Engineering Commons^™

Large Eddy Simulations Of Vertical Jets In Crossflow, Pranaya Pokharel

LSU Doctoral Dissertations

Jets in crossflow (JICF) have applications ranging from oil spill to film cooling of turbine blades. Hence, an understanding of the flow physics is important. The majority of the research has been conducted for low velocity ratios between jet and crossflow with round jets. JICF is demonstrated to behave differently for high velocity ratios and different jet shapes. Circular and rectangular jets are commonly used in aircraft applications. Current study focuses on high velocity ratio JICF issuing from both circular and rectangular exit.

For simulating JICF, an in house code “Chem3D” is used with Large Eddy Simulation (LES) to model …

First-Principles Study On The Catalytic Role Of Cerium Dioxide In The Conversion Of Organic Compounds, Chuanlin Zhao

LSU Doctoral Dissertations

Ceria is an earth-abundant material that has been widely used in heterogeneous catalysis, environmental catalysis, and energy applications thanks for its ability to readily convert between different oxidation states. The objective of this study is to theoretically elucidate the reaction mechanisms for the conversion of model organic compounds on ceria, in order to gain insights for the design of cost-effective and selective ceria-based catalysts. Acetaldehyde, acetic acid, and para-nitrophenyl phosphate monoester were selected as the model compounds to probe ceria surfaces. Density functional theory calculations can provide accurate predictions of adsorption and reaction energetics, which can be used to …

Image Zooming Using Corner Matching, Ronald Marsh, Md Nurul Amin, Charles Crandall, Raymond Davis

Computer Science Faculty Publications

This work was intended to direct the choice of an image interpolation/zoom algorithm for use in UND’s Open Prototype for Educational Nanosats (OPEN) satellite program. Whether intended for a space-borne platform or a balloon-borne platform, we expect to use a low cost camera (Raspberry Pi) and expect to have very limited bandwidth for image transmission. However, the technique developed could be used for any imaging application. The approach developed analyzes overlapping 3x3 blocks of pixels looking for “L” patterns that suggest the center pixel should be changed such that a triangle pattern results. We compare this approach against different types …

Containers And Reproducibility In Scientific Research, Sara Faraji Jalal Apostal, David Apostal, Ronald Marsh

Computer Science Faculty Publications

Numerical reproducibility has received increased emphasis in the scientific community. One reason that makes scientific research difficult to repeat is that different computing platforms calculate mathematical operations differently. Software containers have been shown to improve reproducibility in some instances and provide a convenient way to deploy applications in a variety of computing environments. However, there are software patterns or idioms that produce inconsistent results because mathematical operations are performed in different orders in different environments resulting in reproducibility errors. The performance of software in containers and the performance of software that improves numeric reproducibility may be of concern for some …

17-01 An Intersection Database Enhances Blind Pedestrians' Access To Complex Signalized Intersections: Stage 2 Analysis & Database Development, Dave Guth, Janet Barlow, Paul Ponchillia, Lee Rodegerdts, Dae Shik Kim, Kevin Lee

Transportation Research Center Reports

This project investigated the effects of providing verbal descriptions of intersections and crosswalks on the performance of street-crossing subtasks by individuals who are totally blind. The intersections included crosswalks that varied widely in geometric and operational characteristics, including the presence or absence of accessibility features. In the no-database condition, participants used their typical street-crossing procedures. In the database-condition, participants additionally listened to database-generated descriptions of the intersections and crosswalks before crossing. The database descriptions had significant positive effects on some subtasks (primarily “crossing” subtasks such as deciding when to cross) and not others (primarily “wayfinding” subtasks such as remaining in …

Design Of An Automatic Defect Identification Method Based Ecpt For Pneumatic Pressure Equipment, Bo Zhang, Yuhua Cheng, Chun Yin, Xuegang Huang, Sara Dadras, Hadi Malek

Electrical and Computer Engineering Faculty Publications

In this paper, in order to achieve automatic defect identification for pneumatic pressure equipment, an improved feature extraction algorithm eddy current pulsed thermography (ECPT) is presented. The presented feature extraction algorithm contains four elements: data block selection; variable step search; relation value classification; and between-class distance decision function. The data block selection and variable step search are integrated to decrease the redundant computations in the automatic defect identification. The goal of the classification and between-class distance calculation is to select the typical features of thermographic sequence. The main image information can be extracted by the method precisely and efficiently. Experimental …

Usu Researchers Develop New Devices To Test Retinal Cells | College Of Engineering, Usu College Of Engineering

College of Engineering News

Researchers at Utah State University have developed new devices to mechanically stress human cells in the lab.

New Findings Of Controls On Carbon Export In Permafrost Terrain | College Of Engineering, Usu College Of Engineering

College of Engineering News

After two decades of collecting data, a team of researchers discovered new ways in which groundwater moves and controls the export of carbon from land to streams in the permafrost terrain of the Alaskan North Slope.

Reinforcement Learning In Robotic Task Domains With Deictic Descriptor Representation, Harry Paul Moore

LSU Doctoral Dissertations

In the field of reinforcement learning, robot task learning in a specific environment with a Markov decision process backdrop has seen much success. But, extending these results to learning a task for an environment domain has not been as fruitful, even for advanced methodologies such as relational reinforcement learning. In our research into robot learning in environment domains, we utilize a form of deictic representation for the robot’s description of the task environment. However, the non-Markovian nature of the deictic representation leads to perceptual aliasing and conflicting actions, invalidating standard reinforcement learning algorithms. To circumvent this difficulty, several past research …

Optical And X-Ray Technology Synergies Enabling Diagnostic And Therapeutic Applications In Medicine, Brian W. Pogue, Brian C. Wilson

Dartmouth Scholarship

X-ray and optical technologies are the two central pillars for human imaging and therapy. The strengths of x-rays are deep tissue penetration, effective cytotoxicity, and the ability to image with robust projection and computed-tomography methods. The major limitations of x-ray use are the lack of molecular specificity and the carcinogenic risk. In comparison, optical interactions with tissue are strongly scatter dominated, leading to limited tissue penetration, making imaging and therapy largely restricted to superficial or endoscopically directed tissues. However, optical photon energies are comparable with molecular energy levels, thereby providing the strength of intrinsic molecular specificity. Additionally, optical technologies are …

Non-Parametric Classification Of Time Series Using Permutation Ordinal Statistics, Aldo Duarte Vera Tudela

LSU Master's Theses

The present thesis explores some approaches to classify time series without prior statistical information using the concept of permutation entropy. Motivated by the results from a previous published and relevant work that set similarity relationships between EEG time series, a reproduction of the proposed approach was performed giving negative results. The failure to reproduce those results led to the conclusion that the approach of building statistics from permutation patterns have to be complemented with another metric in order to be used for classification purposes. The concept of Total Variation Distance (TVD) was then used to develop three algorithms to classify …

Hydrologic Observation, Model, And Theory Congruence On Evapotranspiration Variance: Diagnosis Of Multiple Observations And Land Surface Models, Ruijie Zeng, Ximing Cai

Civil and Environmental Engineering Faculty Publications

This paper reconciles the state-of-the-art observations and simulations of evapotranspiration (ET) temporal variability through a diagnostic framework composed of an observation-model-theory triplet. Specifically, a confirmed theoretical tool, Evapotranspiration Temporal VARiance Decomposition (EVARD), is used as a benchmark to estimate ET monthly variance (σ²_ET) across the contiguous United States (CONUS) with inputs including hydroclimatic observations, Gravity Recovery and Climate Experiment-based terrestrial water storage, four observation-based products (ET_RSUW by the University of Washington, ET_RSMOD16 from MOD16 Global Terrestrial ET Data Set, ET_FLUXNET upscaled from of fluxtower observations, and ET_GLEAM from Global Land Evaporation Amsterdam Model), …

Keyword-Based Patent Citation Prediction Via Information Theory, Farshad Madani, Martin Zwick, Tugrul U. Daim

Engineering and Technology Management Faculty Publications and Presentations

Patent citation shows how a technology impacts other inventions, so the number of patent citations (backward citations) is used in many technology prediction studies. Current prediction methods use patent citations, but since it may take a long time till a patent is cited by other inventors, identifying impactful patents based on their citations is not an effective way. The prediction method offered in this article predicts patent citations based on the content of patents. In this research, Reconstructability Analysis (RA), which is based on information theory and graph theory, is applied to predict patent citations based on keywords extracted from …

Development Of Concrete And Reinforced Concrete In Near Future, V. Usmanov, B. Kurbanov

Problems of Architecture and Construction

The article depicts the main directions and tasks of the development of scientific technology in the field of concrete and reinforced in the future. The main direction of scientific and technical development on the sphere of c in the field of concrete and reinforced concrete is systematically to improve the features of materials.

Transverse Vibrations Of The Building On The Basis Of A Continuum Plate Model, D. Rumi, G. Ayubov

Problems of Architecture and Construction

In this article was considered the question of the oscillation of the buildings with a continuum plate model based on the finite difference method. The results of the amplitude-frequency characteristics of the building are compared by the finite element method with finite differences and the correctness of the solution of the obtained calculation model is justified.

Calculations Of The Viscous Plastic Displacement Of The Pulsed-Loaded Flat Frames, M. Aslanov

Problems of Architecture and Construction

The article is offering two methods of the determination of the final offsets and time of deformation of flat square-wave paradise, subject to pulsed load, attached to transverse element. The Offsets, achieving approximately one third of a part of the stairwell are determined by method modal approximation and method of the estimation of the borders for offsets; the dependency from plastic velocities of deformation is considered with uniform-viscous defining equations.

Determination Of The Longitudinal Reactions Of The Complex Node Under The Underground Structure Earthquakes, N. Egamov, N. Kholbutayev, G. Karimova

Problems of Architecture and Construction

In paper the longitudinal is investigated seismic oscillations of difficult knot of underground structures at earthquakes. The gained results shows, that nosing motions of difficult knot on lateral a pipe the considerable. It confirms results of observation of an aftereffect destructive earthquakes.

Evaluation Of The Influence Of Inertial Force In The Vat Of Underground Pipelines In Seismic Impact, D. Bekmirzayev, N. Nishanov

Problems of Architecture and Construction

Evaluation of the influence of the power of inertia on the mode of deformation of underground pipelines under seismic exposure. The article analyzes the equations for the evaluation of the effect of inertia in seismo-dynamics of underground pipelines using analytical and numerical methods. The effects of the force of inertia are obtained by drawing a number of graphical results and estimating the underground pipelines.

Calculation Of The More-Flying Coatings With Bended-Hard Truss, G. Freedman

Problems of Architecture and Construction

The Article depicts the features of calculating the structures of the more-flying coatings in the form of cross-cutaneous–tight worst jointly with the supporting contour. The calculation program is used by the LIRA-CAD program, in which there are all means for solving geometrically-nonlinear problems.

Calculation Of Thick Plates Of Variable Thickness In Three-Dimensional Formulation, D. Usarov, A. Yuvmitov

Problems of Architecture and Construction

Three-dimensional problem of bending and oscillations of orthotropic plates of variable thickness is considered in the paper. The problem is solved on the basis of the method of displacements expansion into an infinite series, which allows it to be reduced to solving a system of two-dimensional infinite recurrent equations.

Magnetic And Electrocatalytic Properties Of Transition Metal Doped Mos2 Nanocrystals, Karthik Chinnathambi

Materials Science and Engineering Faculty Publications and Presentations

In this paper, the magnetic and electrocatalytic properties of hydrothermally grown transition metal doped (10% of Co, Ni, Fe, and Mn) 2H-MoS₂ nanocrystals (NCs) with a particle size 25–30 nm are reported. The pristine 2H-MoS₂ NCs showed a mixture of canted anti-ferromagnetic and ferromagnetic behavior. While Co, Ni, and Fe doped MoS₂ NCs revealed room temperature ferromagnetism, Mn doped MoS₂ NCs showed room temperature paramagnetism, predominantly. The ground state of all the materials is found to be canted-antiferromagnetic phase. To study electrocatalytic performance for hydrogen evolution reaction, polarization curves were measured for undoped and the doped …

Thermal And Mechanical Energy Harvesting Using Lead Sulfide Colloidal Quantum Dots, Taher Ghomian

LSU Doctoral Dissertations

The human body is an abundant source of energy in the form of heat and mechanical movement. The ability to harvest this energy can be useful for supplying low-consumption wearable and implantable devices. Thermoelectric materials are usually used to harvest human body heat for wearable devices; however, thermoelectric generators require temperature gradient across the device to perform appropriately. Since they need to attach to the heat source to absorb the heat, temperature equalization decreases their efficiencies. Moreover, the electrostatic energy harvester, working based on the variable capacitor structure, is the most compatible candidate for harvesting low-frequency-movement of the human body. …

Teaching Cybersecurity In An Undergraduate Engineering Course, Xiuli Qu, Xiaohong Yuan

KSU Proceedings on Cybersecurity Education, Research and Practice

Organizations create a huge amount of sensitive and confidential data, which must be protected from unauthorized access or disclosure. Nowadays, most organizations store their business data in digital formats. With the increasing use of digital data, data breaches are more often and serious in recent years. Therefore, it is very important for next-generation engineers to be aware of the importance of information security, and be able to recognize vulnerabilities and threats to an information system and design user-friendly and effective security measures. To achieve it, two modules of information systems security, including lectures and in-class labs, were developed and taught …

Study Of Physical Layer Security And Teaching Methods In Wireless Communications, Zhijian Xie, Christopher Horne

KSU Proceedings on Cybersecurity Education, Research and Practice

In most wireless channels, the signals propagate in all directions. For the communication between Alice and Bob, an Eavesdropper can receive the signals from both Alice and Bob as far as the Eavesdropper is in the range determined by the transmitting power. Through phased array antenna with beam tracking circuits or cooperative iteration, the signals are confined near the straight line connecting the positions of Alice and Bob, so it will largely reduce the valid placement of an Eavesdropper. Sometimes, this reduction can be prohibitive for Eavesdropper to wiretap the channel since the reduced space can be readily protected. Two …

Strain Monitoring Of Concrete Components Using Embedded Carbon Nanofibers/Epoxy Sensors, Yanlei Wang, Yongshuai Wang, Baoguo Han, Baolin Wan, Gaochuang Cai, Zhizheng Li

Civil and Environmental Engineering Faculty Research and Publications

In this study, embedded strain sensors based on the principle of piezoresistivity were fabricated by epoxy-based composites filled with different contents of carbon nanofibers (CNFs). The piezoresistive performances and relevant parameters including gauge factor, linearity, repeatability and hysteresis of these sensors were investigated. A compensation circuit was proposed to eliminate the influence of temperature on sensing signals of the sensors. The CNFs/epoxy sensors were embedded into concrete cylinders to monitor their compressive strains under monotonic and cyclic loadings, thereby assessing practical applications of the CNFs/epoxy sensors as strain sensors for monitoring concrete structures. The results indicate that the sensors containing …

A New Thickness-Based Accelerated Aging Test Methodology For Resin Materials: Theory And Preliminary Experimental Study, Yanlei Wang, Xue Zhang, Gaochuang Cai, Baolin Wan, Danièle Waldmann, Yuan Qu

Civil and Environmental Engineering Faculty Research and Publications

This paper proposes a novel accelerated test method based on the thickness of resin materials. This method is to overcome the adverse influence of high temperature on the reliability of experimental results of the accelerated tests widely adopted in the current practice. To verify the proposed thickness-based accelerated method (ThAM), an experimental investigation was conducted focusing on the water absorption and tensile properties of epoxy resin. The results suggest that the existing temperature-based accelerated method (TAM) cannot be applied when the test temperature is high as in this case the degradation mechanism of materials is probably changed. The acceleration factor …

Developing A Multi-Purpose Moisture Meter On Ultra High Frequency., Kh.A Usmanova, A. Turgunbaev

Chemical Technology, Control and Management

The article deals with the problems of optimizing the design and structure of the moisture meter, which generally reduces to minimizing measurement errors by selecting the type of sample former and its basic parameters. The constructive, structural and algorithmic optimization methods proposed in the article allow to create a single unified complex of means for controlling the moisture content of fibrous and solid bulk materials that were used in the development of a multi-purpose microwave moisture meter for fibrous materials and granular products of the agro-industrial complex.

Cloud System Of Pilot Production Management Based On Internet Of Things., Michail V. Ovsiannikov, Serguey A. Podkopaev, Valery B. Tarassov

Chemical Technology, Control and Management

Some theoretical background of Industrial Internet and Cloud Computing opening new era in industrial automation is considered. A prototype of cloud system for IoT-enabled production management is presented. Its first version is based on Denford’s equipment for manufacturing education and SAP HANA Cloud Platform. Main functions of cloud production management system are discussed. An architecture of «Denford-BMSTU» CIM system is shown. Basic components of SAP HCP are analyzed to clarify its implementation. Communication protocols between CIM devices and cloud platform are noticed. Examples of dispatching production rules are given.

Construction Of Fuzzy Risk Assessment Models., T.F Bekmuratov, B.T Solieva

Chemical Technology, Control and Management

The tasks of making decisions on risk assessment, depending on the conditions of uncertainty, are divided into two types: decision-making tasks under conditions where the initial data are stochastic; decision-making tasks under conditions when the initial data are of a non-stochastic nature, and the necessary confidence limits for the parameters of the processes under investigation are unknown or unclear. In problems of the second type, risks are manifested to a greater extent than the first, since in solving problems it is necessary to take into account not only statistical uncertainty, but also linguistic. At the same time, one should consider …

Problems Of Developing The Multi Agent Systems In The Tasks Of Management Technological Processes And Productions., Sh.M Gulyamov, S.S Kasimov, N.B Usmanova, D.A Mirzaev

Chemical Technology, Control and Management

In this paper several issues related to the development of industrial multi-agent systems within scope of managing complex technological processes and production with taking into account: the variety of solution methods; the availability of variety of information subject to incomplete and dispersed nature of technological processes, uncertainty in models and wide range of time frames for various system tasks and production situations are considered. To show that or the full disclosure of the potential of multi-agent systems reconfigurable production systems with performance adaptation are in demand. The tasks of developing an agent architecture, its functional organization and creating an agent …