Validation of spallation neutron production and propagation within Geant4

Using simulations to understand backgrounds from muon-induced neutrons is important in designing next-generation low-background underground experiments. Validation of relevant physics within the Geant4 simulation package has been completed by comparing to data from two recent experiments. Verification focused on the production and propagation of neutrons at energies important to underground experiments. Discrepancies were observed between experimental data and the simulation. Techniques were explored to correct for these discrepancies.Comment: 12 pages, 6 figures, 5 tables, submitted to NIM A. 6 Aug 200

Computer experiment - a case study for modelling and simulation of manufacturing systems

Deterministic computer simulation of physical experiments is now a common technique in science and engineering. Often, physical experiments are too time consuming, expensive or impossible to conduct. Complex computer models or codes, rather than physical experiments lead to the study of computer experiments, which are used to investigate many scientific phenomena. A computer experiment consists of a number of runs of the computer code with different input choices. The Design and Analysis of Computer Experiments is a rapidly growing technique in statistical experimental design. This paper aims to discuss some practical issues when designing a computer simulation and/or experiments for manufacturing systems. A case study approach is reviewed and presented

Experimental Analysis

Central to good science are accurate observations, testable hypotheses, well-designed experiments or other tests, and reasonable data analyses. The purpose of this activity is to introduce the basics of designing and analyzing experiments. This is accomplished by using a computer simulation that involves the real-world industry of farming fish. The two laboratory exercises include further steps in organizing and analyzing data. Educational levels: Undergraduate lower division, High school

Review of Recent and Future Needs in Hadronic Flavor Particle Production Measurements

Interactions of energetic particles on target nuclei producing secondary particles will be reviewed. Current simulation codes rely upon poorly measured results from the past. While current neutrino experiments, both atmospheric and accelerator based, rely upon Kaon and pion production measurements which are poorly known and dominate their errors. The goal for the current round of experiments are to dramatically improve these measurements while improvments beyond this are still needed. It is not only of interest to neutrino experiments, but also for designing calorimeters for the the International Linear Collider which must achieve unprecedented resolutions for reaching their stated physics goals.Comment: BEACH 2006, Lancaster, England Planery talk on Hadronic Flavor Cross-Section Measrument

Software Design for Empowering Scientists

Scientific research is increasingly digital. Some activities, such as data analysis, search, and simulation, can be accelerated by letting scientists write workflows and scripts that automate routine activities. These capture pieces of the scientific method that scientists can share. The averna Workbench, a widely deployed scientific-workflow-management system, together with the myExperiment social Web site for sharing scientific experiments, follow six principles of designing software for adoption by scientists and six principles of user engagement

Re-designing Dynamic Content Delivery in the Light of a Virtualized Infrastructure

We explore the opportunities and design options enabled by novel SDN and NFV technologies, by re-designing a dynamic Content Delivery Network (CDN) service. Our system, named MOSTO, provides performance levels comparable to that of a regular CDN, but does not require the deployment of a large distributed infrastructure. In the process of designing the system, we identify relevant functions that could be integrated in the future Internet infrastructure. Such functions greatly simplify the design and effectiveness of services such as MOSTO. We demonstrate our system using a mixture of simulation, emulation, testbed experiments and by realizing a proof-of-concept deployment in a planet-wide commercial cloud system.Comment: Extended version of the paper accepted for publication in JSAC special issue on Emerging Technologies in Software-Driven Communication - November 201

Analytical determination of space station response to crew motion and design of suspension system for microgravity experiments

The objective of this investigation is to make analytical determination of the acceleration produced by crew motion in an orbiting space station and define design parameters for the suspension system of microgravity experiments. A simple structural model for simulation of the IOC space station is proposed. Mathematical formulation of this model provides the engineers a simple and direct tool for designing an effective suspension system

Characterization and Verification Environment for the RD53A Pixel Readout Chip in 65 nm CMOS

The RD53 collaboration is currently designing a large scale prototype pixel readout chip in 65 nm CMOS technology for the phase 2 upgrades at the HL-LHC. The RD53A chip will be available by the end of the year 2017 and will be extensively tested to confirm if the circuit and the architecture make a solid foundation for the final pixel readout chips for the experiments at the HL-LHC. A test and data acquisition system for the RD53A chip is currently under development to perform single-chip and multi-chip module measurements. In addition, the verification of the RD53A design is performed in a dedicated simulation environment. The concept and the implementation of the test and data acquisition system and the simulation environment, which are based on a modular data acquisition and system testing framework, are presented in this work

Characterisation of an automated Dual Piston Pressure Swing Adsorption (DP-PSA) system

AbstractThe drive to fast Pressure Swing Adsorption (PSA) processes leads to the challenge of designing and analysing experiments that allow the testing of adsorbents under fast cycle conditions. Here we present the Dual Piston-Pressure Swing Adsorption (DP-PSA) system and the accompanying mathematical model designed for this purpose. The comparisons of experimental and simulation results show that for slow cycles often an isothermal model is sufficient. However, for fast cycles the temperature profile over the cycle has to be taken into account to describe accurately the experimental curves; this is essential for the estimation of the parameters of the adsorbent material under fast cycle conditions