The Cyprus Institute

About: The Cyprus Institute is a other organization based out in Nicosia, Cyprus. It is known for research contribution in the topics: Aerosol & Environmental science. The organization has 418 authors who have published 1252 publications receiving 32586 citations.

Economic analysis of an electricity and desalinated water cogeneration plant in Cyprus.

Abstract: This paper builds on and extends the R&D work on the techno-economic analysis of the cogeneration of desalinated water and electricity by the Cyprus Institute (2012) (Solar Thermal Cogeneration of Electricity and Water: Research and Development study for a Concentrated Solar Power—Desalinization of Sea Water (CSP–DSW) C.N. Papanicolas & G. Tzamtzis editors. The Cyprus Institute, Nicosia, Cyprus, 2012. ISBN: 978-9963-2858-0-8). Three different Concentrated Solar Power (CSP) plant configuration options for operating in Cyprus are examined in this paper: an electricity-only, electricity with Reverse Osmosis desalination and electricity with Multi Effect-distillation desalination. All plants’ rated output is 4 MWe, and desalination capacity is 5,035 m3/d. A discounted cash flow model was developed and used, designed to represent the financial performance of the CSP–DSW concept. The expected financial costs for equipment, operation and maintenance and replacements were estimated. The expected performan...

Nucleon strange electromagnetic form factors

Abstract: We determine the strange electromagnetic form factors of the nucleon within the lattice formulation of quantum chromodynamics using simulations that include light, strange and charm quarks in the sea all tuned to their physical mass values. We employ state-of-the-art techniques to accurately extract the form factors for values of the momentum transfer square up to $0.8\text{ }\text{ }{\mathrm{GeV}}^{2}$. We find that both the electric and magnetic form factors are statistically nonzero. We obtain for the strange magnetic moment ${\ensuremath{\mu}}^{s}=\ensuremath{-}0.017(4){(}_{0}^{+1}){(}_{0}^{+5})$, the strange magnetic radius $⟨{r}_{M}^{2}{⟩}^{s}=\ensuremath{-}0.015(9){(}_{0}^{+3}){(}_{0}^{+4})\text{ }\text{ }{\mathrm{fm}}^{2}$, and the strange charge radius $⟨{r}_{E}^{2}{⟩}^{s}=\ensuremath{-}0.0048(6){(}_{\ensuremath{-}8}^{0}){(}_{0}^{+12})\text{ }\text{ }{\mathrm{fm}}^{2}$, where the first error is statistical, and the second and third systematic.

Thermal Rate Coefficients for the Astrochemical Process C + CH+ → C2+ + H by Ring Polymer Molecular Dynamics.

Abstract: Thermal rate coefficients for the astrochemical reaction C + CH+ → C2+ + H were computed in the temperature range 20–300 K by using novel rate theory based on ring polymer molecular dynamics (RPMD) on a recently published bond-order based potential energy surface and compared with previous Langevin capture model (LCM) and quasi-classical trajectory (QCT) calculations Results show that there is a significant discrepancy between the RPMD rate coefficients and the previous theoretical results that can lead to overestimation of the rate coefficients for the title reaction by several orders of magnitude at very low temperatures We argue that this can be attributed to a very challenging energy profile along the reaction coordinate for the title reaction, not taken into account in extenso by either the LCM or QCT approximation In the absence of any rigorous quantum mechanical or experimental results, the computed RPMD rate coefficients represent state-of-the-art estimates to be included in astrochemical datab

response of atmospheric composition to covid-19 lockdown measures during spring in the paris region (france)

Abstract: . since early 2020, the covid-19 pandemic has led to lockdowns at national scales. these lockdowns resulted in large cuts of atmospheric pollutant emissions, notably related to the vehicular traffic source where daily commuting of light-duty vehicles was almost completely stopped in numerous urban areas worldwide, especially during spring 2020. as a result, air quality changed in manners that are still currently under investigation. long-term in-situ monitoring of atmospheric composition provides, to this perspective, essential information. however, a robust quantitative assessment of the impact of lockdown measures on ambient concentrations is hindered by weather variability. basic comparisons with previous years may thus be flawed, especially regarding secondary pollutants, whose concentrations strongly depends on meteorological conditions. in order to circumvent this difficulty, an innovative methodology has been developed. the analog application for air quality (a3q) method is based on the comparison of each day of lockdown to a group of analog days having similar meteorological conditions. the a3q method has been successfully evaluated and applied to a comprehensive in-situ dataset of primary and secondary pollutants obtained at the sirta observatory, a suburban background site of the paris megacity (france). the overall slight decrease of pm1 concentrations (−14 %) compared to business-as-usual conditions conceals contrasting behaviours. primary traffic tracers (nox and traffic-related carbonaceous aerosols) dropped by 42–66 % during the lockdown period. further, the a3q method enabled us to characterize of changes triggered by nox decreases. particulate nitrate and secondary organic aerosols (soa), two of the main springtime aerosol components in north-western europe, decreased by −45 % and −25 %, respectively. a nox-relationship emphasizes the interest of nox mitigation policies at the regional (i.e. city) scale, although long-range pollution advection sporadically overcompensated regional decreases. variations of the oxidation state of soa suggests discrepancies in soa formation processes. at the same time, the expected ozone increase (+20 %) underlines the negative feedback of no titration. these results provide a quasi-comprehensive observation-based insight on mitigation policies regarding air quality in future low-carbon urban areas.