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On the Innovation and Development of Embedded Systems from the Perspective of Environmental Science and Technology Aesthetics
Issue:
Volume 1, Issue 4, October 2013
Pages:
68-72
Received:
4 August 2013
Published:
10 September 2013
Abstract: The environmental science and technology aesthetics is a new interdisciplinary application aesthetic subject, which arises with the inspiration of contemporary ecological concepts, environmental ideas, and aesthetic thoughts. It is based on the theories of ecological ontology, ecological ethics and ecological value, and it is the perfect combination of science and technology and environmental aesthetics, and it is the science of the general laws in which science and technology are studied, innovated and developed in accordance with the principles of environmental aesthetics. The embedded system is a "dedicated computer system embedded in the object system", and it is technology-intensive, investment-intensive, highly decentralized and continuously innovative knowledge-intensive system. The embedded system innovation has the close and indivisible relationship with the environmental science and technology aesthetics: The environmental science and technology aesthetics is instructive to the embedded system innovation; while the embedded system innovation is concrete practice and application of the environmental science and technology aesthetics theory. The environmental science and technology aesthetics has got rid of the Western traditional dualistic and opposing thinking mode, surpassed the modern tool reason and anthropocentrism, and promoted the environmental development of embedded system. The environmental science and technology aesthetics is the important theoretical resource that guides the environmental development of embedded system, and an important guarantee that makes the embedded system develop and innovate along healthy, scientific, environmental road. The environmental embedded system must have broad development prospects.
Abstract: The environmental science and technology aesthetics is a new interdisciplinary application aesthetic subject, which arises with the inspiration of contemporary ecological concepts, environmental ideas, and aesthetic thoughts. It is based on the theories of ecological ontology, ecological ethics and ecological value, and it is the perfect combinatio...
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Investigating the Effect of Increased Heatsink Temperature and Packaging-Induced Strain in a Single Emitter Laser Using a Laser Diode Simulation/Emulation Tool
Christian Kwaku Amuzuvi,
Fuseini Mumuni
Issue:
Volume 1, Issue 4, October 2013
Pages:
73-78
Received:
2 September 2013
Published:
30 September 2013
Abstract: This paper explores further the capability and versatility of Barlase in establishing deeper understanding of the behaviour of an emitter in a laser bar. The interactions between an emitter and the substrate upon which it is mounted are important in learning more about the degradation process that occurs in lasers. It is well known that various factors come into play in the operation of individual emitters and full laser bars (L-I characteristics, threshold, efficiency, etc.) but one of the most important is the effect of increased heatsink temperature and packaging-induced strain in laser bars. Barlase is therefore used to investigate these effects based on the Arrhenius equation. The relevant parameters are updated at each aging step. Barlase allows a better understanding of how current competition, temperature and the level of defects affect the output power and the degradation rate of a bar.
Abstract: This paper explores further the capability and versatility of Barlase in establishing deeper understanding of the behaviour of an emitter in a laser bar. The interactions between an emitter and the substrate upon which it is mounted are important in learning more about the degradation process that occurs in lasers. It is well known that various fac...
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A New Technique to Improve AC Coil Contactor Switching in Presence of Voltage Sags
Sonali Mayuresh Akolkar,
Bansidhar Eknath Kushare
Issue:
Volume 1, Issue 4, October 2013
Pages:
79-84
Received:
20 August 2013
Published:
30 September 2013
Abstract: Total complaints related to voltage sags are about 80 % of all the complaints due to power quality transients. AC Contactors are designed to disconnect the load or circuit they control when the main power supply is intentionally interrupted. The sensitivity of AC coil contactors to the applied voltage is thus a potentially weak link in industrial processes. This paper shows the test results obtained from extensive laboratory testing carried out on AC coil contactors to voltage sags with variation in value of point on wave angle of voltage sags. The testing was carried out considering various sag magnitudes, durations and point on wave initiation angles of supply voltage waveform. Voltage tolerance curves for AC contactor have been plotted which gives an idea about equipment malfunction for different sag events. This kind of typical equipment sensitivity data might be useful for the future sag assessment methods. Line to line transformer is also suggested for improving AC coil contactor behavior during voltage sags
Abstract: Total complaints related to voltage sags are about 80 % of all the complaints due to power quality transients. AC Contactors are designed to disconnect the load or circuit they control when the main power supply is intentionally interrupted. The sensitivity of AC coil contactors to the applied voltage is thus a potentially weak link in industrial p...
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Review Article Regarding Possibilities for Speed Adjustment at Reluctance Synchronous Motors
Monica Adela Enache,
Sorin Enache,
Ion Vlad
Issue:
Volume 1, Issue 4, October 2013
Pages:
85-89
Received:
12 July 2013
Published:
20 October 2013
Abstract: This paper presents some conclusions of a larger review article which regards possibilities for speed adjustment at synchronous reluctance motors. In the first part there are detailed the command variants by modifying the supply voltage and frequency (open loop control and vectorial control). There are reviewed the variants with and without position sensors. In the second part there is presented the possibility for speed modification by changing the poles number. There is presented a constructive variant of rotor for a reluctance synchronous machine with changing number of poles. The paper ends with conclusions corresponding to the study achieved.
Abstract: This paper presents some conclusions of a larger review article which regards possibilities for speed adjustment at synchronous reluctance motors. In the first part there are detailed the command variants by modifying the supply voltage and frequency (open loop control and vectorial control). There are reviewed the variants with and without positio...
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Power Quality Analysis in a Distribution Network of a Quarry Processing Plant
Joseph Cudjoe Attachie,
Christian Kwaku Amuzuvi
Issue:
Volume 1, Issue 4, October 2013
Pages:
90-94
Received:
21 August 2013
Published:
10 November 2013
Abstract: Power quality problems encompass a wide range of different phenomena. Each of these phenomena may have a variety of different causes and different solutions that can be used to improve upon the power quality and equipment performance. This paper analyses the malfunctioning of a capacitor bank at a quarry processing company (QPC) in the Western Region of Ghana. The QPC had held the Electricity Company of Ghana (ECG) responsible for the damage. According to QPC, the damage was due to frequent power fluctuations and outages experienced from the ECG distribution network. The paper presents and discusses techniques used to investigate the cause of the problem. The result of the analysis of the damage was conducted using the electromagnetic transient programme (EMTP) and relates the damage to harmonic resonance produced from the QPC power distribution network. It is recommended that, for reliable, safe and economic operation of capacitor banks, the harmonic content of an electrical installation is measured and analyzed before installation.
Abstract: Power quality problems encompass a wide range of different phenomena. Each of these phenomena may have a variety of different causes and different solutions that can be used to improve upon the power quality and equipment performance. This paper analyses the malfunctioning of a capacitor bank at a quarry processing company (QPC) in the Western Regi...
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Energy Efficient Lighting System in Gaza Strip Buildings
Hatem Elaydi,
Zaki Al Qaraa
Issue:
Volume 1, Issue 4, October 2013
Pages:
95-100
Received:
8 October 2013
Published:
20 November 2013
Abstract: This study aimed at identifying design features that can be incorporated in buildings to make them energy efficient. Energy audit and analysis is necessary to increase building energy efficiency. Three methods to increase energy efficiency were selected based on installation cost: the first method of low cost is replacing T-8 fluorescent lamps (FL) and Metal Halide lamps (ML) with T-5 and High Pressure Sodium (HPS) respectively, the second method of medium cost is replacing all FL and ML lamp with Light Emitting Diode (LED), the third method of high cost is the automation system for room lighting based on fuzzy logic controller at some places in the building. Energy audit and analysis was performed on Irada building at Islamic University of Gaza (IUG). Good energy saving were achieved using low cost, medium cost, and high cost methods. Finally, this provided much needed saved power to be reused in Gaza Strip.
Abstract: This study aimed at identifying design features that can be incorporated in buildings to make them energy efficient. Energy audit and analysis is necessary to increase building energy efficiency. Three methods to increase energy efficiency were selected based on installation cost: the first method of low cost is replacing T-8 fluorescent lamps (FL...
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Objective Image Quality Evaluation Model for JPEG2000 Coded Images Based on Edge Information Measures
Z. M. Parvez Sazzad,
Rayeen Sultana,
Hajera Siddiqa,
Manika Rani Dey
Issue:
Volume 1, Issue 4, October 2013
Pages:
101-106
Received:
8 September 2013
Published:
20 November 2013
Abstract: In this paper, a no-reference objective quality assessment model is proposed for JPEG2000 coded images. It is well established that human visual system is very sensitive to edge information; consequently we believe that perceptual artifacts of any image are strongly dependent on local features such as edge and non-edge areas. Therefore edge and non-edge area based distortions are evaluated in this model. Performance of the model is evaluated by using the subjective experiment results of the LIVE Texas’s database. The performance is also compared with other existing methods and the result is inevitably sufficient.
Abstract: In this paper, a no-reference objective quality assessment model is proposed for JPEG2000 coded images. It is well established that human visual system is very sensitive to edge information; consequently we believe that perceptual artifacts of any image are strongly dependent on local features such as edge and non-edge areas. Therefore edge and non...
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