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Articles 1 - 17 of 17
Full-Text Articles in Physical Sciences and Mathematics
New N-Nitrosodimethylamine (Ndma) Precursors That React With Ozone: Implications For Water Reuse, Erica Marti, Aleks Pisarenko, Eric Dickenson
New N-Nitrosodimethylamine (Ndma) Precursors That React With Ozone: Implications For Water Reuse, Erica Marti, Aleks Pisarenko, Eric Dickenson
College of Engineering: Graduate Celebration Programs
Ozonation is a promising treatment step for water reuse. Compared to the “gold standard” with reverse osmosis and advanced oxidation, ozone requires less energy and does not result in a waste brine. This makes ozone more cost-effective. However, the formation of nitrosamines may be a significant barrier to the use of ozonation in water reuse applications, particularly for potable reuse.
Solar Cell Design Using Metamaterials, Yang Liu, Yitung Chen, Jichun Li
Solar Cell Design Using Metamaterials, Yang Liu, Yitung Chen, Jichun Li
College of Engineering: Graduate Celebration Programs
Natural structure with simultaneous negative permittivity and permeability has not been discovered yet. However, using specially-designed metal embedded in dielectric bodies can achieve a kind of artificial negative index. This periodic structure which is smaller than the guided wavelength is known as a metamaterial. However, recent designs of metamaterials have some disadvantages when they are used in the application of solar cell. The perfect absorption is only within a narrow band, and for most of the solar spectrum, the absorption is no more than 10%. Here, a new kind of absorber for the solar spectrum has been designed and analyzed, …
Applied Analysis Of Ionic Polymer Metal-Composite Actuators, Siul Ruiz, Benjamin Mead, Woosoon Yim
Applied Analysis Of Ionic Polymer Metal-Composite Actuators, Siul Ruiz, Benjamin Mead, Woosoon Yim
College of Engineering: Graduate Celebration Programs
- IPMC is a type of smart material called an electroactive polymer
- Consists of an ionic polymer such as Nafion or Flemion and a conducive metal such as platinum or gold
- COMSOL multi-physics simulations accurately model the experimental displacement results
- Optimization performed using the multi-physics model to find the maximum deflection, force, and twisting
- Using the closed loop control system accurate IPMC tip location can be achieved
- This control system has been extended to function using a computer mouse as an input
Modeling And Architectural Simulations Of The Statistical Static Timing Analysis Of The Variation Sources For Vlsi Circuits, Abu M. Baker
Modeling And Architectural Simulations Of The Statistical Static Timing Analysis Of The Variation Sources For Vlsi Circuits, Abu M. Baker
College of Engineering: Graduate Celebration Programs
As CMOS technology scales down, process variation introduces significant uncertainty in power and performance to VLSI circuits and significantly affects their reliability. Although Static-Timing Analysis (STA) remains an excellent tool, current trends in process scaling have imposed significant difficulties to STA. As one of the promising solutions, Statistical static timing analysis (SSTA) has become the frontier research topic in recent years in combating such variation effects. This poster will be focusing on two aspects of SSTA and its applications in VLSI designs: (1) Statistical timing modeling and analysis; and (2) Architectural implementations of the atomic operations (max and add) using …
On High-Performance Parallel Decimal Fixed-Point Multiplier Designs, Ming Zhu
On High-Performance Parallel Decimal Fixed-Point Multiplier Designs, Ming Zhu
College of Engineering: Graduate Celebration Programs
Decimal computations are required in finance, and etc.
- Precise representation for decimals (E.g. 0.2, 0.7… )
- Performance Requirements (Software simulations are very slow)
A Computation Model For Nanoantenna-Based Solar Cell With High Conversion Efficiency, Yiyan Li, Ke-Xun Sun, Yingtao Jiang
A Computation Model For Nanoantenna-Based Solar Cell With High Conversion Efficiency, Yiyan Li, Ke-Xun Sun, Yingtao Jiang
College of Engineering: Graduate Celebration Programs
- Build a model of spiral nanoantenna and an antenna
array based solar cell collector. - Using Rao-Wilton-Glisson (RWG) basis functions to
simulate the spiral nanoantennas. - We calculate the frequency response of the radiation
gain as the indicator of receiving bandwidth which is a
key factor in conversion efficiency.
Mono-Sized Sphere Packing Algorithm Development Using Optimized Monte Carlo Technique, Karn Soontrapa, Yitung Chen
Mono-Sized Sphere Packing Algorithm Development Using Optimized Monte Carlo Technique, Karn Soontrapa, Yitung Chen
College of Engineering: Graduate Celebration Programs
In this research, fuel cell catalyst layer was developed using the optimized sphere packing algorithm. An optimization technique named adaptive random search technique (ARSET) was employed in this packing algorithm. The ARSET algorithm will generate the initial location of spheres and allow them to move in the random direction with the variable moving distance, randomly selected from the sampling range (a), based on the Lennard–Jones potential and Morse potential of the current and new configuration. The solid fraction values obtained from this developed algorithm are in the range of 0.610–0.624 while the actual processing time can significantly be reduced by …
Buffering Pv Output During Cloud Transients With Energy Storage, Yacouba Moumouni
Buffering Pv Output During Cloud Transients With Energy Storage, Yacouba Moumouni
College of Engineering: Graduate Celebration Programs
The Problem
• Photovoltaic output power can be affected by many factors including clouds passing overhead.
• Utilities in generally prefer a guaranteed power delivery level over some specified power delivery period.
• Power delivered during peak demand hours is generally more valued by utilities. For the Desert Southwest this is in the summertime afternoons. For the local area this will be defined as 1-5 pm for the three summer months.
• While battery power can be adapted to this problem, large batteries to be expensive.
Solar Cell Design Using Metamaterials, Yang Liu, Yitung Chen, Jichun Li
Solar Cell Design Using Metamaterials, Yang Liu, Yitung Chen, Jichun Li
College of Engineering: Graduate Celebration Programs
Natural structure with simultaneous negative permittivity and permeability has not been discovered yet. However, using specially-designed metal embedded in dielectric bodies can achieve a kind of artificial negative index. This periodic structure which is smaller than the guided wavelength is known as a metamaterial. However, recent designs of metamaterials have some disadvantages when they are used in the application of solar cell. The perfect absorption is only within a narrow band, and for most of the solar spectrum, the absorption is no more than 10%. Here, a new kind of absorber for the solar spectrum has been designed and analyzed, …
Traffic Counter Mobile Application, Victor Molano
Traffic Counter Mobile Application, Victor Molano
College of Engineering: Graduate Celebration Programs
INTRODUCTION
Manual Counters:
•The vehicles counts and characteristics at signalized intersections and others transportation facilities are usually made using manual counters. These manual counters are mechanical or digital boards in which the user can record the different observations from the field. The use of these devices is usually required when more sophisticated methods are not available, when expensive equipment is not justified and for scholastic practices.
Node Filtering And Face Routing For Sensor Network, Umang Amatya
Node Filtering And Face Routing For Sensor Network, Umang Amatya
College of Engineering: Graduate Celebration Programs
Main Contributions
•Efficient Algorithms for identifying Redundant Sensor Nodes
•New Technique for Filtering Redundant Nodes in Sensor Network
•Reliable Algorithm for Message Routing - Forwarding
•User Friendly Prototype Implementation in Java
•Results of Experimental Investigation
Architecture For An Interactive Motion-Based Traffic Simulation Environment, Romesh Khaddar, Naveen Veeramisti, Alexander Paz, Pushkin Kachroo
Architecture For An Interactive Motion-Based Traffic Simulation Environment, Romesh Khaddar, Naveen Veeramisti, Alexander Paz, Pushkin Kachroo
College of Engineering: Graduate Celebration Programs
In simple words, the objective of this research is to identify the effect of human behavior on traffic To enhance the traffic simulation modeling realism by involving actual human beings navigating the system along with simulated entities in an immersive environment
Real-Time Face Detection And Recognition, Parker Hill, Brendan Morris
Real-Time Face Detection And Recognition, Parker Hill, Brendan Morris
College of Engineering: Graduate Celebration Programs
The face has become a popular biometric for identification due to the wide range of features and difficulty in manipulation of the metric. In order to work towards a robust facial recognition system, this work contains a foundation for using the face as a recognition metric. First, faces are detected from still images using a Viola-Jones object detection algorithm. Then, Eigenfaces is applied to the detected faces. The system was tested on face databases as well as real-time feed from a web camera.
Modeling Passive Solar Distillation In Las Vegas, Nv, Noe I. Santos
Modeling Passive Solar Distillation In Las Vegas, Nv, Noe I. Santos
College of Engineering: Graduate Celebration Programs
Project Background
• Many rural areas on the planet do not have easy access to clean water!
• Water distillation basins are capable of distilling water by using incident solar radiation to evaporate polluted water.
• Current thermodynamic models used to predict behavior require instantaneous data; requires the use of expensive equipment.
• Distillation basins are dependent on multiple meteorological variables: insolation, temperature, wind speed, cloud cover.
• Non‐linear behavior is difficult to predict for long term operations.
Framework Developmant For Construction Safety Visialization, Kishor Shrestha
Framework Developmant For Construction Safety Visialization, Kishor Shrestha
College of Engineering: Graduate Celebration Programs
Throughout the history of the construction industry, many fatalities and injuries have occurred in construction sites. One of the major causes of accidents is unsafe site conditions: basically, this is due to inadequate supervision. To improve upon the traditional supervision approach, this study proposes a 'Framework Development for Construction Safety Visualization' approach. In addition to this, a computer vision Edge Detection Algorithm was developed and tested to convert construction site still images into edges of the objects in the images. The framework development of this study uses computer vision, robot vision, image compression, pattern recognition, internet transmission, network communication, and …
Impact Of Sludge Treatment Processes On Estrogen Concentration In Wastewater Sludge, Erica Marti
Impact Of Sludge Treatment Processes On Estrogen Concentration In Wastewater Sludge, Erica Marti
College of Engineering: Graduate Celebration Programs
Endocrine-disrupting compounds (EDCs), such as estrogen, are known to be present in the aquatic environment at concentrations that affect fish and other wildlife. For example, juvenile male fish exposed to estrogen will synthesize vitellogenin, which is a female-specific protein. Estrogen exposure is also linked to sex reversal, intersexuality, and inhibition of gonadal growth (Jobling et al., 1996).
Wastewater treatment plants are major contributors of EDCs into the environment. EDCs end up in wastewater as a result of natural excretion from the body or being washed off the skin. WWTPs are not designed to remove these substances. As a result, EDCs …
College Of Engineering Graduate Celebration 2012 Announcement, University Of Nevada, Las Vegas
College Of Engineering Graduate Celebration 2012 Announcement, University Of Nevada, Las Vegas
College of Engineering: Graduate Celebration Programs
The Howard R. Hughes College of Engineering Graduate Celebration is an event that recognizes the scholarly work of our engineering and computer science graduate students within the college. The target audience includes undergraduate students, graduate students, college faculty and staff, and the campus community as well as local and regional stakeholders. The objective of the event is to promote and publicize the research activities of the College of Engineering and to inform our stakeholders of our students’ achievements.