Disentanglement and decoherence in a pair of qutrits under dephasing noise

We relate disentanglement and decoherence rates in a pair of three-level atoms subjected to multi-local and collective pure dephasing noise acting in a preferred basis. The bipartite entanglement decay rate, as bounded from above by the negativity, is found to be greater than or equal to the dephasing-decoherence rates characterized by the decay of off-diagonal elements in the corresponding full density matrix describing the system or the reduced density matrix describing either qutrit, extending previous results for qubit pairs subject to such noise.Comment: 9 pages, submitted to J. Mod. Opt. 01/21/07, accepted 08/14/07 Version 2 corrections: 1) E and D operators in second-to-last paragraph of Sec. 2. 2) matrix elements (8,6) and (9,1) in Eq.

Local-dephasing-induced entanglement sudden death in two-component finite-dimensional systems

Entanglement sudden death (ESD), the complete loss of entanglement in finite time, is demonstrated to occur in a class of bipartite states of qu-d-it pairs of any finite dimension d > 2, when prepared in so-called `isotropic states' and subject to multi-local dephasing noise alone. This extends previous results for qubit pairs [T. Yu, J. H. Eberly, Phys. Rev. Lett. 97, 140403 (2006)] to all qu-d-it pairs with d > 2.Comment: 8 pages, to appear in Phys. Rev.

The language socialization paradigm for SLA: What's in it for you?

Watson-Gegeo (2001) tells us that we are “at the beginning of a paradigm shift in the human and social sciences” that is “fundamentally transforming second language acquisition (SLA) and educational theory and research” (p. 1). Watson-Gegeo is not very forthcoming as to the nature of either the old paradigm or the new one; and indeed, one of the problems with her paper is the absence of anything that could be called evidence. Still, based on what she sees as this emerging new paradigm, she is explicit in arguing that we need a new paradigm for SLA, what she calls the “language socialization paradigm”. I propose to look at the new cognitive science as Watson-Gegeo conceives it, and at her proposals for SLA research. It will be seen that her account of the former is generally vacuous or irrelevant where it is not simply incorrect, while the latter show little promise for a productive research program for SLA

Building the Faith: Strategies for Building the Capacity of Faith-Based Organizations and Congregations Serving Allegheny County, Pennsylvania

For as long as anyone can remember, congregations have played a vital role in nurturing the spirit of the community. Aside from being a source for spiritual grounding, congregations also provide social ministries to address the needs of the community. Over time, these social ministries have developed into more formal and professional faith-based programs and organizations, which often function independently from those offered by their founding congregations. Such national organizations as Catholic Charities, Young Men's Christian Association and the United Jewish Federation, and such local organizations as Holy Family Institute, Pittsburgh Project, the Jewish Community Center and East End Cooperative Ministries, have emerged from congregations as ways to respond to the social needs of the community. While faith-based organizations (FBOs) have played important roles in their communities for many years, the issue of public funding for their efforts has become the subject of extensive public debate relatively recently. The current national dialogue can be traced back to 1996 and the Clinton administration's support for changes to what has been called "charitable choice" legislation: making federal contracts more readily available to support the work of congregations and FBOs. Subsequently, in 2001, the Bush administration established the Office of Faith-Based and Community Initiatives as a way to further address the needs of FBOs. Despite the great variety of beliefs represented by FBOs, they share some important characteristics: a broad commitment to community; support for spiritual growth and social justice; and a willingness to serve in areas of great need. These characteristics were confirmed by a recent survey of incorporated 501(c)(3) faith-based organizations carried out by a team of researchers led by Dr. Kevin Kearns, Associate Professor at the University of Pittsburgh. For example, the team found that when compared to their secular counterparts, FBOs benefit from much higher levels of commitment from volunteers, and this commitment does not abate as the organizations grow larger and gain more professional staff. In recent years, government at all levels has come to rely on FBOs to deliver services to populations in need. Annually, FBOs in the United States provide more than $15 billion in social and human services, serving approximately 70 million persons. In some communities, government contracts with FBOs have increased more than 500$125 million. (Nine states were studied in the year 2000 and an additional six in 2002.)This study also found that government contracting with FBOs in eight of nine originally surveyed states increased substantially, from over $7.5 million in 2000 to over$88 million in 2002

Disentanglement and decoherence in two-spin and three-spin systems under dephasing

We compare disentanglement and decoherence rates within two-spin and three-spin entangled systems subjected to all possible combinations of local and collective pure dephasing noise combinations. In all cases, the bipartite entanglement decay rate is found to be greater than or equal to the dephasing-decoherence rates and often significantly greater. This sharpens previous results for two-spin systems [T. Yu and J. H. Eberly Phys. Rev. B 68, 165322 (2003)] and extends them to the three-spin context.Comment: 17 page

Optimizations for a Java Interpreter Using Instruction Set Enhancement

Several methods for optimizing Java interpreters have been proposed that involve augmenting the existing instruction set. In this paper we describe the design and implementation of three such optimizations for an efficient Java interpreter. Specialized instructions are new versions of existing instructions with commonly occurring operands hardwired into them, which reduces operand fetching. Superinstructions are new Java instructions which perform the work of common sequences of instructions. Finally, instruction replication is the duplication of existing instructions with a view to improving branch prediction accuracy. We describe our basic interpreter, the interpreter generator we use to automatically create optimised source code for enhanced instructions, and discuss Java specific issues relating to these optimizations. Experimental results show significant speedups (up to a factor of 3.3, and realistic average speedups of 30%-35%) are attainable using these techniques

iGrow Wheat: Best Management Practices for Wheat Production

https://openprairie.sdstate.edu/plant_book/1000/thumbnail.jp

Towards Superinstructions for Java Interpreters

The Java Virtual Machine (JVM) is usually implemented by an interpreter or just-in-time (JIT) compiler. JITs provide the best performance, but interpreters have a number of advantages that make them attractive, especially for embedded systems. These advantages include simplicity, portability and lower memory requirements. Instruction dispatch is responsible for most of the running time of efficient interpreters, especially on pipelined processors. Superinstructions are an important optimisation to reduce the number of instruction dispatches. A superinstruction is a new Java instruction which performs the work of a common sequence of instructions. In this paper we describe work in progress on the design and implementation of a system of superinstructions for an efficient Java interpreter for connected devices and embedded systems. We describe our basic interpreter, the interpreter generator we use to automatically create optimised source code for superinstructions, and discuss Java specific issues relating to superinstructions. Our initial experimental results show that superinstructions can give large speedups on the SPECjvm98 benchmark suite

Tackling Jim Crow: Segregation on the College Gridiron Between 1936-1941

Thesis advisor: James O'TooleThis thesis examines the extent of Jim Crow segregation in college football in the era immediately preceding World War II by focusing on three black stars: Wilmeth Sidat-Singh of Syracuse, Lou Montgomery of Boston College, and Leonard Bates of New York University. Sidat-Singh was passed off by Syracuse as a Hindu before his real ethnicity was revealed. Montgomery was benched by his Catholic university on six separate occasions, including two bowl games. Bates was the beneficiary of a massive student protest for his inclusion, but ultimately was benched by the supposedly liberal NYU. These benchings of northern players against southern teams shows the degrees the south went to in order to impose segregation on every level of society. Perhaps more importantly it shows how willing northern schools were to acquiesce to these southern demands in favor of expediency.Thesis (BA) — Boston College, 2005.Submitted to: Boston College. College of Arts and Sciences.Discipline: History.Discipline: College Honors Program