Imaging ionospheric inhomogeneities using spaceborne synthetic aperture radar

We present a technique and results of 2-D imaging of Faraday rotation and total electron content using spaceborne L band polarimetric synthetic aperture radar (PolSAR). The results are obtained by processing PolSAR data collected using the Phased Array type L-band Synthetic Aperture Radar (PALSAR) on board the Advanced Land Observation Satellite. Distinguished ionospheric inhomogeneities are captured in 2-D images from space with relatively high resolutions of hundreds of meters to a couple of kilometers in auroral-, middle-, and low-latitude regions. The observed phenomena include aurora-associated ionospheric enhancement arcs, the middle-latitude trough, traveling ionospheric disturbances, and plasma bubbles, as well as ionospheric irregularities. These demonstrate a new capability of spaceborne synthetic aperture radar that will not only provide measurements to correction of ionospheric effects in Earth science imagery but also significantly benefit ionospheric studies

Places of the Heart: Memorials, Public History and the State in Australia Since 1960

Memorials as a form of public history allow us to chart the complex interactions and negotiations between officially endorsed historical narratives, public memorials, privately sponsored memorials in public spaces and new histories. As Ludmilla Jordanova reminds us, âthe state⦠lies at the heart of public historyâ. And this is evident in the public process of memorialisation. At one level, the state endorses certain narratives within which communities and organisations need to operate if they are to be officially part of the national story and its regional and local variants. Ultimate endorsement for memorials includes listings on heritage registers. Controls over the erection of memorials vary from official policies to process for the issue of permits for their construction in public places or their removal. The state, however, is not monolithic. Permissible pasts evolve over time given shifts in power and social and cultural change. This involves both âretrospective commemorationâ and âparticipatory memorialisationâ. The presence and power of the past in peoplesâ lives, too, means in practice that memorial landscapes will reflect, in truly democratic societies, the values, experiences and dominant concerns of its citizens

'Unfinished Business': Public History in a Postcolonial Nation

An examination of Public History in Australia from the nineteenth century in terms of memory, race and nationalism drawing on museums, memorials, rituals, celebrations and the 'history wars'

Mean field and pairing properties in the crust of neutron stars

Properties of the matter in the inner crust of a neutron star are investigated in a Hartree-Fock plus BCS approximation employing schematic effective forces of the type of the Skyrme forces. Special attention is paid to differences between a homogenous and inhomogeneous description of the matter distribution. For that purpose self-consistent Hartree Fock calculations are performed in a spherical Wigner-Seitz cell. The results are compared to predictions of corresponding Thomas Fermi calculations. The influence of the shell structure on the formation of pairing correlations in inhomogeneous matter are discussed.Comment: 11 pages, 9 figure

Drifting diffusion on a circle as continuous limit of a multiurn Ehrenfest model

We study the continuous limit of a multibox Erhenfest urn model proposed before by the authors. The evolution of the resulting continuous system is governed by a differential equation, which describes a diffusion process on a circle with a nonzero drifting velocity. The short time behavior of this diffusion process is obtained directly by solving the equation, while the long time behavior is derived using the Poisson summation formula. They reproduce the previous results in the large $M$ (number of boxes) limit. We also discuss the connection between this diffusion equation and the Schr$\ddot{\rm o}$dinger equation of some quantum mechanical problems.Comment: 4 pages prevtex4 file, 1 eps figur

Human Resource Development for Health in Indonesia: Challenges of Achieving the Millennium Development Goals

The development of Human Resources for Health (HRH) is one of the keys to achieving The Millennium Development Goals (MDG). Providing and ensuring the best health care service in every region of Indonesia has long been a major concern. Several challenges faced by HRH development are a shortage of professionals, uneven distribution of professionals between regions, a variety of settings (urban and rural), and management of the health workforce under a decentralization system

Attosecond dispersive soft X-ray absorption fine structure spectroscopy in graphite

Phase transitions of solids and structural transformations of molecules are canonical examples of important photo-induced processes, whose underlying mechanisms largely elude our comprehension due to our inability to correlate electronic excitation with atomic position in real time. Here, we present a decisive step towards such new methodology based on water-window-covering (284 eV to 543 eV) attosecond soft X-ray pulses that can simultaneously access electronic and lattice parameters via dispersive X-ray absorption fine-structure (XAFS) spectroscopy. We validate attoXAFS with an identification of the {\sigma}* and {\pi}* orbital contributions to the density of states in graphite simultaneously with its lattice's four characteristic bonding distances. This work demonstrates the concept of attoXAFS as a powerful real-time investigative tool which is equally applicable to gas-, liquid- and condensed phase