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Articles 1 - 7 of 7
Full-Text Articles in Engineering
Implementing Test Patterns To Dynamically Assess Internet Response For Potential Voip Sessions Between Sip Peers, Declan Barber
Implementing Test Patterns To Dynamically Assess Internet Response For Potential Voip Sessions Between Sip Peers, Declan Barber
The ITB Journal
The capability of VoIP to provide internet telephony is limited by the lack of homogeneous quality of service (QoS) mechanisms in the Internet. Whereas approaches which reserve QoS resources will work well in an end-to-end managed environment, they are not automatically suited to the heterogeneous nature of the Internet. It may be possible to adopt the 'chirp-sounder' approach uses in establishing the optimal frequency channel for a high frequency (HF) radio transmission which dynamically samples a range of possible transmission channels and uses the echoing of a an established test pattern to ascertain the quality of the potential links. The …
Investigation Into The Correct Statistical Distribution For Oxide Breakdown Versus The Oxide Thickness Used In Integrated Circuit Manufacture, James Prendergast, Eoin O'Driscoll, Ed Mullen
Investigation Into The Correct Statistical Distribution For Oxide Breakdown Versus The Oxide Thickness Used In Integrated Circuit Manufacture, James Prendergast, Eoin O'Driscoll, Ed Mullen
The ITB Journal
A critical aspect of integrated circuit manufacturing is the reliability of the components, in particular the gate oxide of transistors and capacitors. Accelerated stress tests are used for reliability predictions of gate oxides. There are two statistical distributions, which can be applied to stress test failure data, namely the Lognormal or the Weibull distributions. The failure data can fit each distribution equally well. However the use of either distribution will give vastly different lifetime predictions and their correct use is crucial for accurate lifetime prediction. A statistical based test, developed with Monte Carlo data, which is designed to decide if …
Soc Test: Trends And Recent Standards, Michael Higgins, Ciaran Macnamee
Soc Test: Trends And Recent Standards, Michael Higgins, Ciaran Macnamee
The ITB Journal
The well-known approaching test cost crisis, where semiconductor test costs begin to approach or exceed manufacturing costs has led test engineers to apply new solutions to the problem of testing System-On-Chip (SoC) designs containing multiple IP (Intellectual Property) cores. While it is not yet possible to apply generic test architectures to an IP core within a SoC, the emergence of a number of similar approaches, and the release of new industry standards, such as IEEE 1500 and IEEE 1450.6, may begin to change this situation. This paper looks at these standards and at some techniques currently used by SoC test …
Ray Tracing Technique For The Optimal Design Of An Air Heater Concentrating Collector, Fernando Guerreiro
Ray Tracing Technique For The Optimal Design Of An Air Heater Concentrating Collector, Fernando Guerreiro
Student Journal of Energy Research
There is a wide range of micro and macro renewable and sustainable energy methods available for reducing the inefficient use of fossil fuels, minimising carbon emissions and maximising energy use in a clean and environment-friendly process. Solar energy plays an important role due to its abundance and ubiquity. Solar air heaters convert solar energy into hot air to be used for heating and drying of various products. The objective of this paper is to define and optimise the geometry of an inverted absorber compound parabolic concentrating (IACPC) collector for air heating. This optimisation was developed based on an optical analysis …
Short Term Demand Forecasting For The Integrated Electricity Market, Katie Kavanagh
Short Term Demand Forecasting For The Integrated Electricity Market, Katie Kavanagh
Student Journal of Energy Research
This paper presents a means for the short term load forecasting (STLF) of electricity. The forthcoming Integrated-Single Electricity Market (I-SEM) diverges from the current market structure (the Single Electricity Market or SEM), with significant impacts on Irish supply companies, creating a need for these companies to be able to accurately forecast their customers’ load in the Day Ahead. Using a Double Seasonal Exponential Smoothing variation of the Holt-Winters method that factors in an error correction, data from the Irish market was trained and used to forecast a supply company’s demand resulting in an average daily MAPE (Mean Absolute Percentage Error) …
Extending Physical Simulation To The Audio Domain, Graham Mccann, Hugh Mccabe
Extending Physical Simulation To The Audio Domain, Graham Mccann, Hugh Mccabe
The ITB Journal
Using physical simulation to control movement and interactions between objects in a 3D environment, such as a computer game, has become increasingly common However; this idea has not been extended in a general sense to the audio domain. The audio component of these systems usually comprises of pre-recorded WAV files that are triggered in response to events. We argue that this approach has serious limitations and propose instead that the physical information made available by physics engines provides an opportunity to carry out synthesis of appropriate sounds from scratch. We outline a framework for adding a sound synthesis module to …
Fuzzy Logic And Neural Networks - A Glimpse Of The Future, Raymond Manley
Fuzzy Logic And Neural Networks - A Glimpse Of The Future, Raymond Manley
The ITB Journal
In 1965 Lofti Zadeh published his paper on fuzzy set theory , putting it forward as a way of more closely realising the human thought process. Many systems developed to aid human activities have been based on definitive , yes/no, type decision making processes. An example is the way all computers are based on the binary logic system where only two possible and separate logic levels are allowed, a logic 1 or logic 0. However, we know from everyday experience that humans think in terms of vague linguistic categories, for example, the weather is fairly good today. "Fairly good" represents …