THE SYNONYMY OF HELICE CHAMBERS AND THEISOA CHAMBERS. (MICROLEPIDOPTERA)

The HERMES Back Drift Chambers

The tracking system of the HERMES spectrometer behind the bending magnet consists of two pairs of large planar 6-plane drift chambers. The design and performance of these chambers is described. This description comprises details on the mechanical and electronical design, information about the gas mixture used and its properties, results on alignment, calibration, resolution, and e ciencies, and...

Distinguishing the Chambers of the Moment Polytope

Let M be a compact manifold with a Hamiltonian T action and moment map Φ. The restriction map in equivariant cohomology from M to a level set Φ(p) is a surjection, and we denote the kernel by Ip. When T has isolated fixed points, we show that Ip distinguishes the chambers of the moment polytope for M . In particular, counting the number of distinct ideals Ip as p varies over different chambers ...

Drift and Proportional Tracking Chambers

Filter Bubbles , Echo Chambers , And

Online publishing, social networks, and web search have dramatically lowered the costs of producing, distributing, and discovering news articles. Some scholars argue that such technological changes increase exposure to diverse perspectives, while others worry that they increase ideological segregation. We address the issue by examining webbrowsing histories for 50,000 US-located users who regul...

Adding Value? the Role of Second Chambers

In the study of legislatures, little attention is given to the second chambers of bicameral parliaments. We know something about some second chambers, most notably the US Senate, but relatively little is known about second chambers as a particular species of institution. To some extent, this is attributable to their perceived subordinate status. They are second chambers. In bicameral systems, r...