2008 Proceedings - St. Cloud State University
2008 Proceedings - St. Cloud State University
2008 Proceedings - St. Cloud State University
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Abstracts<br />
Session A All Disciplines Ballroom<br />
Surface Charge Carrier Mobilities in Organic Semiconductor Materials by Field-Effect and Time-of-Flight Measurement<br />
Techniques<br />
In a number of electronic devices (such as field effect transistors), the transport of the charge carriers (electrons and holes) is on or near<br />
the surface of the material. The mobility of a material is a quantity that relates the charge carrier transport speed under an applied electric<br />
field, and can be computed from time-of-flight (TOF) measurements. Field Effect Transistors (FETs), in general, operate by inducing a field<br />
between the gate and body of the device resulting in a buildup of charge carriers at the body surface to form a channel of charge.<br />
Contacts near each end of the channel allow current to flow through the device, provided that the channel has enough charge carriers<br />
present; the mobility of the carrier influences the device's current capability. The mobility of charge carriers in a FET can be computed<br />
from current-voltage data from the FET. In this project, we will fabricate organic field-effect transistors (OFET) using rubrene crystals. We<br />
will characterize and compare the surface charge carrier mobilities of the rubrene crystal using TOF and standard FET device<br />
characterization techniques.<br />
Presentation Index: A41<br />
Time: 9:00 a.m.<br />
Department: Electrical and Computer Engineering; Physics<br />
Project Sponsor(s):<br />
<strong>St</strong>udent Presenter(s): Magnan, Brandon; Holste, Tor<br />
Vogt, Timothy; Lidberg, Russell<br />
Powertrain for an Electric Motorcycle<br />
Our goal is to provide a reliable, zero emission, and efficient alternative to a combustion engine which will be used for commuting in city<br />
traffic. We will be replacing the gas powertrain of a motorcycle with an electric powertrain. The electric powertrain consists of the electric<br />
motor, electrical control system, batteries, and a battery recharging system. The battery recharging system will connect to a regular<br />
household outlet. This will provide an alternative form of transportation and reduce pollutant emissions. All of these components will later<br />
be mounted to the electric motorcycle. Using knowledge acquired from coursework, and research going beyond the classroom, we will be<br />
designing the necessary components to integrate all of these systems into one.<br />
Presentation Index: A42<br />
Time: 9:00 a.m.<br />
Department: Electrical and Computer Engineering<br />
Project Sponsor(s):<br />
<strong>St</strong>udent Presenter(s): Krehic, Damir; Tatge, Zach; Suzuki, Motohisa<br />
Glazos, Michael<br />
Control Interface for Electric Motorcycle<br />
The goal of this project is to design and build lighting, braking, sensor, and display systems for an electric motorcycle capable of carrying<br />
one person. The complete system will include batteries to supply power to the lights, sensors, brakes, and display along with a charging<br />
system for the batteries. The system will be able to operate continually for a minimum 4 hours without recharging. The lighting system will<br />
consist of headlights, brake lights, and turning signal lights. Each of these would be implemented using ultra bright LEDs. The braking<br />
system will be realized by adapting the current mechanical system to work with an electric motor. The sensor system will include sensors<br />
to monitor the speed of the bike, the charge of the battery for the main motor, charge of the battery for the lighting system. The batteries<br />
must have sufficient capacity to supply power to all the systems. The charging system will bring the batteries to full charge within 8 hours<br />
of continuous charging. This project will use electrical knowledge to help address the problems of fuel consumption and further the pursuit<br />
of environmentally friendly transportation.<br />
Presentation Index: A43<br />
Time: 9:00 a.m.<br />
Department: Electrical and Computer Engineering<br />
Project Sponsor(s):<br />
<strong>St</strong>udent Presenter(s): <strong>St</strong>eckelberg, John; Toomey, Jesse; Sappurissakul, Sutee Glazos, Michael<br />
Quantity and Quality of Suspended Particulate Organic Matter Upstream and Downstream of a Series of Surface Release<br />
Impoundments on the Upper Mississippi River<br />
Impoundments can impact a river in many ways. They can change the river flow and temperature, as well as impact the quantity and<br />
quality of particulate organic matter (POM). POM is an important food resource for many bottom-dwelling invertebrates, such as insects. A<br />
study was conducted on the Upper Mississippi River to compare the differences in both the quantity and the quality of the POM that flows<br />
into the reservoir to that which flows out of the impoundment. It is hypothesized that the carbon to phosphorous ration will decrease below<br />
the impoundment. There will also be an increase in the amount of find POM. Nine, one liter samples were collected upstream and<br />
downstream of four impoundments on the Upper Mississippi River. The ratio of organic to inorganic particulate matter will be determined.<br />
The quality of the samples will be determined by comparing the ratio of carbon to phosphorous.<br />
Presentation Index: A44<br />
Time: 9:00 a.m.<br />
Department: Biological Sciences<br />
Project Sponsor(s):<br />
<strong>St</strong>udent Presenter(s): Mankowski, Joshua<br />
Voelz, Neal<br />
<strong>St</strong>. <strong>Cloud</strong> <strong>St</strong>ate <strong>University</strong> <strong>St</strong>udent Research Colloquium 29<br />
April 22, <strong>2008</strong>