Engineering Commons^™

Labview-Based Remote Real-Time Evaluation System For Motor Winding Machines, Jia-Sheng Hu, Chien-Chu Yeh, Ke-Han Su, Chao-Jen Chen, Ming-Yang Cheng

Journal of Marine Science and Technology–Taiwan

This paper proposes the design and evaluation methodologies for a remote human-machine interface (HMI) system for motor winding machines. An electric motor with an interior rotor evaluates the system performance. The motor winding machine has a 3 degree-of-freedom motion space controlled by a motion control kernel: IMP-2. Real-time data of the motor winding status is crucial for ensuring quality and reliability and detecting malfunction, which facilitates the development and control of mass production of electric motors. Hence, a realtime monitoring interface is essential. This paper presents a LabVIEW-based HMI, which transfers the winding statuses of a winding machine to remote …

Unbalanced Load Compensation In Three-Phase Power System With A Current-Regulated Dstatcom Based On Multilevel Converter, Wei-Neng Chang, Ching-Huan Liao, Po-Li Wang

Journal of Marine Science and Technology–Taiwan

In this paper, a current-regulated distribution-level static synchronous compensator (DSTATCOM) is proposed for real-time unbalanced load compensation in three-phase electric power distribution systems. The main circuit of the DSTATCOM uses multilevel cascade full H-bridge converter with delta-connected configuration, which is suitable for high-voltage, high-power applications. The compensation algorithm of the DSTATCOM is derived in the phasor domain. Preliminary verification of the DSTATCOM is executed with MatLab/SimuLink program. Finally, a hardware prototype is built for testing. Experimental results confirm the effectiveness of the proposed DSTATCOM for real-time unbalanced load compensation.

A Novel Method For Testing Lcd By Integrating Shorting Bar And Taguchi Doe Technologies, Jium-Ming Lin, Yuan-Jung Chiang

Journal of Marine Science and Technology–Taiwan

This paper proposes a novel LCD false defect detection method that involves integrating shorting-bar and Taguchi technologies. When both the gate and data lines of an LCD are activated using a shorting bar technique, and an illuminator is applied to the background panel, if all thin-film transistor (TFT) arrays are free of point defect failures, then the lights from the illuminator can penetrate the scanned pixels (i.e., a bright, complete image should appear on the display). Otherwise, there are defects in the TFT cells exhibiting dark patterns. In this study, the P-diagram of the Taguchi design of experiment method was …

Predictions Of Stress-Strain Curve And Fatigue Life For Aisi 316 Stainless Steel In Cyclic Straining, Liang-Hsiung Chou, Yung-Chuan Chiou, Chia-Chin Wu, Ying- Jen Huang

Journal of Marine Science and Technology–Taiwan

In this study, experimental observations have been performed to understand the cyclic stress-amplitude response, the cyclic hardening/softening characteristics and the cyclic fatigue properties of AISI 316 stainless steel. Based on the experimental observations, these results are found so that the tested AISI 316 stainless steel possesses cyclic hardening characteristics. The shape of the stable hysteresis loop is symmetrical in tension and compression. The Massing cyclic stress-strain behavior is obviously absent. For the case of the absence of the Massing behavior, the power-law type equation is successfully applied to simulate the shape of the stable hysteresis loop at all applied levels …

The Hydrodynamic Characteristics Of An Inclined Submerged Porous Plate With Rock Filled Structure, Ching-Yun Yueh, Shih-Hsuan Chuang, Chih-Hao Su

Journal of Marine Science and Technology–Taiwan

In this paper, we investigate the hydrodynamic efficiency of normal incident waves interacting with an absorbing system. The wave absorbing system consists of a submerged permeable structure filled with rock, a solid back wall, and a submerged horizontal or slightly inclined porous plate. Using a linear wave theory assumption, a multi-domain BEM (MBEM) model was created to calculate and discuss the reflection coefficients, free surface wave profiles, total wave force on the solid wall, and the horizontal and uplift forces acting on the porous plate of the water waves from several properties of the breakwater. The numerical model was calibrated …

Probability Calculation Method With Neural Network For Estimating Wave Overtopping At Coastal Structures: Learning From Regular Wave Tests, Ching-Piao Tsai, Karl-Friedrich Daemrich, Chuen-Lin Ho

Journal of Marine Science and Technology–Taiwan

An exact mathematical description of the wave overtopping processes is impossible due to the complex nature of the processes. Therefore the dependency of overtopping from wave parameters and coastal structures was mostly studied by physical model tests. To avoid the uncertainties due to imperfect statistics of wave heights in the irregular wave trains performed in physical models, the mean overtopping rates of irregular waves can be determined by the probability calculation method (PCM) (Goda, 2000) based on the regular wave data. The PCM combined with an artificial neural network (NN) technique is proposed in this paper to determine the mean …

Numerical Simulation Of Deep Excavation In Gravel Layers, Chien-Yi Wu, Shuh-Gi Chern

Journal of Marine Science and Technology–Taiwan

This study analyzed gravel excavation cases in the Xindian District of Taiwan. Instead of the parameters typically employed in deep excavation analysis we used the deformations of diaphragm walls in a back analysis to achieve recommendations regarding the ideal range of the soil elastic modulus Es in the analysis parameters of numerical simulations for the Xindian District stratum or similar strata. We used Plaxis 2D software to analyze the gravel layer. The results indicated that, when the fifth layer of gravel was set to N = 100 and the range of the soil elastic modulus Es was set between 7.84N …

Velocity-Based Egress Model For The Analysis Of Evacuation Process On Passenger Ships, Yoon-Ok Cho, Sol Ha, Kwang-Phil Park

Journal of Marine Science and Technology–Taiwan

This study presents a velocity-based egress model, which takes into account different aspects of human behavior in an emergency situation, for the evacuation analysis on passenger ships. It was supposed that the egress model consists of three behaviors: individual, crowd, and emergency behavior. The individual behavior was represented by the body shape, walking speed, walking direction, and rotation of each passenger. The basic walking direction of each passenger was obtained as a solution to the shortest distance route to a destination using a visibility graph. The crowd behavior of the passengers was composed of two components: one is a flock …

Numerical Simulation Study Of Hydrodynamic Impact Of Sea-Crossing Bridge, Xiao-Feng Guo, Chu-Han Chen, Jun-Jian Tang, Zhou-Hua Guo

Journal of Marine Science and Technology–Taiwan

This paper used the Sea-Crossing Bridge in Quanzhou Bay as an example to simulate its tidal flow field after construction by a semi-implicit Lagrangian-Eulerian finite difference method. Triangle or quadrilateral meshes were used to refine a mesh for the sea area close to the bridge in the model. Each bridge pier was treated as land. The minimum side length of the mesh was approximately 5 meters. The simulation results showed that slow flow areas were formed in front of bridge piers due to the influence of rising and falling tides; at the back of bridge piers, slow flow areas were …

On Wave Interaction With Floating Structures With Dragged Moorings, Po-I Chen, Cheng-Tsung Chen, Jaw-Fang Lee

Journal of Marine Science and Technology–Taiwan

This study developed an analytical solution in the frequency domain that considers the interactions among waves, floating structures, and mooring lines. The proposed solution was applied to investigate a problem involving a moored floating structure subjected to incident waves. The floating structure was considered as moving with three degrees of freedom, namely surge, heave, and roll. The mooring lines were simplified as springs, and the springs were assumed to be subjected to a Morison-type wave force. In the proposed solution, the wave field is first expressed as a problem involving a superposition of scattering and radiation waves. The wave field …

Outsourcing Decisions In Single Machine Scheduling Problem With Multiple External Facilities, Jung Man Hong, Jong Hyup Lee

Journal of Marine Science and Technology–Taiwan

This paper considers outsourcing decisions in a scheduling problem. The objective of the problem is to minimize the outsourcing costs under the constraints of the capacity of outsourcing facilities and due date of each job. The problem is composed of three kinds of decisions. The first decision is the selection of jobs to be processed in-house, the second is to schedule the in-house processing jobs with due date constraints, and the last is to select an outsourcing provider for each outsourced job where the outsourcing provider has a capacity constraint. Some optimality conditions and solution properties for the problem are …

Short-Term Building Energy Model Recommendation System: A Meta-Learning Approach, Can Cui, Teresa Wu, Mengqi Hu, Jeffery D. Weir, Xiwang Li

Faculty Publications

High-fidelity and computationally efficient energy forecasting models for building systems are needed to ensure optimal automatic operation, reduce energy consumption, and improve the building’s resilience capability to power disturbances. Various models have been developed to forecast building energy consumption. However, given buildings have different characteristics and operating conditions, model performance varies. Existing research has mainly taken a trial-and-error approach by developing multiple models and identifying the best performer for a specific building, or presumed one universal model form which is applied on different building cases. To the best of our knowledge, there does not exist a generalized system framework which …

An Exploratory Study: Correlations Between Occupational Stressors, Coping Mechanisms, And Job Performance Among Chinese Aviation Maintenance Technicians, Yu Wang, Julius C. Keller, Chenyu Huang, Richard O. Fanjoy

Journal of Aviation Technology and Engineering

Aviation maintenance technicians play a vital role in air transportation. These workers are responsible for keeping aircraft airworthy and executing safety responsibilities. Undesirable stress levels may have a negative impact on work performance (Mowday, Porter, & Steers, 2013). Poor work performance may manifest in safety violations, absenteeism, turnover, and disengagement. These outcomes may disrupt an organization’s operation and negatively impact the financial bottom line. This mixed-methods exploratory research study was aimed at examining the relationships between occupational stress, coping mechanisms, and job performance. Research questionnaires were electronically distributed to frontline aviation maintenance technicians at multiple airlines in China. Eighty-two ( …

Observation Of Metallic Surface States In The Strongly Correlated Kitaev-Heisenberg Candidate Na2Iro3, Nasser Alidoust, Chang Liu, Su-Yang Xu, Ilya Belopolski, Tongfei Qi, Minggang Zeng, Daniel S. Sanchez, Hao Zheng, Guang Bian, Madhab Neupane, Yu-Tzu Liu, Stephen D. Wilson, Hsin Lin, Arun Bansil, Gang Cao, M. Zahid Hasan

Center for Advanced Materials Faculty Publications

We report high-resolution angle-resolved photoemission spectroscopy measurements on the honeycomb iridate Na₂IrO₃. Our measurements reveal the existence of a metallic surface band feature crossing the Fermi level with nearly linear dispersion and an estimated surface carrier density of 3.2 x 10¹³ cm^-2, which has not been theoretically predicted or experimentally observed, and provides the first evidence for metallic behavior on the boundary of this material, whereas the bulk bands exhibit a robust insulating gap. We further show the lack of theoretically predicted Dirac cones at the M¯ points of the surface Brillouin …

Communications System Using Signal Modulation, William C. Barott

Publications

A communication method and system for communication utilizing modulation of digital signals, such as by targets and/or by use of low-complexity tags is presented. Targets may include any device or object that may alter signals, and tags can include a device with the ability to reflect and/or alter the properties of the signals and, in doing so, impose specific modulations on or alterations of such signals. Modulations can be sensed or detected using a receiver or receivers implementing processing algorithms derived from passive radar detection operations or other processes.

Distributed Coordination And Control Of Renewable Energy Sources In Microgrids, Javad Khazaei Khazaei

USF Tampa Graduate Theses and Dissertations

Microgrid is an emerging technology in the eld of electrical engineering which employs the concept of Distributed Energy Resources (DERs) in order to generate electricity in a small sized power system. The main objectives of this dissertation are to: 1- design a new control for lower level control of DERs in microgrids, 2- implement distributed upper level control for DERs in microgrids and 3- apply analytical approaches in order to analyze DERs in microgrids. The control in each DER can be divided into two main categories: lower and upper level. Lower level control is the main objective of control in …

Evolution Of The Automotive Body Coating Process—A Review, Nelson K. Akafuah, Sadegh Poozesh, Ahmad Salaimeh, Gabriela Patrick, Kevin Lawler, Kozo Saito

Mechanical Engineering Faculty Publications

Automotive coatings and the processes used to coat automobile surfaces exemplify the avant-garde of technologies that are capable of producing durable surfaces, exceeding customers’ expectations of appearance, maximizing efficiency, and meeting environmental regulations. These accomplishments are rooted in 100 years of experience, trial-and-error approaches, technique and technology advancements, and theoretical assessments. Because of advancements directed at understanding the how, why, when, and where of automobile coatings, the progress in controlling droplets and their deposition attributes, and the development of new technologies and paint chemistries, a comprehensive and up-to-date review of automobile coatings and coating technologies was considered to be of …

Controlled, Pulsatile Release Of Thermostabilized Inactivated Polio Vaccine From Plga-Based Microspheres, Stephany Y. Tzeng, Rohiverth Guarecuco, Kevin J. Mchugh, Evan M. Rosenberg, Yingying Zeng, Robert Langer, Ana Jaklenec

Vaccine Technology VI

Many vaccines, such as the inactivated polio vaccine (IPV), must be administered in several doses for full efficacy. Because patient access is a major challenge for vaccination efforts in developing countries, administering multiple doses per patient is impractical in those areas. Single-administration vaccines would greatly improve efforts to vaccinate populations in Third World countries, and the World Health Organization (WHO) Expanded Program for Immunization describes an ideal vaccine as one that is heat-stable, requires only one shot, and is easy to administer. Although already existing technologies, such as microspheres composed of poly(lactic-co-glycolic acid) (PLGA), are able to encapsulate …

Development Of Typhax, A Salmonella Typhi Vi Polysaccharide Protein Capsular Matrix Vaccine, Kevin P. Killeen

Vaccine Technology VI

Matrivax Research & Development Corporation is researching and developing a novel technology termed Protein Capsular Matrix Vaccine (PCMV) as an alternative to polysaccharide-protein conjugate vaccines. In a PCMV, polysaccharide antigens are entrapped in a cross-linked protein ‘carrier’ matrix. This process is simpler than conjugate vaccines and should yield polysaccharide vaccines that elicit T_H-cell ‘memory’, are highly efficacious, and less expensive to manufacture.

Typhoid fever, caused by Salmonella enterica serovar Typhi, is a disease that afflicts ~16 million people worldwide, resulting in 600,000 deaths, annually. Although typhoid fever vaccines are commercially available, there are significant limitations. Ty21a is an …

Combining Doe With An Empirical Approach To Improve Vaccine Formulation Development, Jill Livengood, Tim Powell, Melissa Bushey

Vaccine Technology VI

Vaccine development and formulation is based upon understanding of the candidate’s target product profile, and leverages knowledge and experience in pharmaceutical products. Developing an optimal formulation takes into account factors such as ensuring route of administration, product stability, and identifying Quality Target Product Profiles that are suitable for the product’s intended use. Based upon such knowledge and experience, multiple excipient formulations may be first identified for initial screening. Achieving the QTPP is a measure of results, and can be achieved with screening formulations by aggressive accelerated stability study conditions to enable the final formulation components to be down-selected. This presentation …

Curipilot, Gregory Cusack, Karan Daryanani, Nathaniel Tucker

Interdisciplinary Design Senior Theses

The drone industry has rapidly grown over the last three years and many large companies have determined that the phenomenon is worth investing in. Recently, Intel has shown interest in this growing industry. Intel developed a next generation processor to be used in drones in addition to investing in the Chinese drone hardware company, Yuneec. Contracted by Intel, the CuriPilot team laid the foundation for linking the hardware and software layers of Intel's drone technology by designing the stabilization control system for the next generation of processors and drones. The CuriPilot team built a foundation for future drone development and …

Significance Of Parameters Affecting The Performance Of A Passive Down-Draft Evaporative Cooling (Pdec) Tower With A Spray System, Daeho Kang, Richard K. Strand

Publications and Research

PDEC towers with spray systems are known to achieve substantial energy savings. Various parameters such as the wet-bulb depression, the tower height, and the wind speed have been known to be key factors affecting the performance of the system. To date, the significance of these parameters and other important factors have not been adequately treated in the literature. There also has been a lack of models that can successfully investigate potential benefits of the system under various conditions where this particular system could be applicable. To address these critical issues, this study performed a parametric analysis by using a FLUENT …

Characterization Of Ha And Na-Containing Vlps Produced In Suspension Cultures Of Hek 293 Cells, Amine Kamen, Alina Venereo-Sanchez, Rénald Gilbert, Aziza Manceur, Parminder Chahal, Sven Ansorge, Wangxue Chen

Vaccine Technology VI

Virus like particles (VLPs) can be formulated into promising vaccines to prevent influenza infection. In addition of having a structure and composition that mimic the wild type virus, VLPs are safe since they are devoid of viral genes and consequently are not infectious. One approach to scale up the manufacturing of VLPs is to produce them in a serum-free suspension culture using a stable mammalian cell line. Importantly, with VLPs synthetized by mammalian cells, the post-translational modifications of the surface antigens should be similar to the wild type virus, and therefore should trigger a potent and specific immune response for …

Vaccines: Reaching For Higher Branches After The Low Hanging Fruit Has Been Picked, Michael G. Kurilla

Vaccine Technology VI

Vaccines represent one of the most significant advances by medicine in addressing infectious diseases being responsible for the elimination of a few and the virtual eradication of several other scourges. In addition, medicine is also beginning to appreciate the potential applicability of vaccines beyond infectious diseases to areas such as oncology. During any emerging infectious disease public health event, availability of a vaccine figures prominently in the assessment of the capability to address the threat most effectively. A more rapid deployment of new vaccines would enable more effective management of emerging threats. Efforts to streamline manufacture and production of vaccines …

Immunization With Surface Immunogenic Protein Induces A Decrease Of Vaginal Colonization By Group B Streptococcus In An Experimental Mouse Model, Jorge A. Soto, Abel E. Vasquez, Diego Diaz-Dinamarca, Daniel A. Soto, Robert Rojas, Alexis M. Kalergis

Vaccine Technology VI

The Group B streptococcus (GBS) is the leading cause of neonatal sepsis and meningitis in developed countries and an emerging pathogen in adults. A neonatal infection occurs predominantly during the delivery by either inhalation or ingestion of contaminated secretions of the mother’s vagina. Maternal screening by rectovaginal GBS colonization at 35–37 weeks of gestation, with subsequent intra-partum antibiotic prophylaxis (IAP) at the onset of labor, is implemented in some countries to prevent newborn invasive by GBS. Currently, there are not vaccines to prevent the devastating consequences of GBS and a glycoconjugate vaccine is under clinical experimentation (Clinical Trials Phase III). …

Conference Program (Vaccine Technology Vi), Laura A. Palomares, Tarit Mukhopadhyay, Manon Cox, Nathalie Garçon

Vaccine Technology VI

No abstract provided.

Production Of A Nanoplasmid™ With A Large Gene Insert Using The Hypergro™ Fermentation Process, Aaron Carnes, Neha Tiwari, Jill Beilowitz, Carlos Sampson, Dorothy Peterson, Jim Williams

Vaccine Technology VI

Plasmid based DNA vaccines are emerging as a promising alternative to traditional vaccines due to several advantages, including faster production of DNA plasmids using E. coli. However, further increases in transgene expression are needed to meet efficacy requirements for various non-viral gene therapy and DNA vaccination applications. While existing minicircle DNA technology has been shown to offer improved levels and durations of transgene expression by removal of the bacterial region from the plasmid, low manufacturing yields may be a barrier to widespread use of minicircle DNA for vaccination.

NTC’s minimalized Nanoplasmid™ vectors utilize RNA-OUT (R_OUT) antibiotic-free selection …

Dango (Doings And Goings On) - Vol. 22 | Issue 4, Cecily Towell, Matthew Kimball, Haley Stien, Aric Tate, Rusty Towell, Vicente Rojas, Zhaojia Xi, Caleb Hicks, Joshua Daniel Martinez, Reuben Byrd, Paul Carstens, Mike Daugherity, Donald Isenhower

DANGO: Doings and Goings On: Summer Research Newsletter, Department of Engineering and Physics

Summer Research Newsletter for ACU's Engineering and Physics Department

Looma Lesson Planner, Elise Herrmannsfeldt, Suparna Jasuja, Kate Lassalle-Klein, Roshan Ramankutty

Computer Science and Engineering Senior Theses

Looma Lesson Planner is a web application that allows its users, experienced educators, to select, organize, and present existing classroom materials and educational content in the format of a custom-made lesson plan. Looma, an all-in-one computer developed by non-profit organization VillageTech Solutions, is designed for school teachers in rural Nepal, India. It provides them with basic access to textbooks, activities, and digital media that may be relevant in meeting Nepal's curriculum requirements. However, Looma did not initially include a simple interface for teachers to connect many different forms of content together into cohesive, custom lesson plans.

Our application presents and …

Judging Airline Pilots’ Performance With And Without An Assessment Model: A Comparison Study Of The Scoring Of Raters From Two Different Airlines, David Weber

Journal of Aviation/Aerospace Education & Research

Various models have been suggested to assess the performance of airline pilots. However, the influence of a model on assessors’ scoring remains largely unexplored. The aim of the present study was to contrast the assessments of raters from two airlines, who assessed performance in pairs of the same airline and rank by using or not using an assessment model. The results showed differences between the assessors of the two airlines in terms of their scoring. Implications were drawn in regards to the usage of a model and its influence on pilot performance assessment.