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Articles 541 - 570 of 2631
Full-Text Articles in Engineering
Modular Open-Source Design Of Pyrolysis Reactor Monitoring And Control Electronics, Finn K. Hafting, Daniel G. Kulas, Etienne Michels, Sarvada Chipkar, Stefan Wisniewski, David Shonnard, Joshua M. Pearce
Modular Open-Source Design Of Pyrolysis Reactor Monitoring And Control Electronics, Finn K. Hafting, Daniel G. Kulas, Etienne Michels, Sarvada Chipkar, Stefan Wisniewski, David Shonnard, Joshua M. Pearce
Michigan Tech Publications
Industrial pilot projects often rely on proprietary and expensive electronic hardware to control and monitor experiments. This raises costs and retards innovation. Open-source hardware tools exist for implementing these processes individually; however, they are not easily integrated with other designs. The Broadly Reconfigurable and Expandable Automation Device (BREAD) is a framework that provides many open-source devices which can be connected to create more complex data acquisition and control systems. This article explores the feasibility of using BREAD plug-and-play open hardware to quickly design and test monitoring and control electronics for an industrial materials processing prototype pyrolysis reactor. Generally, pilot-scale pyrolysis …
Modification Strategies For Development Of 2d Material-Based Electrocatalysts For Alcohol Oxidation Reaction, Haichang Fu, Zhangxin Chen, Xiaohe Chen, Fan Jing, Hua Yu, Dan Chen, Binbin Yu, Yun Hang Hu, Yanxian Jin
Modification Strategies For Development Of 2d Material-Based Electrocatalysts For Alcohol Oxidation Reaction, Haichang Fu, Zhangxin Chen, Xiaohe Chen, Fan Jing, Hua Yu, Dan Chen, Binbin Yu, Yun Hang Hu, Yanxian Jin
Michigan Tech Publications
2D materials, such as graphene, MXenes (metal carbides and nitrides), graphdiyne (GDY), layered double hydroxides, and black phosphorus, are widely used as electrocatalyst supports for alcohol oxidation reactions (AORs) owing to their large surface area and unique 2D charge transport channels. Furthermore, the development of highly efficient electrocatalysts for AORs via tuning the structure of 2D support materials has recently become a hot area. This article provides a critical review on modification strategies to develop 2D material-based electrocatalysts for AOR. First, the principles and influencing factors of electrocatalytic oxidation of alcohols (such as methanol and ethanol) are introduced. Second, surface …
Modification Strategies For Development Of 2d Material-Based Electrocatalysts For Alcohol Oxidation Reaction, Haichang Fu, Zhangxin Chen, Xiaohe Chen, Fan Jing, Hua Yu, Dan Chen, Binbin Yu, Yun Hang Hu, Yanxian Jin
Modification Strategies For Development Of 2d Material-Based Electrocatalysts For Alcohol Oxidation Reaction, Haichang Fu, Zhangxin Chen, Xiaohe Chen, Fan Jing, Hua Yu, Dan Chen, Binbin Yu, Yun Hang Hu, Yanxian Jin
Michigan Tech Publications
2D materials, such as graphene, MXenes (metal carbides and nitrides), graphdiyne (GDY), layered double hydroxides, and black phosphorus, are widely used as electrocatalyst supports for alcohol oxidation reactions (AORs) owing to their large surface area and unique 2D charge transport channels. Furthermore, the development of highly efficient electrocatalysts for AORs via tuning the structure of 2D support materials has recently become a hot area. This article provides a critical review on modification strategies to develop 2D material-based electrocatalysts for AOR. First, the principles and influencing factors of electrocatalytic oxidation of alcohols (such as methanol and ethanol) are introduced. Second, surface …
Perfusability And Immunogenicity Of Implantable Pre-Vascularized Tissues Recapitulating Features Of Native Capillary Network, Dhavan Sharma, Archita Sharma, Linghao Hu, Te An Chen, Sarah Voon, Kayla J. Bayless, Jeremy Goldman, Alex J. Walsh, Feng Zhao
Perfusability And Immunogenicity Of Implantable Pre-Vascularized Tissues Recapitulating Features Of Native Capillary Network, Dhavan Sharma, Archita Sharma, Linghao Hu, Te An Chen, Sarah Voon, Kayla J. Bayless, Jeremy Goldman, Alex J. Walsh, Feng Zhao
Michigan Tech Publications
Vascularization is a key pre-requisite to engineered anatomical scale three dimensional (3-D) constructs to ensure their nutrient and oxygen supply upon implantation. Presently, engineered pre-vascularized 3-D tissues are limited to only micro-scale hydrogels, which meet neither the anatomical scale needs nor the complexity of natural extracellular matrix (ECM) environments. Anatomical scale perfusable constructs are critically needed for translational applications. To overcome this challenge, we previously developed pre-vascularized ECM sheets with long and oriented dense microvascular networks. The present study further evaluated the patency, perfusability and innate immune response toward these pre-vascularized constructs. Macrophage-co-cultured pre-vascularized constructs were evaluated in vitro to …
Finding Ideal Parameters For Recycled Material Fused Particle Fabrication-Based 3d Printing Using An Open Source Software Implementation Of Particle Swarm Optimization, Shane Oberloier, Nicholas G. Whisman, Joshua M. Pearce
Finding Ideal Parameters For Recycled Material Fused Particle Fabrication-Based 3d Printing Using An Open Source Software Implementation Of Particle Swarm Optimization, Shane Oberloier, Nicholas G. Whisman, Joshua M. Pearce
Michigan Tech Publications
As additive manufacturing rapidly expands the number of materials including waste plastics and composites, there is an urgent need to reduce the experimental time needed to identify optimized printing parameters for novel materials. Computational intelligence (CI) in general and particle swarm optimization (PSO) algorithms in particular have been shown to accelerate finding optimal printing parameters. Unfortunately, the implementation of CI has been prohibitively complex for noncomputer scientists. To overcome these limitations, this article develops, tests, and validates PSO Experimenter, an easy-to-use open-source platform based around the PSO algorithm and applies it to optimizing recycled materials. Specifically, PSO Experimenter is used …
Rapid Saline Permafrost Thaw Below A Shallow Thermokarst Lake In Arctic Alaska, Benjamin M. Jones, Mikhail Z. Kanevskiy, Andrew D. Parsekian, Helena Bergstedt, Melissa K. Ward Jones, Rodrigo C. Rangel, Kenneth M Hinkel, Yuri Shur
Rapid Saline Permafrost Thaw Below A Shallow Thermokarst Lake In Arctic Alaska, Benjamin M. Jones, Mikhail Z. Kanevskiy, Andrew D. Parsekian, Helena Bergstedt, Melissa K. Ward Jones, Rodrigo C. Rangel, Kenneth M Hinkel, Yuri Shur
Michigan Tech Publications
Permafrost warming and degradation is well documented across the Arctic. However, observation- and model-based studies typically consider thaw to occur at 0°C, neglecting the widespread occurrence of saline permafrost in coastal plain regions. In this study, we document rapid saline permafrost thaw below a shallow arctic lake. Over the 15-year period, the lakebed subsided by 0.6 m as ice-rich, saline permafrost thawed. Repeat transient electromagnetic measurements show that near-surface bulk sediment electrical conductivity increased by 198% between 2016 and 2022. Analysis of wintertime Synthetic Aperture Radar satellite imagery indicates a transition from a bedfast to a floating ice lake with …
Encoder–Decoder With Pyramid Region Attention For Pixel-Level Pavement Crack Recognition, Hui Yao, Yanhao Liu, Haotian Lv, Ju Huyan, Zhanping You, Yue Hou
Encoder–Decoder With Pyramid Region Attention For Pixel-Level Pavement Crack Recognition, Hui Yao, Yanhao Liu, Haotian Lv, Ju Huyan, Zhanping You, Yue Hou
Michigan Tech Publications
Timely and accurate extraction of pavement crack information is crucial to maintain service conditions and structural safety for infrastructures and reduce further road maintenance costs. Currently, deep learning techniques for automated pavement crack detection are far superior to traditional manual approaches in both speed and accuracy. However, existing deep learning models may easily lose crack details when processing images containing complex background textures or other noises. Although many studies have alleviated this challenge by introducing attention mechanisms, especially the non-local (NL) block, which has the ability to efficiently capture long-range dependencies to facilitate crack pixel capture, the huge computational cost …
Efficient Navigation And Motion Control For Autonomous Forklifts In Smart Warehouses: Lspb Trajectory Planning And Mpc Implementation, Konchanok Vorasawad, Myoungkuk Park, Changwon Kim
Efficient Navigation And Motion Control For Autonomous Forklifts In Smart Warehouses: Lspb Trajectory Planning And Mpc Implementation, Konchanok Vorasawad, Myoungkuk Park, Changwon Kim
Michigan Tech Publications
The rise of smart factories and warehouses has ushered in an era of intelligent manufacturing, with autonomous robots playing a pivotal role. This study focuses on improving the navigation and control of autonomous forklifts in warehouse environments. It introduces an innovative approach that combines a modified Linear Segment with Parabolic Blends (LSPB) trajectory planning with Model Predictive Control (MPC) to ensure efficient and secure robot movement. To validate the performance of our proposed path-planning method, MATLAB-based simulations were conducted in various scenarios, including rectangular and warehouse-like environments, to demonstrate the feasibility and effectiveness of the proposed method. The results demonstrated …
Nr Sidelink Performance Evaluation For Enhanced 5g-V2x Services, Mehnaz Tabassum, Felipe Henrique Bastos, Aurenice M. Oliveira, Aldebaro Klautau
Nr Sidelink Performance Evaluation For Enhanced 5g-V2x Services, Mehnaz Tabassum, Felipe Henrique Bastos, Aurenice M. Oliveira, Aldebaro Klautau
Michigan Tech Publications
The Third Generation Partnership Project (3GPP) has specified Cellular Vehicle-to-Everything (C-V2X) radio access technology in Releases 15–17, with an emphasis on facilitating direct communication between vehicles through the interface, sidelink PC5. This interface provides end-to-end network slicing functionality together with a stable cloud-native core network. The performance of direct vehicle-to-vehicle (V2V) communications has been improved by using the sidelink interface, which allows for a network infrastructure bypass. Sidelink transmissions make use of orthogonal resources that are either centrally allocated (Mode 1, Release 14) or chosen by the vehicles themselves (Mode 2, Release 14). With growing interest in connected and autonomous …
Estimation Of Anthropogenic And Volcanic So2 Emissions From Satellite Data In The Presence Of Snow/Ice On The Ground, Vitali E. Fioletov, Chris A. Mclinden, Debora Griffin, Nickolay A. Krotkov, Can Li, Joanna Joiner, Nicolas Theys, Simon Carn
Estimation Of Anthropogenic And Volcanic So2 Emissions From Satellite Data In The Presence Of Snow/Ice On The Ground, Vitali E. Fioletov, Chris A. Mclinden, Debora Griffin, Nickolay A. Krotkov, Can Li, Joanna Joiner, Nicolas Theys, Simon Carn
Michigan Tech Publications
Early versions of satellite nadir-viewing UV SO2 data products did not explicitly account for the effects of snow/ice on retrievals. Snow-covered terrain, with its high reflectance in the UV, typically enhances satellite sensitivity to boundary layer pollution. However, a significant fraction of high-quality cloud-free measurements over snow is currently excluded from analyses. This leads to increased uncertainties of satellite emission estimates and potential seasonal biases due to the lack of data in winter months for some high-latitudinal sources. In this study, we investigated how Ozone Monitoring Instrument (OMI) and TROPOspheric Monitoring Instrument (TROPOMI) satellite SO2 measurements over snow-covered surfaces can …
Compatibility Investigation Of Waste Plastics In Bitumen Via A Molecular Dynamics Method, Hui Yao, Xin Li, Hancheng Dan, Qingli Dai, Zhanping You
Compatibility Investigation Of Waste Plastics In Bitumen Via A Molecular Dynamics Method, Hui Yao, Xin Li, Hancheng Dan, Qingli Dai, Zhanping You
Michigan Tech Publications
The compatibility between waste plastic polymers and bitumen is the most challenging issue hindering the improvement of modified bitumen performance. The current practice of recycled waste plastics includes the use of polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE), etc. This study was designed to investigate the compatibility of different waste plastic polymers with bitumen binders by conducting molecular dynamics (MD) simulations at different temperatures. The molecular models of these materials were constructed in this study for the compatibility analysis, and they include the base bitumen, polymers (PVC, PP, and PE), polymer- bitumen blending systems. Using the output and related calculations …
An Investigation Of Phase Change Induced Marangoni-Dominated Flow Patterns Using The Constrained Vapor Bubble Data From Iss Experiments, Unmeelan Chakrabarti, Ayaaz Yasin, Kishan Bellur, Jeffrey Allen
An Investigation Of Phase Change Induced Marangoni-Dominated Flow Patterns Using The Constrained Vapor Bubble Data From Iss Experiments, Unmeelan Chakrabarti, Ayaaz Yasin, Kishan Bellur, Jeffrey Allen
Michigan Tech Publications
Kinetic models of liquid-vapor phase change often implicitly assume that the interface is in equilibrium. This equilibrium assumption can be justified for large flat interfaces far from the source of thermal energy, but it breaks down when the liquid surface is near a solid wall, or there is significant interface curvature. The Constrained Vapor Bubble (CVB) experiments conducted on the International Space Station (ISS) provide a unique opportunity to probe this common assumption and also provide unique data and insight into phase change-driven flow physics. The CVB experiment consists of a quartz cuvette partially filled with pentane such that a …
Differential Impact Of Blood Pressure Control Targets On Epicardial Coronary Flow After Transcatheter Aortic Valve Replacement, Brennan Vogl, Alejandra Chavez-Ponce, Adam Wentworth, Eric Erie, Pradeep Yadav, Vinod H. Thourani, Lakshmi Prasad Dasi, Brian Lindman, Mohamad Alkhouli, Hoda Hatoum
Differential Impact Of Blood Pressure Control Targets On Epicardial Coronary Flow After Transcatheter Aortic Valve Replacement, Brennan Vogl, Alejandra Chavez-Ponce, Adam Wentworth, Eric Erie, Pradeep Yadav, Vinod H. Thourani, Lakshmi Prasad Dasi, Brian Lindman, Mohamad Alkhouli, Hoda Hatoum
Michigan Tech Publications
Background: The cause for the association between increased cardiovascular mortality rates and lower blood pressure (BP) after aortic valve replacement (AVR) is unclear. This study aims to assess how the epicardial coronary flow (ECF) after AVR varies as BP levels are changed in the presence of a right coronary lesion. Methods: The hemodynamics of a 3D printed aortic root model with a SAPIEN 3 26 deployed were evaluated in an in vitro left heart simulator under a range of varying systolic blood pressure (SBP) and diastolic blood pressure (DBP). ECF and the flow ratio index were calculated. Flow index value …
Optimal Inverter-Based Resource Installation To Minimize Technical Energy Losses In Distribution Systems, Felipe B. Dantas, Damasio Fernandes, Washington L.A. Neves, Alana K.X.B. Branco, Flavio Costa
Optimal Inverter-Based Resource Installation To Minimize Technical Energy Losses In Distribution Systems, Felipe B. Dantas, Damasio Fernandes, Washington L.A. Neves, Alana K.X.B. Branco, Flavio Costa
Michigan Tech Publications
This paper proposes an algorithm for the optimal installation of inverter-based resources (IBR) composed of wind energy conversion systems, photovoltaic systems, and battery energy storage systems in distribution systems using genetic algorithm (GA) and the cuckoo search (CS) as optimization techniques. The OpenDSS software is used to calculate the power flow in the distribution system with different penetration levels of IBRs. It is used a standard load shape of the IEEE 123 bus system programmed in OpenDSS and irradiance, temperature, and wind speed curves from Brazil. The proposed algorithm, using a genetic algorithm and cuckoo search, was able to define …
Synthetic Aperture Scatter Imaging, Qian Huang, Zhipeng Dong, Gregory Nero, Yuzuru Takashima, Timothy J. Schulz, David J. Brady
Synthetic Aperture Scatter Imaging, Qian Huang, Zhipeng Dong, Gregory Nero, Yuzuru Takashima, Timothy J. Schulz, David J. Brady
Michigan Tech Publications
Diffraction limits the minimum resolvable feature on remotely observed targets to $\lambda R_{c}/A_{c}$, where $\lambda$ is the operating wavelength, $R_{c}$ is the range to the target and $A_{c}$ is the diameter of the observing aperture. Resolution is often further reduced by scatter or turbulence. Here we show that analysis of scattered coherent illumination can be used to achieve resolution proportional to $\lambda R_{s}/A_{s}$, where $R_{s}$ is the range between the scatterer and the target and $A_{s}$ is the diameter of the observed scatter. Theoretical analysis suggests that this approach can yield resolution up to 1000× better than the diffraction limit. …
S-Net: A Multiple Cross Aggregation Convolutional Architecture For Automatic Segmentation Of Small/Thin Structures For Cardiovascular Applications, Nan Mu, Zonghan Lyu, Mostafa Rezaeitaleshmahalleh, Cassie Bonifas, Jordan Gosnell, Marcus Haw, Joseph Vettukattil, Jingfeng Jiang
S-Net: A Multiple Cross Aggregation Convolutional Architecture For Automatic Segmentation Of Small/Thin Structures For Cardiovascular Applications, Nan Mu, Zonghan Lyu, Mostafa Rezaeitaleshmahalleh, Cassie Bonifas, Jordan Gosnell, Marcus Haw, Joseph Vettukattil, Jingfeng Jiang
Michigan Tech Publications
With the success of U-Net or its variants in automatic medical image segmentation, building a fully convolutional network (FCN) based on an encoder-decoder structure has become an effective end-to-end learning approach. However, the intrinsic property of FCNs is that as the encoder deepens, higher-level features are learned, and the receptive field size of the network increases, which results in unsatisfactory performance for detecting low-level small/thin structures such as atrial walls and small arteries. To address this issue, we propose to keep the different encoding layer features at their original sizes to constrain the receptive field from increasing as the network …
Urban Versus Lake Impacts On Heat Stress And Its Disparities In A Shoreline City, T. C. Chakraborty, Jiali Wang, Yun Qian, William Pringle, Zhao Yang, Pengfei Xue
Urban Versus Lake Impacts On Heat Stress And Its Disparities In A Shoreline City, T. C. Chakraborty, Jiali Wang, Yun Qian, William Pringle, Zhao Yang, Pengfei Xue
Michigan Tech Publications
Shoreline cities are influenced by both urban-scale processes and land-water interactions, with consequences on heat exposure and its disparities. Heat exposure studies over these cities have focused on air and skin temperature, even though moisture advection from water bodies can also modulate heat stress. Here, using an ensemble of model simulations covering Chicago, we find that Lake Michigan strongly reduces heat exposure (2.75°C reduction in maximum average air temperature in Chicago) and heat stress (maximum average wet bulb globe temperature reduced by 0.86°C) during the day, while urbanization enhances them at night (2.75 and 1.57°C increases in minimum average air …
Evolutionary History Of Western Eos Chaos Of Valles Marineris, Mars: Insights From Morphological Characteristics, Asif Iqbal Kakkassery, V. J. Rajesh, Rishitosh K. Sinha, Devika Padmakumar, K. S. Sajinkumar
Evolutionary History Of Western Eos Chaos Of Valles Marineris, Mars: Insights From Morphological Characteristics, Asif Iqbal Kakkassery, V. J. Rajesh, Rishitosh K. Sinha, Devika Padmakumar, K. S. Sajinkumar
Michigan Tech Publications, Part 1
The dynamics of aqueous processes within the Eos Chasma region in the trough of Valles Marineris on Mars have been attributed to a variety of Hesperian-aged landforms. We aim to improve the understanding of the geological characteristics of the western part of the Eos Chaos by investigating the morphological, topographical, and thermo-physical characteristics of the western semi-circular segment of Valles Marineris. The western Eos Chaos is characterized by remnants of an elevated crater rim, a central peak, and a circular boundary. Based on these observations, we infer that the study area is an ancient, highly degraded impact crater. Our observations …
Multiple Reflections And The Near-Field Effects On A Metamaterial Quarter-Wave Plate, James Davis, Durdu Güney
Multiple Reflections And The Near-Field Effects On A Metamaterial Quarter-Wave Plate, James Davis, Durdu Güney
Michigan Tech Publications
Metamaterial-based quarter-wave plates (QWPs) have emerged as promising candidates for advanced polarization control in a variety of optical applications, owing to their unique properties, such as ultra-thin profiles and tailored spectral responses. We design an ultra-thin, high-efficiency, and broadband QWP in transmission mode based on a TiO2" role="presentation" style="box-sizing: border-box; max-height: none; display: inline; line-height: normal; font-size: 13.2px; font-size-adjust: none; overflow-wrap: normal; text-wrap-mode: nowrap; float: none; direction: ltr; max-width: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(34, 34, 34); font-family: Arial, Arial, Helvetica, sans-serif; position: relative;">22/Au grating structure. We show that multiple reflections and …
Editorial For The Special Issue Entitled Hyperspectral Remote Sensing From Spaceborne And Low-Altitude Aerial/Drone-Based Platforms—Differences In Approaches, Data Processing Methods, And Applications, Amin Beiranvand Pour, Arindam Guha, Laura Crispini, Snehamoy Chatterjee
Editorial For The Special Issue Entitled Hyperspectral Remote Sensing From Spaceborne And Low-Altitude Aerial/Drone-Based Platforms—Differences In Approaches, Data Processing Methods, And Applications, Amin Beiranvand Pour, Arindam Guha, Laura Crispini, Snehamoy Chatterjee
Michigan Tech Publications
No abstract provided.
What Caused The Unseasonal Extreme Dust Storm In Uzbekistan During November 2021?, Xin Xi, Daniel Steinfeld, Steven M. Cavallo, Jun Wang, Jiquan Chen, Kanat Zulpykharov, Geoffrey M. Henebry
What Caused The Unseasonal Extreme Dust Storm In Uzbekistan During November 2021?, Xin Xi, Daniel Steinfeld, Steven M. Cavallo, Jun Wang, Jiquan Chen, Kanat Zulpykharov, Geoffrey M. Henebry
Michigan Tech Publications
An unseasonal dust storm hit large parts of Central Asia on 4-5 November 2021, setting records for the column aerosol burden and fine particulate concentration in Tashkent, Uzbekistan. The dust event originated from an agropastoral region in southern Kazakhstan, where the soil erodibility was enhanced by a prolonged agricultural drought resulting from La Niña-related precipitation deficit and persistent high atmospheric evaporative demand. The dust outbreak was triggered by sustained postfrontal northerly winds during an extreme cold air outbreak. The cold air and dust outbreaks were preceded by a chain of processes consisting of recurrent synoptic-scale transient Rossby wave packets over …
Acute Exposure To Two Biocides Causes Morphological And Molecular Changes In The Gill Ciliary Epithelium Of The Invasive Golden Mussel Limnoperna Fortunei (Dunker, 1857), Amanda Maria Siqueira Moreira, Erico Freitas, Mariana De Paula Reis, Júlia Meireles Nogueira, Newton Pimentel De Ulhôa Barbosa, André Luiz Martins Reis, Afonso Pelli, Paulo Ricardo Da Silva Camargo, Antonio Valadão Cardoso, Rayan Silva De Paula, Erika Cristina Jorge
Acute Exposure To Two Biocides Causes Morphological And Molecular Changes In The Gill Ciliary Epithelium Of The Invasive Golden Mussel Limnoperna Fortunei (Dunker, 1857), Amanda Maria Siqueira Moreira, Erico Freitas, Mariana De Paula Reis, Júlia Meireles Nogueira, Newton Pimentel De Ulhôa Barbosa, André Luiz Martins Reis, Afonso Pelli, Paulo Ricardo Da Silva Camargo, Antonio Valadão Cardoso, Rayan Silva De Paula, Erika Cristina Jorge
Michigan Tech Publications
Limnoperna fortunei, the golden mussel, is a bivalve mollusk considered an invader in South America. This species is responsible for ecological and economic damages due to its voluminous fouling capability. Chemical biocides such as MXD-100™ and sodium dichloroisocyanurate (NaDCC) are often used to control L. fortunei infestations in hydraulic systems. Thus, we proposed to investigate the effects of different periods (24, 48 and 72 h) of exposure to MXD-100™ (0.56 mg L−1) and NaDCC (1.5 mg L−1) on the gills of L. fortunei through morphological and molecular analyses. NaDCC promoted progressive morphological changes during the analyzed periods and only an …
Bioinspired Materials For Underwater Adhesion With Pathways To Switchability, Chanhong Lee, Huiqi Shi, Jiyoung Jung, Bowen Zheng, Kan Wang, Ravi Tutika, Rong Long, Bruce Lee, Grace X. Gu, Michael D. Bartlett
Bioinspired Materials For Underwater Adhesion With Pathways To Switchability, Chanhong Lee, Huiqi Shi, Jiyoung Jung, Bowen Zheng, Kan Wang, Ravi Tutika, Rong Long, Bruce Lee, Grace X. Gu, Michael D. Bartlett
Michigan Tech Publications
Strong adherence to underwater or wet surfaces for applications like tissue adhesion and underwater robotics is a significant challenge. This is especially apparent when switchable adhesion is required that demands rapid attachment, high adhesive capacity, and easy release. Nature displays a spectrum of permanent to reversible attachment from organisms ranging from the mussel to the octopus, providing inspiration for underwater adhesion design that has yet to be fully leveraged in synthetic systems. Here, we review the challenges and opportunities for creating underwater adhesives with a pathway to switchability. We discuss key material, geometric, modeling, and design tools necessary to achieve …
A Fairness Assessment Of Mobility-Based Covid-19 Case Prediction Models, Abdolmajid Erfani, Vanessa Frias-Martinez
A Fairness Assessment Of Mobility-Based Covid-19 Case Prediction Models, Abdolmajid Erfani, Vanessa Frias-Martinez
Michigan Tech Publications
In light of the outbreak of COVID-19, analyzing and measuring human mobility has become increasingly important. A wide range of studies have explored spatiotemporal trends over time, examined associations with other variables, evaluated non-pharmacologic interventions (NPIs), and predicted or simulated COVID-19 spread using mobility data. Despite the benefits of publicly available mobility data, a key question remains unanswered: are models using mobility data performing equitably across demographic groups? We hypothesize that bias in the mobility data used to train the predictive models might lead to unfairly less accurate predictions for certain demographic groups. To test our hypothesis, we applied two …
Coexistence Of Specialist And Generalist Species Within Mixed Plastic Derivative-Utilizing Microbial Communities, Laura G. Schaerer, Lindsay I. Putman, Isaac Bigcraft, Emma Byrne, Daniel G. Kulas, Ali Zolghadr, Sulihat Aloba, Rebecca Ong, David Shonnard, Stephen Techtmann
Coexistence Of Specialist And Generalist Species Within Mixed Plastic Derivative-Utilizing Microbial Communities, Laura G. Schaerer, Lindsay I. Putman, Isaac Bigcraft, Emma Byrne, Daniel G. Kulas, Ali Zolghadr, Sulihat Aloba, Rebecca Ong, David Shonnard, Stephen Techtmann
Michigan Tech Publications
BACKGROUND Plastic-degrading microbial isolates offer great potential to degrade, transform, and upcycle plastic waste. Tandem chemical and biological processing of plastic wastes has been shown to substantially increase the rates of plastic degradation however, the focus of this work has been almost entirely on microbial isolates (either bioengineered or naturally occurring). We propose that a microbial community has even greater potential for plastic upcycling. A microbial community has greater metabolic diversity to process mixed plastic waste streams and has built-in functional redundancy for optimal resilience. RESULTS Here, we used two plastic-derivative degrading communities as a model system to investigate the …
Semi-Supervised Learning Method For The Augmentation Of An Incomplete Image-Based Inventory Of Earthquake-Induced Soil Liquefaction Surface Effects, Adel Asadi, Laurie Gaskins Baise, Christina Sanon, Magaly Koch, Snehamoy Chatterjee, Babak Moaveni
Semi-Supervised Learning Method For The Augmentation Of An Incomplete Image-Based Inventory Of Earthquake-Induced Soil Liquefaction Surface Effects, Adel Asadi, Laurie Gaskins Baise, Christina Sanon, Magaly Koch, Snehamoy Chatterjee, Babak Moaveni
Michigan Tech Publications
Soil liquefaction often occurs as a secondary hazard during earthquakes and can lead to significant structural and infrastructure damage. Liquefaction is most often documented through field reconnaissance and recorded as point locations. Complete liquefaction inventories across the impacted area are rare but valuable for developing empirical liquefaction prediction models. Remote sensing analysis can be used to rapidly produce the full spatial extent of liquefaction ejecta after an event to inform and supplement field investigations. Visually labeling liquefaction ejecta from remotely sensed imagery is time-consuming and prone to human error and inconsistency. This study uses a partially labeled liquefaction inventory created …
Evolution Of Glassy Carbon Derived From Pyrolysis Of Furan Resin, Josh Kemppainen, Ivan Gallegos, Aaron Krieg, Jacob R. Gissinger, Kristopher E. Wise, Margaret Kowalik, Julia A. King, S. Gowtham, Adri Van Duin, Gregory Odegard
Evolution Of Glassy Carbon Derived From Pyrolysis Of Furan Resin, Josh Kemppainen, Ivan Gallegos, Aaron Krieg, Jacob R. Gissinger, Kristopher E. Wise, Margaret Kowalik, Julia A. King, S. Gowtham, Adri Van Duin, Gregory Odegard
Michigan Tech Publications
Glassy carbon (GC) material derived from pyrolyzed furan resin was modeled by using reactive molecular dynamics (MD) simulations. The MD polymerization simulation protocols to cure the furan resin precursor material are validated via comparison of the predicted density and Young's modulus with experimental values. The MD pyrolysis simulations protocols to pyrolyze the furan resin precursor is validated by comparison of calculated density, Young's modulus, carbon content, sp carbon content, the in-plane crystallite size, out-of-plane crystallite stacking height, and interplanar crystallite spacing with experimental results from the literature for furan resin derived GC. The modeling methodology established in this work can …
Investigating The Impact Of Seawater Intrusion On The Operation Cost Of Groundwater Supply In Island Aquifers, Weijiang Yu, Domenico Baù, Alex S. Mayer, Lauren K. Mancewicz, Mohammadali Geranmehr
Investigating The Impact Of Seawater Intrusion On The Operation Cost Of Groundwater Supply In Island Aquifers, Weijiang Yu, Domenico Baù, Alex S. Mayer, Lauren K. Mancewicz, Mohammadali Geranmehr
Michigan Tech Publications
Managing fragile island freshwater resources requires identifying pumping strategies that trade off the financial cost of groundwater supply against controlling the seawater intrusion (SWI) associated with aquifer pumping. In this work, these tradeoffs are investigated through a sensitivity analysis conducted in the context of an optimization formulation of the groundwater management problem, which aims at minimizing the groundwater supply operation cost associated with groundwater pumping and desalination treatment, subject to constraints on SWI control, as quantified by the water table drawdown over the well (∆s), the reduction in freshwater volume (∆FV) in the aquifer, or the salt mass increase (∆SM) …
Me-Em Enewsbrief, September 2023, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Me-Em Enewsbrief, September 2023, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical and Aerospace Engineering eNewsBrief
No abstract provided.
Observing Ocean Ecosystem Responses To Volcanic Ash, K. M. Bisson, S. Gassó, N. Mahowald, S. Wagner, B. Koffman, S. A. Carn, S. Deutsch, E. Gazel, S. Kramer, N. Krotkov, C. Mitchell, M. E. Pritchard, K. Stamieszkin, C. Wilson
Observing Ocean Ecosystem Responses To Volcanic Ash, K. M. Bisson, S. Gassó, N. Mahowald, S. Wagner, B. Koffman, S. A. Carn, S. Deutsch, E. Gazel, S. Kramer, N. Krotkov, C. Mitchell, M. E. Pritchard, K. Stamieszkin, C. Wilson
Michigan Tech Publications
Volcanic eruptions can be catastrophic events, particularly when they occur in inhabited coastal environments. They also play important roles in climate and biogeochemical cycles, including through nutrient deposition in the ocean. Volcanic ash studies in the ocean have focused on the phytoplankton response, generally quantifying changes in chlorophyll-a concentration. Many gaps remain in addressing fundamental questions regarding why volcanic ash deposition may enhance or limit both phytoplankton growth and/or drive community composition shifts. Here we outline a wide, multidisciplinary vision for monitoring volcanic eruptions near ocean ecosystems from satellites, including considerations for characteristics of airborne volcanic ash and ash geochemistry …