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A byte sequence is worth an image: CNN for file fragment classification using bit shift and n-gram embeddings
Published 2024“…This is inherently inapt for classifying variable-length coding files whose symbols are represented as the variable number of bits. Conversely, we propose Byte2Image, a novel data augmentation technique, to introduce the neglected intra-byte information into file fragments and re-treat them as 2d gray-scale images, which allows us to capture both inter-byte and intra-byte correlations simultaneously through powerful convolutional neural networks (CNNs). …”
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Conference Paper -
2
Spin-ice physics and phase transitions in cadmium cyanide
Published 2019“…Cd(CN)<sub>2</sub> is shown here to display spin-ice physics at room temperature. </p> <p>Chapter 3 outlines the extreme sensitivity of Cd(CN)<sub>2</sub> to X-ray irradiation, including unit-cell contraction, and the selection or suppression of particular phase transitions. …”
Thesis -
3
Optical and core-level X-ray spectroscopy of correlated two-dimensional materials
Published 2024“…Frustrated exchange interactions result in a helimagnetic ground state and spin-induced ferroelectric order, making bulk NiI₂ a type-II multiferroic. …”
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Thesis -
4
Improved flux pinning properties of Mg exceed MgB2 ceramics with B4C and Dy2O3 additions
Published 2024“…According to collective pinning theory, δl pinning was identified as the dominant pinning type in the fabricated samples. …”
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Article -
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Synthetic, spectroscopic, biological and X-ray crystallographic structural studies on a novel pyridine-nitrogen-bridged dimeric nickel(II) complex of a pentadentate N3S2 ligand
Published 2001“…The Schiff base formed by condensation of 2,6-diacetylpyridine with S-benzyldithiocarbazate (H2SNNNS) behaves as a pentadentate ligand, forming a nickel(II) complex of empirical formula Ni(SNNNS)·H2O that is high-spin with a room-temperature magnetic moment of 2.93 B.M. …”
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Article -
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Non-markovian momentum computing: thermodynamically efficient and computation universal
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Journal Article -
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Crystalline boron-linked tetraaminoethylene radical cations
Published 2018“…Single-electron oxidation of neutral boryl-linked tetraaminoethylene derivatives 4 led to the formation of radical cations 4˙+, which have been isolated and fully characterized. X-ray diffraction analysis, EPR spectroscopy, and computational studies revealed that the unpaired electron is delocalized over the B2N4C2 skeleton and the spin density mainly resides on the carbon and boron atoms.…”
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Journal Article -
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Design and Development of an Accelerated Material Synthesis Platform for Automated Materials Research
Published 2024“…The synthesis and characterization methods are validated on a methylammonium lead iodide (MAPbI3) and formamidinium lead iodide (FAPbI3) perovskite material system. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and hyperspectral imaging measurements show equivalence between high-throughput synthesis and more traditional spin-coating methods. …”
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Thesis -
9
Electronic structure of paramagnetic transition metal complexes
Published 2017“…In Chapter 3, we address the question of redox-dependent spin transitions in triangular iron complexes. Experiments have shown that one-electron reduction of a pyrazolate-bridged Fe<sup>III</sup><sub>3</sub> cluster drives a transition from high- to low-spin configurations at all three metal centres. …”
Thesis -
10
Neutron emission studies from miniature and medium size plasma focus device
Published 2010“…From the perspective of being utilized as a non-intrusive and non-destructive scanning tool, the added advantage with plasma focus devices is also that hard X-Ray and neutron scanning can be done simultaneously as the emission of neutrons is always accompanied by hard X-Rays.…”
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Research Report -
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A Unified Approach to Learning Ising Models: Beyond Independence and Bounded Width
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Article -
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Topochemical manipulation of some complex transition metal oxides
Published 2016“…However, upon cooling (T &LT; 250 K) a phase transition is observed in which the nickel spins interact ferromagnetically, while the ruthenium cations appear to undergo a change in spin configuration to a diamagnetic spin state. …”
Thesis -
13
Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data
Published 2024“…Results are presented for a semicoherent search for continuous gravitational waves from the low-mass x-ray binary Scorpius X-1, using a hidden Markov model (HMM) to allow for spin wandering. …”
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Article -
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Influence of calcination temperature on nickel oxide nanoparticles synthesized by thermal treatment
Published 2015“…The magnetic properties were also investigated by electron spin resonance (ESR) spectroscopy, which confirmed the presence of unpaired electrons. …”
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Thesis -
15
Ultrafast dynamics in quantum materials probed by time-and-momentum-resolved techniques
Published 2024“…In this part of the thesis, I will introduce a new pathway for launching coherent acoustic phonons: magnetostriction, and discuss the spin-mediated shear oscillator enabled by this mechanism in van der Waals antiferromagnet. …”
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Thesis -
16
The effect of tuning the coordination sphere of iron complexes for the oxygen reduction reaction in acidic media
Published 2021“…Novel activity descriptors including the charge and spin densities on the Fe site were proposed and validated by available experimental data, presenting a strategy to design highly-active nonprecious metal complex catalysts with specific supporting ligands.…”
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Journal Article -
17
Pressure-Dependent Polymorphism and Band-Gap Tuning of Methylammonium Lead Iodide Perovskite
Published 2017“…We report the pressure-induced crystallographic transitions and optical behavior of MAPbI3 (MA=methylammonium) using in situ synchrotron X-ray diffraction and laser-excited photoluminescence spectroscopy, supported by density functional theory (DFT) calculations using the hybrid functional B3PW91 with spin-orbit coupling. …”
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Journal Article -
18
Electric field modulation of the tetragonal domain orientation revealed in the magnetic ground state of quantum paraelectric EuTiO3
Published 2013“…Signatures of metastability are visible in the heat capacity below the cubic-tetragonal phase transition at 283 K, supporting the evidence for a mismatch between long and short range structural order from previous x-ray diffraction studies. Employing the anisotropic magnetization as an indirect structural probe, we confirm the emergence of multiple orthogonal domains at low temperature. …”
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Journal Article -
19
Investigating the potential of cobalt-doped zinc oxide (Zn1-xCoxOδ) as a buffer layer for CZTS thin-film solar cells
Published 2024“…This work reports on the preparation and characterization of a cobalt-doped zinc oxide (Zn1-xCoxOδ) thin-film buffer layer using the spin-coating technique on ITO back contact glass substrates. …”
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Improving the charge separation and collection at the buffer/absorber interface by double-layered Mn-substituted CZTS
Published 2020“…In this study, Cu2MnxZn1-xSnS4 (CMZTS) thin film were fabricated by a sol-gel spin coating technique to understand the effect of Mn on the device performance. …”
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Journal Article