Positioning system of the ANTARES Neutrino Telescope

Completed in May 2008, the ANTARES neutrino telescope is located 40 km off the coast of Toulon, at a depth of about 2500 m. The telescope consists of 12 detect or lines housing a total of 884 optical modules. Each line is anchored to the seabed and pulled taught by the buoyancy of the individual optical modules and a top buoy. Due to the fluid nature of the sea-water detecting medium and the flexible nature of the detector lines, the optical modules of the ANTARES telescope can suffer from deviations of up to several meters from the vertical and as such, real time positioning is needed. Real time positioning of the ANTARES telescope is achieved by a combination of an acoustic positioning system and a lattice of tiltmeters and compasses. These independent and complementary systems are used to compute a global fit to each individual detector line, allowing us to construct a 3 dimensional picture of the ANTARES neutrino telescope with an accuracy of less than 10 cm. In this paper we describe the positioning system of the ANTARES neutrino telescope and discuss its performance during the first year of 12 line data taking.Comment: Proceedings of 31st ICRC conference, Lodz 2009, 4 pages, 3 picture

Fully articulated four-point-bend loading fixture

A fully articulated four-point bend loading fixture for Modulus of Rupture (MOR) and fracture toughness specimens utilizes an upper loading plate in combination with a lower loading plate. The lower plate has a pair of spring loaded ball bearings which seat in V-shaped grooves located in the upper plate. The ball bearings are carried in the arms of the lower plate. A load is applied to the specimen through steel rollers, one large roller and one smaller roller each located on both the upper and lower plates. The large rollers have needle roller bearings which enable a single loading roller to rotate relative to the plate to which it is attached

Regular Polyhedra of Index Two, II

A polyhedron in Euclidean 3-space is called a regular polyhedron of index 2 if it is combinatorially regular and its geometric symmetry group has index 2 in its combinatorial automorphism group; thus its automorphism group is flag-transitive but its symmetry group has two flag orbits. The present paper completes the classification of finite regular polyhedra of index 2 in 3-space. In particular, this paper enumerates the regular polyhedra of index 2 with vertices on one orbit under the symmetry group. There are ten such polyhedra.Comment: 33 pages; 5 figures; to appear in "Contributions to Algebra and Geometry

Monetary policy: stability through change.

The recent business cycle has been driven by two forces: a series of extraordinary events and some longer term secular trends. In "Monetary Policy: Stability Through Change," President Anthony Santomero discusses how these extraordinary events, including the bursting of the tech bubble, the aftermath of 9/11, the wars in Afghanistan and Iraq, and the corporate accounting and governance scandals, have affected the U.S. economy. He then turns his focus to the longer term trends, including rapidly changing technology and the increasingly integrated global marketplace, which he expects to be the key drivers of our economy in the future.Monetary policy

Making monetary policy: what do we know and when do we know it?

President Anthony Santomero points out that conducting a successful monetary policy presents real-world challenges, such as evaluating where the economy is, where it is going, and where it should be going. But how do monetary policymakers make decisions about the economy in a world with imperfect information? Santomero discusses how policymaking is affected by both the availability and reliability of economic information. He concludes that given the information constraints policymakers face, the challenges of setting monetary policy will not go away, so we must find a way to meet themMonetary policy

Monetary policy and inflation targeting in the United States.

Should monetary policymakers in the U.S. adopt explicit inflation targeting? After all, the Fed has steadily reduced inflation over the past 25 years without resorting to an explicit inflation target. But having achieved price stability, we must now deal with the matter of maintaining it. In "Monetary Policy and Inflation Targeting in the United States," President Anthony Santomero returns to the topic of inflation targeting, which he first discussed in the spring of 2003. This time, he expands that discussion by proposing a specific inflation targeting programMonetary policy ; Inflation (Finance)

New beginnings

In his first column, President Santomero talks about "New Beginnings" by introducing himself to the Business Review audience and by listing some of the challenges facing the Philadelphia metropolitan area and some options for dealing with themEconomic conditions - Federal Reserve District, 3rd

A farewell from President Santomero

President Anthony M. Santomero reflects on the economic challenges and changes during his tenure as president over the past six years and summarizes some of the Bank’s accomplishments.