Exile Vol. X No. 2

FICTION The Fragile Colour of Eyes by Susan Brady 6-17 The Trickster by Ed Brunner 19-26 On Passing by Sharon Haddock 32-42 POETRY Fishing with Light Tackle by Robert Hoyt 18 Poem by Sharon Haddock 27 On Insects by Robert Hoyt 28 A Chopper of Trees by Jerry Bryce 29 Nefertiti by Peggy Schmidt 31 The Gambler and the Corinthian by Robert Chester 42 Shades of Spring by Jane Cogie 43 GRAPHICS Monocut by Carol Kubie 5 Monocut by Parker Waite 18 Monocut by Doris Farrington 27 Watercolor by Kathy Koenig 31 Pen and Ink by Karen Gernenz 43 Awarded the semi-annual EXILE-Denison Bookstore Writing Prize: The Fragile Colour of Eyes by Susan Brady 6-17 Page numbers in the published table of contents are off by one. Page numbers given indicate where the works actually appear in the issue

Partitioning climate projection uncertainty with multiple large ensembles and CMIP5/6

Partitioning uncertainty in projections of future climate change into contributions from internal variability, model response uncertainty and emissions scenarios has historically relied on making assumptions about forced changes in the mean and variability. With the advent of multiple single-model initial-condition large ensembles (SMILEs), these assumptions can be scrutinized, as they allow a more robust separation between sources of uncertainty. Here, the framework from Hawkins and Sutton (2009) for uncertainty partitioning is revisited for temperature and precipitation projections using seven SMILEs and the Coupled Model Intercomparison Project CMIP5 and CMIP6 archives. The original approach is shown to work well at global scales (potential method bias < 20 %), while at local to regional scales such as British Isles temperature or Sahel precipitation, there is a notable potential method bias (up to 50 %), and more accurate partitioning of uncertainty is achieved through the use of SMILEs. Whenever internal variability and forced changes therein are important, the need to evaluate and improve the representation of variability in models is evident. The available SMILEs are shown to be a good representation of the CMIP5 model diversity in many situations, making them a useful tool for interpreting CMIP5. CMIP6 often shows larger absolute and relative model uncertainty than CMIP5, although part of this difference can be reconciled with the higher average transient climate response in CMIP6. This study demonstrates the added value of a collection of SMILEs for quantifying and diagnosing uncertainty in climate projections

Exile Vol. XI No. 1

FICTION By the Fire of the Chief by Peggy Schmidt 9-17 From the Diary of a Vanishing Man by Ed Brunner 19-29 Dialogue by Ken Booth 35-37 POETRY Johnny Joe by Bill West 6-7 Caterpillar by Barb Bergantz 17 Poem by Bonnie McCarthy 29 The Queen by Hugh Wilder 31 The Clown by Barb Bergantz 32 Poem by Gretchen Schenck 33 Treatise on Cosmology by P. M. Grout 37 Stimulus by Susan Sherwood 37 Depot by Susan Sherwood 39 GRAPHICS Pen and Ink by Dave Goodwin 7 Pen and Ink by Ramona Gibbs 8 Pen and Ink by Tod Riddell 18 Charcoal by Dave Goodwin 30 Woodcut by Parker Waite III 34 Woodcut by Lela Giles 3

Exile Vol. X No. 1

FICTION The Contest by Jon Reynolds 7-19 Engagement by John Hunting 23-34 Sea Scape by Ellen Heath 35-37 The Gift of the Pelican Keeper by Bart Estes 38-43 Trillium of Guilt by David Kay 46-50 The Enormous Snowfall by Ed Brunner 52-65 Story by Jane Cogie 66-67 POETRY Karen\u27s Elegy by Al Werder 20-21 Chicken Little by Curt Matthews 34 Autumn by Judy Pister 37 Poem by Curt Matthews 44 Madame Bovary by Al Werder 65 GRAPHICS Monoprint by Kathy Knapp 5 Pen and Ink by Bob Tauber 6 Linocut by Parker Waite III 22 Linocut by Jeff Barnes 38 Linocut by Jack Reilly 43 Water color by Kathy Knapp 45 Linocut by Bob Tauber 51 Awarded the semi-annual EXILE-Denison Bookstore Writing Prize: The Gift of the Pelican Keeper by Bart Estes 38-4

Avalanche amplification of a single exciton in a semiconductor nanowire

Interfacing single photons and electrons is a crucial ingredient for sharing quantum information between remote solid-state qubits. Semiconductor nanowires offer the unique possibility to combine optical quantum dots with avalanche photodiodes, thus enabling the conversion of an incoming single photon into a macroscopic current for efficient electrical detection. Currently, millions of excitation events are required to perform electrical read-out of an exciton qubit state. Here we demonstrate multiplication of carriers from only a single exciton generated in a quantum dot after tunneling into a nanowire avalanche photodiode. Due to the large amplification of both electrons and holes (> 10^4), we reduce by four orders of magnitude the number of excitation events required to electrically detect a single exciton generated in a quantum dot. This work represents a significant step towards single-shot electrical read-out and offers a new functionality for on-chip quantum information circuits

Ultrafast optical control of entanglement between two quantum dot spins

The interaction between two quantum bits enables entanglement, the two-particle correlations that are at the heart of quantum information science. In semiconductor quantum dots much work has focused on demonstrating single spin qubit control using optical techniques. However, optical control of entanglement of two spin qubits remains a major challenge for scaling from a single qubit to a full-fledged quantum information platform. Here, we combine advances in vertically-stacked quantum dots with ultrafast laser techniques to achieve optical control of the entangled state of two electron spins. Each electron is in a separate InAs quantum dot, and the spins interact through tunneling, where the tunneling rate determines how rapidly entangling operations can be performed. The two-qubit gate speeds achieved here are over an order of magnitude faster than in other systems. These results demonstrate the viability and advantages of optically controlled quantum dot spins for multi-qubit systems.Comment: 24 pages, 5 figure

Down selecting adjuvanted vaccine formulations: a comparative method for harmonized evaluation.

The need for rapid and accurate comparison of panels of adjuvanted vaccine formulations and subsequent rational down selection, presents several challenges for modern vaccine development. Here we describe a method which may enable vaccine and adjuvant developers to compare antigen/adjuvant combinations in a harmonized fashion. Three reference antigens: Plasmodium falciparum apical membrane antigen 1 (AMA1), hepatitis B virus surface antigen (HBsAg), and Mycobacterium tuberculosis antigen 85A (Ag85A), were selected as model antigens and were each formulated with three adjuvants: aluminium oxyhydroxide, squalene-in-water emulsion, and a liposome formulation mixed with the purified saponin fraction QS21. The nine antigen/adjuvant formulations were assessed for stability and immunogenicity in mice in order to provide benchmarks against which other formulations could be compared, in order to assist subsequent down selection of adjuvanted vaccines. Furthermore, mouse cellular immune responses were analyzed by measuring IFN-γ and IL-5 production in splenocytes by ELISPOT, and humoral responses were determined by antigen-specific ELISA, where levels of total IgG, IgG1, IgG2b and IgG2c in serum samples were determined. The reference antigens and adjuvants described in this study, which span a spectrum of immune responses, are of potential use as tools to act as points of reference in vaccine development studies. The harmonized methodology described herein may be used as a tool for adjuvant/antigen comparison studies

Sloan Digital Sky Survey Imaging of Low Galactic Latitude Fields: Technical Summary and Data Release

The Sloan Digital Sky Survey (SDSS) mosaic camera and telescope have obtained five-band optical-wavelength imaging near the Galactic plane outside of the nominal survey boundaries. These additional data were obtained during commissioning and subsequent testing of the SDSS observing system, and they provide unique wide-area imaging data in regions of high obscuration and star formation, including numerous young stellar objects, Herbig-Haro objects and young star clusters. Because these data are outside the Survey regions in the Galactic caps, they are not part of the standard SDSS data releases. This paper presents imaging data for 832 square degrees of sky (including repeats), in the star-forming regions of Orion, Taurus, and Cygnus. About 470 square degrees are now released to the public, with the remainder to follow at the time of SDSS Data Release 4. The public data in Orion include the star-forming region NGC 2068/NGC 2071/HH24 and a large part of Barnard's loop.Comment: 31 pages, 9 figures (3 missing to save space), accepted by AJ, in press, see http://photo.astro.princeton.edu/oriondatarelease for data and paper with all figure

Optical control of one and two hole spins in interacting quantum dots

A single hole spin in a semiconductor quantum dot has emerged as a quantum bit that is potentially superior to an electron spin. A key feature of holes is that they have a greatly reduced hyperfine interaction with nuclear spins, which is one of the biggest difficulties in working with an electron spin. It is now essential to show that holes are viable for quantum information processing by demonstrating fast quantum gates and scalability. To this end we have developed InAs/GaAs quantum dots coupled through coherent tunneling and charged with controlled numbers of holes. We report fast, single qubit gates using a sequence of short laser pulses. We then take the important next step toward scalability of quantum information by optically controlling two interacting hole spins in separate dots.Comment: 5 figure