A MIP-based Energy Calibration of the STAR Endcap Electromagnetic Calorimeter

One of the main goals of the STAR Spin Collaboration is to understand the intrinsic angular momentum of the proton. An integral part of this experiment is the Endcap Electromagnetic Calorimeter (EEMC). The EEMC is used in detecting particles produced from hard proton-proton collisions that end up in the forward direction or \u27end\u27 of the experimental apparatus. In order to use properly the data collected, the energy and position measurements in the EEMC need to be well-known. To accomplish this, an energy calibration of the EEMC was performed using minimum ionizing particles (MIPs). The important property of MIPs utilized was that they will deposit a new amount of energy into a material. Knowing the composition of the EEMC, the expected amount of energy is also known. The MIPs then deposit this energy, which is measured and compared to the expected energy. A calibration constant is then calculated from this comparison. A description of this method and the current status of the energy calibration will be presented with results

Acoustic Signals of \u3ci\u3eGraminella Nigrifrons\u3c/i\u3e (Homoptera: Cicadellidae)

The deltocephaline leafhopper, Graminella nigrifrons, produces low intensity sub- strate transmitted vibrations (signals) to facilitate location of virgin females by males during courtship. In the laboratory, signals produced on maize leaves were received by a phonographic cartridge, amplified, and analyzed on an oscillograph and sonograph. Male calls, that are produced spontaneously, are complex, consisting of three consecutive sections. Section 1 consists of ca. 3 sec of irregular clicks. Section 2 has ca. 4 sec of repeated phrases consisting of a continuous series of 0.4 sec chirps and a roll. Section 3 consists of ca. 5 sec of an intermittent series of 0.2 sec chirps and a roll. Female calls are produced in response to male calls. Female calls are simple compared to male calls and consist of ca. 4-5 sec of low frequency clicking. Signal patterns of G. nigrifrons are compared to those of other leafhoppers and evolutionary scenarios are presented to account for the observed gender differ­ences in signals

Entre la théologisation du politique et la politisation du théologique : en lisant Carl Schmitt

L’auteur analyse la notion de théologie politique chez Carl Schmitt. Reconnaissant l’impossibilité d’isoler le politique du religieux, l’auteur se demande s’il y a une théologie sous-jacente à la pensée de Schmitt, et cherche à en dégager les principaux axes.The author analyses the notion of political theology in the works of Carl Schmitt. Recognizing that the political and the religious are inextricably linked, Nault examines Schmitt’s “decisionism” with a view to uncovering its theological dimensions