98,154 research outputs found
Lightning impulse tests on air-breakdown level in point-plane electrode configuration
In the past several decades, extensive amount of research work has been done to
understand the fundamental characteristics of the electrical breakdown. Breakdown
voltage is a phenomenon where the quantity of an electrical force is required to
transform the electrical properties of an object. Many factors that lead to the
breakdown voltage are still not fully discovered. These factors are including the
physical parameters of the electrodes (sphere, plane, point etc.) and also the
environmental conditions. In electrical power system, high voltage (HV) power
equipment is mainly subjected with spark over voltage. In this study, point electrode
and plane electrode have been used for the experimental study of the short air gap.
The electrodes are vertically aligned. In order to simulate the performance
characteristic of the air breakdown voltage and maximum electric field between the
conducting point and plane electrodes, the electrodes is taken into considered in this
work using FEMM simulation. The air breakdown voltages between the electrodes
(point and plane) are measured by conducting the air breakdown voltage experiment
in high voltage laboratory and corresponding electrical field strength. The electrodes
gap distances are being varied to 5 different gaps which are 5mm, 10mm, 15mm,
20mm and 25mm. In order to achieve maximum strength in such a field, the point of
the highest stress is controlled. From the experiment, it was established that the point
at the electrode that produces maximum electric field is at the point with the smallest
area or width. As for point electrode, the smallest area is at the angle of the electrode.
Besides, it shows that the electrical breakdown characteristic is affected by the
strength of the impulse voltage. Higher gap distance between the electrodes will
result higher breakdown-impulse voltage while higher breakdown-impulse voltage
will produce higher field intensity
Smart distribution board overload detector by using microcontroller
A statistic by Economic Planning Unit (EPU) on the electricity growth in Malaysia has shown an increment in line with economic growth [1]. In line with government policies, the energy supply industry has been molding itself to cater to the rapid development of the nation in hopes of creating a better and smarter nation [2]. There are many developments and implementation of smart energy consumption to save energy and cater to future energy challenges
BlogForever D5.2: Implementation of Case Studies
This document presents the internal and external testing results for the BlogForever case studies. The evaluation of the BlogForever implementation process is tabulated under the most relevant themes and aspects obtained within the testing processes. The case studies provide relevant feedback for the sustainability of the platform in terms of potential users’ needs and relevant information on the possible long term impact
Space-centred information management approach to improve CAD-based healthcare building design
This study focuses on developing a space-centred CAD tool to enable designers to effectively
manage and implement the information of design guidance information and user requirements during design
processes, especially for the stages of design briefing and conceptual design. It aims to structure and store
design guidance and user requirements for healthcare building design into a relational database, and link them
to relevant space entities in design plans. The tool is developed on the platform of Autodesk Architecture
Desktop (ADT). It also enables users to store and retrieve pictures associated with textual information, because
pictures have been always used by designers as an effective medium to represent and deliver design information
and knowledge. This can give users directly visual and more understandable perceptions of the design guidance.
The tool is fully embedded with Autodesk AutoCAD systems to ensure the application of this tool being fully
merged with CAD-based design process. A set of design guidance about Alzheimer clinic built environments are
adopted as a sample to demonstrate and validate the tool. Moreover, the scenario of expanding this application
to more broad areas has also been foreseen
An application generator for rapid prototyping of Ada real-time control software
The need to increase engineering productivity and decrease software life cycle costs in real-time system development establishes a motivation for a method of rapid prototyping. The design by iterative rapid prototyping technique is described. A tool which facilitates such a design methodology for the generation of embedded control software is described
Technical Requirements Analysis and Control Systems (TRACS) Initial Operating Capability (IOC) documentation
The Technical Requirements Analysis and Control Systems (TRACS) software package is described. TRACS offers supplemental tools for the analysis, control, and interchange of project requirements. This package provides the fundamental capability to analyze and control requirements, serves a focal point for project requirements, and integrates a system that supports efficient and consistent operations. TRACS uses relational data base technology (ORACLE) in a stand alone or in a distributed environment that can be used to coordinate the activities required to support a project through its entire life cycle. TRACS uses a set of keyword and mouse driven screens (HyperCard) which imposes adherence through a controlled user interface. The user interface provides an interactive capability to interrogate the data base and to display or print project requirement information. TRACS has a limited report capability, but can be extended with PostScript conventions
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The P3 platform: an approach and software system for developing diagrammatic model-based methods in design research
Many issues in design and design management have been explored by building models which capture the relationships between different aspects of the problem at hand. These models require computer support to construct and analyse. However, appropriate modelling tools can be time-consuming to develop in a research environment. Reflecting upon five design research projects, this paper proposes that such projects can be facilitated by recognising the iterative and tightly-coupled nature of research and tool development, and by attempting to minimise the effort of solution prototyping within this process. Our approach is enabled by a software platform which can be rapidly configured to implement many conceivable modelling approaches. This configurability is complemented by an emerging library of modelling and analysis approaches tailored to explore design process systems. The platform-based approach enables any mix of modelling concepts to be easily created. We propose it could thus help researchers to explore a wide range of questions without being constrained to existing conventions for modelling – or for model integration
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