Augustana Invitational Robotics Challenge 2018

We will be hosting the 3rd Annual Augustana Invitational Robotics Challenge. This event will involve student teams from Augustana and potentially several other schools in the region bringing forth the robots that they have designed, built, and programmed, to compete against one another. This year\u27s challenge task involves the careful relocation of soda pop cans

Swedish Immigrant Trail Game Report

During the 2017-2018 academic year, I led a collaborative interdisciplinary project to develop a historical fiction video game focused on the Swedish immigration story. With bristling debates over modern immigration in national and international politics, it seems more important than ever for us to look to history to understand the immigrant experience, both at a personal level (immigrants\u27 lives and stories), and at a broader cultural and economic level to understand the impact they have had on our nation, and that our nation has had on them

Data Insertion in Bitcoin\u27s Blockchain

This paper provides the first comprehensive survey of methods for inserting arbitrary data into Bitcoin\u27s blockchain. Historical methods of data insertion are described, along with lesser-known techniques that are optimized for efficiency. Insertion methods are compared on the basis of efficiency, cost, convenience of data reconstruction, permanence, and potentially negative impact on the Bitcoin ecosystem

Designing and Evaluating the Quality and Cost-effectiveness of Saturated Sediment Permeameters

Many simulations require accurate measurements of saturated hydraulic conductivity, a sediment property that governs the speed at which water flows through sediments relative to head differences. The goal of our project is to design and build an inexpensive permeameter capable of producing accurate hydraulic conductivity values. We tested four permeameters; a standard research grade constant-head permeameter, a falling-head permeameter modeled off of an in situ stream method, a constant-head permeameter made out of 4” PVC pipe, and a similar constant-head permeameter made out of 2” PVC pipe. Our custom-built constant-head permeameters both utilized a U-shaped design, two tubes which form a manometer, and multiple output overflows. Despite significant differences in design, method, and cost, we found that all four of the permeameters yielded relatively consistent mean hydraulic conductivities with low standard deviations (0.004-0.019). We also compared the attributes: price, weight, and number of parts. Our conclusion is that because the average K-value and standard deviation of each design is within reason, the best choice depends on the practitioner’s situation and intention

Designing and Evaluating the Quality and Cost-effectiveness of Saturated Sediment Permeameters

Many simulations require accurate measurements of saturated hydraulic conductivity, a sediment property that governs the speed at which water flows through sediments relative to head differences. The goal of our project is to design and build an inexpensive permeameter capable of producing accurate hydraulic conductivity values. We tested four permeameters; a standard research grade constant-head permeameter, a falling-head permeameter modeled off of an in situ stream method, a constant-head permeameter made out of 4” PVC pipe, and a similar constant-head permeameter made out of 2” PVC pipe. Our custom-built constant-head permeameters both utilized a U-shaped design, two tubes which form a manometer, and multiple output overflows. Despite significant differences in design, method, and cost, we found that all four of the permeameters yielded relatively consistent mean hydraulic conductivities with low standard deviations (0.004-0.019). We also compared the attributes: price, weight, and number of parts. Our conclusion is that because the average K-value and standard deviation of each design is within reason, the best choice depends on the practitioner’s situation and intention.Faculty Sponsor: Susa H. Stonedah

The Gerridae or water striders of Oregon and Washington (Hemiptera: Heteroptera)

Seven species of Gerridae are known to occur in Oregon and Washington. These are Gerris (Aquarius) remigis Say, Gerris (Gerris) buenoi Kirkaldy, Gerris (Gerris) gillettei Lethierry and Severin, Gerris (Gerris) incognitus Drake and Hottes, Gerris (Gerris) incurvatus Drake and Hottes, Limnoporus notabilis (Drake and Hottes), and Metrobates trux infuscatus Usinger. The literature dealing with the family is reviewed. A diagnostic key for species identification is given. Species diagnoses, geographical and seasonal distributions, habitat preferences, and illustrations of abdominal regions also are provided.Published April 1982. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalo

Analyzing and Designing an Arduino Controlled System to Study the Effect of Changing Water Levels on Water Flow Through Sediments

The hyporheic zone is the region of sediment under a stream where water from the stream flows before returning to the stream itself. Many studies focus on steady water flow through this region, however, in natural systems, water levels and water flow rates change due to storms, tides, dams, or melting snow. To investigate flow under unsteady conditions, we built a system that allows us to control the water level and thus the flow rates. We used a pressure sensor that is connected to an Arduino board to measure the water level. The Arduino board uses the measured pressure value to control a water pump. When the water level is lower than desired, the pump will turn on and when it is higher than desired, it will turn off. This allowed us to hold the water level constant or tell it to oscillate. We then evaluated our system by comparing our desired water level functions to those measured with our pressure sensor, those measured by a pressure transducer connected to a separate Arduino, and those we extracted from videos of our system

Eurychilopterella complex of genera

33 p. : ill. ; 26 cm.Includes bibliographical references (p. 32-33)