We present new observations of the gravitational lens (GL) system B1600+434, strongly suggesting that the lens is an edge-on spiral galaxy. These observations are used to constrain the mass model of the system, in particular the oblateness and velocity dispersion of the dark matter halo around the lensing galaxy. From an analytical model we find a lower limit on the halo oblate-ness q halo = (c...

Accurate phase-space coordinates (three components of position and velocity) of individual stars are rapidly becoming available with current and future resolved star surveys. These data will enable the computation of the full three-dimensional orbits of tens of thousands of stars in the Milky Way’s stellar halo. We demonstrate that the analysis of stellar halo orbits in frequency space can be u...

In purchase situations where attribute information is either missing or difficult to judge, a well-known “rule of thumb” consumers use to form evaluations is the halo effect. The psychology literature has widely considered the halo to reflect consumers’ inability to discriminate between different attributes and have therefore labeled it as the “halo error” or the “logical error.” The objective ...

The magnetic field of a planet or a planetary moon contains contributions from a variety of sources in the environment of the body (external sources) and its interior (internal sources). This chapter describes different methods that have been developed for the separation of external and internal source contributions, and their application to selected planets and one of Jupiter’s moons, Ganymede.

The reaction of tertiary, secondary and benzylic alcohols with different nitriles in the presence of alumina-methanesulfonic acid (AMA) as a new reagent affords the corresponding amides in good yields (Table 1, 2). Conversion of 2,6-bis(hydroxymethyl)-4-halo anisoles into corresponding diamides in the range of 68-76% yields (Table 3) are also included in this paper.

The halo fixator may be used for the definitive treatment of cervical spine trauma, preoperative reduction in the patient with spinal deformity, and adjunctive postoperative stabilization following cervical spine surgery. Halo fixation decreases cervical motion by 30% to 96%. Absolute contraindications include cranial fracture, infection, and severe soft-tissue injury at the proposed pin sites....

Optical and near-IR observations of the halos of disk galaxies and blue compact galaxies have revealed a very red spectral energy distribution which cannot easily be reconciled with a normal, metal-poor stellar population like that in the stellar halo of the Milky Way. Here, spectral evolutionary models are used to explore the consequences of these observations. We demonstrate that a stellar po...

1. Universidade Federal Fluminense, Niterói (RJ) Brasil. 2. Universidade Federal do Rio de Janeiro, Rio de Janeiro (RJ) Brasil. 3. Santa Casa de Misericórdia de Porto Alegre, Porto Alegre (RS) Brasil. 4. Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre (RS) Brasil. 5. Faculdade de Medicina de Petrópolis, Petrópolis (RJ) Brasil. A 49-year-old male smoker (with a smoking hi...