2006 LNO Annual Report to the Executive Board

This report summarizes activities and accomplishments of the LTER Network Office (LNO) during the period March 1, 2005 until February 28, 2006. Along with the survey of sites administered by the Executive Board, this document will be used to facilitate the annual review of LNO performance. - Presented to the LTER Excutive Boar

Understanding Legacy Workflows through Runtime Trace Analysis

abstract: When scientific software is written to specify processes, it takes the form of a workflow, and is often written in an ad-hoc manner in a dynamic programming language. There is a proliferation of legacy workflows implemented by non-expert programmers due to the accessibility of dynamic languages. Unfortunately, ad-hoc workflows lack a structured description as provided by specialized management systems, making ad-hoc workflow maintenance and reuse difficult, and motivating the need for analysis methods. The analysis of ad-hoc workflows using compiler techniques does not address dynamic languages - a program has so few constrains that its behavior cannot be predicted. In contrast, workflow provenance tracking has had success using run-time techniques to record data. The aim of this work is to develop a new analysis method for extracting workflow structure at run-time, thus avoiding issues with dynamics. The method captures the dataflow of an ad-hoc workflow through its execution and abstracts it with a process for simplifying repetition. An instrumentation system first processes the workflow to produce an instrumented version, capable of logging events, which is then executed on an input to produce a trace. The trace undergoes dataflow construction to produce a provenance graph. The dataflow is examined for equivalent regions, which are collected into a single unit. The workflow is thus characterized in terms of its treatment of an input. Unlike other methods, a run-time approach characterizes the workflow's actual behavior; including elements which static analysis cannot predict (for example, code dynamically evaluated based on input parameters). This also enables the characterization of dataflow through external tools. The contributions of this work are: a run-time method for recording a provenance graph from an ad-hoc Python workflow, and a method to analyze the structure of a workflow from provenance. Methods are implemented in Python and are demonstrated on real world Python workflows. These contributions enable users to derive graph structure from workflows. Empowered by a graphical view, users can better understand a legacy workflow. This makes the wealth of legacy ad-hoc workflows accessible, enabling workflow reuse instead of investing time and resources into creating a workflow.Dissertation/ThesisMasters Thesis Computer Science 201

Year 1 Report: Center for Trustworthy Scientific Cyberinfrastructure

This material is based in part on work supported by the National Science Foundation under Grant Number OCI-1234408. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation

2003 LTER Network Office Annual Report

A Report from the Network Office of the U.S. Long Term Ecological Research Network for work accomplished in Year 1 of DEB-0236154. December 16, 200

VIMS 75th Anniversary Alumni Research Symposium : October 8-9, 2015, Gloucester Point, Virginia

Program brochure and agenda for the symposium. Also available online are some of the presentations and posters from the conference

PICES Press, Vol. 25, No. 1, Winter 2017

PICES science in 2016: A note from the Science Board Chair (pp. 1-8); 2016 PICES awards (pp. 9-12); PICES calendar of events (pp. 13-13); Impressions of PICES from old friends (pp. 14-17); S-CCME Workshop W5, “Modeling effects of climate change on fish and fisheries (pp. 18-22); In memoriam: Professor Emeritus Paul J. Harrison (pp. 23-23); Workshop W9, “The role of the northern Bering Sea in modulating arctic environments” (pp. 24); A symposium to mark the 60th anniversary of Station Papa/Line P (pp. 28-29); To the interface and beyond: Results and legacy of SCOR Working Group 140 (pp. 30-31); Webcam monitoring and modeling of Japanese tsunami marine debris (pp. 32-35); Mapping patterns of marine debris in the main Hawaiian Islands using aerial imagery and spatial analysis (pp. 36-39); New leadership in PICES (pp. 40-44); PICES interns (pp. 45-45); The Bering Sea: Current status and recent trends (pp. 46-49); The state of the western North Pacific during the 2016 warm season (pp. 50-51

Developing a distributed electronic health-record store for India

The DIGHT project is addressing the problem of building a scalable and highly available information store for the Electronic Health Records (EHRs) of the over one billion citizens of India