Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Ivan Kostov"'
Autor:
Roger M. Clarnette, Ivan Kostov, Jill P. Ryan, Anton Svendrovski, D. William Molloy, Rónán O’Caoimh
Publikováno v:
Healthcare, Vol 12, Iss 13, p 1339 (2024)
Understanding risk factors for frailty, functional decline and incidence of adverse healthcare outcomes amongst community-dwelling older adults is important to plan population-level health and social care services. We examined variables associated wi
Externí odkaz:
https://doaj.org/article/774ba74b26c440c78ffb503b20e6657a
Publikováno v:
Journal of IMAB, Vol 29, Iss 1, Pp 4800-4804 (2023)
This study has examined and analyzed the public information on inspections performed by the Executive Agency "Medical Supervision" (EAMS) of hospitals in the country - specialized obstetrics and gynaecology hospitals and departments in multidisciplin
Externí odkaz:
https://doaj.org/article/ec6e46274bc44052bf06b75b20af219f
Autor:
Ivan Kostov
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 9, Pp 1-37 (2022)
Abstract The finite-volume thermodynamics of a massive integrable QFT is described in terms of a grand canonical ensemble of loops immersed in a torus and interacting through scattering factors associated with their intersections. The path integral o
Externí odkaz:
https://doaj.org/article/d9011a645d944aa0b386f3bb36725141
Autor:
Ivan Kostov, Valentina B. Petkova
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 6, Pp 1-29 (2021)
Abstract We continue the study of the octagon form factor which helps to evaluate a class of four-point correlation functions in N $$ \mathcal{N} $$ = 4 SYM theory. The octagon is characterised, besides the kinematical parameters, by a “bridge” o
Externí odkaz:
https://doaj.org/article/619854ae141547b198d520c498bef66f
Autor:
Stanislav Stoykov, Ivan Kostov
Publikováno v:
Games, Vol 14, Iss 2, p 24 (2023)
A numerical procedure capable of obtaining the equilibrium states of oligopoly markets under several assumptions is presented. Horizontal and vertical product differentiation were included by taking into account Euclidean distance in a two-dimensiona
Externí odkaz:
https://doaj.org/article/a7057bf4889146d5a4cb2f5c55ce1f74
Autor:
Ivan Kostov
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 2, Pp 1-25 (2020)
Abstract We construct an effective Quantum Field Theory for the wrapping effects in 1+1 dimensional models of factorised scattering. The recently developed graph-theoretical approach to TBA gives the perturbative desctiption of this QFT. For the sake
Externí odkaz:
https://doaj.org/article/042716407318499b8f01067fe9374025
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 11, Pp 1-27 (2019)
Abstract The computation of a certain class of four-point functions of heavily charged BPS operators boils down to the computation of a special form factor — the octagon. In this paper, which is an extended version of the short note [1], we derive
Externí odkaz:
https://doaj.org/article/efe64b3a94ca44dd84d4d09a4d89e32f
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 8, Pp 1-30 (2019)
Abstract We apply the recently developped analytical methods for computing the boundary entropy, or the g-function, in integrable theories with non-diagonal scattering. We consider the particular case of the current-perturbed SU (2) k WZNW model with
Externí odkaz:
https://doaj.org/article/d299b124f0b74c0eae34054268a51f3e
Publikováno v:
Nuclear Physics B, Vol 949, Iss , Pp - (2019)
We derive a graph expansion for the thermal partition function of solvable two-dimensional models with boundaries. This expansion of the integration measure over the virtual particles winding around the time cycle is obtained with the help of the mat
Externí odkaz:
https://doaj.org/article/664fa93c012249528a626bcd85f3d46f
Publikováno v:
Science & Research (2019)
In this study, data about of the main indicators in spermograms - volume, concentration, motility, and deviations in sperm morphology of patients with reproductive problems were observed and analyzed. The correlation of these indicators with the age
Externí odkaz:
https://doaj.org/article/46afea7b685449218be430b1c9ed29e8