The Japanese space gravitational wave antenna; DECIGO

DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. DECIGO is expected to open a new window of observation for gravitational wave astronomy especially between 0.1 Hz and 10 Hz, revealing various mysteries of the universe such as dark energy, formation mechanism of supermassive black holes, and inflation of the universe. The pre-conceptual design of DECIGO consists of three drag-free spacecraft, whose relative displacements are measured by a differential Fabry– Perot Michelson interferometer. We plan to launch two missions, DECIGO pathfinder and pre- DECIGO first and finally DECIGO in 2024

DECIGO pathfinder

DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) which is a future space gravitational wave antenna. DECIGO is expected to provide us fruitful insights into the universe, in particular about dark energy, a formation mechanism of supermassive black holes, and the inflation of the universe. Since DECIGO will be an extremely large mission which will formed by three drag-free spacecraft with 1000m separation, it is significant to gain the technical feasibility of DECIGO before its planned launch in 2024. Thus, we are planning to launch two milestone missions: DPF and pre-DECIGO. The conceptual design and current status of the first milestone mission, DPF, are reviewed in this article

The status of DECIGO

DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) is the planned Japanese space gravitational wave antenna, aiming to detect gravitational waves from astrophysically and cosmologically significant sources mainly between 0.1 Hz and 10 Hz and thus to open a new window for gravitational wave astronomy and for the universe. DECIGO will consists of three drag-free spacecraft arranged in an equilateral triangle with 1000 km arm lengths whose relative displacements are measured by a differential Fabry-Perot interferometer, and four units of triangular Fabry-Perot interferometers are arranged on heliocentric orbit around the sun. DECIGO is vary ambitious mission, we plan to launch DECIGO in era of 2030s after precursor satellite mission, B-DECIGO. B-DECIGO is essentially smaller version of DECIGO: B-DECIGO consists of three spacecraft arranged in an triangle with 100 km arm lengths orbiting 2000 km above the surface of the earth. It is hoped that the launch date will be late 2020s for the present

Related Psycho physiological Factors Determining Amount of Changes in Positive Mood State Following Comfortable Self-Paced Running

This investigation examined the psychophysiological factors related to amounts of positive mood changes following aerobic exercise. Comfortable Self-Paced Running (CSPR) can be defined as running at a subjective exercise intensity of Comfortable Self-Established Pace (CSEP). Eighteen male students performed CSPR for 15 min on a treadmill. Subjects completed the Mood Check List (MCL-S.1), consisting of \u22Pleasantness,\u22 \u22Relaxation\u22 and \u22Anxiety\u22 subscales, both before and immediately after CSPR. Mean Ratings of Perceived Exertion (RPE), heart rate, and %V02max during CSPR indicated that the exercise intensity of CSPR was at a moderate level. In addition, a significant increase in \u22Pleasantness\u22 and \u22Relaxation,\u22 and a significant decrease in \u22Anxiety\u22 were found immediately after exercise. There was a significant correlation between amount of increase in both \u22Pleasantness\u22 and \u22Relaxation\u22 and a more emotionally unstable or socially inadaptable personality, lower levels of mental health, higher trait anxiety, type A behavior pattern, and more positive belief towards sport behavior. Furthermore, greater increases in \u22Relaxation\u22 were associated with lower %V02max. The results of multiple regression analyses indicated that trait anxiety and a type A behavior pattern were both significant positive predictors (74.7%) for the amount of change in \u22Pleasantness.\u22 Only trait anxiety, however, was a positive predictor (61.6%) for \u22Relaxation.\u22 These results suggest that the increase in positive mood following CSPR can be attributed more to psychological than physiological factors. In particular, high trait anxiety appears to be a strong predictor for changes in positive mood following CSPR

Substituent effect on the dual fluorescence of benzanilides and N-methylbenzanilides in cyclohexane. Direct evidence for intramolecular charge transfer.

A series of benzoyl para- and meta-substituted benzanilides (BAs) and N-methylbenzanilides (MBAs) were synthesized and their absorption and fluorescence spectra in nonpolar solvent cyclohexane were investigated. Quantum mechanical calculations indicated that the ground state BAs existed preferentially in the trans configuration, whereas MBAs existed in the cis configuration, and benzoyl substitution hardly changed the ground-state structure in the same series. It was observed that all of the synthesized compounds displayed dual fluorescence in cyclohexane, i.e., a normal emission at ca. 330 nm and an abnormal long-wavelength fluorescence at around 500 nm. Although the normal emission of both BAs and MBAs did not show obvious variation, the long-wavelength emission shifted strongly to the red with increasing electron-withdrawing ability of the substituent at the benzoyl moiety. The emission energies of the long-wavelength fluorescence of BAs and MBAs in cyclohexane were found to vary linearly with the Hammett substituent coefficient sigma with almost the same slopes of -0.34 eV for both lines. In diethyl ether, similar linear correlation was also found for BAs with a slope of -0.36 eV that is close to that in cyclohexane. It was concluded that the long-wavelength emission of both BAs and MBAs in cyclohexane originated from a single intramolecular charge transfer state of similar configuration for both BAs and MBAs and of high extent of charge separation. The latter was supported by a linear slope of -0.67 for the correlation of long-wavelength emission energies of BAs against their reduction potentials. It was suggested that the reaction constant rho might reflect the extent of charge separation of the CT reaction and the rho value for a full charge separation was calculated to be -8.5 and +8.5 for a substituent at the electron donor and acceptor moiety, respectively