A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Filters
Online Supplemental for Han & Pollock (2019)
[article]
2020
Figshare
Preserved Fulltext
Appendices for the manuscript "As Good As It Gets: The Behavioral Consequences of Positional Inconsistency Across Status Hierarchies" by Jung-Hoon Han and Tim Pollock, to be published at the Academy of ...
doi:10.6084/m9.figshare.11662743
fatcat:quvtujaejfe6bpl6ba5eaktf7a
Phases of Mott-Hubbard bilayers
[article]
2006
arXiv
pre-print
Preserved Fulltext
The Internet Archive has a preservation copy of this work in our general collections.
The file type is application/pdf.
A phase diagram of two Mott-Hubbard planes interacting with a short-range Coulomb repulsion is presented. Considering the case of equal amount of doping by holes in one layer as electrons in the other, a holon-doublon inter-layer exciton formation is shown to be a natural consequence of Coulomb attraction. Quasiparticle spectrum is gapped and incoherent below a critical doping δ_c due to the formation of excitons. A spin liquid insulator (SLI) phase is thus realized without the lattice
arXiv:cond-mat/0605426v1
fatcat:v26uavsttfekhfcv6ojgecw5a4
more »
... on. The critical value δ_c sensitively depends on the inter-layer interaction strength. In the tJ model description of each layer with the d-wave pairing, δ_c marks the crossover between SLI and d-wave superconductor. The SLI phase, despite being non-superconducting and charge-gapped, still shows electromagnetic response similar to that of a superfluid due to the exciton transport. Including antiferromagnetic order in the tJ model introduces magnetically ordered phases at low doping and pushes the spin liquid phase to a larger inter-layer interaction strength and higher doping concentrations.
Fluctuation-dissipation Type Theorem in Stochastic Linear Learning
[article]
2021
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
The fluctuation-dissipation theorem (FDT) is a simple yet powerful consequence of the first-order differential equation governing the dynamics of systems subject simultaneously to dissipative and stochastic forces. The linear learning dynamics, in which the input vector maps to the output vector by a linear matrix whose elements are the subject of learning, has a stochastic version closely mimicking the Langevin dynamics when a full-batch gradient descent scheme is replaced by that of
arXiv:2106.02220v1
fatcat:lbjdhnnwm5hrjeu5enimqzjxvu
more »
... gradient descent. We derive a generalized FDT for the stochastic linear learning dynamics and verify its validity among the well-known machine learning data sets such as MNIST, CIFAR-10 and EMNIST.
Magnetic response of the J1-J2 spin Hamiltonian from classical Monte Carlo and Schwinger boson mean field theory
[article]
2009
arXiv
pre-print
Preserved Fulltext
The Internet Archive has a preservation copy of this work in our general collections.
The file type is application/pdf.
Magnetic susceptibilities at several potential ordering wave vectors (0,0), (\pi,0), and (\pi,\pi) are analyzed for the antiferromagnetic J1-J2 spin Hamiltonian by classical Monte Carlo and Schwinger boson mean field theories over the parameter range 0 \le 2J_2/J_1 \le 2. We find a nearly linear-T behavior of the uniform susceptibility that extends up to the temperature scale of J_1 within both calculation schemes when 2J_2/J_1 is sufficiently removed from the critical point 2J_2/J_1=1. The
arXiv:0904.3809v1
fatcat:34ieuftyhvfbnhtxr3erb2vk6u
more »
... ow of linear temperature dependence diminishes as the critical point is approached.
A BROADBAND TECHNIQUE FOR A DECOUPLING NETWORK IN A COMPACT ANTENNA ARRAY IN A MIMO SYSTEM
2014
Progress In Electromagnetics Research C
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Decoupling networks (DNs) have frequently been used to obtain high isolation performance between coupled antennas in multiple-input multiple-output (MIMO) systems due to their advantage of spatial efficiency, which is particularly important for mobile devices. However, conventional DNs suffer from narrowband limitations. In this paper, a broadband decoupling technique is proposed that broadens the isolation bandwidth using a parallel resonant point. A 1.95 GHz MIMO antenna system with 460 MHz
doi:10.2528/pierc14042901
fatcat:ui6a2vkavfhwtbhv6xw2yg4qkq
more »
... bandwidth (fractional bandwidth, FBW = 23.6%) is designed and measured using the scattering parameters. The isolation is found to be better than −15 dB, while the reflection coefficient is better than −6 dB. Furthermore, the antenna efficiency and envelope correlation coefficient (ECC) are evaluated in a reverberation chamber.
Slave rotor theory of antiferromagnetic Hubbard model
[article]
2006
arXiv
pre-print
Preserved Fulltext
The Internet Archive has a preservation copy of this work in our general collections.
The file type is application/pdf.
The slave-rotor mean-field theory of Florens and Georges is generalized to the antiferromagnetic phase of the Hubbard model. An effective action consisting of a spin rotor and a fermion is derived and the corresponding saddle-point action is analyzed. Zero-temperature phase diagram of the antiferromagnetic Hubbard model is presented. While the magnetic phase persists for all values of the Hubbard interaction U, the single-particle spectral function exhibits a crossover into an incoherent phase
arXiv:cond-mat/0605266v1
fatcat:oj3fzaslgvddlkljlr3etm74bi
more »
... hen the magnetic moment m (and the corresponding U values) lies within a certain window m_c < m < 1-m_c, indicating a possible deviation from the Hartree-Fock theory.
Statistical recovery of the classical spin Hamiltonian
[article]
2018
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
We propose a simple procedure by which the interaction parameters of the classical spin Hamiltonian can be determined from the knowledge of four-point correlation functions and specific heat. The proposal is demonstrated by using the correlation and specific heat data generated by Monte Carlo method on one- and two-dimensional Ising-like models, and on the two-dimensional Heisenberg model with Dzyaloshinkii-Moriya interaction. A recipe for applying our scheme to experimental images of
arXiv:1807.04884v1
fatcat:huckxruskzbsfmzsgrfr53fthq
more »
... ion such as those made by magnetic force microscopy is outlined.
Direct cellular delivery of human proteasomes to delay tau aggregation
2014
Nature Communications
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
The 26S proteasome is the primary machinery that degrades ubiquitin (Ub)-conjugated proteins, including many proteotoxic proteins implicated in neurodegeneraton. It has been suggested that the elevation of proteasomal activity is tolerable to cells and may be beneficial to prevent the accumulation of protein aggregates. Here we show that purified proteasomes can be directly transported into cells through mesoporous silica nanoparticle-mediated endocytosis. Proteasomes that are loaded onto
doi:10.1038/ncomms6633
pmid:25476420
fatcat:ayfvkgthqvg5lpkkrzctmujqki
more »
... rticles through non-covalent interactions between polyhistidine tags and nickel ions fully retain their proteolytic activity. Cells treated with exogenous proteasomes are more efficient in degrading overexpressed human tau than endogenous proteasomal substrates, resulting in decreased levels of tau aggregates. Moreover, exogenous proteasome delivery significantly promotes cell survival against proteotoxic stress caused by tau and reactive oxygen species. These data demonstrate that increasing cellular proteasome activity through the direct delivery of purified proteasomes may be an effective strategy for reducing cellular levels of proteotoxic proteins.
Colon Cancer After Acute Diverticulitis Treatment
2013
Annals of Coloproctology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2014; you can also visit the original URL.
The file type is application/pdf.
Diverticulitis is the most common clinical complication of diverticular disease, affecting 10-25% of the patients with diverticula. The prevalences of diverticulitis and colon cancer tend to increase with age and are higher in industrialized countries. Consequently, diverticulitis and colon cancer have been reported to have similar epidemiological characteristics. However, the relationship between these diseases remains controversial, as is the performance of routine colonoscopy after an
doi:10.3393/ac.2013.29.4.167
pmid:24032118
pmcid:PMC3767867
fatcat:tud3jgfz7fbffiomoqx5asjlym
more »
... of diverticulitis to exclude colon cancer. Recently, we experienced three cases of colon cancer after treating acute diverticulitis, based on which we suggest the importance of follow-up colonoscopy after acute diverticulitis.
Classical Ring-exchange Processes on the Triangular Lattice
[article]
2006
arXiv
pre-print
Preserved Fulltext
The Internet Archive has a preservation copy of this work in our general collections.
The file type is application/pdf.
The effects of the ring-exchange Hamiltonian H_3 = J_3 sum_ (S_i * S_j) (S_i * S_k) on the triangular lattice are studied using classical Monte Carlo simulations. Each spin S_i is treated as a classical XY spin taking on Q equally spaced angles (Q-states clock model). For Q=6, a first-order transition into a stripe-ordered phase preempts the macroscopic classical degeneracy. For Q > 6, a finite window of critical phase exists, intervening between the low-temperature stripe phase and the high-temperature paramagnetic phase.
arXiv:cond-mat/0606433v1
fatcat:qut5hrz2azgjzi4ydxk4ndlfoa
Endothelial Dysfunction Is Associated With Major Adverse Cardiovascular Events in Peritoneal Dialysis Patients
2014
Medicine
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
Endothelial dysfunction is implicated in increased cardiovascular risk in nondialyzed population. However, the prognostic impact of endothelial dysfunction on cardiovascular outcome has not been investigated in peritoneal dialysis (PD) patients. We prospectively determined endothelial function by brachial artery endothelium-dependent vasodilation (flow-mediated dilation [FMD]) in 143 nondiabetic PD patients and 32 controls. Primary outcome was a major adverse cardiac and cerebrovascular event
doi:10.1097/md.0000000000000073
pmid:25192486
pmcid:PMC4616272
fatcat:qqlgw4eprfcdtn2ardphog5vau
more »
... ACCE). Brachial FMD was significantly lower in PD patients than in controls (2.9% [1.3-4.7] vs 6.2% [5.4-8.3], P < 0.001). During a mean follow-up of 42 months, primary outcome was observed in 25 patients (17.5%). When patients were dichotomized by the median value of FMD (2.9%), incidence rates of MACCEs were significantly higher in the group with lower FMD compared with higher FMD (7.2 vs 3.0/100 person-years, P = 0.03). In multivariate Cox analysis, low FMD (≤2.9%) was a significant independent predictor of MACCEs (hazard ratio = 2.73, 95% confidence interval = 1.03-7.22, P = 0.04). Furthermore, multivariate fractional polynomial analysis showed that the risk of MACCE decreased steadily with higher FMD values. Impaired brachial FMD was a significant independent predictor of MACCEs in PD patients. Estimating endothelial dysfunction by brachial FMD could be useful for stratifying cardiovascular risk in these patients.
Novel Feed Network for Circular Polarization Antenna Diversity
2014
IEEE Antennas and Wireless Propagation Letters
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
In this letter, we propose a novel feed network for circular polarization (CP) diversity antennas to enhance communications performances. The previous CP diversity systems adopted dual polarization diversity using right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) within a small space. However, the same rotational CPs need further antenna distance. To overcome the space limitation for the same CP diversity antenna, we propose a feed network for CP antenna using
doi:10.1109/lawp.2014.2323399
fatcat:kxubr6ficncb5ad6v2mqojbqfa
more »
... nventional CP with orthogonal polarization radiation characteristics of a linear polarization (LP) diversity system without additional antennas. The port isolation characteristics and impedance matching conditions are numerically verified for the diversity system and antenna characteristics. The proposed feed network with CP patch antennas is fabricated and measured in a reverberation chamber for diversity performances, and their validity is verified. Index Terms-Circular polarization, diversity, feed network, multiple-input-multiple-output (MIMO).
AZIMUTH BEAM PATTERN SYNTHESIS FOR AIRBORNE SAR SYSTEM OPTIMIZATION
2010
Electromagnetic Waves
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2011; you can also visit the original URL.
The file type is application/pdf.
The limitation of the pulse repetition frequency (PRF) of an airborne synthetic aperture radar (SAR) system is not a serious problem to obtain high azimuth resolution and wide swath imaging compared with a spaceborne SAR system. Hence, continuous high azimuth resolution imagery over a wide area can be obtained using an antenna having a wide beamwidth. Since a small antenna with a large beamwidth has very low gain, which results in difficulty in detection; the azimuth beam pattern optimization
doi:10.2528/pier10061901
fatcat:kjniy7nwujbdrfmu3ermbzgb5m
more »
... a large active phased array antenna is needed for airborne SAR system optimization. To improve the airborne SAR system performance, such as the noiseequivalent sigma zero (N Eσ 0 ), the azimuth resolution, the radiometric accuracy (RA), and the azimuth ambiguity ratio (AAR), we present an optimal azimuth beam pattern mask template and suggest an azimuth beam pattern satisfying the mask template using the particle swarm optimization (PSO). The mode having the proposed beam pattern guarantees continuous and high resolution images, simultaneously.
Cortical Thickness Reduction in Individuals at Ultra-High-Risk for Psychosis
2009
Schizophrenia Bulletin
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
Jung et al. ...
The authors also gratefully acknowledge the technical support of Yong-Sik Jung, Kiho Im, and Sun Hyung Kim. Fig. 1 . 1 Mean Cortical Thickness in 3 Groups for Each Hemisphere. ...
doi:10.1093/schbul/sbp151
pmid:20026559
pmcid:PMC3122277
fatcat:luwdm3ex3jem3jqvu7kvssi534
CORRELATION ANALYSIS OF TWO SKEWED DIPOLES USING EMBEDDED BEAM PATTERNS
2018
Progress In Electromagnetics Research C
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
In this paper, the correlation coefficients of skewed dipole arrays for antenna diversity are theoretically analyzed for each polarization characteristic and in various propagation environments. The correlation is not simply increased by two closely located antennas with different polarization characteristics, nor is it decreased by increasing the distance between the antennas. This is interpreted from the correlation analysis of two skewed dipoles with different polarization characteristics.
doi:10.2528/pierc18042604
fatcat:cszoopwvnnc7fjx3qgywevbqae
more »
... e embedded beam patterns of the two skewed dipoles are calculated using the mutual impedances derived using the effective length vector (ELV) method; then, the mutually coupled correlation coefficients for θ, φ, and total polarizations are effectively derived. The correlations are also analyzed for various realistic propagation environments using statistical channel models with angular density functions, and cross polarization discriminations (XPDs). Finally, this paper provides an effective correlation analysis for two dipoles and proposes an optimal geometry for two skewed dipoles in various propagation environments for each polarization characteristic with environmental variables.
« Previous
Showing results 1 — 15 out of 3,532 results