Engineering Commons^™

Simultaneous 3d Construction And Imaging Of Plant Cells Using Plasmonic Nanoprobe-Assisted Multimodal Nonlinear Optical Microscopy, Kun Liu, Yutian Lei, Dawei Li

Department of Civil and Environmental Engineering: Faculty Publications

Nonlinear optical (NLO) imaging has emerged as a promising plant cell imaging technique due to its large optical penetration, inherent 3D spatial resolution, and reduced photodamage; exogenous nanoprobes are usually needed for nonsignal target cell analysis. Here, we report in vivo, simultaneous 3D labeling and imaging of potato cell structures using plasmonic nanoprobe-assisted multimodal NLO microscopy. Experimental results show that the complete cell structure can be imaged via the combination of second-harmonic generation (SHG) and two-photon luminescence (TPL) when noble metal silver or gold ions are added. In contrast, without the noble metal ion solution, no NLO signals from the …

Simultaneous 3d Construction And Imaging Of Plant Cells Using Plasmonic Nanoprobe-Assisted Multimodal Nonlinear Optical Microscopy, Kun Liu, Yutian Lei, Dawei Li

Department of Civil and Environmental Engineering: Faculty Publications

Nonlinear optical (NLO) imaging has emerged as a promising plant cell imaging technique due to its large optical penetration, inherent 3D spatial resolution, and reduced photodamage; exogenous nanoprobes are usually needed for nonsignal target cell analysis. Here, we report in vivo, simultaneous 3D labeling and imaging of potato cell structures using plasmonic nanoprobe-assisted multimodal NLO microscopy. Experimental results show that the complete cell structure can be imaged via the combination of second-harmonic generation (SHG) and two-photon luminescence (TPL) when noble metal silver or gold ions are added. In contrast, without the noble metal ion solution, no NLO signals from the …

Sustainability Matchmaking: Exploration Into Using Excess Renewable Energy To Deliver ‘Free’ Energy To Fuel Poor Homes – A Preliminary Case Study In Ireland, Ciara Ahern, Ronan Oliver

Articles

The aggregated fuel cost of domestic hot water (DHW) generation in Ireland, in 2022, was €529M with associated emissions/load of 1.3MtCO₂/289GWh. The shadow price of carbon monetises the negative impact of emissions, rising with time; DHW generation has an associated shadow carbon cost of €13M in 2022, rising to €42M in 2030 and €335M in 2050.

In 2020, c12%/€441M of wind was curtailed or wasted as inter alia, there was no demand at times of high wind. Meanwhile, a ‘silent crisis’ is occurring in Ireland wherein one-in-two dwellings were considered in fuel poverty in 2022. Households in …

Common Ground Newsletter Fall 2023, Missouri University Of Science And Technology

Common Ground

- Free-Format Education

- S&T student selected as national ASCE ambassador

- Heart of a servant

- Exploring history, architecture of Chicago

Thermotolerance And Hydrogen Production Potential Of Salt-Tolerant Microflora From Salt Fields, Tsuyoshi Imai, Gede Adi Wiguna Sudiartha, Jantima Teeka, Prapaipid Chairattanamanokorn, Alissara Reungsang, Yung-Tse Hung

Civil and Environmental Engineering Faculty Publications

Upper mesophilic temperature acclimation of halophilic, hydrogen-producing bacteria from salt fields was investigated in this study, along with the changes in microbial abundance during anaerobic digestion (AD) process. Genomic approaches such as PCR-denaturing gradient gel electrophoresis (DGGE) and next-generation sequencing (NGS) were performed to profile the microbial communities. During AD, there was a significant abundance of Halanaerobacter lacunarum at 48°C followed by the increase in hydrogen yield, signifying potential contribution from the halophile in the hydrogen production. A decrease in the dominance of H. lacunarum and Halanaerobium fermentans at 42°C, likely due to an increase in other bacterial species, was …

Evaluation Of Digital Twin Approaches For Thermal Modeling And Energy Optimization For Existing Buildings, Jason Bastie Muermann

Theses and Dissertations

Residential, commercial, and industrial building sectors in the United States were responsible for 42% of the nation’s consumption of 100.2 quadrillion BTUs of energy in 2019 [1]. 80% of the nation’s energy is sourced from fossil fuels, including coal, natural gas, and petroleum. Fossil fuels are known contributors to carbon emissions and climate change, making energy reduction vital. Consequently, New Jersey Department of Military and Veterans Affairs (NJDMAVA) is tasked with evaluating energy consumption and efficiency in all New Jersey Army National Guard (NJARNG) facilities, as mandated by TAG Policy Letter 18-5, Executive Order 13990, and the Energy Independence and …

A New Empirical Law For The Prediction Of The Zero-Lift Pitching Moment Coefficient Of Swept And Tapered Wings, Mondher Yahyaoui

Journal of Aviation Technology and Engineering

A new empirical law for the prediction of the zero-lift pitching moment coefficient of trapezoidal wings with linear twist and constant taper and sweep in subsonic flow is introduced. This law is quite general in that it does not rely on the use of charts and spans the normal range of values of taper ratio, aspect ratio, and sweep for subsonic aircraft. It does not, however, accommodate different airfoils along the wingspan and only positive sweep has been considered. The empirical law was first derived for the incompressible regime and then an additional empirical law for the compressibility effect has …

Asset-Based Approaches To Multilingual Students’ Computer Science Identity Development, Sharin Rawhiya Jacob, Mark Warschauer

Journal of Computer Science Integration

While computer science identity development has been examined in several studies, there is much to learn about the development of multilingual students’ computer science (CS) identities. To develop strong CS identities, multilingual students must engage in culturally and linguistically sustaining curriculum, pedagogy, and interaction that draws from their rich and varied resources. This theoretical paper is grounded in a justice-centered, asset-based framework that views the traditions and practices in students’ cultures and communities as strong contributors to knowledge construction in STEM. We draw on multiple studies exploring multilingual student CS identity development to better understand how their personal, familial, community-based, …

Amélioration Du Confort Des Harnais De Sécurité Pour Le Secteur De La Construction Par L’Évaluation Des Contraintes Physiques Et Physiologiques, Bertrand Galy, Chantal Gauvin, Denis Marchand, Jean Arteau, Yves Beauchamp, Antoine Archambault, Guillaume Montpetit

Rapports de recherche scientifique

Les chutes au niveau inférieur sont parmi les 10 premières causes de lésions professionnelles sur la période 2010-2012 et représentent environ 5 000 lésions professionnelles par an, au Québec. Elles représentent également une cause importante de décès au travail (la troisième cause en 2019). La stratégie de protection contre les chutes de hauteur consiste dans un premier temps à éliminer le risque à la source : dans la mesure du possible, il faut éviter les travaux en hauteur. Si cela n’est pas possible, il faut empêcher la chute avec un garde-corps ou l’arrêter par une autre protection collective comme les …

Spin-Acoustic Control Of Silicon Vacancies In 4h Silicon Carbide, Jonathan R. Dietz, Boyang Jiang, Aaron M. Day, Sunil A. Bhave, Evelyn L. Hu

Purdue University Libraries Open Access Publishing Fund

Bulk acoustic resonators can be fabricated on the same substrate as other components and can operate at various frequencies with high quality factors. Mechanical dynamic metrology of these devices is challenging as the surface information available through laser Doppler vibrometry lacks information about the acoustic energy stored in the bulk of the resonator. Here we report the spin-acoustic control of naturally occurring negatively charged silicon monovacancies in a lateral overtone bulk acoustic resonator that is based on 4H silicon carbide. We show that acoustic driving can be used at room temperature to induce coherent population oscillations. Spin-acoustic resonance is shown …

High-Sensitivity Electronic Stark Spectrometer Featuring A Laser-Driven Light Source, J. S. Huff, K. M. Duncan, C. J. Van Galen, M. S. Barclay, W. B. Knowlton, B. Yurke, P. H. Davis, D. B. Turner, R. J. Stanley, R. D. Pensack

Materials Science and Engineering Faculty Publications and Presentations

We report developmental details of a high-sensitivity Stark absorption spectrometer featuring a laser-driven light source. The light source exhibits intensity fluctuations of ∼0.3% over timescales ranging from 1 min to 12 h, minimal drift (≤ 0.1%/h), and very little 1/f noise at frequencies greater than 200 Hz, which are comparable to or better than an arc-driven light source. Additional features of the spectrometer include balanced detection with multiplex sampling, which yielded lower noise in A, and constant wavelength or wavenumber (energy) spectral bandpass modes. We achieve noise amplitudes of ∼7 × 10⁻⁴ and ∼6 × 10^{−6 …}

Wind River Elementary Computer Science Collaborative: Connecting Computer Science And Indigenous Identities And Knowledges On The Wind River Reservation, Joseph P. Wilson, Kathryn M. Rich, Jared O'Leary, Veronica Miller

Journal of Computer Science Integration

Three Northern Arapaho and Eastern Shoshone–serving districts formed a researcher–practitioner partnership with the Wyoming Department of Education, the American Institutes for Research®, and BootUp Professional Development to advance the computer science (CS) education of their elementary students in ways that strengthen their Indigenous identities and knowledges. In this paper, we share experiences from 2019 to 2022 with our curriculum development, professional development (PD), and classroom implementation. The researcher–practitioner partnership developed student and teacher materials to support elementary CS lessons aligned to Wyoming’s CS standards and “Indian Education for All” social studies standards. Indigenous community members served as experts to codesign …

Ai Is Here. Here’S How New Mexicans Can Prepare, Sonia Gipson Rankin, Melanie E. Moses

Faculty Scholarship

Last December we asked the AI chatbot ChatGPT to solve a programming assignment given to computer science students at UNM. It wrote some Python code, but it generated an error. We gave the chatbot the error message and were astounded by how good its response was.

Exploring Science And Engineering Practices In Children’S Picture Books, Derrick A. Nero, Kathleen Everts Danielson

Michigan Reading Journal

This article features an annotated bibliography of children’s books that illustrate engineering concepts tied to the Next Generation Science Standards (NGSS) Science and Engineering Practices for K-2 students (National Science Teaching Association -NSTA, n.d., see Appendix A) and NGSS K-2 Engineering Design performance expectations (NSTA, n.d., see Appendix B). The selected children’s books encourage discussion and model the process of inquiry and problem solving that may inspire young children to explore STEM (Science, Technology, Engineering, and Mathematics) questions of their own.

Robotic Inspection Of Infrastructure Using Vision, Gpr, And Impact-Echo Sensors, Jizhong Xiao

INSPIRE Archived Webinars

Bridges, dams, highways, and tunnels in the U.S. are reaching their life expectancy, and thus have imperative needs for routine inspection and maintenance to ensure sustainability. It is reported that 42% of over 600,000 highway bridges in the National Bridge Inventory (NBI) have exceeded their design life of 50 years, and 42,951 bridges are rated in poor condition and classified as "structurally deficient". To inspect the structurally integrity of bridges, the inspectors also need to detect subsurface defects (i.e., delamination, voids) using NDE instruments such as GPR and impact-echo (IE) device at difficult to access components (i.e., pier, bottom side …

Dual Activation Of Peroxymonosulfate Using Mnfe2O4/G‑C3N4 And Visible Light For The Efficient Degradation Of Steroid Hormones: Performance, Mechanisms, And Environmental Impacts, Kitipong Poomipuen, Chainarong Sakulthaew, Chanat Chokejaroenrat, Athaphon Angkaew, Kanidrawee Techauay, Thapanee Poompoung, Kanokwan Teingtham, Piyaporn Phansak, Piyangkun Lueangjaroenkit, Daniel D. Snow

Daugherty Water for Food Global Institute: Faculty Publications

Single activation of peroxymonosulfate (PMS) in a homogeneous system is sometimes insufficient for producing reactive oxygen species (ROS) for water treatment applications. In this work, manganese spinel ferrite and graphitic carbon nitride (MnFe₂O₄/g-C₃N₄; MnF) were successfully used as an activator for PMS under visible light irradiation to remove the four-mostdetected- hormone-contaminated water under different environmental conditions. The incorporation of g-C₃N₄ in the nanocomposites led to material enhancements, including increased crystallinity, reduced particle agglomeration, amplified magnetism, improved recyclability, and increased active surface area, thereby facilitating the PMS activation and electron …

Social Vulnerability Of The People Exposed To Wildfires In U.S. West Coast States, Arash Modaresi Rad, John T. Abatzoglou, Erica Fleishman, Miranda H. Mockrin, Volker C. Radeloff, Yavar Pourmohamad, Megan Cattau, J. Michael Johnson, Philip Higuera, Nicholas J. Nauslar, Mojtaba Sadegh

Civil Engineering Faculty Publications and Presentations

Understanding of the vulnerability of populations exposed to wildfires is limited. We used an index from the U.S. Centers for Disease Control and Prevention to assess the social vulnerability of populations exposed to wildfire from 2000–2021 in California, Oregon, and Washington, which accounted for 90% of exposures in the western United States. The number of people exposed to fire from 2000–2010 to 2011–2021 increased substantially, with the largest increase, nearly 250%, for people with high social vulnerability. In Oregon and Washington, a higher percentage of exposed people were highly vulnerable (>40%) than in California (~8%). Increased social vulnerability of …

Vertical And Horizontal Stresses In Narrow Mechanically Stabilized Earth Retaining Walls, Jamal I. Kakarasul Al-Bajalan

Polytechnic Journal

Mechanically stabilized earth (MSE) walls have been increasingly used in civil engineering applications, such as highways, bridge abutments, and service roads. In certain areas, the width of the backfill for MSE wall construction is limited. According to the literature, the mechanism of MSE walls constructed in narrow backfill width differs from that with sufficient backfill width; hence the magnitude and distribution of stresses in MSE walls with limited backfill width are different. This study presented the vertical and horizontal stresses of two laboratory model tests of narrow MSE walls subjected to strip loading. The stresses measured in laboratory models were …

Barriers To Bim Implementation For Cost Management In The Irish Construction Industry, Uchenna Sampson Igwe Dr, Alan Hore Dr, Dermot Kehily Dr., David Colmenero Lechuga

Conference Papers

Building Information Modeling (BIM) is the foundation of digital transformation in the architecture, engineering, and construction (AEC) industry that enables efficient collaboration and information sharing among stakeholders in the industry. It has been identified as a powerful tool for construction cost management because it provides accurate and timely information about the cost implications of design decisions. BIM development in Ireland is expected to continue growing in the coming years, driven by the proposed 2024 government mandate, continued state supports and the benefits that BIM brings to the construction industry, including improved collaboration, reduced errors and waste, and increased efficiency. Notable …

An Investigation Into Ireland’S Bim Skills Gap, Guadalupe Centanni, Barry Mcauley

Conference Papers

The adoption of digital skills within the Irish AEC Sector has the potential to enhance efficiency and competitiveness among its stakeholders. Despite this opportunity, there is still a high demand for skilled BIM professionals, which cannot be currently met. To meet this skills demand and directly target future skills gaps within Ireland, several challenges must be addressed to facilitate broader BIM adoption. This paper focuses on addressing this gap by identifying steps to be followed to develop skilled professionals within BIM. This has been achieved by investigating the extent to which construction stakeholders in Ireland comprehend BIM and, examiningthe training …

Accelerating Bim Adoption In Ireland: A Ten-Year Review Of Cita Bim Gathering Proceedings, Alan Hore, Roger West, Barry Mcauley

Conference Papers

Digital construction interfaces have been studied extensively over the last few decades, with an ever-grow- ing catalogue of publications. The CitA BIM Gathering conferences have played a key role in bringing together the research and industry communities ina collaborative setting over the past decade in Ireland. In this paper the authors systematically review 10 years of papers published in the BIM Gathering pro- ceedings since the inaugural conference in 2013. A total of 175 papers involving over 200 authors have been reviewed and classified under the 2018 World Economic Forum (WEF) recommendations in respect to ac- celerating BIM adoption. The …

The Development Of A Lean Digital Construction (Bim) Innovation Framework For Irish Construction Smes, Marina Andreou, Barry Mcauley, Alan Hore

Conference Papers

The adoption of Building Information Modelling (BIM) within small and medium-sized enterprises (SMEs) must overcome several challenges to succeed. Potential barriers include the need for financial resources, correct BIM guidance, and training. In recent years, SME organisations have investigated how the complementary application of BIM and Lean principles can maximise digital construction practices. For this approach to be successful, structured guidance is paramount. This paper presents the results from an extensive literature review that explores BIM and Lean capabilities, focusing on synergies and existing frameworks. Based on the results from the literature review, the paper suggests an experimental framework that …

The Discovery, Characterization, And Engineering Of Autolytic Enzymes As Antimicrobials, Jacob M. Furlon

Dartmouth College Ph.D Dissertations

In an age of rising levels of antibiotic resistance, we are quickly running out of tools to address some of the most virulent and widespread infectious bacteria. One group of enzymes that show significant potential for use as next-generation antibiotics are antimicrobial peptidoglycan hydrolases, often referred to as lysins. These enzymes are responsible for the breakdown of peptidoglycan within the bacterial cell wall, and, when exogenously applied, can result in dramatic destabilization of the cell wall leading to rapid lysis of the bacteria. While phage endolysins have been widely investigated as potential antimicrobials, the therapeutic potential of endogenous autolysins from …

Conduction Mechanism Switching From Coulomb Blockade To Classical Critical Percolation Behavior In Disordered Nanoparticle Array, Abhijeet Prasad, Jay Min Lim, Ravi Saraf

Department of Chemical and Biomolecular Engineering: Faculty Publications

Large, open-gate transistors made from metal nanoparticle arrays offer possibilities to build new electronic devices, such as sensors. A nanoparticle necklace network (N³) of Au particles from 300 K to cryogenic temperatures exhibit a nonohmic I–V_d behavior, I ≈ (V_d–V_T)^𝜻, where V_T is a conduction gap and 𝜻 is a constant critical exponent. The conduction gap in N³, made from disordered networks of 1D chains of 10 nm diameter Au particles exhibits room temperature (RT) gating. Although the I–V_d behavior at RT is identical to Coulomb blockade, …

An Applied Study Of Recycle Waste Application In The External Walls To Improve The Thermal Performance Of The Average Housing Units In Egypt, Christena Kamal Hannaa, Abdel-Monteleb Mohamed Aly, Sayed Shebl Mohamed Shebl, Amr Sayed Hassan Abdallah

Mansoura Engineering Journal

This study examines the importance of using recycled waste in building materials in order to reduce energy consumption and improve the environmental impact of housing projects. The study focuses on the possibility of using recycled waste in building bricks for external walls as one of the building envelope elements in average housing projects in Egypt. Waste such as limestone, polystyrene and rice ashes were used in compressed cement bricks for the external walls to study the effect on thermal conductivity, thermal comfort and energy consumption using a simulation program (Design Builder). The laboratory results found that the use of recycled …

Industry Colloquium Report, Robert Moore

Reports

In the ever-evolving landscape of the construction industry, digital transformation has emerged as a pivotal force reshaping the way projects are conceived, executed, and delivered. This transformation, fuelled by cutting-edge technology and innovative practices, holds the promise of greater efficiency, sustainability, and collaboration within the construction sector.

This report offers a comprehensive summary of the Build Digital Project colloquium. It provides actionable insights and recommendations for clients, supply chain partners, and for prioritisation within the Build Digital Project pillars. As the industry partners seek to build a more efficient, sustainable, and collaborative construction sector, understanding and harnessing the invaluable insights …

Microfluidic Device And Method Using Double Anodic Bonding, Diane Peters, Stephen Forest, Gregory Mcgraw, Siddharth Harikrishna Mohan

Mechanical Engineering Patents

A microfluidic device for use with a microfluidic delivery system, such as an organic vapor jet printing device, includes a glass layer that is directly bonded to a microfabricated die and a metal plate via a double anodic bond. The double anodic bond is formed by forming a first anodic bond at an interface of the microfabricated die and the glass layer, and forming a second anodic bond at an interface of the metal plate and the glass layer, where the second anodic bond is formed using a voltage that is lower than the voltage used to form the first …

A Novel Approach For Enhancing Routing In Wireless Sensor Networks Using Aco Algorithm, Sihem Goumiri, Maohamed Amine Riahla, M'Hamed Hamadouche

Emirates Journal for Engineering Research

Wireless Sensors Network (WSN) is an emergent technology that aims to offer innovative capacities. In the last decade, the use of these networks increased in various fields like military, science, and health due to their fast and inexpressive deployment and installation. However, the limited sensor battery lifetime poses many technical challenges and affects essential services like routing. This issue is a hot topic of search, many researchers have proposed various routing protocols aimed at reducing the energy consumption in WSNs. The focus of this work is to investigate the effectiveness of integrating ACO algorithm with routing protocols in WSNs. Moreover, …

Influencing Air Force Logisticians' Information Seeking During The Covid-19 Pandemic: The Role Of Organizational Meetings In An Expanded Prism Framework, Matthew D. Roberts, Christopher T. Price, Seong-Jong Joo

Faculty Publications

Purpose: This research aims to understand how organizational workplace meetings surrounding the COVID-19 pandemic impacted logistics Airmen across the United States Air Force and how these meetings impacted their risk seeking behavior on social media.

Design/methodology/approach: This survey research tested an extended Planned Risk Information Risk Seeking Model (PRISM) with organizational meetings as an antecedent to determine if current meetings influenced an Airman's perceived behavioral control, attitude toward seeking, subjective norms, knowledge sufficiency and intention to seek information regarding COVID-19.

Findings: Results of the CFA showed that the expanded PRISM model had good model fit. Additionally, using …

Laser-Direct-Drive Fusion Target Design With A High-Z Gradient-Density Pusher Shell, S. S. Hu, L. Ceurvorst, J. L. Peebles, A. Mao, P. Li, Yongfeng Lu, A. Shvydky, V. N. Goncharov, R. Epstein, K. A. Nichols, R. M. N. Goshadze, M. Ghosh, J. Hinz, V. V. Karasiev, S. Zhang, N. R. Shaffer, D. I. Mihaylov, J. Cappelletti, D. R. Harding, C. K. Li, E. M. Campbell, R. C. Shah, T. J. B. Collins, S. P. Regan, C. Deeney

Department of Electrical and Computer Engineering: Faculty Publications

Laser-direct-drive fusion target designs with solid deuterium-tritium (DT) fuel, a high-Z gradient-density pusher shell (GDPS), and a Au-coated foam layer have been investigated through both 1D and 2D radiationhydrodynamic simulations. Compared with conventional low-Z ablators and DT-push-on-DT targets, these GDPS targets possess certain advantages of being instability-resistant implosions that can be high adiabat (α ≽ 8) and low hot-spot and pusher-shell convergence (CR_hs ≈22 and CR_PS ≈17), and have a low implosion velocity (v_imp < 3 × 10⁷ cm/s). Using symmetric drive with laser energies of 1.9 to 2.5 MJ, 1D LILAC simulations of these GDPS implosions can result …