--- _id: '9305' abstract: - lang: eng text: Copper chalcogenides are outstanding thermoelectric materials for applications in the medium-high temperature range. Among different chalcogenides, while Cu2−xSe is characterized by higher thermoelectric figures of merit, Cu2−xS provides advantages in terms of low cost and element abundance. In the present work, we investigate the effect of different dopants to enhance the Cu2−xS performance and also its thermal stability. Among the tested options, Pb-doped Cu2−xS shows the highest improvement in stability against sulfur volatilization. Additionally, Pb incorporation allows tuning charge carrier concentration, which enables a significant improvement of the power factor. We demonstrate here that the introduction of an optimal additive amount of just 0.3% results in a threefold increase of the power factor in the middle-temperature range (500–800 K) and a record dimensionless thermoelectric figure of merit above 2 at 880 K. acknowledgement: This work was supported by the European Regional Development Fund and by the Spanish Ministerio de Economía y Competitividad through the project SEHTOP (ENE2016-77798-C4-3-R). MI acknowledges financial support from IST Austria. YL acknowledges funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 754411. YZ, CX, XW, KX and TZ thank the China Scholarship Council for the scholarship support. ICN2 acknowledges funding from Generalitat de Catalunya 2017 SGR 327 and the Spanish MINECO project ENE2017-85087-C3. ICN2 is supported by the Severo Ochoa program from the Spanish MINECO (grant no. SEV-2017-0706) and is funded by the CERCA program/Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autònoma de Barcelona Materials Science Ph.D. program. M.C.S. has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 754510 (PROBIST) and the Severo Ochoa programme. P.G. acknowledges financial support from the Spanish government (MICIU) through the RTI2018-102006-J-I00 project and the Catalan Agency of Competitiveness (ACCIO) through the TecnioSpring+ Marie Sklodowska-Curie action TECSPR16-1-0082. YZ and CX contributed equally to this work. article_number: '105991' article_processing_charge: No article_type: original author: - first_name: Yu full_name: Zhang, Yu last_name: Zhang - first_name: Congcong full_name: Xing, Congcong last_name: Xing - first_name: Yu full_name: Liu, Yu id: 2A70014E-F248-11E8-B48F-1D18A9856A87 last_name: Liu orcid: 0000-0001-7313-6740 - first_name: Maria Chiara full_name: Spadaro, Maria Chiara last_name: Spadaro - first_name: Xiang full_name: Wang, Xiang last_name: Wang - first_name: Mengyao full_name: Li, Mengyao last_name: Li - first_name: Ke full_name: Xiao, Ke last_name: Xiao - first_name: Ting full_name: Zhang, Ting last_name: Zhang - first_name: Pablo full_name: Guardia, Pablo last_name: Guardia - first_name: Khak Ho full_name: Lim, Khak Ho last_name: Lim - first_name: Ahmad Ostovari full_name: Moghaddam, Ahmad Ostovari last_name: Moghaddam - first_name: Jordi full_name: Llorca, Jordi last_name: Llorca - first_name: Jordi full_name: Arbiol, Jordi last_name: Arbiol - first_name: Maria full_name: Ibáñez, Maria id: 43C61214-F248-11E8-B48F-1D18A9856A87 last_name: Ibáñez orcid: 0000-0001-5013-2843 - first_name: Andreu full_name: Cabot, Andreu last_name: Cabot citation: ama: Zhang Y, Xing C, Liu Y, et al. Doping-mediated stabilization of copper vacancies to promote thermoelectric properties of Cu2-xS. Nano Energy. 2021;85(7). doi:10.1016/j.nanoen.2021.105991 apa: Zhang, Y., Xing, C., Liu, Y., Spadaro, M. C., Wang, X., Li, M., … Cabot, A. (2021). Doping-mediated stabilization of copper vacancies to promote thermoelectric properties of Cu2-xS. Nano Energy. Elsevier. https://doi.org/10.1016/j.nanoen.2021.105991 chicago: Zhang, Yu, Congcong Xing, Yu Liu, Maria Chiara Spadaro, Xiang Wang, Mengyao Li, Ke Xiao, et al. “Doping-Mediated Stabilization of Copper Vacancies to Promote Thermoelectric Properties of Cu2-XS.” Nano Energy. Elsevier, 2021. https://doi.org/10.1016/j.nanoen.2021.105991. ieee: Y. Zhang et al., “Doping-mediated stabilization of copper vacancies to promote thermoelectric properties of Cu2-xS,” Nano Energy, vol. 85, no. 7. Elsevier, 2021. ista: Zhang Y, Xing C, Liu Y, Spadaro MC, Wang X, Li M, Xiao K, Zhang T, Guardia P, Lim KH, Moghaddam AO, Llorca J, Arbiol J, Ibáñez M, Cabot A. 2021. Doping-mediated stabilization of copper vacancies to promote thermoelectric properties of Cu2-xS. Nano Energy. 85(7), 105991. mla: Zhang, Yu, et al. “Doping-Mediated Stabilization of Copper Vacancies to Promote Thermoelectric Properties of Cu2-XS.” Nano Energy, vol. 85, no. 7, 105991, Elsevier, 2021, doi:10.1016/j.nanoen.2021.105991. short: Y. Zhang, C. Xing, Y. Liu, M.C. Spadaro, X. Wang, M. Li, K. Xiao, T. Zhang, P. Guardia, K.H. Lim, A.O. Moghaddam, J. Llorca, J. Arbiol, M. Ibáñez, A. Cabot, Nano Energy 85 (2021). date_created: 2021-04-04T22:01:21Z date_published: 2021-07-01T00:00:00Z date_updated: 2023-09-27T07:41:00Z day: '01' department: - _id: MaIb doi: 10.1016/j.nanoen.2021.105991 ec_funded: 1 external_id: isi: - '000663442200004' intvolume: ' 85' isi: 1 issue: '7' language: - iso: eng main_file_link: - open_access: '1' url: https://ddd.uab.cat/record/271947 month: '07' oa: 1 oa_version: Submitted Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Nano Energy publication_identifier: issn: - 2211-2855 publication_status: published publisher: Elsevier quality_controlled: '1' scopus_import: '1' status: public title: Doping-mediated stabilization of copper vacancies to promote thermoelectric properties of Cu2-xS type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 85 year: '2021' ... --- _id: '9212' abstract: - lang: eng text: Plant fitness is largely dependent on the root, the underground organ, which, besides its anchoring function, supplies the plant body with water and all nutrients necessary for growth and development. To exploit the soil effectively, roots must constantly integrate environmental signals and react through adjustment of growth and development. Important components of the root management strategy involve a rapid modulation of the root growth kinetics and growth direction, as well as an increase of the root system radius through formation of lateral roots (LRs). At the molecular level, such a fascinating growth and developmental flexibility of root organ requires regulatory networks that guarantee stability of the developmental program but also allows integration of various environmental inputs. The plant hormone auxin is one of the principal endogenous regulators of root system architecture by controlling primary root growth and formation of LR. In this review, we discuss recent progress in understanding molecular networks where auxin is one of the main players shaping the root system and acting as mediator between endogenous cues and environmental factors. acknowledgement: We apologize to all the authors whose scientific work could not be cited and discussed because of space restrictions. We thank Dr. Inge Verstraeten (ISTAustria) and Dr. Juan Carlos Montesinos-Lopez (ETH Zürich) for helpful suggestions. This work was supported by the DOC Fellowship Programme of the Austrian Academy of Sciences (25008) to C.A. article_number: a039941 article_processing_charge: No article_type: original author: - first_name: Nicola full_name: Cavallari, Nicola id: 457160E6-F248-11E8-B48F-1D18A9856A87 last_name: Cavallari - first_name: Christina full_name: Artner, Christina id: 45DF286A-F248-11E8-B48F-1D18A9856A87 last_name: Artner - first_name: Eva full_name: Benková, Eva id: 38F4F166-F248-11E8-B48F-1D18A9856A87 last_name: Benková orcid: 0000-0002-8510-9739 citation: ama: Cavallari N, Artner C, Benková E. Auxin-regulated lateral root organogenesis. Cold Spring Harbor Perspectives in Biology. 2021;13(7). doi:10.1101/cshperspect.a039941 apa: Cavallari, N., Artner, C., & Benková, E. (2021). Auxin-regulated lateral root organogenesis. Cold Spring Harbor Perspectives in Biology. Cold Spring Harbor Laboratory Press. https://doi.org/10.1101/cshperspect.a039941 chicago: Cavallari, Nicola, Christina Artner, and Eva Benková. “Auxin-Regulated Lateral Root Organogenesis.” Cold Spring Harbor Perspectives in Biology. Cold Spring Harbor Laboratory Press, 2021. https://doi.org/10.1101/cshperspect.a039941. ieee: N. Cavallari, C. Artner, and E. Benková, “Auxin-regulated lateral root organogenesis,” Cold Spring Harbor Perspectives in Biology, vol. 13, no. 7. Cold Spring Harbor Laboratory Press, 2021. ista: Cavallari N, Artner C, Benková E. 2021. Auxin-regulated lateral root organogenesis. Cold Spring Harbor Perspectives in Biology. 13(7), a039941. mla: Cavallari, Nicola, et al. “Auxin-Regulated Lateral Root Organogenesis.” Cold Spring Harbor Perspectives in Biology, vol. 13, no. 7, a039941, Cold Spring Harbor Laboratory Press, 2021, doi:10.1101/cshperspect.a039941. short: N. Cavallari, C. Artner, E. Benková, Cold Spring Harbor Perspectives in Biology 13 (2021). date_created: 2021-03-01T10:08:32Z date_published: 2021-07-01T00:00:00Z date_updated: 2023-09-27T06:44:06Z day: '01' department: - _id: EvBe doi: 10.1101/cshperspect.a039941 external_id: isi: - '000692069100001' pmid: - '33558367' intvolume: ' 13' isi: 1 issue: '7' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1101/cshperspect.a039941 month: '07' oa: 1 oa_version: Published Version pmid: 1 project: - _id: 2685A872-B435-11E9-9278-68D0E5697425 name: Hormonal regulation of plant adaptive responses to environmental signals publication: Cold Spring Harbor Perspectives in Biology publication_identifier: issn: - 1943-0264 publication_status: published publisher: Cold Spring Harbor Laboratory Press quality_controlled: '1' scopus_import: '1' status: public title: Auxin-regulated lateral root organogenesis type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 13 year: '2021' ... --- _id: '9953' abstract: - lang: eng text: Chronic psychological stress is one of the most important triggers and environmental risk factors for neuropsychiatric disorders. Chronic stress can influence all organs via the secretion of stress hormones, including glucocorticoids by the adrenal glands, which coordinate the stress response across the body. In the brain, glucocorticoid receptors (GR) are expressed by various cell types including microglia, which are its resident immune cells regulating stress-induced inflammatory processes. To study the roles of microglial GR under normal homeostatic conditions and following chronic stress, we generated a mouse model in which the GR gene is depleted in microglia specifically at adulthood to prevent developmental confounds. We first confirmed that microglia were depleted in GR in our model in males and females among the cingulate cortex and the hippocampus, both stress-sensitive brain regions. Then, cohorts of microglial-GR depleted and wild-type (WT) adult female mice were housed for 3 weeks in a standard or stressful condition, using a chronic unpredictable mild stress (CUMS) paradigm. CUMS induced stress-related behavior in both microglial-GR depleted and WT animals as demonstrated by a decrease of both saccharine preference and progressive ratio breakpoint. Nevertheless, the hippocampal microglial and neural mechanisms underlying the adaptation to stress occurred differently between the two genotypes. Upon CUMS exposure, microglial morphology was altered in the WT controls, without any apparent effect in microglial-GR depleted mice. Furthermore, in the standard environment condition, GR depleted-microglia showed increased expression of pro-inflammatory genes, and genes involved in microglial homeostatic functions (such as Trem2, Cx3cr1 and Mertk). On the contrary, in CUMS condition, GR depleted-microglia showed reduced expression levels of pro-inflammatory genes and increased neuroprotective as well as anti-inflammatory genes compared to WT-microglia. Moreover, in microglial-GR depleted mice, but not in WT mice, CUMS led to a significant reduction of CA1 long-term potentiation and paired-pulse ratio. Lastly, differences in adult hippocampal neurogenesis were observed between the genotypes during normal homeostatic conditions, with microglial-GR deficiency increasing the formation of newborn neurons in the dentate gyrus subgranular zone independently from stress exposure. Together, these findings indicate that, although the deletion of microglial GR did not prevent the animal’s ability to respond to stress, it contributed to modulating hippocampal functions in both standard and stressful conditions, notably by shaping the microglial response to chronic stress. acknowledgement: We acknowledge that Université Laval stands on the traditional and unceded land of the Huron-Wendat peoples; and that the University of Victoria exists on the territory of the Lekwungen peoples and that the Songhees, Esquimalt and WSÁNEÆ peoples have relationships to this land. We thank Emmanuel Planel for the access to the epifluorescence microscope and Julie-Christine Lévesque at the Bioimaging Platform of CRCHU de Québec-Université Laval for technical assistance. We also thank the Centre for Advanced Materials and Related Technology for the access to the confocal microscope with Airyscan. K.P. was supported by a doctoral scholarship from Fonds de Recherche du Québec – Santé (FRQS), an excellence award from Fondation du CHU de Québec, as well as from Centre Thématique de Recherche en Neurosciences and from Fondation Famille-Choquette. K.B. was supported by excellence scholarships from Université Laval and Fondation du CHU de Québec. S.G. is supported by FIRC-AIRC fellowship for Italy 22329/2018 and by Pilot ARISLA NKINALS 2019. C.W.H. and J.C.S. were supported by postdoctoral fellowships from FRQS. This study was funded by a Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery grant (RGPIN-2014-05308) awarded to M.E.T., by ERANET neuron 2017 MicroSynDep to M.E.T. and I.B., and by the Italian Ministry of Health, grant RF-2018-12367249 to I.B, by PRIN 2017, AIRC 2019 and Ministero della Salute RF2018 to C.L. M.E.T. is a Tier II Canada Research Chair in Neurobiology of Aging and Cognition. article_processing_charge: No article_type: original author: - first_name: Katherine full_name: Picard, Katherine last_name: Picard - first_name: Kanchan full_name: Bisht, Kanchan last_name: Bisht - first_name: Silvia full_name: Poggini, Silvia last_name: Poggini - first_name: Stefano full_name: Garofalo, Stefano last_name: Garofalo - first_name: Maria Teresa full_name: Golia, Maria Teresa last_name: Golia - first_name: Bernadette full_name: Basilico, Bernadette id: 36035796-5ACA-11E9-A75E-7AF2E5697425 last_name: Basilico orcid: 0000-0003-1843-3173 - first_name: Fatima full_name: Abdallah, Fatima last_name: Abdallah - first_name: Naomi full_name: Ciano Albanese, Naomi last_name: Ciano Albanese - first_name: Irmgard full_name: Amrein, Irmgard last_name: Amrein - first_name: Nathalie full_name: Vernoux, Nathalie last_name: Vernoux - first_name: Kaushik full_name: Sharma, Kaushik last_name: Sharma - first_name: Chin Wai full_name: Hui, Chin Wai last_name: Hui - first_name: Julie full_name: C. Savage, Julie last_name: C. Savage - first_name: Cristina full_name: Limatola, Cristina last_name: Limatola - first_name: Davide full_name: Ragozzino, Davide last_name: Ragozzino - first_name: Laura full_name: Maggi, Laura last_name: Maggi - first_name: Igor full_name: Branchi, Igor last_name: Branchi - first_name: Marie Ève full_name: Tremblay, Marie Ève last_name: Tremblay citation: ama: Picard K, Bisht K, Poggini S, et al. Microglial-glucocorticoid receptor depletion alters the response of hippocampal microglia and neurons in a chronic unpredictable mild stress paradigm in female mice. Brain, Behavior, and Immunity. 2021;97:423-439. doi:10.1016/j.bbi.2021.07.022 apa: Picard, K., Bisht, K., Poggini, S., Garofalo, S., Golia, M. T., Basilico, B., … Tremblay, M. È. (2021). Microglial-glucocorticoid receptor depletion alters the response of hippocampal microglia and neurons in a chronic unpredictable mild stress paradigm in female mice. Brain, Behavior, and Immunity. Elsevier. https://doi.org/10.1016/j.bbi.2021.07.022 chicago: Picard, Katherine, Kanchan Bisht, Silvia Poggini, Stefano Garofalo, Maria Teresa Golia, Bernadette Basilico, Fatima Abdallah, et al. “Microglial-Glucocorticoid Receptor Depletion Alters the Response of Hippocampal Microglia and Neurons in a Chronic Unpredictable Mild Stress Paradigm in Female Mice.” Brain, Behavior, and Immunity. Elsevier, 2021. https://doi.org/10.1016/j.bbi.2021.07.022. ieee: K. Picard et al., “Microglial-glucocorticoid receptor depletion alters the response of hippocampal microglia and neurons in a chronic unpredictable mild stress paradigm in female mice,” Brain, Behavior, and Immunity, vol. 97. Elsevier, pp. 423–439, 2021. ista: Picard K, Bisht K, Poggini S, Garofalo S, Golia MT, Basilico B, Abdallah F, Ciano Albanese N, Amrein I, Vernoux N, Sharma K, Hui CW, C. Savage J, Limatola C, Ragozzino D, Maggi L, Branchi I, Tremblay MÈ. 2021. Microglial-glucocorticoid receptor depletion alters the response of hippocampal microglia and neurons in a chronic unpredictable mild stress paradigm in female mice. Brain, Behavior, and Immunity. 97, 423–439. mla: Picard, Katherine, et al. “Microglial-Glucocorticoid Receptor Depletion Alters the Response of Hippocampal Microglia and Neurons in a Chronic Unpredictable Mild Stress Paradigm in Female Mice.” Brain, Behavior, and Immunity, vol. 97, Elsevier, 2021, pp. 423–39, doi:10.1016/j.bbi.2021.07.022. short: K. Picard, K. Bisht, S. Poggini, S. Garofalo, M.T. Golia, B. Basilico, F. Abdallah, N. Ciano Albanese, I. Amrein, N. Vernoux, K. Sharma, C.W. Hui, J. C. Savage, C. Limatola, D. Ragozzino, L. Maggi, I. Branchi, M.È. Tremblay, Brain, Behavior, and Immunity 97 (2021) 423–439. date_created: 2021-08-22T22:01:21Z date_published: 2021-10-01T00:00:00Z date_updated: 2023-10-03T09:49:18Z day: '01' department: - _id: GaNo doi: 10.1016/j.bbi.2021.07.022 external_id: isi: - '000702878400007' pmid: - '34343616' intvolume: ' 97' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://www.zora.uzh.ch/id/eprint/208855/1/ZORA208855.pdf month: '10' oa: 1 oa_version: Submitted Version page: 423-439 pmid: 1 publication: Brain, Behavior, and Immunity publication_identifier: issn: - 0889-1591 publication_status: published publisher: Elsevier quality_controlled: '1' scopus_import: '1' status: public title: Microglial-glucocorticoid receptor depletion alters the response of hippocampal microglia and neurons in a chronic unpredictable mild stress paradigm in female mice type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 97 year: '2021' ... --- _id: '10327' abstract: - lang: eng text: Composite materials offer numerous advantages in a wide range of applications, including thermoelectrics. Here, semiconductor–metal composites are produced by just blending nanoparticles of a sulfide semiconductor obtained in aqueous solution and at room temperature with a metallic Cu powder. The obtained blend is annealed in a reducing atmosphere and afterward consolidated into dense polycrystalline pellets through spark plasma sintering (SPS). We observe that, during the annealing process, the presence of metallic copper activates a partial reduction of the PbS, resulting in the formation of PbS–Pb–CuxS composites. The presence of metallic lead during the SPS process habilitates the liquid-phase sintering of the composite. Besides, by comparing the transport properties of PbS, the PbS–Pb–CuxS composites, and PbS–CuxS composites obtained by blending PbS and CuxS nanoparticles, we demonstrate that the presence of metallic lead decisively contributes to a strong increase of the charge carrier concentration through spillover of charge carriers enabled by the low work function of lead. The increase in charge carrier concentration translates into much higher electrical conductivities and moderately lower Seebeck coefficients. These properties translate into power factors up to 2.1 mW m–1 K–2 at ambient temperature, well above those of PbS and PbS + CuxS. Additionally, the presence of multiple phases in the final composite results in a notable decrease in the lattice thermal conductivity. Overall, the introduction of metallic copper in the initial blend results in a significant improvement of the thermoelectric performance of PbS, reaching a dimensionless thermoelectric figure of merit ZT = 1.1 at 750 K, which represents about a 400% increase over bare PbS. Besides, an average ZTave = 0.72 in the temperature range 320–773 K is demonstrated. acknowledgement: This work was supported by the European Regional Development Funds. M.L., Y.Z., X.H., and K.X. thank the China Scholarship Council for scholarship support. M. I. has been financially supported by IST Austria and the Werner Siemens Foundation. Y.L. acknowledges funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 754411. J.L. is a Serra Húnter fellow and is grateful to ICREA Academia program and projects MICINN/FEDER RTI2018-093996-B-C31 and GC 2017 SGR 128. ICN2 acknowledges funding from Generalitat de Catalunya 2017 SGR 327 and the Spanish MINECO project NANOGEN (PID2020-116093RB-C43). ICN2 was supported by the Severo Ochoa program from Spanish MINECO (grant no. SEV-2017-0706) and was funded by the CERCA Programme/Generalitat de Catalunya. X.H. thanks China Scholarship Council for scholarship support (201804910551). Part of the present work was performed in the framework of Universitat Autònoma de Barcelona Materials Science Ph.D. program. article_processing_charge: No article_type: original author: - first_name: Mengyao full_name: Li, Mengyao last_name: Li - first_name: Yu full_name: Liu, Yu id: 2A70014E-F248-11E8-B48F-1D18A9856A87 last_name: Liu orcid: 0000-0001-7313-6740 - first_name: Yu full_name: Zhang, Yu last_name: Zhang - first_name: Xu full_name: Han, Xu last_name: Han - first_name: Ke full_name: Xiao, Ke last_name: Xiao - first_name: Mehran full_name: Nabahat, Mehran last_name: Nabahat - first_name: Jordi full_name: Arbiol, Jordi last_name: Arbiol - first_name: Jordi full_name: Llorca, Jordi last_name: Llorca - first_name: Maria full_name: Ibáñez, Maria id: 43C61214-F248-11E8-B48F-1D18A9856A87 last_name: Ibáñez orcid: 0000-0001-5013-2843 - first_name: Andreu full_name: Cabot, Andreu last_name: Cabot citation: ama: Li M, Liu Y, Zhang Y, et al. PbS–Pb–CuxS composites for thermoelectric application. ACS Applied Materials and Interfaces. 2021;13(43):51373–51382. doi:10.1021/acsami.1c15609 apa: Li, M., Liu, Y., Zhang, Y., Han, X., Xiao, K., Nabahat, M., … Cabot, A. (2021). PbS–Pb–CuxS composites for thermoelectric application. ACS Applied Materials and Interfaces. American Chemical Society . https://doi.org/10.1021/acsami.1c15609 chicago: Li, Mengyao, Yu Liu, Yu Zhang, Xu Han, Ke Xiao, Mehran Nabahat, Jordi Arbiol, Jordi Llorca, Maria Ibáñez, and Andreu Cabot. “PbS–Pb–CuxS Composites for Thermoelectric Application.” ACS Applied Materials and Interfaces. American Chemical Society , 2021. https://doi.org/10.1021/acsami.1c15609. ieee: M. Li et al., “PbS–Pb–CuxS composites for thermoelectric application,” ACS Applied Materials and Interfaces, vol. 13, no. 43. American Chemical Society , pp. 51373–51382, 2021. ista: Li M, Liu Y, Zhang Y, Han X, Xiao K, Nabahat M, Arbiol J, Llorca J, Ibáñez M, Cabot A. 2021. PbS–Pb–CuxS composites for thermoelectric application. ACS Applied Materials and Interfaces. 13(43), 51373–51382. mla: Li, Mengyao, et al. “PbS–Pb–CuxS Composites for Thermoelectric Application.” ACS Applied Materials and Interfaces, vol. 13, no. 43, American Chemical Society , 2021, pp. 51373–51382, doi:10.1021/acsami.1c15609. short: M. Li, Y. Liu, Y. Zhang, X. Han, K. Xiao, M. Nabahat, J. Arbiol, J. Llorca, M. Ibáñez, A. Cabot, ACS Applied Materials and Interfaces 13 (2021) 51373–51382. date_created: 2021-11-21T23:01:30Z date_published: 2021-10-19T00:00:00Z date_updated: 2023-10-03T09:55:33Z day: '19' department: - _id: MaIb doi: 10.1021/acsami.1c15609 ec_funded: 1 external_id: isi: - '000715852100070' pmid: - '34665616' intvolume: ' 13' isi: 1 issue: '43' keyword: - CuxS - PbS - energy conversion - nanocomposite - nanoparticle - solution synthesis - thermoelectric language: - iso: eng main_file_link: - open_access: '1' url: https://upcommons.upc.edu/bitstream/2117/363528/1/Pb%20mengyao.pdf month: '10' oa: 1 oa_version: Submitted Version page: 51373–51382 pmid: 1 project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships - _id: 9B8F7476-BA93-11EA-9121-9846C619BF3A name: 'HighTE: The Werner Siemens Laboratory for the High Throughput Discovery of Semiconductors for Waste Heat Recovery' publication: ACS Applied Materials and Interfaces publication_identifier: eissn: - 1944-8252 issn: - 1944-8244 publication_status: published publisher: 'American Chemical Society ' quality_controlled: '1' scopus_import: '1' status: public title: PbS–Pb–CuxS composites for thermoelectric application type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 13 year: '2021' ... --- _id: '9235' abstract: - lang: eng text: Cu2–xS has become one of the most promising thermoelectric materials for application in the middle-high temperature range. Its advantages include the abundance, low cost, and safety of its elements and a high performance at relatively elevated temperatures. However, stability issues limit its operation current and temperature, thus calling for the optimization of the material performance in the middle temperature range. Here, we present a synthetic protocol for large scale production of covellite CuS nanoparticles at ambient temperature and atmosphere, and using water as a solvent. The crystal phase and stoichiometry of the particles are afterward tuned through an annealing process at a moderate temperature under inert or reducing atmosphere. While annealing under argon results in Cu1.8S nanopowder with a rhombohedral crystal phase, annealing in an atmosphere containing hydrogen leads to tetragonal Cu1.96S. High temperature X-ray diffraction analysis shows the material annealed in argon to transform to the cubic phase at ca. 400 K, while the material annealed in the presence of hydrogen undergoes two phase transitions, first to hexagonal and then to the cubic structure. The annealing atmosphere, temperature, and time allow adjustment of the density of copper vacancies and thus tuning of the charge carrier concentration and material transport properties. In this direction, the material annealed under Ar is characterized by higher electrical conductivities but lower Seebeck coefficients than the material annealed in the presence of hydrogen. By optimizing the charge carrier concentration through the annealing time, Cu2–xS with record figures of merit in the middle temperature range, up to 1.41 at 710 K, is obtained. We finally demonstrate that this strategy, based on a low-cost and scalable solution synthesis process, is also suitable for the production of high performance Cu2–xS layers using high throughput and cost-effective printing technologies. acknowledgement: This work was supported by the European Regional Development Funds. M.Y.L., X.H., T.Z., and K.X. thank the China Scholarship Council for scholarship support. M.I. acknowledges financial support from IST Austria. J.L. acknowledges support from the National Natural Science Foundation of China (No. 22008091), the funding for scientific research startup of Jiangsu University (No. 19JDG044), and Jiangsu Provincial Program for High-Level Innovative and Entrepreneurial Talents Introduction. J.L. is a Serra Húnter fellow and is grateful to the ICREA Academia program and projects MICINN/FEDER RTI2018-093996-B-C31 and GC 2017 SGR 128. ICN2 acknowledges funding from Generalitat de Catalunya 2017 SGR 327 and the Spanish MINECO ENE2017-85087-C3. ICN2 is supported by the Severo Ochoa program from Spanish MINECO (Grant No. SEV-2017-0706) and is funded by the CERCA Programme/Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autònoma de Barcelona Materials Science PhD program. T.Z. has received funding from the CSC-UAB PhD scholarship program. article_processing_charge: No article_type: original author: - first_name: Mengyao full_name: Li, Mengyao last_name: Li - first_name: Yu full_name: Liu, Yu id: 2A70014E-F248-11E8-B48F-1D18A9856A87 last_name: Liu orcid: 0000-0001-7313-6740 - first_name: Yu full_name: Zhang, Yu last_name: Zhang - first_name: Xu full_name: Han, Xu last_name: Han - first_name: Ting full_name: Zhang, Ting last_name: Zhang - first_name: Yong full_name: Zuo, Yong last_name: Zuo - first_name: Chenyang full_name: Xie, Chenyang last_name: Xie - first_name: Ke full_name: Xiao, Ke last_name: Xiao - first_name: Jordi full_name: Arbiol, Jordi last_name: Arbiol - first_name: Jordi full_name: Llorca, Jordi last_name: Llorca - first_name: Maria full_name: Ibáñez, Maria id: 43C61214-F248-11E8-B48F-1D18A9856A87 last_name: Ibáñez orcid: 0000-0001-5013-2843 - first_name: Junfeng full_name: Liu, Junfeng last_name: Liu - first_name: Andreu full_name: Cabot, Andreu last_name: Cabot citation: ama: Li M, Liu Y, Zhang Y, et al. Effect of the annealing atmosphere on crystal phase and thermoelectric properties of copper sulfide. ACS Nano. 2021;15(3):4967–4978. doi:10.1021/acsnano.0c09866 apa: Li, M., Liu, Y., Zhang, Y., Han, X., Zhang, T., Zuo, Y., … Cabot, A. (2021). Effect of the annealing atmosphere on crystal phase and thermoelectric properties of copper sulfide. ACS Nano. American Chemical Society . https://doi.org/10.1021/acsnano.0c09866 chicago: Li, Mengyao, Yu Liu, Yu Zhang, Xu Han, Ting Zhang, Yong Zuo, Chenyang Xie, et al. “Effect of the Annealing Atmosphere on Crystal Phase and Thermoelectric Properties of Copper Sulfide.” ACS Nano. American Chemical Society , 2021. https://doi.org/10.1021/acsnano.0c09866. ieee: M. Li et al., “Effect of the annealing atmosphere on crystal phase and thermoelectric properties of copper sulfide,” ACS Nano, vol. 15, no. 3. American Chemical Society , pp. 4967–4978, 2021. ista: Li M, Liu Y, Zhang Y, Han X, Zhang T, Zuo Y, Xie C, Xiao K, Arbiol J, Llorca J, Ibáñez M, Liu J, Cabot A. 2021. Effect of the annealing atmosphere on crystal phase and thermoelectric properties of copper sulfide. ACS Nano. 15(3), 4967–4978. mla: Li, Mengyao, et al. “Effect of the Annealing Atmosphere on Crystal Phase and Thermoelectric Properties of Copper Sulfide.” ACS Nano, vol. 15, no. 3, American Chemical Society , 2021, pp. 4967–4978, doi:10.1021/acsnano.0c09866. short: M. Li, Y. Liu, Y. Zhang, X. Han, T. Zhang, Y. Zuo, C. Xie, K. Xiao, J. Arbiol, J. Llorca, M. Ibáñez, J. Liu, A. Cabot, ACS Nano 15 (2021) 4967–4978. date_created: 2021-03-10T20:12:45Z date_published: 2021-03-01T00:00:00Z date_updated: 2023-10-03T09:59:55Z day: '01' department: - _id: MaIb doi: 10.1021/acsnano.0c09866 external_id: isi: - '000634569100106' pmid: - '33645986' intvolume: ' 15' isi: 1 issue: '3' keyword: - General Engineering - General Physics and Astronomy - General Materials Science language: - iso: eng main_file_link: - open_access: '1' url: https://upcommons.upc.edu/bitstream/handle/2117/363528/Pb%20mengyao.pdf?sequence=1&isAllowed=y month: '03' oa: 1 oa_version: Submitted Version page: 4967–4978 pmid: 1 publication: ACS Nano publication_identifier: eissn: - 1936-086X issn: - 1936-0851 publication_status: published publisher: 'American Chemical Society ' quality_controlled: '1' scopus_import: '1' status: public title: Effect of the annealing atmosphere on crystal phase and thermoelectric properties of copper sulfide type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 15 year: '2021' ... --- _id: '10204' abstract: - lang: eng text: Two common representations of close packings of identical spheres consisting of hexagonal layers, called Barlow stackings, appear abundantly in minerals and metals. These motifs, however, occupy an identical portion of space and bear identical first-order topological signatures as measured by persistent homology. Here we present a novel method based on k-fold covers that unambiguously distinguishes between these patterns. Moreover, our approach provides topological evidence that the FCC motif is the more stable of the two in the context of evolving experimental sphere packings during the transition from disordered to an ordered state. We conclude that our approach can be generalised to distinguish between various Barlow stackings manifested in minerals and metals. acknowledgement: MS acknowledges the support by Australian Research Council funding through the ARC Training Centre for M3D Innovation (IC180100008). MS thanks M. Hanifpour and N. Francois for their input and valuable discussions. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme, grant no. 788183 and from the Wittgenstein Prize, Austrian Science Fund (FWF), grant no. Z 342-N31. article_processing_charge: No article_type: original author: - first_name: Georg F full_name: Osang, Georg F id: 464B40D6-F248-11E8-B48F-1D18A9856A87 last_name: Osang orcid: 0000-0002-8882-5116 - first_name: Herbert full_name: Edelsbrunner, Herbert id: 3FB178DA-F248-11E8-B48F-1D18A9856A87 last_name: Edelsbrunner orcid: 0000-0002-9823-6833 - first_name: Mohammad full_name: Saadatfar, Mohammad last_name: Saadatfar citation: ama: Osang GF, Edelsbrunner H, Saadatfar M. Topological signatures and stability of hexagonal close packing and Barlow stackings. Soft Matter. 2021;17(40):9107-9115. doi:10.1039/d1sm00774b apa: Osang, G. F., Edelsbrunner, H., & Saadatfar, M. (2021). Topological signatures and stability of hexagonal close packing and Barlow stackings. Soft Matter. Royal Society of Chemistry . https://doi.org/10.1039/d1sm00774b chicago: Osang, Georg F, Herbert Edelsbrunner, and Mohammad Saadatfar. “Topological Signatures and Stability of Hexagonal Close Packing and Barlow Stackings.” Soft Matter. Royal Society of Chemistry , 2021. https://doi.org/10.1039/d1sm00774b. ieee: G. F. Osang, H. Edelsbrunner, and M. Saadatfar, “Topological signatures and stability of hexagonal close packing and Barlow stackings,” Soft Matter, vol. 17, no. 40. Royal Society of Chemistry , pp. 9107–9115, 2021. ista: Osang GF, Edelsbrunner H, Saadatfar M. 2021. Topological signatures and stability of hexagonal close packing and Barlow stackings. Soft Matter. 17(40), 9107–9115. mla: Osang, Georg F., et al. “Topological Signatures and Stability of Hexagonal Close Packing and Barlow Stackings.” Soft Matter, vol. 17, no. 40, Royal Society of Chemistry , 2021, pp. 9107–15, doi:10.1039/d1sm00774b. short: G.F. Osang, H. Edelsbrunner, M. Saadatfar, Soft Matter 17 (2021) 9107–9115. date_created: 2021-10-31T23:01:30Z date_published: 2021-10-20T00:00:00Z date_updated: 2023-10-03T09:24:27Z day: '20' ddc: - '540' department: - _id: HeEd doi: 10.1039/d1sm00774b ec_funded: 1 external_id: isi: - '000700090000001' pmid: - '34569592' file: - access_level: open_access checksum: b4da0c420530295e61b153960f6cb350 content_type: application/pdf creator: dernst date_created: 2023-10-03T09:21:42Z date_updated: 2023-10-03T09:21:42Z file_id: '14385' file_name: 2021_SoftMatter_acceptedversion_Osang.pdf file_size: 4678788 relation: main_file success: 1 file_date_updated: 2023-10-03T09:21:42Z has_accepted_license: '1' intvolume: ' 17' isi: 1 issue: '40' language: - iso: eng month: '10' oa: 1 oa_version: Submitted Version page: 9107-9115 pmid: 1 project: - _id: 266A2E9E-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '788183' name: Alpha Shape Theory Extended - _id: 268116B8-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: Z00342 name: The Wittgenstein Prize publication: Soft Matter publication_identifier: eissn: - 1744-6848 issn: - 1744-683X publication_status: published publisher: 'Royal Society of Chemistry ' quality_controlled: '1' scopus_import: '1' status: public title: Topological signatures and stability of hexagonal close packing and Barlow stackings type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 17 year: '2021' ... --- _id: '9605' abstract: - lang: eng text: 'Given a finite set A ⊂ ℝ^d, let Cov_{r,k} denote the set of all points within distance r to at least k points of A. Allowing r and k to vary, we obtain a 2-parameter family of spaces that grow larger when r increases or k decreases, called the multicover bifiltration. Motivated by the problem of computing the homology of this bifiltration, we introduce two closely related combinatorial bifiltrations, one polyhedral and the other simplicial, which are both topologically equivalent to the multicover bifiltration and far smaller than a Čech-based model considered in prior work of Sheehy. Our polyhedral construction is a bifiltration of the rhomboid tiling of Edelsbrunner and Osang, and can be efficiently computed using a variant of an algorithm given by these authors as well. Using an implementation for dimension 2 and 3, we provide experimental results. Our simplicial construction is useful for understanding the polyhedral construction and proving its correctness. ' acknowledgement: The authors want to thank the reviewers for many helpful comments and suggestions. alternative_title: - LIPIcs article_number: '27' article_processing_charge: No author: - first_name: René full_name: Corbet, René last_name: Corbet - first_name: Michael full_name: Kerber, Michael last_name: Kerber - first_name: Michael full_name: Lesnick, Michael last_name: Lesnick - first_name: Georg F full_name: Osang, Georg F id: 464B40D6-F248-11E8-B48F-1D18A9856A87 last_name: Osang orcid: 0000-0002-8882-5116 citation: ama: 'Corbet R, Kerber M, Lesnick M, Osang GF. Computing the multicover bifiltration. In: Leibniz International Proceedings in Informatics. Vol 189. Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2021. doi:10.4230/LIPIcs.SoCG.2021.27' apa: 'Corbet, R., Kerber, M., Lesnick, M., & Osang, G. F. (2021). Computing the multicover bifiltration. In Leibniz International Proceedings in Informatics (Vol. 189). Online: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. https://doi.org/10.4230/LIPIcs.SoCG.2021.27' chicago: Corbet, René, Michael Kerber, Michael Lesnick, and Georg F Osang. “Computing the Multicover Bifiltration.” In Leibniz International Proceedings in Informatics, Vol. 189. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021. https://doi.org/10.4230/LIPIcs.SoCG.2021.27. ieee: R. Corbet, M. Kerber, M. Lesnick, and G. F. Osang, “Computing the multicover bifiltration,” in Leibniz International Proceedings in Informatics, Online, 2021, vol. 189. ista: 'Corbet R, Kerber M, Lesnick M, Osang GF. 2021. Computing the multicover bifiltration. Leibniz International Proceedings in Informatics. SoCG: International Symposium on Computational Geometry, LIPIcs, vol. 189, 27.' mla: Corbet, René, et al. “Computing the Multicover Bifiltration.” Leibniz International Proceedings in Informatics, vol. 189, 27, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021, doi:10.4230/LIPIcs.SoCG.2021.27. short: R. Corbet, M. Kerber, M. Lesnick, G.F. Osang, in:, Leibniz International Proceedings in Informatics, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021. conference: end_date: 2021-06-11 location: Online name: 'SoCG: International Symposium on Computational Geometry' start_date: 2021-06-07 date_created: 2021-06-27T22:01:49Z date_published: 2021-06-02T00:00:00Z date_updated: 2023-10-04T12:03:39Z day: '02' ddc: - '516' department: - _id: HeEd doi: 10.4230/LIPIcs.SoCG.2021.27 external_id: arxiv: - '2103.07823' file: - access_level: open_access checksum: 0de217501e7ba8b267d58deed0d51761 content_type: application/pdf creator: cziletti date_created: 2021-06-28T12:40:47Z date_updated: 2021-06-28T12:40:47Z file_id: '9610' file_name: 2021_LIPIcs_Corbet.pdf file_size: '1367983' relation: main_file success: 1 file_date_updated: 2021-06-28T12:40:47Z has_accepted_license: '1' intvolume: ' 189' language: - iso: eng month: '06' oa: 1 oa_version: Published Version publication: Leibniz International Proceedings in Informatics publication_identifier: isbn: - '9783959771849' issn: - '18688969' publication_status: published publisher: Schloss Dagstuhl - Leibniz-Zentrum für Informatik quality_controlled: '1' related_material: link: - relation: extended_version url: https://arxiv.org/abs/2103.07823 record: - id: '12709' relation: later_version status: public scopus_import: '1' status: public title: Computing the multicover bifiltration tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: conference user_id: D865714E-FA4E-11E9-B85B-F5C5E5697425 volume: 189 year: '2021' ... --- _id: '9441' abstract: - lang: eng text: "Isomanifolds are the generalization of isosurfaces to arbitrary dimension and codimension, i.e. submanifolds of ℝ^d defined as the zero set of some multivariate multivalued smooth function f: ℝ^d → ℝ^{d-n}, where n is the intrinsic dimension of the manifold. A natural way to approximate a smooth isomanifold M is to consider its Piecewise-Linear (PL) approximation M̂ based on a triangulation \U0001D4AF of the ambient space ℝ^d. In this paper, we describe a simple algorithm to trace isomanifolds from a given starting point. The algorithm works for arbitrary dimensions n and d, and any precision D. Our main result is that, when f (or M) has bounded complexity, the complexity of the algorithm is polynomial in d and δ = 1/D (and unavoidably exponential in n). Since it is known that for δ = Ω (d^{2.5}), M̂ is O(D²)-close and isotopic to M, our algorithm produces a faithful PL-approximation of isomanifolds of bounded complexity in time polynomial in d. Combining this algorithm with dimensionality reduction techniques, the dependency on d in the size of M̂ can be completely removed with high probability. We also show that the algorithm can handle isomanifolds with boundary and, more generally, isostratifolds. The algorithm for isomanifolds with boundary has been implemented and experimental results are reported, showing that it is practical and can handle cases that are far ahead of the state-of-the-art. " acknowledgement: We thank Dominique Attali, Guilherme de Fonseca, Arijit Ghosh, Vincent Pilaud and Aurélien Alvarez for their comments and suggestions. We also acknowledge the reviewers. alternative_title: - LIPIcs article_processing_charge: No author: - first_name: Jean-Daniel full_name: Boissonnat, Jean-Daniel last_name: Boissonnat - first_name: Siargey full_name: Kachanovich, Siargey last_name: Kachanovich - first_name: Mathijs full_name: Wintraecken, Mathijs id: 307CFBC8-F248-11E8-B48F-1D18A9856A87 last_name: Wintraecken orcid: 0000-0002-7472-2220 citation: ama: 'Boissonnat J-D, Kachanovich S, Wintraecken M. Tracing isomanifolds in Rd in time polynomial in d using Coxeter-Freudenthal-Kuhn triangulations. In: 37th International Symposium on Computational Geometry (SoCG 2021). Vol 189. Leibniz International Proceedings in Informatics (LIPIcs). Dagstuhl, Germany: Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2021:17:1-17:16. doi:10.4230/LIPIcs.SoCG.2021.17' apa: 'Boissonnat, J.-D., Kachanovich, S., & Wintraecken, M. (2021). Tracing isomanifolds in Rd in time polynomial in d using Coxeter-Freudenthal-Kuhn triangulations. In 37th International Symposium on Computational Geometry (SoCG 2021) (Vol. 189, p. 17:1-17:16). Dagstuhl, Germany: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. https://doi.org/10.4230/LIPIcs.SoCG.2021.17' chicago: 'Boissonnat, Jean-Daniel, Siargey Kachanovich, and Mathijs Wintraecken. “Tracing Isomanifolds in Rd in Time Polynomial in d Using Coxeter-Freudenthal-Kuhn Triangulations.” In 37th International Symposium on Computational Geometry (SoCG 2021), 189:17:1-17:16. Leibniz International Proceedings in Informatics (LIPIcs). Dagstuhl, Germany: Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021. https://doi.org/10.4230/LIPIcs.SoCG.2021.17.' ieee: J.-D. Boissonnat, S. Kachanovich, and M. Wintraecken, “Tracing isomanifolds in Rd in time polynomial in d using Coxeter-Freudenthal-Kuhn triangulations,” in 37th International Symposium on Computational Geometry (SoCG 2021), Virtual, 2021, vol. 189, p. 17:1-17:16. ista: 'Boissonnat J-D, Kachanovich S, Wintraecken M. 2021. Tracing isomanifolds in Rd in time polynomial in d using Coxeter-Freudenthal-Kuhn triangulations. 37th International Symposium on Computational Geometry (SoCG 2021). SoCG: Symposium on Computational GeometryLeibniz International Proceedings in Informatics (LIPIcs), LIPIcs, vol. 189, 17:1-17:16.' mla: Boissonnat, Jean-Daniel, et al. “Tracing Isomanifolds in Rd in Time Polynomial in d Using Coxeter-Freudenthal-Kuhn Triangulations.” 37th International Symposium on Computational Geometry (SoCG 2021), vol. 189, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021, p. 17:1-17:16, doi:10.4230/LIPIcs.SoCG.2021.17. short: J.-D. Boissonnat, S. Kachanovich, M. Wintraecken, in:, 37th International Symposium on Computational Geometry (SoCG 2021), Schloss Dagstuhl - Leibniz-Zentrum für Informatik, Dagstuhl, Germany, 2021, p. 17:1-17:16. conference: end_date: 2021-06-11 location: Virtual name: 'SoCG: Symposium on Computational Geometry' start_date: 2021-06-07 date_created: 2021-06-02T10:10:55Z date_published: 2021-06-02T00:00:00Z date_updated: 2023-10-10T07:34:34Z day: '02' ddc: - '005' - '516' - '514' department: - _id: HeEd doi: 10.4230/LIPIcs.SoCG.2021.17 ec_funded: 1 file: - access_level: open_access checksum: c322aa48d5d35a35877896cc565705b6 content_type: application/pdf creator: mwintrae date_created: 2021-06-02T10:22:33Z date_updated: 2021-06-02T10:22:33Z file_id: '9442' file_name: LIPIcs-SoCG-2021-17.pdf file_size: 1972902 relation: main_file success: 1 file_date_updated: 2021-06-02T10:22:33Z has_accepted_license: '1' intvolume: ' 189' language: - iso: eng month: '06' oa: 1 oa_version: Published Version page: 17:1-17:16 place: Dagstuhl, Germany project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: 37th International Symposium on Computational Geometry (SoCG 2021) publication_identifier: isbn: - 978-3-95977-184-9 issn: - 1868-8969 publication_status: published publisher: Schloss Dagstuhl - Leibniz-Zentrum für Informatik quality_controlled: '1' related_material: record: - id: '12960' relation: later_version status: public series_title: Leibniz International Proceedings in Informatics (LIPIcs) status: public title: Tracing isomanifolds in Rd in time polynomial in d using Coxeter-Freudenthal-Kuhn triangulations tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: conference user_id: D865714E-FA4E-11E9-B85B-F5C5E5697425 volume: 189 year: '2021' ... --- _id: '9393' abstract: - lang: eng text: "We consider the core algorithmic problems related to verification of systems with respect to three classical quantitative properties, namely, the mean-payoff, the ratio, and the minimum initial credit for energy property. The algorithmic problem given a graph and a quantitative property asks to compute the optimal value (the infimum value over all traces) from every node of the graph. We consider graphs with bounded treewidth—a class that contains the control flow graphs of most programs. Let n denote the number of nodes of a graph, m the number of edges (for bounded treewidth \U0001D45A=\U0001D442(\U0001D45B)) and W the largest absolute value of the weights. Our main theoretical results are as follows. First, for the minimum initial credit problem we show that (1) for general graphs the problem can be solved in \U0001D442(\U0001D45B2⋅\U0001D45A) time and the associated decision problem in \U0001D442(\U0001D45B⋅\U0001D45A) time, improving the previous known \U0001D442(\U0001D45B3⋅\U0001D45A⋅log(\U0001D45B⋅\U0001D44A)) and \U0001D442(\U0001D45B2⋅\U0001D45A) bounds, respectively; and (2) for bounded treewidth graphs we present an algorithm that requires \U0001D442(\U0001D45B⋅log\U0001D45B) time. Second, for bounded treewidth graphs we present an algorithm that approximates the mean-payoff value within a factor of 1+\U0001D716 in time \U0001D442(\U0001D45B⋅log(\U0001D45B/\U0001D716)) as compared to the classical exact algorithms on general graphs that require quadratic time. Third, for the ratio property we present an algorithm that for bounded treewidth graphs works in time \U0001D442(\U0001D45B⋅log(|\U0001D44E⋅\U0001D44F|))=\U0001D442(\U0001D45B⋅log(\U0001D45B⋅\U0001D44A)), when the output is \U0001D44E\U0001D44F, as compared to the previously best known algorithm on general graphs with running time \U0001D442(\U0001D45B2⋅log(\U0001D45B⋅\U0001D44A)). We have implemented some of our algorithms and show that they present a significant speedup on standard benchmarks." acknowledgement: 'The research was partly supported by Austrian Science Fund (FWF) Grant No P23499- N23, FWF NFN Grant No S11407-N23 (RiSE/SHiNE), ERC Start Grant (279307: Graph Games), and Microsoft faculty fellows award.' article_processing_charge: No article_type: original author: - first_name: Krishnendu full_name: Chatterjee, Krishnendu id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87 last_name: Chatterjee orcid: 0000-0002-4561-241X - first_name: Rasmus full_name: Ibsen-Jensen, Rasmus id: 3B699956-F248-11E8-B48F-1D18A9856A87 last_name: Ibsen-Jensen orcid: 0000-0003-4783-0389 - first_name: Andreas full_name: Pavlogiannis, Andreas id: 49704004-F248-11E8-B48F-1D18A9856A87 last_name: Pavlogiannis orcid: 0000-0002-8943-0722 citation: ama: Chatterjee K, Ibsen-Jensen R, Pavlogiannis A. Faster algorithms for quantitative verification in bounded treewidth graphs. Formal Methods in System Design. 2021;57:401-428. doi:10.1007/s10703-021-00373-5 apa: Chatterjee, K., Ibsen-Jensen, R., & Pavlogiannis, A. (2021). Faster algorithms for quantitative verification in bounded treewidth graphs. Formal Methods in System Design. Springer. https://doi.org/10.1007/s10703-021-00373-5 chicago: Chatterjee, Krishnendu, Rasmus Ibsen-Jensen, and Andreas Pavlogiannis. “Faster Algorithms for Quantitative Verification in Bounded Treewidth Graphs.” Formal Methods in System Design. Springer, 2021. https://doi.org/10.1007/s10703-021-00373-5. ieee: K. Chatterjee, R. Ibsen-Jensen, and A. Pavlogiannis, “Faster algorithms for quantitative verification in bounded treewidth graphs,” Formal Methods in System Design, vol. 57. Springer, pp. 401–428, 2021. ista: Chatterjee K, Ibsen-Jensen R, Pavlogiannis A. 2021. Faster algorithms for quantitative verification in bounded treewidth graphs. Formal Methods in System Design. 57, 401–428. mla: Chatterjee, Krishnendu, et al. “Faster Algorithms for Quantitative Verification in Bounded Treewidth Graphs.” Formal Methods in System Design, vol. 57, Springer, 2021, pp. 401–28, doi:10.1007/s10703-021-00373-5. short: K. Chatterjee, R. Ibsen-Jensen, A. Pavlogiannis, Formal Methods in System Design 57 (2021) 401–428. date_created: 2021-05-16T22:01:47Z date_published: 2021-09-01T00:00:00Z date_updated: 2023-10-10T11:13:20Z day: '01' department: - _id: KrCh doi: 10.1007/s10703-021-00373-5 ec_funded: 1 external_id: arxiv: - '1504.07384' isi: - '000645490300001' intvolume: ' 57' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1504.07384 month: '09' oa: 1 oa_version: Preprint page: 401-428 project: - _id: 2584A770-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P 23499-N23 name: Modern Graph Algorithmic Techniques in Formal Verification - _id: 25832EC2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S 11407_N23 name: Rigorous Systems Engineering - _id: 2581B60A-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '279307' name: 'Quantitative Graph Games: Theory and Applications' - _id: 2587B514-B435-11E9-9278-68D0E5697425 name: Microsoft Research Faculty Fellowship publication: Formal Methods in System Design publication_identifier: eissn: - 1572-8102 issn: - 0925-9856 publication_status: published publisher: Springer quality_controlled: '1' scopus_import: '1' status: public title: Faster algorithms for quantitative verification in bounded treewidth graphs type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 57 year: '2021' ... --- _id: '10365' abstract: - lang: eng text: The early development of many organisms involves the folding of cell monolayers, but this behaviour is difficult to reproduce in vitro; therefore, both mechanistic causes and effects of local curvature remain unclear. Here we study epithelial cell monolayers on corrugated hydrogels engineered into wavy patterns, examining how concave and convex curvatures affect cellular and nuclear shape. We find that substrate curvature affects monolayer thickness, which is larger in valleys than crests. We show that this feature generically arises in a vertex model, leading to the hypothesis that cells may sense curvature by modifying the thickness of the tissue. We find that local curvature also affects nuclear morphology and positioning, which we explain by extending the vertex model to take into account membrane–nucleus interactions, encoding thickness modulation in changes to nuclear deformation and position. We propose that curvature governs the spatial distribution of yes-associated proteins via nuclear shape and density changes. We show that curvature also induces significant variations in lamins, chromatin condensation and cell proliferation rate in folded epithelial tissues. Together, this work identifies active cell mechanics and nuclear mechanoadaptation as the key players of the mechanistic regulation of epithelia to substrate curvature. acknowledgement: S.G. acknowledges funding from FEDER Prostem Research Project no. 1510614 (Wallonia DG06), F.R.S.-FNRS Epiforce Research Project no. T.0092.21 and Interreg MAT(T)ISSE project, which is financially supported by Interreg France-Wallonie-Vlaanderen (Fonds Européen de Développement Régional, FEDER-ERDF). This project was supported by the European Research Council under the European Union’s Horizon 2020 Research and Innovation Programme grant agreement 851288 (to E.H.), and by the Austrian Science Fund (FWF) (P 31639; to E.H.). L.R.M. acknowledges funding from the Agence National de la Recherche (ANR), as part of the ‘Investments d’Avenir’ Programme (I-SITE ULNE/ANR-16-IDEX-0004 ULNE). This work benefited from ANR-10-EQPX-04-01 and FEDER 12001407 grants to F.L. W.D.V. is supported by the Research Foundation Flanders (FWO 1516619N, FWO GOO5819N, FWO I003420N, FWO IRI I000321N) and is member of the Research Excellence Consortium µNEURO at the University of Antwerp. M.L. is financially supported by FRIA (F.R.S.-FNRS). M.S. is a Senior Research Associate of the Fund for Scientific Research (F.R.S.-FNRS) and acknowledges EOS grant no. 30650939 (PRECISION). Sketches in Figs. 1a and 5e and Extended Data Fig. 9 were drawn by C. Levicek. article_processing_charge: No article_type: original author: - first_name: Marine full_name: Luciano, Marine last_name: Luciano - first_name: Shi-lei full_name: Xue, Shi-lei id: 31D2C804-F248-11E8-B48F-1D18A9856A87 last_name: Xue - first_name: Winnok H. full_name: De Vos, Winnok H. last_name: De Vos - first_name: Lorena full_name: Redondo-Morata, Lorena last_name: Redondo-Morata - first_name: Mathieu full_name: Surin, Mathieu last_name: Surin - first_name: Frank full_name: Lafont, Frank last_name: Lafont - first_name: Edouard B full_name: Hannezo, Edouard B id: 3A9DB764-F248-11E8-B48F-1D18A9856A87 last_name: Hannezo orcid: 0000-0001-6005-1561 - first_name: Sylvain full_name: Gabriele, Sylvain last_name: Gabriele citation: ama: Luciano M, Xue S, De Vos WH, et al. Cell monolayers sense curvature by exploiting active mechanics and nuclear mechanoadaptation. Nature Physics. 2021;17(12):1382–1390. doi:10.1038/s41567-021-01374-1 apa: Luciano, M., Xue, S., De Vos, W. H., Redondo-Morata, L., Surin, M., Lafont, F., … Gabriele, S. (2021). Cell monolayers sense curvature by exploiting active mechanics and nuclear mechanoadaptation. Nature Physics. Springer Nature. https://doi.org/10.1038/s41567-021-01374-1 chicago: Luciano, Marine, Shi-lei Xue, Winnok H. De Vos, Lorena Redondo-Morata, Mathieu Surin, Frank Lafont, Edouard B Hannezo, and Sylvain Gabriele. “Cell Monolayers Sense Curvature by Exploiting Active Mechanics and Nuclear Mechanoadaptation.” Nature Physics. Springer Nature, 2021. https://doi.org/10.1038/s41567-021-01374-1. ieee: M. Luciano et al., “Cell monolayers sense curvature by exploiting active mechanics and nuclear mechanoadaptation,” Nature Physics, vol. 17, no. 12. Springer Nature, pp. 1382–1390, 2021. ista: Luciano M, Xue S, De Vos WH, Redondo-Morata L, Surin M, Lafont F, Hannezo EB, Gabriele S. 2021. Cell monolayers sense curvature by exploiting active mechanics and nuclear mechanoadaptation. Nature Physics. 17(12), 1382–1390. mla: Luciano, Marine, et al. “Cell Monolayers Sense Curvature by Exploiting Active Mechanics and Nuclear Mechanoadaptation.” Nature Physics, vol. 17, no. 12, Springer Nature, 2021, pp. 1382–1390, doi:10.1038/s41567-021-01374-1. short: M. Luciano, S. Xue, W.H. De Vos, L. Redondo-Morata, M. Surin, F. Lafont, E.B. Hannezo, S. Gabriele, Nature Physics 17 (2021) 1382–1390. date_created: 2021-11-28T23:01:29Z date_published: 2021-11-18T00:00:00Z date_updated: 2023-10-16T06:31:54Z day: '18' ddc: - '530' department: - _id: EdHa doi: 10.1038/s41567-021-01374-1 ec_funded: 1 external_id: isi: - '000720204300004' file: - access_level: open_access checksum: 5d6d76750a71d7cb632bb15417c38ef7 content_type: application/pdf creator: channezo date_created: 2023-10-11T09:31:43Z date_updated: 2023-10-11T09:31:43Z file_id: '14420' file_name: 50145_4_merged_1630498627.pdf file_size: 40285498 relation: main_file success: 1 file_date_updated: 2023-10-11T09:31:43Z has_accepted_license: '1' intvolume: ' 17' isi: 1 issue: '12' language: - iso: eng month: '11' oa: 1 oa_version: Submitted Version page: 1382–1390 project: - _id: 05943252-7A3F-11EA-A408-12923DDC885E call_identifier: H2020 grant_number: '851288' name: Design Principles of Branching Morphogenesis - _id: 268294B6-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P31639 name: Active mechano-chemical description of the cell cytoskeleton publication: Nature Physics publication_identifier: eissn: - 1745-2481 issn: - 1745-2473 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: link: - description: News on IST Webpage relation: press_release url: https://ist.ac.at/en/news/how-cells-feel-curvature/ scopus_import: '1' status: public title: Cell monolayers sense curvature by exploiting active mechanics and nuclear mechanoadaptation type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 17 year: '2021' ...