Mechanical Engineering Commons^™

Wireless Sensor Network-Based Monitoring Of Bridge Pile Foundations For Detecting Scouring Depth, Han-Tang Huang, H. Ping Tserng, Ruei-Yu Hou, Mirosław Skibniewski

Journal of Marine Science and Technology–Taiwan

Climate change brings about unprecedented increases in the occurrence of storms and flooding. In response to increased risk of bridge pier scouring, there is a need for increased safety monitoring of bridges. This paper presents a wireless sensor network (WSN) - based solution developed to measure micro-vibrations of a bridge pier. Test measurement values are converted with the use of the Fast Fourier Transform (FFT) method to obtain natural frequencies. Scouring depth of the pier is estimated with the use of a Finite Element Method model. WSN is used to collect the signal and to test data transmission stability in …

A New Fuzzy Dea Model For Solving The Mcdm Problems In Supplier Selection, Chi-Mao Tsai, Hsuan-Shih Lee, Guo-Ya Gan

Journal of Marine Science and Technology–Taiwan

Supplier selection is a crucial task in supply chain management, and good supply chain management is essential to a company's ability to develop sustainably and gain the trust and satisfaction of its customers. In modern supply chain management, supplier selection often takes the form of a multi-criteria decision-making (MCDM) problem. Thus, to solve this problem, this study formulated a novel fuzzy MCDM model, which is based on the fuzzy data envelopment analysis model. This novel approach can transform the linguistic variables of assessment criteria into well-founded quantitative data for calculation. Moreover, our approach can effectively discriminate between decision-making units (both …

Evaluation Of The Human Discomfort Caused By Ship Vibrations, Laurentiu Picu, Eugen Rusu

Journal of Marine Science and Technology–Taiwan

The present work analyzes the subjective responses of people exposed to transient vibrations caused by systems with a single degree of freedom. In this context, the main objective of the research was to identify the main effect of vibrations on people's well-being at work (in particular on vessels crew) and to discover those frequencies that lead to the greatest discomfort. In order to achieve this goal, 12 laboratory experiments were carried out involving ten male subjects in good health, aged between 28 and 42. The variables of the vibratory system considered are: acceleration (4.8 ÷ 8.6 m/s¡2), amplitude (1 ÷ …

Application Of Physically Based Semi-Distributed Hec-Hms Model For Flow Simulation In Tributary Catchments Of Kaohsiung Area Taiwan, Fiaz Hussain, Ray-Shyan Wu, Kai-Chun Yu

Journal of Marine Science and Technology–Taiwan

Hydrologic modeling is a commonly used tool to understand the rainfallerunoff processes of gauged and ungauged catchments for proper quantitative estimation of water resources availability. In the present study, an attempt is made to simulate surface runoff using a physically based semi-distributed hydrological (HEC-HMS) model for four local-scale tributary catchments of Kaohsiung area Taiwan. The input physical parameters of the model were calculated and preprocessed in HEC-GeoHMS based on digital elevation model (DEM), land use, soil and hydro-meteorological data. The model performance was satisfactory with Nash Sutcliffe Efficiency (NSE) ¼ 0.51 to 0.86 and the coefficient of determination (R2) ¼ …

Evaluating Key Factors Of Container Shipping Lines From The Perspective Of High-Tech Industry Shippers, Chien-Lung Hsu, Tien-Chun Ho

Journal of Marine Science and Technology–Taiwan

Because of the changes in customers' needs and demands created by the development of container transport in the 1960s, the global container transport business has become increasingly competitive. With the high-tech industry ranged with one of the few competitive industries in Taiwan from 2002, container shipping lines have been forced to implement innovative operating patterns to meet the evolving demands of the high-tech industry shippers. This study conducts a survey questionnaire of domestic high-tech industry shippers to explore the different factors affecting their selection of container shipping lines, evaluating the key influencing factors by maritime marketing's 4C framework: customer needs, …

Beach Topography Surveying Using Unmanned Aerial Vehicle Photogrammetry Technology, Hui-Ming Fang, Kuan-Tsung Chang, Sung-Shan Hsiao, Shih-Peng Chiang

Journal of Marine Science and Technology–Taiwan

The mechanisms of in situ topography changes must be identified for spatial planning in coastal areas. In this study, the authors used in situ direct measurement methods and indirect remote-sensing technologies to develop a method for beach topography surveillance. Unmanned aerial vehicles (UAVs) have advantages of high portability and mobility and low operating altitude. Therefore, a UAV was equipped with a lightweight camera and a positioning system that comprised a global positioning system and an inertial measurement unit. Aerial photogrammetry and aerial triangu-lation methods were adopted for matching image feature points to obtain the corresponding topographic points in the sand. …

Research Of The Process Of Continuous Hydrogenation Of Benzene In The Presence Of Modified Catalysts, B Kedelbaev Dr. Professor, K Lakhanova Phd, G Iztleuov, Sadritdin Turabdzhanov Dr., Professor

Technical science and innovation

The technology has been developed for the production of unsaturated alloy nickel hydrogenation catalysts. The results of the study of the phase, chemical compositions and structure of nickel alloys and catalysts showed that the ferroalloy introduction as a modifying additive affects the NiAl₃ / Ni₂Al₃ ratio. The studied alloying metals are practically insoluble in alkali and exist in the catalyst in dissolved states. All these changes favorably affect the catalytic properties of modified nickel catalysts in the benzene hydrogenation reaction. A systematic study of the stationary catalyst activity with addition of ferroalloys in the continuous catalytic …

Research Results For The Selection Of Working Body Types For Strip Tillage Of Soil, F Alimova, B Primkulov, A Tolibaev, M Gulamov

Technical science and innovation

The article describes the results of research on the selection of working body types for strip tillage of soil. Information on the advantages of the technology of minimal soil tillage (Strip-Till) is presented. The data obtained as a result of experimental studies to determine soil moisture and hardness, as well as the quality of soil tilling by the recommended working bodies, are presented. The arrangement schemes of working bodies for the considered technology have been drawn up. The general concept of the development of a combined aggregate on energy-resource-water-saving technologies for the cultivation of crops in permanent furrows and in …

Special Aspects Of Fuel Saving Of Agricultural Equipment And Its Environmental Influence On Oil, Ramzjon Hamroyev Assistant, Amirku Irgashev Dr. Professor, Yuriy Kuznetsov Dr. Academic

Technical science and innovation

The national economy of the country uses various machines and mechanisms, the vast majority of which are road transport, operated in various sectors of the Republic. Due to the fact that they operate in the severe operating conditions associated with off-road and high dusty environment, there is an intensive lubricant contamination of transmission units. This article studies the rates of fuel consumption when using agricultural machinery, such parameters as fuel and lubricant efficiency, flammability, motor ability of agricultural machinery, speed. In addition, the article presents the results of bench tests to determine the quantitative and qualitative indicators of abrasive particles …

Efficiency Of A Helio Heating Collector, Azamat Usenov, Shaxnoza Sultanova Phd, Jasur Safarov Dr., Professor, Tojiniso Rahmanova

Technical science and innovation

A study of several industrial heat demand identified several industries with favourable conditions for the use of solar energy, the most important industrial processes using heat at moderate temperatures are: sterilization, pasteurization, drying, hydrolysis, distillation and evaporation, rinsing and cleaning and polymerization. The study describes some important processes and the temperature range required for each of them.

In this paper, a model of a solar water-heated drying device for drying ginger (Zungiber) root and other medicinal plants has been developed and studied experimentally. Using the model, the useful energy and temperature coming from the solar collector were analysed. The graphs …

Modulation Of Mechanical Stress Mitigates Anti-Dsg3 Antibody-Induced Dissociation Of Cell–Cell Adhesion, Xiaowei Jin, Jordan Rosenbohm, Eunju Kim, Amir Monemian Monemianesfahani, Kristina Seiffert-Sinha, James K. Wahl Iii, Jung Yul Lim, Animesh A. Sinha, Ruiguo Yang

Department of Mechanical and Materials Engineering: Faculty Publications

It is becoming increasingly clear that mechanical stress in adhesive junctions plays a significant role in dictating the fate of cell–cell attachment under physiological conditions. Targeted disruption of cell–cell junctions leads to multiple pathological conditions, among them the life-threatening autoimmune blistering disease pemphigus vulgaris (PV). The dissociation of cell–cell junctions by autoantibodies is the hallmark of PV, however, the detailed mechanisms that result in tissue destruction remain unclear. Thus far, research and therapy in PV have focused primarily on immune mechanisms upstream of autoantibody binding, while the biophysical aspects of the cell– cell dissociation process leading to acantholysis are less …

Modulation Of Mechanical Stress Mitigates Anti-Dsg3 Antibody-Induced Dissociation Of Cell–Cell Adhesion, Xiaowei Jin, Jordan Rosenbohm, Eunju Kim, Amir Monemian Esfahani, Kristina Seiffert-Sinha, James K. Wahl Iii, Jung Yul Lim, Animesh A. Sinha, Ruiguo Yang

Department of Mechanical and Materials Engineering: Faculty Publications

It is becoming increasingly clear that mechanical stress in adhesive junctions plays a significant role in dictating the fate of cell–cell attachment under physiological conditions. Targeted disruption of cell–cell junctions leads to multiple pathological conditions, among them the life-threatening autoimmune blistering disease pemphigus vulgaris (PV). The dissociation of cell–cell junctions by autoantibodies is the hallmark of PV, however, the detailed mechanisms that result in tissue destruction remain unclear. Thus far, research and therapy in PV have focused primarily on immune mechanisms upstream of autoantibody binding, while the biophysical aspects of the cell– cell dissociation process leading to acantholysis are less …

Solid State Synthesis And Characterization Of Apatite Based Ceramic Waste Form For The Immobilization Of Radioactive Iodine, Md Imdadul Islam

LSU Doctoral Dissertations

The growing demand for nuclear power in the United States and worldwide is accountable for addressing the major concern of radioactive waste, involving the technical challenges of maintaining the nuclear fuel cycle and immobilizing high-level wastes for safe disposal in geological storage. The appropriate selection of waste forms for spent nuclear fuel such as fission products and radionuclides can be effective means for a feasible and sustainable nuclear fuel cycle. But highly volatile radionuclides such as iodine (129) are of specific concern due to its extraordinary long half-life (15.7 million years). Due to its poor solubility and high volatility at …

Teaching Engineering Virtually: A Rapid Response To Address The Academic Challenges Generated By Covid-19, Eleazar Marquez, Samuel Garcia

Mechanical Engineering Faculty Publications

In this study, an alternative pedagogical model was established to address the academic challenges posed when undergraduate engineering students in a private university in Texas were mandated to seek off-campus housing due to the outbreak of COVI-19. As a result of the rapid transition to remote instruction, traditional and effective pedagogical methods implemented for in-person instruction had to be modified to overcome challenges such as the lack of academic resources, established campus practices that promote effective learning (e.g., study groups), and time-zone differences. Additionally, the instructional format had to be adjusted to ensure that the academic development of the students …

Mechanical Engineering News, Georgia Southern University

Mechanical Engineering: News & Publications (2013-2023)

• Graduate Student to Present at Posters on the Hill

Foot Contact Dynamics And Fall Risk Among Children Diagnosed With Idiopathic Toe Walking, Rahul Soangra, Michael Shiraishi, Richard Beuttler, Michelle Gwerder, Lou Anne Boyd, Venkatesan Muthukumar, Mohamed Trabia, Afshin Aminian, Marybeth Grant-Beuttler

Electrical & Computer Engineering Faculty Research

Children that are diagnosed with Idiopathic Toe walking (cITW) are characterized by persistent toe-to-toe contacts. The objective of this study was to explore whether typical foot contact dynamics during walking predisposes cITW to a higher risk of falling. Twenty cITW and age-matched controls performed typical and toe walking trials. The gait parameters related to foot contact dynamics, vertical force impulses during stance, slip, and trip risk were compared for both groups. We found that cITW manifest less stable gait and produced significantly higher force impulses during push-off. Additionally, we found that cITW had a higher slip-initiation risk that was associated …

Mars Reconnaissance: Civil Engineering Advances For Human Exploration, Laurent Sibille, Robert W. Moses, Robert P. Mueller, Michelle A. Viotti, Michelle M. Munk, Paul J. Van Susante, Et. Al.

Michigan Tech Publications, Part 1

No abstract provided.

Evaluation Of Friction Stir Processing For Fabrication Of Composites In The Context Of Industry 4.0: A Bibliometric Review, Arunkumar Bongale, Pragya Saxena, Satish Kumar

Library Philosophy and Practice (e-journal)

Aluminum alloys having good strength to weight ratio and resistance to corrosion have a wide range of applications in aerospace, automobiles, military, sports and many other applications. In order to enhance the hardness and wear resistance of the surface without compromising the bulk properties, aluminum matrix based surface composites fabricated with various reinforcements on the surface are now a days being utilized widely as new generation materials. In the manufacturing of metal surface hybrid composites (precisely of light weight alloys like- Al, Mg, etc.), the friction stir processing is a promising new solid state processing technique which is versatile enough …

A Dynamic Programming Approach To Determine Optimum Modularity Level In Industrial Packaging, Marshal Louie, Kumar B

Journal of Applied Packaging Research

Modular packaging facilitate customization for accommodating variable product sizes in a product family. When determining package sizes for product variability, packaging engineers does not find difficulty to determine package dimension for less product variety whereas if the product variety is more, then determining the dimension of modular package involves complex decision-making and time-consuming process to find the optimal solution. This in turn directly impacts the overall lead time of the supply chain. Thus, in this paper a dynamic programming is developed to determine the quantity and dimension of modular packages for every demand of assorted products sizes. The program helps …

High Pressure Responsive Luminescence Of Flexible Eu3+ Doped Pvdf Fibrous Mats, Carlos Hernandez, Santosh K. Gupta, Jose P. Zuniga, Jorge Vidal, Rene Galvan, Hector Guzman, Lilian N. Chavez, Karen Lozano, Yuanbing Mao

Mechanical Engineering Faculty Publications

Exploring lanthanide doped materials and their high-pressure optical properties is important from the perspective of designing pressure sensors, piezoelectric materials, scintillators, and optoelectronic devices, just to mention a few. Understanding the high-pressure optical properties of polymeric fibrous mats provides significant advantages in terms of flexibility, tunability, facile processability, and malleability. In this work, we have developed flexible polyvinylidene difluoride (PVDF) fibrous mats doped with an Eu3+ source of Eu(NO3)3·5H2O (EN-PF) or Eu2(SO4)3 (ES-PF) by a Forcespinning® method. Microstructural analysis of these two systems indicates that Eu(NO3)3·5H2O and Eu2(SO4)3 are homogeneously distributed and dispersed into the PVDF matrix. Fiber formation …

Temperature-Immune Self-Referencing Fabry–Pérot Cavity Sensors, Hengky Chandrahalim, Jonathan W. Smith

AFIT Patents

A passive microscopic Fabry-Pérot Interferometer (FPI) sensor an optical fiber a three-dimensional microscopic optical structure formed on a cleaved tip of an optical fighter that reflects a light signal back through the optical fiber. The reflected light is altered by refractive index changes in the three-dimensional structure that is subject to at least one of: (i) thermal radiation; and (ii) volatile organic compounds.

Solid-State Transducer, System, And Method, Andrew Barnard

Michigan Tech Patents

The present disclosure includes solid-state transducers, a system, and a method. In one embodiment, a solid-state transducer includes a housing, a first end portion, a second end portion, a plurality of electrical conductors, and a thin-film resistive material. The thin-film resistive material is disposed between and in electrical communication with a plurality of electrical conductors. The thin-film resistive material is configured to receive one or more electrical signals from the plurality of electrical conductors, and generate thermal oscillations to create pressure waves in a medium in response to receiving the one or more electrical signals.

Impact Damage Ascertainment In Composite Plates Using In-Situ Acoustic Emission Signal Signature Identification, Robin James, Roshan Prakash Joseph, Victor Giurgiutiu

Faculty Publications

Barely visible impact damage (BVID) due to low velocity impact events in composite aircraft structures are becoming prevalent. BVID can have an adverse effect on the strength and safety of the structure. During aircraft inspections it can be extremely difficult to visually detect BVID. Moreover, it is also a challenge to ascertain if the BVID has in-fact caused internal damage to the structure or not. This paper describes a method to ascertain whether or not internal damage happened during the impact event by analyzing the high-frequency information contained in the recorded acoustic emission signal signature. Multiple 2 mm quasi-isotropic carbon …

Ignition Process And Flame Lift-Off Characteristics Of Dimethyl Ether (Dme) Reacting Spray, Khanh Duc Cung, Ahmed Abdul Moiz, Xiucheng Zhu, Seong-Young Lee

Michigan Tech Publications, Part 1

Advanced combustion systems that utilize different combustion modes and alternative fuels have significantly improved combustion performance and emissions compared to conventional diesel or spark-ignited combustions. As an alternative fuel, dimethyl ether (DME) has been receiving much attention as it runs effectively under low-temperature combustion (LTC) modes such as homogeneous charge compression ignition (HCCI) and reactivity control combustion ignition (RCCI). Under compression-ignition (CI), DME can be injected as liquid fuel into a hot chamber, resulting in a diesel-like spray/combustion characteristic. With its high fuel reactivity and unique chemical formula, DME ignites easily but produces almost smokeless combustion. In the current study, …

Mechanical Engineering News, Georgia Southern University

Mechanical Engineering: News & Publications (2013-2023)

• 2021 Engineering Design Challenge

Relative International Energy Conservation Code (Iecc) Energy Impacts By Compliance Path, Florida Solar Energy Center, Philip W. Fairey

FSEC Energy Research Center®

The EnergyGauge® USA (v.6.2) residential building energy simulation software tool is used to examine energy impacts in two-story, 2,376 ft², single-family homes configured in accordance with the minimum requirements of Section R402-R404 of the 2018 IECC in fourteen representative U.S. cities.⁴ EnergyGauge USA is a RESNET-accredited HERS software tool capable of evaluating not only the HERS Index and the IECC Section R406 Energy Rating Index Compliance Alternative but also the IECC Section R405 Simulated Performance Alternative as well as the IECC Section R402 R-Value and Total UA Alternative prescriptive methods along with all of the IECC mandatory …

Evaluating The Performance Of Devices Engineering To Quantify The Fars Test, Harsh Patel

USF Tampa Graduate Theses and Dissertations

Clinical rating scales play a major role in assessing progressive neurological diseases. Neurologists use these rating scales to provide a better diagnosis, to provide a better treatment plan, and to analyze the outcome of clinical trials. Friedreich’s ataxia (FA) is a neurodegenerative disease that causes ataxia in limbs, speech impairment, and polyneuropathy. Since FA is a progressive disease, various rating scales have been standardized to provide an objective assessment of the patient’s current condition. The Friedreich Ataxia Rating Scale (FARS) includes several tests to capture neurological features of FA and to assess the functional stage of ataxia. The rubrics used …

In-Situ Calibrated Modeling Of Residual Stresses Induced In Machining Under Various Cooling And Lubricating Environments, Julius M. Schoop

Mechanical Engineering Faculty Publications

Although many functional characteristics, such as fatigue life and damage resistance depend on residual stresses, there are currently no industrially viable ‘Digital Process Twin’ models (DPTs) capable of efficiently and quickly predicting machining-induced stresses. By leveraging advances in ultra-high-speed in-situ experimental characterization of machining and finishing processes under plane strain (orthogonal/2D) conditions, we have developed a set of physics-based semi-analytical models to predict residual stress evolution in light of the extreme gradients of stress, strain and temperature, which are unique to these thermo-mechanical processes. Initial validation trials of this novel paradigm were carried out in Ti-6Al4V and AISI 4340 alloy …

Study Of Laser Based Additive Manufacturing For Titanium And Copper Alloys, Congyuan Zeng

LSU Doctoral Dissertations

Material processing by laser is increasingly applied in industrial applications for its outstanding characteristics, such as localized heating, high efficiency, and high manufacturing precision. In this study, two kinds of laser material processing strategies were investigated, namely laser surface engineering and laser-powder-bed fusion additive manufacturing, with pure titanium and copper alloys as target materials, respectively.

For laser surface engineering related studies, the work includes the investigation of the dynamic interactions between titanium and pure nitrogen or ambient air under transient laser processing conditions. Thanks to the in-situ synchrotron X-ray diffraction tests, the high-temperature reaction steps between titanium and pure nitrogen/ambient …

Experimental And Numerical Investigation In Directed Energy Deposition For Component Repair, Lan Li, Xinchang Zhang, Frank W. Liou

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Directed energy deposition (DED) has been widely used for component repair. In the repair process, the surface defects are machined to a groove or slot and then refilled. The sidewall inclination angle of the groove geometry has been recognized to have a considerable impact on the mechanical properties of repaired parts. The objective of this work was to investigate the feasibility of repairing various V-shaped defects with both experiments and modeling. At first, the repair volume was defined by scanning the defective zone. Then, the repair volume was sliced to generate the repair toolpath. After that, the DED process was …