Laboratory for Simulation Development

This document contains a description of the main purposes and characteristics of Lsd. It discusses the problems related to the use of simulations in social sciences and describes how Lsd tackles these problems. In general, the use of simulations is constrained by two kinds of problems: difficulties in building the programs and difficulties to make use of other people’s programs. Lsd proposes a system to facilitate both aspects of the use of simulation models. This document is mainly concerned with the use of simulations by unskilled computer users, and describes in detail how Lsd can be successfully used to explore and use a model without requiring any programming knowledge. Though it is not the main concern of the document, there are also few hints on the aspect of simulation program building.Programming, Simulation models

Kerangka rekabentuk Carta Selak Rangkaian Berintegrasi Teori Gagne Sembilan Peristiwa Pembelajaran

Kajian ini merupakan sebuah kajian terhadap Kerangka Rekabentuk Carta Selak Rangkaian Berintegrasi Teori Gagne Sembilan Peristiwa Pembelajaran. Tujuan kajian ini dilakukan adalah bagi mencadangkan sebuah Kerangka Rekabentuk Carta Selak Rangkaian Berintegrasi Teori Gagne Sembilan Peristiwa Pembelajaran yang sesuai diaplikasikan oleh bakal guru dan juga guru bagi sebuah sesi pengajaran dan pembelajaran yang berkesan dan seterusnya meningkatkan kefahaman dan pengetahuan pelajar dalam mata pelajaran yang diajar oleh guru. Metodologi yang digunakan adalah berdasarkan Model ADDIE iaitu peringkat analisis, peringkat rekabentuk, peringkat pembangunan, peringkat implimentasi dan peringkat penilaian. Hasil daripada dapatan kajian yang menggunakan model TAM melihat persepsi dari kebergunaan (tahap tinggi dan min 3.02), kesenangan mengguna (tahap tinggi dan min 3.03) dan sikap penggunaan ( diterima dan min 2.65) terhadap Kerangka Rekabentuk Carta Selak Rangkaian Berintegrasi Teori Gagne Sembilan Peristiwa Pembelajaran. Dapatan tersebut menunjukkan bahawa ia digunakan dalam sesi pengajaran dan pembelajaran di bilik darjah oleh responden pada masa hadapan. Cadangan kajian pada masa hadapan adalah berkaitan spesifikasi dan teknikal kerangka rekabentuk supaya dapat memudahkan pembinaan kerangka, menjimatkan kos dan masa

Towards the Holy Grail: combining system dynamics and discrete-event simulation in healthcare

The idea of combining discrete-event simulation and system dynamics has been a topic of debate in theoperations research community for over a decade. Many authors have considered the potential benefits ofsuch an approach from a methodological or practical standpoint. However, despite numerous examples ofmodels with both discrete and continuous parameters in the computer science and engineering literature,nobody in the OR field has yet succeeded in developing a genuinely hybrid approach which truly integratesthe philosophical approach and technical merits of both DES and SD in a single model. In this paperwe consider some of the reasons for this and describe two practical healthcare examples of combinedDES/SD models, which nevertheless fall short of the “holy grail” which has been so widely discussed inthe literature over the past decade

Simulation Application for the LHCb Experiment

We describe the LHCb detector simulation application (Gauss) based on the Geant4 toolkit. The application is built using the Gaudi software framework, which is used for all event-processing applications in the LHCb experiment. The existence of an underlying framework allows several common basic services such as persistency, interactivity, as well as detector geometry description or particle data to be shared between simulation, reconstruction and analysis applications. The main benefits of such common services are coherence between different event-processing stages as well as reduced development effort. The interfacing to Geant4 toolkit is realized through a facade (GiGa) which minimizes the coupling to the simulation engine and provides a set of abstract interfaces for configuration and event-by-event communication. The Gauss application is composed of three main blocks, i.e. event generation, detector response simulation and digitization which reflect the different stages performed during the simulation job. We describe the overall design as well as the details of Gauss application with a special emphasis on the configuration and control of the underlying simulation engine. We also briefly mention the validation strategy and the planing for the LHCb experiment simulation.Comment: Talk from the 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003, 6 pages, LaTeX, 9 eps figures. PSN TUMT00

Science teachers' transformations of the use of computer modeling in the classroom: using research to inform training

This paper, from the UK group in the STTIS (Science Teacher Training in an Information Society) project, describes research into the nature of teachers' transformations of computer modeling, and the development of related teacher training materials. Eight teacher case studies help to identify factors that favor or hinder the take-up of innovative computer tools in science classes, and to show how teachers incorporate these tools in the curriculum. The training materials use the results to provide activities enabling teachers to learn about the tools and about the outcomes of the research into their implementation, and help them to take account of these ideas in their own implementation of the innovations

Digital Ecosystems: Ecosystem-Oriented Architectures

We view Digital Ecosystems to be the digital counterparts of biological ecosystems. Here, we are concerned with the creation of these Digital Ecosystems, exploiting the self-organising properties of biological ecosystems to evolve high-level software applications. Therefore, we created the Digital Ecosystem, a novel optimisation technique inspired by biological ecosystems, where the optimisation works at two levels: a first optimisation, migration of agents which are distributed in a decentralised peer-to-peer network, operating continuously in time; this process feeds a second optimisation based on evolutionary computing that operates locally on single peers and is aimed at finding solutions to satisfy locally relevant constraints. The Digital Ecosystem was then measured experimentally through simulations, with measures originating from theoretical ecology, evaluating its likeness to biological ecosystems. This included its responsiveness to requests for applications from the user base, as a measure of the ecological succession (ecosystem maturity). Overall, we have advanced the understanding of Digital Ecosystems, creating Ecosystem-Oriented Architectures where the word ecosystem is more than just a metaphor.Comment: 39 pages, 26 figures, journa