125,036 research outputs found
Coherent Electronic Energy Transfer in Biological and Artificial Multichromophoric Systems
No full textGoing 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
Relaxation dynamics of chlorophyll b in the sub-ps ultrafast timescale measured by 2d electronic spectroscopy
No full textA thorough characterization of the early time sub-100 fs relaxation dynamics of biologically relevant chromophores is of crucial importance for a complete understanding of the mechanisms regulating the ultrafast dynamics of the relaxation processes in more complex multichromophoric light-harvesting systems. While chlorophyll a has already been the object of several investigations, little has been reported on chlorophyll b, despite its pivotal role in many functionalities of photosynthetic proteins. Here the relaxation dynamics of chlorophyll b in the ultrafast regime have been characterized using 2D electronic spectroscopy. The comparison of experimental measurements performed at room temperature and 77 K allows the mechanisms and the dynamics of the sub-100 fs relaxation dynamics to be characterized, including spectral diffusion and fast internal conversion assisted by a specific set of vibrational modes
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
Ophiomyia collini Spencer 1971
No full text<i>Ophiomyia collini</i> Spencer, 1971 <p> Material examined. 2–4 km E Dilove, motley grass along Potik Bilyi, 20.06.2018, 1 ♀; road to Antalovetska Polyana, 16.07.2017, 1 ♀; Chynadiyovo, wet clearing, 18.08.2017, 1 ♂; Okli Hed, deciduous forest with <i>Quercus</i> and <i>Caprinus,</i> 19.08.2017, 1 ♂; Antalovetska Polyana, 22.08.2017, 1 ♂, 1 ♀.</p> <p> D i s t r i b u t i o n. Belgium, British Isles, Czhech Republic, France, Germany, Lithuania, Poland, Slowakia, Sweden, Switzerland (Papp & Černý, 2015). <b>In Ukraine.</b> Kharkiv, Luhansk, Poltava and Sumy Regions (Guglya, 2011, 2012, 2013, 2015, 2017); Transcarpathia (<b>first record</b>).</p> <p>Bionomics. Collected material dates from 29 April to 26 August. In Ukraine it is common but not numerous.</p>Published as part of <i>Guglya, Yu., 2020, Mining Flies Of The Subfamily Agromyzinae (Diptera, Agromyzidae) Of Ukrainian Transcarpathia, With The Description Of Three New Species, pp. 453-478 in Zoodiversity 54 (6)</i> on page 460, DOI: 10.15407/zoo2020.06.453, <a href="http://zenodo.org/record/6455720">http://zenodo.org/record/6455720</a>
Design of an instrumentation for the automated damage detection in ceilings
No full textA diagnosis method for the detection of detachments occurring in ceilings made with the system beam-and-clay is presented. This analysis is carried out by an innovative, portable instrument. The apparatus is capable of automatically tapping a small area of the ceiling by the shot of a controlled-energy pin, and of simultaneously detecting the out of plane vibration of this area by a low-cost digital accelerometer. Different âlevelsâ in vibration correspond to different movability for the ceiling. By comparing these movabilities, we are able to indicate detachment and its severity/extension. Results of a 1-year experimental campaign in schoolrooms encourage further development and widespread application of the instrument
Farmaci per via topica e anestesia generale in Oftalmochirugia Pediatrica: manifestazioni Cliniche da interazioni Farmacologiche
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Efficacy of preoperatory systemic Clonidine administration for IOP reduction in ophthalmic surgery
No full textAbstract: A case-control study was performed in 214 eyes to evaluate the reduction of intraocular pressure (IOP) produced by oral administration of clonidine before cataract surgery and combined cataract-glaucoma surgery. Group I was composed of 109 eyes that were operated on after systemic clonidine administration. Group 2 included 105 control eyes operated on without clonidine premedication. A reduction of IOP was observed after clonidine administration and during anesthesia induction
PROBING PROTEIN AGGREGATION BY TIME-RESOLVED FLUORESCENCE DURING BETA-LACTOGLOBULIN CRYSTAL GROWTH
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