Three computer programs for n-body trajector- ies and interplanetary trajectories

Input and operating instructions, and sample problems for IBM 7094 computer programs - interplanetary trajectory program, n-body trajectory program, and sensitivity coefficient

Distillation of Strangelets for low initial mu/T

We calculate the evolution of quark-gluon-plasma droplets during the hadronization in a thermodynamical model. It is speculated that cooling as well as strangeness enrichment allow for the formation of strangelets even at very high initial entropy per baryon $S/A^{\rm init}\approx 500$ and low initial baryon numbers of $A_{\rm B}^{\rm init}\approx 30$. It is shown that the droplet with vanishing initial chemical potential of strange quarks and a very moderate chemical potential of up/down quarks immediately charges up with strangeness. Baryon densities of $\approx 2\rho_0$ and strange chemical potentials of $\mu_s>350$~MeV are reached if strangelets are stable. The importance of net--baryon and net--strangeness fluctuations for the possible strangelet formation at RHIC and LHC is emphasized

Development and tests of Double-sided Silicon Strip Detectors and Read-Out Electronics for the Internal Tracking System of ALICE at LHC

Presentation given at Quark Matter '99, Torino, Italy, 10-15 May 1999The internal-tracking-system (ITS) of the ALICE detector at LHC consists of six concentrical barrels of silicon detectors. The outmost two layers are made of double-sided strip detectors (SSD). In the framework of R&D, the characteristics and performances of these devices, manufactured by two different companies, associated with their designed read-out electronics, have been studied off- and in-beam at the SPS (CERN). The results are presented and discussed

Search for Strangeness at new Ultra-relativistic Heavy-ion Colliders

The Relativistic Heavy-Ion Collider (RHIC) is operating since a few months. The Large Hadron Collider (LHC) will be operational around 2005. They will be served by several experiments of considerable scale. Among them, the STAR and the ALICE experiments are dedicated to the study of fundamental aspects linked to an expected phase transition between the hadronic and a deconfined-quark state of nuclear matter. Numerous experimental approaches are offered by the versatility of these experiments, one of the most effective is the study of the strangeness production. An expected intringing form of strangeness is the Ho, the result of a uuddss quark state or of a 2Lambdao aggregation. The presentation will deal with the strangeness study and with possible experimental attempts to identify such a Ho nuclear state, thus extending the promising general study of strangeness

Frequency and timing system for the consolidated DSN and STDN tracking network

The consolidation on the existing Deep Space Network (DSN) and colocated Goddard Spaceflight Tracking and Data Network (STDN) stations into a multiple antenna array is discussed. Each site includes a signal processing center (SPC) centered in an array of four or five antennas each located within approximately 300 to 800 meters of the SPC. A central frequency and timing system (FTS) located in the SPC contains reference frequency, timing and time code generation, and distribution equipment for both the SPC and each antenna with its associated front end antenna control building. The reference frequency distribution and clock equipment are driven by a hydrogen maser as the prime frequency standard with cesium beam frequency standard as the secondary

Learning the language of school history: the role of linguistics in mapping the writing demands of the secondary school curriculum

This paper reports on a research study which used the tools of functional linguistics to illuminate the writing requirements of the history curriculum in the context of Australian secondary schools. It shows how the resulting linguistic description was integrated into a sequence of teaching and learning activities through collaboration between linguist specialists and content/pedagogic specialists. These activities were designed to facilitate students’ writing skills whilst simultaneously developing their historical knowledge. An independent evaluation of the approach pointed to positive changes in teachers’ attitudes and behaviours regarding the role of language in learning history. Equally, students’ writing improved, particularly in terms of its organisation and structure