A Revised Analysis of the Open Grid Services Infrastructure

This paper began its life as an unpublished technical review citeanalysis of the proposed Open Grid Services Architecture (OGSA) as described in the papers, ``The Physiology of the Grid'' citefoster by Ian Foster, Carl Kesselman, Jeffrey Nick and Steven Tuecke, and ``The Grid Service Specification (Draft 2/15/02) citeogsi'' by Foster, Kesselman, Tuecke and Karl Czajkowski, Jeffrey Frey and Steve Graham. However, much has changed since the publication of the original documents. The architecture has evolved substantially and the vast majority of our initial concerns have been addressed. In this paper we will describe the evolution of the specification from its original form to the current draft of 10/4/02 authored by S. Tuecke, K. Czajkowski, J. Frey, S. Graham, C. Kesselman, and P. Vanderbilt, which is now the central component of the Global Grid Forum Open Grid Service Infrastructure (OGSI) working group which is co-chaired by Steven Tuecke and David Snelling

Directions in parallel programming: HPF, shared virtual memory and object parallelism in pC++

Fortran and C++ are the dominant programming languages used in scientific computation. Consequently, extensions to these languages are the most popular for programming massively parallel computers. We discuss two such approaches to parallel Fortran and one approach to C++. The High Performance Fortran Forum has designed HPF with the intent of supporting data parallelism on Fortran 90 applications. HPF works by asking the user to help the compiler distribute and align the data structures with the distributed memory modules in the system. Fortran-S takes a different approach in which the data distribution is managed by the operating system and the user provides annotations to indicate parallel control regions. In the case of C++, we look at pC++ which is based on a concurrent aggregate parallel model

Extensible Terascale Facility (ETF): Indiana-Purdue Grid (IP-Grid)

NSF Award ID: ACI-0338618 Project Dates: 10/1/03-9/30/0

Peer-to-Peer Grids

We describe Peer-to-Peer Grids built around Integration of technologies from the peer-to-peer and Grid fields. We focus on the role of Web services linked by a powerful event service using uniform XML interfaces and application level routing. We describe how a rich synchronous and asynchronous collaboration environment can support virtual communities built on top of such infrastructure. Universal access mechanisms are discussed

Asynchronous Peer-to-Peer Web Services and Firewalls

In this paper we test the suitability of Java to implement a scalable Web Service that solves a set of problems related to peer-to-peer interactions between Web Services that behind firewalls or not generally accessible. In particular we describe how to enable reliable and long running conversations through firewalls betweenWeb Service peers have no accessible network endpoints. Our solution is to implement in Java aWeb Services Dispatcher (WSD) that is an intermediary service that forwards messages and can facilitate message exchanges by supporting SOAP RPC over HTTP and WS-Addressing for asynchronous messaging. We describe how Web Service clients that have no network endpoints, such as applets, can become Web Service peers by using an additional message store-and-forward service ("mailbox"). Then we conduct a set of experiments to evaluate performance of Java implementation in realistic Web Service scenarios, involving intercontinental tests between France and the US

Health Status and Preventive Health Services Among Reproductive-Aged Women in Treatment for Opioid Use Disorder

OBJECTIVE: To assess the utilization of preventive health services and the prevalence of chronic health conditions among a cohort of women in treatment for opioid use disorder (OUD). METHODS: Ninety-seven women who were receiving treatment for OUD from a single urban treatment program completed a self-administered anonymous online questionnaire that asked about demographics, health, receipt of preventive health services, and utilization of health care. Descriptive statistics were used to describe data. RESULTS: More than one-third of respondents reported that their health was fair or poor, whereas one-quarter were very concerned with their health. Most participants (59%) reported at least one chronic health condition; nearly 1 in 5 reported two or more conditions. Less than half of respondents had received a routine medical examination in the past year. Vaccine uptake was low; 56% received the coronavirus disease 2019 vaccine and 36% received the annual influenza vaccine. CONCLUSIONS: Women in treatment for OUD could benefit from enhanced health care to address the high rates of chronic diseases and risk factors and underutilization of recommended preventive health services. Interventions and models of care that aim to enhance utilization of such services, and ultimately improve the health of this vulnerable population, may be worth exploring

Acquisition of a Distributed Computation and Immersive Visualization Environment for Complex Systems - Scientific Applications on Arrays of Multiprocessors (SCAAMP)

NSF Award ID: CDA-9601632 9/15/1996-8/31/199