Search results for "BUNDLES"
showing 10 items of 30 documents
Simulations on the mechanism of CNT bundle growth upon smooth and nanostructured Ni as well as θ-Al2O3 catalysts
2011
Abstract In the current study, we have performed ab initio DFT calculations on the gradually growing 2D periodic models of capped single-wall carbon nanotubes (SW CNTs) upon their perpendicular junctions with the Ni(111) substrate, in order to understand the peculiarities of the initial stage of their growth on either smooth or nanostructured catalytic particles. Appearance of the adsorbed carbon atoms upon the substrate follows from the dissociation of CVD hydrocarbon molecules, e.g., CH4: (CH4)ads → (CH)ads+3Hads and (CH)ads → Cads+Hads. (Since the effective growth of CNTs upon Ni nanoparticles occur inside the nanopores of amorphous alumina, we have also simulated analogous surface react…
On double Veronese embeddings in the Grassmannian G(1,N)
2004
We classify all the embeddings of P^n in a Grassmannian of lines G(1,N) such that the composition with Pl\"ucker is given by a linear system of quadrics of P^n.
An unbounded family of log Calabi–Yau pairs
2016
We give an explicit example of log Calabi-Yau pairs that are log canonical and have a linearly decreasing Euler characteristic. This is constructed in terms of a degree two covering of a sequence of blow ups of three dimensional projective bundles over the Segre-Hirzebruch surfaces ${\mathbb F}_n$ for every positive integer $n$ big enough.
Fine-tuning lexical bundles : a methodological reflection in the context of describing drug-drug interactions
2018
This chapter has two major aims. First, it attempts to extend earlier research on recurrent phraseologies used in the pharmaceutical field (Grabowski 2015) by exploring the use, distribution and functions of lexical bundles found in English texts describing drug-drug interactions. Conducted from an applied perspective, the study uses 300 text samples extracted from DrugDDI Corpus originally collected in the Drugbank database (Segura-Bedmar et al. 2010). Apart from presenting new descriptive data, the second aim of the chapter is to reflect on the ways lexical bundles have been typically explored across different text types and genres. The problems discussed in the chapter concern the method…
On globally generated vector bundles on projective spaces II
2014
Extending a previous result of the authors, we classify globally generated vector bundles on projective spaces with first Chern class equal to three.
On identification of bilingual lexical bundles for translation purposes : the case of an English-Polish comparable corpus of patient information leaf…
2018
Grounded in phraseology and corpus linguistics, this paper aims to explore the use of bilingual lexical bundles to improve the degree of naturalness and textual fit of translated texts. More specifically, this study attempts to identify lexical bundles, that is, recurrent sequences of 3–7 words with similar discursive functions in a purpose-designed comparable corpus of English and Polish patient information leaflets, with 100 text samples in each language. Because of cross-linguistic differences, we additionally apply a number of formal criteria in order to filter out the bundles in each subcorpus. The results show that bilingual lexical bundles with overlapping discourse functions in text…
STANCE BUNDLES IN ENGLISH-TO-POLISH TRANSLATION: A CORPUS-INFORMED STUDY
2018
In this paper, we make an attempt to improve the textual fit of English-to-Polish translation of a peculiar type of multi-word units known in corpus linguistic literature as lexical bundles (Biber et al. 1999). Inspired by a study conducted by Grabar and Lefer (2015), we used the English-Polish parallel corpus Paralela (Pezik 2016) and the National Corpus of Polish (NKJP) to extract and explore the use - in terms of frequency distributions - of the Polish equivalents of selected English lexical bundles expressing attitudinal and epistemic stance. More precisely, we used the NKJP corpus to check whether the Polish equivalents are typical of contemporary Polish as found in native texts. The r…
Towards a Refined Inventory of Lexical Bundles: an Experiment in the Formulex Method
2016
A number of corpus studies focusing on the description of the use and functions of lexical bundles havebeen conducted recently in order to explore the phraseology of learner language. As with any studiesof lexical bundles, the problem of overlapping or structurally incomplete items poses a particularchallenge. In practice, it is often difficult to align such units with specific discourse functions. The factthat lexical bundles do not constitute neat form-and-meaning mappings results from, among otherreasons, their being grounded in language use rather than language system. In this pilot study weattempt to test a new method called Formulex (Forsyth, 2015a; 2015b) to verify whether an applica…
Study of cosmic ray events with high muon multiplicity using the ALICE detector at the CERN Large Hadron Collider
2016
ALICE is one of four large experiments at the CERN Large Hadron Collider near Geneva, specially designed to study particle production in ultra-relativistic heavy-ion collisions. Located 52 meters underground with 28 meters of overburden rock, it has also been used to detect muons produced by cosmic ray interactions in the upper atmosphere. In this paper, we present the multiplicity distribution of these atmospheric muons and its comparison with Monte Carlo simulations. This analysis exploits the large size and excellent tracking capability of the ALICE Time Projection Chamber. A special emphasis is given to the study of high multiplicity events containing more than 100 reconstructed muons a…
A construction of equivariant bundles on the space of symmetric forms
2021
We construct stable vector bundles on the space of symmetric forms of degree d in n+1 variables which are equivariant for the action of SL_{n+1}(C), and admit an equivariant free resolution of length 2. For n=1, we obtain new examples of stable vector bundles of rank d-1 on P^d, which are moreover equivariant for SL_2(C). The presentation matrix of these bundles attains Westwick's upper bound for the dimension of vector spaces of matrices of constant rank and fixed size.