A5069029089- Acoustic Wave Phenomena Research
- Metamaterials and Metasurfaces Applications
- Speech and Audio Processing
- Cellular and Composite Structures
- Additive Manufacturing and 3D Printing Technologies
- Mechanical Behavior of Composites
- Advanced Malware Detection Techniques
- Network Security and Intrusion Detection
- Smart Grid Security and Resilience
- Composite Material Mechanics
- Modular Robots and Swarm Intelligence
- Behavioral Health and Interventions
- Thermal properties of materials
- Mathematics and Applications
- Hearing Loss and Rehabilitation
- Media Influence and Health
- Digital and Cyber Forensics
- Online and Blended Learning
- graph theory and CDMA systems
- Mechanical stress and fatigue analysis
- Antenna Design and Analysis
- Advanced Sensor Technologies Research
- Graphene research and applications
- Infrastructure Maintenance and Monitoring
- Radiation Effects in Electronics
Sandia National Laboratories
2022-2024
Gwinnett College
2024
Georgia Gwinnett College
2024
Stanford University
2023
University of Massachusetts Lowell
2017-2023
Research Complex at Harwell
1981
United Kingdom Atomic Energy Authority
1971-1974
A predictive design, analysis, and optimization tool that quickly accurately captures the frequency response of locally resonant metamaterials is presented. reduced order model based on a discrete spring-mass system used to relate structural parameters unit cell response, intended for optimizing structure with widest longitudinal stop band at desired center frequency. Design maps geometric performance metrics are assembled, from which optimized cells or paths enhanced functionality can be...
Abstract Student-created videos engage students’ interests, creativity, and content knowledge enrich collaborative learning in STEM education. These enhance critical thinking analytical skills, which are essential tools the fields of science, technology, engineering, mathematics (STEM). This study presents results such an assignment across several areas (biology, chemistry, exercise information mathematics) at a minority-serving, liberal arts higher education institution southeast region...
Ransomware attacks have become widespread in the last few years and affected many critical industries infrastructures. Unfortunately, there are no recovery tools that can effectively defend against all types of ransomware. Approaches, such as frequent data backups, several drawbacks. They expensive terms resources trained technical staff. Therefore, it is much more challenging cost-consuming for average users small business owners to survive ransomware attacks. To provide an easy-to-use tool...
Abstract People often struggle to do what they ideally want because of a conflict between their actual and ideal preferences. By focusing on maximizing engagement, recommendation algorithms appear be exacerbating this struggle. However, need not the case. Here we show that tailoring (vs. actual) preferences would provide meaningful benefits both users companies. To examine this, built algorithmic systems generated real-time, personalized recommendations tailored either person’s or Then,...
Optimization of functionally graded metamaterial arrays with a high dimensional and continuous geometric design space is cumbersome could be accelerated via machine learning tools. Mechanical metamaterials can manipulate acoustic or ultrasonic waves by introducing large dispersive attenuative effects near their natural frequency. In this work structures are designed optimized to combine the energy attenuation performance number unit cells varying frequency responses reduce interlayer...
Recent high profile cyber attacks on critical infrastructures have raised awareness about the severe and widespread impacts that these can everyday life. This has spurred research into making industrial control systems other cyber-physical more resilient. A plethora of resilience metrics frameworks been proposed for assessments, but approaches typically assume data required to populate is readily available, an assumption frequently not valid. paper describes a new experimentation platform be...
Nowadays ransomware has become a new profitable form of attack. This type malware acts as extortion which encrypts the files in victim's computer and forces victim to pay ransom have data recovered. Even companies tech savvy people must use extensive resources maintain backups for recovery or else they will lose valuable data, not mentioning average users. Unfortunately, any tool can effectively defend various types ransomware. To address this challenge, we propose novel defense mechanism...
People often struggle to live up their ideals because of a tension between what they actually want and ideally want. Unfortunately, rather than helping people with this, the way recommendation algorithms on social media are programmed may make this worse. However, need not be case. Here we show that tailoring ideal (vs. actual) preferences would provide meaningful benefits both users companies. To examine built algorithmic systems generated real-time, personalized recommendations tailored...
We show that an $n\times n$ circulant Hadamard matrix must satisfy a family of congruence equations have solutions only when $n \leq 4$, proving Ryser's 1963 conjecture no such matrices exist for $n>4$.
An accurate micromechanical material model for predicting a composite’s elastic properties is desired in order to determine the potential structural and economic benefits of an advanced resin system construction wind turbine blades. A MATLAB script GUI are implemented determination composite laminate based upon individual matrix reinforcement, as well fiber volume fraction. on periodic boundary conditions compared with classical rule mixture models cylinder model. The predicted available...
Mechanical metamaterials with tuned and functionally graded (FG) dynamic properties have potential for control of wave propagation in structures, as they exhibit behavior not normally observed homogenous natural materials. Along the structure, performance depends on base material properties, specifically density elastic modulus. DLP-based 3D printing has been shown a promising technique to manufacture complex composite structures high volume fraction reinforcements, which would be beneficial...
Scattering experiments can be leveraged to extract the effective properties of a heterogeneous metamaterial slab based on multi-point measurements in surrounding media. In this technique, two are made ambient media each side finite thickness micro-structured decompose incoming and outgoing waves. The method is applied an example with locally resonant inclusions while paying close attention parameters that influence extracted material parameters. It observed overall converge limiting values...