Experimentally exploring compressed sensing quantum tomography

In the light of the progress in quantum technologies, the task of verifying the correct functioning of processes and obtaining accurate tomographic information about quantum states becomes increasingly important. Compressed sensing, a machinery derived from the theory of signal processing, has emerged as a feasible tool to perform robust and significantly more resource-economical quantum state tomography for intermediate-sized quantum systems. In this work, we provide a comprehensive analysis of compressed sensing tomography in the regime in which tomographically complete data is available with reliable statistics from experimental observations of a multi-mode photonic architecture. Due to the fact that the data is known with high statistical significance, we are in a position to systematically explore the quality of reconstruction depending on the number of employed measurement settings, randomly selected from the complete set of data, and on different model assumptions. We present and test a complete prescription to perform efficient compressed sensing and are able to reliably use notions of model selection and cross-validation to account for experimental imperfections and finite counting statistics. Thus, we establish compressed sensing as an effective tool for quantum state tomography, specifically suited for photonic systems.Comment: 12 pages, 5 figure

Perfluorinated Chemicals in Sediments, Lichens, and Seabirds from the Antarctic Peninsula — Environmental Assessment and Management Perspectives

Antarctica is one of the last frontiers of the planet to be investigated for the environmental transport and accumulation of persistent organic pollutants. Perfluorinated contaminants (PFCs) are a group of widely used anthropogenic substances, representing a significant risk to wildlife and humans due to their high biomagnification potential and toxicity risks, especially in food webs of the northern hemisphere and Arctic. Because the assessment of PFCs in the Antarctic continent is scarce, questions linger about the long-range transport and bioaccumulation capacity of PFCs in Antarctic food webs. To better understand the global environmental fate of PFCs, sediment, lichen (Usnea aurantiaco-atra), and seabird samples (southern giant petrel, Macronectes giganteus; gentoo penguin, Pygoscelis papua) were collected around the Antarctic Peninsula in 2009. PFC analytes were analyzed by LC/MS/MS, revealing the detection of PFHpA in seabirds’ feather and fecal samples, and PFHxS in lichens. PFBA and PFPeA were detected in 80% and 60% of the lichens, and PFTA in 60% of sediment samples. While oceanic currents and atmospheric transport of PFCs may explain the ubiquitous nature of these contaminants in the Antarctic Peninsula, military bases and research stations established there may also be contributing as secondary sources of PFCs in the Antarctic ecosystem

Reproduction, growth and exploitation rate of chiochio (Psectrogaster rutiloides) in the Ucayali river basin between 2008 to 2012

El chiochio (Psectrogaster rutiloides) es una las 10 especies más representativas en la pesca de la flota comercial de Pucallpa, Perú. Esta investigación tuvo el objetivo de generar información para la comprensión de su biología y pesquería. Se estudiaron los aspectos reproductivos (época de reproducción, talla de primera madurez [TPM], proporción sexual), relación Longitud-Peso, crecimiento y tasa de explotación del chiochio desembarcado en puertos de Pucallpa entre 2008 y 2012. Datos de distribución de frecuencia de tallas fueron utilizados para estimar la proporción de ejemplares desembarcados inferior a la TPM estimada. La información de 2011 fue utilizada para determinar los parámetros de crecimiento de la especie (Loe, K y t0), mortalidad natural (M) por pesca (F) y total (Z), y estimar la tasa de explotación (E). Los resultados indican que la especie desova durante el periodo de transición a creciente, alcanza la TPM al año de vida con 12.2 cm de longitud total (LT). En 4 de los 5 años analizados, la ecuación Longitud-Peso fue diferente en machos y hembras (p<0.05). Los parámetros de la ecuación de crecimiento de von Bertalanffy se definieron como Loe=22.58 cm, K=0.66 año-1, t0=-0.26 y las mortalidades M=1.45 año-1, F=1.73 año-1, Z=3.18 año-1. La tasa de explotación estimada fue E=0.54, que indica que chiochio se halla en fase de explotación óptima, pero requiere de acciones de control de tallas en los desembarques, debido a la presencia de reclutas.«Chiochio» (Psectrogaster rutiloides) is one of the 10 representative species in the catches of the commercial fleet of Pucallpa, Peru. The aim of this study was to generate information for the understanding of its biology and fishery. Reproductive aspects (time of reproduction, size at maturity [TPM], sex ratio), relationship Length-Weight, growth and rate of exploitation were studied in chiochio landed in Pucallpa ports between 2008 and 2012. Data of length frequency distribution were used to estimate the proportion of individuals below the estimated landed TPM. Also, information from 2011 was used to determine the growth parameters (Loe, K and t0), natural mortality (M) for fishing (F) and total (Z), and estimate the exploitation rate (E). The results showed that «chiochio» spawns during the transition to increasing, and reaches the TPM at 1 year of age with 12.2 cm total length (LT). The Length-Weight equation was different in males and females in 4 of the 5 five analyzed years (p<0.05). Growth parameters of von Bertalanffy equation were Loe=22.58 cm, K=0.66 yr-1, t0=-0.26, M=1.45 yr-1, F=1.73 years-1, Z=3.18 years-1. The exploitation rate was E=0.54, indicating that «chiochio» was in phase of optimal exploitation but requires control actions on landing sizes due to the presence of recruit

Ornamental plants: annual reports and research reviews

Ohio State University Extension Nursery, Landscape, and Turf Team Directory: 1998 / Jack Kerrigan -- Floriculture Industry Roundtable of Ohio: 1998 / Charles Behnke -- Ohio State University Extension Buckeye Yard and Garden Line / James A. Chatfield, Pamela J. Bennett, Joseph F. Boggs, Gary Y. Gao, Jane C. Martin, David J. Shetlar and Randall H. Zondag -- Environmental and cultural problems of ornamental plants in Ohio: 1997 / Pamela J. Bennett and Jane C. Martin -- Insect and mite activity noted in Ohio nurseries and landscapes: 1997 / Joseph F. Boggs, David J. Shetlar, Jane C. Martin, Pamela J. Bennett, James A. Chatfield, Gary Y. Gao and Chris Carlson -- Summary of ornamental diseases in Ohio: 1997 / James A. Chatfield, Nancy J. Taylor, Stephen N. Nameth, Chris Carlson, Joseph F. Boggs, Jane C. Martin, Dan Balser and David Madison -- Weed problems in Ohio landscapes and nurseries: 1997 / Gary Y. Gao, Joseph F. Boggs, Pamela J. Bennett, Jane C. Martin, Mary Ann Rose, Joseph W. Rimelspach, Randall H. Zondag and William E. Pound -- Wildlife problems in Ohio landscapes: 1997 / Gary Y. Gao, Joseph F. Boggs, Jane C. Martin, Charles T. Behnke and James A. Chatfield -- Summary of turf cultural and disease problems in 1997 / Gary Y. Gao, Joseph F. Boggs, Pamela J. Bennett, Jane C. Martin, Joseph W. Rimelspach and James A. Chatfield -- Master Gardeners serve Ohio / Marianne Riofrio -- The greening of Poland's nurseries / Kenneth D. Cochran and Wojtek Grabczewski -- The marketing potential of Ginkgo biloba in the United States / Kenneth D. Cochran -- Composts in the Landscape: Effects on Soil pH and plant growth / Mary Ann Rose and Hao Wang -- How to optimize disease control using composts / Harry A. J. Hoitink, Wei-Zheng Zhang, David Y. Han, Alexandra G. Stone, Matthew S. Krause and Warren A. Dick -- The flowering sequence of ornamental plants as a tool for predicting the phenology of insect pests / Daniel A. Herms -- Reducing maintenance costs may mean selecting plants with the fewest flaws / T. Davis Sydnor-- Comprehensive aesthetic evaluations of crabapples at Secrest Arboretum in Wooster: 1993-1997 / Erik A. Draper, James A. Chatfield, Kenneth D. Cochran, Peter W. Bristol and David E. Allen -- Precision control of microirrigation for container-grown mini-roses / Robert C. Hansen, Ted H. Short, C. C. Pasian and R. Peter Fynn -- Red thread (Laetisaria fuciformis) control study on perennial ryegrass / Joseph W. Rimelspach, Kerry Kline, Karl Danneberger and Michael Boehm-- Red thread (Laetisaria fuciformis) control study on Kentucky bluegrass / Joseph W. Rimelspach, Kerry Kline, Karl Danneberger and Michael Boehm -- Red thread - from novelty to nuisance / Joseph W. Rimelspach -- Chrysanthemum cultivars differ in response to photoperiod when grown under far-red absorbing filters / M. J. McMahon -- Improving fuchsia cutting performance by grafting / D. M. Napier and M. J. McMahon -- Paint/paclobutrazol mix on the inside surface of rooting wedge cells to control poinsettia cutting height / Claudio C. Pasian -- Response of poinsettias to paclobutrazol in paint applications / Claudio C. Pasian and Daniel K. Struve -- Dynamic transpiration of highly stressed container-grown Acer rubrum / Ted H. Short, Ahmet Irvem and Robert C. Hansen -- Effects of temperature on the development of Asiatic Lilies / J. Steininger and C. C. Pasian-- New publications for 1997-199