Dark energy cosmology from higher-order, string-inspired gravity and its reconstruction

In this paper we investigate the cosmological effects of modified gravity with string curvature corrections added to Einstein-Hilbert action in the presence of a dynamically evolving scalar field coupled to Riemann invariants. The scenario exhibits several features of cosmological interest for late universe. It is shown that higher order stringy corrections can lead to a class of dark energy models consistent with recent observations. The model can give rise to quintessence, deSitter or phantom dark energy, in last case without recourse to negative kinetic energy field. The detailed treatment of reconstruction program for general scalar-Gauss-Bonnet gravity is presented for any given cosmology. The explicit examples of reconstructed scalar potentials are given for accelerated (quintessence, cosmological constant or phantom) universe. Finally, the relation with modified $F(G)$ gravity is established on classical level and is extended to include third order terms on curvature.Comment: 15 pages, 3 figures, minor changes, published versio

<Original Article> Optimization of Dose Distribution in Intracavitary Treatment of Cervical Cancer with Buchler's Afterloading System

We evaluated dose optimization for the treatment of cervical cancer using Buchler's high-dose-rate (HDR) remote-control-afterloading-system (RALS). When Buchler's system is used for intracavitary treatment, the irradiation times for the tandem and ovoid sources should be selected separately. The effects of variation of the tandem-to-ovoid dose ratio on the dose distribution are described.journal articl

Dark energy cosmology from higher-order, string-inspired gravity, and its reconstruction

In this paper we investigate the cosmological effects of modified gravity with string curvature corrections added to the Einstein-Hilbert action in the presence of a dynamically evolving scalar field coupled to Riemann invariants. The scenario exhibits several features of cosmological interest for the late universe. We show that higher-order stringy corrections can lead to a class of dark energy models consistent with recent observations. The models can give rise to quintessence without recourse to a scalar field potential. The detailed treatment of the reconstruction program for general scalar-Gauss-Bonnet gravity is presented for any given cosmology. The explicit examples of reconstructed scalar potentials are given for an accelerated (quintessence, cosmological constant, or phantom) universe. Finally, the relation with modified F(G) gravity is established at the classical level and is extended to include third order terms on the curvature.journal articl

Epistle IV To Richard Boyle, Earl ofBurlingtonにおける諷刺と称讃

application/pdf言語と文化. 2011, 10, p.71-81departmental bulletin pape

Distortion of Decision Making for the Construction of the New National Stadium Are Sports a Political Tool?

text紀要論文 / Departmental Bulletin Paperdepartmental bulletin pape

Improved measurements of the partial rate asymmetry in B→hh decays

journal articl

Key nodes (metabolites) in the differential correlation network.

DC: degree centrality; BC: betweenness centrality; CC: closeness centrality. Key nodes: either with high degrees, or high betweenness/closeness, or both.</p

Characteristics of the study participants in the pre- and post-menopause.

Characteristics of the study participants in the pre- and post-menopause.</p

The differential correlation network showing linkages between components of the metabolite dataset.

(Only pairs that have significant differential correlations are shown. The network is visualized using the force-directed layout presentation with a closer node layout distance representing a stronger pairwise correlation. Edge width is proportional to differential correlation strength and edge color shows positive (red) and negative (blue) differential correlations).</p

Metabolites as hubs (high degree) and bottlenecks (high betweenness or closeness) in the network.

Metabolites as hubs (high degree) and bottlenecks (high betweenness or closeness) in the network.</p