On Bogoliubov Transformation of Scalar Wave Functions in De Sitter Space

We discuss the Bogoliubov transformation of the scalar wave functions caused by the change of coordinates in 4 dimensional de Sitter space. It is shown that the exact Bogoliubov coefficients can be obtained from the global coordinates to the static coordinates where there exist manifest horizon. We consider two type of global coordinates. In one global coordinates, it is shown that the Bogoliubov transformation to the static coordinates can be expressed by the discontinuous integral of Weber and Schafheitlin. The positive and negative energy states in the global coordinates degenerate in the static coordinates. In the other global coordinates, we obtain the Bogoliubov coefficients by using the analytic continuation of the hypergeometric functions in two variables.Comment: 16 pages, OU-HET 202, LMU-TPW 94-1

Institutional Reform of Disability Policy (2009-14) in Japan: The Process and Outcome

The efforts of recent policy reform in Japan were analyzed and nine outcomes were extracted. The reform was carried out to harmonize existing laws with the Convention of the Rights of Persons with Disabilities before its ratification. The reform process was characterized by substantial participation of persons with disabilities and their family members.The products of the reform include: (1) establishment of Policy Monitoring System involving DPO participation, (2) enactment of advocacy legislations, (3) expansion of legal definition of persons with disabilities, (4) resolution of the issue of uncovered population in the national disability survey, (5) development of ideas in disability laws, (6) employment of “social model view” in policy, (7) ratification of Convention of the Rights of Persons with Disabilities, (8) five “compass” documents for disability policy, and (9) stronger tie among DPOs.However, serious gaps still exist between disability policy and legislations and the Convention, and further development is needed

New sounding modes for SuperDARN HF radars

We have developed several new sounding modes for SuperDARN HF radars to increase operation flexibility ("Nasu" mode, etc.) as well as to obtain both higher time resolution special camping beams data and global convection patterns simultaneously ("Basyouhu" mode). Utilizing the new "Basyouhu" mode, we were able to detect, for the first time, very rapidly moving transient phenomena (about 20 km/s) passing through the SuperDARN radar\u27s field of view without any ambiguity or uncertainty

Cusp-latitude conjugate ionospheric absorption associated with increase of solar wind dynamic pressure during strong northward IMF-a case study

Conjugate ionospheric absorption was observed in the magnetic pre-noon by the inter-hemispheric imaging riometers (IRISs) at Ny-Alesund (NAL), Svalbard and Zhongshan (ZHS), Antarctica in the cusp-latitude. The absorption was associated with increase of solar wind dynamic pressure during the strong northward interplanetary magnetic field. The conjugate absorption features showed a sequence of spike-shape with intensity of 400 km) exceeding the IRIS field-of-view with a poleward motion. The absorption spikes at NAL preceded the ones at ZHS by about 4 min. The absorption at NAL was located at part of enhanced auroral luminosity in the main oval from the POLAR UVI images, and also near the lower-latitude convection reversal in the plasma convection cell from the SuperDARN radar network of the northern hemisphere. Conjugate relationships, electrodynamics of electron precipitation and possible absorption mechanisms are discussed from these characteristics

A new method for monitoring and removing SuperDARN radar DC offsets

DC offsets in quadrature outputs (I/Q signals) pertinent to the SuperDARN HF radars can cause problems in determining and analysing auto-correlation functions, cross-correlation functions and raw time series data if they are not negligible. We have developed a new code to monitor and remove DC offsets. To obtain correct DC offset levels and noise levels, the offsets can be best removed using I/Q signals during the receive-only period, i.e., during each clear frequency search stage. We have implemented the new code in the current radar operating system, installed it at the SENSU Syowa radars, and have been obtaining and removing DC offset values continuously since October 2001