Susygen3, an Event Generator for Linear Colliders

The Monte Carlo program \texttt{SUSYGEN}, initially designed for computing distributions and generating events for supersymmetric particle production in $e^+e^-$ collisions, has now been upgraded to study supersymmetric processes at linear colliders by the inclusion of beamstrahlung, beam polarization, spin correlations and complex couplings including CP violating phases. It continues to offer, in the new context, the possibility to study the production and decay of supersymmetric particles within the most general minimal standard supersymmetric model (MSSM), the minimal supergravity model (MSUGRA) or the gauge mediated supersymmetry breaking model (GMSB), with or without assuming R-parity conservation.Comment: 5 pages, 3figures. Contribution to the Proceedings of the International Workshop on Linear Colliders, Sitges (Spain

The TESLA Time Projection Chamber

A large Time Projection Chamber is proposed as part of the tracking system for a detector at the TESLA electron positron linear collider. Different ongoing R&D studies are reviewed, stressing progress made on a new type readout technique based on Micro-Pattern Gas Detectors.Comment: 5 pages, 8 figures; Proceeding for the topical Seminar on Innovative Particle and Radiation Detectors Siena, 21-24 October 2002; to appear in Nucl.Phys. B (Proceedings Supplement

Centralization Versus Decentralization in Credit Lending

This paper explores different organizational forms in terms of their ability to generate information about investment projects and allocate capital to these projects efficiently. A decentralized approach-with small, single-manager firms- is most likely to be attractive when information about individual projects is “non-verifiable” and cannot be credibly transmitted. Moreover, holding fixed firm size, non-verifiable information also favors flatter organizations with fewer layers of management. In contrast, large hierarchical firms with multiple layers of management are at comparative advantage when information can be costlessly “verified” and passed along within the hierarchy. As a concrete application of the theory, the paper discusses the consequences of consolidation in the banking industry. It has been documented that when large banks acquire small banks, there is a pronounced decline in lending to small businesses. To the extent that small-business lending relies heavily on non-verifiable information, this is exactly what the theory would lead one to expect.

Compilation of SUSY particle spectra from Snowmass 2001 benchmark models

A comparative study of supersymmetric particle spectra calculated by the programs ISAJET, SUSYGEN and PYTHIA is presented for various SUSY scenarios defined at the Snowmass 2001 workshop.Comment: 91 pages, 26 figure

A DAQ System for Linear Collider TPC Prototypes based on the ALEPH TPC Electronics

Within the international studies of a high energy linear electron positron collider, several groups are developing and testing prototypes for a Linear Collider TPC. This detector is planned to be used as a central part in the tracking system of a detector at such a machine. In this note we describe a DAQ system, which has been developed for the use in tests of TPC prototypes. It is based on electronics used at the ALEPH experiment at CERN.Comment: 15 pages, 4 figure

The Cross - cultural impacts on technology entrepreneurship: a comparative case study between France and Tunisia: toward a technology park development transfer index

The change in economic and manageria l direct ions in recent years has led into questions about the context of entrepreneurship on the light of the radical change in the g lobal econo my and the development of science and technology. These have opened up new opportunities and restated the principles of prosperity based on a new vision of a global economy. Porter (1990, 1998a , 1998b) made fa mous the global co mpetition strategy (i.e. the competitive advantage of nations) by recognizing that clustering strategy lead to gain a competitive advantage in a globalized economy. The transition fro m macro to micro level, induced by technological advances, resulted in a revised competitive strategy with a global scope (Porter and Stern, 1999). Competition is now based on the concept of global city regions (Scott, 2001). Econo mic opportunities associated with technology parks has become global because of the high added value provided by the ICT industry. Several authors suggested criteria’s by which an area creates attractive environment for technology entrepreneurs, (Saxenian & al 2001; Florida, 2002a , 2002b; Kenney and Vburg, 1999). These ICT incubator areas reflect and focus on human skills (Venkatara man, 2004; Bernhard, 2007). Based in the fact that innovation location and technology entrepreneurship process are interlinked to talents and competencies then location of the technology parks can impact their success (Steve, 2007; Saxenian & al, 2001; Srinivas and Scott, 2002; Athreye, 2002, Francis & al, 2003; Aavari & a l, 2004)

ICT job shifts and ICT cluster assessment: an exploratory study through an ICT cluster in an emergent country: The case of El Gazala in Tunisia

The new ICT global strategy rely on micro-economic foundations of innovation. Those elements are concentrating in ICT Clusters. Previous research on competitive advantage of ICT Clustering strategy focused on geographic location of innovation and talent, institutional and economic issues. Today, competition and ICT Clusters rely on ICT jobs that shifted from location to another. In this paper we try to explore how ICT jobs are shifted from developed countries to developing countries on the basis of ICT Clustering strategy. ICT Job shifts assessment is a new concern for ICT Clustering strategy. Propositions and conceptual model for this study are applied with an exploratory study on El Gazala ICT Cluster in Tunisia. We find that Tunisian ICT cluster is on the way to establish a competitive advantage with ICT Job shifts, despite some weaknesses

A parabolic trough solar collector as a solar system for heating water: a study based on numerical simulation

This paper is an optical and thermal study of a small model of a parabolic trough solar collector (CTP), which will be used to heat tap water in the winter at Guemar, El-Oued province, Algeria. A mathematical model drawn from the energy balance equation applied to the absorber tube, this model was solved by the finite difference method. A computer program was developed to solve our problem. MATLAB was used as a tool for numerical simulation where it is used to calculate dynamic shifts at the level of the absorbent tube. The results are very honorable and encouraging, where the thermal efficiency of the concentrator had passed 61%, and the fluid temperature had passed 343 K

An experimental study of surface pressure fluctuations in a separating turbulent boundary layer

Measurements of streamwise velocity fluctuation and surface pressure fluctuation spectra and wavespeeds are reported for a well-documented separating turbulent boundary layer. Because a portion of the acoustic pressure fluctuations is the same across the nominally two-dimensional turbulent flow, it is possible to decompose two microphone signals and obtain directly the turbulent flow contributions to the surface pressure spectra. The rms surface pressure fluctuation p' and spectra phi(omega) increase through the adverse pressure gradient attached flow region and the detached flow zone and scale on the maximum turbulent shearing stress tau(M); p'/tau(M) increases to the detachment location and decreases downstream due to the rapid movement of the pressure-fluctuation-producing motions away from the wall after the beginning of intermittent backflow. At lower frequencies for the attached flow phi(omega) is approximately omega to the -0.7 while phi(omega) is approximately omega to the -3 at higher frequencies. After the beginning of intermittent backflow, phi(omega) varies with omega at low frequencies and omega to the -3 at high frequencies; farther downstream the lower frequency range varies with omega to the 2.4. The surface pressure fluctuation celerity for the attached flow increases with frequency and agrees with the semi-logarithmic overlap equation of Panton and Linebarger. After the beginning of the separation process, the wavespeed decreases because of the oscillation of the instantaneous wavespeed direction and the streamwise coherence decreases drastically