314,214 research outputs found
The HRIC of the SIMBIO-SYS suite for BepiColombo: an instrument for high resolution multicolour mapping of Mercury surface
No full textAn understanding of the mineralogical composition of Mercury’s surface is needed to shed light on the formation and evolution of the planet and a detailed study of the surface geomorphology will allow discriminating the relative extent and importance of exogenic and endogenic processes, surface modification (crustal differentiation and resurfacing), cratering, tectonics and volcanism. An improved knowledge of Mercury
surface properties also represents a crucial achievement to understand the formation
and evolution of the terrestrial planets.
In order to analyze the geological and mineralogical characteristics of the Mercury
surface, the integrated package SIMBIO-SYS (Spectrometers and Imagers for MPO
BepiColombo - Integrated Observatory SYStem) is included in the scientific payload
of the ESA mission BepiColombo, to be launched in 2014. The SIMBIO-SYS suite
includes imaging channels, with high spatial resolution and stereo capability, and a
spectrometer in the visible-near infrared range. The High Resolution Imaging Channel
(HRIC) main objective is the characterization of special surface targets with high
resolution (up to 5 m/px at periherm), which will be used in the context of the medium
resolution Stereo Camera (STC) images for a comprehensive geological mapping of
the Mercury’s surface. The multicolour HRIC images (broad-band filters centred at
550, 700 and 880 nm) will be useful to cross-correlate the surface composition with
the morphological features, both at local and global scales.
Here we present the expected performances of the HRIC in terms of surface mapping
(mosaicing reconstruction, expected SNR, surface coverage. . . ), obtained b
The stereo channel (STC) of the SIMBIO-SYS instrument for the BepiColombo mission to Mercury
No full textBepiColombo is the cornerstone n.5 of ESA, and it will be launched on August
2013. It is composed by two modules: the Mercury Planetary Orbiter (MPO) and the
Mercury Magnetospheric Orbiter (MMO), and with a suite of instruments which shall allow
to perform observations with a level of details considerably improved respect to the NASAs
Messenger mission launched in 2004. The SIMBIO-SYS (Spectrometers and Imagers for
MPO BepiColombo Integrated Observatory SYStem) instrument is a system integrating a
STereoscopic imaging Channel (STC), a High spatial Resolution Imaging Channel (HRIC)
and a Visual and Infrared Hyper-spectral Imager channel (VIHI). SIMBIO-SYS has been
selected by ESA in the payload of the MPO. The main scientific objective of STC is the
global mapping of the entire surface of Mercury in 3D and colors with a maximum spatial
resolution of 50 m per pixel. It will allow to generate the Digital Terrain Model (DTM) of
the entire surface improving th
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
SYS — Konzept und Anwendungsmöglichkeiten eines benutzerfreundlichen Systems
No full textEin Benutzersystem sollte vielseitig sein und unkompliziert in der Anwendung. In SYS wird versucht, diese beiden Forderungen zu vereinigen. Das System setzt auf der Benutzerseite keinerlei spezifische EDV-Kenntnisse voraus und deckt auf der Problemseite ein breites Spektrum möglicher Anwendungen ab. Die Möglichkeiten und Eigenschaften des Systems SYS in seiner jetzt vorliegenden Ausbaustufe — stark erweitert im Vergleich zur ersten veröffentlichten Fassung — werden beschrieben und zur Diskussion gestellt.</jats:p
SIMBIO-SYS FOP update after ICO#02
No full textA Silvio, amico e conforto.This document, in according to the Spectrometers and Imagers for MPO BepiColombo Integrated Observatory SYStem (SIMBIO-SYS) Technical Note, Layout and Data flow agreement, reports all the SIMBIO-SYS Flight Operation Procedures (FOPs) to be used during the operational phases of the instrument. This issue represents a new review of the SIMBIO-SYS FOP official database considering all the improvements made after the first two Instrument Check Outs (ICO) and before the third
POPTOP expression requires POP-1 and SYS-1.
No full text<p>(A) POPTOP or <i>pop-1(q624)</i>; POPTOP animals were grown on <i>E. coli</i> HT115(DE3) carrying control RNAi or <i>cacn-1</i> RNAi vector. (B) POPTOP animals were grown on <i>E. coli</i> HT115(DE3) carrying control RNAi, <i>sys</i>-1 RNAi, <i>wrm-1</i> RNAi, <i>bar</i>-1 RNAi, or <i>hmp-2</i> RNAi vector. (C) POPTOP animals were grown on <i>E. coli</i> HT115(DE3) carrying <i>cacn-1</i>+<i>sys-1</i> RNAi, <i>cacn-1</i> RNAi or <i>sys-1</i> RNAi. Individual points represent mean pixel intensity (a.u.) per pixel for a single animal for a given RNAi treatment. Error bars indicate mean ± standard error of the mean. *** indicates statistical significance of P<0.0001, * indicates statistical significance of P<0.05. n.s. is not significant.</p
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