bluuebunny/crossref_metadata_2025 huggingface dataset:
Art Critique in the Pages of the Newspaper “For Socialist Realism”
Authors:   The Research Institute of Theory and History of Fine Arts of the Russian Academy of Arts, Gracheva Svetlana ,   St Petersburg Repin Academy of Fine Arts
Published: December 2023

In the 1930s–1950s, there existed a truly unique publication in Leningrad – the newspaper “For Socialist Realism”, which was the official organ of the All-Russian Academy of Arts and later became the organ of the Academy of Arts of the USSR. It was also the press organ of The I.E.Repin Institute of the Academy of Arts of the USSR. It was published from 1934 to 1941, then its publication resumed in 1945 and continued until 1954. The newspaper’s pages reflected all the major events of the Academy during this period, connected both to the cultural strategies of the Soviet state and the internal life of the Academy. Artistic and critical issues were discussed in various publications by art historians, artists and educators. Among the authors of this time featured in the newspaper were I.I. Brodsky, A.M. Gerasimov, E.F. Gollerbach, I.E. Grabar, S.K. Isakov, B.V. Ioganson, A.L. Kaganovich, P.E. Kornilov, S.V. Korovkevich, N.N. Punin etc. This article analyzes the newspaper’s activity, critical articles of that time, their reflection of the cultural paradigm of the era, and provides an assessment of the work of individual representatives of Russian art.
Literary Magazines Na Postu and Na Literaturnom Postu about art exhibitions and artistic creativity of the first post-revolutionary decade
Authors:   Stroganov Russian State University of Design and Applied Arts, Guseynov Vagif
Published: December 2023

The article analyzes the reviews of book graphics published on the pages of the magazines “Na Postu” and “Na Literaturnom Postu”, reviews of exhibitions of sculpture and painting that took place during the restoration period before the beginning of the reconstruction era (1923‒1927). The process of developing a conceptual apparatus by proletarian art criticism, designed to serve as a description and interpretation of the class content of works of fine art, is shown. The author notes the parallelism of the literary and artistic critical ideological tools formed in the first half of the New Economic Policy (1921–1928). The dependence of proletarian art critics on the ideological agenda of literary critics of the Na Postu magazines is explained by the urgent task, which was the need to create art and science suitable for the perception and cultural education of the broad working masses.
Exhibition “Valentina Kuznetsova and her students”
Authors:   Research Institute of Theory and History of Fine Arts, Russian Academy of Arts, Kazakova Lyudmila
Published: December 2023

The article discusses a ceramic exhibition that took place in the inner courtyard of the Russian Academy of Arts in 2023. V.G. Kuznetsova and her students presented an interesting collaborative project on the theme of Vladimir-Suzdal white-stone carving, as well as individual works by each artist. The sculpture and art object exposition in the open space was perceived in harmony and unity with nature.
Landscape in Russian Art in the Second Half of the 19th – the Beginning of the 20th Century. Evolution of a Genre: Range of Issues
Authors:   Research Institute of Theory and History of Fine Arts, Davydova Olga
Published: December 2023

The article is devoted to the conceptual analysis of the multifaceted evolution of the landscape genre in Russian art in the second half of the 19th – early 20th century. The author poses and investigates in detail the key question of interrelationship of landscape poetics with the artists’ world view and aesthetic guidelines of the time influencing the perception of nature and its reflections in art. The academic and practical foundation of the article consists of the tasks, results and development prospects of the topic of the international conference with the same title “Landscape in Russian Art in the Second Half of the 19th – the Beginning of the 20th Century. Evolution of a Genre” (May 16–17, 2022, Russian Academy of Arts, Moscow), curated by the author.
On the Romantic Tendencies in Russian Landscape Painting of the Second Half of the 19th Century (A.K. Savrasov, F.A. Vasiliev, A.I. Kuindzhi)
Authors:   State Tretyakov Gallery, Churak Galina
Published: December 2023

The paper discusses the works of A.K. Savrasov, A.F. Vasiliev and A.I. Kuindzhi aiming to explore romantic trends ever present in the art of the second half of the 19th century. The use of romantic style by positivistic masters evidences continuity in the evolution of the artistic process. Artists’ unique individuality suggests that they did not scholastically borrow certain expressive devices from their precursors, but creatively developed romantic techniques, empowering the evolution of art by further schools and generations.
Night city landscapes in the works of Russian artists of the late 19th – early 20th century. Iconographic notes
Authors:   State Tretyakov Gallery, Manucharova Daria
Published: December 2023

The article examines understudied aspects of the work of Russian artists of the modern era related to the depiction of urban landscapes with nighttime lighting. The image of the nocturnal city attracted many masters at the turn of the 19th and 20th centuries, who celebrated the lights of Paris (Konstantin Korovin, Nicolas Tarkhoff), the white nights, fireworks, as well as the non-parade aspects of life in St Petersburg (artists of the “World of Art” association), the illumination of the Moscow Kremlin during the coronation of Alexander III and Nicholas II (Vasily Surikov, Isaak Levitan). Both in the literature of that time and in the visual arts, the appeal to the motif of the night was associated with a shift in emphasis in the habitual, everyday perception of the city. Thanks to the contrast between natural moonlight and artificial electric lighting, the theme of the relationship between the natural and the human elements inherent in urban landscapes as a whole began to resonate more sharply in painting. In many works with nighttime lighting, the architectural and landscape features of a specific place are emphasized, while in others, the created image is generalized, and the obscuring form and color of the nocturnal darkness blur the distinctions between cities.
Impact of validated infographics on self-management among patients with type ii diabetes mellitus for prevention of chronic kidney disease in rural Kenya: Research Protocol
Authors: Maina Pauline , Reid Marianne , Pienaar Melanie
Published: December 2023

This protocol describes the process to be used during data collection.
Dimming the Lights: 2D Simulations of Deflagrations of Hybrid C/O/Ne White Dwarfs Using FLASH
Authors: Feldman Catherine , Gutierrez Nathanael , Eisenberg Ellis , Willcox Donald E. , Townsley Dean M. , Calder Alan C.
Published: December 2023

The dimmest and most numerous outlier of the Type Ia supernova population, the Type Iax event, is increasingly being found in the results of observational campaigns. There is currently no single accepted model to describe these events. This 2D study explores the viability of modeling Type Iax events as a hybrid C/O/Ne white dwarf progenitor undergoing a deflagration using the multiphysics software FLASH. This hybrid was created using the stellar evolution code MESA, and its C-depleted core and mixed structure have demonstrated lower yields than traditional C/O progenitors in previous deflagration-to-detonation studies. To generate a sample, 30 “realizations” of this simulation were performed, the only difference being the shape of the initial match head used to start the deflagration. Consistent with earlier work, these realizations produce the familiar hot dense bound remnant surrounded by sparse ejecta. Our results indicate that the majority of the star remains unburned (∼70%) and bound (>90%). Our realizations produce total ejecta yields on the order of 10−2–10−1
M
☉, ejected 56Ni yields on the order of 10−4–10−2
M
☉, and ejecta kinetic energies on the order of 1048–1049 erg. Compared to yields inferred from recent observations of the dimmest Type Iax events—SN 2007qd, SN 2008ha, SN 2010ae, SN 2019gsc, SN 2019muj, SN 2020kyg, and SN 2021fcg—our simulation produces comparable 56Ni yields but too-small total yields and kinetic energies. Reignition of the remnant is also seen in some realizations.
High-sensitivity Beamformed Observations of the Crab Pulsar's Radio Emission
Authors: Lin Rebecca , van Kerkwijk Marten H.
Published: December 2023

We analyzed four epochs of beamformed European VLBI Network data of the Crab Pulsar at 1658.49 MHz. With the high sensitivity resulting from resolving out the Crab Nebula, we are able to detect even the faint high-frequency components in the folded profile. We also detect a total of 65,951 giant pulses, which we use to investigate the rates, fluence, phase, and arrival time distributions. We find that for the main pulse component, our giant pulses represent about 80% of the total flux. This suggests we have a nearly complete giant pulse energy distribution, although it is not obvious how the observed distribution could be extended to cover the remaining 20% of the flux without invoking large numbers of faint bursts for every rotation. Looking at the difference in arrival time between subsequent bursts in single rotations, we confirm that the likelihood of finding giant pulses close to each other is increased beyond that expected for randomly occurring bursts—some giant pulses consist of causally related microbursts, with typical separations of ∼30 μs—but also find evidence that at separations ≳100 μs the likelihood of finding another giant pulse is suppressed. In addition, our high sensitivity enabled us to detect weak echo features in the brightest pulses (at ∼0.4% of the peak giant pulse flux), which are delayed by up to ∼300 μs.
Scale Invariance in Gamma-Ray Flares of the Sun and 3C 454.3
Authors: Peng Fang-Kun , Wei Jun-Jie , Wang Hai-Qin
Published: December 2023

Using the gamma-ray flare samples of the Sun and 3C 454.3 observed by the Fermi telescope, we investigate the statistical properties of sizes including fluence (energy), peak flux (luminosity), duration time, and waiting time in this work. We find that the cumulative distribution of the fluctuations of these sizes follow well the Tsallis q-Gaussian function. The obtained q values from q-Gaussian distribution remain stable around 2 without any significant change, implying that there is a scale invariance structure in gamma-ray flares of the Sun and 3C 454.3. This scale invariance characteristics of the Sun and 3C 454.3 indicated by q values are also comparable to those of earthquakes, soft gamma repeaters, fast radio burst (FRB 20121102), and X-ray flares of gamma-ray bursts. On top of that, we verify the relationship between q values and the power-law indices α from the size frequency distributions, which is expressed as q = (α + 2)/α. These statistical findings could be well explained within the physical framework of a self-organizing criticality system.
Explaining the Chemical Inventory of Orion KL through Machine Learning
Authors: Scolati Haley N. , Remijan Anthony J. , Herbst Eric , McGuire Brett A. , Lee Kin Long Kelvin
Published: December 2023

The interplay of the chemistry and physics that exists within astrochemically relevant sources can only be fully appreciated if we can gain a holistic understanding of their chemical inventories. Previous work by Lee et al. demonstrated the capabilities of simple regression models to reproduce the abundances of the chemical inventory of the Taurus Molecular Cloud 1 (TMC-1), as well as to provide abundance predictions for new candidate molecules. It remains to be seen, however, to what degree TMC-1 is a “unicorn” in astrochemistry, where the simplicity of its chemistry and physics readily facilitates characterization with simple machine learning models. Here we present an extension in chemical complexity to a heavily studied high-mass star-forming region: the Orion Kleinmann–Low (Orion KL) nebula. Unlike TMC-1, Orion KL is composed of several structurally distinct environments that differ chemically and kinematically, wherein the column densities of molecules between these components can have nonlinear correlations that cause the unexpected appearance or even lack of likely species in various environments. This proof-of-concept study used similar regression models sampled by Lee et al. to accurately reproduce the column densities from the XCLASS fitting program presented by Crockett et al.
The Close AGN Reference Survey (CARS): An Interplay between Radio Jets and AGN Radiation in the Radio-quiet AGN HE0040-1105
Authors: Singha M. , Winkel N. , Vaddi S. , Perez Torres M. , Gaspari M. , Smirnova-Pinchukova I. , O’Dea C. P. , Combes F. , Omoruyi Osase , Rose T. , McElroy R. , Husemann B. , Davis T. A. , Baum S. A. , Lawlor-Forsyth C. , Neumann J. , Tremblay G. R.
Published: December 2023

We present a case study of HE 0040-1105, an unobscured radio-quiet active galactic nucleus (AGN) at a high accretion rate of λ
Edd = 0.19 ± 0.04. This particular AGN hosts an ionized gas outflow with the largest spatial offset from its nucleus compared to all other AGNs in the Close AGN Reference Survey. By combining multiwavelength observations from the Very Large Telescope/MUSE, Hubble Space Telescope/Wide Field Camera 3, Very Large Array, and European VLBI Network, we probe the ionization conditions, gas kinematics, and radio emission from host galaxy scales to the central few parsecs. We detect four kinematically distinct components, one of which is a spatially unresolved AGN-driven outflow located within the central 500 pc, where it locally dominates the interstellar medium conditions. Its velocity is too low to escape the host galaxy’s gravitational potential, and may be re-accreted onto the central black hole via chaotic cold accretion. We detect compact radio emission in HE 0040-1105 within the region covered by the outflow, varying on a timescale of ∼20 yr. We show that neither AGN coronal emission nor star formation processes wholly explain the radio morphology/spectrum. The spatial alignment between the outflowing ionized gas and the radio continuum emission on 100 pc scales is consistent with a weak jet morphology rather than diffuse radio emission produced by AGN winds. >90% of the outflowing ionized gas emission originates from the central 100 pc, within which the ionizing luminosity of the outflow is comparable to the mechanical power of the radio jet. Although radio jets might primarily drive the outflow in HE 0040-1105, radiation pressure from the AGN may contribute to this process.
Probing the Galactic Diffuse Continuum Emission with COSI
Authors: Karwin Christopher M. , Siegert Thomas , Beechert Jacqueline , Tomsick John A. , Porter Troy A. , Negro Michela , Kierans Carolyn , Ajello Marco , Martinez-Castellanos Israel , Shih Albert , Zoglauer Andreas , Boggs Steven E. ,   (for the COSI Collaboration)
Published: December 2023

In 2016, the Compton Spectrometer and Imager (COSI) had a successful 46 day flight on board NASA’s Super Pressure Balloon platform. In this work, we report measurements of the Galactic diffuse continuum emission (GDCE) observed toward the inner Galaxy during the flight, which in the COSI energy band (0.2–5 MeV) is primarily generated from inverse Compton radiation. Within uncertainties, we find overall good agreement with previous measurements from INTEGRAL/SPI and COMPTEL. Based on these initial findings, we discuss the potential for further probing the GDCE with the 2016 COSI balloon data, as well as prospects for the upcoming satellite mission.
Direct Statistical Constraints on the Natal Kick Velocity of a Black Hole in an X-Ray Quiet Binary
Authors: Banagiri Sharan , Doctor Zoheyr , Kalogera Vicky , Kimball Chase , Andrews Jeff J.
Published: December 2023

In recent years, a handful of “dark” binaries have been discovered with a nonluminous compact object. Astrometry and radial velocity measurements of the bright companion allow us to measure the post-supernova orbital elements of such a binary. In this paper, we develop a statistical formalism to use such measurements to infer the pre-supernova orbital elements, and the natal kick imparted by the supernova (SN). We apply this formalism to the recent discovery of an X-ray quiet binary with a black hole, VFTS 243, in the Large Magellanic Cloud. Assuming an isotropic, Maxwellian distribution on natal kicks and using broad agnostic mass priors, we find that kick velocity can be constrained to V

k
< 72 km s−1 at 90% confidence. We find that a Blaauw kick cannot be ruled out, and that at least about 0.6M
⊙ was lost during the supernova with 90% confidence. The pre-SN orbital separation is found to be robustly constrained to be around 0.3 au.
NuSTAR Hard X-Ray Monitoring of Gravitationally Lensed Quasar RX J1131–1231
Authors: DeFrancesco Cora A. , Dai Xinyu , Mitchell Mark , Zoghbi Abderahmen , Morgan Christopher W.
Published: December 2023

The X-ray emission from active galactic nuclei is believed to come from a combination of inverse Compton scattering of photons from the accretion disk and reprocessing of the direct X-ray emission by reflection. We present hard (10–80 keV) and soft (0.5–8 keV) X-ray monitoring of a gravitationally lensed quasar RX J1131−1231 (hereafter RXJ1131) with NuSTAR, Swift, and XMM-Newton between 2016 June 10 and 2020 November 30. Comparing the amplitude of quasar microlensing variability at the hard and soft bands allows a size comparison, where larger sources lead to smaller microlensing variability. During the period between 2018 June 6 and 2020 November 30, where both the hard and soft light curves are available, the hard and soft bands varied by factors of 3.7 and 5.5, respectively, with rms variability of 0.40 ± 0.05 and 0.57 ± 0.02. Both the variability amplitude and rms are moderately smaller for the hard X-ray emission, indicating that the hard X-ray emission is moderately larger than the soft X-ray emission region. We found the reflection fraction from seven joint hard and soft X-ray monitoring epochs is effectively consistent with a constant with low significance variability. After decomposing the total X-ray flux into direct and reprocessed components, we find a smaller variability amplitude for the reprocessed flux compared to the direct emission. The power-law cutoff energy is constrained at

96

−
24

+
47

keV, which positions the system in the allowable parameter space due to the pair production limit.
Calibration of the Timing Performance of GECAM-C
Authors: Xiao Shuo , Liu Ya-Qing , Gong Ke , An Zheng-Hua , Xiong Shao-Lin , Li Xin-Qiao , Wen Xiang-Yang , Peng Wen-Xi , Zhang Da-Li , Tuo You-Li , Zheng Shi-Jie , Song Li-Ming , Wang Ping , Zhao Xiao-Yun , Huang Yue , Ma Xiang , Liu Xiao-Jing , Qiao Rui , Xu Yan-Bing , Yang Sheng , Zhang Fan , Wang Yue , Zhang Yan-Qiu , Xue Wang-Chen , Liu Jia-Cong , Zheng Chao , Wang Chen-Wei , Tan Wen-Jun , Cai Ce , Yi Qi-Bin , Zhang Peng , Luo Xi-Hong , Yang Jiao-Jiao , Zhi Qi-Jun , Dong Ai-Jun , Dang Shi-Jun , Shang Lun-Hua , Zhang Shuang-Nan
Published: December 2023

As a new member of the Gravitational-wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) after GECAM-A and GECAM-B, GECAM-C (originally called HEBS), which was launched on board the SATech-01 satellite on 2022 July 27, aims to monitor and localize X-ray and gamma-ray transients from ∼6 keV to 6 MeV. GECAM-C utilizes a similar design to GECAM but operates in a more complex orbital environment. In this work, we utilize the secondary particles simultaneously produced by the cosmic-ray events on orbit and recorded by multiple detectors to calibrate the relative timing accuracy between all detectors of GECAM-C. We find the result is 0.1 μs, which is the highest time resolution among all GRB detectors ever flown and very helpful in timing analyses such as minimum variable timescale and spectral lags, as well as in time delay localization. Besides this, we calibrate the absolute time accuracy using the one-year Crab Pulsar data observed by GECAM-C and Fermi’s Gamma-ray Burst Monitor, as well as GECAM-C and GECAM-B. The results are 2.02 ± 2.26 μs and 5.82 ± 3.59 μs, respectively. Finally, we investigate the spectral lag between the different energy bands of the Crab Pulsar observed by GECAM and the Gamma-ray Burst Monitor, which is ∼ −0.2 μs keV−1.
Coronal Loop Detection Using Multiscale Convolutional Neural Networks
Authors: Wang Yunzhi , Liang Bo , Feng Song
Published: December 2023

Solar magnetic fields play an important role in many solar activities, such as the solar wind, coronal mass ejections, and coronal oscillation. Coronal loops are curvilinear structures in the solar atmosphere and are closely related to coronal magnetic fields, so the study of their structure is very important. However, it is difficult to identify coronal loops accurately because of the complexity of their features. Therefore, we propose a two-stage detection method, using multiscale convolutional neural networks, to identify coronal loops. The regions including initial coronal loops are first marked by a improved Res-UNet model. The loop structures in the region are then detected using a improved dense extreme inception network for edge detection model. We selected the coronal images observed by the Transition and Coronal Explorer and the Atmospheric Imaging Assembly of the Solar Dynamics Observatory in the 171 Å channel to illustrate the detection processing. Meanwhile, we also compared the accuracy of our method to others. The results demonstrate that our proposed method has a high recognition rate and good robustness over previous identification methods and can be used to study the physical characteristics of coronal loops.
The Jets and the Neutron Star Kick Velocity of the Supernova Remnant CTB 1
Authors: Bear Ealeal , Soker Noam
Published: December 2023

We identify jet-shaped morphology in the core-collapse supernova remnant (SNR) CTB 1 that includes two opposite structural features. We identify these as the imprints of a pair of jets that were among the last jets to explode the massive stellar progenitor of CTB 1. We find the projected angle between the jets’ axis and the direction of the pulsar velocity, which is the neutron star natal kick, to be α = 78°. We tentatively identify possible signatures of a second pair of opposite jets along a different direction. If this identification holds, SNR CTB 1 has a point-symmetric structure. The morphology and large angle of the jets’ axis to kick velocity are expected in the jittering jets explosion mechanism of core-collapse supernovae.
Análise Preliminar de Riscos (APR) aplicada as atividades desenvolvidas por trabalhadores do complexo do Ver-o-Peso, Belém/PA
Authors: Pinheiro Cézar Di Paula Da Silva , Torres Leandro Marques , Azevedo Sarah Dias , Rosa Amanda Gama
Published: December 2023

A quantidade de mercados e feiras livres no município de Belém/PA vem se multiplicando de forma considerável. Estas possuem uma dinâmica de formação e funcionamento bastante particular, apresentando, muita das vezes, péssimas condições de trabalho com pouca ou nenhuma higiene e segurança. O objetivo da pesquisa foi a identificação dos agentes de risco nas atividades desenvolvidas por trabalhadores do Complexo do Ver-o-Peso, Belém/PA, através da técnica de Análise Preliminar de Riscos. Foi realizada revisão bibliográfica e visitas in loco durante o mês de outubro de 2020. No total, foram identificados 27 potenciais perigos associados a diferentes atividades desenvolvidas pelos trabalhadores. Tais perigos estão relacionados aos agentes de riscos físicos, químicos, biológicos, ergonômicos e mecânicos ou de acidentes. A origem dos riscos encontrados advém de distintos elementos do processo de trabalho como: materiais, equipamentos, conforto acústico e térmico, instalações e iluminação. O risco biológico apresentou-se como maior potencial de risco para os trabalhadores locais. Os riscos físicos, químicos e a maior parte dos agentes ergonômicos e mecânicos ou de acidentes apresentam potencial de risco moderado. Revelou-se a necessidade da ação do poder público voltado ao treinamento e capacitação dos profissionais, além de melhorias na estrutura física do complexo.
Estratégias da secretaria municipal da saúde de Curitiba em resposta à pandemia decorrente do coronavírus e as lições da crise sanitária
Authors: Ribeiro Carmen Fernanda , Carvalho Hilda Alberton de
Published: December 2023

O estudo está fundamentado na análise da gestão dos serviços municipais de saúde de Curitiba na crise sanitária ocasionada pelo coronavírus. O objetivo da investigação foi analisar as estratégias adotadas durante o período pandêmico e identificar as respostas à emergência em saúde pública que serão incorporadas na rotina dos serviços. A pandemia pressionou o sistema de saúde, expondo suas vulnerabilidades, e exigiu a criação de mecanismos para a superação da crise e adoção de modelos assistenciais mais promissores. A metodologia deste estudo foi baseada em uma pesquisa de abordagem qualitativa, de natureza aplicada, de caráter descritiva quanto aos seus objetivos, e procedimentos bibliográficos, documentais e pesquisa de campo foram adotados para sua construção. Optou-se pela realização de uma revisão integrativa de literatura para o estudo de caso. Os resultados encontrados na pesquisa remetem as boas práticas na gestão dos serviços ofertados pela Secretaria Municipal da Saúde de Curitiba para o fortalecimento de todo sistema público de saúde e na identificação de experiências de sucesso na condução da crise, as quais formam um conjunto de estratégias que poderão ser replicadas em outros sistemas de saúde para instrumentalizar a gestão, conduzir o planejamento das ações e subsidiar a formulação de políticas públicas de saúde.
Análise do emprego formal nos municípios paranaenses – 2006 a 2018
Authors: Manini Simone Moro , Cordeiro Pedro Sbaraini , Piacenti Carlos Alberto
Published: December 2023

Este estudo teve como objetivo a investigação das principais variáveis que afetaram o emprego formal dos municípios paranaenses no período de 2006 a 2018. A metodologia utilizada foi o modelo de dados em painel, baseado no estudo de Carnevale (2016), com acréscimo de mais duas variáveis relacionadas ao tema. A variável dependente foi o emprego formal e as variáveis independentes aplicadas foram: escolaridade média, salários médios, Produto Interno Bruto per capita, população, Valor Adicionado Bruto a preços correntes da agropecuária, da indústria, dos serviços, da administração pública e taxa de mortalidade. Os resultados demonstraram que as variáveis que influenciaram positivamente o nível de emprego no Estado foram o salário médio, o PIB per capita e o Valor Adicionado da indústria e dos serviços. As que influenciaram negativamente foram a escolaridade, Valor Adicionado da agropecuária e mortalidade. Sendo assim, os resultados visam a contribuir para a elaboração de políticas públicas voltadas para o fomento da concepção de emprego e renda na região estudada.
Recursos hídricos e desenvolvimento rural sustentável: um estudo no município de São Lourenço do Oeste/SC
Authors: Tonezer Cristiane , Smaniotto de Oliveira Loreci Catarina , Renk Arlene Anélia , Fossá Juliano Luiz
Published: December 2023

Este estudo tem como objetivo analisar a configuração dos recursos hídricos para o abastecimento rural de São Lourenço do Oeste, a fim de realizar uma “radiografia” da realidade hídrica e sanitária das propriedades rurais. A pesquisa caracteriza-se como quali-quanti, tendo como instrumentos para coleta de dados: a) questionário estruturado aplicado em 733 famílias, o que representa 48,20% das propriedades rurais de São Lourenço do Oeste; b) entrevista realizada com dois Agentes Comunitários de Saúde, dois representantes das Associações da Água e quatro Extensionistas Rurais. Como resultado observou-se que 41,20% das propriedades analisadas não possuem água suficiente, em períodos de estiagens. Dentre as nascentes, 20,10% das fontes e 65,19% dos poços com uso de bomba, necessitam de proteção; 22,65% das propriedades são abastecidas por poços artesianos. A água para dessedentação animal provém de fontes, poços com uso de bomba, rios/córregos e açudes. Essas informações evidenciam reais necessidades de estabelecimento de políticas públicas e/ou programas de ações continuadas de intervenções para a manutenção e proteção de nascentes, captação e armazenamento de águas pluviais para abastecimento hídrico no meio rural deste município. Tais ações são imprescindíveis para que haja equidade social e, consequentemente, um desenvolvimento rural sustentável.
The Early Pleistocene freshwater mollusks of the Denizli Basin (Turkey): a new long-lived lake fauna at the crossroads of Pontocaspian and Aegean-Anatolian realms
Authors: Neubauer Thomas A. , Wesselingh Frank P.
Published: December 2023

We describe here a newly discovered, diverse fossil fauna of freshwater gastropods and bivalves from the Denizli Basin in SW Turkey. The material was collected from the Kolankaya Formation, for which latest chronostratigraphic and magnetostratigraphic data indicate an Early Pleistocene age, which is much younger than previously assumed for the fossil-bearing strata of the Denizli Basin. The fauna consists of at least 27 species (25 gastropods, 2 bivalves) and includes a new genus,Harzhauseriagen. nov., and 6 new species within the Hydrobiidae: Falsipyrgula ? coronatasp. nov., Graecoanatolica ? alcicekorumsp. nov.,Harzhauseria schizopleuragen. et sp. nov.,Iraklimelania minutissimasp. nov.,Iraklimelania submediocarinatasp. nov., and Xestopyrguloides ? sagittasp. nov.Additionally, we define lectotypes forStaja orientalis(Bukowski, 1896) andValvata orientalisFischer, 1866, as well as a neotype forTheodoxus percarinatus(Oppenheim, 1919). Nine of the recovered species (33.3%) are only known from the Denizli Basin. Almost half of the fauna (44.7%) is endemic to the Aegean–Anatolian region, with biogeographical affinities to the Pliocene–Early Pleistocene faunas of Rhodes, Kos, and mainland Greece, as well as the Çameli and Eşen Basin in Turkey. On the genus level, the fauna also contains several typical Pontocaspian elements. The composition points toward a typical long-lived lake environment with oligohaline conditions.
Note sur la provenance de la statue colossale de Rome conservée au musée du Louvre (Ma 2345)
Authors: Szewczyk Martin
Published: December 2023

Le torse colossal de statue Ma 2345 du musée du Louvre a longtemps été dit sans provenance connue. Un examen critique des inventaires et de la tradition transmise par les catalogues et la reconnaissance de l’œuvre sur une série de dessins remontant au xvi e  siècle permettent au contraire d’affirmer que la sculpture provient de l’ Urbs , et de poser une hypothèse quant à l’identification de la collection dont elle provient.
Seven Tesla MRI in Alzheimer's disease research: State of the art and future directions: A narrative review
Authors: Perera Molligoda Arachchige Arosh S. , Garner Anton Kristoffer
Published: December 2023

Seven tesla magnetic resonance imaging (7T MRI) is known to offer a superior spatial resolution and a signal-to-noise ratio relative to any other non-invasive imaging technique and provides the possibility for neuroimaging researchers to observe disease-related structural changes, which were previously only apparent on post-mortem tissue analyses. Alzheimer's disease is a natural and widely used subject for this technology since the 7T MRI allows for the anticipation of disease progression, the evaluation of secondary prevention measures thought to modify the disease trajectory, and the identification of surrogate markers for treatment outcome. In this editorial, we discuss the various neuroimaging biomarkers for Alzheimer's disease that have been studied using 7T MRI, which include morphological alterations, molecular characterization of cerebral T2*-weighted hypointensities, the evaluation of cerebral microbleeds and microinfarcts, biochemical changes studied with MR spectroscopy, as well as some other approaches. Finally, we discuss the limitations of the 7T MRI regarding imaging Alzheimer's disease and we provide our outlook for the future.
¿Se puede considerar al perdón un acto social? Argumentos a favor y ventajas explicativas
Authors: Sánchez Barajas María del Pilar
Published: December 2023

Este artículo propone considerar el perdón como un acto social y muestra las ventajas explicativas de dicha perspectiva. En la primera parte del trabajo se revisa la definición de acto social planteada por Adolf Reinach, se presentan algunas objeciones a la consideración del perdón como acto social y se responde a ellas. En la segunda parte se exploran tres ventajas explicativas de esta propuesta: la primera, frente a la crítica de Nussbaum al perdón perverso, la segunda, frente a la crítica de Serrano y Cázares al perdón moralista, y, la tercera, en atención a la polisemia del perdón.
Rawlsianismo metodológico, teoría crítica y teoría política animal
Authors: Riquelme Peña Pedro
Published: December 2023

El objetivo de este trabajo es ofrecer una explicación sistemática de por qué la teoría política animal desarrollada en el marco del rawlsianismo metodológico tiene dificultades para ajustarse a los estándares de la justificación pública. Argumento, más específicamente, que el problema radica en que nuestra cultura política dificulta que los ciudadanos puedan adoptar una perspectiva coherente para reflexionar sobre los términos a través de los cuales deben conducirse las relaciones entre especies. Para salir de esta situación, sostengo, hay que introducir un giro metodológico, dándole mayor peso a la teoría social, lo que supone un paso del liberalismo a la teoría crítica.
Biopolítica y razón de fuerza mayor en Eduardo Nicol
Authors: Linares Salgado Jorge Enrique , Iglesias Granda José Manuel
Published: December 2023

En la obra de Nicol existe una concepción original de biopolítica que difiere de las teorías más conocidas. Parte de una concepción de la humanidad caracterizada por la tensión entre «comunidad histórica» y «especie natural»; y plantea una diferencia sustancial entre el mundo de la cultura-técnica-libertad vs. naturaleza biológica y necesidad. Nicol sostiene que en nuestra era la libertad humana decae, ya que la humanidad se está reduciendo a comportarse como una especie natural en lucha por su supervivencia ante la posibilidad de un colapso civilizatorio. Por ello, formula una concepción de biopolítica que no solo consiste en un mecanismo para imponer control biológico sobre poblaciones humanas, pues descubre una nueva dimensión biopolítica surgida del predominio de la «razón de fuerza mayor», razón sistemática de extrema necesidad, que surge como consecuencia del posible colapso civilizatorio que se extiende globalmente, y que ha sido desencadenada por la expansión del poder tecnológico y la destrucción ecológica. El desenlace de este colapso sería un impensable retroceso de la humanidad al nivel de una especie biológica en lucha por su supervivencia colectiva, con la consecuente pérdida de fines históricos y decisiones libremente elegidas. Se analizan estas tesis críticamente y se evalúa su validez y sus consecuencias teóricas.
La recepción de la obra de Juan Carlos Rodríguez: obstáculos y perspectivas. Estudio de caso: en torno a Journeys through the Ideological Unconscious (2022), de Malcolm K. Read
Authors: Bellón Aguilera José Luis
Published: December 2023

El presente trabajo examina la recepción de la obra del filósofo marxista e hispanista Juan Carlos Rodríguez Gómez (1942-2016), renovador del marxismo, por parte de un representante del hispanismo marxista anglosajón, el profesor Malcolm K. Read. El trabajo aborda su lectura centrándose en su último libro, pero haciendo referencias a otros trabajos anteriores. La obra de Read ofrece un punto de vista doblemente privilegiado, por el trabajo académico del autor entre la teoría y los estudios literarios y por su situación en el campo universitario anglosajón, para ver tanto la potencialidad como los obstáculos de la obra de Rodríguez para su recepción fuera de España (en el marxismo anglosajón), pero también sus dificultades en la recepción interna. El presente artículo señala los aciertos de sus análisis, los complementa y matiza con algunas observaciones.
La recepción de la Teoría crítica en España: una lectura en clave política
Authors: Romero Cuevas José Manuel
Published: December 2023

El presente artículo realiza un estudio de la recepción en España de la Teoría crítica de la Escuela de Fráncfort, desde la década de los 60 del siglo XX hasta la actualidad. La originalidad de este trabajo es su pretensión de analizar este proceso de recepción académica y cultural sobre el trasfondo de los grandes cambios políticos que afectaron al país en este periodo. Las modificaciones del contexto político han sido adoptadas aquí como una clave interpretativa adicional y complementaria a las interpretaciones intra-teóricas para iluminar en su complejidad y en sus sorprendentes vaivenes la recepción de esa corriente de pensamiento en nuestro país. El resultado es una consideración historizadora de las fases de esta recepción que posibilita y pretende impulsar una reflexión crítica de los investigadores de este ámbito sobre su pasado y su presente.
Recordar a Kropotkin. Contra el factor competencia
Authors: Castro Orellana Rodrigo
Published: December 2023

El artículo se inicia con un análisis acerca de la relación que Hayek establece entre los fundamentos del liberalismo clásico y las teorías darwinianas. De esta manera, identificamos un campo semántico que resultaría decisivo para una genealogía del factor competencia, reconociendo a este último como la hipótesis principal que fundamenta la naturalización del capitalismo. A partir de esto ofrecemos una revisión y actualización de la célebre obra El apoyo mutuo de Kropotkin con el objetivo de invalidar desde una perspectiva histórica la comprensión de la sociedad como un territorio de lucha salvaje entre los seres humanos por la subsistencia.
La crisis de la noción de legalidad y la defensa de la ley por Sócrates
Authors: Sancho Rocher Laura
Published: December 2023

Se plantea en este ensayo la discutida posición de Sócrates acerca de las leyes de Atenas: tanto la ley democrática y positiva, como la ley tradicional no-escrita. Se argumenta sobre las fuentes que tenemos, especialmente la Apología y el Critón de Platón, y los Memorabilia de Jenofonte. Se concluye que Sócrates no dejó nunca, a lo largo de su dilatada existencia, de intentar persuadir sobre la justicia, sosteniendo que, bajo ningún concepto, era justo hacer daño, ni incumplir las leyes o las órdenes de la autoridad superior (humana o divina).
Link Resolver Survival Skills: Using a Team-Based Approach to Diagnosing and Fixing Link Resolver Problems
Authors: Garrett Tiffany , Lutz Kelly , Johnson Lauren
Published: December 2023

As personnel at a digital library with no dedicated electronic resources librarian, we have found creative ways to collaborate on electronic resources management. We created a workflow in which student workers and staff throughout the library diagnose and fix problems with the library’s link resolver. We used this workflow to audit our link resolver using a random sample of citations to which the library should have had full-text access. We assessed linking from our discovery search, Google Scholar, and the EBSCO database platform. In this paper we describe our workflow and report results of the link resolver audit.
Numerical Analysis of the Unsteady Mixed Convection of a Nanofluid in a Concentric Tube Heat Exchanger
Authors: di Schio Eugenia Rossi , Mokhefi Abderrahim , Impiombato Andrea Natale , Biserni Cesare
Published: December 2023

In the present work, a numerical investigation of the unsteady mixed convection and entropy generation of a nanofluid in an annular cylindrical space is presented using the Buongiorno’s two-phase flow model. It deals with a concentric tube heat exchanger where the inner cylinder rotates with a constant frequency and is maintained at hot temperature, while the outer cylinder is cold. The aim of the present investigation is to highlight the effects of some parameters on the hydrodynamic, thermal and mass behavior of the considered nanofluid as well as on the system irreversibility, namely: the inertia (1 ⩽ Re ⩽ 20), the buoyancy (0 ⩽ Ri ⩽ 5), the mass diffusion (0.1 ⩽ Le ⩽ 10) and the vertical positions of the inner cylinder (-0.4 ⩽ H ⩽ 0.4). Moreover, at specific parameters, an optimal position in terms of heat transfer has been determined. The flow of the nanofluid is two-dimensional and governed by the equations of continuity, momentum, energy as well as volume fraction conservation. After performing a finite element method mesh test and validation with the literature, the Nusselt number and the entropy generation are discussed. The results show that the heat transfer rate and entropy generation increase with increasing values of Richardson and Reynolds number, especially when positioning the inner cylinder in the lower part. On the other hand, the nanoparticles migration under the thermophoretic diffusion decrease with the increase of the Lewis number, which consequent decrease of the heat transfer rate.
Study on Two-Phase Pressure Drop of Methane during Flow Boiling in Mini Channel
Authors: Song Jie , Li Qing Lian , Sun Jun , Liu Xin Lin , Chen Lan Wei
Published: December 2023

For LOX/LCH4 variable thrust rocket engine, the propellant methane is traditionally selected as the coolant in regenerative cooling channel (RCC). With the decrease of engine thrust, the mass flow rate of coolant methane decreases gradually. At low engine thrust, the coolant methane is usually in a subcritical state. The heat transfer deterioration of subcritical methane occurs in RCC, which may cause thrust chamber wall ablation. The two-phase pressure drop data of methane are crucial parameters for the design and optimization of RCC. But it is rarely to find such measured frictional pressure drop data of methane in open published literature. The two-phase pressure drop of methane during flow boiling in the single mini channels with the diameters of 2.0 mm are investigated systematically. Effects of the mass flux (582.19~1755.48 kg/m2·s), inlet pressure (0.56~3.55 MPa), heat flux (53.25~318.68 kW/m2) on the frictional pressure drop of methane are discussed. The results show that the frictional pressure drop of methane during flow boiling increases with mass flux and inlet pressure at the experimental conditions, and heat flux shows weak effect on the frictional pressure drop. The comparisons of the experimental data with the predicted value by existing six correlations are analyzed. Contrary to the conventional channels, homogeneous model yields better prediction than five separated flow models. Present experimental results can provide reference for the design and optimization of RCC in LOX/LCH4 rocket engine.
Mechanical Properties of Indentation in Plasma Nitrided and Nitrocarburized Austenitic Stainless Steel AISI 321
Authors: Manfrinato Marcos Dorigão , Sgarbi Rossino Luciana , Kliauga Andrea Madeira , Florêncio Odila
Published: December 2023

Austenitic stainless steels are widely used due to their resistance to corrosion and to the possibility of using them at temperatures above 600 °C. Plasma nitriding and nitrocarburizing consist of a thermochemical process that introduces nitrogen and nitrogen/carbon, in atomic form, allowing the formation of second phases of these elements with the substrate. These thermochemical treatments of plasma nitriding and nitrocarburizing were performed on austenitic stainless steel AISI 312 at temperatures of 400 °C and 500 °C, obtaining thicknesses of around 12 μm and 24 μm, respectively. Mechanical properties of indentation were obtained using a Hit 300 nanoindenter (Anton Paar), in a load-unload cycle and with a depth of up to 10% of the layer, with Berkovich indenter. The elastic moduli obtained for the nitrided layers were 281 ± 21 GPa (400 °C) and 163 ± 32 GPa (500 °C) and for the nitrocarburized were 214 ± 12 GPa (400 °C) and 169 ± 25 GPa (500 °C). The indentation nanohardness obtained for the nitrided layers were 14.1 ± 1.0 GPa (400 °C) and 3.5 ± 1.2 GPa (500 °C) and for the nitrocarburized layers were 10.8 ± 0.8 GPa (400 °C) and 4.3 ± 1.2 GPa (500 °C). Therefore, these results indicate slightly higher values for the two mechanical properties indentation (elastic modulus and nanohardness) at 400 °C than at 500 °C caused by nitriding compared to nitrocarburizing treatment; however, when considering the percentages of standard deviations, the treatments at 500 °C present much higher values for these properties, as compared to the treatments at 400 °C, a behavior associated with the presence of chromium and iron nitrides.
Machine Learning-Based Research for Material Property Analysis and Prediction of UHPC/CNT Composites
Authors: Kim Dongwook , Hong Sung Gul
Published: December 2023

This paper aims to research and predict the expression of formability and compressive strength using machine learning (ML) technology for the composite materials manufactured by mixing CNTs with UHPC. To this end, numerical data of two material properties were collected through related experiments and literature data from a mixing ratio of 0 to 1% manufactured by mixing CNTs with UHPC. Afterwards, in order to predict the material properties of UHPC/CNT composite with various mixing ratios that have not been experimented and studied, the material properties were predicted using ML techniques, k-NN regression and decision tree method based on the collected data. As a result, data analysis with collecting similar kind of research and experimental data, it was confirmed that the formability significantly decreased when the CNTs mixing ratio was 0.4% or more. Also, compressive strengths in the detailed mixing ratio period from 0 to 1% could be predicted. This suggests that the properties of newly developed building materials through this study can be identified with high reliability using ML techniques.
Experimental Investigation on Boiling Heat Transfer Characteristics of Liquid Methane in Mini Channel
Authors: Song Jie , Li Qing Lian , Sun Jun , Liu Xin Lin , Chen Lan Wei
Published: December 2023

LOX/LCH4 rocket engine has been recognized as the ideal power choice for future space vehicles due to the merits of low cost, non-toxic and pollution-free, convenient maintenance, suitable for reuse and high specific impulse. In the process of wide range variable thrust of LOX/LCH4 rocket engine, the coolant methane is in a subcritical state due to the low combustor pressure under low operation conditions. The instability of two-phase flow is easy to occur in regenerative cooling channel (RCC), and it is urgent to investigate the heat transfer performance of methane with phase change in RCC. Experiments have been conducted to investigate the flow boiling characteristics of liquid methane in the single mini channels with the diameters of 1.0, 1.5 and 2.0 mm. Effects of the mass flux (266.75~1781.26 kg/m2·s), inlet pressure (0.56~4.24 MPa), heat flux (53.25~800.07 kW/m2) and channel diameter (1.0~2.0 mm) on the flow boiling heat transfer coefficients are tested. Results show that there are two regions with different heat transfer mechanism, one is the nucleate boiling dominated region for low mass quality and the other is the convection evaporation dominated region for high mass quality. A new correlation expressed by Bo, We, Kp, X, Co, Ftg is proposed, which yields good fitting for 355 experimental data with a mean absolute error (MAE) of 10.9%. Present experimental results can provide reference for the thermal protection prediction and optimal design of RCC in LOX/LCH4 rocket engine.