Engineering Commons^™

A Sketch-Based Rapid Modeling Method For Crime Scene Presentation, Pu Ren, Wuyang Shui, Jin Liu, Yachun Fan, Wenshuo Zhao, Mingquan Zhou

Journal of Digital Forensics, Security and Law

The reconstruction of crime scene plays an important role in digital forensic application. This article integrates computer graphics, sketch-based retrieval and virtual reality (VR) techniques to develop a low-cost and rapid 3D crime scene presentation approach, which can be used by investigators to analyze and simulate the criminal process. First, we constructed a collection of 3D models for indoor crime scenes using various popular techniques, including laser scanning, image-based modeling and geometric modeling. Second, to quickly obtain an object of interest from the 3D model database, a sketch-based retrieval method was proposed. Finally, a rapid modeling system that integrates our …

Experimental Investigation Of A New Spiral Wingtip, Naseeb Ahmed Siddiqui, Mohammed Aldheeb, Waqar Asrar, Erwin Sulaeman

International Journal of Aviation, Aeronautics, and Aerospace

Experiments on the relative merits and demerits of slotted wingtips mimicking a bird’s primary feathers have been performed. The real emargination length of feather tips, their flexibility and curved shapes during cruise are considered in the present study. The experiments were performed at a Reynolds number of 3.7 x 10⁵ on a symmetric flat plate half wing of aspect ratio 3. Lift, drag and pitching moments were measured using a six component aerodynamic balance. Four different shapes inspired by bird primary feathers have been analysed. The rigid curved tip performed the best increasing the L/D ratio by 20%. This …

Modeling And Validation Of Local Electrowinning Electrode Current Density Using Two Phase Flow And Nernst-Planck Equations, Joshua M. Werner, W. Zeng, M. L. Free, Z. Zhang, J. Cho

Mining Engineering Faculty Publications

In this work we demonstrate the validity of a multi-physics model using COMSOL to predict the local current density distribution at the cathode of a copper electrowinning test cell. Important developments utilizing Euler-Euler bubbly flow with coupled Nernst-Planck transport equations allow additional insights into deposit characteristics and topographies.

Highly Efficient Electrochemical Reforming Of Ch4/Co2 In A Solid Oxide Electrolyser, Jinhai Lu, Changli Zhu, Changchang Pan, Wenlie Lin, John P. Lemmon, Fanglin Chen, Chunsen Li, Kui Xie

Faculty Publications

Reforming CH₄ into syngas using CO₂ remains a fundamental challenge due to carbon deposition and nanocatalyst instability. We, for the first time, demonstrate highly efficient electrochemical reforming of CH₄/CO₂ to produce syngas in a solid oxide electrolyser with CO₂ electrolysis in the cathode and CH₄ oxidation in the anode. In situ exsolution of an anchored metal/oxide interface on perovskite electrode delivers remarkably enhanced coking resistance and catalyst stability. In situ Fourier transform infrared characterizations combined with first principle calculations disclose the interface activation of CO₂ at a transition state between a CO …

Simplified Approach For Structural Evaluation Of Flexible Pavements At The Network Level, Karthikeyan Loganathan

Civil Engineering Theses

Currently, there is no simple procedure available to identify structurally weak pavement sections using Falling Weight Deflectometer (FWD) data at the network level (e.g., city, state or province). A simple method is needed to determine the structural condition of pavement sections that can be directly implemented and automated in the current pavement databases. The method needs to be simple enough to be used with a network level FWD database for the purpose of numerically ranking pavement sections at the network level from good to poor. Backcalculation has been utilized to obtain layer moduli and determine overlay (new added surface pavement …

Nanosatellite Space Experiment, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A report written by Professor Bob Twiggs titled "Nanosatellite Space Experiment" from March 30, 2018.

In Situ Extrinsic Doping Of Cdte Thin Films For Photovoltaic Applications, Imran Suhrid Khan

USF Tampa Graduate Theses and Dissertations

The Cadmium Telluride thin film solar cell is one of the leading photovoltaic technologies. Efficiency improvements in the past decade made it a very attractive and practical source of renewable energy. Considering the theoretical limit, there is still room for improvement, especially the cell’s open circuit voltage (VOC). To improve VOC, the p-type carrier concentration and minority carrier lifetime of the CdTe absorber needs to be improved. Both these parameters are directly related to the point defect distribution of the semiconductor, which is a function of deposition stoichiometry, dopant incorporation and post-deposition treatments.

CdTe films were deposited by the Elemental …

Mash Test No. 3-10 Of A Non-Proprietary, High-Tension, Cable Median Barrier For Use In 6h:1v V-Ditch (Test No. Mwp-9), Mojdeh Asadollahi Pajouh, Karla A. Lechtenberg, Ronald K. Faller, James C. Holloway, Robert W. Bielenberg, Scott K. Rosenbaugh

Nebraska Department of Transportation: Research Reports

The Midwest Pooled Fund Program has been developing a prototype design for a non-proprietary, high-tension, cable median barrier for use in a 6H:1V median V-ditch. This system incorporates four evenly spaced cables, Midwest Weak Posts (MWPs) spaced at 8 to 16 ft (2.4 to 4.9 m) intervals, and a bolted, tabbed bracket to attach the cables to each post. Full-scale crash testing was needed to evaluate the barrier’s safety performance. According to the Manual for Assessing Safety Hardware 2016 (MASH) testing matrix for cable barriers installed within a 6H:1V median V-ditch, a series of eight full-scale crash tests are required …

Phase Ii Evaluation Of Floor Pan Tearing For Cable Barrier Systems, Dylan T. Meyer, Mojdeh Asadollahi Pajouh, Karla A. Lechtenberg, Ronald K. Faller, Robert W. Bielenberg, James C. Holloway

Nebraska Department of Transportation: Research Reports

The objective of this research effort was to mitigate the potential for floor pan tearing and penetration into the occupant compartment by modifying the posts utilized in a prototype cable barrier system. A series of dynamic component tests were conducted on the modified Midwest Weak Post (MWP). A bogie vehicle was equipped with a simulated floor pan designed to replicate the height, thickness, and strength of the floor pan of a Kia Rio. Two methods of post modification were investigated, including edge protection on the top of the MWP as well as weakening of the MWP at the ground line. …

Artificial Recharge Of Groundwater As A Management Tool For The Kabul Basin, Afghanistan, Mohammad Farid Masoom

LSU Master's Theses

Decades of war and political instability, consecutive droughts, population increase and displacement, caused serious infrastructural damages to water resources of Afghanistan. The main source of water supply for people in Afghanistan is groundwater. However, over-exploitation of groundwater has led to groundwater level declines in most parts of the country. Kabul, the largest city of Afghanistan, is the capital city with a population of 4.5 million and the fifth fastest-growing city in the world. The city has observed groundwater level declines of 5-10 meters (m) since 1980. Decline of about 30 m has also been observed in one of the monitoring …

Integrated Analysis Of Flow, Form, And Function For River Management And Design Testing, Belize A. Lane, Gregory B. Pasternack, Samuel Sandoval-Solis

Civil and Environmental Engineering Faculty Publications

The extent and timing of many river ecosystem functions is controlled by the interplay of streamflow dynamics with the river corridor shape and structure. However, most river management studies evaluate the role of either flow or form without regard to their dynamic interactions. This study develops an integrated modelling approach to assess changes in ecosystem functions resulting from different river flow and form configurations. Moreover, it investigates the role of temporal variability in such flow–form–function trade‐offs. The use of synthetic, archetypal channel forms in lieu of high‐resolution topographic data reduces time and financial requirements, overcomes site‐specific topographic features, and allows …

Selection Of Energy Systems In Aquaculture Through A Decision Support Tool Considering Economic And Environmental Sustainability, Youngwoon Kim

USF Tampa Graduate Theses and Dissertations

Aquaculture had already been distinguished as an important component of global food security and economics. However, aquaculture has expanded at the cost of natural resources and the environment. The vulnerability of the aquaculture industry due to the consequences of global environmental changes and energy price fluctuations has been addressed in various studies. The identification, planning, and implementation of sustainable energy systems are important to ensure the long term economic and environmental sustainability of aquaculture.

This research investigated sustainable energy systems for aquaculture using a life cycle approach, allowing for the identification of the most sustainable energy options under different geographical …

Power Spectrum Prediction Of Amplified Dual-Band Lte-Advanced Signals, Xianzhen Yang

Dissertations and Theses

In wireless communication, the nonlinearity of a radio frequency (RF) power amplifier is an important issue for power amplifier designers. Since the nonlinearity is generated by the properties of physical components, it is hard to avoid it in producing power amplifiers. Power amplifier designers should know about the nonlinearity in order to compensate for it.

A two-tone test is a relatively widely used method to measure the nonlinearity of a power amplifier, which means the third order intercept point (IP3) can be measured from the two-tone test. Through the two-tone test, researchers have proposed some formulae to present what the …

Exploring Possible Humanoids On Mars: A Lesson Designed For Twice-Exceptional Gifted Students, Younis Al-Hassan, Marie Adebiyi, Shehreen Iqtadar, Dana L. Atwood-Blaine

Journal of STEM Arts, Crafts, and Constructions

This practical article presents a classroom-tested pedagogical plan to assist instructors in teaching thinking skills to gifted students with disabilities in the context of science. The lesson, which focused on using Edward de Bono thinking skills to explore humanoid images that appear in NASA photos, provided accommodations for students with hearing impairment, along with disabilities associated with short and long-term memory. The instructional design team presented the arts-integrated activity of drawing scenes showing possible ways the anomalies could have been generated, and an interactive electronic game using iPads that asked participants to gather needed items for a trip to Mars. …

Faces On Mars Lesson: Incorporating Art, Thinking Skills, And Disability Differentiation Strategies For Twice-Exceptional Gifted Students, Marine Pepanyan, Mike Fisher, Audrey Wallican-Green

Journal of STEM Arts, Crafts, and Constructions

This practical article provides an example art-integrated lesson designed to serve gifted students with the exceptionalities of deficits in executive functioning and in impulse control. The lesson used the mysterious science problem of possible life on Mars as evidenced by anomalous faces in NASA photographs as a stimulus for practice in processing information through three Edward de Bono CoRT Thinking Skills. This lesson demonstrated differentiating instruction for gifted students with disabilities that included hands-on and peer-involved exercises. Examples of student work showing comic book-like stories about the famous Face on Mars are included, along with student responses to the thinking …

Exploring Mars Mysteries In Nasa Photographs: Could Some Images Be Animal Skeletons?, Laura Meyer, Rob Griffin, Dan Butler

Journal of STEM Arts, Crafts, and Constructions

The NASA photographs containing what appear to be animal skeletons have created a mystery that remains unsolved today. Because they generate questions and inquiries in many arenas, the animal skeleton pictures were used to help gifted students critically think about how these structures were created. Several additional exceptionalities common in most groups of students, including attention deficit disorder with and without hyperactivity and difficulties in executive functioning, were addressed through the lesson design. The exceptionalities were addressed through methods that could be used in any classroom while using the Mars Animal Skeletons to motivate and engage students. Incorporation of teaching …

Is There Water On Mars? A De Bono Skills Mystery For Twice-Exceptional Gifted Students, Christopher Cox, Megan Sova-Tower, Nathan Wear

Journal of STEM Arts, Crafts, and Constructions

Is there water on Mars? Gifted adult graduate students, some of whom represented the learner exceptionalities of Autism Spectrum Disorder and Slow Information Processing Speed, were asked to explore this mystery by applying Edward de Bono’s CoRT thinking skills of “Aims, Goals, and Objectives,” “Select,” and “Planning” to photographs of Mars landforms. Once they had determined the likelihood that the pictures depicted water on Mars, students were asked to develop three-dimensional models with recycled materials. Analysis of the findings revealed that in utilizing the de Bono CoRT thinking skills, students were able to identify sixteen different categories. Student responses had …

Exploring Animal-Like Images In Nasa Photos Of Mars Using De Bono’S Cort Thinking Skills: Alternatives, Possibilities, And Choices, Compare, And Decisions, Kurt M. J. Devore, Allyson Rafanello, Nicholas Rafanello

Journal of STEM Arts, Crafts, and Constructions

The use of de Bono’s CoRT Thinking Skills of “Alternatives, Possibilities, and Choices,” “Compare,” and “Decisions” create opportunities for students to critically think about ideas using a new lens of thinking. The lesson was designed to accommodate twice-exceptional students, gifted students with the disabilities of dyslexia and/or dyscalculia, through three of the de Bono’s strategies integrated with activities. Gifted graduate students in this lesson were presented with an opportunity to explore and analyze the animal-like images from Mars using the three CoRT thinking skills. The photographs used in this lesson were provided by the Jet Propulsion Laboratory (JPL) and the …

Mars Mysteries: Landform Pictograms, James Zabel, Mathieu Castello, Fiddelis Blessings Makaula

Journal of STEM Arts, Crafts, and Constructions

Graphic organizers are a way for teachers to accommodate students with disabilities such as poor memory or emotional disorders. This technique allows organization of thoughts and visual representation of relationships between ideas and facts. Indeed, poor memory affects students’ reflection and retention of information while emotional disorders can cause a lack of focus in the classroom. Accommodations for students with these disabilities is important because students with emotional disorders may experience social isolation, which in turn may negatively affect their levels of academic achievement. Twenty high-achieving doctoral students participated in a teaching experience designed to introduce gifted students with learning …

Exploring Mars Glass Tube Anomalies, Kimberly S. Mccoy-Parker, Gary Benda, Stanley Ebede

Journal of STEM Arts, Crafts, and Constructions

This practical article provides information regarding the use of Edward de Bono CoRT thinking skills to broaden and enhance critical and creative thinking skills in twice exceptional students using the Mars Glass Tube Mystery as a vehicle to explore possibilities and spark creative thinking. The exceptionalities addressed in this lesson plan are gifted learners who have one or more additional exceptionalities of slow processing speed and / or poor fine motor skills. Throughout the lesson, the Mars Mystery photos leveraged both prior knowledge and student curiosity to create an engaging activity for the participants. CoRT thinking skills provided a robust …

How Did Those Get There? Exploring Structures And Pyramids On Mars, Abby Rau, Brooke Becker

Journal of STEM Arts, Crafts, and Constructions

The makeup of students in our classrooms is becoming more diverse. With this change comes the need for educators to provide accommodations for students and to employ a range of instructional strategies. Arts integration in the content areas is one way to engage students and to encourage individual expression. The purpose of this practical article is to highlight a lesson incorporating the arts and Edward de Bono’s CoRT Thinking Skills to support twice exceptional learners, specifically English Language Learners and students with Attention Deficit Disorder/Attention Deficit Hyperactivity Disorder. Doctoral students considered the formation of pyramids and structures on Mars using …

Spotlight On Edward De Bono Thinking Skills And Twice-Exceptional Gifted Learners Applied To Mars Mysteries In Nasa Photographs, Ksenia S. Zhbanova, Audrey C. Rule

Journal of STEM Arts, Crafts, and Constructions

This editorial provides background information concerning the lessons presented in the eight practical articles of this issue. All of these lessons address Mars Mysteries, anomalous features found in NASA photographs of the Martian surface. These unusual and thought-provoking features are explored by using Edward de Bono CoRT thinking skills to broaden perceptions enhancing critical and creative thinking. The lessons are intended to explore possibilities, but not to provide a definite final answer as to what the anomalies represent. These lessons were designed as enrichment lessons for gifted learners and support Renzulli’s Type I general exploratory experiences that expose students to …

2004 - Final Report, Hydrostratigraphic Analysis Of The Northern Salinas Valley

Miscellaneous Monterey and San Luis Obispo County Documents and Reports

The Monterey County Water Resources Agency (Agency) is responsible for the management and planning of water resources within Monterey County The agency uses a network of wells to monitor groundwater conditions in the Salinas Valley ground water basin (Figure 1). The progressive advancement of the seawater intrusion front into groundwater zones and the understanding of the northern Salinas ground water basin hydrogeology have been documented by the Agency since the 1950s. Only since the late 1990s was there sufficient well logs, geophysical, and lithological data to support a three-dimensional (3-D) study of the inter-related ancestral fluvial and alluvial-fan depositional environments …

Characteristics Of Helicopter Accidents Involving Male And Female Pilots, Scott S. Burgess, Robert O. Walton, P. Michael Politano

International Journal of Aviation, Aeronautics, and Aerospace

Studies examining aviation accidents have not found differences in accident rates by gender, though there may be gender differences in the types of accident. Baker, Lamb, Grabowski, and Rebok (2001) examined fixed-wing aviation accident rates of male and female private pilots and found that males were more likely to have accidents related to inattention or poor planning while female pilots were more likely to have accidents due to mishandling the aircraft. This research analyzed the National Transportation Safety Board’s aviation accident database system to examine the severity of injury and aircraft damage in rotary-wing (helicopter) accidents by gender. The data …

Value Engineering And Its Applications In Civil Engineering, Mohamed Abdel-Raheem, Victoria Burbach, Ahmed Abdelhameed, Grecia Silva Sanchez, Linda Navarro

Civil Engineering Faculty Publications

Value engineering (VE) can be a very valuable tool in the field of civil engineering and the construction industry. VE has tremendous benefits in both cost-saving and project improvement areas. Between the pay-offs and wide variety of applications, it is unsurprising that more firms are adopting the principles of VE in the design and construction phases of their projects. Many studies have been conducted on the invention of new tools for VE while others focused on the application aspect of VE in different engineering domains. This paper presents an overview of VE and its applications in the field of civil …

Investigation Of Anion And Cation Exchange Membranes For Enhancing Desalination And Power Generation In A Microbial Desalination Cell, Francisco Lopez Moruno

Civil Engineering ETDs

Microbial desalination cell (MDC) is a bioelectrochemical system capable of oxidizing organics, generating electricity and reducing the salinity content into the desalination chamber. In the first part of this study, quaternary ammonium poly(2,6-dimethyl 1,4-phenylene oxide) (QAPPO) anion exchange membranes (AEMs) with topographically patterned surfaces were assessed in a microbial desalination cell (MDC) system. The MDC results with these QAPPO AEMs were benchmarked against a commercially available AEM. The MDC with the non-patterned QAPPO AEM (Q1) displayed the best desalination rate (a reduction of salinity by 53±3 %) and power generation (189±5 mW m^-2) when compared against the commercially …

2018 Stryker Engineering Challenge-Andrews Students Win Second Place, Gunnar Lovhoiden

Andrews Agenda: Campus News

No abstract provided.

1980 - Department Of Water Resources Bulletin 118-80, Groundwater Basins In California

Water Statutes

A 1980 report to the California State Legislature describing 357 groundwater basins on the basis of geological and hydrological conditions with consideration of political boundary lines where practical. Noting that new groundwater management legislation was needed, the report was viewed as a basis for groundwater management.

Three Dimensional Direct Print Additively Manufactured High-Q Microwave Filters And Embedded Antennas, Derar Fayez Hawatmeh

USF Tampa Graduate Theses and Dissertations

The need for miniaturized, and high performance microwave devices has focused significant attention onto new fabrication technologies that can simultaneously achieve high performance and low manufacturing complexity. Additive manufacturing (AM) has proven its capability in fabricating high performance, compact and light weight microwave circuits and antennas, as well as the ability to achieve designs that are complicated to fabricate using other manufacturing approaches. Direct print additive manufacturing (DPAM) is an emerging AM process that combines the fused deposition modeling (FDM) of thermoplastics with micro-dispensing of conductive and insulating pastes. DPAM has the potential to jointly combine high performance and low …

Operational Impact Of Shadow Evacuation On Regional Road Networks During Short-Notice Emergency Evacuations, Efe Emre Tuncer

LSU Master's Theses

As part of evacuation planning, development of effective tactical and operational strategies are essential to safely and efficiently mobilize the public away from the threat. Evacuations are classified by the time between notification and the anticipated arrival of the threat which can be categorized as short, or no-notice emergencies. Emergencies involve the computation of the time required to evacuate the area of risk, which is the time to clear a radius of up to about 10-miles around the nuclear power plant, known as the emergency planning zone (EPZ). These evacuation time estimates (ETE) also account for the evacuation of the …