This work highlights and takes aim at the most critical security aspects required for two different types of distributed systems for scientific computation. It covers two open-source systems written in Java: a demand-driven system - general intensional programming system (GIPSY) and a pipelined system - distributed modular audio recognition framework (DMARF), which are the distributed scientific computational engines used as case studies with respect to the security aspects. More specific goals include data/demand integrity, data/demand origin authentication, confidentiality, high availability, and malicious code detection. We address some of the goals to a degree, some with the Java data security framework (JDSF) as a work-in- progress.

We present advances in the software engineering design and implementation of the multi-tier run-time system for the General Intensional Programming System (GIPSY) by further unifying the distributed technologies used to implement the Demand Migration Framework (DMF) in order to streamline distributed execution of hybrid intensional-imperative programs using Java.

GIPSY is a platform providing a framework for the compilation and execution of programs written in intensional programming languages of the Lucid family. While maintaining its use of intensionality, over the years, Lucid constantly underwent changes in its syntax, and its semantics is getting more and more generalized. Throughout this hectic evolution of the language, various systems for the evaluation of Lucid programs were developed. Due to lack of ability to adapt to the syntax and semantic changes of the language, all of them met with doom as new evolutions of the language were proposed. Set in this evolutionary aspect of Lucid, GIPSY aims at easing the development of the Lucid family of intensional programming languages by providing a common system into which variants of Lucid can be compiled and executed and, more interestingly, developed in the future. One of the latest evolutions of Lucid is the language Lucx, permitting the explicit use of contexts as first-class atomic entities. This paper presents the integration of Lucx's context calculus into GIPSY. We define the notion of context according to Lucx, its syntax and semantics, as well as operators on such contexts. We then present how context entities have been abstracted into implementation classes and embedded into GIPSY.

MARF is an open-source research platform and a collection of voice/sound/speech/text and natural language processing (NLP) algorithms written in Java and arranged into a modular and extensible framework facilitating addition of new algorithms. MARF can run distributively over the network and may act as a library in applications or be used as a source for learning and extension. A few example applications are provided to show how to use the framework. There is an API reference in the Javadoc format as well as this set of accompanying notes with the detailed description of the architectural design, algorithms, and applications. MARF and its applications are released under a BSD-style license and is hosted at SourceForge.net. This document provides the details and the insight on the internals of MARF and some of the mentioned applications.Comment: v2: add missing .ind file for index; 224 pages, 40 figures, 19 tables; index. A comprehensive description of AI and PR algorithms and data structures, software engineering design and implementation, and experiments. Source revision is maintained in the CVS at http://marf.sf.ne

The General Intensional Programming System (GIPSY) has been built around the Lucid family of intensional programming languages that rely on the higher-order intensional logic (HOIL) to provide context-oriented multidimensional reasoning of intensional expressions. HOIL combines functional programming with various intensional logics to allow explicit context expressions to be evaluated as first-class values that can be passed as parameters to functions and return as results with an appropriate set of operators defined on contexts. GIPSY's frameworks are implemented in Java as a collection of replaceable components for the compilers of various Lucid dialects and the demand-driven eductive evaluation engine that can run distributively. GIPSY provides support for hybrid programming models that couple intensional and imperative languages for a variety of needs. Explicit context expressions limit the scope of evaluation of math expressions (effectively a Lucid program is a mathematics or physics expression constrained by the context) in tensor physics, regular math in multiple dimensions, etc., and for cyberforensic reasoning as one of the use-cases of interest. Thus, GIPSY is a support testbed for HOIL-based languages some of which enable such reasoning, as in formal cyberforensic case analysis with event reconstruction. In this paper we discuss the GIPSY architecture, its evaluation engine and example use-cases.