A5100372595- Epoxy Resin Curing Processes
- Mechanical Behavior of Composites
- Additive Manufacturing and 3D Printing Technologies
- Synthesis and properties of polymers
- Bone Tissue Engineering Materials
- Material Properties and Processing
- Polymer Nanocomposites and Properties
- Advanced Cellulose Research Studies
- Coding theory and cryptography
- Mental Health and Psychiatry
- Injection Molding Process and Properties
- Advanced Wireless Communication Techniques
- Lubricants and Their Additives
- Tribology and Wear Analysis
- Network Security and Intrusion Detection
- Fiber-reinforced polymer composites
- Polymer crystallization and properties
- Interconnection Networks and Systems
- Personality Disorders and Psychopathology
- Parallel Computing and Optimization Techniques
- Orthopaedic implants and arthroplasty
- Psychosocial Factors Impacting Youth
- Access Control and Trust
- Education, Achievement, and Giftedness
- Bone health and treatments
University of Southern California
2003-2020
Cornell University
2011-2019
University of Michigan
2018
Georgia Institute of Technology
2017
Sierra Engineering (United States)
2007
Southern California University for Professional Studies
2004
Rice University
2000
Andrews University
1996
Engineering Systems (United States)
1988
While two factors are currently thought to underlie individual differences in schizotypal personality, three may best explain traits. This study used confirmatory factor analysis assess five competing models of personality the general population: null model, one-factor simple two-factor Kendler and three-factor model. The computer program LISREL was analyze Schizotypal Personality Questionnaire subscale scores that reflect nine traits personality. were obtained from (1) a sample 822...
The DETER testbed is shared infrastructure designed for medium-scale repeatable experiments in computer security, especially those that involve malicious code. provides unique resources and a focus of activity an open community academic, industry, government researchers working toward better defenses against attacks on our networking infrastructure, critical infrastructure. This paper presents experience with the deployment operation testbed, highlights some research conducted discusses...
Silica (SiO2) nanoparticles densely grafted with amphiphilic organic chains are used to create a family of organic-inorganic hybrid lubricants. Short sulfonate-functionalized alkylaryl covalently tethered the particles form dense corona brush that stabilizes them against aggregation. When these dispersed in poly-α-olefin (PAO) oligomers, they homogeneous nanocomposite fluids at both low and high particle loadings. By varying volume fraction SiO2 nanostructures PAO nanocomposites, we show...
Polymer nanocomposites containing nanoparticles smaller than the random coil size of their host polymer chains are known to exhibit unique properties, such as lower viscosity and glass transition temperature relative neat melt. It has been hypothesized that these unusual properties result from fast diffusion nanostructures in polymer, which facilitates chain relaxation by constraint release other processes. In this study, effects addition sterically stabilized inorganic entangled...
Recombinant human transforming growth factor β1 (TGF-β1) was incorporated into microparticles of blends poly(DL-lactic-co-glycolic acid) (PLGA) and poly(ethylene glycol) (PEG) to create a delivery vehicle for the factor. The entrapment efficiency TGF-β1 in containing 5% PEG 40.3 ± 1.2% loading density 6.0 ng/1 mg microparticles. For same loading, 17.9 0.6 32.1 2.5% loaded released after 1 8 days, respectively, followed by plateau remaining 3 weeks. Rat marrow stromal cells showed dose...
Abstract Papillary thyroid cancer (PTC) is one of the most common endocrine malignancies associated with significant morbidity and mortality. Although multiple studies have contributed to a better understanding genetic alterations underlying this frequently arising disease, downstream molecular effectors that impact PTC pathogenesis remain be further defined. Here, we report regulator cell fate specification, PROX1, becomes inactivated in through mRNA downregulation cytoplasmic...
Over the past decade, increasing use of continuous fiber-reinforced polymer composites has created a demand for manufacturing methods with lower costs, higher production rates, and improved processing efficiency. To meet growing demands, vacuum bag only (VBO) prepreg been proposed implemented in industrial settings. However, absence high consolidation pressure, VBO must undergo compaction longer durations during cure requires more elaborate schemes to conform complex geometries. The main...
Three aerospace grade resins were formulated to investigate the effects of variation in DDS isomers, amine‐to‐epoxy (a/e) stoichiometric ratio, out‐time, and moisture absorption on processing characteristics cured resin properties. Such are typically used prepreg or preimpregnated composite fibers, which require engineered methods fully impregnate fiber bed during cure. Precure phenomena, specifically out‐time absorption, generally unavoidable practice, these phenomena investigated determine...
An SIMD array processor augmented with bypass connections, called mesh connections (MBC), is presented. This architecture reduces the diameter of n*n from O(n) to O(1). MBC significantly improves performance processor, especially in global operations; finding a minimum/maximum, average and sum take O(log/sub 2/n) time, which require ordinary O(n/sup 1/3/) multiple broadcast. Matrix multiplication can be done time. Image processing operations such as histogramming, median row finding,...
The authors present a multidimensional orthogonal multiprocessor (OMP) conceived for massively parallel computation. OMP compares favorably with the generalized hypercube and spanning-bus hypercube. All three architectures extend original concept of binary n-cube. Among three, requires equal or less hardware yet presents some interesting application potentials in architecture is viable alternative to conventional single-instruction multiple-data (SIMD) array computers which use distributed...
This paper presents an authorization framework for supporting fine-grained access control policies enhanced with light-weight intrusion/misuse detectors and response capabilities. The intercepts analyzes requests dynamically adjusts security to prevent attackers from exploiting application level vulnerabilities. We present a practical, flexible implementation of the based on Generic Authorization Access Control API (GAA-API) that provides dynamic intrusion capabilities many applications. To...
The effects of post-infusion dwell on vacuum infusion thermoset composites toughened by non-woven thermoplastic interlaminar veils were investigated. Permeability measurements and simulation the resin process demonstrated that toughening interlayers can effectively act as flow distribution media. Local variations in permeability induced non-uniform fronts, resulting high porosity. However, introduction a low-temperature allowed more time for to equilibrate pressure redistribute during...
We present a planar, self-reconfigurable modular robot with onboard processing, sensing, communication, and passive components for actuation. Modules consist primarily of flexible printed circuit board rolled in loop that is populated all electronic 12 simplified electro-permanent magnets mobility communication. The PCB eases assembly introduces compliance safe interaction external objects other modules, as well configuration large scale lattice configurations beyond what the manufacturing...
Out-time and moisture absorption in prepregs are generally unavoidable an industrial setting, where prepreg layup can take weeks. The resin cross-linking viscosity increase that occurs during out-time reduce flow a specified cure cycle, causing porosity. In this study, flow-optimized cycle was developed, leveraging both level time out-of-autoclave (OoA) processing. First, predictive kinetics models were used to model evolution under selected conditions, accounting for initial out-times...