Editorial

Welcome to the December/ January edition of THE Queensland Surveyor. This edition includes material from the 2001 SBQ/ISAQ annual certificate presentation ceremony and as such is a few weeks late in getting to you, thus the titling date December/January editio

GR16: Quantum General Relativity

This is the report of the "Quantum General Relativity" session, at the 16th International Conference on General Relativity & Gravitation, held on July 15th to 21st 2001, in Durban, South Africa. The report will appear on the Proceedings of the conference. Comments and criticisms are welcome: they will be taken into account for revising the text before the publication.Comment: 7 pages, no figure

The Review - Fall 2001

IN THIS ISSUE 1 - Message From The Dean 2 - A Special Welcome for Alumni Babies 2 - A Very Special Offer for Our Alumni 3 - Farewell to Joann Ludwig 4 - The Admissions-Alumni Partnership 5 - JAVA is Brewing at Jefferson! 6 - What A Year! 8 - Alumni Update 10 - Alumni News Form 11 - Visiting Scholar 2001: A Nurse Alumna Sets the Agenda 12 - Michael Hartman Elected New CHP Alumni President 13 - Commencement 200

The Review - Fall 2001

IN THIS ISSUE 1 - Message From The Dean 2 - A Special Welcome for Alumni Babies 2 - A Very Special Offer for Our Alumni 3 - Farewell to Joann Ludwig 4 - The Admissions-Alumni Partnership 5 - JAVA is Brewing at Jefferson! 6 - What A Year! 8 - Alumni Update 10 - Alumni News Form 11 - Visiting Scholar 2001: A Nurse Alumna Sets the Agenda 12 - Michael Hartman Elected New CHP Alumni President 13 - Commencement 200

Robust creation of entanglement between remote memory qubits

In this Letter we propose a robust quantum repeater architecture building on the original DLCZ protocol [L.M. Duan \textit{et al.}, Nature \textbf{414}, 413 (2001)]. The architecture is based on two-photon Hong-Ou-Mandel-type interference which relaxes the long distance stability requirements by about 7 orders of magnitude, from sub wavelength for the single photon interference required by DLCZ to the coherence length of the photons. Our proposal provides an exciting possibility for robust and realistic long distance quantum communication.Comment: Comments are welcome, to appear in Phys. Rev. Lett., accepted versio

12th International Workshop on Termination (WST 2012) : WST 2012, February 19–23, 2012, Obergurgl, Austria / ed. by Georg Moser

This volume contains the proceedings of the 12th International Workshop on Termination (WST 2012), to be held February 19–23, 2012 in Obergurgl, Austria. The goal of the Workshop on Termination is to be a venue for presentation and discussion of all topics in and around termination. In this way, the workshop tries to bridge the gaps between different communities interested and active in research in and around termination. The 12th International Workshop on Termination in Obergurgl continues the successful workshops held in St. Andrews (1993), La Bresse (1995), Ede (1997), Dagstuhl (1999), Utrecht (2001), Valencia (2003), Aachen (2004), Seattle (2006), Paris (2007), Leipzig (2009), and Edinburgh (2010). The 12th International Workshop on Termination did welcome contributions on all aspects of termination and complexity analysis. Contributions from the imperative, constraint, functional, and logic programming communities, and papers investigating applications of complexity or termination (for example in program transformation or theorem proving) were particularly welcome. We did receive 18 submissions which all were accepted. Each paper was assigned two reviewers. In addition to these 18 contributed talks, WST 2012, hosts three invited talks by Alexander Krauss, Martin Hofmann, and Fausto Spoto

Fault-tolerant quantum repeater with atomic ensembles and linear optics

We present a detailed analysis of a new robust quantum repeater architecture building on the original DLCZ protocol [L.M. Duan \textit{et al.}, Nature (London) \textbf{414}, 413 (2001)]. The new architecture is based on two-photon Hong-Ou-Mandel-type interference which relaxes the long-distance interferometric stability requirements by about 7 orders of magnitude, from sub-wavelength for the single photon interference required by DLCZ to the coherence length of the photons, thereby removing the weakest point in the DLCZ schema. Our proposal provides an exciting possibility for robust and realistic long-distance quantum communication.Comment: Comments are welcome, to appear in Phys. Rev. A, accepted versio

Welcome to the Dark Side - Hedge Fund Attrition and Survivorship Bias over the period 1994-2001

Hedge funds exhibit a high rate of attrition that has increased substantially over time. Using data over the period 1994-2001, we show that lack of size, lack of performance and an increasingly aggressive attitude of old and new fund managers alike are the main factors behind this. Although attrition is high, survivorship bias in hedge fund data is quite modest, which reflects the relatively small difference in performance between surviving and defunct funds. Concentrating on survivors only will overestimate the average hedge fund return by around 2% per annum. For small, young, and leveraged funds, however, the bias can be as high as 4-6%. We also find significant survivorship bias in estimates of the standard deviation, skewness and kurtosis of individual hedge fund returns. When not corrected for, this will lead investors to seriously overestimate the benefits of hedge funds. We find fund of funds attrition to be much lower than for hedge funds. Combined with a small difference in performance between surviving and defunct funds of funds, this yields relatively low survivorship bias estimates for funds of funds.

From the help desk

Welcome to From the help desk. From the help desk is written by the people in Technical Services at StataCorp and deals with issues that they have found to be of concern to a large fraction of Stata users. It is the rare column in this series that deals with sophisticated programming issues because such issues, by definition, are not of concern to a large fraction of Stata users. From the help desk discusses the use of sophisticated programs and the use of sophisticated statistics. Copyright 2001 by Stata Corporation.internet, web, ado-files, Stata executable installation, updates, downloading, user-written additions, packages, search, find