We re-analyze the HST high resolution spectroscopic data of the intrinsic absorber in NGC 5548 and find that the C iv absorption column density is at least four times larger than previously determined. This increase arises from accounting for the kinematical nature of the absorber and from our conclusion that the outflow does not cover the narrow emission line region in this object. The improve...

Every company strives to come-up with innovative products that satisfy customer requests efficiently and effectively. The principles and working methods of Lean thinking have been suggested in literature for companies to optimize stakeholders’ interests throughout their product development (PD) process. However, the application of the Lean PD remains unclear from practitioner’s perspective. As ...

The mechanical and electrical properties of graphite and related materials such as multilayer graphene depend strongly on the presence of defects in the lattice structure, particularly those which create links between adjacent planes. We present findings which suggest the existence of a new type of defect in the graphite or graphene structure which connects adjacent planes through continuous he...

New high resolution, high sensitivity WSRT H i synthesis observations of the spiral galaxy NGC 3631 are presented. In the total atomic hydrogen map, the spiral arms are well distinguished from the interarm regions, while the sensitivity allows detection of H i in all but a few isolated regions of the areas between the spiral arms. Most of the atomic hydrogen is located within the optical disc, ...

Two types of networks are considered with special interest for e-learning environments: social and collaborative networks. There is no consensus about the frontiers dividing the two types, though a set of common interrelated characteristics is found during any learning experience, such as social identity, interaction and empowerment. These and other characteristics may greatly influence the e-l...

As part of several H I synthesis-mapping studies of merging galaxies, we have mapped the tidal gas in the three disk-disk merger systems Arp 157 (NGC 520), Arp 220, and Arp 299 (NGC 3690). These systems di†er from the majority of the mergers mapped in H I in that their stellar and gaseous tidal features do not coincide. In particular, they exhibit large stellar tidal features with little if any...

In the following supplemental material we provide some additional details and derivations for the paper. We begin by showing how to calculate the joint distribution of p(β, z), marginalizing out π, in Section 1. Then, in Section 2 we consider looking at joint log-likelihoods of HDP topic models and show that the typical set of the distribution is very far from the mode. In Sections 3-4, we give...

— A new type of high-impedance surfaces (HIS) has been introduced by C.R. Simovski et al. recently. In this paper, we propose to use such layers as artificial magnetic materials in the design of patch antennas. The new HIS is simulated and patch antennas partially filled by these composite layers are measured in order to test how much the antenna dimensions can be reduced. In order to experimen...

We demonstrate the feasibility of uncovering supermassive black holes in late-type, “quiescent” spiral galaxies by detecting signs of very low-level nuclear activity. We use a combination of x-ray selection and multi-wavelength follow-up. Here, we apply this technique to NGC 3184 and NGC 5457, both of type Scd, and show that strong arguments can be made that both host AGNs.