91,474 research outputs found
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
Progetto per il monumento funebre di John Barclay e altri lavori nel pontificato di Urbano VIII Barberini
No full textNella scheda si analizza il "recto" di uno dei disegni più interessanti della inedita collezione Gnerucci di Cortona, in è raffigurato il noto monumento funebre ideato da Pietro da Cortona in onore del poeta scozzese John Barclay, grande amico di Maffeo Barberini (papa Urbano VIII) e guida intellettuale del giovane nipote Francesco Barberini. Assieme al disegno del monumento funebre, non ancora nella forma definitiva, nel foglio è raffigurata anche il modello di una una finestra per un edificio non identificato con il simbolo araldico dell'ape Barberini. Il foglio Gnerucci è certamente appartenuto a un taccuino (poi smembrato) che doveva raccogliere bozzetti e modelli progettuali di Pietro da Cortona rimasti nella sua bottega
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
Temporal development of hippocampal cell death is dependent on tissue strain but not strain rate
No full textDeformation of brain tissue in response to mechanical loading of the head is the root-cause of traumatic brain injury (TBI). Even below ultimate failure limits, deformation activates pathophysiological cascades resulting in delayed cell death. Injury response of soft tissues, such as the chest and spinal cord, is dependent on the product of deformation and velocity, a parameter termed the viscous criterion. We set out to test if hippocampal cell death could be predicted by a similar combination of strain and strain rate and if the viscous criterion was valid for hippocampus. Quantitative prediction of the brain's biological response to mechanical stimuli is difficult to achieve in animal models of TBI, so we utilized an in vitro model of TBI based on hippocampal slice cultures. We quantified the temporal development of cell death after precisely controlled deformations for 30 combinations of strain (0.05-0.50) and strain rate (0.1-50 s(-1)) relevant to TBI. Loading conditions for a subset of cultures were verified by analysis of highspeed video. Cell death was found to be significantly dependent on time-post injury, on strain magnitude, and to a lesser extent, on anatomical region by a repeated-measures, three-way ANOVA. The responses of the CA1 and CA3 regions of the hippocampus were not statistically different in contrast to some in vivo TBI studies. Surprisingly, cell death was not dependent on strain rate leading us to conclude that the viscous criterion is not a valid predictor for hippocampal tissue injury. Given the large data set and extensive combinations of biomechanical parameters, predictive mathematical functions relating independent variables (strain, region, and time post-injury) to the resultant cell death were defined. These functions can be used as tolerance criteria to equip finite element models of TBI with the added capability to predict biological consequences
Cylloepus segurae Polizei & Barclay 2019, sp. nov.
No full textCylloepus segurae Polizei & Barclay sp. nov. (Fig 2 A–C) urn:lsid:zoobank.org:act: 367CFDC0-ED3E-445F-915C-ABD96C8D150E Type locality. Santa Cruz, Bolivia. Male holotype: ♂ | Holotype | BOLIVIA: Santa Cruz / Amboro National Park / Los Volcanes, c. 1000m / S 18º 06’: W63º 36’ / 20.xi–12.xii.2004 | MV Light Sheet / on stream beach / Barclay, M.V.L. / & Mendel, H. / BMNH (E)2004-280 | NHMUK010583885. (BMNH). Paratypes: 3 specimens with same data as the holotype. 1 (BMNH); 2 (MZUSP) (MZSP 35379; 35380). Diagnosis. Body elongate, slightly convex. Head with granules; antenna with short antennomeres. Pronotum slightly wider than long, covered with long golden setae; deep longitudinal impression on the disc. Elytra with the anterior margin yellow and two yellow patches near the apex. Pair of flat spines at the apex of each tibia. Abdomen with a pair of carinae on the first ventrite. Male genitalia with the phallobase slightly shorter than parameres; parameres slightly compressed dorsoventrally, wider at the base, strongly narrowed towards apex, apex sharply curved towards the inner margin; penis with the basal two thirds broad, almost parallel sided, and then tapering towards the sharp apex. Description. Male. Maximum length 2.84mm, maximum width 1.15mm. Body elongate, slightly convex. Pronotum and mouthparts dark-brown colour, with antenna and legs reddish-brown, and elytra brown with the anterior portion and two patches near to apex yellow. Head: Partly retractable, without impressions, surface with granules, clearly separated by their own diameter. Eyes projected laterally. Antenna filiform with 11 short antennomeres, the three apical antennomeres with setae (Fig. 2A). Clypeus slightly concave with granules with the same pattern as the head. Frontoclypeal suture distinctly straight. Labrum with the anterior margin rounded, covered by thin golden setae. Thorax: Pronotum slightly wider than long (Fig. 2A), (length: 0.74mm, width: 0.82mm); anterior margin convex; lateral margin sinuous and granulated, anterior angles produced, acute; posterior margin trisinuate. Pronotum surface with punctures and long golden setae. Sublateral carinae sinuous, reaching the anterior and posterior margin, wider on the middle portion. Deep depression on anterior portion of the longitudinal carinae. Longitudinal impression wide and deep on the disc and with a depression on each side of the posterior portion (Fig. 2A). Elytra longer than wide (length: 2.09mm, width: 1.15mm), anterior margin sinuous, lateral margin straight, apex rounded. Elytral suture elevated. Elytra with ten intervals, surface with rows of dense granules, separated by two rows of long setae on each interval. Brown colour, with the anterior margin yellow, extending for 1/5, and two yellow patches of triangular shape near to apex (Fig. 2A). Carinae on the intervals; 3, 4, 6 and 8, on the third interval extending for 1/5, on fourth interval extending half of the elytra, and the sublateral carinae (sixth and eighth intervals), extending for ¾ of elytral length. Epipleura with the anterior-half covered by tomentum (Fig. 2A). Scutellum dark-brown colour, long and narrow, without punctures, with two rows of three golden setae. Hind wings macropterous. Prosternum covered by tomentum and punctures separated by their own diameter (except on the hypomera). Prosternal process U-shaped (Fig. 2B), reaching the coxae, with the surface with punctures and tomentum. Mesoventrite short, with a shallow depression to receive the prosternal process, surface covered by tomentum. Metaventrite broad, moderately pronounced, with the surface similar to the surface of the prosternal process (Fig. 2B). Legs (except the tarsi) covered by tomentum. Coxae slightly elongate, hind coxae with two rounded depressions; femora with microsetae; tibiae long and thin, with fringe of tomentum on distal ¾, and a pair of long, flat spines at the apex, tarsi long, 5- 5-5, with a few setae at the apex of each tarsomere, and the last tarsomere slightly smaller than the previous four combined. Claws long and thin. Abdomen: Five ventrites (Fig. 2B), (length: 1.24mm, width: 1.05mm). Surface covered by tomentum, except the disc of the first and second ventrite, and with punctures scattered randomly up to twice their own diameter. First ventrite carinate on the disc. Fifth with a few setae on the apex, and with lateral margins slightly produced posterolaterad. Genitalia: (Fig. 2C); (length: 0.57mm, width: 0.18mm): Phallobase twice as long as wide and slightly shorter than parameres. Parameres slightly shorter than penis and slightly compressed dorsoventrally, wider at the basal, strongly narrowed towards apex, apex sharply curved towards the inner margin. Penis with the basal two thirds broad, almost parallel sided, and then tapering towards the sharp apex. Fibula elongate, approximately half the length of penis. Corona present, arrangement of tiny rod-like sclerotizations. Female. Similar to the male. Etymology. The specific epithet segurae is in honour of Dr. Melissa Ottoboni Segura, one of the pioneers in the study of the elmids of Brazil. Comparative notes. Cylloepus segurae sp. nov. is similar to Cylloepus ventralis Hinton, 1940 in the antenna with short antennomeres; pronotum with lateral margin sinuous, very deep longitudinal impression on the disc, and tibiae with fringe of tomentum on distal ¾. However it can easily be differentiated by the dark brown colour of the elytra of C. segurae, with the yellow anterior margin extending for 1/5 of the elytra, and two yellow patches of triangular shape near to the apex; sublateral carinae on the pronotum reaching the anterior and posterior margin; epipleura with the anterior-half covered by tomentum and disc of the first and second ventrite not covered by tomentum, while C. ventralis has the elytra uniformly brown; sublateral carinae on pronotum only reaching the anterior margin; epipleura are entirely covered by dense tomentum, and the disc of the first to fourth ventrites is not covered by tomentum.Published as part of Polizei, Thiago T. S. & Barclay, Maxwell V. L., 2019, The genus Cylloepus Erichson, 1847 (Coleoptera: Elmidae: Elminae) new species and combinations, pp. 93-100 in Zootaxa 4652 (1) on pages 97-99, DOI: 10.11646/zootaxa.4652.1.3, http://zenodo.org/record/336357
Experience of once-daily aminoglycoside dosing using a target area under the concentration-time curve
No full textCopyright © 2007 The Authors Journal compilationThe definitive version may be found at www.wiley.comM. L. Barclay, S. B. Duffully, E. J. Begg, R. C. Buttimor
Securing XML documents with author-X
No full textAuthor-X is a Java-based system that addresses the security issues of access control and policy design for XML document administration. Author-X supports the specification of policies at varying granularity levels and the specification of user credentials as a way to enforce access control. Access control is available according to both push and pull document distribution policies, and document updates are distributed through a combination of hash functions and digital signature techniques. The Author-X approach to distributed updates allows a user to verify a document's integrity without contacting the document server
Bibliographics for the 983 eprints in the live archives of E-LIS : trends and status report up to 7th July 2004, based on author-self-archiving metadata
No full textThe priority for ideas and philosophy related to "Network Theory" have been traced back and documented by Braun(2004),and credit goes to Karinthy(1929).The IT has empowered to realise it, as the most practical phenomena and it is no more a humour. The OAI (Open Archives Initiatives)and ACIS (Academic Contributor Information System)are progressive in the direction ,which may lead to realise the "Collective Genius" at global level. Focus of present study is on Author-Self-Archiving (A-S-A)Metadata of the 983 Eprints in the Live Archives of the E-LIS (EPrints of Library and Information Science),which were approved till 7th July 2004.The A-S-A Metadata was used for librametric analysis. Self-explanatory bibliographics are illustrated.The highlights include: Conference papers (34%); highest approval, June 2004 (28%); published archives (76%);not refereed (52%); not in public domain (60%); highest self-archiving-author (De Robbio, Antonella).The Nos. of EPrints having single JITA domain specifications were: Theoretical and general aspects of libraries and information(27); Information use and sociology of information(80);Users,literacy and reading(13);Libraries as physical collections(30);Publishing and legal issues(57);Management(13);Industry, profession and education(36);Information sources, supports, channels(113) ; Information treatment for information services, Information functions and techniques (101); Technical services libraries, archives and museums(25); Housing technologies(1); Information technology and library technology(92); and Inter-domainery (395) i.e. having specifications of two or more than two JITA classes
Author's address:
No full textCan archives of audiovisual TV interviews be used to make authors more visible to students, and thereby reduce the learning gap between native and non-native language speakers in college classes? We examined students in a college course who learned about one scholar's ideas through watching an audiovisual TV interview (i.e., visible author format) and about another scholar's ideas through reading a formal text description (i.e., invisible author format). For the invisible author, native language speakers scored significantly higher than the non-native language speakers on a corresponding exam question (i.e., a cognitive measure), generated more words on the exam question (i.e., a motivational measure), and mentioned the author's name more often in answering the exam question (i.e., an affective measure). For the visible author, the groups did not differ on any of these measures. These findings provide evidence for the idea that making the author visible through audiovisual TV interviews can eliminate the learning gap between native and non-native language speakers. 3 Universities around the world serve students who are non-native speakers of th
Scientometric Portrait of Nobel Laureate S. Chandrasekhar
No full textScientometric analysis of the publications productivity of Nobel Laureate S. Chandrasekhar is documented
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