A5054344451- Magnetic properties of thin films
- Cellular Automata and Applications
- MXene and MAX Phase Materials
- Algorithms and Data Compression
- Advanced Data Storage Technologies
- Blind Source Separation Techniques
- Advanced Wireless Communication Techniques
- Semiconductor materials and devices
- Electromagnetic wave absorption materials
- Speech and Audio Processing
- Scientific Research and Discoveries
- Adhesion, Friction, and Surface Interactions
- Theoretical and Computational Physics
- Advanced MRI Techniques and Applications
- Advanced Thermodynamics and Statistical Mechanics
- Advanced Adaptive Filtering Techniques
- Energy Harvesting in Wireless Networks
- earthquake and tectonic studies
- Metabolism and Genetic Disorders
- Nonlinear Dynamics and Pattern Formation
- Dielectric materials and actuators
- Phase-change materials and chalcogenides
- Liquid Crystal Research Advancements
- 2D Materials and Applications
- Advanced Sensor and Energy Harvesting Materials
Drexel University
2024-2025
University of California, San Diego
1991-2002
Universidad Nacional de Asunción
1972-1975
Abstract The origin of MXene's excellent electromagnetic shielding performance is not fully understood. MXene films, despite being inhomogeneous at the nanometer scale, are often treated as if they compared to bulk conductors. It reasonable wonder treatment a homogeneous material remains valid very small film thickness and it depends on interlayer spacing. goal present work test model applicable nanometer‐thin Ti 3 C 2 T x films and, so, investigate how parameters may depend variations in...
Polyvinylidene fluoride (PVDF) is a semicrystalline polymer used in thin-film dielectric capacitors because of its inherently high constant and low loss tangent. Its can be increased by the formation alignment β-phase crystalline structure, which facilitated 2D nanofillers. carbides nitrides, MXenes, are promising candidates due to their notable permittivity ability increase interfacial polarization. Still, mixing challenging weak interactions poor dispersibility MXenes PVDF. This work...
Abstract The study reports novel photonic properties of Ti 3 C 2 T x MXene flakes horizontally self‐assembled within cellulose nanofiber (CNF) matrix exhibiting unique bright multispectral colors combined with overall high transparency in the transmission regime. intense reflection are reflected by individual acting as effective micromirrors shifts based on their subsurface positioning dielectric layers. Unique color appearances controlled an interplay multiple bandgaps formed constructive...
High density disk drive systems utilize fine grain polycrystalline thin films as storage medium. These exhibit noise that is pattern dependent and has appreciable magnitude near the center of each recorded transition. A model for error rates in a PRML channel presented to explore how variations medium parameters effect system performance. The assumed be characterized by both nonstationary white Gaussian electronic and/or head noise. Results are terms rate sensitivity changes parameters.<...
In high density magnetic recording, signals are often equalized to a partial response target of the form (1-D)(1+D)/sup n/ and then detected by Viterbi detector using Euclidean distance. The authors use ideas presented L.C. Barbosa (1989) estimate performance degradation several different equalizer targets for tape channel, thin film disk an ideal Lorentzian channel at range densities. 1+0.25D-0.75D/sup 2/-0.5D/sup 3/ is shown outperform EPR4 over large It that in absence coding there exists...
The microtrack model for transition noise with partial erasure in thin film media has been shown to be a useful tool simulating and analyzing detector performance under realistic conditions. However, several effects resulting from interactions between neighboring transitions are not accounted this model. These include broadening, increased noise, nonlinear shift (NLTS). A simple modification the incorporate demagnetization field of is presented. NLTS, broadening as well their interaction...
The class of partial response polynomials the form (1-D)(1+D)/sup n/ are evaluated in recording systems with both electronic noise and nonstationary media noise. detector performance for each polynomial is versus normalized density 100% noise, then Simple mathematical relations developed that show how to convert these results into plots contours constant areal density. In case it shown proper choice bit length width EPR4 yields lowest probability error at any Finally, a technique combining...
Intra-pattern and Inter-pattern demagnetization fields cause the appearance of Non-Linear Transition Shift (NLTS) Hard (HTS). Additional timing shifts at high frequency writing reinforce both intra-pattern inter-pattern non-linearities. A model describing interaction density transition for a dibit is proposed. Experimental results indicate strong between adjacent in series significant oscillations shift.
Abstract: In vivo 31 P magnetic resonance spectra of 16 isolated dog brains were studied by using a 9.4‐T wide‐bore superconducting magnet. The observed i peak had an irregular shape, which implied that it represented more than one single homogeneous pool . To evaluate our ability to discriminate between and multiple peaks determine areas, we designed studies simulated with the signal‐to‐noise (S/N) ratios ranging from ∞ 4.4 reference peak. For analysis used computer programs linear...
For high density magnetic recording systems, equalizing to partial response signals of the form (1-D)(1+D)/sup n/ and applying modulation codes with spectral nulls at DC Nyquist frequency have been proposed in Karabed Siegel (1991). The present authors consider using same DC/Nyquist-free codes, but class I polynomial, (1+D). They find that when received signal is detected by a Viterbi detector based upon trellis combines equalized channel constraint, simpler for performs comparably IV,...
Extremely high density magnetic recording is not well modeled by linear superposition. A model for nonlinearities in thick particulate media described, and a simple maximum likelihood detector to this channel derived. The authors first review the nonlinear of A. Armstrong et al., (1991) then describe architecture sequences estimator channel. It observed that further simplifications can be made when described terms partial response signals. Some simulation results obtained are reviewed.< <ETX...
The class of partial response polynomials the form (1-D)(1+D)/sup n/ are evaluated in recording systems with both electronic noise and nonstationary media noise. detector performance for each polynomial is versus normalized density 100% noise, then Simple mathematical relations developed that show how to convert these results into plots contours constant areal density. In case it shown proper choice bit length width EPR4 yields lowest probability error at any Finally, a technique combining...