953 research outputs found
Approximative filtering of XML documents in a publish/subscribe system
Publish/subscribe systems filter published documents and inform their subscribers about documents matching their interests. Recent systems have focussed on documents or messages sent in XML format. Subscribers have to be familiar with the underlying XML format to create meaningful subscriptions. A service might support several providers with slightly differing formats, e.g., several publishers of books. This makes the definition of a successful subscription almost impossible. This paper proposes the use of an approximative language for subscriptions. We introduce the design of our ApproXFilter algorithm for approximative filtering in a publish/subscribe system. We present the results of our performance analysis of a prototypical implementation
Inclusive Employment Opportunities for Adults with Down Syndrome
Adults with Down syndrome (DS) face several barriers to inclusive and community-based employment opportunities, including the DS phenotype, volition, and disability stigma. The purpose of this project was to create a strengths-based occupational therapy (OT) group program to address these barriers. Using information from the needs assessment as well as the Ecology of Human Performance model, the Model of Human Occupation, and the Social Model of Disability, the EmployAble program was created. EmployAble took place twice a week for five weeks and included six adults with DS, ages 19-32. The group focused on employment readiness skills such as interpersonal skills, professional communication, and self-advocacy through various client-centered activities.
The outcome measures and evaluations demonstrated the effectiveness of the program. 66% of the group improved in the following domains: appropriate greetings, asking for help when needed, offering help if needed, taking responsibility for mistakes. Parents of group members reported unanimous satisfaction with the program. The EmployAble program, as well as relevant information about inclusive employment, was disseminated across a variety of platforms. It is recommended that OT practitioners continue to facilitate inclusive employment opportunities for adults with DS.https://soar.usa.edu/otdcapstones-spring2022/1035/thumbnail.jp
Cool Young Stars in the Northern Hemisphere: Beta Pictoris and AB Doradus Moving Group Candidates
As part of our continuing effort to identify new, low-mass members of nearby,
young moving groups (NYMGs), we present a list of young, low-mass candidates in
the northern hemisphere. We used our proven proper motion selection procedure
and ROSAT-X-ray and GALEX-UV activity indicators to identify 204 young stars as
candidate members of the Beta Pictoris and AB Doradus NYMGs. Definitive
membership assignment of a given candidate will require a measurement of its
radial velocity and distance. We present a simple system of indices to
characterize the young candidates and help prioritize follow up observations.
New group members identified in this candidate list will be high priority
targets for: 1) exoplanet direct imaging searches, 2) the study of post-T-Tauri
astrophysics, 3) understanding recent local star formation, and 4) the study of
local galactic kinematics. Information available now allows us to identify 8
likely new members in the list. Two of these, a late-K and an early-M dwarf, we
find to be likely members of the Beta Pic group. The other six stars are likely
members of the AB Dor moving group. These include an M dwarf triple system, and
three very cool objects that may be young brown dwarfs, making them the
lowest-mass, isolated objects proposed in the AB Dor moving group to date.Comment: 41 pages, 15 figures, Accepted to the Astronomical Journa
Subaru/SCExAO First-light Direct Imaging of a Young Debris Disk around HD 36546
We present H-band scattered light imaging of a bright debris disk around the A0 star HD 36546 obtained from the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system with data recorded by the HiCIAO camera using the vector vortex coronagraph. SCExAO traces the disk from r ~ 0.â3 to r ~ 1'' (34â114 au). The disk is oriented in a near eastâwest direction (PA ~ 75°), is inclined by i ~ 70°â75°, and is strongly forward-scattering (g > 0.5). It is an extended disk rather than a sharp ring; a second, diffuse dust population extends from the disk's eastern side. While HD 36546 intrinsic properties are consistent with a wide age range (t ~ 1â250 Myr), its kinematics and analysis of coeval stars suggest a young age (3â10 Myr) and a possible connection to Taurus-Auriga's star formation history. SCExAO's planet-to-star contrast ratios are comparable to the first-light Gemini Planet Imager contrasts; for an age of 10 Myr, we rule out planets with masses comparable to HR 8799 b beyond a projected separation of 23 au. A massive icy planetesimal disk or an unseen super-Jovian planet at r > 20 au may explain the disk's visibility. The HD 36546 debris disk may be the youngest debris disk yet imaged, is the first newly identified object from the now-operational SCExAO extreme AO system, is ideally suited for spectroscopic follow-up with SCExAO/CHARIS in 2017, and may be a key probe of icy planet formation and planetâdisk interactions
The VLT/NaCo large program to probe the occurrence of exoplanets and brown dwarfs at wide orbits. IV. Gravitational instability rarely forms wide, giant planets
Understanding the formation and evolution of giant planets (â„1 M_(Jup)) at wide orbital separation (â„5 AU) is one of the goals of direct imaging. Over the past 15 yr, many surveys have placed strong constraints on the occurrence rate of wide-orbit giants, mostly based on non-detections, but very few have tried to make a direct link with planet formation theories. In the present work, we combine the results of our previously published VLT/NaCo large program with the results of 12 past imaging surveys to constitute a statistical sample of 199 FGK stars within 100 pc, including three stars with sub-stellar companions. Using Monte Carlo simulations and assuming linear flat distributions for the mass and semi-major axis of planets, we estimate the sub-stellar companion frequency to be within 0.75â5.70% at the 68% confidence level (CL) within 20â300 AU and 0.5â75 M_(Jup), which is compatible with previously published results. We also compare our results with the predictions of state-of-the-art population synthesis models based on the gravitational instability (GI) formation scenario with and without scattering. We estimate that in both the scattered and non-scattered populations, we would be able to detect more than 30% of companions in the 1â75 M_(Jup) range (95% CL). With the threesub-stellar detections in our sample, we estimate the fraction of stars that host a planetary system formed by GI to be within 1.0â8.6% (95% CL). We also conclude that even though GI is not common, it predicts a mass distribution of wide-orbit massive companions that is much closer to what is observed than what the core accretion scenario predicts. Finally, we associate the present paper with the release of the Direct Imaging Virtual Archive (DIVA), a public database that aims at gathering the results of past, present, and future direct imaging surveys
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