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Nonlinear polaritons in a monolayer semiconductor coupled to optical bound states in the continuum

Light(Science & Applications) 2020年第1期9卷 1480-1487页

作者： Vasily Kravtsov Ekaterina Khestanova Fedor A.Benimetskiy Tatiana ivanova Anton K.Samusev ivan S.Sinev Dmitry Pidgayko Alexey m.mozharov ivan S.mukhin maksim S.Lozhkin Yuri V.Kapitonov Andrey S.Brichkin Vladimir D.Kulakovskii ivan A.Shelykh Alexander I.Tartakovskii Paul m.Walker maurice S.Skolnick Dmitry N.Krizhanovskii ivan V.Iorsh ITmO University Saint Petersburg 197101Russia St.Petersburg Academic University Saint Petersburg 194021Russia Saint Petersburg State University ul.Ulyanovskaya 1Saint Petersburg 198504Russia Institute of Solid State Physics RASChernogolovka 142432Russia Science Institute University of IcelandDunhagi 3IS-107ReykjavikIceland Department of Physics and Astronomy University of SheffieldSheffield S37RHUK

Optical bound states in the continuum(BICs)provide a way to engineer very narrow resonances in photonic *** extended interaction time in these systems is particularly promising for the enhancement of nonlinear optical processes and the development of the next generation of active optical ***,the achievable interaction strength is limited by the purely photonic character of optical ***,we mix the optical BIC in a photonic crystal slab with excitons in the atomically thin semiconductor moSe_(2) to form nonlinear exciton-polaritons with a Rabi splitting of 27 meV,exhibiting large interaction-induced spectral *** asymptotic BIC-like suppression of polariton radiation into the far field toward the BIC wavevector,in combination with effective reduction of the excitonic disorder through motional narrowing,results in small polariton linewidths below 3 *** with a strongly wavevector-dependent Q-factor,this provides for the enhancement and control of polariton–polariton interactions and the resulting nonlinear optical effects,paving the way toward tuneable BIC-based polaritonic devices for sensing,lasing,and nonlinear optics.

关键词： polar nonlinear continuum

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A geomorphological model of susceptibility to the effect of human interventions for environmental licensing determination(SHIELD)

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Geoscience Frontiers 2022年第2期13卷 284-294页

作者： Cristina I.Pereira Celene B.milanes ivan Correa Enzo Pranzini Benjamin Cuker Camilo m.Botero EAFIT University Earth Sciences DepartmentMedellínColombia Coastal Systems Research Group Playas Corporation Ltda.BogotáColombia Civil and Environmental Department Universidad De La CostaBarranquillaColombia Department of Earth Sciences University of FlorenceFirenzeItaly Department of marine and Environmental Science Hampton UniversityHamptonUnited States University Sergio Arboleda School of LawSanta

Almost every country requires some form of environmental licensing prior to the inception of development projects that may affect the integrity of the environment and its social *** developed a new conceptual and methodological model to instruct the assessment of the potential impacts posed by proposed *** to Human Interventions for Environmental Licensing Determination(SHIELD)includes a novel geomorphological interpretation of the Environmental Impact Assessment(EIA).It considers the impact of human interventions on geomorphological processes and landscape functioning in the context of the entire ecosystem,going further than the classical concept of *** susceptibility of the site informs the screening stage,allowing local conditions to help define the criteria used in the ***,the level of detail of the environmental baseline is scoped by considering the degree of disturbance of natural processes posed by human *** this geomorphological susceptibility model on different kinds of environments would allow shifting the environmental licensing practices from the prevailing anthropocentric and static conception of the environment towards an Ecosystem *** addresses the need to improve the screening and scoping stages that form the basis of the rest of any *** introduces several innovations to EIA including the incorporation of fuzzy logic,a preassembled database of contributions form experts,and a shifting of emphasis from the type of proposed intervention to the type of environment and its relative susceptibility.

关键词： Processes and landforms Expert knowledge Ecosystem approach Screening Scoping

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Electrofishing method improves evaluation of amphibian larvae abundance:a case of“beaver rivers”

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Integrative Zoology 2017年第4期12卷 345-350页

作者： Yury Y.DGEBUADZE ivan V.BASHINSKIY Severtsov Institute of Ecology&Evolution Leninsky ProspectMoscowRussia

There are many locations in Russia where Eurasian beaver(Castor fiber)populations have been *** a keystone species,beavers provide wide-ranging direct and indirect impacts on aquatic *** particular,beaver-created ponds are sites for spawning and nursery places for tadpoles of the brown frogs(genus Rana).Because of such impacts,study techniques for assessing aquatic organism abundance are being *** compared two methods for estimating tadpole abundance:traditional catches by dipnet and *** results show that the dipnet catch data for the shallower ponds with larger water surface area were five times lower than that obtained by ***,we conclude that dipnet catches are not suitable for comparing the relative abundance of tadpoles in the two beaver ponds that were studied.

关键词： abundance of tadpoles beaver ponds Rana

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Abundance and spatial dynamics of bacterioplankton in the Seven Rila Lakes,Bulgaria

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Chinese Journal of Oceanology and Limnology 2010年第3期28卷 451-458页

作者： Silvena BOTEVA ivan TRAYKOV Anelia KENAROVA Valentin BOGOEV Biology Faculty Sofia University"St. Kliment Ohridski"8 Dragan Tzankov Blvd. 1611 Sofia Bulgaria

In the high mountain oligotrophic Seven Rila Lakes (2 095–2 535 m a.s.l.) bacterial abundance was recorded in July and September 2006. In July, bacterial abundance (average (3.32±2.5)×105 cell/ml) in the lakes correlated negatively with elevation, while in September (average (26.39±7.1)×105 cell/ml) this pattern was altered and the greatest abundance of bacteria occurred at the highest ((39.05±1.5)×105 cell/ml) and the lowest ((30.63±6.0)×105 cell/ml) elevated lakes. Regression analyses suggested that the principal factor controlling bacterial abundance, in both July and September, was inorganic nitrogen (NO3-N and NH4-N; R2=0.70, Pmajor regulating factors were temperature (R2=0.66, Pmber. All factors, except NO3-N, had a positive effect on bacterial abundance.

关键词： bacterial abundance high mountain lake Rila mountain environmental factor bottom-up control

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Diabetes mellitus type 2 as an underlying,comorbid or consequent state of mental disorders

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World Journal of Diabetes 2023年第5期14卷 481-493页

作者： milica m Borovcanin Katarina Vesic Ivica Petrovic ivan P Jovanovic Natasa R mijailovic Department of Psychiatry Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Department of Neurology Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Department of Pathophysiology Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Center for molecular medicine and Stem Cell Research Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Department of Pharmacy Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia

Somatic disturbances that occur in parallel with psychiatric diseases are a major challenge in clinical *** factors contribute to the development of mental and somatic *** 2 diabetes mellitus(T2Dm)is a significant health burden worldwide,and the prevalence of diabetes in adults is *** comorbidity of diabetes and mental disorders is very *** sharing a bidirectional link,both T2Dm and mental disorders influence each other in various manners,but the exact mechanisms underlying this link are not yet *** potential mechanisms of both mental disorders and T2Dm are related to immune and inflammatory system dysfunction,oxidative stress,endothelial dysfunction,and metabolic ***,diabetes is also a risk factor for cognitive dysfunction that can range from subtle diabetesassociated cognitive decline to pre-dementia and dementia.A complex relationship between the gut and the brain also represents a new therapeutic approach since gut-brain signalling pathways regulate food intake and hepatic glucose *** aim of this minireview is to summarize and present the latest data on mutual pathogenic pathways in these disorders,emphasizing their complexity and *** also focused on the cognitive performances and changes in neurodegenerative *** importance of implementing integrated approaches in treating both of these states is highlighted,along with the need for individual therapeutic strategies.

关键词： Diabetes mellitus type 2 mental disorders Neuroinflammation Neurodegeneration Cognition

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Uremic Bleeding in 2 Patients with Dieulafoy’s Lesion: Case Report and Literature Review

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Open Journal of Gastroenterology 2024年第5期14卷 167-173页

作者： Gustavo Adolfo Hernández Valdez Diana Estefanía Ibarra García Juan Antonio Contreras Escamilla Janette Alejandra Gamiño Gutierrez Francisco manuel Tonatiuh Carrillo Beltran Ulises Solis Gomez Jocelyn Nataly Quintero meléndez ivan Alejandro medina Jimenez marco Antonio González Villar Jorge Rojas morales Department of Internal medicine ISSSTE APP General Hospital of Tepic Tepic Nayarit Mexico Hospital Civil de Guadalajara Fray Antonio Alcalde Guadalajara Jalisco M&#233xico

Dieulafoy’s lesions are rare vascular malformations of the gastrointestinal tract. A Dieulafoy’s lesion is an aberrant vessel that does not reduce in caliber when it extends from the submucosa to the mucosa. Damage to this artery can cause severe and intermittent arterial bleeding from small vascular stumps that are difficult to visualize. Furthermore, these catastrophic bleeding episodes frequently result in hemodynamic instability and the need for transfusion of multiple blood products. Recently, uremic syndrome has been identified as a risk factor for gastric mucosal lesions. We present two clinical cases of acute digestive bleeding due to Dielafoy lesion with chronic kidney disease as the main cause, where two different therapies were performed endoscopically. We concluded with the results of our patients that the best therapy was the application of the hemostatic hemoclip on the injury vs the injection with adrenaline on the wound site. Uremia is identified as a risk factor for upper gastrointestinal bleeding in patients with pre-existing Dieulafoy’s lesion, as well as a higher incidence of new bleeding.

关键词： Dieulafoy’s Lesion Gastrointestinal Bleeding Endoscopy Endoscopy Hemostatic Clips Kidney Disease Adrenaline Thermal Coagulation Dieulafoy

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Acute necrotizing pancreatitis as fi rst manifestation of primary hyperparathyroidism

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World Journal of Gastroenterology 2010年第23期16卷 2959-2962页

作者： Jeroen I Lenz Jimmy m Jacobs Bart Op de Beeck ivan A Huyghe Paul A Pelckmans Tom G moreels Division of Gastroenterology and Hepatology Antwerp University Hospital Division of Radiology Antwerp University Hospital Division of Nuclear medicine Antwerp University Hospital

We report the case of a female patient with severe acute necrotizing pancreatitis associated with hypercalcemia as first manifestation of primary hyperparathyroidism caused by a benign parathyroid *** the acute pancreatitis was treated *** patient subsequently underwent surgical resection of the parathyroid adenoma and surgical clearance of a large infected pancreatic *** the association of parathyroid adenoma-induced hypercalcemia and acute pancreatitis is a known medical entity,it is very *** pathophysiology of hypercalcemia-induced acute pancreatitis is therefore not well known,although some mechanisms have been *** is important to treat the provoking ***,the cause of hypercalcemia should be identif ied *** resection of the parathyroid adenoma is the ultimate therapy.

关键词： Acute necrotizing pancreatitis Hypercalcemia Primary hyperparathyroidism Parathyroid adenoma

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Semiotic Proposition for Understanding Semantics Within Construction Documents

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Tsinghua Science and Technology 2008年第S1期13卷 192-198页

作者： ivan mutis Raja R. A. Issa Department of Construction Science Texas A & M University College Station School of Building Construction University of Florida

This research develops a methodology that helps actors in understanding information generated from multiple construction participants. It employs semiotic theory which approaches the interpreter’s understanding of the role of the representations used in construction documents to communicate meanings to other participants. This strategy is designed to aid the interpreters’ comprehension of the use of symbols. The symbols within the construction documents are forms of representations that take the form of a visual representation of a set of markers that describe a formal language, and of markers that are used to represent natural language as well as other possible representations, such as a collection of codes for indexing documents. Symbols are replaced by signs under the semiotics theory. The use of symbols as signs is this study’s recognition of the relationship between the interpreter and the material quality of symbols. The semiotic analysis is an examination of the compromise between the meanings of a representation per se and the concept associated with the understanding of such representation.

关键词： semiotics construction representation semantic forms ontology categories

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Engineering of immunoinstructive extracellular matrices for enhanced osteoinductivity

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Bioactive materials 2023年第6期24卷 174-184页

作者： Andrés García-García Sébastien Pigeot ivan martin Department of Biomedicine University Hospital BaselUniversity of Basel4031BaselSwitzerland Department of Biomedical Engineering University of Basel4123AllschwillSwitzerland

The increasing recognition of the contribution of the immune system to activate and prime regeneration implies that tissue engineering strategies and biomaterials design should target regulation of early immunological *** previously proposed the cell-based engineering and devitalization of extracellular matrices(ECms)as a strategy to generate implant materials delivering custom-defined ***,in the context of bone regeneration,we aimed at enhancing the osteoinductivity of such ECms by enriching their immunomodulatory factors *** with IL1βa cell line overexpressing BmP-2 enabled engineering of ECms preserving osteoinductive signals and containing larger amounts of angiogenic(VEGF)and pro-inflammatory molecules(IL6,IL8 and mCP1).Upon implantation,these IL1β-induced materials enhanced processes typical of the inflammatory phase(e.g.,vascular invasion,osteoclast recruitment and differentiation),leading to‘regenerative’events(e.g.,m2 macrophage polarization)and ultimately resulting in faster and more efficient bone *** results bear relevance towards the manufacturing of potent off-the-shelf osteoinductive materials and outline the broader paradigm of engineering immunoinstructive implants to enhance tissue regeneration.

关键词： Immunomodulation Bone tissue engineering Inflammation Hypertrophic cartilage matrices Osteoinduction

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Charge disproportionation and site-selective local magnetic moments in the post-perovskite-type Fe_(2)O_(3) under ultra-high pressures

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npj Computational materials 2019年第1期5卷 345-351页

作者： ivan Leonov Gregory Kh.Rozenberg Igor A.Abrikosov m.N.miheev Institute of metal Physics Russian Academy of Sciences620137 YekaterinburgRussia materials modeling and Development Laboratory National University of Science and Technology‘MISIS’119049 MoscowRussia School of Physics and Astronomy Tel Aviv University69978 Tel AvivIsrael Department of Physics Chemistry and Biology(IFM)Linköping UniversitySE-58183 LinköpingSweden

The archetypal 3d mott insulator hematite,Fe_(2)O_(3),is one of the basic oxide components playing an important role in mineralogy of Earth’s lower *** high pressure-temperature behavior,such as the electronic properties,equation of state,and phase stability is of fundamental importance for understanding the properties and evolution of the Earth’s ***,we study the electronic structure,magnetic state,and lattice stability of Fe_(2)O_(3)at ultra-high pressures using the density functional plus dynamical mean-field theory(DFT+DmFT)*** the vicinity of a mott transition,Fe_(2)O_(3) is found to exhibit a series of complex electronic,magnetic,and structural *** particular,it makes a phase transition to a metal with a post-perovskite crystal structure and site-selective local moments upon compression above 75 *** show that the site-selective phase transition is accompanied by a charge disproportionation of Fe ions,with Fe^(3±δ)and δ~0.05–0.09,implying a complex interplay between electronic correlations and the *** results suggest that site-selective local moments in Fe_(2)O_(3) persist up to ultra-high pressures of~200–250 GPa,i.e.,sufficiently above the core-mantle *** latter can have important consequences for understanding of the velocity and density anomalies in the Earth’s lower mantle.

关键词： magnetic local high

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