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Articles 35611 - 35640 of 41153
Full-Text Articles in Entire DC Network
Noise Abatement And Night Deliveries, Hugh Finlay
Noise Abatement And Night Deliveries, Hugh Finlay
Masters
ABSTRACT The hypothesis is tested that – Acoustic materials are available or can be developed and applied to Heavy Goods Vehicles and ancillaries, which effectively and economically abate the noise caused by night deliveries The MPhil is a part of a wider innovation research partnership that aimed to develop sustainable solutions for the growing trend to night deliveries in Dublin city centre. The methodology involves; a review of international best practice for urban traffic noise abatement: a social and commercial justification for developing low noise products and procedures: field trials of kerb-side deliveries to city centre shops to identify the …
A Study And Development Of Temperature And Relative Humidity Control System In Hospital Buildings In Thailand, Thammanoon Sookchaiya, Veerapol Monyakul, Sirichai Thepa
A Study And Development Of Temperature And Relative Humidity Control System In Hospital Buildings In Thailand, Thammanoon Sookchaiya, Veerapol Monyakul, Sirichai Thepa
EDU-COM International Conference
This research was aimed to control thermal environment (temperature and relative humidity) in airconditioned rooms in order to reach thermal comfort and good health for the people in hospital. This research was divided into 2 sections: Section 1 studies the direct and indirect influence of relative humidity on the health of people inside hospital buildings and the appropriate relative humidity and temperature to achieve thermal comfort and good health for Thailand by using Delphi technique; Section 2 develops single phase air conditioning system using inverter to control thermal environment (temperature and relative humidity) inside the room to reach the appropriate …
Microstructured Arrayed Microfluidic Waveguide Structure For Infrared Radiation Focusing And Transfer, Paul B. Laursen, Kamal Alameh, Mikhail Vasiliev, Nicholas C. Elliot
Microstructured Arrayed Microfluidic Waveguide Structure For Infrared Radiation Focusing And Transfer, Paul B. Laursen, Kamal Alameh, Mikhail Vasiliev, Nicholas C. Elliot
ECU Presentations
No abstract provided.
Nanostructured Engineered Materials With High Magneto-Optic Performance For Integrated Photonics Applications, Mikhail Vasiliev, Kamal Alameh, Viacheslav Kotov, Yong-Tak Lee
Nanostructured Engineered Materials With High Magneto-Optic Performance For Integrated Photonics Applications, Mikhail Vasiliev, Kamal Alameh, Viacheslav Kotov, Yong-Tak Lee
ECU Presentations
No abstract provided.
Investigation Of The Visual Aspects Of Business Intelligence, Niall Cunningham
Investigation Of The Visual Aspects Of Business Intelligence, Niall Cunningham
Dissertations
As the need for Irish firms to move into knowledge economy increases knowledge management is being more important. Among its central aims is for knowledge creation and development to enhance knowledge and inspire innovations. One of the ways knowledge management achieves these aims is through the development of knowledge management tools for the firm. Among these tools is the option to use business intelligence to enhance knowledge in the firm by exposing hidden knowledge and building on it. In particular data mining has been highlighted as being effective within business intelligence and knowledge management in discovering hidden knowledge. This dissertation …
Plasma Medicine, Mounir Laroussi, Alexander Fridman
Plasma Medicine, Mounir Laroussi, Alexander Fridman
Electrical & Computer Engineering Faculty Publications
Recent demonstrations of plasma technology in the treatment of living cells, tissues, and organs are creating a newfield at the intersection of plasma science and technology with biology and medicine - Plasma Medicine.
An Efficient Algorithm For Biomarker Identification, Jiang Li, Rick Mckenzie, Lisa Cazares, Richard Drake, John Semmens
An Efficient Algorithm For Biomarker Identification, Jiang Li, Rick Mckenzie, Lisa Cazares, Richard Drake, John Semmens
Electrical & Computer Engineering Faculty Publications
No abstract provided.
Moderately-Rapid Assessment Of Alkaline Desiccation Environmental Systems, David Alan Bates
Moderately-Rapid Assessment Of Alkaline Desiccation Environmental Systems, David Alan Bates
LSU Doctoral Dissertations
A moderately-rapid assessment tool was developed to analyze the waterless desiccation compost toilet investigated in a rural Mexican setting. Over 100 social factors were identified along with the applicable technical factors that influenced the low acceptability of the toilets. A 4-point rating scale was developed to increase the ability and speed of analyzing both the social and technical data. The treatment process was an alkaline-desiccation process with mean pH values of 8.2 ± sd 1.1 and water content of 18.3% ± sd 9.9, which resulted in mean fecal coliform values of 15.0 MPN/g ± sd 31.8, drastically lower than the …
Development Of An Ultrasonic Nde&T Tool For Yield Detection In Steel Structures, Yilmaz Bingol
Development Of An Ultrasonic Nde&T Tool For Yield Detection In Steel Structures, Yilmaz Bingol
LSU Doctoral Dissertations
Nondestructive Evaluation and Testing (NDE&T) is a commonly used and rapidly growing field that offers successful solutions for health assessment of structures. NDE&T methods have gained increasing attention in the last few decades especially with the contribution of the advancements in computer and instrumentation technologies. The applications of numerous NDE&T methods in civil engineering mostly focus on material characterization and defect detection. Techniques for nondestructively identifying the stress state in materials, on the other hand, mostly rely on the Theory of Acoustoelasticity. However, the sensitivity and the accuracy of acoustoelasticity are affected by several factors such as the microstructure of …
Current Transport Modeling Of Carbon Nanotube Field Effect Transistors For Analysis And Design Of Integrated Circuits, Jose Mauricio Marulanda Prado
Current Transport Modeling Of Carbon Nanotube Field Effect Transistors For Analysis And Design Of Integrated Circuits, Jose Mauricio Marulanda Prado
LSU Doctoral Dissertations
The purpose of this study was to develop a complete current transport model for carbon nanotube field effect transistors (CNT-FETs) applicable in the analysis and design of integrated circuits. The model was derived by investigating the electronic structure of carbon nanotubes and using basic laws of electrostatics describing a field effect transistor. We first derived analytical expressions for the carrier concentration in carbon nanotubes for different chiral vectors (n,m) by studying and characterizing their electronic structure. Results showed a strong relation to the diameter and wrapping angle of carbon nanotubes. The charge distribution in a CNT-FET is characterized from the …
Optimization Of Treatment Of Chlorinated Volatile Organic Compound Mixtures In Constructed Wetlands: Vegetation And Substrate Effects, Stephen Emmanuel Mbuligwe
Optimization Of Treatment Of Chlorinated Volatile Organic Compound Mixtures In Constructed Wetlands: Vegetation And Substrate Effects, Stephen Emmanuel Mbuligwe
LSU Doctoral Dissertations
Microcosm and mesocosm scale experiments were carried out to investigate the effects of vegetation and substrates on the performance of engineered wetland systems (EWSs) meant to treat mixtures of volatile organic compounds (cVOCs). The experiments were conducted with a view to optimizing contributions of these wetland components. Phragmites communis and Typha latifolia, the commonest wetland plant species, were compared in mesocosm scale EWSs. Eight common wetland plant species were compared using microcosm experiments based on the potential of their rootmatter to enhance treatment of cVOC mixtures. Twelve common wetland plants were similarly compared but on the basis of their aboveground …
The Use Of Border In Colour 2d Barcode, Siong Ong, Douglas Chai, Keng T. Tan
The Use Of Border In Colour 2d Barcode, Siong Ong, Douglas Chai, Keng T. Tan
Research outputs pre 2011
In recent years, a trend has emerged in the use of colour to increase the data capacity of the 2D barcode. However the decoding of such colour barcode can be challenging in a mobile environment due to blurring effect that is commonly found in images captured by camera mobile phone. Blurring affects the synchronisation between the cells. It also causes the colour value of the cell to be wrongly interpreted. Hence, this paper proposes the use of border to improve the synchronisation and decoding. Three different types of border and the choice of its width will be investigated.
Development Of A Novel Finder Pattern For Effective Color 2d-Barcode Detection, Hiroko Kato, Keng T. Tan, Douglas Chai
Development Of A Novel Finder Pattern For Effective Color 2d-Barcode Detection, Hiroko Kato, Keng T. Tan, Douglas Chai
Research outputs pre 2011
With a camera mobile phone, which has become a "must-have" device, 2D-barcode works as an interface to bridge the physical and digital world. As the notion of ubiquitous computing has permeated, developing a new 2D-barcode and its applications has been a growing trend worldwide. A 2D-barcode symbol consists of two broad areas: data area and guide area. The components of the latter is collectively called "finder pattern" and used in locating the 2D-barcode symbol. The failure of finding the target symbol prevents a barcode reader from successfully decoding the barcode. Hence, designing a functional finder pattern is one of the …
Novel Magnetic Photonic Crystal Structures For Magnetic Field Sensors And Visualizers, Mikhail Vasiliev, Viatcheslav A. Kotov, Kamal E. Alameh, Vladimir I. Belotelov, Anatoly K. Zvezdin
Novel Magnetic Photonic Crystal Structures For Magnetic Field Sensors And Visualizers, Mikhail Vasiliev, Viatcheslav A. Kotov, Kamal E. Alameh, Vladimir I. Belotelov, Anatoly K. Zvezdin
Research outputs pre 2011
Optimized one-dimensional (1-D) magnetophotonic crystals greatly increase the sensitivity of magnetooptical sensors, which are widely used in magnetooptical imaging to observe the magnetic domain patterns in magnetic materials, to observe the vortex states in superconductors, to detect small bits in magnetooptical recording media, to visualize defects in ferromagnetic objects, and to measure the value and spatial distribution of stray magnetic fields. This paper examines the properties of such devices operating in the optimized reflection (doubled Faraday rotation) mode and discusses the use of 1-D magnetophotonic crystals as sensors.
Magnetic Field Sensors And Visualizers Using Magnetic Photonic Crystals, Mikhail Vasiliev, Kamal Alameh, Viatcheslav Kotov
Magnetic Field Sensors And Visualizers Using Magnetic Photonic Crystals, Mikhail Vasiliev, Kamal Alameh, Viatcheslav Kotov
Research outputs pre 2011
Magneto-optical imaging is widely used to observe the domain patterns in magnetic materials, visualize defects in ferromagnetic objects, and measure the spatial distribution of stray magnetic fields. Optimized 1D magneto-photonic crystals enable a significant increase in the sensitivity of magneto-optical sensors. The properties of such devices based on the optimized reflection (doubled Faraday rotation) mode and the use of 1D magnetic photonic crystals as sensors are discussed. Experimental results of the fabrication and characterization of ferrite-garnet layers possessing uniaxial magnetic anisotropy are shown, and an optimized film structure suitable for magneto-optical imaging is proposed.
Photonic Nano-Structures For Water Quality Monitoring, Mikhail Vasiliev, Kamal Alameh
Photonic Nano-Structures For Water Quality Monitoring, Mikhail Vasiliev, Kamal Alameh
Research outputs pre 2011
We propose a new type of sensors suitable for water quality testing and for monitoring water contamination levels in domestic, industrial and environmental applications. The proposed sensing scheme uses Fourier transform cavity-enhanced absorption spectroscopy and novel compact sensing elements based on nanostructured photonic crystal-type optical coatings enabling the sensitive Fourier-domain processing methodology and maximising the absorption path length within the measurement system. The measurement scheme is shown to be suitable for the determination of small changes in the water absorption coefficients at a discrete set of wavelengths in the visible spectral region in response to small concentrations of pollutants with …
Doped Iron Garnet Materials For Magnetic Photonic Crystals, Mikhail Vasiliev, Kamal Alameh, Viatcheslav Kotov
Doped Iron Garnet Materials For Magnetic Photonic Crystals, Mikhail Vasiliev, Kamal Alameh, Viatcheslav Kotov
Research outputs pre 2011
We have established a set of technologies for the deposition and annealing of magneto-optic garnets for use in photonic crystals. Devices for sensing magnetic fields and polarisation control using reconfigurable photonic crystals are being developed.
Microstructured Arrayed Microfluidic Waveguide Structure For Infrared Radiation Focusing And Transfer, Paul B. Laursen, Kamal Alameh, Mikhail Vasiliev, Nicholas C. Elliott
Microstructured Arrayed Microfluidic Waveguide Structure For Infrared Radiation Focusing And Transfer, Paul B. Laursen, Kamal Alameh, Mikhail Vasiliev, Nicholas C. Elliott
Research outputs pre 2011
A microstructured arrayed microfluidic waveguide structure for infrared radiation focussing and transfer is proposed and demonstrated. The arrayed waveguide structure comprises Masterbond UV-curable epoxy UV15 optimised using ZEMAX optical design software to achieve high efficiency of heat capture through far-infrared light focussing and subsequent absorption of the radiation on a centralised fluid medium. A high degree of alignment of the precision-positioned fluidic microchannels with the symmetry axes and the focal plane locations of the cylindrical microlens array is demonstrated, which maximises the efficiency of absorption of the incident IR light energy within the moving fluid. Observation of ink flows through …
Double Boundary Trench Isolation Effects On A Stacked Gradient Homojunction Photodiode Array, Paul V. Jansz, Steven Hinckley
Double Boundary Trench Isolation Effects On A Stacked Gradient Homojunction Photodiode Array, Paul V. Jansz, Steven Hinckley
Research outputs pre 2011
The effect of the width of inter-pixel double boundary trench isolation on the response resolution of a two dimensional CMOS compatible stacked gradient homojunction photodiode array was simulated. Insulation and P-doped double boundary trench isolation were compared. Both geometries showed improved crosstalk suppression and enhanced sensitivity compared to photodiode geometries previously investigated, combined with a reduction in fabrication complexity for the insulation DBTI configuration.
Acousto-Ultrasonic Optical Fiber Sensors: Overview And State-Of-The-Art, Graham Wild, Steven Hinckley
Acousto-Ultrasonic Optical Fiber Sensors: Overview And State-Of-The-Art, Graham Wild, Steven Hinckley
Research outputs pre 2011
This paper gives a review of acoustic and ultrasonic optical fiber sensors (OFSs). The review covers optical fiber sensing methods for detecting dynamic strain signals, including general sound and acoustic signals, high-frequency signals, i.e., ultrasonic/ultrasound, and other signals such as acoustic em
A Micro-Photonic Stationary Optical Delay Line For Fibre Optic Time Domain Oct, Paul V. Jansz, Graham Wild, Steven Hinckley
A Micro-Photonic Stationary Optical Delay Line For Fibre Optic Time Domain Oct, Paul V. Jansz, Graham Wild, Steven Hinckley
Research outputs pre 2011
We present results for the characterisation of a micro-photonic stationary optical delay line. The delay line is intended to generate true time delays for a fibre optic based optical coherence tomography system.
An Intensiometric Detection System For Fibre Bragg Grating Sensors, Graham Wild, Steven Hinckley
An Intensiometric Detection System For Fibre Bragg Grating Sensors, Graham Wild, Steven Hinckley
Research outputs pre 2011
We present an intensiometric detection system for fibre Bragg grating sensors. The system is designed to directly detect intensity modulated signals, or to convert spectrally modulated signals into intensity modulated signals.
Analysis Of Information Remaining On Hand Held Devices For Sale On The Second Hand Market, Andrew Jones, Craig Valli, Iain Sutherland
Analysis Of Information Remaining On Hand Held Devices For Sale On The Second Hand Market, Andrew Jones, Craig Valli, Iain Sutherland
Research outputs pre 2011
The ownership and use of mobile phones, Personal Digital Assistants and other hand held devices is now ubiquitous both for home and business use. The majority of these devices have a high initial cost, a relatively short period before they become obsolescent and a relatively low second hand value. As a result of this, when the devices are replaced, there are indications that they tend to be discarded. As technology has continued to develop, it has led to an increasing diversity in the number and type of devices that are available, and the processing power and the storage capacity of …
Source Localisation In Wireless Sensor Networks Based On Optimised Maximum Likelihood, Mohammed Rahman, Daryoush Habibi, Iftekhar Ahmad
Source Localisation In Wireless Sensor Networks Based On Optimised Maximum Likelihood, Mohammed Rahman, Daryoush Habibi, Iftekhar Ahmad
Research outputs pre 2011
Maximum likelihood (ML) is a popular and effective estimator for a wide range of diverse applications and currently affords the most accurate estimation for source localisation in wireless sensor networks (WSN). ML however has two major shortcomings namely, that it is a biased estimator and is also highly sensitive to parameter perturbations. An Optimisation to ML (OML) algorithm was introduced that minimises the sum-of-squares bias and exhibits superior performance to ML in statistical estimation, particularly with finite datasets. This paper proposes a new model for acoustic source localisation in WSN, based upon the OML estimation process. In addition to the …
An Improved Fec Scheme For Mobile Wireless Communication At Vehicular Speeds, Iftekhar Ahmad, Daryoush Habibi, Ziaur Rahman
An Improved Fec Scheme For Mobile Wireless Communication At Vehicular Speeds, Iftekhar Ahmad, Daryoush Habibi, Ziaur Rahman
Research outputs pre 2011
WiMAX has emerged as a promising wireless communication technology with potential to deliver high throughput and guaranteed quality of service to the end applications. Recent studies suggest that while WiMAX (802.16e) is capable of delivering a data rate of up to 75 Mbps for fixed wireless communications, data rate decreases drastically for mobile wireless communications, often providing a data rate less than 1 Mb/s when the mobile nodes travel at vehicular speeds. High bit error rate caused at high vehicular speeds is the key reason for low throughput. In noisy mobile communication environments, standard error control mechanisms like the transmission …
Performance Evaluation Of Ieee 802.15.4 For Mobile Sensor Network, Kartinah Zen, Daryoush Habibi, Alexander Rassau, Iftekhar Ahmad
Performance Evaluation Of Ieee 802.15.4 For Mobile Sensor Network, Kartinah Zen, Daryoush Habibi, Alexander Rassau, Iftekhar Ahmad
Research outputs pre 2011
The IEEE 802.15.4 standard medium access control (MAC) protocol for low rate wireless personal area networks (LRWPAN) is design mainly for static sensor networks and its capability to support mobile sensor networks has not yet been established. To the best knowledge of authors, this is the first paper that evaluates the suitability of IEEE 802.15.4 MAC in mobile sensor networks environment. We evaluate the performance based on node's speed and beacon order, and observe the effect on energy usage, packet delivery ratio and time required to associate with its coordinator. From the experiment we observe that the moving nodes experienced …
Improving Mobile Sensor Connectivity Time In The Ieee 802.15.4 Networks, Kartinah Zen, Daryoush Habibi, Iftekhar Ahmad
Improving Mobile Sensor Connectivity Time In The Ieee 802.15.4 Networks, Kartinah Zen, Daryoush Habibi, Iftekhar Ahmad
Research outputs pre 2011
In the IEEE 802.15.4 medium access control (MAC) protocol for wireless sensor networks, a sensor node needs to associate with a coordinator before it starts sending or receiving data. The sensor node will mostly choose the nearest coordinator to associate with. However, this method is not suitable for a constantly moving sensor node because it will end up switching coordinators too often due to short connectivity time. The IEEE 802.15.4 has a simplistic and inadequate method of choosing a coordinator in this context. In this paper, we introduce a method to increase the mobile sensor node connectivity time with its …
Converging Voice, Video And Data In Wlan With Qos Support, Hushairi Zen, Daryoush Habibi, Justin Wyatt, Iftekhar Ahmad
Converging Voice, Video And Data In Wlan With Qos Support, Hushairi Zen, Daryoush Habibi, Justin Wyatt, Iftekhar Ahmad
Research outputs pre 2011
Providing quality of service (QoS) for converging traffic in wireless local area network (WLAN) is still a major issue for the researchers and industries. Due to the limited bandwidth and exposure to unpredictable interferences in a wireless environment, efficient management and optimization of the access protocols are essential to provide acceptable QoS for real-time traffic and fairness to best-effort traffic. In this paper, we investigate the throughput and delay performance of the legacy IEEE 802.11 and the 802.11e when carrying converging data in WLAN. We evaluate our recently proposed protocol known as wireless token network protocol (WTN) and show that …
Self-Restraint Admission Control For Ad-Hoc Wlans, Hushairi Zen, Daryoush Habibi, Iftekhar Ahmad
Self-Restraint Admission Control For Ad-Hoc Wlans, Hushairi Zen, Daryoush Habibi, Iftekhar Ahmad
Research outputs pre 2011
Admission control is an important mechanism for sustaining throughput and supporting quality of service (QoS) for real-time traffic in a wireless local area network (WLAN). In an adhoc WLAN scenario where no access point (AP) is available, admission control has to be self-managed by each node. We propose a self-restraining admission control mechanism that works by monitoring the congestion level of the network in the adhoc WLAN. Wireless nodes can listen to all nodes within their range and be aware of the collision rates. A node wishing to join the network measures the current collision rate, and predicts the post-admission …
Novel Broadband Reconfigurable Optical Add-Drop Multiplexer Employing Custom Fiber Arrays And Opto-Vlsi Processors, Feng Xiao, Budi Juswardy, Kamal Alameh, Yong Tak Lee
Novel Broadband Reconfigurable Optical Add-Drop Multiplexer Employing Custom Fiber Arrays And Opto-Vlsi Processors, Feng Xiao, Budi Juswardy, Kamal Alameh, Yong Tak Lee
Research outputs pre 2011
A reconfigurable optical add/drop multiplexer (ROADM) structure based on using a custom-made fiber array and an Opto-VLSI processor is proposed and demonstrated. The fiber array consists of N pairs of angled fibers corresponding to N channels, each of which can independently perform add, drop, and thru functions through a reconfigurable Opto-VLSI beam steerer. Experimental results show that the ROADM structure can attain an average add, drop/thru insertion loss of 5.5 dB and a uniformity of 0.3 dB over a wide bandwidth from 1524 nm to 1576 nm, and a drop/thru crosstalk level as small as -40 dB.