| 1. |
- Bondarenko, Alexander, et al.
(author)
-
Overview of Touché 2022 : Argument Retrieval
- 2022
-
In: Experimental IR Meets Multilinguality, Multimodality, and Interaction (CLEF 2022). - Cham : Springer Nature. - 9783031136436 - 9783031136429 ; , s. 311-336
-
Conference paper (peer-reviewed)abstract
- This paper is a condensed report on the third year of the Touche lab on argument retrieval held at CLEF 2022. With the goal to foster and support the development of technologies for argument mining and argument analysis, we organized three shared tasks in the third edition of Touche: (a) argument retrieval for controversial topics, where participants retrieve a gist of arguments from a collection of online debates, (b) argument retrieval for comparative questions, where participants retrieve argumentative passages from a generic web crawl, and (c) image retrieval for arguments, where participants retrieve images from a focused web crawl that show support or opposition to some stance.
|
|
| 2. |
- Petäjä, Tuukka, et al.
(author)
-
Overview : Integrative and Comprehensive Understanding on Polar Environments (iCUPE) - concept and initial results
- 2020
-
In: Atmospheric Chemistry And Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 20:14, s. 8551-8592
-
Journal article (peer-reviewed)abstract
- The role of polar regions is increasing in terms of megatrends such as globalization, new transport routes, demography, and the use of natural resources with consequent effects on regional and transported pollutant concentrations. We set up the ERA-PLANET Strand 4 project iCUPE - integrative and Comprehensive Understanding on Polar Environments to provide novel insights and observational data on global grand challenges with an Arctic focus. We utilize an integrated approach combining in situ observations, satellite remote sensing Earth observations (EOs), and multi-scale modeling to synthesize data from comprehensive long-term measurements, intensive campaigns, and satellites to deliver data products, metrics, and indicators to stakeholders concerning the environmental status, availability, and extraction of natural resources in the polar areas. The iCUPE work consists of thematic state-of-the-art research and the provision of novel data in atmospheric pollution, local sources and transboundary transport, the characterization of arctic surfaces and their changes, an assessment of the concentrations and impacts of heavy metals and persistent organic pollutants and their cycling, the quantification of emissions from natural resource extraction, and the validation and optimization of satellite Earth observation (EO) data streams. In this paper we introduce the iCUPE project and summarize initial results arising out of the integration of comprehensive in situ observations, satellite remote sensing, and multi-scale modeling in the Arctic context.
|
|
| 3. |
- Skuodis, Eigirdas, et al.
(author)
-
Very sensitive probes for quantitative and organoleptic detection of oxygen based on conformer-induced room-temperature phosphorescence enhancement of the derivative of triazatruxene and phenothiazine
- 2022
-
In: Sensors and actuators. B, Chemical. - : Elsevier. - 0925-4005 .- 1873-3077. ; 373
-
Journal article (peer-reviewed)abstract
- Organic materials which show room-temperature phosphorescence (RTP) are of interest for many applications including chemical qubits which are the core units of a quantum information systems, organic light emitting diodes, chemical sensors. In contrast to triplet emitters based on noble metals (e.g. Ir, Rh), quantum yields of RTP of noble-atom-free organic emitters are much lower than unity. In this work, we report on a new approach to conformer-induced RTP enhancement of organic triplet emitters. The synthesis, thermal, photophysical, chargetransporting and oxygen sensing properties of the derivative of phenothiazine and triazatriazatruxene in which phenothiazine moieties are linked to nitrogen atoms of triazatriazatruxene via C-2 positions are presented. This compound exhibit stable RTP with a quantum yield of 54% which is more than six times higher than that of a reference material. For 1% solid solution of the compound in Zeonex, the ratio of intensity of RTP observed under vacuum and fluorescence intensity recorded in air reached the value of 19 which allows quantitative detection of oxygen with the high Stern-Volmer quenching constant of 7.83 x 10(-3) ppm(-1). The observed change of emission colour depending on the oxygen concentration can be used for the simple detection of oxygen by human eye.
|
|
| 4. |
- Volyniuk, Lesia, et al.
(author)
-
Single-Molecular White Emission of Organic Thianthrene-Based Luminophores Exhibiting Efficient Fluorescence and Room Temperature Phosphorescence Induced by Halogen Atoms
- 2023
-
In: ACS Sustainable Chemistry and Engineering. - : American Chemical Society (ACS). - 2168-0485. ; 11:48, s. 16914-16925
-
Journal article (peer-reviewed)abstract
- Because of the contradiction of the efficiencies of fluorescence (FL) and room temperature phosphorescence (RTP) under ambient conditions, achievement of the molecular design of efficient monomolecular white emission resulting from the overlapping of FL and RTP is attractive but very challenging. With the aim of obtaining efficient white emission from a single organic molecule, phenyl-(thianthren-2-yl)-methanone and its tan derivatives with halogen atoms are developed. Single-molecular white emitters are investigated by experimental and theoretical approaches including steady-state and time-resolved spectroscopy, X-ray analyses, and density functional theory calculations. Photoluminescence quantum yields (PLQYs) of white emission of the molecular dispersion of phenyl-(thianthren-2-yl)-methanone in the rigid host ZEONEX at room temperature are significantly enhanced from 19 to 84% after the removal of oxygen. Based on the results of X-ray analysis of the single crystal, the high PLQY values are partly attributed to the absence of pi-pi intermolecular interactions and the low number of weak van der Waals intermolecular stacking due to the strong bending of heterocyclic thianthrene moiety and the high dihedral angle between thianthrene and benzoyl groups. The structural peculiarities of the newly synthesized thianthrene derivatives may result in the development of even more efficient organic monomolecular white emitters.
|
|
| 5. |
|
|
