VLAM‐G: A Grid‐Based Virtual Laboratory

Abstract

The Grid-based Virtual Laboratory AMsterdam (VLAM-G), provides a science portal for distributed analysis in applied scientific research. It offers scientists remote experiment control, data management facilities and access to distributed resources by providing cross-institutional integration of information and resources in a familiar environment. The main goal is to provide a unique integration of existing standards and software packages. This paper describes the design and prototype implementation of the VLAM-G platform. In this testbed we applied several recent technologies such as the Globus toolkit, enhanced federated database systems, and visualization and simulation techniques. Several domain specific case studies are described in some detail. Information management will be discussed separately in a forthcoming paper.

Measurement-Driven Simulation of Complex Engineering Systems

“…We have combined the measurements of both detection systems in several combinations and found out that classification purely on the inductive loop length is not always correct [89]. 3 For instance, by setting a threshold of 6 meters on the length 4% of the trucks are missed and a considerable amount of false positives are generated: cars and vans are classified as trucks (19%). When the classification is based on the laser curtain height and width measurements no cars or vans are classified as trucks (for a 5 minutes validation interval) and 10% of the trucks are classified as vans.…”

“…The Geodise and Netsolve projects made the connection to both the execution management part and the data management part of the Grid. In our approach, only a connection to the execution management was made, because VLAM-G [3] handles the data management part [50] with generic data communication channels (partly build on GridFTP [4]). …”

“…Our research group participated in the Grid-based Virtual Laboratory Amsterdam (VLAM-G) [3]. VLAM-G had as goal to hide resource access details from scientific users, and to allow scientific programmers to build scientific portals.…”

Towards a Formal Foundation for Aggregating Scientific Workflows

“…In scientific workflow research many different implementations of workflow systems exist [2,3,4,5]. These systems vary in the formal models by which workflows are described and execution semantics are interpreted, sometimes even allowing multiple execution models within one system [2].…”

An Experiment for the Virtual Traffic Laboratory: Calibrating Speed Dependency on Heavy Traffic

“…Our department participated in the Grid-based Virtual Laboratory Amsterdam (VLAM-G) [9]. VLAM-G had as goal to hide resource access details from scientific users, and to allow scientific programmers to build scientific portals.…”