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Articles de revues sur le sujet « Fibered topos »

Auteur : Grafiati

Publié le 2 juin 2025

Mis à jour le 31 juillet 2025

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1

Rogers, Carson. "Cosmetic two‐strand twists on fibered knots." Journal of Topology 13, no. 4 (2020): 1388–408. http://dx.doi.org/10.1112/topo.12164.

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Cengiz, Mustafa. "Heegaard genus and complexity of fibered knots." Journal of Topology 15, no. 4 (2022): 2389–425. http://dx.doi.org/10.1112/topo.12268.

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Kastenholz, Thorben, and Jens Reinhold. "Simplicial volume and essentiality of manifolds fibered over spheres." Journal of Topology 16, no. 1 (2023): 192–206. http://dx.doi.org/10.1112/topo.12286.

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Toto, Saktioto, Ramadhan Khaikal, Soerbakti Yan, Fadli Syahputra Romi, Irawan Dedi, and Okfalisa. "Apodization sensor performance for TOPAS fiber Bragg grating." TELKOMNIKA (Telecommunication, Computing, Electronics and Control) 19, no. 6 (2021): 1982–91. https://doi.org/10.12928/telkomnika.v19i6.21669.

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Optical sensors have more capabilities than electronic sensors, and therefore provide extraordinary developments, including high sensitivity, non-susceptibility to electromagnetic wave disturbances, small size, and multiplexing. Furthermore, fiber Bragg grating (FBG) is an optical sensor with a periodically changing grating refractive index, susceptible to strain and temperature changes. As a sensor, FBG’s performance required to optimize and improve the numerical apodization function and affect the effective refractive index is considered. The grating fiber’s apodization function

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Nielsen, Kristian, Henrik K. Rasmussen, Aurèle J. Adam, Paul C. Planken, Ole Bang, and Peter U. Jepsen. "Bendable, low-loss Topas fibers for the terahertz frequency range." Optics Express 17, no. 10 (2009): 8592. http://dx.doi.org/10.1364/oe.17.008592.

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Lekili, Yankı, and Kazushi Ueda. "Homological mirror symmetry for Milnor fibers via moduli of A∞$A_\infty$‐structures." Journal of Topology 15, no. 3 (2022): 1058–106. http://dx.doi.org/10.1112/topo.12248.

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Hua, Zheng, and Alexander Polishchuk. "Elliptic bihamiltonian structures from relative shifted Poisson structures." Journal of Topology 16, no. 4 (2023): 1389–422. http://dx.doi.org/10.1112/topo.12315.

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AbstractIn this paper, generalizing our previous construction, we equip the relative moduli stack of complexes over a Calabi–Yau fibration (possibly with singular fibers) with a shifted Poisson structure. Applying this construction to the anticanonical linear systems on surfaces, we get examples of compatible Poisson brackets on projective spaces extending Feigin–Odesskii Poisson brackets. Computing explicitly the corresponding compatible brackets coming from Hirzebruch surfaces, we recover the brackets defined by Odesskii–Wolf.

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Emiliyanov, Grigoriy, Poul Høiby, Lars Pedersen, and Ole Bang. "Selective Serial Multi-Antibody Biosensing with TOPAS Microstructured Polymer Optical Fibers." Sensors 13, no. 3 (2013): 3242–51. http://dx.doi.org/10.3390/s130303242.

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BARBOT, THIERRY, and SÉRGIO R. FENLEY. "Classification and rigidity of totally periodic pseudo-Anosov flows in graph manifolds." Ergodic Theory and Dynamical Systems 35, no. 6 (2014): 1681–722. http://dx.doi.org/10.1017/etds.2014.9.

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In this article we analyze totally periodic pseudo-Anosov flows in graph 3-manifolds. This means that in each Seifert fibered piece of the torus decomposition, the free homotopy class of regular fibers has a finite power which is also a finite power of the free homotopy class of a closed orbit of the flow. We show that each such flow is topologically equivalent to one of the model pseudo-Anosov flows which we previously constructed in Barbot and Fenley (Pseudo-Anosov flows in toroidal manifolds.Geom. Topol. 17(2013), 1877–1954). A model pseudo-Anosov flow is obtained by glueing standard neighb

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Kang, Sungmo. "Hyperbolic tunnel-number-one knots with Seifert-fibered Dehn surgeries." Journal of Knot Theory and Its Ramifications 29, no. 11 (2020): 2050075. http://dx.doi.org/10.1142/s0218216520500753.

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Suppose [Formula: see text] and [Formula: see text] are disjoint simple closed curves in the boundary of a genus two handlebody [Formula: see text] such that [Formula: see text] (i.e. a 2-handle addition along [Formula: see text]) embeds in [Formula: see text] as the exterior of a hyperbolic knot [Formula: see text] (thus, [Formula: see text] is a tunnel-number-one knot), and [Formula: see text] is Seifert in [Formula: see text] (i.e. a 2-handle addition [Formula: see text] is a Seifert-fibered space) and not the meridian of [Formula: see text]. Then for a slope [Formula: see text] of [Formula

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Stefani, A., K. Nielsen, H. K. Rasmussen, and O. Bang. "Cleaving of TOPAS and PMMA microstructured polymer optical fibers: Core-shift and statistical quality optimization." Optics Communications 285, no. 7 (2012): 1825–33. http://dx.doi.org/10.1016/j.optcom.2011.12.033.

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Irawan, Dedi, Khaikal Ramadhan, Saktioto Saktioto, and Azwir Marwin. "Performance comparison of TOPAS chirped fiber Bragg grating sensor with Tanh and Gaussian apodization." Indonesian Journal of Electrical Engineering and Computer Science 26, no. 3 (2022): 1477–85. https://doi.org/10.11591/ijeecs.v26.i3.pp1477-1485.

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In this work we carried out a numerical simulation with software Optigrating for Apodization chirped fiber Bragg grating (CFBG) with TOPAS material to improve sensitivity sensor, it was found that CFBG with a grating length of 50 mm has advantages in terms of ripple factor, side lobe left (SLL), and side lobe right (SLR) with values of -0,998 and -10,5264 dB, respectively. While the 10 mm CFBG has a narrower full-width half maximum (FWHM) with a value of 0.4528 nm. Tanh and Gaussian apodization were arranged in the CFBG design, it was found that the Tanh linear-CFBG had a narrow FWHM but for t

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Shuvo, Ikra Iftekhar, Mashiur Rahman, Tasneem Vahora, Jason Morrison, Shawna DuCharme, and Lin-P’ing Choo-Smith. "Producing light-weight bast fibers from canola biomass for technical textiles." Textile Research Journal 90, no. 11-12 (2019): 1311–25. http://dx.doi.org/10.1177/0040517519886636.

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Due to the excessive use of water required for cotton cultivation, scientists in this field have been looking at waste biomass as an alternative source of fiber supply. Canola waste biomass is a source of textile fibers which effectively costs nothing, as the biomass can be collected from the waste plant stems of canola plants after harvesting. Therefore, an investigation has been conducted to identify the characteristics of canola fiber and of the canola cultivar ( Brassica napus L.) suitable for textile applications. In this research, a bio-inspired approach was applied to produce fiber from

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Cichosz, Stefan, and Anna Masek. "Thermal Behavior of Green Cellulose-Filled Thermoplastic Elastomer Polymer Blends." Molecules 25, no. 6 (2020): 1279. http://dx.doi.org/10.3390/molecules25061279.

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A recently developed cellulose hybrid chemical treatment consists of two steps: solvent exchange (with ethanol or hexane) and chemical grafting of maleic anhydride (MA) on the surface of fibers. It induces a significant decrease in cellulose moisture content and causes some changes in the thermal resistance of analyzed blend samples, as well as surface properties. The thermal characteristics of ethylene-norbornene copolymer (TOPAS) blends filled with hybrid chemically modified cellulose fibers (UFC100) have been widely described on the basis of differential scanning calorimetry and thermogravi

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Gao, Shixin, Heng Wang, Yuhang Chen, et al. "Point-by-Point Induced High Birefringence Polymer Optical Fiber Bragg Grating for Strain Measurement." Photonics 10, no. 1 (2023): 91. http://dx.doi.org/10.3390/photonics10010091.

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In this paper, the first- and fourth-order fiber Bragg grating (FBG)-based axial strain sensors are proposed. The FBGs are inscribed in step-index polymer optical fibers (POFs) (TOPAS core and ZEONEX cladding) via the point-by-point (PbP) direct-writing technique. A first-order FBG with a single peak is obtained with a pulse fluence of 7.16 J/cm2, showing a strain sensitivity of 1.17 pm/με. After that, a fourth-order FBG with seven peaks is obtained with a pulse fluence of 1.81 J/cm2 with a strain sensitivity between 1.249 pm/με and 1.296 pm/με. With a higher fluence of 2.41 J/cm2, a second fo

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Torres-Castro, Marco, Silvia Hernández-Betancourt, Marco Torres-León, and Fernando Isaías Puerto. "Histological lesions associated to the possible infection by Trypanosoma cruzi (Chagas, 1909) in hearts of synanthropic rodents captured in Yucatan, Mexico." Anales de Biología, no. 38 (April 5, 2016): 29–35. http://dx.doi.org/10.6018/analesbio.38.03.

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Trypanosoma cruzi es el agente causal de la tripanosomiasis americana, padecimiento endémico en México y cuyos reservorios más importantes son los roedores. T. cruzi refiere tropismo al corazón, ocasionando lesiones y colonizando con nidos con amastigotes; por lo que el estudio histológico de este tejido ayuda al diagnóstico. Se capturaron 262 roedores en Yucatán, México; todos considerados en el análisis microscópico, en el cual se observaron lesiones compatibles a la infección por T. cruzi: infiltrado celular inflamatorio (86.7%), degeneración de fibras cardiacas (6.8%) y pericarditis (6.3%)

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Terrazas-Pérez, Santa Dalia, Héctor Manuel Zumbado-Fernández, and Manuel Genovevo Roca-Argüelles. "Desarrollo de hamburguesas con la adición de nuez criolla pecana (Carya illinoinensis) y fibra de trigo (Triticum aestivum), empleando carne de toretes alimentados con dos sistemas de engorde." Revista Científica de la Facultad de Ciencias Veterinarias XXXIII, no. 2 (2023): 1–10. http://dx.doi.org/10.52973/rcfcv-e33270.

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El objetivo de esta investigación fue evaluar el efecto del empleo de nuez pecana, fibra de trigo y carne bovina obtenida de toretes engordados bajo un sistema silvopastoril intensivo (SSPi), sobre las propiedades fisicoquímicas, microbiológicas y sensoriales de hamburguesas. Mediante un diseño de mezclas se obtuvo la mejor formulación de la hamburguesa empleando como variables independientes los porcentajes de carne de toretes engordados bajo un sistema tradicional (ST), nuez pecana, fibra de trigo, aditivos y mezcla de vegetales, considerando como variables de respuesta el color, sabor, olor

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Carvalho, Gloria, Héctor Núñez, Antonio Callocchia, and Freddy Brito. "Desarrollo de aplicación para celulares que permite detectar y corregir fallas en redes de fibra óptica hasta los hogares." Observador del Conocimiento Vol. 1 Nº 1, no. 2343-6212 (2022): 225–31. https://doi.org/10.5281/zenodo.6968958.

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El próximo paso en la evolución de las telecomunicaciones en Venezuela es la sustitución de la red que va desde nuestras casas hasta las centrales telefónicas (red de acceso), pasando del cable de cobre (actual) a la fibra óptica, lo que incrementará el ancho de banda y acceso a la información, sin embargo, se requerirá de un altísimo nivel de especialización para dar soporte en caso de fallas. Este trabajo se propone sistematizar todos los conocimientos y procedimientos de muy alta exigencia técnica, requeridos para

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Hasan, Md Rabiul, S. Ali, and S. A. Emi. "Ultra-low material loss microstructure fiber for terahertz guidance." Photonics Letters of Poland 9, no. 2 (2017): 66. http://dx.doi.org/10.4302/plp.v9i2.679.

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In this letter, we numerically demonstrate a hybrid-core microstructure fiber for low-loss terahertz guidance. Finite element method with circular perfectly matched layer boundary condition is applied to characterize the guiding properties. It is shown that by using a triangular-core inside a square lattice microstructure exhibits ultra-low effective material loss (EML) of 0.169 dB/cm and low confinement loss of 0.087 dB/cm at the operating frequency of 0.75 THz. We also discuss how other guiding properties including power fraction, single mode propagation and dispersion vary with changing of

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Bezerra, Yasmin Bruna de Siqueira, José Vargas de Oliveira, Taciana Keila dos Anjos Ramalho, et al. "ATIVIDADE ACARICIDA DE ÓLEOS ESSENCIAIS SOBRE Tetranychus ludeni (Zacher) (Acari: Tetranychidae) EM DUAS CULTIVARES DE ALGODOEIRO." Nativa 7, no. 5 (2019): 469. http://dx.doi.org/10.31413/nativa.v7i5.7225.

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O presente trabalho teve como objetivo avaliar os efeitos repelentes e as taxas de crescimento populacional de óleos essenciais de Corymbia citriodora, Ocimum basilicum e Myracroduon urundeuva sobre o ácaro vermelho Tetranychus ludeni (Zacher) em algodoeiro de fibra colorida. Para o teste de repelência, óleos de Corymbia citriodora, Ocimum basilicum e Myracroduon urundeuva foram testados em diferentes concentrações sobre fêmeas adultas de T. ludeni, assim como para o teste de crescimento populacional, onde as cultivares foram tratadas com óleos essenciais. O efeito repelente foi verificado par

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Bergmann, C., L. Hallenberger, B. Merlevede, et al. "SAT0291 THE ROLE OF X-LINKED INHIBITOR OF APOPTOSIS PROTEIN (XIAP) IN SYSTEMIC SCLEROSIS." Annals of the Rheumatic Diseases 79, Suppl 1 (2020): 1090.1–1090. http://dx.doi.org/10.1136/annrheumdis-2020-eular.3265.

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Background:Pathologic activation of fibroblasts is a central feature of fibrotic tissue disease in Systemic Sclerosis (SSc). Although individual key signaling pathways of fibroblast activation such as transforming growth factor β (TGFβ) and WNT/β-catenin signaling have been identified, the consequences of the concomitant upregulation of these pathways and their crosstalk are incompletely characterized. Given the high medical need, the identification of mutual activation and amplification loops of profibrotic signals is essential to identify novel candidates for antifibrotic therapies. XIAP (X-

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Pedro Saad, Davi, Gabriel Cabral Serra, Isa Lorena Silva Barbosa, and Ana Lúcia Carrijo Adorno. "UTILIZAÇÃO DE FIBRA DE BORRACHA DE PNEU COMO AGREGADO NA COMPOSIÇÃO DE CONCRETO." Revista Gestão, Inovação e Negócios 3, no. 1 (2017): 107. http://dx.doi.org/10.29246/2358-9868.2017v3i1.p107-129.

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Resumo A indústria do processo de recauchutagem de pneus gera resíduos que em sua maioria têm sido descartados sem nenhum controle. Este fato contribui para aumentar a poluição ambiental e favorecer a proliferação de vetores nocivos à saúde. Visando encontrar uma aplicação para esse tipo de resíduo, neste trabalho são apresentados resultados experimentais de amostras que tiveram o intuito de avaliar o comportamento e a viabilidade do uso de fibra de borracha proveniente de pneu, adicionada em forma de agregado no concreto, com o objetivo de obter um possível material alternativo para a indústr

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Rodríguez-Gandullo, Jose Antonio, and Francisco Álvarez-Barbosa. "Efectos del entrenamiento de fuerza y suplementación en personas vegetarianas: Revisión sistemática (Effects of strength training and supplementation in vegetarian people: Systematic review)." Retos, no. 34 (February 19, 2018): 247–51. http://dx.doi.org/10.47197/retos.v0i34.58300.

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El objetivo del estudio fue investigar los efectos de un entrenamiento de fuerza más una suplementación adicional sobre deportistas adultos no profesionales y vegetarianos. Una revisión sistemática de las bases de datos MEDLINE (PubMed), Scopus, SportDiscus y WOS (Web of Science) fue realizada siguiendo el modelo PICO, utilizando términos que representasen a personas vegetarianas de entre 18 y 64 años que hubiesen realizado una intervención basada en un entrenamiento de fuerza más suplementación. Siguiendo el procedimiento PRISMA, de los 62 estudios encontrados tan solo 3 cumplieron todos los

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Kinhama, V.C, N. Mampassi, JJ Kabuto, and Neto F.F Sousa. "Avaliação laboratorial do efeito de extratos de Azadirachta indica no controle de Insetos-Praga." Meio Ambiente (Brasil) 4, no. 2 (2022): 69–76. https://doi.org/10.5281/zenodo.7325304.

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R E S U M O O feijão caupi (Vigna ungzriculata L.), constitui-se em uma das mais importantes fontes de proteína na alimentação humana, tanto das populações rurais quanto das urbanas, é uma excelente fonte de proteínas com cerca de 23% a 25% em média e apresenta todos os aminoácidos essenciais, carboidratos com 62% em média, vitaminas e minerais, além de grande quantidade de fibras dietéticas e teor de óleo com 2% em média. Um fator limitante que afeta a produção, produtividade

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Queiroz, Manoel Abílio de. "Recursos Genéticos Vegetais da Caatinga para o Desenvolvimento do Semiárido Brasileiro (Caatinga Plant Genetic Resources for the Developmentof the Brazilian Semiarid)." Revista Brasileira de Geografia Física 4, no. 6 (2012): 1135. http://dx.doi.org/10.26848/rbgf.v4i6.232770.

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O Semiárido brasileiro, caracterizado por uma precipitação abaixo de 800 mm por ano, grande taxa de evaporação e elevado risco de seca, tem uma extensão aproximada de um milhão de quilômetros quadrados, que encerra 1.133 municípios de nove Estados e onde se insere o bioma caatinga. É uma região que apresenta grande variação ambiental e dentro dos recursos naturais, a cobertura vegetal aliada ao conhecimento e inovação é a que apresenta maior chance de manejo com vistas a criar potencialidades para serem integradas nas estratégias de desenvolvimento. O bioma caatinga vem sendo estudado e mais d

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Rosa, Vandayse Abades, and Joaquim Pedro Soares Neto. "Atributos Físicos e Estoque de Carbono em Sistemas Agroflorestais nos Cerrados do Oeste da Bahia." Revista Brasileira de Geografia Física 12, no. 7 (2020): 2660. http://dx.doi.org/10.26848/rbgf.v12.7.p2660-2671.

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Os sistemas agroflorestais (SAF’s) têm permitido a recuperação de áreas degradadas, a produção de cultivos de alimentos, madeiras e fibras, além de gerar serviços ambientais, como aumento da matéria orgânica do solo e conservação da biodiversidade. Esse trabalho teve como objetivo avaliar os efeitos dos SAF’s nos atributos físicos do solo e no estoque de carbono em um Neossolo Quartzarênico órtico dos cerrados do oeste da Bahia. Os aspectos avaliados foram: Cerrado nativo, sistema com cacau/banana/arvores nativas com 18 anos de uso (SAF.1), eucalipto/pastagem com 8 anos de uso (SAF.2) e eucali

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Koni, Arkid, Alanna M. Gado, Stoyan Bliznakov, Leonard J. Bonville, and Radenka Maric. "A Path to Significant Reduction of the Interfacial Contact Resistance of Sintered Titanium Porous Transport Layers in Advanced Proton Exchange Membrane Water Electrolyzers." ECS Meeting Abstracts MA2022-01, no. 39 (2022): 1745. http://dx.doi.org/10.1149/ma2022-01391745mtgabs.

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Proton exchange membrane water electrolyzers (PEMWEs) are a leading industry solution to large scale production of green hydrogen, and as a form of energy storage [5]. The PEMWEs have the advantages of having greater energy efficiency, higher product purity, and are environmentally friendly. Within the construction of a PEMWE stack, there are many catalysts coated membranes (CCMs) sandwiched between anode porous transport layers (PTLs) and cathode Gas Diffusion Layers. The PTL is constructed of sintered titanium powder or fibers. The Ti-PTL is on the anode side of a PEMWE cell where the water

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Frey, Jonas, and Thomas Streicher. "Triposes as a generalization of localic geometric morphisms." Mathematical Structures in Computer Science, January 29, 2021, 1–10. http://dx.doi.org/10.1017/s0960129520000304.

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Abstract In Hyland et al. (1980), Hyland, Johnstone and Pitts introduced the notion of tripos for the purpose of organizing the construction of realizability toposes in a way that generalizes the construction of localic toposes from complete Heyting algebras. In Pitts (2002), one finds a generalization of this notion eliminating an unnecessary assumption of Hyland et al. (1980). The aim of this paper is to characterize triposes over a base topos ${\cal S}$ in terms of so-called constant objects functors from ${\cal S}$ to some elementary topos. Our characterization is slightly different from t

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Emmerson, Parker. "Anterolateral Lite 2." Journal of Liberated Mathematics, May 25, 2025. https://doi.org/10.5281/zenodo.15510371.

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The \emph{Anterolateral Lite 2} formalism arises from a need to robustly track analytic and symbolic distinctions that are often lost in traditional algebraic and geometric frameworks, especially in contexts involving multi-branched solutions and subtle phase phenomena, such as Lorentzian and radical expressions. Classical algebraic structures, which treat coordinates as atomic or globally coherent entities, are prone to \emph{branch collapse}: the unwanted identification of distinct solution branches through singularities, degenerate loci, or insufficiently expressive type systems. Building o

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Damon, James. "Characteristic cohomology II: Matrix singularities." Journal of Topology 17, no. 3 (2024). http://dx.doi.org/10.1112/topo.12330.

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AbstractFor a germ of a variety , a singularity of “type ” is given by a germ , which is transverse to in an appropriate sense, such that . In part I of this paper, we introduced for such singularities the Characteristic Cohomology for the Milnor fiber (for a hypersurface), and complement and link (for the general case). It captures the cohomology of inherited from and is given by subalgebras of the cohomology for for the Milnor fiber and complements, and is a subgroup for the cohomology of the link. We showed these cohomologies are functorial and invariant under diffeomorphism groups of equiv

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Sawicki, Damian, and Jianchao Wu. "Straightening warped cones." Journal of Topology and Analysis, January 15, 2020, 1–25. http://dx.doi.org/10.1142/s179352532050034x.

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We provide the converses to two results of Roe [Warped cones and property A, Geom. Topol. 9 (2005) 163–178, https://doi.org/10.2140/9t.2005.9.163 ]: first, the warped cone associated to a free action of an a-T-menable group admits a fibered coarse embedding into a Hilbert space, and second, a free action yielding a warped cone with property A must be amenable. We construct examples showing that in both cases the freeness assumption is necessary. The first equivalence is obtained also for other classes of Banach spaces, in particular for [Formula: see text]-spaces.

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Li, Fuzhao, and Henning Menzel. "Electrospinning of Cyclic Olefin Copolymer for the Production of Highly Aligned Dye‐Doped Optical Fibers." Macromolecular Materials and Engineering, September 27, 2023. http://dx.doi.org/10.1002/mame.202300292.

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AbstractCyclic olefin copolymer (COC, Topas 5013, with 75% norbornene) has special properties like high glass transition temperature, low moisture uptake, chemical inertness, and a high degree of transmission in UV range, making it competitive with other materials such as poly (methyl methacrylate) and polycarbonate for the production of optical devices. Electrospinning provides a facile way to produce fibers. In order to generate highly aligned fibers fulfilling the requirements for optical applications, stable‐jet electrospinning can be used, in which the bending instabilities are suppressed

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Debella, Leticia Col, Thomás Lima de Resende, Luis Alberto Montoya-Coronado, and Ricardo Pieralisi. "Análise quantitativa dos mecanismos de transferência de força cortante de vigas de concreto armado reforçado com fibras de aço." Ambiente Construído 24 (December 2024). http://dx.doi.org/10.1590/s1678-86212024000100744.

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Resumo O entendimento do comportamento à força cortante de vigas de concreto armado, especialmente as vigas de concreto reforçado com fibras de aço (CRFA), ainda é um desafio para a comunidade científica, devido à complexidade do comportamento dos materiais. No entanto, a evolução da técnica de correlação por imagem digital (CID) permitiu a obtenção de dados experimentais fundamentais para a modelagem do comportamento mecânico do CRFA, contribuindo para um melhor entendimento do problema e dos mecanismos resistentes à força cortante. Neste sentido, o presente estudo avalia oito vigas de concre

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Jesus, Paula Andreatti de, José Luiz Pinheiro Melges, Emerson Alexandro Bolandim, and Ana Paula Fugii. "Avaliação do comportamento mecânico de tubos de concreto reforçado com fibras de aço." Ambiente Construído 25 (2025). https://doi.org/10.1590/s1678-86212025000100834.

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Resumo Este estudo tem por finalidade avaliar experimentalmente o comportamento mecânico de tubos de concreto reforçados com fibras de aço quando submetidos ao ensaio de compressão diametral, conforme previsto na NBR 8890:2020. Foram produzidos tubos do tipo ponta e bolsa, com diâmetros nominais de 400 mm, 500 mm e 600 mm para as classes de resistência PA1 e PA2, todos com 1500 mm de comprimento e reforçados com 30 kg/m³ de fibras de aço do tipo Dramix 3D 65/35 BG. Os tubos foram instrumentados com LVDTs e submetidos ao ensaio de compressão diametral. As análises dos resultados, mediante a con

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yang, huailin, jian yang, qibo xu, zhengyu shen, and Hua Yang. "Highly Birefringent Photonic Crystal Fibers with Near-zero Flattened Dispersion for Polarization-Maintaining Terahertz Transmission." Physica Scripta, March 11, 2024. http://dx.doi.org/10.1088/1402-4896/ad328d.

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Abstract In this work, we present a novel hexagonal lattice porous-core photonic crystal fiber (PCF) exhibiting high birefringence, low loss, and near-zero flattened dispersion in the terahertz regime. The core design incorporates asymmetric rectangular and triangular air holes to achieve enhanced birefringence performance. The background material, TOPAS, is carefully selected to minimize dispersion and transmission losses. Furthermore, by employing the finite element method, the guiding properties of the proposed PCF are comprehensively investigated. Our simulation results reveal a near-zero

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Amoiridis, Michalis, John Verigos, Karen Meaburn, et al. "Inhibition of topoisomerase 2 catalytic activity impacts the integrity of heterochromatin and repetitive DNA and leads to interlinks between clustered repeats." Nature Communications 15, no. 1 (2024). http://dx.doi.org/10.1038/s41467-024-49816-7.

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AbstractDNA replication and transcription generate DNA supercoiling, which can cause topological stress and intertwining of daughter chromatin fibers, posing challenges to the completion of DNA replication and chromosome segregation. Type II topoisomerases (Top2s) are enzymes that relieve DNA supercoiling and decatenate braided sister chromatids. How Top2 complexes deal with the topological challenges in different chromatin contexts, and whether all chromosomal contexts are subjected equally to torsional stress and require Top2 activity is unknown. Here we show that catalytic inhibition of the

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Sandip, Das, Prasad Mitra Shankar, and Das Shuvendu. "Design and Analysis of Photonic Crystal Fiber for Terahertz Communication." June 7, 2025. https://doi.org/10.5281/zenodo.14591696.

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Photonic crystal fibers (PCFs) are revolutionizing the field of THz communication. This paper presents a Topas-based PCF design simulated using COMSOL Multiphysics software, that boasts exceptional properties tailored for THz applications. The proposed structure features a rectangular air gap core with integrated square slots, surrounded by a cladding adorned with circular air holes of varying sizes. The meticulously crafted arrangement of these holes forms distinct square lattice structures, each playing a crucial role in optimizing the fiber’s performance.

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Moradi, Farhad, Adebiyi Oresegun, Amin Khodaei, et al. "Coupled ionizing-radiation/optical-photon transport Monte Carlo simulations for characterisation of light signal in an optical fiber radioluminescence dosimetry system." Biomedical Physics & Engineering Express, February 26, 2025. https://doi.org/10.1088/2057-1976/adba65.

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Abstract Optical fiber radioluminescence (RL) dosimetry has gained prominence in modern radiation therapy, offering real-time measurement and high spatial resolution. Our research group has developed a system utilizing a polymethyl methacrylate (PMMA) transmission fiber coupled with a photodetector and various scintillators, including doped silica fibers. A critical challenge in RL dosimetry lies in distinguishing the stem signal, generated by the transmission optical fiber, from the primary light signal produced by the RL sensor. To address this issue, we employed the Geant4 simulation tool,

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Bustamante, García Marifé, Feliu Montserrat Martinez, Karin Servan, and Percy Mayta-Tristan. "Oferta y composición nutricional de ensaladas en patios de comida de centros comerciales de Lima Metropolitana, 2014." Instituto Nacional de Salud (INS), January 25, 2016. https://doi.org/10.5281/zenodo.7153079.

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Objetivos. Evaluar la oferta y composición nutricional de las ensaladas ofrecidas como plato principal en los patios de comida de los centros comerciales de Lima, Perú. Materiales y métodos. Se revisó las cartas de comida de todas las franquicias presentes en los patios de comida de los once centro comerciales de Lima, luego se evaluó la composición nutricional de las ensaladas ofertadas como plato principal calculando su contenido calórico, proteico, carbohidratos, grasas, colesterol, fibra y sodio, y la adecuación de ingesta para una ce

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Georgi, Peter, Åsa Carlsson Tedgren, Linda Persson, and Jacob Graversen Johansen. "Determination of intrinsic energy dependence of point‐like inorganic scintillation detector in brachytherapy." Medical Physics, January 10, 2024. http://dx.doi.org/10.1002/mp.16904.

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AbstractBackgroundInorganic scintillation detectors (ISDs) are promising for in vivo dosimetry in brachytherapy (BT). ISDs have fast response, providing time resolved dose rate information, and high sensitivity, attributed to high atomic numbers. However, the conversion of the detector signal to absorbed dose‐to‐water is highly dependent on the energy spectrum of the incident radiation. This dependence is comprised of absorbed dose energy dependence, obtainable with Monte Carlo (MC) simulation, and the absorbed dose‐to‐signal conversion efficiency or intrinsic energy dependence requiring measu

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