The Long-Baseline Neutrino Experiment: Exploring Fundamental Symmetries of the Universe

The preponderance of matter over antimatter in the early Universe, the dynamics of the supernova bursts that produced the heavy elements necessary for life and whether protons eventually decay --- these mysteries at the forefront of particle physics and astrophysics are key to understanding the early evolution of our Universe, its current state and its eventual fate. The Long-Baseline Neutrino Experiment (LBNE) represents an extensively developed plan for a world-class experiment dedicated to addressing these questions. LBNE is conceived around three central components: (1) a new, high-intensity neutrino source generated from a megawatt-class proton accelerator at Fermi National Accelerator Laboratory, (2) a near neutrino detector just downstream of the source, and (3) a massive liquid argon time-projection chamber deployed as a far detector deep underground at the Sanford Underground Research Facility. This facility, located at the site of the former Homestake Mine in Lead, South Dakota, is approximately 1,300 km from the neutrino source at Fermilab -- a distance (baseline) that delivers optimal sensitivity to neutrino charge-parity symmetry violation and mass ordering effects. This ambitious yet cost-effective design incorporates scalability and flexibility and can accommodate a variety of upgrades and contributions. With its exceptional combination of experimental configuration, technical capabilities, and potential for transformative discoveries, LBNE promises to be a vital facility for the field of particle physics worldwide, providing physicists from around the globe with opportunities to collaborate in a twenty to thirty year program of exciting science. In this document we provide a comprehensive overview of LBNE's scientific objectives, its place in the landscape of neutrino physics worldwide, the technologies it will incorporate and the capabilities it will possess.Comment: Major update of previous version. This is the reference document for LBNE science program and current status. Chapters 1, 3, and 9 provide a comprehensive overview of LBNE's scientific objectives, its place in the landscape of neutrino physics worldwide, the technologies it will incorporate and the capabilities it will possess. 288 pages, 116 figure

Towards a Conceptual Framework Supporting Model Compilability

Abstract: The ever-growing use of modeling languages today is largely due to a maturation of model-based development technologies. However, there is enough room for improving language specifications and consequently, the efficiency of their usage. The state of facts in specifying Well Formedness Rules is among the most important issues calling for improvements. Despite the fact that various papers have approached it, the topic is still open. To solve it, there is the need of a rigorous conceptual framework supporting the specification of modeling languages ’ static semantics. This would stand as a basis for ensuring model compilability, a mandatory requirement in a model-driven context. Through this paper, we aim at providing core ideas that would contribute to the creation of such a framework. Our approach is testing-oriented and promotes the use of OCL specification patterns

Re-engineering Eclipse MDT/OCL for Xtext

Abstract: The current tooling used for the Eclipse OCL project uses an LALR parser generator. Enhancing the tooling to support editing motivated a migration to exploit the inherently model-driven characteristics of Xtext. This paper summarizes the experiences of that migration, identifies the many benefits and discusses a few changes in implementation approach that were required. Objective performance and size comparisons between the old LALR and new Xtext approach are provided

Extending OCL Operation Contracts with Objective Functions

Abstract: We explore the potential of adding objective functions to OCL operation contracts. If an operation contract includes an objective function, the operation has the obligation to yield results that make the objective function assume an optimal value. Thus, an objective function expresses a preference among the possible operation results that conform to the postconditions of the operation contract and any class invariants. Objective functions strictly increase the expressiveness of OCL operation contracts. While objective functions arise naturally in application domains like operations research, we argue that objective functions are a useful general-purpose specification instrument and discuss several application examples. As tool support for operation contracts with objective functions, we present an animator for OCL operation contracts with optimization capabilities. We ensure tool interoperability by specifying objective functions in a UML profile

MySQL4OCL: A Stored Procedure-Based MySQL Code Generator for OCL

Abstract: In this paper we introduce a MySQL code generator for a significant subset of OCL expressions which is based on the use of stored procedures for mapping OCL iterators. Our code generator is defined recursively over the structure of OCL expressions. We discuss the class of OCL expressions covered by our definition (which includes, possibly nested, iterator expressions) as well as some extensions needed to cover the full OCL language. We also discuss the efficiency of the MySQL code produced by our code generator, and compare it with previous known results on evaluating OCL expressions on medium-large scenarios. We have implemented our code generator in the MySQL4OCL tool