cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exploratory applications of 2-nitrobenzaldehyde-derived Morita–Baylis–Hillman adducts as synthons in the construction of drug-like scaffolds
Creators: name: Kenudi C. Idahosa
name: Davies-Coleman, Michael T.
name: Kaye, Perry T.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Morita–Baylis–Hillman adducts, prepared from 2-nitrobenzaldehyde precursors and either methyl acrylate or methyl vinyl ketone, have been used as critical synthons in the preparation of α-[(alkylamino)methyl]cinnamate esters and their but-3-en-2-one analogs, cinnamate ester-azidothymidine (AZT) conjugates, 2-quinolone and quinoline derivatives. Computer docking studies have been conducted to explore the potential of the cinnamate ester–AZT conjugates as potential dual-action HIV-1 integrase–reverse transcriptase (IN–RT) inhibitors. The results further demonstrate the applicability of Morita–Baylis–Hillman methodology in the construction of complex drug-like scaffolds.
Cold reactive and non-reactive collisions of Li and Rb with C$_2^-$: implications for hybrid trap experiments
Creators: name: Kas, Milaim
name: Loreau, Jérôme
name: Liévin, Jacques
name: Vaeck, Nathalie
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a theoretical investigation of cold reactive and non-reactive collisions of Li and Rb atoms with C$_{2}^{-}$. The potential energy surfaces for the singlet and triplet states of the Li--C$_{2}^{-}$ and Rb--C$_{2}^{-}$ systems have been obtained using the CASSCF/ic-MRCI+Q approach with extended basis sets. The potential energy surfaces are then used to investigate the associative detachment reaction and to calculate rotationally inelastic cross sections by means of the close-coupling method. The effect of the core correlation on the potential energy surfaces is discussed and we estimate the error on the collisional cross sections induced by freezing the $1s$ orbitals of the carbon atoms. The results are compared to those obtained for the Rb-OH$^{-}$ system and the applications for hybrid trap experiments are explored. Furthermore, we discuss the possibility to perform Doppler thermometry on the C$_{2}^{-}$ anion and investigate the collision process involving excited states. The implications for sympathetic cooling experiments are also discussed.
A convenient route to 1,3-diynes using ligand-free Cadiot-Chodkiewicz coupling reaction at room temperature under aerobic conditions
Creators: name: Sujatha Asha
name: Sasidharan Anjana
name: Anns Maria Thomas
name: Minu Elizabeth Thomas
name: K. R. Rohit
name: K. Keerthi Krishnan
name: Sankuviruthiyil M Ujwaldev
name: Gopinathan Anilkumar
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: In this study, we report a copper-catalyzed ligand-free Cadiot-Chodkiewicz coupling reaction. No additives or ligands are required for this Cu-catalyzed C(sp)-C(sp) coupling reaction of terminal alkynes with alkynyl halides. The low cost of copper catalyst, excellent yield of the products, suppression of side-products and mild reaction conditions are the major advantages of this protocol.
title: Ð¡Ð¸ÑÑÐµÐ¼Ð° Ð²Ð¸Ð´Ð¸Ð¾ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ Ð¸ ÑÑÐµÑÐ° Ð¿Ð°ÑÐºÐ¾Ð²Ð¾ÑÐ½ÑÑ Ð¼ÐµÑÑ Ð½Ð° Ð¾ÑÐºÑÑÑÑÑ ÑÑÐ¾ÑÐ½ÐºÐ°Ñ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² ÑÐ¸ÑÑÐ¾Ð²Ð¾Ð¹ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ¸ Ð¸Ð·Ð¾Ð±ÑÐ°Ð¶ÐµÐ½Ð¸Ð¹
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: The system of video monitoring and accounting of parking spaces in open parking lots based on digital image processing methods
Creators: name: ÐÐ¾Ð»Ð¾Ð½ÑÐºÐ¸Ð¹, ÐÐ°ÐºÑÐ¸Ð¼
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: Ð¿Ð°ÑÐºÐ¾Ð²Ð¾ÑÐ½Ð¾Ðµ Ð¼ÐµÑÑÐ¾
Ð´Ð°ÑÑÐ¸Ðº
ÑÐ²ÐµÑÑÐ¾ÑÐ½ÑÐµ Ð½ÐµÐ¹ÑÐ¾Ð½Ð½ÑÐµ ÑÐµÑÐ¸
ÑÐ¸ÑÑÐ¾Ð²Ð°Ñ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ°
parking space
sensor
convolutional neural networks
digital processing

description: Ð¢ÐµÐ¼Ð° Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ: Â«Ð¡Ð¸ÑÑÐµÐ¼Ð° Ð²Ð¸Ð´ÐµÐ¾ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ Ð¸ ÑÑÐµÑÐ° Ð¿Ð°ÑÐºÐ¾Ð²Ð¾ÑÐ½ÑÑ Ð¼ÐµÑÑ Ð½Ð° Ð¾ÑÐºÑÑÑÑÑ ÑÑÐ¾ÑÐ½ÐºÐ°Ñ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² ÑÐ¸ÑÑÐ¾Ð²Ð¾Ð¹ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ¸ Ð¸Ð·Ð¾Ð±ÑÐ°Ð¶ÐµÐ½Ð¸Ð¹Â».Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¸ÑÑÑ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐ¿Ð¾ÑÐ¾Ð±Ð¾Ð² ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ Ð¿Ð°ÑÐºÐ¾Ð²Ð¾ÑÐ½ÑÑ Ð¼ÐµÑÑ, Ð° ÑÐ°ÐºÐ¶Ðµ ÑÐ¿Ð¾ÑÐ¾Ð±Ñ ÑÐ¸ÑÑÐ¾Ð²Ð¾Ð¹ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ¸ Ð¸Ð·Ð¾Ð±ÑÐ°Ð¶ÐµÐ½Ð¸Ð¹ Ð´Ð»Ñ Ð´Ð°Ð½Ð½Ð¾Ð¹ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ñ. ÐÑÐ¾Ð²ÐµÐ»Ð¸ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÑ Ð¸ ÑÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ ÑÐ²ÐµÑÑÐ¾ÑÐ½ÑÑ Ð½ÐµÐ¹ÑÐ¾Ð½Ð½ÑÑ ÑÐµÑÐµÐ¹ Ð´Ð»Ñ ÑÐ°ÑÐ¿Ð¾Ð·Ð½Ð°Ð²Ð°Ð½Ð¸Ñ Ð¾Ð±ÑÐ°Ð·Ð¾Ð² Ð² Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐµÐ¼Ðµ. ÐÑÐ»Ð° Ð¸Ð·ÑÑÐµÐ½Ð° Ð¿ÑÐµÐ´Ð¾Ð±ÑÑÐµÐ½Ð½Ð°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ ÑÐ°ÑÐ¿Ð¾Ð·Ð½Ð°Ð²Ð°Ð½Ð¸Ñ, Ð² Ð´Ð°Ð»ÑÐ½ÐµÐ¹ÑÐµÐ¼ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·ÑÐµÐ¼Ð°Ñ Ð² Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ.Â Â 
description: The topic of the graduate qualification work: "The system of video monitoring and accounting of parking spaces in open parking lots based on methods of digital image processing.This paper analyzes ways to control parking spaces, as well as methods of digital image processing for this problem. We have characterized and compared convolutional neural networks for pattern recognition in this topic. A pre-trained recognition model has been studied, further used in this paper.
Additional file 2 of Integrating academic and professional integrity: a co-designed serious game for nursing students - a multi-methods study
Creators: name: Creighton, Laura
name: Mitchell, Gary
name: Hamilton, Conor
name: Craig, Stephanie
name: Stark, Patrick
name: McLaughlin-Borlace, Nuala
name: Slade, Christine
name: Brown Wilson, Christine
Publisher: name: figshare
Year: 2025
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Plant Biology
subject: FOS: Biological sciences

description: Supplementary Material 2
Transporting present laboratory experiments on environmental comfort to Remote Access Laboratories
Creators: name: Ruschel, Regina Coeli
name: Pereira Freire, Fernanda Maria
name: Bernardi, Nubia
name: Cardozo, Eleri
name: Gomes Guimarães, Eliane
name: Vilhete Viegas D’Abreu, João
name: Túlio Chella, Marcos
name: Cecília Martins, Maria
name: Cuperschmid, Ana Regina
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 330105
subject: Architectural science and technology
classificationCode: 330101
subject: Architectural computing and visualisation methods

description: This article partially presents the learning action proposed by the Learning Content Group of the Laboratory e-labora. The objective of the learning action is to serve as concept proof of the distance-learning environment under development in the TIDIA-Ae project. The topic of Introduction to Environmental Comfort was selected as the main theme of the action proposed for undergraduate students of Architecture. The corresponding distance learning course developed for the action is concerned in introducing students to elementary notions on the topic through observation and experimentations associated to practice. In this context, two infrastructures of Remote Access Laboratories (RAL) were used: the RAL-SIROS for an experiment on built environment evaluation on accessibility and the RAL-REAL for an experiment on ventilation evaluation on scaled model. This article discusses the necessary interdisciplinary effort for the mapping of present laboratory experiments to RALs. It is also presented the validation process of the proposed experiments and the corresponding implementation in RAL format.
Mixed integer formulations using natural variables for single machine scheduling around a common due date
Creators: name: Falq, Anne-Elisabeth
name: Fouilhoux, Pierre
name: Kedad-Sidhoum, Safia
Publisher: name: arXiv
Year: 2019
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: While almost all existing works which optimally solve just-in-time scheduling problems propose dedicated algorithmic approaches, we propose in this work mixed integer formulations. We consider a single machine scheduling problem that aims at minimizing the weighted sum of earliness tardiness penalties around a common due-date. Using natural variables, we provide one compact formulation for the unrestrictive case and, for the general case, a non-compact formulation based on non-overlapping inequalities. We show that the separation problem related to the latter formulation is solved polynomially. In this formulation, solutions are only encoded by extreme points. We establish a theoretical framework to show the validity of such a formulation using non-overlapping inequalities, which could be used for other scheduling problems. A Branch-and-Cut algorithm together with an experimental analysis are proposed to assess the practical relevance of this mixed integer programming based methods.
description: 32 pages, 10 figures
Decay $Λ_b \to p l \bar ν$ in QCD sum rules
Creators: name: Huang, Chao-Shang
name: Qiao, Cong-Feng
name: Yan, Hua-Gang
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The $Λ_b \to p$ semileptonic decay is analyzed by using QCD sum rules within the framework of heavy quark effective theory. The Isgur-Wise function of $Λ_b \to p l \barν$ has been calculated. The decay width is given.
description: 6 pages Latex file, 4 figures, corrected file forms
MOESM1 of Copy number of 8q24.3 drives HSF1 expression and patient outcome in cancer: an individual patient data meta-analysis
Creators: name: Brusselaers, Nele
name: Ekwall, Karl
name: Durand-Dubief, Mickael
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Cancer
subject: Mental Health
subject: Virology

description: Additional file 1 : Table S1. Data Collected. Table S2. Descriptive characteristics of all individuals (n = 9568) with 8q24.3 homogenous copy number alteration information, first cancer diagnosis and 5-year follow-up. Table S3. Results of the 2-step individual patient data meta-analyses to assess the effect of 8q24.3 copy number variants on prognosis. Table S4. Five-year mortality by 8q24.3 copy number alteration using diploidy as a reference. Table S5. Five-year mortality of 15 cancer types with most cases of 8q24.3 gain and amplification using diploidy as a reference. Appendix 1. Flow chart illustrating selection of individuals for individual patient data meta-analysis. Appendix 2. Overview of HSF1 expression per histological subtype. Appendix 3. Expression of HSF1 in function of HSF1 copy number alteration per histological subtype. Appendix 4. Number of publication and description of selected cancer-related genes per field located in 8q24.3 cytoband. Appendix 5. Influence of 8q24.3 copy number alteration on other cancer-related genes expression located in 8q24.3 loci and comparison of expression with HSF1 per tissue. Appendix 6. Simple linear regressions of predicted 8q24.3 copy number alteration compared to the expression of genes located in 8q24.3 per tissue.
Efficient protocol for Aza-Michael addition of N-heterocycles to α,β-unsaturated compound using [Ch]OH and [n-butyl urotropinium]OH as basic ionic liquids in aqueous/solvent free conditions
Creators: name: Sitanshu Kumar
name: Kaur, Amanpreet
name: Singh, Vasundhara
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology

description: The present work emphasizes on a green methodology using designed and synthesized basic ionic liquid, [n-butyl Urotropinium]OH, and commercially available aqueous solution of choline hydroxide [Ch]OH as catalysts for executing Aza-Michael addition of N-heterocycles to α,β-unsaturated compounds at room temperature. The highlighting features of these catalysts include using low concentration of both catalysts along with [Ch]OH being low cost and biodegradable, [n-butyl Urotropinium]OH significantly enhancing the high substrate/catalyst ratio to obtain the desired products in high yield and purity in most cases. Further, both catalysts were recyclable and recoverable up to five cycles.
Scopaeina
Creators: name: Herman, Lee
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae

description: KEY TO GENERA OF THE SCOPAEINA   1. Head with trichobothrium in cavity on temple, behind and separated from margin of eye (figs. 267, 282); tropical and subtropical regions of World.............................. Micranops
– Head with trichobothrium in canal or depression and touching dorsal margin of eye (figs. 13–16, 245, 297, 333, 334).............2
 2(1).Metakatepisternal process apically acute (figs. 89, 97), longer than wide (figs. 83, 101, 154) or rarely with length and width about equal (fig. 94); metaventrite with stridular file (figs. 104, 115, 119); mesofemur with plectral ridges (figs. 85, 121, 132, 157, 197); widespread in all temperate, subtropical, and tropical regions.................................. Scopaeus
– Metakatepisternal process short, wide, and apically blunt or rounded (figs. 241, 300, 335); metaventrite without stridular file (figs. 251–252, 300–301, 335–336); mesofemur without plectral ridges (figs. 253, 279, 302, 337)....................................................................3
 3(2).Trichobothrium adjacent to posterodorsal margin of eye (figs. 297, 309, 315); Canada to Guatemala............................................. Orus
– Trichobothrium adjacent to (fig. 245) or slightly ahead of (figs. 333–334) middorsal margin of eye....................................................4
 4(3).Neck petiolate, nuchal groove narrow, about one eighth to one sixth as wide as greatest postocular width of head (fig. 240); Tropical and subtropical regions of Africa, India, southern Asia, Australia......... Hyperscopaeus
 – Neck not petiolate, nuchal groove wide, about one third to two fifths as wide as greatest postocular width of head (fig. 342); China, Nepal, India, Thailand, Borneo................................................ Trisunius
description: Published as part of Herman, Lee, 2023, Generic Revisions Of The Scopaeina And The Sphaeronina (Coleoptera: Staphylinidae: Paederinae: Lathrobiini), pp. 1-195 in Bulletin of the American Museum of Natural History 2023 (460) on page 61, DOI: 10.1206/0003-0090.460.1.1, http://zenodo.org/record/8110297
Soliton and 2D domains in ultra-thin magnetic films
Creators: name: Chui, S. T.
name: Ryzhov, V. N.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We show that many two dimensional domain patterns observed in Monte Carlo simulations can be obtained from the many soliton solutions of the imaginary time Sine Gordon equation. This opens the door to analytic physical understanding of the micromagnetics in ultra-thin films.
description: 9 pages, 3 PostScript figures
Generating Diffusion MRI scalar maps from T1 weighted images using generative adversarial networks
Creators: name: Gu, Xuan
name: Knutsson, Hans
name: Nilsson, Markus
name: Eklund, Anders
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Diffusion magnetic resonance imaging (diffusion MRI) is a non-invasive microstructure assessment technique. Scalar measures, such as FA (fractional anisotropy) and MD (mean diffusivity), quantifying micro-structural tissue properties can be obtained using diffusion models and data processing pipelines. However, it is costly and time consuming to collect high quality diffusion data. Here, we therefore demonstrate how Generative Adversarial Networks (GANs) can be used to generate synthetic diffusion scalar measures from structural T1-weighted images in a single optimized step. Specifically, we train the popular CycleGAN model to learn to map a T1 image to FA or MD, and vice versa. As an application, we show that synthetic FA images can be used as a target for non-linear registration, to correct for geometric distortions common in diffusion MRI.
Hyperscopaeus Coiffait 2023, New Status
Creators: name: Herman, Lee
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Hyperscopaeus

description: Hyperscopaeus Coiffait, New Status   Figures 11, 17, 240–255
 Hyperscopaeus Coiffait, 1984: 150. Type species:
description: Published as part of Herman, Lee, 2023, Generic Revisions Of The Scopaeina And The Sphaeronina (Coleoptera: Staphylinidae: Paederinae: Lathrobiini), pp. 1-195 in Bulletin of the American Museum of Natural History 2023 (460) on page 110, DOI: 10.1206/0003-0090.460.1.1, http://zenodo.org/record/8110297
LAPW frozen-phonon calculation, shell model lattice dynamics and specific-heat measurement of SnO
Creators: name: Koval, S.
name: Burriel, R.
name: Stachiotti, M. G.
name: Castro, M.
name: Migoni, R. L.
name: Moreno, M. S.
name: Varela, A.
name: Rodriguez, C. O.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: An ab-initio Linear Augmented Plane-Wave (LAPW) calculation of the zone-centered phonon frequencies of SnO has been performed. E$_g$ symmetry has been ascribed to the mode observed at 113 cm$^{-1}$ in Raman measurements, discarding a previous B$_{1g}$ assignement. The other phonon modes measured by Raman spectroscopy are also well reproduced. A new shell-model has also been developed, that gives good agreement of the zone-centered frequencies compared to the measured data and the LAPW results. Specific heat measurements have been performed between 5 K and 110 K. Computation of the specific heat and the Mössbauer recoilless fraction with the improved shell-model shows a good agreement with the experimental data as a function of temperature.
description: 11 pages, 1 figure. to appear in Phys. Rev. B (November 1999)
MOESM2 of Identification of microRNAs regulated by tobacco curly shoot virus co-infection with its betasatellite in Nicotiana benthamiana
Creators: name: Du, Jiang
name: Wu, Gentu
name: Zhou, Zhongpiao
name: Zhang, Jiayuan
name: Li, Mingjun
name: Sun, Miao
name: Jiang, Kairong
name: Qing, Ling
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: FOS: Biological sciences
subject: Virology

description: Additional file 2: Figure S1. The precursors of 42 novel microRNAs and their hairpin structures in N. benthamiana.
Palladium-Catalysed Amination of Hindered Aryl Halides with 9H-Carbazole
Creators: name: Yuhki Ohtsuka
name: Hagiwara, Hideki
name: Miyazaki, Takanori
name: Yamakawa, Tetsu
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine

description: Palladium-catalysed Buchwald-Hartwig amination of ortho-substituted hindered aryl bromides or chlorides with 9H-carbazole has been investigated. In the amination of 1-bromo- or chloronaphthalene with 9H-carbazole, the combined use of Pd2(dba)3 as a Pd precursor, Buchwald ligands with two tert-butyl groups and LiOtBu or lithium hexamethyldisilazide as a base led to satisfactory yields. N,N’-Bis[2,6-bis(diphenylmethyl)-4-methoxyphenyl]imidazol-2-ylidene (IPr*OMe), which is a bulky N-heterocyclic carbene ligand, showed similar activity as Buchwald ligands with two tert-butyl groups. In contrast, only IPr*OMe provided satisfactory yields in the amination of 2-bromo-1,1′-biphenyl with 9H-carbazole. The amination of 2-bromo- or chlorotoluene and 1-(2-bromo- or chlorophenyl)naphthalene with 9H-carbazole proceeded smoothly when the IPr*OMe ligand was used.
Existence of σ(600)/κ(900)-Particle and New Chiral Scalar Nonet ``Chiralons''
Creators: name: Ishida, Muneyuki
name: Ishida, Shin
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The σ(600) and κ(900), observed in the phase shift analyses, satisfy rather well the mass and width relation predicted by the SU(3)LsM and the SU(3)LsM with the vector and axial-vector meson nonets, and deserve to be the members of scalar σ-nonet, together with the observed resonances a_0(980) and f_0(980), as a chiral partner of pseudoscalar π-nonet. In the phase shift analyses an introduction of repulsive background phase δ_{BG} is essential, whose origin has a close connection to the λϕ^4 interaction in LsM. It is argued that the members of this σ-nonet, "Chiralons", have different properties and should be discriminated from the conventional ^3P_0-qqbar-scalar nonet.
description: Talk at HADRON'97, the 7th int. conf. on hadron spectroscopy, BNL, August 1997. 4 pages with 1 eps figure
A Sequential Quadratic Programming Method for Constrained Multi-objective Optimization Problems
Creators: name: Ansary, Md Abu Talhamainuddin
name: Panda, Geetanjali
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 90C26, 49M05, 97N40, 90B99

description: In this article, a globally convergent sequential quadratic programming (SQP) method is developed for multi-objective optimization problems with inequality type constraints. A feasible descent direction is obtained using a linear approximation of all objective functions as well as constraint functions. The sub-problem at every iteration of the sequence has feasible solution. A non-differentiable penalty function is used to deal with constraint violations. A descent sequence is generated which converges to a critical point under the Mangasarian-Fromovitz constraint qualification along with some other mild assumptions. The method is compared with a selection of existing methods on a suitable set of test problems.
description: 19 pages, 11 figures
MOESM3 of Identification of microRNAs regulated by tobacco curly shoot virus co-infection with its betasatellite in Nicotiana benthamiana
Creators: name: Du, Jiang
name: Wu, Gentu
name: Zhou, Zhongpiao
name: Zhang, Jiayuan
name: Li, Mingjun
name: Sun, Miao
name: Jiang, Kairong
name: Qing, Ling
Publisher: name: figshare
Year: 2019
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Additional file 3: Figure S2. First nucleotide bias and nucleotide bias analysis.
СОСТАВ И ИСТОЧНИКИ РУДООБРАЗУЮЩИХ ФЛЮИДОВ БОЛЬШЕКАРАНСКОГО И НИКОЛАЕВСКОГО МЕСТОРОЖДЕНИЙ ЗОЛОТА ПО ДАННЫМ РАСПРЕДЕЛЕНИЯ РЕДКОЗЕМЕЛЬНЫХ ЭЛЕМЕНТОВ И ИТТРИЯ В РУДНОМ ПИРИТЕ
Creators: name: Н.М. Знаменская
name: С.Е. Знаменский
Publisher: name: Вестник Академии наук Республики Башкортостан
Year: 2021
Subjects: Au-порфировые и Au субэпитермальные месторождения
редкоземельные элементы
иттрий
аномалии Eu и Ce
рудообразующий флюид

description: Изучено распределение редкоземельных элементов и иттрия в рудном пирите Au-порфирового Большекаранского и Au cубэпитермального Николаевского месторождений, расположенных в зоне Главного Уральского разлома в Учалинском районе РБ. Установлено, что пирит и рудоносные дайки изучавшихся месторождений имеют близкие спектры распределения РЗЭ. На месторождении Большой Каран они обогащены легкими лантаноидами, а на Николаевском месторождении – тяжелыми РЗЭ. Положительные аномалии Eu в рудном пирите месторождения Большой Каран (Eu/Eu*=1,14–3,03) указывают на высокотемпературную обстановку его кристаллизации и восстановленный состав флюида, а наличие отрицательных аномалий Се (Ce/Ce*=0,71–0,91) – на взаимодействие флюида с вмещающими известняками. Отрицательные аномалии Eu в пирите Николаевского месторождения (Eu/Eu*=0,92–0,99) отражают низкотемпературные условия рудообразования и окислительные свойства гидротермальной системы. Вероятно, они связаны с участием в рудообразовании окисленных метеорных вод. Значения Y/Ho в пирите обоих месторождений попадают в интервалы величин этого отношения в рудоносных дайках и морских известняках. Кроме того, для пирита Николаевского месторождения установлены значения Y/Ho, характерные для морской воды. Результаты исследований дают основание полагать, что в состав минералообразующих флюидов Большекаранского и Николаевского месторождений входили компоненты магматогенной природы и извлеченные из известняков. В образовании золотой минерализации Николаевского месторождения участвовали также метеорные воды и морская вода.
Additional file 1 of A novel PTH1R mutation causes primary failure of eruption via the cAMP-PI3K/AKT pathway
Creators: name: Lu, Kejie
name: Qian, Ying
name: Gong, Jiaxing
name: Li, Zhiyong
name: Yu, Mengfei
name: Wang, Huiming
Publisher: name: figshare
Year: 2025
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Supplementary Material 1
Noise in disordered systems: The power spectrum and dynamic exponents in avalanche models
Creators: name: Kuntz, Matthew C.
name: Sethna, James P.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: For a long time, it has been known that the power spectrum of Barkhausen noise had a power-law decay at high frequencies. Up to now, the theoretical predictions for this decay have been incorrect, or have only applied to a small set of models. In this paper, we describe a careful derivation of the power spectrum exponent in avalanche models, and in particular, in variations of the zero-temperature random-field Ising model. We find that the naive exponent, (3-tau)/(sigma nu z), which has been derived in several other papers, is in general incorrect for small tau, when large avalanches are common. (tau is the exponent describing the distribution of avalanche sizes, and (sigma nu z) is the exponent describing the relationship between avalanche size and avalanche duration.) We find that for a large class of avalanche models, including several models of Barkhausen noise, the correct exponent for tau<2 is 1/(sigma nu z). We explicitly derive the mean-field exponent of 2. In the process, we calculate the average avalanche shape for avalanches of fixed duration and scaling forms for a number of physical properties.
description: 16 pages, 12 figures
Experimental implementation of a Raman-assisted six-quanta process
Creators: name: Mundhada, S. O.
name: Grimm, A.
name: Venkatraman, J.
name: Minev, Z. K.
name: Touzard, S.
name: Frattini, N. E.
name: Sivak, V. V.
name: Sliwa, K.
name: Reinhold, P.
name: Shankar, S.
name: Mirrahimi, M.
name: Devoret, M. H.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Nonlinear processes in the quantum regime are essential for many applications, such as quantum-limited amplification, measurement and control of quantum systems. In particular, the field of quantum error correction relies heavily on high-order nonlinear interactions between various modes of a quantum system. However, the required order of nonlinearity is often not directly available or weak compared to dissipation present in the system. Here, we experimentally demonstrate a route to obtain higher-order nonlinearity by combining more easily available lower-order nonlinear processes, using a generalization of the Raman transition. In particular, we show a transformation of four photons of a high-Q superconducting resonator into two excitations of a superconducting transmon mode and vice versa. The resulting six-quanta process is obtained by cascading two fourth-order nonlinear processes through a virtual state. We expect this type of process to become a key component of hardware efficient quantum error correction using continuous-variable error correction codes.
description: 13 pages, 5 figures
title: ADCO, Huitième cartulaire de Saint-Étienne de Dijon (1661-1667), Cart. 31 (G 135), 549 folios, f. 0840
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Huitième cartulaire de Saint-Étienne de Dijon (1661-1667), Archives départementales de la Côte-d'Or, Cart. 31 (G 135), 549 folios, f. 0840, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Huitième cartulaire de Saint-Étienne de Dijon (1661-1667), Archives départementales de la Côte-d'Or, Cart. 31 (G 135), 549 folios, f. 0840, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
Augmented Reality Using Cuboid Tracking as a support for Early Stages of Architectural Design
Creators: name: Souza, Larissa Negris de
name: Cuperschmid, Ana Regina
name: Moreira, Daniel de Carvalho
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 330102
subject: Architectural design
classificationCode: 330101
subject: Architectural computing and visualisation methods

description: Augmented Reality (AR) has the potential to alter the elaboration of architectural design, which relates to the cognition of representation, visualization, and perception. From the earliest stages of design, the study of relationships, zoning, and overall dimensions of the forms according to user needs is required and carried out using graphic representations where basic geometries are more important than structured ones. Several structured methods for design briefing exist. However, the importance and originality of this study are that it explores a new approach for such a phase coupling the acquired knowledge of traditional methods, contemporary technology and the positive evidence of working with 3D virtual models. The goal of our article was to develop an AR app using a three-dimensional marker inspired by the Rubik’s Cube app and evaluate its performance. This is part of a bigger pursuit towards developing an AR app to be used for internal design consultation by architects, to support early stages of architectural design. We used the concept of patterns by Alexander et al. (1977) to outline the geometric forms and associations used. Applying the Design Science Research methodology, an AR application was developed in Unity Engine with Vuforia SDK and tested via smartphone. This proposal intended to offer a tool that allowed interactions with a physical marker to visualize different combinations of features. The tool's functionality was assessed by verifying the readability and precision of the reconfigurable 3D marker. The results indicated a low level of hits achieved when tracking the cuboid. To use AR in the early stages of architectural design, first, the system must provide consistent information and appropriate feedback. Nevertheless, from our framework, we conclude that it sets the ground for looking deep into AR tools for briefing design.
Additional file 1: of Evolutionary analysis of rabies virus isolates from Guangxi Province of southern China
Creators: name: Wei, Xian-Kai
name: He, Xiao-Xia
name: Pan, Yan
name: Liu, Cheng
name: Tang, Hai-Bo
name: Zhong, Yi-Zhi
name: Li, Xiao-Ning
name: Liang, Jing-Jing
name: Luo, Ting
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Table S1. Reference sequences of Lyssaviruses used in the present study. (DOC 282 kb)
Particle level screening of scalar forces in 1+1 dimensions
Creators: name: Burrage, Clare
name: Elder, Benjamin
name: Millington, Peter
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate how non-linear scalar field theories respond to point sources. Taking the symmetron as a specific example of such a theory, we solve the non-linear equation of motion in one spatial dimension for (i) an isolated point source and (ii) two identical point sources with arbitrary separation. We find that the mass of a single point source can be screened by the symmetron field, provided that its mass is above a critical value. We find that two point sources behave as independent, isolated sources when the separation between them is large, but, when their separation is smaller than the symmetron's Compton wavelength, they behave much like a single point source with the same total mass. Finally, we explore closely related behavior in a toy Higgs-Yukawa model, and find indications that the maximum fermion mass that can be generated consistently via a Yukawa coupling to the Higgs in 1+1 dimensions is roughly the mass of the Higgs itself, with potentially intriguing implications for the hierarchy problem.
description: 13 pages, 4 figures
Synthesis of a protected ribonucleoside phosphoramidite-linked spin label via an alkynyl chain at the 5′ position of uridine
Creators: name: Hatano, Akihiko
name: Terado, Nanae
name: Kanno, Yuichi
name: Nakamura, Toshikazu
name: Kawai, Gota
Publisher: name: Taylor & Francis
Year: 2019
Subjects: Biochemistry
Medicine
Biotechnology

description: New, spin-labeled nucleosides, and an efficient synthetic route for a modified uridine amidite, were developed. The spin-labeled part was the 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) group, which was linked via an alkynyl chain at the 5 position of uridine. Three typical protecting groups, the t-butyldimethylsilyl (TBDMS) group at 2′, the dimethoxytrityl (DMTr) group at 5′, and the phosphoramidite group at 3′, were introduced to produce an automated nucleic acid synthesizer. The TEMPO group at the 5 position in the uridine structure affected introduction of bulky protecting groups, such as the DMTr group at the 5′ position and the TBDMS group at the 2′ position. The electron paramagnetic resonance (EPR) data revealed a nitroxyl radical in the structure of synthetic nucleoside compounds; however, RNA produced by automated synthesis using a TEMPO-linked uridine phosphoramidite building block was EPR silent.
A convenient route to 1,3-diynes using ligand-free Cadiot–Chodkiewicz coupling reaction at room temperature under aerobic conditions
Creators: name: Sujatha Asha
name: Sasidharan Anjana
name: Anns Maria Thomas
name: Minu Elizabeth Thomas
name: K. R. Rohit
name: K. Keerthi Krishnan
name: Sankuviruthiyil M Ujwaldev
name: Gopinathan Anilkumar
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: In this study, we report a copper-catalyzed ligand-free Cadiot–Chodkiewicz coupling reaction. No additives or ligands are required for this Cu-catalyzed C(sp)–C(sp) coupling reaction of terminal alkynes with alkynyl halides. The low cost of copper catalyst, excellent yield of the products, suppression of side-products and mild reaction conditions are the major advantages of this protocol.
Quantum Dynamics Beyond the Gaussian Approximation
Creators: name: Cheetham, Gareth J.
name: Copeland, E. J.
Publisher: name: arXiv
Year: 1995
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The time dependent quantum variational principle is emerging as an important means of studying quantum dynamics, particularly in early universe scenarios. To date all investigations have worked within a Gaussian framework. Here we present an improved method which is demonstrated to be superior to the Gaussian approach and may be naturally extended to the field--theoretic case.
description: 9 pages, 2 compressed Postscript figures included, requires epsf.tex
An efficient and practical asymmetric synthesis of (−)-tasimelteon
Creators: name: Wenbing Wang
name: Xiangwei Meng
name: Jianrong Zhu
name: Xingxian Zhang
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Plant Biology

description: Tasimelteon is a useful drug for the treatment of Non-24 in totally blind individuals. An efficient and convenient asymmetric synthesis of tasimelteon has been developed from 4-vinyl-2,3-dihydrobenzofuran through six steps in 53% overall yield using the Corey-Bakshi-Shibata (CBS0 asymmetric reduction of ketone as a key step.
ВЛИЯНИЕ СТРУКТУРЫ ПОРОВОГО ПРОСТРАНСТВА НА ФИЛЬТРАЦИОННО-ЕМКОСТНЫЕ СВОЙСТВА ОПОКОВИДНЫХ ОТЛОЖЕНИЙ БЕРЕЗОВСКОЙ СВИТЫ
Creators: name: И.О. Ошняков
name: И.О. Закоулова
Publisher: name: Вестник Академии наук Республики Башкортостан
Year: 2021
Subjects: ОКТ (опал
кристобалит
тридимит)
опоки
биогенный кремнезем
хемогенный кремнезем
ФИП/РЭМ
компьютерная микротомография
моделирование пустотного пространства
петротипы
проницаемость
ИНС (искусственные нейронные сети)
карты Кохонена

description: Отложения березовской свиты относятся к низкопроницаемым, сложнопостроенным и по различию минеральнокомпонентного состава разделяются на верхнюю и нижнюю подсвиты. Верхнеберезовская подсвита представлена глинисто-кварцевыми породами, по своим свойствам схожими с традиционными коллекторами. Что касается нижнеберезовской подсвиты, то ее особенностью является присутствие ОКТ (опал, кристобалит, тридимит) минералов, значительно изменяющих как фильтрационно-емкостные свойства, так и стандартные подходы к расчету основных подсчетных параметров. Опоковидные отложения березовской свиты относятся к биогенно-хемогенному виду. Коллекторы в таких отложениях имеют не стандартный гранулярный тип, а сложную структуру порового пространства, представленную мелкими порами, в частном случае с наличием естественной трещиноватости. Для повышения эффективности ввода в разработку пластов березовской свиты необходимо с детальной точностью изучить структуру порового пространства и фильтрационные свойства отложений. В качестве исходного материала были использованы мини-образцы керна из всего интервала березовской свиты, что позволило в дальнейшем охарактеризовать не только перспективные объекты, но и подстилающие породы. В данной работе рассматриваются особенности структуры пустотного пространства при изучении пород на мезо-, микрои наноуровне, влияние изменчивости структуры на фильтрационно-емкостные свойства пород, а также комплексирование полученных данных со стандартными исследованиями керна и записью ГИС по скважинам. Полученные результаты помогли найти ответы на ряд вопросов, не поддающихся объяснению при исследовании стандартными подходами.
Optical vortices as a message carrier in ternary-biased Simultaneous Message Passing protocol
Creators: name: Wroński, Jakub
Publisher: name: Zenodo
Year: 2024

description: The materials presented here consist of an abstract and presentations that were prepared and delivered at an international conference in Armenia (11th International Symposium on Optics and its Applications), which took place on 11-15 July 2023.
Pseudogap Induced Antiferromagnetic Spin Correlation in High-Temperature Superconductors
Creators: name: Sakai, Toru
name: Takahashi, Yoshinori
Publisher: name: arXiv
Year: 2000
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The pseudogap phenomena observed on cuprate high temperature superconductors are investigated based on the exact diagonalization method on the finite cluster t-J model. The results show the presence of the gap-like behavior in the temperature dependence of various magnetic properties; the NMR relaxation rate, the neutron scattering intensity and the static susceptibility. The calculated spin correlation function indicates that the pseudogap behavior arises associated with the development of the antiferromagnetic spin correlation with decreasing the temperature. The numerical results are presented to clarify the model parameter dependence, that covers the realistic experimental situation. The effect of the next-nearest neighbor hopping $t'$ is also studied.
description: 7 pages, Revtex, with 10 eps figures, to appear in J. Phys. Soc. Jpn. (Vol. 70, No. 1)
Carbon-SO3H catalyzed expedient synthesis of new spiro-[indeno[1,2-b]quinoxaline-[11,2′]-thiazolidine]-4′-ones as biologically important scaffold
Creators: name: Singh, Ruby
name: Ganaie, Shakeel Ahmad
name: Aakash Singh
name: Chaudhary, Archana
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified

description: In this report, we have described a convenient and eco-compatible approach for synthesis of new hybrid spiro[indeno[1,2-b]quinoxaline-[11,2′]-thiazolidine]-4′-ones (4a-k) via multi-component reaction of indeno[1,2-b]quinoxalinone, α-mercaptocarboxylic acids and various types of amines using urea-choline chloride as green deep eutectic solvent and carbon-SO3H as a solid acid catalyst. This new protocol produces a thiazolidine ring attached to indeno[1,2-b]quinoxaline through spiro carbon in good to excellent yields. The advantages of this protocol are avoidance of toxic and harmful catalyst and solvents further both catalyst and DES were recovered from the reaction mixture quantitatively and reused several times. Synthesized compounds were characterized on the basis of spectral and single crystal X-ray analysis. The prepared catalyst was characterized by FT-IR, SEM, and X-ray diffraction method.
ИССЛЕДОВАНИЕ ПАРАМЕТРИЧЕСКОЙ ЧУВСТВИТЕЛЬНОСТИ ТЕМПЕРАТУРНОГО ПОЛЯ В ПЛАСТЕ С ТРЕЩИНОЙ ГИДРОРАЗРЫВА
Creators: name: Ф.Ф. Давлетшин
name: Р.Ф. Шарафутдинов
Publisher: name: Вестник Академии наук Республики Башкортостан
Year: 2021
Subjects: термометрия
нестационарное температурное поле
трещина гидроразрыва
ширина трещины
длина трещины
диагностика
адиабатический эффект
эффект Джоуля-Томсона

description: В настоящее время одним из наиболее распространенных методов увеличения нефтеотдачи продуктивных пластов является гидравлический разрыв пласта. Важной задачей является контроль качества его проведения и оценка параметров закрепленной трещины. Для решения задач диагностики продуктивных пластов и технического состояния скважин широкое распространение получил метод термометрии, основанный на температурных исследованиях в стволе скважины. В данной работе на основе результатов математического моделирования исследуется формирование нестационарного температурного поля в пласте с трещиной гидроразрыва при эксплуатации добывающей скважины, с точки зрения диагностики параметров трещины гидроразрыва по данным измерения нестационарной термометрии. По результатам исследований установлено, что параметры трещины гидроразрыва оказывают существенное влияние на температурное поле притекающей в скважину жидкости. Показано, что форма температурной кривой, регистрируемой в скважине напротив трещины гидроразрыва, определяется взаимовлиянием эффектов адиабатического охлаждения и дроссельного нагрева за счет эффекта Джоуля-Томсона. Установлен нелинейный характер изменения температуры притекающей жидкости во времени: в первоначальный момент времени после пуска скважины температура снижается относительно пластовой вследствие проявления адиабатического эффекта, дальнейший характер температурного поля зависит от параметров трещины гидроразрыва: для узких и длинных трещин наблюдается положительная динамика температуры и положительная температурная аномалия в стволе скважины, для широких и коротких трещин формируются отрицательные температурные аномалии. Величина положительной температурной аномалии растет по мере снижения ширины и увеличения длины трещины. Механизм повышения температуры связан с ростом градиента давления в трещине при увеличении ее длины и уменьшении ширины, в результате чего возрастает вклад эффекта Джоуля-Томсона в формирование температуры притекающей в скважину жидкости. Рассмотренные особенности температурного поля могут быть использованы при диагностике параметров трещины гидроразрыва.