«Strengthening the Nation through Diversity, Innovation & Leadership in STEM San Antonio,Texas · October 3-6, 2013 Get Connected! Connect with the ...»
1 As technology advances, brain networking models become more viable. These models are more desirable because of their parallel nature. However, with the current chip capabilities, the possibilities are limited to the available resources, which run out quickly. Using software instead, combined with the possibility of multiple threading (modern multicore CPUs), we implemented a neural network model to process orientation detection using C++. Biologically, light enters the eye and travels through several layers of cells before reaching the brain. Our software setup collects data from a webcam (eye/photoreceptors) and then passes this data to a 2-dimensional array. Each pixel represents a location in the array (bipolar cells). This array is scanned and transformed into a smaller array (ganglion cells). The new array is scanned for several angles (simple cell) and finally passed into a linear array. This linear array holds all the lines in a specific orientation. These are then summed and expressed as a final amount for each supported angle (complex cell). There are several advantages of working in software such as editability and cost. With the possibility of multiple threading, it is even possible to simulate the parallel tasking performed by the brain, which was the only advantage to the hardware approach.
MULTIAGENT SYSTEM FOR MODELING THE EVACUATION OF AN AMUSEMENT PARK FOLLOWING A
TERRORIST ATTACKBrian Herrera, Antonia Boadi.
California State University, Dominguez Hills, Carson, CA.
This paper proposes a multiagent system for modeling the evacuation of an amusement park after a terrorist attack has occurred. The multiagent system will use the belief-desire-intent model. This system will model how rescue personnel will handle the evacuation of the large number of people who occupy an amusement park. It will model how rescue personnel search for and then triage victims of an attack. It will also model how the personnel communicate with each other so the proper aid will be sent to areas that need it the most. This system can give rescue personnel a visual perspective on how this event could happen and can help plan more efficient rescue operations.
VIRTUAL GEOCACHING: PROMOTING STEM EDUCATION THROUGH A GAMING EXPERIENCEJulian Lopez Sr., Natalia Villanueva-Rosales.
University of Texas at El Paso, El Paso, TX.
The Virtual Geocaching project was initiated to investigate ways to process remote sensing satellite data, VIIRS (Visible Infrared Imaging Radiometer Suite), by creating a prototype science, technology, engineering, and mathematics (STEM) educational application that uses gaming functionality to engage students in learning scientific topics. Virtual Geocaching carries on the tradition of creating an exciting hunt in cyber and data space for clues that lead to a virtual location. The current Virtual Geocaching contains 3 prototype geocaches: Hurricane Sandy – “A Tale of Two Tracks,” Jornada Experimental Site – “High and Dry Near a Grand River,” and Wildfire – “Hot, Dry, and Dead.” We focused on the database backend design and the processing and integration of satellite data as well as any additional data needed for the Geocaching clues, e.g., ground sensor data obtained from the Jornada Long Term Ecological Research site. We developed tools for manipulating VIIRS data given the lack of free and easy-to-use tools for processing this type of remote sensing data. While our focus was limited on the data needed for the 3 geocache prototypes, our future work includes an automated processing interface for VIIRS data and the use of semantic-based approaches for the integration of data. We expect to engage the future generation of scientists by allowing students to explore the earth from a space perspective and navigate large amounts of online data, including satellite data, to understand current scientific challenges.
184 UNDERGRADUATE POSTER ABSTRACTS
WHAT TO LIKE? RECOMMENDING PAGES TO SOCIAL NETWORKING USERSMichael Booker, Adnan Aziz.
University of Texas at Austin, Austin, TX.
In social interactions, people are more likely to befriend others with similar characteristics, personalities, and interests such as movies, celebrities, or hobbies. Successful social networking sites, for example Facebook and Twitter, have made it possible for users to express their interests through “liking” or following a certain interest. However, users have to navigate through various website links in order to find recommendations. We introduce a more efficient, aggregated way for users to find recommended interests. This study proposes a web application for social networking sites that recommends people, places, and things that the users should follow, “like” or visit based on their current subscriptions and checkins. We will be implementing algorithms such as a reputation system and collaborative filtering
ANALYSIS OF PERFORMANCE DEGRADATION OF INTEGRATED CIRCUITS DUE TO TRANSISTOR AGING
EFFECTS IN NANO-SCALEHector Prado-Guerrero1, Jesus Garcia1, Hamid Mahmoodi2.
Cañada College, Redwood City, CA, 2San Francisco State University, San Francisco, CA.
1 Integrated circuits, or ICs, work behind the scenes to make people’s lives better. ICs can be found in common appliances, such as refrigerators and dishwashers, and in the most sophisticated computers. IC performance has dramatically improved since their first creation. However, with the scaling of ICs to nano scale, an ideal integrated circuit, delivering reliable performance over its lifetime is almost impossible. All ICs experience degradation over time due to the aging of underlying transistors. In this research, analysis of transistor breakdown is performed through computer simulations using the Custom Designer SE tool to understand effects on circuit power and performance. To simulate the effect of transistor breakdown, a ring oscillator circuit is used. This breakdown is modeled by resistors placed between the transistor terminals. The values of the resistors represent the severity of breakdown; large resistors represent fresh transistors, whereas low resistors represent a fully broken transistor. In addition to computer simulations, real ICs are studied by taking power measurements. This research aims to offer better insight into the impact of transistor breakdown on IC performance and to improve IC design in the nano scale.
DISCOVERING AND PATCHING HARDWARE SECURITY VULNERABILITIES IN A ZIGBEE WIRELESS SENSOR
NETWORK USED BY BUILDINGDEPOTAnthony Lopez, Bharathan Balaji, Yuvraj Agarwal, Rajesh Gupta, Alex Orailoglu.
University of California, San Diego, La Jolla, CA.
In recent years, the Smart Building, an ideal and automated energy-efficient building that uses a variety of automated devices has become more of a possibility. One system in research that incorporates the idea of many Smart Buildings is the BuildingDepot (BD): an office-building management system that receives data from wired and wireless sensor networks deployed across the building, processes and stores the data, and provides it to developers via RESTful API.
To obtain information from wireless sensors using ZigBee protocol, BD uses a gateway that converts the ZigBee to standard Ethernet/WiFi protocol. BD implements a “star” network, a network that contains no routers and only endnodes (sensors). For the current experimental building with four floors and ten coordinators per floor, there are many sensors which communicate with the coordinator through an open wireless medium. The wireless sensor network (WSN) implements the Texas Instruments Z-Stack (TI Z-Stack) protocol which uses AES symmetric 128-bit keys to make sure communication is secure between the coordinator and sensors. In addition, on joining the network with the correct certificate information, sensors will initiate key establishment with the coordinator. However, with a large scale “real” deployment of this WSN, security breaches may be more possible than ever. For this reason, the objective in this project is to identify and patch security vulnerabilities in a “real” deployment of ZigBee sensors used in building monitoring and actuation.
185 UNDERGRADUATE POSTER ABSTRACTS
CONSTRAINT MODEL FOR PAIRWISE TESTINGCarlos Nieto, Martine Ceberio.
University of Texas at El Paso, El Paso, TX.
Software testing is an essential part of the software development process that ensures quality, reliability, and robustness. Sometimes, testing is left for the end of a project, and exhaustively testing a system can be a very expensive and time-consuming process. Pairwise testing is the simplest form of combinatorial testing that requires every pairwise interaction of valid input values to be included in at least 1 test case of a test suite. Pairwise testing is based on the observation that most errors in a system are triggered by the interaction of at least 2 input values.
Existing pairwise approaches lack practical features such as defining user constraints and ensuring the minimal number of test cases are considered. In this work, we propose a finite domain constraint model describing the problem of generating a minimal pairwise covering test suite that satisfies user-defined constraints. In such a model, a finite set of input variables are associated with discrete domains of possible values, and the relations between the input variables are captured as constraints. A discrete constraint solver is used to infer the pruned domains for each variable and implement a backtracking process to instantiate the variables while satisfying the constraints. When combined with an optimization function, it is possible to ensure the minimal number of test cases are considered.
ANDROID-BASED BIOACOUSTICS SIGNAL FILTERINGCristina Padró,Toa Alta, Domingo Rodriguez.
University of Puerto Rico at Mayagüez, Mayagüez, PR.
The purpose of this work is to develop algorithms to conduct signal processing operations on bioacoustic signals.
The work centers on the implementation of signal filtering that could be implemented readily by users of personal digital assistants (PDAs), such as e-Tablets and smartphones, under an Android-based platform. Android, as a Linuxbased operating system mainly used for electronic visual-display applications, will bring value added capabilities to researchers in the field studying bioacoustics signals. Bioacoustics is defined as the study of natural sounds produced by animals, including humans. Our specific work deals with the implementation of different types of signal filters, such as low-pass, high-pass, band-pass, and band-reject filters, in order to assist in the preprocessing of bioacoustics signals in the field using an Android-based device. The OMAP (Open Media Applications Platform) is being used as a target testbed implementation environment. The OMAP is a multicore device possessing an ARM architecture processor core where the Android is being ported. The OMAP also has a floating-point digital signal processor where the filtering algorithms will be initially tested before being ported to the ARM processor. It is expected that a class of efficient signal filtering algorithms may be developed that could run exclusively on the ARM processors, making them suitable for Android-based PDAs.
POWER-LINE MONITORING USING LOW-COST SIGNAL PROCESSING TECHNIQUESGabriela Torres, Domingo Rodriguez.
University of Puerto Rico at Mayagüez, Mayagüez, PR.
With the increasing divestiture of power generation it is becoming very important to develop efficient, low-cost techniques for power-line signal monitoring in order to guarantee the safety and specifications of the power being delivered to customers. This work deals with the development of low-cost power line signal-monitoring techniques for power quality applications. The work centers on the use of signal processing algorithms to provide signal metrics that evaluate the set of power disturbances commonly experienced in a power line environment. Our specific work deals with the design of a voltage step-down circuit that will allow power line signals to be fed to digital signal processing devices. At the present time, TMS320C6713 floating-point digital signal processing is being used to implement these signal processing algorithms. The voltage step-down circuit is being implemented using a step down transformer. A signals and systems characterization of this device is also being conducted in order to evaluate its noise characteristics and determine what noise is being produced by the step-down circuit itself and what noise or disturbance is inherent in the power line signal under analysis.
CORRELATING POWER SYSTEM RESPONSES WITH NOTIONS OF ELECTRICAL DISTANCE: A STATISTICALAPPROACH Carlos Flores1, Aranya Chakrabortty2.
University of California, Davis, Davis, CA, 2North Carolina State University, Raleigh, NC.