Engineering Commons^™

Limitations Of Poole–Frenkel Conduction In Bilayer Hfo2/Sio2 Mos Devices, Richard G. Southwick Iii, Justin Reed, Christopher Buu, Ross Butler, Gennadi Bersuker, William B. Knowlton

Materials Science and Engineering Faculty Publications and Presentations

The gate leakage current of metal–oxide– semiconductors (MOSs) composed of hafnium oxide (HfO₂) exhibits temperature dependence, which is usually attributed to the standard Poole–Frenkel (P–F) transport model. However, the reported magnitudes of the trap barrier height vary significantly. This paper explores the fundamental challenges associated with applying the P–F model to describe transport in HfO₂/SiO₂ bilayers in n/p MOS field-effect transistors composed of 3- and 5-nm HfO₂ on 1.1-nm SiO₂ dielectric stacks. The extracted P–F trap barrier height is shown to be dependent on several variables including the following: the temperature range, method …

Development Of A 12 Kva Dsp-Controlled Laboratory Prototype Upqc, Iurie Axente, Jayanti Navilgone Ganesh, Malabika Basu, Michael Conlon, Kevin Gaughan

Articles

This paper reports the development of a laboratory prototype of a fully digital DSP-controlled 12-kVA unified power quality conditioner (UPQC), capable of compensating for both the supply voltage and the load current imperfections. A fully digital controller based on the TMS320F2812 DSP platform is implemented for the reference generation as well as control purposes. The delay problem in the digital controller is overcome by application of a fast DSP, a compact control technique and proper flow of control steps in the DSP software. A phase-locked loopless software grid synchronization method has been implemented for the effective operation of the UPQC …

Final Design Report: Vibration Table For Cvbt- Vt4 Design Team, Thomas Bevan, Matthew Laurino

Mechanical Engineering

CVBT (Center for Vocational Building Technology) teaches villagers in Northeastern Thailand how to make various concrete products. Many of these products require the use of a vibration table in order to remove air and water trapped within the concrete. Removal of these voids improves the outside surface of the molded concrete, and also allows the use of a lower water to cement ratio, allowing a much stronger finished product. The currently used vibration table (VT3) has several disadvantages associated with it, which the new table (VT4) eliminates. Compared with the VT3, the VT4 has a more rigid tabletop and improved …

Human Powered Helicopter, Brenton Haven, Daniel Hudson, Eli Knight

Mechanical Engineering

Fall of 2009, The Cal Poly Aircraft Construction club restarted Cal Poly's quest for the Sikorsky prize. The Sikorsky prize rewards the first a human powered helicopter to sustain controlled hover for one minute without stored energy. Throughout the 1980’s, Cal Poly made three attempts; the most successful being the DaVinci III. Also, the DaVinci III was the first ever publically recognized successful human powered helicopter to leave the ground. This scope of this project is to improve the DaVinci III fuselage and drivetrain for the DaVinci IV. The DaVinci IV adopts the DaVinci III system layout and improves both …

Edwards Automation Final Project Report, Benjamin (Ben) Johnson, Joel Masters, Matthew (Matt) Stewart

Mechanical Engineering

The body of this work has been created for Edwards Lifesciences in conjunction with senior project requirements. As such, the information produced and contained within is under a non‐disclosure agreement. As per request by sponsor, the body of the work will not be submitted to any outside parties, and the title page will serve as proof of completion.

Solar Array Suspension Mechanism Final Design Report For Atk Space, Alex Gould, Randon Kruse, Jeremy Graul, Patrick Barney

Mechanical Engineering

The purpose of this project is to improve the existing Solar Array Suspension Mechanism used by ATK Space for the manufacturing and testing of deployable solar arrays. The current system requires too much time to operate and has too many removable parts that may fall and damage the solar arrays. Through the design and verification process the team successfully constructed a quick connecting suspension mechanism that requires no tools to use and has no removable parts. The final design includes the existing force gauge and large adjustment bars used by ATK Space with the addition of a compression spring adjustment …

Pg&E Flow Loop Simulator, Cole Brooks, Seth Berger, Ben Thacker

Mechanical Engineering

PG&E’s Diablo Canyon Power Plant requested a full-sized Flow Loop Simulator to train technicians by giving them hands-on experience. The basic design requirements were established to determine the scope of the project and develop the specific characteristics of the system. The detailed system design is composed of a piping schematic, a three-dimensional layout of the system components and piping, and a skid structure for the support and transportation of the system. Heat transfer and fluid mechanics were used to analyze the system to size components.

Strider, Eric Johnson, Alex Trask, Ricardo Garcia

Mechanical Engineering

No abstract provided.

Snmp Integration Into The Cygnet Scada System, Paul Fake

Computer Engineering

The SNMP Remote Device is a CygNet-integrated software device that can communicate (read-only) with any managed network hardware. It has the ability to retrieve any managed object, requiring only a host name or IP, a community name (password), and the object identifier (OID). This Remote Device is fully-integrated into the CygNet SCADA system. Users can create the device in the DDS service, create a Point for each managed object, map the Points to UDCs, store data into the Points, and schedule the retrieval of data.

Memento: Personal Scrapbook Android Application, Ryan Joseph Rosete

Computer Engineering

The Memento project focuses on providing Android phone users with a new alternative to capture memories. Its main purpose is to create an application that stores pictures and data on an Android phone. Users can view these saved entries for later use to recall what they have done in the past or show to others. The initial idea for this project stemmed from a personal interest in both scrapbooks and popular microblog services. The application aims to provide a new service that is currently not offered in the Android Market.

In order to create this application, there are two main …

A Low Power Touch Screen Document Viewer, Chris Perfetto

Computer Engineering

This document will cover the requirements, design, implementation and testing of a low power touch screen document viewer to serve as a replacement bulletin board. It was Implemented using a BeagleBoard development board, a 4.3” touchscreen LCD and a SD card with a Ubuntu Linux OS installed. The testing of this device is primarily testing the power consumption. The device is not yet complete and will require further development for it to completely satisfy the requirements.

Ultrasonic Shark-Tag Locator System For Iver2 Auv, Nathaniel Garcia

Computer Engineering

The purpose of this project is to develop a system for tracking an ultrasonic underwater transmitter that can be integrated into an IVER2 AUV to allow it to follow and monitor tagged sharks in the ocean for scientific research.

The system consists of a four main components including a shark-tag, two hydrophones, a filter/amplifier & threshold detector circuit, and a microcontroller.

This project, while not completing field testing and integration with the IVER2, is a proof of concept of a system that utilizes passive sonar to determine a bearing from the system to a shark-tag transmitter. Additionally, it devised several …

Irrigation Leak Detection: Using Flow Rate Sensors To Detect Breaks In An Irrigation System, Adam Openshaw, Kalvin Vu

Computer Engineering

This report details the exploration and invention of a mechanism that can detect breaks in an irrigation system. With the ultimate goal of conserving water, we have designed an inexpensive, self sustaining flow rate monitor that can be used to identify anomalies in an irrigation system and wirelessly communicate the status of the system to a base station. Our implementation can also determine the direction of the anomaly based on the nature of the anomaly itself. This means that multiple monitors can be used to pinpoint the location of a break within the system in addition to merely detecting its …

Nexys 2 Slot Machine, Mark Luna

Computer Engineering

No abstract provided.

Bluetooth "Clicker": Response Pads For Large Classes, Using Bluetooth Devices, Dana Goyette

Computer Engineering

When teaching classes with many students, many teachers opt to use “Clicker” devices to electronically poll students. This project aims to replace these “Clicker” devices with standard Bluetooth devices. The overall goal of this project is to create a framework for two-way communications between a base station and multiple remote devices.

Rfid Asset Tracking And Digital Check-Out System, Jeffrey (Jeff) Migliore

Computer Engineering

An asset tracking and digital check-out system was developed using Radio Frequency Identification (RFID) and a Single Board Computer (SBC). A RFID reader was used as a check point to process transactions. The RFID reader was attached to the SBC via USB. The SBC is integrated into a network via Ethernet and hosts a web graphical user interface (GUI) frontend for users to view transactions and query availability of assets. A MYSQL database was used for the backend storage of data.

Specifically, this system was designed to track tool assets. Many modern companies have employees sharing limited resources. The common …

Household Outlet Monitoring And Control System, Michael Young

Computer Engineering

No abstract provided.

Wii-Mote Head Tracking: A Three Dimensional Virtual Reality Display, David Fairman

Computer Engineering

The goal of this project is to create a customizable three dimensional virtual reality display on a system available to any non-technical user. This System will use the infrared camera component of a standard Nintendo Wii-mote to track a user's head motions in all six major directions. The virtual reality will be a customizable image projected onto a screen or simply shown on a computer or TV monitor. In order to appear 3-dimensional, the image will continually change according to the position of the user's head. As the user moves their head to the left and right, portions of the …

Recovery Of Carbon Dioxide From Flue Gases, Fahad Husain Al-Masabi

Theses

In this thesis, the modeling and simulation of the absorption of dilute CO₂ into falling film of aqueous solutions of a sterically hindered amine, 2-anino-2-methyl-1-propanol (AMP), was carried out using COMSOL Multiphysics Version 3.3. The operating cases were divided in two groups: (1) gas turbine operating cases (CO₂ 3 mol %) and (II) boiler operating cases (CO₂ 8.5 mol %). The key operating parameters for the studied cases are CO₂ partial pressure, operating temperature and amine concentration in the aqueous solution. The simulation focused on the following: (1) CO₂ Loading in aqueous AMP solution; (2) …

Educational Operations Four Days A Week, Charles O. Pringle, William Bender

Engineering Technologies, Safety, and Construction Faculty Scholarship

Four day work weeks have been employed by industry, state agencies, and recently by higher education. The generally perceived benefit of the four day work week is reduced energy costs. These costs savings include more efficient building operations and less energy consumption driving to a facility. The generally perceived negative impact of four day operations, particularly of state agencies, is a decreased level of service.

How much energy would be saved and could the level of service be maintained in a higher educational environment by switching from five to four day weeks? This study occurs at a regional university within …