We present Gemini GMOS longslit spectroscopy of the isolated S0 galaxy NGC 3115. We have determined kinematical data and Lick/IDS absorption line-strength indices for the major axis out to around 9 kpc and for the minor axis out to around 5 kpc (around 2Re). Using stellar population models which include the effects of variable [α/Fe] ratios we derive metallicities, abundance ratios and ages for...

The research field of digital libraries must be viewed as a union of subfields from a variety of domains combined with new research issues in order to realize its full potential. A clear exposition of the research issues involved has not yet been given. Most approaches to building digital library systems have thus far been limited to addressing specific digital library problems as variations of...

In an attempt to uncover intra-group behavior similarities, we developed an open multi-level framework for understanding the process of technology acceptance by its users. We partitioned our population into groups by clustering at several levels and then for each level it was divided into subgroups with a measurement layer added to uncover subgroup influence. Thus, by intersecting the resulting...

Agroecological research has improved our understanding of the drivers and benefits of biodiversity, thus providing the scientific basis needed to achieve agricultural multifunctionality. We review how agroecology has contributed to our understanding of the effects of local and landscape level drivers on beneficial insects, as well as on the ecosystem services they provide. Several syntheses fro...

Using the surface brightness fluctuations in HST WFPC-2 images, we determine that M87, NGC 4486B, and NGC 4478 are all at a distance of ∼ 16 Mpc, while NGC 4476 lies in the background at ∼ 21 Mpc. We also examine the globular clusters of M87 using archived HST fields. We detect the bimodal color distribution, and find that the amplitude of the red peak relative to the blue peak is greatest near...

The infrared spectra of starburst galaxies are dominated by the low-excitation lines of [NeII] and [SIII], and the stellar populations deduced from these spectra appear to lack stars larger than about 35 M⊙. The only exceptions to this result until now were low metallicity dwarf galaxies. We report our analysis of the midinfrared spectra obtained with IRS on Spitzer of the starburst galaxy NGC ...

We summarize the observed properties of the CHVC population, which provide strong evidence for source distances in the range 200– 1000 kpc. At these distances, the population corresponds to strongly dark-matter dominated sub-dwarf galaxies still accreting onto the more massive Local Group systems. Recent searches for faint associated stellar populations have revealed red-giant candidates for wh...

We use deep images taken with the Advanced Camera for Surveys on board the Hubble Space Telescope of the disk galaxy NGC 891, to search for globular cluster candidates. This galaxy has long been considered to be a close analog in size and structure to the Milky Way and is nearly edge-on, facilitating studies of its halo population. These extraplanar ACS images, originally intended to study the ...

The past decade has seen an upsurge of interest in the development of summary measures of population health. Almost invariably the measures have relied on ‘‘rolling up’’ individual level health data such as mortality data or life expectancy data. The approach, however, of treating population health as a synthesis of aggregated individual level data is a historical and statistical convenience. A...

The Divisions Diabetes and Cardiovascular Disease Quality Improvement Project (DDCQIP) is a national project that aims to promote quality improvement initiatives among Divisions of General Practice. DDCQIP has investigated the growth of Division-based diabetes and cardiovascular disease register-recall systems and the role they play in promoting evidence-based structured care within general pra...