply to the comment by Carmelo Anile on the paper "Complexity analysis of the cerebrospinal fluid pulse waveform during infusion studies"

Veterinary technology is an emerging profession within the veterinary and allied animal health fields in Australia and affords graduates the opportunity to contribute to the small but growing body of literature within this discipline. This study describes the introduction of a contextualised assessment task to develop students’ research capability, competence and confidence in professional writing, and to engage them with the academic publishing process. Students worked in self-selected dyads to author a scientific case report, of publishable standard, based on authentic cases from their clinical practicum. Intrinsic to the task, students attended a series of workshops that explored topics such as critiquing the literature, professional writing styles and oral presentation skills. Assessment was multi-staged with progressive feedback, including peer review, and culminated with students presenting their abstracts at a mock conference. Students reported the task to be an enjoyable and valuable learning experience which improved their competence and confidence in scientific writing; supported by a comparison of previously submitted work. Linking scientific writing skills to clinical practice experiences enhanced learning outcomes and may foster the professionalisation of students within this emerging discipline

Music in early education and care settings for communication and language support

Musical activities are often an integral part of the home life of young children and their caregivers. Activities include songs and rhymes that coordinate the daily routine, as well as opportunities for learning and engagement in a wider world. Music groups for caregivers and young children are also included within programmes of activities for families in early education and care settings. Additionally, such settings may have specific targets and outcomes that seek to improve the life chances of young children in disadvantaged circumstances; one key target may be the development of young children’s communication skills. There is the suggestion, based on evidence from large-scale studies, that young children from disadvantaged backgrounds lag behind their more advantaged peers in language skills. Music can help children develop language and the associated skills necessary to be ready for school. In the early education and care setting context, it can be seen that music group sessions may serve various non-music targets and outcomes. This chapter overviews the evidence that appropriate musical activities are beneficial to learning and language development, challenging a view that words are the best starting point for communication. It seeks to offer a model of an effective musical pedagogical approach, developed through action research with an interdisciplinary team of early childhood music-arts practitioners and speech and language therapists for caregivers and young children in early care settings. The chapter aids reflection on children’s emerging communication through musical activities, as well as some practical ideas for working with children with communication difficulties. Finally, the main findings from two projects are presented as practical implications, seeking to contribute new knowledge about working with children and their caregivers through music in early education and care settings

Frame synchronization performance and analysis

The analysis used to generate the theoretical models showing the performance of the frame synchronizer is described for various frame lengths and marker lengths at various signal to noise ratios and bit error tolerances