Engineering Commons^™

Hepatic Cell Mobilization For Protection Against Ischemic Myocardial Injury, Shu Q. Liu, John B. Troy, Chi Hao Luan, Roger J. Guillory Ii

Michigan Tech Publications, Part 1

The heart is capable of activating protective mechanisms in response to ischemic injury to support myocardial survival and performance. These mechanisms have been recognized primarily in the ischemic heart, involving paracrine signaling processes. Here, we report a distant cardioprotective mechanism involving hepatic cell mobilization to the ischemic myocardium in response to experimental myocardial ischemia–reperfusion (MI-R) injury. A parabiotic mouse model was generated by surgical skin-union of two mice and used to induce bilateral MI-R injury with unilateral hepatectomy, establishing concurrent gain- and loss-of-hepatic cell mobilization conditions. Hepatic cells, identified based on the cell-specific expression of enhanced YFP, were found in …

Quantifying Hydrologic Pathway And Source Connectivity Dynamics In Tile Drainage: Implications For Phosphorus Concentrations, Saeid Nazari, William I. Ford, Kevin W. King

Biosystems and Agricultural Engineering Faculty Publications

Flowpathways and source water connectivity dynamics are widely recognized to affect tile-drainage water quality. In this study, we developed and evaluated a framework that couples event-based hydrograph recession and specific conductance end-member mixing analysis (SC-EMMA) to provide a more robust framework for quantifying both flow pathway dynamics and source connectivity of drainage water in tile-drained landscapes. High-frequency (30-min) flow and conductivity data were collected from an edge-of-field tile main located in northwestern Ohio, and the newly developed framework was applied for data collected in water year 2019. Multiple linear regression (MLR) analysis was used to evaluate the impact of pathway-connectivity …

Reducing Power During Manufacturing Test Using Different Architectures, Yi Sun

Computer Science and Engineering Theses and Dissertations

Power during manufacturing test can be several times higher than power consumption in functional mode. Excessive power during test can cause IR drop, over-heating, and early aging of the chips. In this dissertation, three different architectures have been introduced to reduce test power in general cases as well as in certain scenarios, including field test.

In the first architecture, scan chains are divided into several segments. Every segment needs a control bit to enable capture in a segment when new faults are detectable on that segment for that pattern. Otherwise, the segment should be disabled to reduce capture power. We …

A Fault-Tolerant Optimal Message Routing Methodology For Cube-Nnected- Les Parallel Computers, Gene Eu Jan, Cheng-Hung Li, Yung-Yuan Chen, Shao-Wei Leu

Journal of Marine Science and Technology–Taiwan

A cube-connected-cycles (CCC) is a regular graph, suitable for constructing the interconnection network of parallel or multi-node computer systems. The CCC network possesses the features of symmetry, regularity, fault tolerance, and fixed degree of the network. Message delivery through an interconnection network sometimes fails due to processing node and/or link faults or simply because some processors are too busy to handle message transfer. To make a CCC-based parallel computer more resilient to node/link faults, this paper proposes an optimal routing method that guarantees to find a shortest path between the source and the destination nodes within a faulty CCC-based network …

A Novel Signal Processing Approach For Valve Health Condition Classification Of A Reciprocating Compressor With Seeded Faults Considering Time-Frequency Partitions, Yih-Hwang Lin, Wen-Sheng G Lee, Chung-Yung Wu

Journal of Marine Science and Technology–Taiwan

This study deals with a novel signal processing approach for automated valve condition classification of a reciprocating compressor with seeded faults. The classification system consists of a front end time-frequency analysis platform for the vibration signal measured, fault feature vectors for making the formidable amount of time-frequency data manageable, and a probabilistic neural network for automatic classification without the intervention of human experts. Rather than representing each time-frequency data set with one single feature vector comprising three indices, namely time, frequency, and amplitude, the time-frequency plane is further partitioned into an appropriate number of sub-regions to enhance the characteristics representation …

A Rigorous Review And Thorough Planning For The Ship Inspection System In Taiwan, Shuen-Tai Ung, Chi-Cheng Tsai, Chih-Li Chen

Journal of Marine Science and Technology–Taiwan

The ship inspection system can be regarded as a frontline fighting against substandard ships. However, the ship inspection rate in Taiwan is low and the vessels under the flag are categorized in the Grey List by Paris and Tokyo MOUs according to statistics. Thus, the current status of the ship inspection system of the country should be examined and improved. In this paper, the ship inspection system is evaluated in terms of the system structure, legislation, mechanisms and training patterns. The shortcomings are appreciated under the Hierarchical Task Analysis structure. A list of the alternatives for improvement and the priority …

Semi-Active Vibration Control For Offshore Platforms Based On Lqg Method, Shu-Qing Wang, Ning Li

Journal of Marine Science and Technology–Taiwan

The objective of this paper is to mitigate the wave-induced vibration of offshore platform with magneto-rheological (MR) damper. The model of the platform coupled with MR damper is established where the external wave force is approximated with a white noise via a designed filter. Based on Linear Quadratic Gaussian (LQG) method, the optimal control force is determined when taking the measurement noise into account. Semi-active control algorithm is applied to generate the MR damping force by comparing with the optimal control force. Numerical example demonstrates that the semi-active control strategy based on LQG method can reduce the responses of the …

Numerical Stability Analysis For Independent Modal Vibration Suppression Of A Fluid-Conveying Pipe Using A Piezoelectric Inertia Actuator, Yih-Hwang Lin, Jui-Lung Chen, Chih-Liang Chu, Yau-Kun Tsai

Journal of Marine Science and Technology–Taiwan

This study deals with numerical stability analysis for independent modal vibration suppression of a fluid-conveying pipe using a piezoelectric inertia actuator (PIA). The stability issue of the approach as proposed by the pioneer developers is addressed. The approach utilizes an infinite control weight for one component of the modal control input and results in a severe control spillover problem for the complex mode controlled, easily leading to closed loop instability even for open loop stable systems. The stability of the system depends on how the left eigenvector is normalized for transforming the original coupled equations to the decoupled ones in …

A Creative Differential Evolution Algorithm For Global Optimization Problems, Hsin-Chuan Kuo, Ching-Hai Lin, Jeun-Len Wu

Journal of Marine Science and Technology–Taiwan

Under the framework of the differential evolution algorithm, we develop a creative algorithm by extrapolating the thinking of the garbage can model. The developed algorithm is hence named in the study as a creative differential evolution algorithm (CDE). To verify the performance of the CDE, we selected seven well-known benchmark functions; three of them are uni-modal and four multi-modal. In conducting the numerical experiment, we adopted two different numbers of dimensions for each test function, which is 50 and 100. The results show that CDE can find the global optimum robustly, demonstrate that CDE significantly improves the DE’s performance.

Prediction And Simulation Of Broadband Propeller Noise, Ali Can Takinacı, Tarkan Taralp

Journal of Marine Science and Technology–Taiwan

An empirical prediction model of broadband noise for marine propellers is proposed. The model is composed of two components. The first component is the empirical prediction of the frequency domain broadband noise based on a wellestablished lifting surface algorithm providing accurate prediction of the cavitation pattern on the propeller. The second component is the modulation of the noise in the time domain. The two components of the model applied in sequence generate an output yielding a realistic propeller spectrum and audio signature. The propeller noise developed in this study, with the addition of other sources such as machinery and natural …

Scale Effects In Scour Physical-Model Tests: Cause And Alleviation, Yu-Hai Wang, Wei-Guo Jiang, Yan-Hong Wang

Journal of Marine Science and Technology–Taiwan

Scale effect occurs when a prototype hydraulic process is simulated at a laboratory scale due to dissatisfaction of similarity laws. It might lead to considerable deviation when the model scour depth is extrapolated to prototype value. Three popular experimental approaches including predictionequation-targeted flume test, series-model test and similitude-model test are reviewed with emphasis upon their merits and limitations in reducing or alleviating scale effects. Scale laws guiding scour physical-model design are discussed for performing cost-effective model tests. An empirical equation is further derived from data of clear-water pier scour experiments to examine the test results in up-scale extrapolating. It is …

An Assessment Of Job Performance Of Vessel Traffic Service Operators Using An Analytic Hierarchy Process And A Grey Interval Measure, Hsi-Ching Chen, Hua-An Lu, Hsien-Hua Lee

Journal of Marine Science and Technology–Taiwan

Operator training is a vital issue for vessel traffic service (VTS), since the International Maritime Organization has adopted the new version of the Guidelines for VTS 1997. Many countries have begun to alter the content of training courses, in order to comply with international standards. However, Taiwan still lacks effective method to assess individual operator’s job performance, capabilities, or the effectiveness of a training program. This study collates the standard training courses to construct an analytic hierarchy process (AHP) model and to investigate the relative evaluation weights for all criteria, using the group decision of the principal instructors. Grey interval …

On The Stabilization Of A Class Of Uncertain Systems With Time-Varying Delay Via Vsc Approach, Wen-Jeng Liu

Journal of Marine Science and Technology–Taiwan

In this paper, the robust stabilization problem for a class of time-delayed multi-input systems with matched and unmatched uncertainties is considered. Here, all the matched uncertainties, unmatched uncertainties and the delay term may be time-varying. Variable structure control (VSC) is suggested to design stabilizing controllers for these uncertain time-delayed multi-input systems. The proposed controllers guarantee the global reaching condition of the sliding mode in these uncertain time-delayed multi-input systems. Further, they ensure that the system trajectories asymptotically converge to the sliding mode. In the sliding mode, the investigated time-delayed systems with matched and unmatched uncertainties still possess the insensitivity to …

Forced Convection Film Condensation Of Downward-Flowing Vapor On Horizontal Tube With Wall Suction Effect, Tong-Bou Chang, Fu-Jen Wang

Journal of Marine Science and Technology–Taiwan

The heat transfer performance of the condensate layer formed by a downward-flowing, dry saturated vapor flowing over an isothermal horizontal tube with wall suction effects is examined. Under the effects of wall suction, the gravity force, the potential flow pressure gradient, and the interfacial shear stress, the local/mean Nusselt numbers of the condensate film are obtained as a function of the Jakob number Ja, the Prandtl number Pr, the Rayleigh number Ra, the two-phase mean Reynolds number Rev, the dimensionless pressure gradient parameter P, and the suction parameter Sw. The results show that the mean Nusselt number increases with increasing …

Pollination Habitat And Flower Plating For City Beautification, Jim Speer

2021 Spring Reports (Sullivan)

The City of Sullivan identified needs to improve sustainable infrastructure and green space in Sullivan, IN through their Quality of Life plan. Students in ENVI460 were tasked with providing recommendations for their daily operations and site plans that could improve habitats and attractiveness for the community and tourists. Students provided recommendations for native habitat planting and community involvement/education. They also provided site recommendations for community garden and green space updates.

Complete Streets, Jim Speer

2021 Spring Reports (Sullivan)

The City of Sullivan enacted a Quality of Life plan to address multiple improvements to their city, including some of the city’s infrastructure. Mayor Clint Lamb’s goal is to connect the city via roadways and trail systems that are accessible for all transportation methods and attractive for community members and tourists. ENVI460 students provided recommendations based off the city’s need for improvements to road systems and attractiveness. Students recommended a new roadway design for the Main Street section, sustainable infrastructure additions and buffer zones, and green space for attraction sites.

Sullivan Trail Connector, Jim Speer

2021 Spring Reports (Sullivan)

The City of Sullivan has multiple plans for trail connectors throughout the city. ENVI460 students provided recommendations for a trail connector between the City of Sullivan and Sullivan County. This trail connector harnesses positives of both the city and county to increase use. Students also provided recommendations for multi-use options on the trail system.

An Examination Of The Influence Of Distillation On The Combustion Behavior Of Apparently Equivalent Surrogate Fuels, Jay A. Lefkowitz

Theses and Dissertations

Use of surrogates to emulate the combustion behaviors of prevaporized real fuels has been widely demonstrated in the literature. However, many combustion applications utilize atomized fuel sprays, and for these configurations, the assumption of fuel property homogeneity in prevaporized fuel combustion is tenuous. This work uses a simplified distilling droplet model to demonstrate a real potential for vaporization-coupled deviations from the single-valued combustion property targets used to characterize prevaporized combustion behaviors. To verify the model-based observations, flame blowout measurements from a custom-built annular spray burner rig are measured. Sets of essentially equivalent prevaporized jet fuel and gasoline surrogates suggested in …

Analysis Of Benefits Of An Expansion To Udot's Incident Management Program, Logan Stewart Bennett

Theses and Dissertations

In 2018 the Utah Department of Transportation (UDOT) funded a study in which data were collected to evaluate performance measures for UDOT's Incident Management Team (IMT) program. After that study was completed, UDOT received funding to expand the size of its IMT program. Additionally, TransSuite, a data source used by the UDOT Traffic Operations Center to log incident-related data, was reconfigured to provide a higher quantity of performance measure data. This study made use of the new data source, in addition to Computer Aided Dispatch logs provided by the Utah Highway Patrol that were used in the first study, to …

Findings Report: Virtual Workshop On ‘Resilient Supply Of Critical Minerals’, Marek Locmelis, Angela D. Lueking, Michael S. Moats, Kwame Awuah-Offei, Lana Z. Alagha, Mark W. Fitch, Alanna Krolikowski, Shelby Clark

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Executive Summary
On August 2-3, 2021, the Thomas J. O’Keefe Institute for Sustainable Supply of Strategic Minerals at Missouri University of Science and Technology (Missouri S&T) hosted the NSF-funded virtual workshop ‘Resilient Supply of Critical Minerals’. The workshop was convened via Zoom and attracted 158 registrants, including 108 registrants from academia (61 students), 30 registrants from government agencies, and 20 registrants from the private sector. Four topical sessions were covered:

A. Mineral Exploration and Source Diversification.
B. Supply Chain and Policy Issues.
C. Improving Mineral Recycling and Reprocessing Technologies.
D. Technological Alternatives to Critical Minerals.

Each topical session was composed …

Highly Integrated And Miniaturized 3d Printed Serial Dilution Microfluidic Devices For Dose-Response Assays, Jose Luis Sanchez Noriega

Theses and Dissertations

The ability to generate a range of concentrations of various solutions rapidly and conveniently is an ongoing need in biotechnology. In this thesis we demonstrate how we took advantage of the full process control afforded by our recent custom high resolution 3D printer and resin advances to realize highly integrated and miniaturized microfluidic components for simultaneous on-chip serial dilution for dose-response assays. With judicious selection of mixed layer thicknesses and pixel-by-pixel dose control, we show that the diameter of 3D printed membrane valves can be reduced from 300 µm to 46 µm. We further introduce an entirely new kind of …

Power-Over-Tether Unmanned Aerial System Leveraged For Trajectory Influenced Atmospheric Sensing, Daniel Rico

School of Computing: Dissertations, Theses, and Student Research

The use of unmanned aerial systems (UASs) in agriculture has risen in the past decade and is helping to modernize agriculture. UASs collect and elucidate data previously difficult to obtain and are used to help increase agricultural efficiency and production. Typical commercial off-the-shelf (COTS) UASs are limited by small payloads and short flight times. Such limits inhibit their ability to provide abundant data at multiple spatiotemporal scales. In this thesis, we describe the design and construction of the tethered aircraft unmanned system (TAUS), which is a novel power-over-tether UAS configured for long-term, high throughput atmospheric monitoring with an array of …

Mechanical Engineering News, Georgia Southern University

Mechanical Engineering: News & Publications (2013-2023)

• Department Hosts Summer Camp for HS Students

Forecasting Inundation Extents In The Amazon Basin Using Srh-2d And Hand Based On The Geoglows Ecmwf Streamflow Services, Christopher Hyde Edwards

Theses and Dissertations

Floods are the most impactful natural disasters on earth, and reliable flood warning systems are critical for disaster preparation, mitigation, and response. The GEOGloWS ECMWF Streamflow Services (GESS) provide forecasted streamflow throughout the world. While forecasted discharge is essential to flood warning, forecasted inundation extents are required to understand and predict flood impact. In this research, I sought to expand GESS flood warning potential by generating inundation extents from streamflow forecasts. I compared Height Above Nearest Drainage (HAND), a method beneficial for flood mapping on a watershed scale, to a 2D hydrodynamic model, specifically Sedimentation and River Hydraulics – Two …

Comparison Of Concrete And Steel Jacket Methods For Reinforcing A Concrete Bridge Pier By Numerical And Experimental Studies, Hadi Faghihmaleki

Makara Journal of Technology

Various rehabilitation and strengthening procedures have been developed in recent decades. A study to determine which methods can be implemented to increase the useful life of the bridge before strengthening must be performed. In this study, the seismic behavior of a reinforced concrete bridge pier with dimension 3.5 × 3.5 m, which was reinforced by two steel and a concrete jacket, was investigated. Nonlinear geometric models and materials were analyzed to estimate the seismic parameters of the pier. Results show an increase in energy absorption, ultimate strength, and ductility for the steel jacket, as well as a greater increase in …

Effect Of Arc Plasma Sintering On The Structural And Microstructural Properties Of Fe-Cr-Ni Austenitic Stainless Steels, Parikin Parikin, M. Dani, A. Dimyati, N. D. Purnamasari, B. Sugeng, M. Panitra, A. Insani, T. H. Priyanto, S. Mustofa, Syahbuddin Syahbuddin, A. Huang

Makara Journal of Technology

X-ray diffraction techniques were performed to determine the actual crystal structure of A2 austenitic stainless steel (ASS) as-cast and A2 ASS after arc plasma sintering (APS) for 2 s. Computations were conducted on the basis of the Bragg arithmetic formula by comparing the S2 arithmetic with the interplanar spacing. The Bragg arithmetic formula is a simple series for the determination of the crystalline phase of materials based on the Miller indices of cubic shapes or other shapes. A2 ASS as-cast was identified to have a crystal structure of face-centered cubic with lattice parameter a = 3.58 Å. A similar crystal …

Trend Significance Levels Of Rain Onset And Cessation And Lengths Of The Wet And Dry Seasons In Epe, Lagos State, Nigeria, Adekunle Adedeji Alli, Olorunwa Eric Omofunmi

Makara Journal of Technology

This study aims to reduce crop failure resulting from a dry spell, which is the first occurrence of unsustainable rainfall that deceives farmers into planting. Thus, trends need to be tested using hypothesis, kurtosis, and other statistics to analyze the risks associated with unstable planting calendars and their possible mitigation strategies. The daily rainfall data from 1982 to 2018 were obtained from the archive of NASA/POWER SRB/FLASH, and the research location is Epe, Lagos State, Nigeria, which lies at latitude 6.585° N and longitude 3.962° E. Microsoft Excel was used to perform the tests. Results show that the null hypothesis …

Kinetic Modeling Study Of Laminar Burning Velocity Of Gasoline–Ethanol–Methanol Blends At Elevated Temperature And Pressure, Ahmad Syihan Auzani, Cahyo Setyo Wibowo, Riesta Anggarani, Yulianto Sulistyo Nugroho, Bambang Sugiarto

Makara Journal of Technology

Gasoline–ethanol–methanol (GEM) blends have been considered to replace pure gasoline as spark ignition engine fuel. Their physical and chemical properties and performance and emission measurements from real engines have been reported previously. However, a fundamental study that can explain the unique results of GEM compared with those of pure gasoline is lacking. This study aims to compare the laminar burning velocity of GEM blends at different mixtures, equivalence ratios, temperatures, and pressures with that of pure gasoline. A laminar flame propagation model and reaction mechanisms from the literature were were for a numerical simulation. In this study, the chemical components …

Improvement Of Electrical Properties Of Cmc-Pva Doped With Various Contents Of Lino3 As An Application For Hybrid Polymer Electrolytes, Amalia Zulkifli, Norfatihah Mazuki, Ahmad Salihin Samsudin

Makara Journal of Technology

The present work was carried out with the development of hybrid polymer electrolytes (HPEs) by using carboxymethyl cellulose (CMC)–polyvinyl alcohol (PVA) doped with different contents of lithium nitrate (LiNO3) for the determination of their structural and conduction properties. The structural analysis was conducted by using Fourier transform infra-red spectroscopy and showed the interaction between the blend host polymer and ionic dopant, which formed via the coordinating site of CMC-PVA and Li+-NO3−. The complexes of CMC-PVA doped LiNO3 led to an increment in ionic conductivity, as observed by electrical impedance spectroscopy, and the sample containing 20 wt% LiNO3 obtained the highest …

Music Information Retrieval Based On Active Frequency, Hardianto Wibowo, Wildan Suharso, Yufis Azhar, Galih Wasis Wicaksono, Agus Eko Minarno, Dani Harmanto

Makara Journal of Technology

Music is the art of combining frequencies. A balance of frequencies gives rise to a harmonious tone. Several features of music can be analyzed, and they include sociocultural background, lyrics, mood, tempo, rhythm, harmony, melody, timbre, and instrumentation. In this study, we use the frequency of instrumentation as a feature for classification because each instrument has a frequency range. To test this frequency range, we use five music genres and one music playing skill. The five genres are dangdut, electronic dance music (EDM), metal, pop/rock, and reggae. The music playing skill is acoustic. Active frequencies are tested using the k-nearest …