Engineering Commons^™

Santa Clara Magazine, Volume 60 Number 3, Summer 2019, Santa Clara University

Santa Clara Magazine

16 - PROTECTING THE HEART To grow the campus, we must care for the thing unchanging at its center—its Mission. Take a journey through the restoration of Mission Santa Clara de Asís. By Lander Eicholzer ’19.

22 - A LOBBY FOR JUSTICE What do you do when it is impossible for the innocent to prove their innocence? Change the law. The Northern California Innocence Project teamed up with state lawmakers and others to do just that. By Deborah Lohse.

26 - FINDING CENTER Outgoing Frank Sinatra Chair in the Performing Arts Taye Diggs reflects on celebrating who are you, where …

Keeping Your Distance: The Science Of Turns-Around-A-Point And Ground Reference Maneuvers, Nihad E. Daidzic

Aviation Department Publications

Ground reference maneuvers are more important than you may think. Frequently regarded as unimportant or boring, ground reference maneuver training is often limited to a few minutes of flight instructor demonstration and brief student practice.

The Blue Emission At 2.8 Ev In Strontium Titanate: Evidence For A Radiative Transition Of Self-Trapped Excitons From Unbound States, Miguel L. Crespillo, Joseph T. Graham, Fernando Agullo-Lopez, Y. Zhang, William J. Weber

Nuclear Engineering and Radiation Science Faculty Research & Creative Works

The origin of the blue emission in SrTiO₃ has been investigated as a function of irradiation fluence, electronic excitation density, and temperature using a range of ion energies and masses. The emission clearly does not show correlation with the concentration of vacancies generated by irradiation but is greatly enhanced under heavy-ion irradiation. The intensity ratio of the 2.8 and 2.5 eV bands is independent of fluence at all temperatures, but it increases with excitation rate. The 2.8 eV emission is proposed to correspond to a transition from conduction band states to the ground state level of the self-trapped exciton …

Inspire E-News 07/08 2019, College Of Engineering And Applied Sciences

College of Engineering and Applied Sciences News

• Sunseeker team engineers their way to impressive finish at Formula Sun Grand Prix
• Student saves middle school's robotics season
• From mechanical engineering student to entrepreneur
• Metal casting: A different type of summer camp
• Faculty members receive honors, present paper
• NASA internships have alumnus reaching for the stars
• It starts with an egg drop: Students teach refugee children about science, math
• CEAS receives $40,000 grant from DENSO
• Students win Michigan Space Forum poster competition
• Student's logo design deemed one of the best
• Professor guides high school students to engineering competition wins

Design Of Experiment Methods In High Speed Signal Via Transition In Printed Circuit Board, Amir A. Asif

Publications

With increase in data transfer speeds between integrated circuits, memories and connectors, the interconnects in printed circuit boards require careful design and optimization. A critical part of an interconnect is via transition. To meet the design goals and maintain signal integrity, every part of the interconnect needs to be carefully designed. Designing via involves variation of several parameters and it is extremely important to understand their contribution to find the usable parameters yielding best possible performance. Out of these numerous combinations of parameters, Design of Experiments (DOE) can offer much needed understanding, suggest possible values and speed up the design …

Manipulating Fiber Orientation For The Reduction Of Warpage In Carbon Fiber Composite Sandwich Panels, Landon Burnley, Gabrielle Correia

Materials Engineering

Safran Cabin (Santa Maria, CA), previously known as Zodiac Aerospace, designs and manufactures interior cabin components for private and commercial aircraft. Carbon fiber face sheets have recently been incorporated in their overhead luggage bin assemblies which utilize a composite sandwich panel design, in order to provide additional stiffness to the previous glass fiber sandwich panels. Since the introduction of carbon fiber in these luggage bin panels, Safran has experienced an increase in warpage during manufacturing. When inspected by quality control, the panels are tested mimicking how they are installed in aircraft. If the panels do not meet specifications, the warped …

Notes On The Economics Of Residential Hybrid Energy System, Mahelet G. Fikru, Gregory M. Gelles, Ana M. Ichim, Joseph D. Smith

Economics Faculty Research & Creative Works

Despite advances in small-scale hybrid renewable energy technologies, there are limited economic frameworks that model the different decisions made by a residential hybrid system owner. We present a comprehensive review of studies that examine the techno-economic feasibility of small-scale hybrid energy systems, and we find that the most common approach is to compare the annualized life-time costs to the expected energy output and choose the system with the lowest cost per output. While practical, this type of benefit—cost analysis misses out on other production and consumption decisions that are simultaneously made when adopting a hybrid energy system. In this paper, …

Community Involvement And Leadership In Nonmetropolitan Nebraska: Rural Poll Research Report 19-1, Rebecca Vogt, Cheryl A. Burkhart-Kriesel, Randolph Cantrell, Bradley Lubben, L. J. Mcelravy, Timothy Meyer, Jason L. Weigle

Rural Futures Institute: Publications

Community leadership and involvement are important parts of community development. Rural communities rely on volunteers for many community development activities as well as local leadership positions. In smaller communities in particular, community members often take on multiple roles. Given these challenges, how involved are rural Nebraskans in community and political activities? How do they feel about the leadership in their community? How often do they have social interactions with others during a typical month? This paper provides a detailed analysis of these questions. This report details 1,776 responses to the 2019 Nebraska Rural Poll, the 24th annual effort to understand …

Modeling The Interplay Between Photosynthesis, Co2 Fixation, And The Quinone Pool In A Purple Non-Sulfur Bacterium, Adil Alsiyabi

Department of Chemical and Biomolecular Engineering: Dissertations, Theses, and Student Research

Rhodopseudomonas palustris CGA009 is a purple non-sulfur bacterium (PNSB) that can fix CO₂ and nitrogen or break down organic compounds for its carbon and nitrogen requirements. Light, inorganic, and organic compounds can all be used for its source of energy. Excess electrons produced during its metabolic processes can be exploited to produce hydrogen gas or biodegradable polyesters (polyhydroxybutyrate). A genome-scale metabolic model of the bacterium was reconstructed to study the interactions between photosynthesis, carbon dioxide fixation, and the redox state of the quinone pool. A comparison of model-predicted flux values with published in vivo MFA fluxes resulted in predicted …

Decision Support For Smart Manufacturing, Mahdi Fathi, Marzieh Khakifirooz, Panos M. Pardalos, Daniel J. Power

BCoE Publications

A post-industrial revolution is encouraging the deployment of novel concepts both for designing smart factories and for creating a new generation of monitoring, control and man-machine collaboration systems. In general, companies are embracing an era of smart manufacturing built upon Cyber Physical Systems (CPS), the Internet of Things (IoT), and Cloud and Cognitive computing. Using digital technologies with advanced manufacturing tools can provide opportunities for building smart decision support systems (DSS) to improve manufacturing analysis, monitoring, output, and performance. Despite the potential of improved Decision Support Systems (DSS), the major challenge is successfully adapting smart manufacturing processes to use new …

Ambient-Intelligent Decision Support System For Smart Manufacturing, Mahdi Fathi, Marzieh Khakifirooz, Yiannis Ampatzidis, Panos M. Pardalos

BCoE Publications

Ambient Intelligence (AmI) refers to a networked environment of computing devices for implementing a "smart" system. AmI is built using sensors and actuators connected through real-time networks. The data and signals captured from sensors are ambiguous for both human and machine. Artificial Intelligence (AI) is merged into an ambient environment to translate data and signals into a language understandable by human users and can help transform an operational setting from machine-centered to human-centered. However, the implementation of AI technology into an ambient environment requires quantitative modeling approaches to emphasize system requirements analysis and more detailed design specifications. This article tries …

Improving 3d Printed Prosthetics With Sensors And Motors, Rachel Zarin

Honors Projects

A 3D printed hand and arm prosthetic was created from the idea of adding bionic elements while keeping the cost low. It was designed based on existing models, desired functions, and materials available. A tilt sensor keeps the hand level, two motors move the wrist in two different directions, a limit switch signals the fingers to open and close, and another motor helps open and close the fingers. All sensors and motors were built on a circuit board, programmed using an Arduino, and powered by a battery. Other supporting materials include metal brackets, screws, guitar strings, elastic bands, small clamps, …

Interchangeable All Fiber-Based Passive Voa/Voc System, Andrei Statchevschi

Publications and Research

A passive interchangeable variable optical coupler and attenuator system is demonstrated. A maximum coupling ratio of 99.94/0.06 and attenuation of up to 30 dB were achieved respectively.

Nonpolar Gan-Based Vcsels With Lattice-Matched Nanoporous Distributed Bragg Reflector Mirrors, Saadat M. Mishkat-Ul-Masabih

Electrical and Computer Engineering ETDs

Wide-bandgap optoelectronic devices have undergone significant advancements with the advent of commercial light-emitting diodes and edge-emitting lasers in the violet-blue spectral region. They are now ubiquitous in several lighting, communication, data storage, display, and sensing applications. Among the III-nitride emitters, vertical-cavity surface-emitting lasers (VCSELs) have attracted significant attention in recent years due to their inherent advantages over edge-emitting lasers. The small active volume enables single-mode operation with low threshold currents and high modulation bandwidths. Their surface-normal device geometry is conducive to the cost-effective formation of high-density 2D arrays while simplifying on-chip wafer testing. Furthermore, the low beam divergence and circular …

Remembering Professor Emeritus Wynn R. Walker | College Of Engineering, Utah State University

College of Engineering News

Wynn Walker, a USU Civil and Environmental Engineering Professor Emeritus and former associate dean for the College of Engineering, died Saturday, June 29.

Development Of A Simplified Performance-Based Procedure For Assessment Of Post-Liquefaction Settlement Using The Cone Penetration Test, Jingwen He

Theses and Dissertations

Earthquake-induced liquefaction can cause severe damage to infrastructure is a serious concern in civil engineering practice. Post-liquefaction settlement is one of the common effects of liquefaction. The ability to predict and quantify post-liquefaction free-field settlement is a crucial part of seismic design. Many approaches have been developed during the past 50 years to perform liquefaction hazard analysis. The performance-based earthquake engineering (PBEE) framework developed by the Pacific Earthquake Engineering Research (PEER) center is a probabilistic framework that can provide a more accurate and complete seismic hazard analysis than other traditional methods. However, the PBEE framework is not widely used in …

Aviation Weather Products In General Aviation : Interpretability And Usability Research Trends, Jacqueline Mcsorley, Jayde King, Beth Blickensderfer

General Aviation Weather Display Interpretation

• Introduction
• Current Study
• Trends
• Summary
• Conclusion

Evaluating Volumetric Strain As A Predictor Of Yield And Peak Strength For The Multistage Triaxial Test: A Case Study With Utah Coal Specimens, Emmanuel Orilogi

Graduate Theses & Non-Theses

Failure envelopes used to characterize the shear strength of geological materials are generally obtained through conventional triaxial testing of multiple specimens and most of the specimens are heterogonous and expensive to obtain. Therefore, the multistage triaxial test was introduced to make use of a single specimen for material strength characterization, compared to the conventional triaxial test that requires at least three specimens. In the multistage triaxial test, the challenge to obtaining meaningful data is identifying when to terminate each loading stage. The goal is to be as close to the peak strength of the material but below the stress threshold …

Investigation Of The Toppling Of Rectangular Rigid Blocks Using A Shake Table And Distinct Element Models, Sara Magallon

Graduate Theses & Non-Theses

Understanding the engineering principles of failure modes in rock formations from seismic activity continues to be a challenging problem for engineers and geologists. The complexity of the geology, geometry, discontinuities, and earthquake ground motions contribute to the difficulty in estimating the stability of rock slopes. In this study, one classic rock slope failure mode is examined: the toppling behavior of a single rigid rectangular block under dynamic loading. An investigation employing experimental and numerical modeling techniques was performed to observe the response of wooden blocks with different aspect (width/height) ratios subjected to loading at the base and compared to established …

Enhancing The Efficiency Of Electrokinetic Remediation Through The Use Of Complexing Agents, Timothy Driscoll

Graduate Theses & Non-Theses

Electrokinetic remediation was accessed as a viable remediation technology for heavy metal contamination modeled after contamination present in Butte, MT caused by over a century of hard rock mining. The remediation technology was assessed at a laboratory scale using copper sulfate (CuSO₄) as a model compound of mine tailing contamination, and an artificial soil to control for variables outside the scope of work. This thesis designed a laboratory scale experiment that produced consistent results and could be easily repeated. The system design also included a method for managing the waste material produced during experiments. Following the experimental design, …

Mineralogy And Fluid Inclusion Study Of The Crystal Mountain Fluorite Mine, Ravalli County, Montana, Francis Grondin

Graduate Theses & Non-Theses

The Crystal Mountain Fluorite Mine, known for its vast amounts of massively grown fluorite and rare accessory minerals including fergusonite (YNbO₄) and thortveitite (Sc₂Si₂O₇), is located in the Sapphire Mountains 22 km east of the town of Darby, Montana. This site has been mined previously between the years of 1954 through 1973. The Taber collection of drill core, thin sections, mine maps and miscellaneous reports on Crystal Mountain was recently donated to the Montana Bureau of Mines and Geology for future studies. The purpose of the present study has been to use …

Downhole Rf Communication: Characterization And Modeling Of Waveguide Propagation In A Fluid-Filled Drill Pipe, Patrick Cote

Graduate Theses & Non-Theses

Current technologies for downhole communication in oil and gas drilling applications are severely limited in data rate and latency. This work proposes that a system based upon guided wave propagation could be designed to utilize a wireless, radio frequency (RF) signal to yield tens of megabits per second of data transfer. To determine the feasibility of the proposed system, a test setup was built to measure attenuation of RF signals transmitted through a pipe filled with various drilling fluids. A finite element analysis model was also built to further investigate waveguide propagation of electromagnetic signals in a fluid filled pipe. …

Maquiladoras In Central America: An Analysis Of Workforce Schedule, Productivity And Fatigue., Jose L. Barahona

Masters Theses & Specialist Projects

Textile factories or Maquiladoras are very abundant and predominant in Central American economies. However, they all do not have the same standardized work schedule or routines. Most of the Maquiladoras only follow schedules and regulations established by the current labor laws without taking into consideration many variables within their organization that could affect their overall performance. As a result, the purpose of the study is to analyze the current working structure of a textile Maquiladora and determine the most suitable schedule that will abide with the current working structure but also increase production levels, employee morale and decrease employee fatigue. …

"Kompaktabiliteti Elektroenergjetik Kosovë-Shqipëri ", Adi Vokshi

Theses and Dissertations

Siç e dimë energjia elektrike është e nevojshme në të gjithë sektorët. Kjo shkakton kërkesë të madhe për energji elektrike edhe në Kosovë dhe Shqipëri.

Qëllimi i këtij punimi ështe që të analizohet prodhimi i energjisë elektrike në të dy vendet pasiqë ka mendime se një bashkim energjetik do të përmbushte këkesat për energji elektrike të të dy shteteve.

Por si është e mundur kjo?

Siç e dimë Kosova 97% të energjisë elektrike e prodhon nga termocentralet dhe ky është prodhim stabil 24/7. Ndërsa shqipëria 97% të energjisë e prodhon nga energjia hidrike, dhe kryesisht prodhimi me i madh arrihet …

Kontrollimi I Uljeve Dhe Plasaritjeve Në Traun Nga Betoni I Armuar Sipas Eurokodit 2 (Ec-2), Arxhent Jakupi

Theses and Dissertations

Situata e projektimit nga e cila mund t'a vërtetojmë se struktura jonë do të jetë e sigurtë nga veprimet e forcave është ajo e Gjendjes Kufitare të Shfrytëzimit. Në bazë të saj përcaktohet niveli i sigurisë së strukturës, nga e cila mund të mvaret edhe jetëgjatësia e saj. E gjitha kjo duhet bëhet që së paku struktura të qëndrojë e pamvarur duke mos pasur nevojë për intervenime pas një kohe jo të gjatë nga ndërtimi, të shfrytëzohet maksimalisht dhe duke mos shkaktuar pasoja në të ardhmen në njerëz apo qfarëdo qofshin ato.

Ky material mbulon gjendjet kufitare të përgjithëshme të …

Materialet Hidroizoluese, Arian Sadiku

Theses and Dissertations

Në këtë temë do të flasim për materialet hidroizoluese, në veçanti për llojet dhe karakteristikat e materialeve hidroizoluese me bazë polimere dhe të dhënat për materialet hidroizoluese. Janë përshkruar llojet dhe karakteristikat e materialeve si fizikia ndërtimore, rezistenca ndaj zjarrit, membrana hidroizoluese PVC, drenazhimi sipërfaqësor.

Një nga aplikimet më të rëndësishme në një ndërtim është hidroizolimi. Hidroizolimi përmirëson qëndrueshmërinë e shumë sipërfaqeve të ndryshme në ndërtim. Për më tepër, materialet hidroizoluese duhet të aplikohen në mënyrë që të sigurohet komoditeti i shtëpisë ose zyrës që do të përdoret pasi të përfundojë ndërtimi.

Hidroizolimi në ndërtesa është formimi i një pengese …

Relationship Between Ischemic Stroke And Pulse Rate Variability As A Surrogate Of Heart Rate Variability, Ajay K. Verma, Parshuram M. Aarotale, Parastoo Dehkordi, Jau-Shin Lou, Kouhyar Tavakolian

Electrical Engineering Faculty Publications

Autonomic reflex ascertains cardiovascular homeostasis during standing. Impaired autonomic reflex could lead to dizziness and falls while standing; this is prevalent in stroke survivors. Pulse rate variability (PRV) has been utilized in the literature in lieu of heart rate variability (HRV) for ambulatory and portable monitoring of autonomic reflex predominantly in young, healthy individuals. Here, we compared the PRV with gold standard HRV for monitoring autonomic reflex in ischemic stroke survivors. Continuous blood pressure and electrocardiography were acquired from ischemic stroke survivors (64 ± 1 years) and age-matched controls (65 ± 2 years) during a 10-minute sit-to-stand test. Beat-by-beat heart …

Rapid Repair Of Bridge Decks In Cold Weather, Abheetha Peiris, Issam E. Harik

Kentucky Transportation Center Research Report

Using regular concrete or mortar to repair potholes in concrete bridge decks is typically infeasible in cold weather due to extended set and curing times. However, several commercially available rapid-set repair materials can be used at temperatures near or below freezing. This study evaluated five such materials to assess their properties and determine which are most suited to executing pothole repairs in cold weather. For each material, laboratory testing evaluated set times, compressive strength gains, and bond strength to existing concrete at three temperatures: 35°F, 15°F, and 0°F (1.7°C, -9.4°C, and -17.8°C, respectively). Testing identified Phoscrete as the repair material …

Edge Drain Performance, Kean H. Ashurst Jr., Brad W. Rister

Kentucky Transportation Center Research Report

Edge drain systems are used on new highway construction projects and rehabilitation projects to reduce the moisture content of the pavement block and subgrade. Maintaining dry conditions in and around these components increases the subgrade strength and extends a pavement’s surface life. Edge drain systems can only operate effectively, however, if the entire subsurface drainage system functions properly. While many studies have demonstrated the benefits of edge drain systems, no comprehensive investigation of their performance has been undertaken in the state of Kentucky in over 20 years. After the Kentucky Transportation Cabinet (KYTC) identified problems with an edge drainage system …

Measuring Congestion For Strategic Highway Investment For Tomorrow (Shift) Implementation (Pl-32), Mei Chen, Xu Zhang, Fahmida Rahman, Jacob Brashear, Reginald R. Souleyrette

Kentucky Transportation Center Research Report

The Kentucky Transportation Cabinet (KYTC) has moved toward a data-driven decision-making process, the Strategic Highway Investment Formula for Tomorrow (SHIFT), to allocate funds for highway improvement projects. SHIFT requires that candidate projects be scored on five critical metrics: safety, asset management, congestion, economic growth, and benefit/cost analysis.

The measure of congestion used in SHIFT 2018 was a combination of volume-to-service flow ratio (VSF) and design hourly volume (DHV). VSF is a traditional performance measure developed based on limited data, primarily for sketch planning purposes. However, it does not accurately reflect the dynamics of traffic congestion of many facilities.

This report …