Low-Dimensional Fluctuations and Pseudogap in Gaudin-Yang Fermi Gases

Pseudogap is a ubiquitous phenomenon in strongly correlated systems such as high-$T_{\rm c}$ superconductors, ultracold atoms and nuclear physics. While pairing fluctuations inducing the pseudogap are known to be enhanced in low-dimensional systems, such effects have not been explored well in one of the most fundamental 1D models, that is, Gaudin-Yang model. In this work, we show that the pseudogap effect can be visible in the single-particle excitation in this system using a diagrammatic approach. Fermionic single-particle spectra exhibit a unique crossover from the double-particle dispersion to pseudogap state with increasing the attractive interaction and the number density at finite temperature. Surprisingly, our results of thermodynamic quantities in unpolarized and polarized gases show an excellent agreement with the recent quantum Monte Carlo and complex Langevin results, even in the region where the pseudogap appears.Comment: 6 pages, 5 figure

Quantum mechanical Liouville model with attractive potential

We study the quantum mechanical Liouville model with attractive potential which is obtained by Hamiltonian symmetry reduction from the system of a free particle on SL(2, \Real). The classical reduced system consists of a pair of Liouville subsystems which are `glued together' in such a way that the singularity of the Hamiltonian flow is regularized. It is shown that the quantum theory of this reduced system is labelled by an angle parameter $\theta \in [\,0,2\pi)$ characterizing the self-adjoint extensions of the Hamiltonian and hence the energy spectrum. There exists a probability flow between the two Liouville subsystems, demonstrating that the two subsystems are also `connected' quantum mechanically, even though all the wave functions in the Hilbert space vanish at the junction.Comment: 20 pages, plain tex, 2 Postscript figure

ESTIMATION OF THE EFFICIENCY OF JAPANESE HOSPITALS USING A DYNAMIC AND NETWORK DATA ENVELOPMENT ANALYSIS MODEL

Workshop 2013 on Dynamic and Network DEA (January 29-30, 2013)This study evaluates the policy effect of the reformation of municipal hospitals in Japan. We focused on the efficiency improvement of not only the hospital itself but also separate internal organizations of a hospital. Hospitals have two heterogeneous internal organizations: the medical-examination section and administration section. The administration section carries out business management and the medical-examination section provides medical care services. We employed a dynamic and network data envelopment analysis model. The model makes it possible to estimate both the efficiencies of separate organizations and the dynamic changes of the efficiencies simultaneously. We found that there are positive policy effects. Additionally, we should focus on the administration section rather than the medical-examination section in reforming municipal hospitals in Japan.This workshop is supported by JSPS KAKENHI Grant Number 22310092 under the title “Theory and Applications of Dynamic DEA with Network Structure.

ESTIMATION OF THE EFFICIENCY OF JAPANESE HOSPITALS USING A DYNAMIC AND NETWORK DATA ENVELOPMENT ANALYSIS MODEL

This workshop is supported by JSPS KAKENHI Grant Number 22310092 under the title “Theory and Applications of Dynamic DEA with Network Structure.”This study evaluates the policy effect of the reformation of municipal hospitals in Japan. We focused on the efficiency improvement of not only the hospital itself but also separate internal organizations of a hospital. Hospitals have two heterogeneous internal organizations: the medical-examination section and administration section. The administration section carries out business management and the medical-examination section provides medical care services. We employed a dynamic and network data envelopment analysis model. The model makes it possible to estimate both the efficiencies of separate organizations and the dynamic changes of the efficiencies simultaneously. We found that there are positive policy effects. Additionally, we should focus on the administration section rather than the medical-examination section in reforming municipal hospitals in Japan.Workshop 2013 on Dynamic and Network DEA (January 29-30, 2013)conference pape

How successful was the policy of reformation of municipal hospitals in Japan? : Estimation of the efficiency of Japanese hospitals using a dynamic and network data envelopment analysis

Workshop 2015 -Advances in DEA Theory and Applications (December 1-2, 2015)The purpose of this study was to perform an evaluation of the policy effect of the current reform of Japan’s municipal hospitals. We focused on efficiency improvements both within hospitals and within two separate internal hospital organizations. Hospitals have two heterogeneous internal organizations: the medical examination division and administration division. We extend observation time from 3years to 6years to compare to previous version of this study. We also added new variable MRI as link variable. Results showed that the average overall efficiency obtained with the DN-DEA model was 0.829 for 2007. The change in efficiency scores from 2007 to 2012 was slightly lower. The average estimated efficiency of both the administration division and medical-examination division decreased. We were unable to find any significant improvement in efficiency despite the reform policy. Thus, there are no positive policy effects despite the increased financial support from the central government.The workshop is supported by JSPS (Japan Society for the Promotion of Science), Grant-in-Aid for Scientific Research (B), #25282090, titled “Studies in Theory and Applications of DEA for Forecasting Purpose.本研究はJSPS科研費 基盤研究(B) 25282090の助成を受けたものです

Clinical characteristics and outcomes of heart failure with preserved ejection fraction: Lessons from epidemiological studies

SummaryRecent epidemiological studies have demonstrated that nearly half of all patients with heart failure (HF) have preserved left ventricular ejection fraction (HFPEF). Compared to those with reduced EF, patients with HFPEF are older, more likely to be women, less likely to have coronary artery disease, and more likely to have hypertension and atrial fibrillation. Patients with HFPEF receive different pharmacological as well as nonpharmacological treatments from those with reduced EF. Morbidity and mortality in patients with HFPEF are largely similar to those with reduced EF. Although much information has recently been obtained about the clinical characteristics, medications, and outcomes of HFPEF by large-scale clinical and epidemiological studies, effective management strategies need to be established for this type of HF

Morphological studies of Gross virus-induced lymphoblasts by scanning electron microscopy

The surface of Gross virus-induced murine lymphoblasts and C-type virus particles budding from these cells were investigated under the scanning electron microscope (SEM). The cells appeared spindle-shaped or roughly-rounded with extensive surface features consisting of microvilli, blebs and ruffled membranes. C-type virus particles were detected on the cell membrane as small spherical particles, distinguishable from the microvilli. Clustered virions were observed in some cases. However, the distribution of virions appeared to be random. The surface of the virion was smooth and had no globular units at high magnification. These morphological observations were confirmed in ultrathin sections.</p

LO-mode phonon of KCl and NaCl at 300 K by inelastic x-ray scattering measurements and first principles calculations

Longitudinal-optical (LO) mode phonon branches of KCl and NaCl were measured using inelastic x-ray scattering (IXS) at 300 K and calculated by the first-principles phonon calculation with the stochastic self-consistent harmonic approximation. Spectral shapes of the IXS measurements and calculated spectral functions agreed well. We analyzed the calculated spectral functions that provide higher resolutions of the spectra than the IXS measurements. Due to strong anharmonicity, the spectral functions of these phonon branches have several peaks and the LO modes along Gamma-L paths are disconnected