27 research outputs found
Do you cite what you tweet? Investigating the relationship between tweeting and citing research articles
The last decade of altmetrics research has demonstrated that altmetrics have
a low to moderate correlation with citations, depending on the platform and the
discipline, among other factors. Most past studies used academic works as their
unit of analysis to determine whether the attention they received on Twitter
was a good predictor of academic engagement. Our work revisits the relationship
between tweets and citations where the tweet itself is the unit of analysis,
and the question is to determine if, at the individual level, the act of
tweeting an academic work can shed light on the likelihood of the act of citing
that same work. We model this relationship by considering the research activity
of the tweeter and its relationship to the tweeted work. Results show that
tweeters are more likely to cite works affiliated with their same institution,
works published in journals in which they also have published, and works in
which they hold authorship. It finds that the older the academic age of a
tweeter the less likely they are to cite what they tweet, though there is a
positive relationship between citations and the number of works they have
published and references they have accumulated over time
Recommended from our members
The ecology, subsistence and diet of ~45,000-year-old Homo sapiens at Ilsenhöhle in Ranis, Germany
Recent excavations at Ranis (Germany) identified an early dispersal of Homo sapiens into the higher latitudes of Europe by 45,000âyears ago. Here we integrate results from zooarchaeology, palaeoproteomics, sediment DNA and stable isotopes to characterize the ecology, subsistence and diet of these early H. sapiens. We assessed all bone remains (nâ=â1,754) from the 2016-2022 excavations through morphology (nâ=â1,218) or palaeoproteomics (zooarchaeology by mass spectrometry (nâ=â536) and species by proteome investigation (nâ=â212)). Dominant taxa include reindeer, cave bear, woolly rhinoceros and horse, indicating cold climatic conditions. Numerous carnivore modifications, alongside sparse cut-marked and burnt bones, illustrate a predominant use of the site by hibernating cave bears and denning hyaenas, coupled with a fluctuating human presence. Faunal diversity and high carnivore input were further supported by ancient mammalian DNA recovered from 26 sediment samples. Bulk collagen carbon and nitrogen stable isotope data from 52 animal and 10 human remains confirm a cold steppe/tundra setting and indicate a homogenous human diet based on large terrestrial mammals. This lower-density archaeological signature matches other Lincombian-Ranisian-Jerzmanowician sites and is best explained by expedient visits of short duration by small, mobile groups of pioneer H. sapiens. [Abstract copyright: © 2024. The Author(s).
Recommended from our members
Homo sapiens reached the higher latitudes of Europe by 45,000 years ago
The Middle to Upper Palaeolithic transition in Europe is associated with the regional disappearance of Neanderthals and the spread of Homo sapiens. Late Neanderthals persisted in western Europe several millennia after the occurrence of H.âsapiens in eastern Europe1. Local hybridization between the two groups occurred2, but not on all occasions3. Archaeological evidence also indicates the presence of several technocomplexes during this transition, complicating our understanding and the association of behavioural adaptations with specific hominin groups4. One such technocomplex for which the makers are unknown is the LincombianâRanisianâJerzmanowician (LRJ), which has been described in northwestern and central Europe5,6,7,8. Here we present the morphological and proteomic taxonomic identification, mitochondrial DNA analysis and direct radiocarbon dating of human remains directly associated with an LRJ assemblage at the site Ilsenhöhle in Ranis (Germany). These human remains are among the earliest directly dated Upper Palaeolithic H.âsapiens remains in Eurasia. We show that early H.âsapiens associated with the LRJ were present in central and northwestern Europe long before the extinction of late Neanderthals in southwestern Europe. Our results strengthen the notion of a patchwork of distinct human populations and technocomplexes present in Europe during this transitional period
Who Re-Uses Data ?
Les donnĂ©es ouvertes font lâobjet dâune attention et dâun soutien accrus dans les milieux universitaires. Afin de justifier que les donnĂ©es partagĂ©es peuvent ĂȘtre rĂ©utilisĂ©es dans dâautres recherches, ce document examine quelles preuves existen pour cette rĂ©utilisation, et quelle est la relation entre les producteurs dâensembles de donnĂ©es partagĂ©s et les chercheurs qui les utilisent. En utilisant un Ă©chantillon de citations de donnĂ©es dâOpenAlex, cette Ă©tude examine la relation entre les crĂ©ateurs et les utilisateurs dâensembles de donnĂ©es chez lâindividu, aux niveaux institutionnel et national
Field Oriented Control-Based Reduction of the Vibration and Power Consumption of a Blood Pump
Enabling More Solar in Distribution Network with an Automated Analysis Tool
As smart grids come into reality, our grid is also accommodating more and more distributed and renewable generation. How more solar generation can be enabled in areas of high distributed generation penetration is the main focus of this research. An automated PV analysis tool is developed to identify critical cases to time efficiently assess medium voltage photovoltaic system maximum capacity. The tool incorporates a set of sub-processes and methods to identify critical cases with spatial, temporal and electrical features. Results show that more than 99% time reduction can be achieved with higher than 97% accuracy compared to running analysis for yearly datasets. Also potentially seven times more PV can be enabled with distribution network state estimation and the PV analysis tool
Ligamentous Lisfranc injuries: analysis of CT findings under weightbearing.
PURPOSE
The aim of this study was to investigate the influence of different ligamentous Lisfranc injuries on computed tomography (CT) findings under weight-bearing and to emphasize the indications for surgical treatment of their various types.
METHODS
Sixteen human cadaveric lower limbs were placed in weight-bearing radiolucent frame for CT scanning. All intact specimens were initially scanned, and then, dorsal approach was used for sequential ligaments cutting of: (1) the dorsal and the interosseous (Lisfranc) ligaments between medical cuneiform (MC) and metatarsal 2 (MT2); (2) the plantar ligament between the MC and MT3; (3) the plantar ligament between MC and MT2. Based on sequential CT scans, the distances MT1-MT2, MC-T2, as well as the alignment and dorsal displacement of MT2 were measured.
RESULTS
Slight increase in the distances MT1-MT2 and MC-MT2 was observed after the disruption of the dorsal and the interosseous ligaments. Further increase in MT1-MT2 and MC-MT2 distances was registered after the disruption of the ligament between MC and MT3. The largest distances MT1-MT2 and MC-MT2 were measured after the final plantar ligament cut between MC and MT2.
CONCLUSIONS
Unequivocal instability is observed with simultaneous transection of the Lisfranc ligament with both plantar ligaments. On CT used as diagnostic tool, plantar injuries at the basis of the second and the third metatarsal are indirect signs of violation of the ligaments and represent an indication for surgical treatment. When using magnetic resonance imaging as diagnostic tool, a ruptured Lisfranc ligament alone without dislocation does not necessarily need surgical intervention
Simultaneous measurements of three-dimensional trajectories and wingbeat frequencies of birds in the field
Underneath the cerclage: an ex vivo study on the cerclage-bone interface mechanics
Cerclages regain interest due to a rising number of periprosthetic fractures. The contact distribution at the circumferential cerclage-bone interface is still unknown. Local interface pressure depends on the amount of contact area. Cortical damage at the interface would provoke cerclage loosening. Therefore, the contact area, the bone pressure along the interface and the cortical resistance underneath loaded cerclages were determined in an ex vivo model