Remote State Preparation

Quantum teleportation uses prior entanglement and forward classical communication to transmit one instance of an unknown quantum state. Remote state preparation (RSP) has the same goal, but the sender knows classically what state is to be transmitted. We show that the asymptotic classical communication cost of RSP is one bit per qubit - half that of teleportation - and becomes even less when transmitting part of a known entangled state. We explore the tradeoff between entanglement and classical communication required for RSP, and discuss RSP capacities of general quantum channels.Comment: 4 pages including 1 epsf figure; v3 has an additional author and discusses relation to work of Devetak and Berger (quant-ph/0102123); v4 improves low-entanglement protocols without back communication to perform as well as low-entanglement protocols with back communication; v5 (journal version) has a few small change

REGIONAL ECONOMIC IMPACTS OF A WATERSHED PLANNING PROCESS TO REDUCE EROSION AND STREAM SEDIMENTATION

Farm-level and watershed-wide land-use changes resulting from policy initiatives are linked to a regional input/output model. As a result not only can the direct economic impacts at the farm and watershed levels be determined, so too can the direct and induced economic impacts at the regional level.Resource /Energy Economics and Policy,

Book Reviews

Reviews of the following books: History of Belfast in the 20th Century: by Jay David and Tim Hughes, with Megan Pinette; At Home With The General: A Visit to the Joshua L. Chamberlain Museum by Allan M. Levinsky; “Do Your Job!” An Illustrated Bicentennial History of the Portsmouth Naval Shipyard, 1800-2000 by Richard E. Winslow, III; Super U: The History and Politics of the University of Maine System by James Libb

Poster Abstract: Crane Charades: Behavior Identification via Backpack Mounted Sensor Platforms

The Whooping Crane is an endangered species native to North America and there are approximately 575 in existence. There have been recent efforts to provide ecologists with a tool to study the multifaceted behavior of the endangered species. Like many species, cranes display distinctly identifiable movements while being threatened, acting territorial, migrating, or preening. The preliminary experiments described in this poster provide evidence that sensor data presented by a novel sensing platform, the CraneTracker, can be used to identify crane behaviors on-board. With the ability to identify these behaviors, ecologists will have a more granular insight on what occurs during a crane’s life on a daily basis

Incidence of proteinuria in type 2 diabetes mellitus in the Pima Indians

Incidence of proteinuria in type 2 diabetes mellitus in the Pima Indians. Little is known of the natural history of nephropathy in type 2 (non-insulin-dependent) diabetes, yet type 2 diabetes is a major cause of end-stage renal disease in the United States. The incidence rate of heavy proteinuria was determined in Pima Indians participating in a longitudinal population study of diabetes and its complications. Heavy proteinuria was defined by a urine protein (g/liter) to urine creatinine (g/liter) ratio ≥ 1.0 (≥ 113mg protein/mmol creatinine), a level which corresponds to a urine protein excretion rate of about 1 g/day. The incidence rates of proteinuria in diabetic Pimas were 4, 12, 37, and 106 cases/1,000 person-years at risk in the periods 0 to 5, 5 to 10, 10 to 15, and 15 to 20 years after the diagnosis of diabetes. The cumulative incidence rates were 2%, 8%, 23%, and 50% at 5, 10, 15, and 20 years, respectively. The duration of diabetes, severity of diabetes as determined by the degree of hyperglycemia and type of treatment, and blood pressure were risk factors for proteinuria. The presence of heavy proteinuria was strongly associated with the development of renal insufficiency, defined by serum creatinine ≥ 2.0 mg/dl (≥ 177 µmol/liter). The incidence of proteinuria in type 2 diabetes in Pima Indians was as high as that reported in type 1 diabetes in other populations and represents a frequent, serious complication of the disease

Poster Abstract: Crane Charades: Behavior Identification via Backpack Mounted Sensor Platforms

The Whooping Crane is an endangered species native to North America and there are approximately 575 in existence. There have been recent efforts to provide ecologists with a tool to study the multifaceted behavior of the endangered species. Like many species, cranes display distinctly identifiable movements while being threatened, acting territorial, migrating, or preening. The preliminary experiments described in this poster provide evidence that sensor data presented by a novel sensing platform, the CraneTracker, can be used to identify crane behaviors on-board. With the ability to identify these behaviors, ecologists will have a more granular insight on what occurs during a crane’s life on a daily basis

Descriptive Analysis of Healthcare-Associated Infections Other than Bloodstream, Respiratory, Urinary Tract, or Surgical Site Infections, 2001–2011

It is estimated that healthcare-associated infections (HAIs) account for approximately 1.7 million infections and 99,000 deaths in US hospitals each year. The Centers for Disease Control and Prevention (CDC) and the National Healthcare Safety Network (NHSN) have developed standardized surveillance definitions of HAIs including surgical site infection (SSI), pneumonia, bloodstream infection (BSI), and urinary tract infection (UTI).2 All HAIs except for these "big four" infection types are categorized as "other" types of HAI. Of the estimated numbers of total HAIs (1,195,142) and deaths associated with HAI (98,987) in US hospitals among adults and children outside of intensive care units (ICUs), other types of HAI accounted for 22% (263,810) and 11% (11,062) of deaths, respectively, which suggests that other HAIs represent a substantial burden in US healthcare facilities

Book Reviews

Reviews of the following books: Hardliners: A History of the Emery-Waterhouse Company by Edgar Allen Beem and Charles L. Hildreth, Jr.; L.L. Bean: The Making of an American Icon by Leon Gorman; Eminent Mainers: Succinct Biographies of Thousands of Amazing Mainers, Mostly Dead and a Few People from Away Who Have Done Something Useful Within the State Maine; Compiled by Arthur Douglas Stover and Maine: Downeast and Different: An Illustrated History by Neil Rolde; ; The Rangeley and Its Region: The Famous Boat and Lakes of Western Maine by Stephen A. Cole; Voyages: A Maine Franco-American Reader, edited by Nelson Madore and Barry Rodrigu

Mixed State Entanglement and Quantum Error Correction

Entanglement purification protocols (EPP) and quantum error-correcting codes (QECC) provide two ways of protecting quantum states from interaction with the environment. In an EPP, perfectly entangled pure states are extracted, with some yield D, from a mixed state M shared by two parties; with a QECC, an arbi- trary quantum state $|\xi\rangle$ can be transmitted at some rate Q through a noisy channel $\chi$ without degradation. We prove that an EPP involving one- way classical communication and acting on mixed state $\hat{M}(\chi)$ (obtained by sharing halves of EPR pairs through a channel $\chi$) yields a QECC on $\chi$ with rate $Q=D$, and vice versa. We compare the amount of entanglement E(M) required to prepare a mixed state M by local actions with the amounts $D_1(M)$ and $D_2(M)$ that can be locally distilled from it by EPPs using one- and two-way classical communication respectively, and give an exact expression for $E(M)$ when $M$ is Bell-diagonal. While EPPs require classical communica- tion, QECCs do not, and we prove Q is not increased by adding one-way classical communication. However, both D and Q can be increased by adding two-way com- munication. We show that certain noisy quantum channels, for example a 50% depolarizing channel, can be used for reliable transmission of quantum states if two-way communication is available, but cannot be used if only one-way com- munication is available. We exhibit a family of codes based on universal hash- ing able toachieve an asymptotic $Q$ (or $D$) of 1-S for simple noise models, where S is the error entropy. We also obtain a specific, simple 5-bit single- error-correcting quantum block code. We prove that {\em iff} a QECC results in high fidelity for the case of no error the QECC can be recast into a form where the encoder is the matrix inverse of the decoder.Comment: Resubmission with various corrections and expansions. See also http://vesta.physics.ucla.edu/~smolin/ for related papers and information. 82 pages latex including 19 postscript figures included using psfig macro