Параметрическая модель узла нагрузки с нелинейными электроприемниками

Математическое моделирование качества электрической энергии, основанное на использовании метода гармонического баланса, требует применения соответствующих математических моделей узлов нагрузки, учитывающих их нелинейные и частотные свойства. Предложен подход к построению таких моделей, на основе имеющихся экспериментальных данных разработан алгоритм определения параметров моделей. Проведены расчеты применительно к одному из узлов нагрузки, обладающему такими свойствами

Overcoming the adversity of diversity : an Australian story

The low participation rate of women in computing education and the computing industry is a phenomenon that has been recognised by many western countries. While much has been written on the underlying reasons for the low participation in such a growing and dynamic industry, the situation only seems to be worsening. This paper examines briefly a number of approaches taken by researchers in Australia to try and address the problem. One tertiary institution, Victoria University, has undertaken over a ten year period a sequence of projects, aimed at encouraging and supportingfemale students to study information technology and then make a successful transition from university to the workplace. The strategies and outcomes of the most recent project is the focus of this paper. This project concentrated on equipping graduatingfemale students with skills and knowledge to enable them to participate on equal terms with their male counterparts in workgroups and project teams. An outcome from this work was the preparation and distribution of a resource book to graduating female students during 2002.<br /

Electronic Commerce Benefits, Challenges and Success Factors in the Australian Banking and Finance Industry

This paper reports on part of a wider study into electronic commerce (e-commerce) benefits, challenges and success factors in Australian businesses, with particular reference to the banking and finance industry. The findings indicate that the major benefits to this industry sector from adoption of e-commerce are increased sales, business efficiency, competitive advantage, increased automation of processes and retained and increased customer base. The key challenges identified for the sector include the costs of the technology, lack of e-commerce knowledge, budgeting, acquiring IT skilled people and customer service. Secure transactions were not considered a major challenge by this sector; rather they were regarded as one of the success factors, along with support from top management, a functional and user-friendly web site, partnerships with technology providers and an effective project leader. Participating companies correctly estimated the majority of challenges posed by the adoption of e-commerce, however they did not anticipate the difficulties of acquiring skilled staff to design, implement and manage the IT aspects of the transition

Modus Vivendi of E-Business

This paper reports on an investigation into relationships between challenges and success factors in e-business, from the perspective of the acknowledged benefits achieved by large organizations operating within the Australian context. To enable organisations to achieve benefits from e-business, it is imperative for companies to recognise challenges before them as well as to identify critical success factors necessary for their success. The outcome of the research reported in this paper is a key set of critical success factors, challenges and benefits that can be used as a modus vivendi to overcome problems by applying appropriate solutions in order to achieve benefits in this area

Analytical methods in wineries: is it time to change?

A review of the methods for the most common parameters determined in wine—namely, ethanol, sulfur dioxide, reducing sugars, polyphenols, organic acids, total and volatile acidity, iron, soluble solids, pH, and color—reported in the last 10 years is presented here. The definition of the given parameter, official and usual methods in wineries appear at the beginning of each section, followed by the methods reported in the last decade divided into discontinuous and continuous methods, the latter also are grouped in nonchromatographic and chromatographic methods because of the typical characteristics of each subgroup. A critical comparison between continuous and discontinuous methods for the given parameter ends each section. Tables summarizing the features of the methods and a conclusions section may help users to select the most appropriate method and also to know the state-of-the-art of analytical methods in this area

Em busca de marcadores sensoriais por entre a composição do vinho tinto: um estudo nacional inovador

The objective of this work was to verify the signaling/profiling potential of wine compounds and the physicochemical and bioclimatic winerelated measurements on a nationwide sensory scale of red wine typicality. Color tonality evolved from violet-purple in cooler northern regions to ruby-garnet in hotter southern regions. Acidity and astringency were enhanced from south to north. Conversely, alcohol and viscosity progressed southward. Bitterness was primarily affected by inland-coastal influence. The regional differentiation of astringency and bitterness introduced an orthogonal reading (N north- S south vs. E inland-W coastal, respectively), rather than a linear one, these findings adding novelty to sensory research. Additionally, several Portuguese-related studies were reviewed, and their findings were correlated with six sensory measures. Bioclimatic indexes, pH and the total phenol index were considered the strongest profilers in a nationwide assessment on red wine typicality. The ratio of the oligomeric/polymeric composition of tannins, as well as total anthocyanins, was also to be considered to be a valid sensory profiler. Several nationwide tendencies and correlations between sensory evaluations and wine chemistry may represent interesting findings and challenge unexplored ways for new researc