Engineering Commons^™

A Patch-Resonator-Based Butler Matrix With New Triangular Phase Shifters, Xianshi Jing, Li (Lijun) Jun Jiang, Sheng Sun, Lei Zhu

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, a new novel patch based Butler Matrix using 3-dB square-patch coupler and triangular-patch wideband phase shifter is presented. By inserting a via hole along the symmetrical plane of the triangular patch, the bandwidth of the transmitting response is significantly increased. In order to obtain a 45° phase difference and a wideband phase response, a reference line with high characteristic impedance is applied and the length of the feeding line for the triangular-patch structure is adjusted correspondingly. As an application, a patch-based Butler Matrix is designed and fabricated around 4 GHz. The measured patch-based Butler Matrix shows a …

A Highly Tunable Sub-Wavelength Chiral Structure For Circular Polarizer, Menglin L.N. Chen, Li (Lijun) Jun Jiang, Wei E.I. Sha, Tatsuo Itoh

Electrical and Computer Engineering Faculty Research & Creative Works

Chiral structures are composed of periodically arranged asymmetric particles. The asymmetry of chiral particles results in extraordinary properties like negative refraction index, giant optical activity and circular dichroism. Consequently, they have applications in super lens and various polarization controllers. There are two types of chiral structures, namely planar and 3D structures. The planar ones usually have three- or fourfold rotational symmetry, which limits the polarization tuning capability. On the other hand, the 3D prototypes are difficult to fabricate and measure. Here, we propose a highly tunable sub-wavelength 3D chiral structure. It can be conveniently manufactured on the single-layer double-side printed …

Finite-Difference Time-Domain Simulation Of The Maxwell-Schrödinger System, Christopher Ryu, Aiyin Liu, Weng C. Chew, Wei Sha, Lijun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

A thorough study on the finite-difference time-domain (FDTD) simulation of the Maxwell-Schrödinger system in the semi-classical regime is given. For the Maxwell part which is treated classically, an alternative approach directly using the vector and scalar potentials (A and Φ) is taken. This approach is stable in the long wavelength regime and removes the need to extract the potentials at every time step. Perfectly matched layer (PML) is developed for this system. For the Schrödinger and quantum mechanical part, minimal coupling is applied to couple the charges to the electromagnetic potentials. Simulation results agree with the theory of quantum coherent …

The Purdue Agro-Climatic (Pac) Dataset For The U.S. Corn Belt: Development And Initial Results, Xing Liu, Elin Jacobs, Anil Kumar, Larry Biehl, Jeff Andersen, Dev Niyogi

Department of Earth, Atmospheric, and Planetary Sciences Faculty Publications

This study is a result of a project titled ‘‘Useful to Usable (U2U): Transforming Climate Variability and Change Information for Cereal Crop Producers”. This paper responds to the project goal to improve farm resiliency and proftability in the U.S. Corn Belt region by transforming existing meteorological dataset into usable knowledge and tools for the agricultural community.

A high-resolution agro-climatic dataset that covers the U.S. Corn Belt was built for the U2U project based on a Land Data Assimilation System (LDAS) framework. This data referred to as the Purdue Agro-climatic (PAC) dataset is a gridded, continuous dataset suitable for agrocli- matic …

Designing Laboratories For Small Scale Digital Device Forensics, Richard P. Mislan, Tim Wedge

Annual ADFSL Conference on Digital Forensics, Security and Law

The ubiquity of small scale digital devices (SSDD), the public’s ever increasing societal dependence on SSDD, and the continual presence of SSDD at all types of crime scenes, including non-technical and violent crimes, demand a formalized curriculum for the education and training of future cyber forensic examiners. This paper presents the various SSDD forensics labs currently in use and under development for future use at the Purdue University Cyber Forensics Laboratory. The primary objective of each module is to provide specific real-world cases for the learning, comprehension, and understanding of hands-on investigative techniques and methodologies. The purpose of this paper …

Network Forensic Investigation Of Internal Misuse/Crime In Saudi Arabia: A Hacking Case, Abdulrazaq Al-Murjan, Konstantinos Xynos

Annual ADFSL Conference on Digital Forensics, Security and Law

There are ad-hoc guidelines and a limited policy on computer incident response that does not include computer forensic preparation procedures (e.g. logging incidents). In addition, these guidelines do not consider the requirement of Islamic law for admissible evidence at an organisational level in Saudi Arabia. Network forensic investigation might breach the Saudi law if they follow ad-hoc or international digital forensic standards such as Association of Chief Police Officers (ACPO) guidelines. This might put the organisation in a costly situation when a malicious employee sues an Islamic court. This is because the law of Saudi Arabia is complying with Islamic …

New Visiting Scholar | Engineering Education, Usu College Of Engineering

College of Engineering News

Professor Jacek Uziak is currently a visiting scholar in the Department of Engineering Education at Utah State University. He is helping the Department in the design of a Graduate Certificate in Engineering Education to be offered as an online program starting next fall. He is also collaborating with different faculty in various areas of Engineering Education research including the teaching of mechanics, engineering leadership, and application of learning management systems (LMS).

Collapse Resistance Of Moment Resisting Frame And Shear Wall Rc Structural Systems Exposed To Blast, Alaa I. Chehab, Christopher D. Eamon, Joshua Griffin

Civil and Environmental Engineering Faculty Research Publications

Various characteristics of a structure influence its response when subjected to a blast load. This has important implications for survivability and resistance to progressive collapse. In this study, the effect of the type of lateral load resisting system on reinforced concrete building resistance to progressive collapse when exposed to blast load is examined. Fourteen different reinforced concrete structures were considered for analysis, with five structures designed as moment resisting frames and nine designed as shear walls systems. Buildings with 3, 6, and 10 stories with 3, 4, and 5-bay symmetric configurations were considered. The structures were exposed to external and …

E. Coli Removal By Pleurotus Ostreatus Mycofilter In Simulated Wet Environmental Pond, Savannah E. Martinez

Civil Engineering ETDs

Stormwater runoff has been referred to as the water quality issue of the day. Contamination of surface waters is an environmental concern for both human and ecosystem health. In Albuquerque, New Mexico, it is a common practice to pond stormwater runoff before it is released into the Rio Grande. Ponding stormwater works as a best management practice (BMP) to help remove floatable debris and contaminants. Mycofiltration is a BMP that has recently been introduced into the stormwater quality community. Mycofiltration is the use of fungal mycelium as a natural mitigation approach to stormwater pollution. Mycofiltration has been proven to reduce …

Evolution From The Plasmon To Exciton State In Ligand-Protected Atomically Precise Gold Nanoparticles, Meng Zhou, Chenjie Zeng, Yuxiang Chen, Shuo Zhao, Matthew Y. Sfeir, Manzhou Zhu, Rongchao Jin

Publications and Research

The evolution from the metallic (or plasmonic) to molecular state in metal nanoparticles constitutes a central question in nanoscience research because of its importance in revealing the origin of metallic bonding and offering fundamental insights into the birth of surface plasmon resonance. Previous research has not been able to probe the transition due to the unavailability of atomically precise nanoparticles in the 1-3 nm size regime. Herein, we investigate the transition by performing ultrafast spectroscopic studies on atomically precise thiolate-protected Au₂₅, Au₃₈, Au₁₄₄, Au₃₃₃, Au_∼520 and Au_∼940 nanoparticles. Our results …

Making Scholarly Activity Available To The Masses: The Scaffolding Of Scholarship Throughout The Undergraduate Curriculum, Michael Savarese, Trent R. Brown, Carolyn Culbertson, Anna Carlin

Florida Statewide Symposium: Best Practices in Undergraduate Research

Florida Gulf Coast University’s Quality Enhancement Plan (QEP) focuses on improving student critical thinking, information literacy, and written communication. Rather than developing these skills through traditional methods (e.g., through senior-level, independent research), these learning outcomes are practiced through scholarly experiences. Traditional undergraduate scholarship manifests itself through terminal, senior capstone or research experiences. These, because of the economy of scale, typically reach a minority of students, often just honors students or those approached by faculty mentors. At FGCU, however, scholarly experiences are a part of the curriculum throughout the program of study, and scaffolded to build greater depth and sophistication. Presented …

Price Controls Through The Back Door: The Parallel Importation Of Pharmaceuticals, A. Bryan Baer

Georgia Journal of Law & Technology

No abstract provided.

Xml Schemas And Computer Language Copyright: Filling In The Blanks In Blank Esperanto, Douglas E. Phillips

Georgia Journal of Law & Technology

No abstract provided.

A New Multiple Access Wiretap Channel Model, Mohamed Nafea, Aylin Yener

Electrical and Computer Engineering Faculty Research & Creative Works

A new model for the two-user multiple-access wiretap channel is considered. In this model, the legitimate (main) channel is a discrete memoryless channel (DMC), and the wiretapper chooses a fixed-length subset of the channel uses where she has perfect access to the transmitted symbols of both users, while observing the remainder of the transmitted codewords through a second DMC. As such, it generalizes the existing multiple-access wiretap channel models and extends the recently proposed new wiretap channel model to a multiple access setting. An achievable strong secrecy rate region for the model is derived. The achievability is established by solving …

Annual Pumpkin Toss Combines Fall, Physics And Fun | College Of Engineering, Usu College Of Engineering

College of Engineering News

News Release – LOGAN, UTAH, Oct. 20, 2016 – Autumn is in the air. Er, no wait. ... That’s a flying pumpkin.

Engineering students from across Utah will compete Saturday, Oct. 29 to see who can hurl their ripening jack-o’-lanterns the farthest.

Feasibility Study Of Land Cover Classification Based On Normalized Difference Vegetation Index For Landslide Risk Assessment, Thilanki Dahigamuwa, Qiuyan Yu, Manjriker Gunaratne

Civil and Environmental Engineering Faculty Publications

Unfavorable land cover leads to excessive damage from landslides and other natural hazards, whereas the presence of vegetation is expected to mitigate rainfall-induced landslide potential. Hence, unexpected and rapid changes in land cover due to deforestation would be detrimental in landslide-prone areas. Also, vegetation cover is subject to phenological variations and therefore, timely classification of land cover is an essential step in effective evaluation of landslide hazard potential. The work presented here investigates methods that can be used for land cover classification based on the Normalized Difference Vegetation Index (NDVI), derived from up-to-date satellite images, and the feasibility of application …

Global Ocean Particulate Organic Carbon Flux Merged With Satellite Parameters, Colleen B. Mouw, Audrey Barnett, Galen A. Mckinley, Lucas Gloege, Darren Pilcher

Michigan Tech Publications, Part 1

Particulate organic carbon (POC) flux estimated from POC concentration observations from sediment traps and 234 Th are compiled across the global ocean. The compilation includes six time series locations: CARIACO, K2, OSP, BATS, OFP, and HOT. Efficiency of the biological pump of carbon to the deep ocean depends largely on biologically mediated export of carbon from the surface ocean and its remineralization with depth; thus biologically related parameters able to be estimated from satellite observations were merged at the POC observation sites. Satellite parameters include net primary production, percent microplankton, sea surface temperature, photosynthetically active radiation, diffuse attenuation coefficient at …

Polymer-Coated Therapeutic Nanoparticles, Sutapa Barua

Chemical and Biochemical Engineering Faculty Research & Creative Works

Polymer-coated therapeutic nanoparticles, methods of making and using the same are provided. The polymer-coated therapeutic nanoparticles can include an inner core having at least one therapeutic agent and an outer polymeric coating covering at least a portion of the inner core. A targeting molecule can be associated with the outer polymeric coating.

Hydroshare – A Case Study Of The Application Of Modern Software Engineering To A Large Distributed Federally-Funded Scientific Software Development Project, Ray Idaszak, David G. Tarboton, Hong Yi, Laura Christopherson, Michael J. Stealey, Brian Miles, Pabitra Dash, Alva Couch, Calvin Spealman, Jeffery S. Horsburgh, Daniel P. Ames

Civil and Environmental Engineering Faculty Publications

HydroShare is an online collaborative system under development to support the open sharing of hydrologic data, analytical tools, and computer models. With HydroShare, scientists can easily discover, access, and analyze hydrologic data and thereby enhance the production and reproducibility of hydrologic scientific results. HydroShare also takes advantage of emerging social media functionality to enable users to enhance information about and collaboration around hydrologic data and models. HydroShare is being developed by an interdisciplinary collaborative team of domain scientists, university software developers, and professional software engineers from ten institutions located across the United States. While the combination of non–co-located, diverse stakeholders …

Investigation Of Future Flow Reducer Sizes In Houses Added To An Existing Gravity Flow Water System To Ensure Its Sustainability, Michelle Roy

USF Tampa Graduate Theses and Dissertations

Goal 6 of the United Nations Development Program’s new Sustainable Development Goals aims to ensure availability of clean water and sustainable management practices to all by the year 2030. Peace Corps Panama partners with communities in order to help provide sustainable water solutions to communities in need. Water, Sanitation, and Hygiene (WASH) Volunteers spend at least two years living in a community to identify and implement solutions to water problems and train local water committees on how to maintain their improved systems. A common solution for unequal distribution of flow in the distribution network of a gravity flow water system …

Comparison Of The Modes And Mechanisms Of Degradation Of Experimental C-Si Pv Modules With Various Encapsulants, October 2016, Florida Solar Energy Center, Neelkanth Dhere

FSEC Energy Research Center®

Seven modules with different encapsulants, provided by the National Renewable Energy Laboratory (NREL), were installed at the Florida Solar Energy Center (FSEC) outdoor test facility for long-term durability testing in the hot and humid climate of Florida. Along with the modules, NREL also provided corresponding load resistors, junction boxes, and module connections. The modules were installed at latitude tilt, on a south facing rack on March 20, 2014.During project different types of tests such as visual inspection in environmental conditions and infrared imaging and I-V characterization were carried out on the seven module

Drive Time

SIGNED: The Magazine of The Hong Kong Design Institute

The Vocational Training Council, HKDI's parent body, has recently formed an alumni association that includes Chelsia Lau, a graduate of Lee Wai Lee Technical Institute who has become one of the world's most accomplished automotive designers. She talked to Summer Cao about her twenty years with the Ford Motor Company.

Congratulations A-Pin Recipients | College Of Engineering, Usu College Of Engineering

College of Engineering News

Oct. 18, 2016 – Interim Dean Jagath Kaluarachchi and department heads from across the College of Engineering on Tuesday recognized 28 students for receiving the prestigious A-Pin award.

The A-Pin is one of the oldest awards at Utah State University. Initiated in 1910, it acknowledges and rewards students who achieve a straight-A grade point average while carrying 15 graded credit hours for two consecutive semesters.

Solvent And Method For Removal Of An Acid Gas From A Fluid Stream, Joseph Eugene Remias, Cameron Anthony Lippert, Kunlei Liu

Center for Applied Energy Research Faculty Patents

A solvent for removal of an acid gas from a fluid stream includes a promoter amine with a pKa of between 6.5 and 10.5 and a tertiary amine with a pKa of between 8.5 and 10.5.

Beams, Bobby (Fa 955), Manuscripts & Folklife Archives

Folklife Archives Finding Aids

Finding aid only for Folklife Archives Project 955. Paper titled: “Sawmills Past and Present in Hart, southern LaRue, and western Green County.” Includes description, terms, illustration, and photos of sawmills in the Penny Royal Region of Kentucky.

Protocol Guided Trace Analysis For Post-Silicon Debug Under Limited Observability, Yuting Cao Cao

USF Tampa Graduate Theses and Dissertations

This thesis considers the problem of reconstructing system level behavior of an SoC design from a partially observed signal trace. Solving this problem is a critical activity in post-silicon validation, and currently depends primarily on human creativity and insights. In this thesis, we provide algorithms to automatically infer system level flows from incomplete, ambiguous, and noisy trace data. This thesis also demonstrates the approach on two case studies, a multicore SoC model developed within the within the GEM5 environment, and a cycle accurate register transfer level model of a similar SoC design.

Electrical & Computer Engineering News, Georgia Southern University

Electrical & Computer Engineering: News & Publications (2014-2023)

• Strikes, Spares & SWE

Powers, Doug (Fa 954), Manuscripts & Folklife Archives

Folklife Archives Finding Aids

Finding aid only for Folklife Archives Project 954. Paper titled: “Montgomery’s Mill.” Includes description, terms illustration, and photos of Montgomery’s Mill in Green County, Kentucky.

Harbison, Kay (Fa 957), Manuscripts & Folklife Archives

Folklife Archives Finding Aids

Finding aid only for Folklife Archives Project 957. Paper titled: “Watermills.” Includes survey sheets of descriptions of watermills in Metcalfe County, Kentucky. Sheets include a description, informant’s name, terms, and a photo of a watermill.

Comparing Machine Learning And Logistic Regression Methods For Predicting Hypertension Using A Combination Of Gene Expression And Next-Generation Sequencing Data, Elizabeth Held, Joshua Cape, Nathan L. Tintle

Faculty Work Comprehensive List

Machine learning methods continue to show promise in the analysis of data from genetic association studies because of the high number of variables relative to the number of observations. However, few best practices exist for the application of these methods. We extend a recently proposed supervised machine learning approach for predicting disease risk by genotypes to be able to incorporate gene expression data and rare variants. We then apply 2 different versions of the approach (radial and linear support vector machines) to simulated data from Genetic Analysis Workshop 19 and compare performance to logistic regression. Method performance was not radically …