Wepresent the results of a survey of galaxies selected by their gas cross-section which give rise to Mg ii absorption lines in the spectra of background quasars. The sample comprises 11 galaxies covering the redshift range 0.7 < z < 1.2 with 〈z〉=0.9, and is combined with a lower redshift (z < 0.7) sample of 15 Mg ii absorbing galaxies. We first describe the properties of these two samples of ga...

We have detected an X-ray absorption feature against the core of the galaxy cluster Abell 2029 (z = 0.0767) which we identify with the foreground galaxy UZC J151054.6+054313 (z = 0.0221). Optical observations (B, V , R, and I) indicate that it is an Scd galaxy seen nearly edge-on at an inclination of 87±3. H i observations give a rotation velocity of 108 km s and an atomic hydrogen mass of MHI ...

Aims. We investigate the energy sources of the infrared (IR) emission and their relation to the radio continuum emission at various spatial scales within the Scd galaxy M33. Methods. We use the data at the Spitzer wavelengths of 24, 70, and 160μm, as well as recent radio continuum maps at 3.6 cm and 20 cm observed with the 100–m Effelsberg telescope and VLA, respectively. We use the wavelet tra...

We present VIJHK photometry for stars in a 0.8×2.0 kpc2 inner field of the dwarf irregular galaxy NGC 3109. The infrared photometry reaches 3 magnitudes fainter than previous work. Optical and infrared color–color and color–magnitude diagrams, and a bolometric luminosity function are constructed, confirming the presence of an intermediate-age stellar population. We also present a logL/L vs logT...

We summarize some recent results from our observational campaign to study the central regions of spiral galaxies of late Hubble type (Scd-Sm). These disk-dominated, bulgeless galaxies have an apparently uneventful merger history. The evolution of their nuclei thus holds important constraints on the mechanisms that are responsible for bulge formation and nuclear activity in spiral galaxies. We d...

Spleen damage is a common and crucial characteristic of SCD. A damaged spleen cannot effectively clear bacteria from the blood, leaving SCD patients, particularly young children, highly susceptible to infection. Children with SCD have rates of infection caused by bacterial pneumonia 30-100 times that of children without SCD, and pneumonia vaccines are of limited effectiveness in this age group ...

This article deals with the application of the principles of SCD (Selective Change Driven) vision to 3D laser scanning. Two experimental sets have been implemented: one with a classical CMOS (Complementary Metal-Oxide Semiconductor) sensor, and the other one with a recently developed CMOS SCD sensor for comparative purposes, both using the technique known as Active Triangulation. An SCD sensor ...

We are conducting a search for supermassive black holes (SMBHs) with masses below ∼107 M⊙ by looking for signs of extremely low-level nuclear activity in nearby galaxies that are not known to be AGNs. Our survey has the following characteristics: (a) X-ray selection using the Chandra X-ray Observatory, since x-rays are a ubiquitous feature of AGNs; (b) Emphasis on late-type spiral and dwarf gal...

Dynamic gene-regulatory networks are complex since the number of potential components involved in the system is very large. Estimating dynamic networks is an important task because they compromise valuable information about interactions among genes. Graphical models are a powerful class of models to estimate conditional independence among random variables, e.g. interactions in dynamic systems. ...