HI tomographic imaging of the Cosmic Dawn and Epoch of Reionization with SKA

We provide an overview of 21cm tomography of the Cosmic Dawn and Epoch of Reionization as possible with SKA-Low. We show why tomography is essential for studying CD/EoR and present the scales which can be imaged at different frequencies for the different phases of SKA- Low. Next we discuss the different ways in which tomographic data can be analyzed. We end with an overview of science questions which can only be answered by tomography, ranging from the characterization of individual objects to understanding the global processes shaping the Universe during the CD/EoRComment: 14 pages, 3 figures. Accepted for publication in the SKA Science Book 'Advancing Astrophysics with the Square Kilometre Array', to appear in 2015. PoS(AASKA14)01

The prevalence and characteristics of patients with classic locked-in syndrome in Dutch nursing homes

Item does not contain fulltextTo establish the point prevalence and characteristics of patients with locked-in syndrome (LIS), particularly of the classic type, residing in Dutch nursing homes, a cross-sectional survey of Dutch nursing homes was conducted. The classic form of LIS was defined according to the criteria of the American Congress of Rehabilitation Medicine (1995). All Dutch long-term care organisations (n = 187) were asked if they had any patients with classic LIS as of December 5, 2011. The treating Elderly Care Physicians were then contacted to provide patient characteristics. Of all organisations, 91.4 % responded, and 11 organisations reported a total of 12 patients. After analysing the questionnaires, it was determined that ten patients had LIS, and two patients were characterised with vegetative state. Only two patients met the criteria for classic LIS, while six patients showed partial LIS. One of these patients was admitted to the nursing home after December 5, 2011, and was therefore, excluded. LIS without accompanying pontine lesion was observed in the remaining two patients. For the first time, the prevalence of classic LIS has been established at 0.7/10,000 somatic nursing home beds in all Dutch long-term care organisations. Possible explanations for this low prevalence could be the Dutch provision of home care or the influence of end-of-life decisions, such as euthanasia and withholding or withdrawing all medical treatment, including artificial nutrition and hydration. These alternate outcomes should be explored in further studies

Reionization and the Cosmic Dawn with the Square Kilometre Array

The Square Kilometre Array (SKA) will have a low frequency component (SKA-low) which has as one of its main science goals the study of the redshifted 21cm line from the earliest phases of star and galaxy formation in the Universe. This 21cm signal provides a new and unique window both on the time of the formation of the first stars and accreting black holes and the subsequent period of substantial ionization of the intergalactic medium. The signal will teach us fundamental new things about the earliest phases of structure formation, cosmology and even has the potential to lead to the discovery of new physical phenomena. Here we present a white paper with an overview of the science questions that SKA-low can address, how we plan to tackle these questions and what this implies for the basic design of the telescop