BibSonomy publications for /author/BradleyWed Feb 15 06:28:48 CET 2012cite arxiv:1202.3135Comment: accepted for publication in ApJ, 29 pages, 20 figuresAnalysing star cluster populations with stochastic models: the HST/WFC3 sample of clusters in M832012stochastic models clusters The majority of clusters in the Universe have masses well below 10^5 Msun. Hence their integrated fluxes and colors can be affected by the random presence of a few bright stars introduced by stochastic sampling of the stellar mass function. Specific methods are being developed to extend the analysis of cluster SEDs into the low-mass regime. In this paper, we apply such a method to observations of star clusters, in the nearby spiral galaxy M83. We reassess ages and masses of a sample of 1242 objects for which UBVIHalpha fluxes were obtained with the HST/WFC3 images. Synthetic clusters with known properties are used to characterize the limitations of the method. The ensemble of color predictions of the discrete cluster models are in good agreement with the distribution of observed colors. We emphasize the important role of the Halpha data in the assessment of the fraction of young objects, particularly in breaking the age-extinction degeneracy that hampers an analysis based on UBVI only. We find the mass distribution of the cluster sample to follow a power-law of index -2.1 +/-0.2, and the distribution of ages a power-law of index -1.0 +/-0.2 for M > 10^3.5 Msun and ages between 10^7 and 10^9 yr. An extension of our main method, that makes full use of the probability distributions of age and mass of the individual clusters, is explored. It produces similar power-law slopes and will deserve further investigation. Although the properties derived for individual clusters significantly differ from those obtained with traditional, non-stochastic models in ~30% of the objects, the first order aspect of the age and mass distributions are similar to those obtained previously for this M83 sample in the range of overlap of the studies. We extend the power-law description to lower masses with better mass and age resolution and without most of the artifacts produced by the classical method. Tue Feb 14 00:00:00 CET 2012AAAI Spring Symposium: Help Me Help You: Bridging the Gaps in Human-Agent Collaborationconf/aaaiss/2011-5Reinforcement Learning with Human Feedback in Mountain Car.2011dblp Mon Feb 13 00:00:00 CET 2012IEEE Transactions on Information Technology in Biomedicine1166-175Secure Management of Biomedical Data With Cryptographic Hardware.162012dblp Thu Feb 09 00:00:00 CET 2012iConferenceconf/iconference/2012429-430Mapping location-based questions to inform mobile campus apps.2012dblp Thu Feb 09 00:00:00 CET 2012ISSAconf/issa/2009479-488Management, Processing and Analysis of Cryptographic Network Protocols.2009dblp Tue Feb 07 00:00:00 CET 2012IEEE Trans. Systems Science and Cybernetics2116-121Studies in Postural Control Systems Part I: Torque Disturbance Input.61970dblp Tue Feb 07 00:00:00 CET 2012IEEE Trans. Systems Science and Cybernetics3223-230The Systems Approach to Test Evaluation.51969dblp Tue Feb 07 00:00:00 CET 2012IEEE Trans. Systems Science and Cybernetics2122-126Studies in Postural Control Systems Part II: Tendon Jerk Input.61970dblp Tue Feb 07 00:00:00 CET 2012IPASconf/ifip5-5/2012ipas28-35IFIP PublicationsParallel Packaging of Micro Electro Mechanical Systems (MEMS) Using Self-alignment.3712012dblp Tue Feb 07 00:00:00 CET 2012GfKlconf/gfkl/2010173-182Studies in Classification, Data Analysis, and Knowledge Organizationp-adic Methods in Stereo Vision.2010dblp Mon Feb 06 00:00:00 CET 2012IEEE Transactions on Signal Processing2560-574Nonuniform fast Fourier transforms using min-max interpolation.512003dblp Mon Feb 06 00:00:00 CET 2012Library Hi Tech4536-547Utilizing geographic information systems (GIS) in library research.282010dblp Sun Feb 05 00:00:00 CET 2012IEEE Transactions on Signal Processing4994-997Perfect reconstruction with critically sampled filter banks and linear boundary conditions.431995dblp Fri Feb 03 00:00:00 CET 2012I-XIII, 1-235Programming for Engineers - A Foundational Approach to Learning C and Matlab.2011dblp Tue Jan 31 00:00:00 CET 2012EPEWconf/epew/201187-101Lecture Notes in Computer ScienceHigher Moment Analysis of a Spatial Stochastic Process Algebra.69772011dblp Sun Jan 29 00:00:00 CET 2012IEEE Transactions on Signal Processing82243-2248An efficient method of FIR filtering based on impulse response rounding.461998dblp Sat Jan 28 00:00:00 CET 2012ICSEconf/icse/2011643-652SORASCS: a case study in soa-based platform design for socio-cultural analysis.2011dblp Fri Jan 27 14:10:42 CET 2012Journal of Sound and Vibration589-604The effects of site selected variables on human responses to traffic noise, part I: Type of housing by traffic noise level661979imported The results of the first part of a field study of human response to traffice noise are reported, along with the general methodology of the entire study. The research was carried out by carefully selecting subjects at sites that had the desired values of selected site variables. Human response measurements were obtained from interviewer administered structured questionnaires, and were as spatially and temporally coincident as possible with the noise measurements. Noise measurements were obtained from six days of rapidly sampled recordings. In this first part the effects of traffic noise level and housing type were considered. Although traffic noise level was the major correlate of the intensity of negative responses to traffic noise, traffic noise level by housing type interaction effects were also observed and were attributed to the accuracy of perceiving the vehicle flow rate and day-night noise level differences. Spontaneous responses supported the validity of the elicited responses.Fri Jan 27 14:10:42 CET 2012Journal of Sound and Vibration395-407The effects of site selected variables on human responses to traffic noise, Part II: Road type by socio-economic status by traffic noise level671979imported The results of the second part of a field study of human response to traffic noise are reported. The influence of traffic noise level, socio-economic status, and road type (freeway or conventional road) were investigated in a controlled manner determined by subject selection procedures. Human response measures were obtained from interviewer administered questionnaires, and were as spatially and temporally coincident with the noise measurements as possible. Noise measurements were obtained from six days of rapidly sampled digital recordings. Although traffic noise level was the major predictor of the intensity of negative responses, other site variables produced significant effects. Parallel variations in the day-night difference in sound levels appeared to contribute to these effects. Spontaneous responses supported the validity of the elicited responses. Freeway noise was found to produce a more continuously disturbing noise environment and was concluded to be a more pervasive form of disturbing environmental noise.Fri Jan 27 14:10:42 CET 2012Journal of Sound and Vibration409-423The effects of site selected variables on human responses to traffic noise, part III: Community size by socio-economic status by traffic noise level671979imported This paper reports the results of the third part of a field study of human responses to traffic noise. The influence of traffic noise level, community size, and socio-economic status were investigated in a controlled manner determined by subject selection procedures. Human responses were obtained from interviewer administered questionnaires, and were as spatially and temporally coincident with the noise measurements as possible. Noise measurements were obtained from several days of rapidly sampled digital recordings. Traffic noise level was the major predictor of the intensity of elicited responses. A number of other significant effects were observed largely related to community size. These were explained as due to parallel variations in the perceived necessity of vehicles, the annoyance with aircraft noise, and the logarithm of the vehicle flow rate. The results did demonstrate effects related to community size, and thus it is unwise to extrapolate the results of large city noise studies to small communities and rural areas.