Analysis Coordinator Report

We present the IVS analysis coordination issues of 2012. The IVS Analysis Coordinator is responsible for generating and disseminating the official IVS products. This requires consistency of the input data by strict adherence to models and conventions. The term of the current IVS Analysis Coordinator will end on February 28, 2013

Modelos mentales de comunicación y consumo. Una comparación intercultural de publicidad televisiva

Este estudio prospectivo plantea la interrogante si la publicidad televisiva difiere entre distintas culturas y si es así, cómo y en qué medida. En contraste a la mayoría de los estudios respectivos, nos hemos concentrado en un protocolo detallado basado en un análisis formal que está estadísticamente orientado. En una perspectiva más amplia, la relación entre la comunicación cara-a-cara y la comunicación mediatizada por la tecnología está escrutada. Asumiendo que hay varias diferencias, una hipótesis sería que éstas se originan en hábitos de comunicación antiguos a aquellos encontrados en la comunicación por medios tecnológicos. En parte, eso supondría una transferencia entre diferentes medios, relacionando la organización del habla con la de las imágenes. Como solamente por medio de estudios comparativos se puede responder dichas interrogantes, se compararon dos muestras de publicidad alemana y ecuatoriana. Para evitar una sobreestimación de las diferencias culturales es inevitable el investigar también el nivel intercultural para evaluar las fluctuaciones relacionadas con los contenidos

Correlations Between the Contributions of Individual IVS Analysis Centers

Within almost all space-geodetic techniques, contributions of different analysis centers (ACs) are combined in order to improve the robustness of the final product. So far, the contributing series are assumed to be independent as each AC processes the observations in different ways. However, the series cannot be completely independent as each analyst uses the same set of original observations and many applied models are subject to conventions used by each AC. In this paper, it is shown that neglecting correlations between the contributing series yields too optimistic formal errors and small, but insignificant, errors in the estimated parameters derived from the adjustment of the combined solution

Entwicklung verschiedenfarbiger Möhrensorten für den Biolandbau

Das abgeschlossene FuE-Projekt kann insgesamt als sehr erfolgreich betrachtet werden. Alle geplanten Projektziele sind im Wesentlichen erreicht worden. Das übergeordnete Projektziel - Pre-Breeding und Etablierung eines Möhrenzüchtungsprogramms für verschiedenfarbige Möhren bei Fa. satimex – ist umgesetzt worden. Projektpartner satimex steht mit Projektabschluss auf sehr breiter Basis ein Zuchtmaterial in allen Farbvarianten der Möhre sowie umfangreiches Datenmaterial als Grundlage einer zukünftigen Züchtung zur Verfügung. Umfangreiche Untersuchungen hinsichtlich des Resistenzverhaltens gegen Alternaria spp., sensorischer Parameter, flüchtiger Inhaltsstoffe sowie agronomischer Merkmale ermöglichten eine detaillierte Beschreibung und Bewertung der entwickelten Zuchtlinien und stellen eine wichtige Entscheidungshilfe für das zukünftige Zuchtprogramm dar. Darüber hinaus wurden aussichtsreiche Zuchtlinien unter Praxisbedingungen in Bio-Betrieben getestet, Daten zu Vermarktungschancen erhoben und eine Lagereignungsprüfung durchgeführt. Es wird eingeschätzt, dass mit dem Projektabschluss ein umfangreiches Zuchtmaterial in allen geplanten Farbklassen zur Verfügung steht. Farb- und Formenvielfalt ist bereits ausreichend realisiert, weiterer Züchtungsbedarf besteht insbesondere bei der äußeren und inneren Wurzelqualität, der Schossfestigkeit und der Resistenz bzw. Toleranz gegen biotische und abiotische Stressfaktoren. Eine wissenschaftliche Anschlussfähigkeit ist durch die extreme genetische Breite und morphologische Variabilität des entwickelten Zuchtmaterials gegeben, welche es für weitere wissenschaftliche Fragestellungen interessant macht. Forschungsansätze werden speziell in drei Richtungen gesehen: i) Verbesserung der Resistenz bei allen roten (Lycopin) Genotypen, ii) Aufklärung des genetischen Hintergrundes der Blühinduktion zur Verbesserung der Schossresistenz und iii) Entwicklung von molekularen Markern für Aromakomponenten der Möhre auf der Basis sensorischer und chemisch analytischer Untersuchungen

The impact of celestial pole offset modelling on VLBI UT1 Intensive results

Very Long Baseline Interferometry (VLBI) Intensive sessions are scheduled to provide operational Universal Time (UT1) determinations with low latency. UT1 estimates obtained from these observations heavily depend on the model of the celestial pole motion used during data processing. However, even the most accurate precession-nutation model, IAU 2000/2006, is not accurate enough to realize the full potential of VLBI observations. To achieve the highest possible accuracy in UT1 estimates, a celestial pole offset (CPO), which is the difference between the actual and modelled precession-nutation angles, should be applied. Three CPO models are currently available for users. In this paper, these models have been tested and the differences between UT1 estimates obtained with those models are investigated. It has been shown that neglecting CPO modelling during VLBI UT1 Intensive processing causes systematic errors in UT1 series of up to 20 microarcseconds. It has been also found that using different CPO models causes the differences in UT1 estimates reaching 10 microarcseconds. Obtained results are applicable to the satellite data processing as well.Comment: 8 pp., accepted for publication in Journal of Geodes

Homologous Deformation of the Effelsberg 100-m Telescope Determined with a Total Station

Due to gravitation the main reflector of the Effelsberg 100-m telescope of the Max Planck Institute for Radio Astronomy is deformed whenever it is tilted from zenith to arbitrary elevation angles. However, the resulting shape always is a paraboloid again, though with different parameters, a phenomenon which is called homologous deformation. In summer 2008, we have carried out measurements with a total station to determine the magnitude of these deformations in order to evaluate existing assumptions provided by the manufacturer from the telescope's design phase. The measurements are based on a newly developed approach with a Leica TCRP 1201 total station mounted head down near the subreflector. Mini-retro-reflectors are placed at various locations on the paraboloid itself and on the subreflector support structure. The results indicate that the measurement setup is suitable for the purpose and provides the information needed for a determination of elevation dependent delay corrections. The focal length changes only by about 8 mm when the telescope is tilted from 90. to 7.5. elevation angle

Diversity, genetic mapping, and signatures of domestication in the carrot (Daucus carota L.) genome, as revealed by Diversity Arrays Technology (DArT) markers

Carrot is one of the most economically important vegetables worldwide, but genetic and genomic resources supporting carrot breeding remain limited. We developed a Diversity Arrays Technology (DArT) platform for wild and cultivated carrot and used it to investigate genetic diversity and to develop a saturated genetic linkage map of carrot. We analyzed a set of 900 DArT markers in a collection of plant materials comprising 94 cultivated and 65 wild carrot accessions. The accessions were attributed to three separate groups: wild, Eastern cultivated and Western cultivated. Twenty-seven markers showing signatures for selection were identified. They showed a directional shift in frequency from the wild to the cultivated, likely reflecting diversifying selection imposed in the course of domestication. A genetic linkage map constructed using 188 F2 plants comprised 431 markers with an average distance of 1.1 cM, divided into nine linkage groups. Using previously anchored single nucleotide polymorphisms, the linkage groups were physically attributed to the nine carrot chromosomes. A cluster of markers mapping to chromosome 8 showed significant segregation distortion. Two of the 27 DArT markers with signatures for selection were segregating in the mapping population and were localized on chromosomes 2 and 6. Chromosome 2 was previously shown to carry the Vrn1 gene governing the biennial growth habit essential for cultivated carrot. The results reported here provide background for further research on the history of carrot domestication and identify genomic regions potentially important for modern carrot breeding

Reliability and Stability of VLBI-Derived Sub-Daily EOP Models

Recent investigations have shown significant shortcomings in the model which is proposed by the IERS to account for the variations in the Earth s rotation with periods around one day and less. To overcome this, an empirical model can be estimated more or less directly from the observations of space geodetic techniques. The aim of this paper is to evaluate the quality and reliability of such a model based on VLBI observations. Therefore, the impact of the estimation method and the analysis options as well as the temporal stability are investigated. It turned out that, in order to provide a realistic accuracy measure of the model coefficients, the formal errors should be inflated by a factor of three. This coincides with the noise floor and the repeatability of the model coefficients and it captures almost all of the differences that are caused by different estimation techniques. The impact of analysis options is small but significant when changing troposphere parameterization or including harmonic station position variations

Short Report of IVS Working Group 5 (WG5) on Space Science Applications - An IVS Perspective

No abstract availabl