6,791 research outputs found
Stellar wind-magnetosphere interaction at exoplanets: computations of auroral radio powers
We present calculations of the auroral radio powers expected from exoplanets
with magnetospheres driven by an Earth-like magnetospheric interaction with the
solar wind. Specifically, we compute the twin cell-vortical ionospheric flows,
currents, and resulting radio powers resulting from a Dungey cycle process
driven by dayside and nightside magnetic reconnection, as a function of
planetary orbital distance and magnetic field strength. We include saturation
of the magnetospheric convection, as observed at the terrestrial magnetosphere,
and we present power law approximations for the convection potentials, radio
powers and spectral flux densities. We specifically consider a solar-age system
and a young (1 Gyr) system. We show that the radio power increases with
magnetic field strength for magnetospheres with saturated convection potential,
and broadly decreases with increasing orbital distance. We show that the
magnetospheric convection at hot Jupiters will be saturated, and thus unable to
dissipate the full available incident Poynting flux, such that the magnetic
Radiometric Bode's Law (RBL) presents a substantial overestimation of the radio
powers for hot Jupiters. Our radio powers for hot Jupiters are 5-1300 TW
for hot Jupiters with field strengths of 0.1-10 orbiting a Sun-like star,
while we find that competing effects yield essentially identical powers for hot
Jupiters orbiting a young Sun-like star. However, in particular for planets
with weaker magnetic fields our powers are higher at larger orbital distances
than given by the RBL, and there are many configurations of planet that are
expected to be detectable using SKA.Comment: Accepted for publication in Mon. Not. R. Astron. So
Security and confidentiality approach for the Clinical E-Science Framework (CLEF)
Objectives: CLEF is an MRC sponsored project in the E-Science programme that aims to establish methodologies and a technical infrastructure for the next generation of integrated clinical and bioscience research. Methods: The heart of the CLEF approach to this challenge is to design and develop a pseudonymised repository of histories of cancer patients that can be accessed by researchers. Robust mechanisms and policies have been developed to ensure that patient privacy and confidentiality are preserved while delivering a repository of such medically rich information for the purposes of scientific research. Results: This paper summarises the overall approach adopted by CLEF to meet data protection requirements, including the data flows, pseudonymisation measures and additional monitoring policies that are currently being developed. Conclusion: Once evaluated, it is hoped that the CLEF approach can serve as a model for other distributed electronic health record repositories to be accessed for research
Security and confidentiality approach for the Clinical E-Science Framework (CLEF)
CLEF is an MRC sponsored project in the E-Science programme that aims to
establish policies and infrastructure for the next generation of integrated clinical and
bioscience research. One of the major goals of the project is to provide a
pseudonymised repository of histories of cancer patients that can be accessed by
researchers. Robust mechanisms and policies are needed to ensure that patient
privacy and confidentiality are preserved while delivering a repository of such
medically rich information for the purposes of scientific research. This paper
summarises the overall approach adopted by CLEF to meet data protection
requirements, including the data flows and pseudonymisation mechanisms that are
currently being developed. Intended constraints and monitoring policies that will
apply to research interrogation of the repository are also outlined. Once evaluated, it
is hoped that the CLEF approach can serve as a model for other distributed
electronic health record repositories to be accessed for research
Diagnostic and therapeutic considerations in idiopathic hypereosinophilia with warm autoimmune hemolytic anemia.
Hypereosinophilic syndrome (HES) encompasses numerous diverse conditions resulting in peripheral hypereosinophilia that cannot be explained by hypersensitivity, infection, or atopy and that is not associated with known systemic diseases with specific organ involvement. HES is often attributed to neoplastic or reactive causes, such as chronic eosinophilic leukemia, although a majority of cases remains unexplained and are considered idiopathic. Here, we review the current diagnosis and management of HES and present a unique case of profound hypereosinophilia associated with warm autoimmune hemolytic anemia requiring intensive management. This case clearly illustrates the limitations of current knowledge with respect to hypereosinophilia syndrome as well as the challenges associated with its classification and management
Moving from Professionalism to Political Advocacy in the Human Services--How to Organize a Successful Statewide Political Effort in Youth Services
The current funding environment makes political advocacy on the part of social work professionals mandatory. The social work literature on political advocacy is reviewed and categorized into schools of thought. The major portion of the paper, however, presents and then analyzes a case study of a statewide youth services association in order to gain more insight into how professional social workers can develop and use more successful political strategies and tactics
TRANSMIGRATION AND REGIONAL DEVELOPMENT IN INDONESIA; POLICY OPTIONS BETWEEN MYTH AND REALITY
Pelaksanaan program transmigrasi di Indonesia terkesan sangat ambisius dengan berorientasi kepada masalah demografl. Tiap Pelita ditargetkan pengiriman sejumlah transmigran ke luar Jawa dan Bali sering tidak realistik dan menimbulkan permasalahan yang besar. Untuk mengatasi masalah ini disarankan hal-hal sebagai berikut. Jumlah transmigran yang dikirim tidak didasarkan kepada target kesesuaian daya tampung di daerah tujuan. Pemindahan penduduk diprioritaskan bagi daerah kritis, bencana alam, atau wilayah yang terkena proyek pembangunan. Penduduk lokal dengan keragaman sosial budaya perlu diikutkan dalam program ini. Usahakan peningkatan pengiriman transmigran spontan
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