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Thin Safety Margin: The Sefor Super-Prompt-Critical Transient Experiments, Ozark Mountains, Arkansas 1970–1971, Jerry Havens, Collis Geren

Arkansas Scholarly Editions

Thin Safety Margin charts the history of SEFOR, a twenty-megawatt reactor that operated for three years in the rural Ozark Mountains of Arkansas as part of an internationally sponsored program designed to demonstrate the Doppler effect in plutonium-oxide-fueled fast reactors. Authors Jerry Havens and Collis Geren draw upon this history to assess the accidental explosion risk inherent in using fast reactors to reduce the energy industry’s carbon dioxide emissions.

If a sufficiently powerful fast-neutron explosion were to cause the containment of a reactor such as SEFOR’s to fail, the reactor’s radiotoxic plutonium fuel could vaporize and escape into the surrounding …

Signals And Systems, Jingxian Wu

Open Educational Resources

Signals and Systems is a core Electrical Engineering undergraduate course. This course covers the topics of signal and system analysis, with an emphasis on the analysis of linear time-invariant systems. The materials presented in this course are designed for a 15-week course for junior or senior level students. The open access materials for this course include:

Course outline and guides: a detailed guideline that provides a week-by-week teaching schedule for a 15-week semester.

Lecture notes: a complete set of lecture notes with detailed explanations and a large number of examples that cover all the contents that are offered in this …

Interdisciplinary Education Outreach With Traffic Sensor Build Kits, Sarah V. Hernandez, Mariah B. Crews

Civil Engineering Teaching and Learning

The goal of this project was to attract K-12 students to transportation engineering careers through STEM outreach programs. To accomplish this goal, the object of the project was to design and implement maritime freight oriented educational outreach activities centered on traffic sensing technologies for middle, high school, and first-year college students. In MarTREC Project 5011 (Evaluating the Performance of Intermodal Connectors), the research team designed a low-cost, easily implementable LiDAR and Bluetooth sensor bundle that was capable of detecting, characterizing, and tracking freight trucks as they traveled to and from inland waterway port areas. The sensor provided data necessary to …

Open Technical Writing: An Open-Access Text For Instruction In Technical And Professional Writing, Adam Rex Pope

Open Educational Resources

This book presents technical writing as an approach to researching and carrying out writing that centers on technical subject matter. Each and every chapter is devoted to helping students understand that good technical writing is situationally-aware and context-driven. Technical writing doesn’t work off knowing the one true right way of doing things—there is no magic report template out there that will always work. Instead, the focus is on offering students a series of approaches they can use to map out their situations and do research accordingly.

University Physics I: Classical Mechanics, Julio Gea-Banacloche

Open Educational Resources

This is a textbook for the first semester of University Physics for scientists and engineers. It covers classical mechanics, and a brief introduction to thermodynamics. The presentation and approach are similar to Mazur’s “The Principles and Practice of Physics,” in that conservation laws are introduced before forces, and one-dimensional systems thoroughly covered before moving to two dimensions. Although the course is “calculus based,” the book has been written with the understanding that many students may be taking calculus simultaneously as a corequisite, so the use of calculus is relatively sparse.

This revised version (Fall 2019) takes into account a number …

Astronomy For Educators, Daniel E. Barth

Open Educational Resources

Astronomy for Educators provides new and accomplished K-12 instructors with concepts and projects for low-cost, high-impact STEM classroom instruction that is built around the National Academies National Research Council's K-12 Framework for Science Education.

Re-Live Downtown Pine Bluff, Community Design Center

Project Reports

Once a prosperous cultural urban center in the Mississippi River delta, but now the nation’s second fastest shrinking city, Pine Bluff (population: 42,700) is Arkansas’ Detroit. Indeed, a study of black wealth conducted by famed sociologist W. E. B. Du Bois in 1899 found that Pine Bluff had the fourth highest rate of black wealth in the nation behind Charleston, Richmond, and New York City. The school’s community design center prepared a downtown revitalization plan, Re-Live Downtown Pine Bluff, a housing-first initiative focused on building neighborhoods around downtown “centers of strength”. While the revitalization approach is triaged around a …

Center For Farm And Food System Entrepreneurship, Community Design Center

Project Reports

The average age of the American farmer is 58. Since communities are not reproducing the next generation of farmers, universities are establishing training centers to model new concepts and technologies in farming. The Farmers Training Center is both an immersive program in the rhythms of farm life and a public facility for hosting gatherings that celebrate value-added food products. Part of the University of Arkansas’ farm operations near campus, the center is the public face of agriculture where farmers and the public meet. Student farmers learn by farming, from organic vegetable production in fields and greenhouses, to machine repair, marketing, …

Willow Heights Livability Improvement Plan, Community Design Center

Project Reports

Willow Heights is a 43-year old public housing complex owned by the Fayetteville Housing Authority (FHA) within the federal public housing portfolio administered by the Department of Housing and Urban Development (HUD). The school’s design center was commissioned by a local foundation to study an alternative to the FHA’s plan to sell the downtown Willow Heights complex to a developer of high-income housing, necessitating relocation of low-income residents to another complex outside of downtown. Using equity as a driver of decision making, the studio introduced scenario planning to organize reluctant stakeholders in considering transformations to the five-acre complex.

New Beginnings Homeless Transition Village, Community Design Center

Project Reports

More than three million Americans experience homelessness annually. Emergency shelter capacity is limited while local governments are unable to provide even temporary housing. Informal housing involving interim self-help solutions are now popular adaptive actions for obtaining shelter despite nonconformance with city codes. Unfortunately, most informal solutions have resulted in objectionable tent cities and squatter campgrounds where the local response has simply been to move the problem around. Our homeless transition village plan prototypes a shelter-first solution using a kit-of-parts that can be replicated in other communities. Village design reconciles key gaps between informal building practices and formal sector regulations, creating …

Introduction To Signal Timing & Traffic Control, Sarah V. Hernandez, Mariah Crew, Karla Diaz-Corro, Taslima Akter

Civil Engineering Teaching and Learning

The purpose of these lesson plans is to introduce students to traffic signalization basics. Students will be lead through a series of mini-lectures on traffic control and signalization including a discussion on the limitations and benefits of traffic signalization. The lesson plans compliment a computer simulation “game” in which students act as manual operators for a single up to four by four gridded intersection. Students attempt to control the progression of signals to understand the relationship between signal timing and user delay. Through experimentation with the simulation, students generate a presentation discussing the benefits and drawbacks of signal timing and …

Transportation Engineering: Traffic Control Simulator, Sarah V. Hernandez, Karla Diaz-Corro, Taslima Akter, Magdalena Asborno, Fu Durandal

Civil Engineering Teaching and Learning

The purpose of these lesson plans is to introduce students to traffic signalization basics. Students will be lead through a series of mini-lectures on traffic control and signalization including a discussion on the limitations and benefits of traffic signalization. The lesson plans compliment a computer simulation “game” in which students act as manual operators for a single up to four by four gridded intersection. Students attempt to control the progression of signals to understand the relationship between signal timing and user delay. Through experimentation with the simulation, students generate a presentation discussing the benefits and drawbacks of signal timing and …

The Freeman Performing Arts Center, Community Design Center

Project Reports

The Freeman Performing Arts Center marks the threshold between prairie and civic life. This small agricultural community of 1,300 has an outsized Anabaptist music tradition recognized nationally. The 37,000 sf hall-type building unifies a miscellaneous collection of public buildings and landscapes at the southwest corner of the town’s one-mile grid. The center’s massing projects an ascending system of familiar gable roofs, which absorb the fly tower into a composition reflective of pragmatic building forms. The principal face of the building is a translucent curtain wall that illuminates interior massing—a beacon on the prairie. A thru-Porch celebrates transitions between the prairie’s …

Ralph Bunche Agape Neighborhood Vision Plan, Community Design Center

Project Reports

The Ralphe Bunche Neighborhood Vision Plan provides a general design framework to spur reinvestment in this 100-year old historic African-American neighborhood in Benton, AR. The plan aggregates attainable housing (under $100,000/unit) around two neighborhood parks―one existing, and one proposed. Since the city cannot afford comprehensive street and drainage improvements to accommodate redevelopment, the proposal retrofits streets and open space with Low Impact Development (LID) landscapes to remediate urban stormwater runoff. Housing unit types between 1,000 and 1,750 square feet are amassed around these LID landscapes and amenitized with screened rooms, balconies, terraces, and multiple-height living spaces.

Macarthur Park Master Plan, Community Design Center

Project Reports

Like waterfronts and transit stops, parks leverage value in urban areas. While much recent attention has been given to the signature mega-park, the value of the small-scale neighborhood park in reinventing the city has been overlooked. Once connecting neighborhoods of differing character, and sponsoring more than 80 residential structures along its edges, the historic MacArthur Park at the edge of downtown Little Rock is radically underutilized as an urban neighborhood asset. Severed from its neighborhoods along two edges by interstate construction in the 1960s, this moribund 40-acre municipal park is left with only 16 residential structures along its frontage. The …

Porchscapes: Between Neighborhood Watershed And Home, Community Design Center

Project Reports

Located on the Ozark Plateau, this 43-unit housing development is a LEED-ND (Neighborhood Development) pilot project to be built for $60/sf plus $2.3 million in infrastructure costs. The studio objective is to design a demonstration project that combines affordability with best environmental practices as designated by the U.S. Green Building Council (USGBC). Porchscapes is a pioneering Low Impact Development (LID) project funded under the U.S. Environmental Protection Agency’s Section 319 Program for Nonpoint Source Pollution. LID manages stormwater runoff through ecological engineering technologies. A contiguous network of rainwater gardens, bioswales, infiltration trenches, sediment filter strips, green streets, and wet meadows …

Habitat Trails . . . A Manual For Affordable Green Neighborhood Development, Community Design Center

Project Reports

Habitat Trails is a green affordable neighborhood development consisting of 17 Habitat for Humanity homes. The site is designed as a sponge to work in accord with existing hydrological drainage, catchment, and recharge patterns. Stormwater runoff is retained and treated through a contiguous network of bioswales, infiltration trenches, stormwater gardens, sediment filter strips, and a constructed wet meadow. The integration of a treatment landscape with open space substitutes an ecologically-based stormwater management system for the expensive curb-gutter-pipe solution in civil infrastructure.