1,050 research outputs found
Richard Koenig: See Change: A Memoir
No full textPublished online only at http://lenscratch.com/2022/07/richard-koenig-see-change-a-memoir/In this article, a memoir of sorts, the author outlines “mutations of a medium [fine art photography in the
United States], and one it its disciples, over time”. This covers more than forty years beginning with his
formal study of photography at Indiana University in 1979, through his time at Pratt Institute in Brooklyn,
New York, and on to the current time and his latest project, “City as Metaphor.
The CU box-model data (Version 1.0)
No full textUniversity of Colorado iodine data measured in the UTLS aboard the NSF-NCAR GV aircraft during two field campaigns:
Tropical Ocean tRoposphere Exchange of Reactive Halogen Species and Oxygenated VOC (TORERO), Eastern Pacific Ocean
CONvective Transport of Active Species in the Tropics (CONTRAST), Western Pacific Ocean
References: Volkamer et al., 2015 (doi:10.5194/amt-8-2121-2015), Pan et al., 2016 (doi:10.1175/BAMS-D-14-00272.1)
Principal Investigator: Prof. Rainer Volkamer ([email protected])
Data prepared by Dr. Theodore K. Koenig ([email protected])
This file contains data as presented in Koenig et al., 2020 (doi:10.1073/pnas.1916828117)
Iodine monoxide (IO) is measured by the CU AMAX-DOAS instrument following methods described in Dix et al., 2016 (doi:10.5194/amt-9-5655-2016) with minor adaptations. The uncertainty in the IO mixing ratio for these measurements in the UTLS is better than reported in Dix et al., namely, it is 20% of the measured mixing ratio but not better than 0.03 ppt. These components should be added in quadrature: err(IO) = sqrt( (0.2*IO)^2 + 0.03^2)
IO/Iy is the ratio of iodine monoxide to total gas-phase iodine (Iy) modeled using the CU box-model constrained by measured temperature, pressure, chemical concentrations, particle size distributions, and photolysis frequencies. The uncertainty is estimated as 30% of the ratio, incl. errors in the calibration of in-situ and remote sensing data, and accounting for differences in the spatial scales. The inferred Iy is based on the measured IO and modeled IO/Iy. The uncertainty in Iy is propagated from the uncertainties in IO and that of IO/Iy
Die Wirbeltiersammlungen des Museums Alexander Koenig. I. S\ue4ugetiere
No full textVolume: 19Start Page: 9End Page: 4
Type specimens of mammals (Mammalia) in the collections of the Zoologisches Forschungsmuseum Alexander Koenig, Bonn
No full textVolume: 59Start Page: 3End Page: 2
Identifying essential genes across eukaryotes by machine learning
No full textAbstract Identifying essential genes on a genome scale is resource intensive and has been performed for only a few eukaryotes. For less studied organisms essentiality might be predicted by gene homology. However, this approach cannot be applied to non-conserved genes. Additionally, divergent essentiality information is obtained from studying single cells or whole, multi-cellular organisms, and particularly when derived from human cell line screens and human population studies. We employed machine learning across six model eukaryotes and 60 381 genes, using 41 635 features derived from the sequence, gene function information and network topology. Within a leave-one-organism-out cross-validation, the classifiers showed high generalizability with an average accuracy close to 80% in the left-out species. As a case study, we applied the method to Tribolium castaneum and Bombyx mori and validated predictions experimentally yielding similar performances. Finally, using the classifier based on the studied model organisms enabled linking the essentiality information of human cell line screens and population studies
Claes Oldenburg : Raw Notes : Documents and Spirits of the Performances : "Stars", "Moveyhouse", "Massage", "The Typewriter" with Annotations by the Author
No full textReproduces Oldenburg's complete unaltered collection of documents (including scripts, notes, instructions, theory) relating to four performances dating from 1963-1968, transcribed from their original form. Includes annotations by the author and examples of the original manuscripts
Quantitative detection of Iodine in the stratosphere
No full textOzone in the extrapolar lower stratosphere is currently declining for reasons that are not well understood. Iodine is emitted mostly from marine sources, and changing iodine emissions provide a possible chemical reason for why ozone in the lower stratosphere continues to decline (Koenig et al., 2020). Previous stratospheric measurements had detected iodine qualitatively in particles. More recently, IO observations in the daytime tropical tropopause layer (TTL) have suggested that between 0.25 to 0.70 pptv Iy are injected into the stratosphere, which is 1.6 to 3.5 times the WMO2014 upper limit. These indirect observations have led to revised estimates of 0 - 0.8 pptv Iy stratospheric injection in the WMO2018 report. This presentation discusses first quantitative measurements of IO radicals and of submicron particulate iodine from aircraft in the stratospherethat support 0.77 pptv Iy stratospheric injection. Our observations support the WMO2018 upper limit estimate, and clearly are incompatible with zero iodine injection. The implications of theobseved iodine concentrations for ozone loss in the lower stratosphere are discussed, also in light of climate records that find increasing iodine in recent decades, observed ozone trends, andongoing and future research needs to better quantify iodine´s contribution to explain these trends.Fil: Rainer, Volkamer. State University of Colorado at Boulder; Estados UnidosFil: Koenig, Theodore K.. State University of Colorado at Boulder; Estados UnidosFil: Campuzano Jost, Pedro. State University of Colorado at Boulder; Estados UnidosFil: Saiz López, Alfonso. Consejo Superior de Investigaciones Científicas. Instituto de Química Física "Rocasolano"; EspañaFil: Jimenez, Jose L.. State University of Colorado at Boulder; Estados UnidosFil: Fernandez, Rafael Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina. Universidad Tecnologica Nacional. Secretaria de Ciencia Tecnologia y Posgrado.; ArgentinaFil: Kinnison, Douglas E.. National Center for Atmospheric Research; Estados UnidosFil: Cuevas, Carlos A.. Consejo Superior de Investigaciones Científicas. Instituto de Química Física "Rocasolano"; EspañaGeneral Assembly 2020 of the European Geosciences UnionVienaAustriaCopernicus Meeting
A preliminary census and notes on the distribution of the Barbary Falcon (Falco pelegrinoides Temminck, 1829) in the Canary Islands
No full textAs a result of an initial census of the Barbary Falcon in the Canary Islands that was carried out between 1987 and 1988, a total of seven pairs have been detected on the islands of Lanzarote and Fuerteventura. On the other hand, the species can be considered to have become extinct on Tenerife and Gran Canaria. Finally some breeding data are presented and the most important threat factors are analyzed.We would like to express our most sincere gratitude to the "Dirección General del Medio Ambiente del Gobierno de Canarias" for totally financing this study; Dr. Rainer Hutterer of the Alexander Koenig Museum in Bonn, Mr. Richard Sloss of the American Museum of Natural History, New York, and Dr. Peter Colston of the ornithological section, British Museum, Tring, for kindly providing information rearding the falcons in their respective collections originating from the Canary Islands; Mr. Stephan Scholz for informing us of his observations of the Barbary Falcon of Fuerteventura; Dr. Aurelio Martín, La Laguna University, for revising and critically commenting on the manuscript, and finally Mr. Antonio Godiño, La Laguna, for allowing us to handle and photograph the birds in his private collection.Peer reviewe
Author response
No full textThe biotrophic fungus Ustilago maydis causes smut disease in maize with characteristic tumor formation and anthocyanin induction. Here, we show that anthocyanin biosynthesis is induced by the virulence promoting secreted effector protein Tin2. Tin2 protein functions inside plant cells where it interacts with maize protein kinase ZmTTK1. Tin2 masks a ubiquitin-proteasome degradation motif in ZmTTK1, thus stabilizing the active kinase. Active ZmTTK1 controls activation of genes in the anthocyanin biosynthesis pathway. Without Tin2, enhanced lignin biosynthesis is observed in infected tissue and vascular bundles show strong lignification. This is presumably limiting access of fungal hyphae to nutrients needed for massive proliferation. Consistent with this assertion, we observe that maize brown midrib mutants affected in lignin biosynthesis are hypersensitive to U. maydis infection. We speculate that Tin2 rewires metabolites into the anthocyanin pathway to lower their availability for other defense responses
4. OTTI-Fachforum: Wiederaufladbare Batteriesysteme Tagungsband
No full textThe proceedings volume contains 15 contributions, most of which were overheads. There were 7 contributions of the basic seminar: Introduction to electrochemical storage systems (Juregen Garche); Conventional and advanced battery systems (Harry Koenig); Fundamentals of lead batteries (Dirk Uwe Sauer); Fundamentals of NiMH batteries (Peter Axmann); Fundamentals of Li ion systems (Margret Wohlfahrt-Mehrens); Battery charging and battery management (Andresas Jossen); Modelling and numeric simulation of electrochemical batteries (Andreas Jossen). This is followed by the eight papers of the technical forum: Applilcations in motor cars (Juergern GArche); The role of alternative drive concepts (Martin Schuessler); Battery reequirements of hybrid- and starter-alternator vehicles (Otmar Bitsche); Li ion batteries for future vehicle concepts (Joerg Kuempers); Bipolar NiMH high-performance batteries for mobile applications (Rainer Wagner); Energy management for the 14 V board network (Christine Ehret); Power supply with starter generators and double layer condensers (Rainer Knorr). (MM)Dieser Tagungsband enthaelt 15 Beitraege vorwiegend in Form von Vortragsfolien. Die sieben Themen des Grundlagenseminars sind: Einfuehrung in elektrochemische Speichersysteme (Juergen Garche); Konventionelle und weiterentwickelte Batteriesysteme (Harry Koenig); Grundlagen zu Bleibatterien (Dirk Uwe Sauer); Grundlagen zu NiMH-Batterien (Peter Axmann); Grundlagen zu Li-Ionen-Systemen (Margret Wohlfahrt-Mehrens); Ladeverfahren und Batteriemanagement (Andreas Jossen); Modellierung und numerische Simulation von elektrochemischen Speichern (Andreas Jossen). Die acht Themen des Fachforums sind: Anwendungen im automotiven Bereich (Juergen Garche); Die Bedeutung von alternativen Fahrzeugantrieben (Martin Schuessler); Battery requirements of hybrid- and starter-alternator vehicles (Otmar Bitsche); Lithium-Ionen-Batterien fuer zukuenftige Fahrzeugkonzepte (Joerg Kuempers); Bipolare NiMH-Hochleistungsbatterien fuer mobile Anwendungen (Rainer Wagner); Energiemanagement fuer das 14 V Bordnetz (Christine Ehret); Energieversorgung mit Startergenerator und Doppelschichtkondensatoren (Rainer Knorr). (MM)SIGLEAvailable from TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
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