bluuebunny/crossref_metadata_2025 huggingface dataset:
Revving Up Revenue: Unlocking the Power of Cancellation Policies on Booking Intentions
Authors:   , Vo Le Bich Ngoc
Published: December 2023

Over the years, last-minute cancellations and no-shows have presented difficulties for the hospitality sector, negatively affecting hotel operations and revenue. The cancellation policies of hotels have changed significantly as a result. These rules have been modified to act as "price fences" as a result of revenue management strategies used in the hotel industry. This study aims to find out how various cancellation policies impact consumers' perceptions of risk and intent to reserve hotel rooms at various times. The study provides insight into the factors that affect consumer behavior and choices for hospitality goods and services by examining these elements. The results of the study offer some understanding into how hotels and other hospitality businesses can use cancellation policies to customize their marketing strategies to meet consumer needs and preferences while successfully managing revenue and profitability.
Crianças, seus desenhos importam! enunciações infantis como potências para os currículos
Authors: Gomes Larissa Ferreira Rodrigues , Gouveia Claudineia Rossini
Published: December 2023

Amplia sentidos sobre experiências com o desenho infantil em um CMEI de Vitória/ES, junto às professoras e às crianças entre 5 e 6 anos, durante o ano de 2022. Problematiza: as enunciações infantis que emergem com seus desenhos produzem que tipo de potências para os currículos e para as docências na educação infantil? Mobiliza a pesquisa-intervenção com a cartografia (Passos, Kastrup, Escóssia, 2020; Deleuze, Guattari, 1995) para a produção e análise dos processos da pesquisa. Os resultados destacam que o currículo não é neutro devido à experiência como uma condição da infância, alertam as docências para os riscos de a engrenagem capital controlar a força criativa das crianças e anular a diferença, indicam que o desejo é revolucionário, o que amplia a condição de alteridade na educação infantil. As considerações afirmam a ressignificação dos currículos e das práticas docentes pelas enunciações infantis, envolvendo as crianças nos espaços políticos de participação, com a abertura nas relações adulto e criança, ampliando a composição de currículos e docências inventivas.
Tessituras entre alteridade e educação: oito abordagens contemporâneas para a educação sexual na escola e a (des) aparição das dimensões da sexualidade humana na BNCC
Authors: Silveira Éderson Luís
Published: December 2023

Situando-se nos estudos do currículo, este texto busca explicitar as oito abordagens contemporâneas para a educação sexual na escola, a fim de analisar como aspectos relacionados a dimensões da sexualidade humana estão presentes (ou não) na BNCC. Discutir com responsabilidade aspectos concernentes a esse tema envolve o comprometimento e a instauração de desnaturalizações, para que se possa interrogar a história, ao invés de se deixar levar por discursos e práticas regulados pela hegemonia heterossexual vigente. Diante disso, as regulações de comportamento social passíveis de aprovação (geralmente orquestradas pela heteronormatividade) podem sofrer transformações com o passar do tempo, o que evidencia a existência das relações de poder no que diz respeito aos corpos enquanto objeto de julgamento do Outro. Ademais, o discurso conservador ganha adeptos com frequência no mundo todo e, no Brasil, não é diferente. Essa abordagem pode ser associada, portanto, à elaboração e à reprodução da narrativa de que questões associadas a gênero e sexualidade são inimigas a serem combatidas pelas famílias, para que não sejam implementadas nas escolas nacionais. Conclui-se que os desafios que as escolas enfrentam cotidianamente, no que diz respeito ao tema, quando negligenciados, podem levar à ampliação das desigualdades sociais, sobretudo no que diz respeito a vivências e desafios dos sujeitos “ininteligíveis”, cuja generificação não resulta de uma coerência entre sexo, gênero e desejo regulada por pressupostos heteronormativos.
A “inovadora” política angrense e o processo de reestruturação pós BNCC: um estudo da construção discursiva curricular centralizadora no município
Authors: Ribeiro William de Goes , Mendonça Daniel de
Published: December 2023

O objetivo deste estudo é analisar o processo de reestruturação curricular municipal pós-BNCC. Como se sabe, distintos entes federados reconfiguraram suas propostas educacionais, atendendo à portaria federal, a qual torna obrigatório que estados e municípios alinhem seus currículos escolares à Base. Tal processo é atravessado por três elementos: os efeitos na educação provocados pela pandemia de Covid-19; o retorno de Luiz Inácio Lula da Silva à presidência e demandas “locais”. Para esta investigação, se fez uso de pressupostos pós-estruturalistas e pós-fundacionais, compondo o referencial com o enfoque nesse terceiro elemento que diz respeito à política municipal. Conforme os argumentos, se rejeita noções teleológicas e fundacionais amparadas em perspectiva identitário-essencialista para pensar e lidar com o social. Diferentemente, adota-se a noção de discurso tal qual sinaliza a teoria política laclauniana. Nesse sentido, observamos a dinâmica do político e desdobramentos do discurso educacional, estudando o caso da articulação do currículo angrense sob a proposição de “inovação educacional” à dinâmica centralizadora nacional. O trabalho reforça que o que se entende por currículo e por inovação não estão dados, mas reelaborados de maneira constante, contingente e precária, a partir da construção de sentidos.
Enhancing Airfoil Performance through Artificial Neural Networks and Genetic Algorithm Optimization
Authors: NEGOITA Mara-Florina , CRUNTEANU Daniel-Eugeniu , HOTHAZIE Mihai-Vladut , PRICOP Mihai-Victor
Published: December 2023

As airfoil design plays a crucial role in achieving superior aerodynamic performances, optimization has become an essential part in various engineering applications, including aeronautics and wind energy production. Airfoil optimization using high-fidelity CFD, although highly effective, has proven itself to be time-consuming and computationally expensive. This paper proposes an alternative approach to airfoil performance assessment, through the integration of a deep learning algorithm and a stochastic optimization method. NACA 4-digit parametrization was used for airfoil geometry generation, to ensure feasibility and to reduce the number of input variables. An extensive dataset of airfoil performance parameters has been obtained using an automated CFD solver, laying the foundation for the training of an accurate and robust Artificial Neural Network, capable of accurately predicting aerodynamic coefficients and significantly reducing computational time. Due to the ANN’s predictive capabilities of efficiently navigating vast search spaces, it has been employed as the fitness evaluation method of a multi-objective Genetic Algorithm. Following the optimization process, the resulting airfoils demonstrate significant enhancements in aerodynamic performance and notable improvements in stall behavior. To validate their increased capabilities, a high-fidelity Computational Fluid Dynamics (CFD) validation was conducted. Simulation results demonstrate the approach’s efficacy in finding the optimum airfoil shape for the given conditions and respecting the imposed constraints.
Observation of maximal intrinsic chirality empowered by dual quasi-bound states in the continuum in a planar metasurface
Authors: Qi Xin , Wu Jiaju , Wu Feng , Zhao Song , Wu Chao , Min Yueyang , Ren Mina , Wang Yufei , Jiang Haitao , Li Yunhui , Guo Zhiwei , Yang Yaping , Zheng Wanhua , Chen Hong , Sun Yong
Published: December 2023

Metasurfaces with spin-selective transmission play an increasingly critical role in realizing optical chiral responses, especially for strong intrinsic chirality, which is limited to complex three-dimensional geometry. In this paper, we propose a planar metasurface capable of generating maximal intrinsic chirality and achieving dual-band spin-selective transmission utilizing dual quasi-bound states in the continuum (quasi-BICs) caused by the structural symmetry breaking. Interestingly, the value of circular dichroism (CD) and the transmittance of two kinds of circular polarization states can be arbitrarily controlled by tuning the asymmetry parameter. Remarkable CD approaching unity with the maximum transmittance up to 0.95 is experimentally achieved in the dual band. Furthermore, assisted by chiral BICs, the application in polarization multiplexed near-field image display is also exhibited. Our work provides a new avenue to flexibly control intrinsic chirality in planar structure and offers an alternative strategy to develop chiral sensing, multiband spin-selective transmission, and high-performance circularly polarized wave detection. The basic principle and design method of our experiments in the microwave regime can be extended to other bands, such as the terahertz and infrared wavelengths.
Transcription induces context-dependent remodeling of chromatin architecture during differentiation
Authors: Chahar Sanjay , Ben Zouari Yousra , Salari Hossein , Kobi Dominique , Maroquenne Manon , Erb Cathie , Molitor Anne M. , Mossler Audrey , Karasu Nezih , Jost Daniel , Sexton Tom
Published: December 2023

Metazoan chromosomes are organized into discrete spatial domains (TADs), believed to contribute to the regulation of transcriptional programs. Despite extensive correlation between domain organization and gene activity, a direct mechanistic link is unclear, with perturbation studies often showing little effect. To follow chromatin architecture changes during development, we used Capture Hi-C to interrogate the domains around key differentially expressed genes during mouse thymocyte maturation, uncovering specific remodeling events. Notably, one TAD boundary was broadened to accommodate RNA polymerase elongation past the border, and subdomains were formed around some activated genes without changes in CTCF binding. The ectopic induction of some genes was sufficient to recapitulate domain formation in embryonic stem cells, providing strong evidence that transcription can directly remodel chromatin structure. These results suggest that transcriptional processes drive complex chromosome folding patterns that can be important in certain genomic contexts.
Programming co-assembled peptide nanofiber morphology via anionic amino acid type: Insights from molecular dynamics simulations
Authors: Dong Xin Y. , Liu Renjie , Seroski Dillon T. , Hudalla Gregory A. , Hall Carol K.
Published: December 2023

Co-assembling peptides can be crafted into supramolecular biomaterials for use in biotechnological applications, such as cell culture scaffolds, drug delivery, biosensors, and tissue engineering. Peptide co-assembly refers to the spontaneous organization of two different peptides into a supramolecular architecture. Here we use molecular dynamics simulations to quantify the effect of anionic amino acid type on co-assembly dynamics and nanofiber structure in binary CATCH(+/-) peptide systems. CATCH peptide sequences follow a general pattern: CQCFCFCFCQC, where all C’s are either a positively charged or a negatively charged amino acid. Specifically, we investigate the effect of substituting aspartic acid residues for the glutamic acid residues in the established CATCH(6E-) molecule, while keeping CATCH(6K+) unchanged. Our results show that structures consisting of CATCH(6K+) and CATCH(6D-) form flatter β-sheets, have stronger interactions between charged residues on opposing β-sheet faces, and have slower co-assembly kinetics than structures consisting of CATCH(6K+) and CATCH(6E-). Knowledge of the effect of sidechain type on assembly dynamics and fibrillar structure can help guide the development of advanced biomaterials and grant insight into sequence-to-structure relationships.
SPSL1 is essential for spermatophore formation and sperm activation in Spodoptera frugiperda
Authors: Qian Lansa , Yang Xu , Xu Xiaomiao , Yang Dehong , Zhu Chenxu , Yi Meiyan , Bi Honglun , Wang Yaohui , Huang Yongping
Published: December 2023

The reproductive process in various species has undergone evolutionary adaptations at both the physiological and molecular levels, playing a significant role in maintaining their populations. In lepidopteran insects, the spermatophore is a unique structure formed in the female reproductive system, in which sperm storage and activation take place. It is known that the formation of the spermatophore is regulated by seminal fluid proteins derived from males. However, studies investigating the genetic mechanisms behind spermatophore formation in lepidopterans have been limited. In this study, our focus was on SPSL1, a gene that encodes a trypsin-type seminal fluid protein in Spodoptera frugiperda, a pest species with global invasive tendencies. Our findings revealed that SPSL1 expression was predominantly observed in the male reproductive tracts, and the disruption of this gene resulted in male sterility. Surprisingly, fluorescence analysis indicated that the absence of SPSL1 did not affect spermatogenesis or sperm migration within the male reproductive system. However, when females mated with SPSL1-mutant males, several defects were observed. These included disruptions in spermatophore formation, sperm activation in the copulatory bursae, and sperm migration into the spermathecae. Additionally, mass spectrometry analysis highlighted reduced levels of energy-related metabolites, suggesting that SPSL1 plays an essential role in promoting hydrolysis reactions during copulation. Consequently, our study demonstrates that SPSL1 is crucial for male fertility due to its functions in spermatophore formation and sperm activation. This research provides valuable insights into the genetic factors underlying reproductive processes in lepidopteran insects and sheds light on potential strategies for controlling invasive pest populations.
Translation and cross-cultural adaptation of the “Protocolo de Avaliação Miofuncional Orofacial MBGR” from Brazilian Portuguese into English
Authors: Silva Nayara Ribeiro da , Berretin-Felix Giédre , Santos Carlos Ferreira , Bourgeois Michelle Suzanne
Published: December 2023

In health-related research, an increasing number of clinical assessment tools are translated and cross-culturally adapted for cross-national and cross-cultural studies and comparisons. However, when translating and cross-culturally adapting clinical assessment tools for use across new countries, cultures, or languages, we must follow a thorough method to reach semantic, idiomatic, experiential, and conceptual equivalences between translated and original versions. Therefore, in this study, we translated and cross-culturally adapted the Protocolo MBGR (Marchesan, Berretin-Felix, Genaro, and Rehder) from Brazilian Portuguese into English, following international guidelines, and named it “MBGR Protocol.” To verify its content validity, we used the Content Validity Index. Results indicated excellent content validity: a Scale-Content Validity Index of 0.96 and 97% of all translation units with an Item-Content Validity Index of 1.00. Also, to prove its face validity and confirm whether it worked in the target population’s linguistic-cultural setting, we used it with 35 subjects. Again, results demonstrated excellent face validity: in the pretest, 91% of all translation units were considered comprehensible and clear; in the pilot test, 98% of all translation units were considered comprehensible and clear. Thus, we concluded that the MBGR Protocol is promising to enhance the uptake of studies in Orofacial Myology worldwide and support researchers and health professionals in assessing and diagnosing orofacial myofunctional disorders in children, adolescents, adults, and the elderly. Also, it may support evidence-based practice and assist in standardizing assessment and diagnostic criteria. The MBGR Protocol should have its psychometric properties tested before being used in clinical practice or scientific research. Therefore, future studies are needed, and collaborations among researchers from South and North American countries are encouraged to create an international network and advance with knowledge and skills in the Orofacial Myology discipline.
NSUN2-mediated m5C modification of HBV RNA positively regulates HBV replication
Authors: Feng Jiangpeng , Xu Tianmo , He Miao , Li Jiali , Yao Peipei , Ma Chengbao , Yang Shimin , Xu Zaichao , Yan Kun , Chen Xianying , Wang Hongyun , Liu Jiejie , Zeng Cong , Xia Yuchen , Yan Huan , Zhou Li , Chen Yu
Published: December 2023

Chronic hepatitis B virus (HBV) infection is a major cause of liver cirrhosis and liver cancer, despite strong prevention and treatment efforts. The study of the epigenetic modification of HBV has become a research hotspot, including the N6-methyladenosine (m6A) modification of HBV RNA, which plays complex roles in the HBV life cycle. In addition to m6A modification, 5-methylcytosine (m5C) is another major modification of eukaryotic mRNA. In this study, we explored the roles of m5C methyltransferase and demethyltransferase in the HBV life cycle. The results showed that m5C methyltransferase NSUN2 deficiency could negatively regulate the expression of HBV while m5C demethyltransferase TET2 deficiency positively regulates the expression of HBV. Subsequently, we combined both in vitro bisulfite sequencing and high-throughput bisulfite sequencing methods to determine the distribution and stoichiometry of m5C modification in HBV RNA. Two sites: C2017 and C131 with the highest-ranking methylation rates were identified, and mutations at these two sites could lead to the decreased expression and replication of HBV, while the mutation of the “fake” m5C site had no effect. Mechanistically, NSUN2-mediated m5C modification promotes the stability of HBV RNA. In addition, compared with wild-type HepG2-NTCP cells and primary human hepatocytes, the replication level of HBV after NSUN2 knockdown decreased, and the ability of the mutant virus to infect and replicate in wild-type HepG2-NTCP cells and PHHs was substantially impaired. Similar results were found in the experiments using C57BL/6JGpt-Nsun2+/- mice. Interestingly, we also found that HBV expression and core protein promoted the endogenous expression of NSUN2, which implied a positive feedback loop. In summary, our study provides an accurate and high-resolution m5C profile of HBV RNA and reveals that NSUN2-mediated m5C modification of HBV RNA positively regulates HBV replication by maintaining RNA stability.
Experimental infection of pigs and ferrets with “pre-pandemic,” human-adapted, and swine-adapted variants of the H1N1pdm09 influenza A virus reveals significant differences in viral dynamics and pathological manifestations
Authors: Kristensen Charlotte , Laybourn Helena A. , Crumpton Jeri-Carol , Martiny Karen , Webb Ashley , Ryt-Hansen Pia , Trebbien Ramona , Jensen Henrik E. , Nissen Jakob N. , Skovgaard Kerstin , Webby Richard J. , Larsen Lars E.
Published: December 2023

Influenza A viruses are RNA viruses that cause epidemics in humans and are enzootic in the pig population globally. In 2009, pig-to-human transmission of a reassortant H1N1 virus (H1N1pdm09) caused the first influenza pandemic of the 21st century. This study investigated the infection dynamics, pathogenesis, and lesions in pigs and ferrets inoculated with natural isolates of swine-adapted, human-adapted, and “pre-pandemic” H1N1pdm09 viruses. Additionally, the direct-contact and aerosol transmission properties of the three H1N1pdm09 isolates were assessed in ferrets. In pigs, inoculated ferrets, and ferrets infected by direct contact with inoculated ferrets, the pre-pandemic H1N1pdm09 virus induced an intermediary viral load, caused the most severe lesions, and had the highest clinical impact. The swine-adapted H1N1pdm09 virus induced the highest viral load, caused intermediary lesions, and had the least clinical impact in pigs. The human-adapted H1N1pdm09 virus induced the highest viral load, caused the mildest lesions, and had the least clinical impact in ferrets infected by direct contact. The discrepancy between viral load and clinical impact presumably reflects the importance of viral host adaptation. Interestingly, the swine-adapted H1N1pdm09 virus was transmitted by aerosols to two-thirds of the ferrets. Further work is needed to assess the risk of human-to-human aerosol transmission of swine-adapted H1N1pdm09 viruses.
Incidencia de las prácticas artísticas en la transformación social del territorio
Authors: Sánchez Quinchuela Patricio
Published: December 2023

Este artículo reivindica las prácticas artísticas como un medio para el desarrollo de la comunidad y la transformación social de un territorio, más allá del buen uso del tiempo libre o la recreación. Son esos espacios barriales o comunitarios ubicados en zonas periféricas o marginales de una ciudad donde se adaptan las prácticas artísticas al entorno a diferencia de espacios convencionales de producción y circulación de bienes, productos y servicios artísticos y culturales como son galerías, teatros o centros de arte. En este marco se aborda la experiencia de la Asociación Comunitaria Hilarte en el sector de Isla Trinitaria de la ciudad de Guayaquil, que ha impulsado el desarrollo de las prácticas artísticas como un eje de una pedagogía sensible y espacio de encuentro que promueve la interacción social de la comunidad en una zona poblada casi en su totalidad por familias afrodescendientes con condiciones de pobreza económica, marginalidad social y limitados accesos a educación, salud, vivienda, servicios culturales entre otros. Entrevistas, testimonios de actores involucrados y análisis de proyectos y acciones realizadas en este contexto, nos permiten conocer los factores e impactos significativos de transformación social evidenciables en este territorio.
Paradojas de las prácticas productivas artísticas alternativas en el paradigma del arte contemporáneo
Authors: Mayo Vega Luis Manuel
Published: December 2023

Las nuevas prácticas artísticas alternativas que cuestionan el mercado artístico y las políticas culturales actuales se enfrentan a contradicciones porque el paradigma moderno conserva agentes con capital simbólico cuando el paradigma contemporáneo del arte posmoderno se desgasta; verbigracia, las galerías garaje son moda y no alternativa económica. Cada componente del sistema productivo del arte (entendido como un proceso comunicativo) contiene paradojas: 1. Artistas rebeldes integrados en la paradoja permisiva de las instituciones culturales; 2. Contenidos fringe artistificados  enmarcados en una estética exótica global neocolonial; 3. Mercado secundario artístico –subastas- con mayor capital simbólico y económico que el mercado primario –galerías de arte-, lo que provoca estrategias de mercado elitistas y ofelimitadas entre sus artistas estrellas; 4. Públicos deambulantes se empoderan haciendo cola ante el museo contemporáneo y cuestionan la definición de arte como bien de mérito. El flamante Studio RFG de Madrid es nuestro caso de estudio.
Tiempos para el cuidado
Authors: Sgaramella Chiara , López de Frutos Estela
Published: December 2023

Este artículo presenta algunas reflexiones sobre las prácticas artístico-culturales actuales a partir del análisis del proyecto transdisciplinar Agroversitat. En un contexto socioeconómico caracterizado por dinámicas de hiperproducción y consumo, esta investigación explora el potencial del arte para experimentar con modos de hacer más ecológicos y socialmente comprometidos a partir de un enfoque ecofeminista. Agroversitat es una propuesta que se centra en la defensa de l'Horta valenciana no solo como espacio agrícola de gran valor ambiental, sino también como lugar de producción cultural y creatividad. Adoptando un enfoque procesual, el proyecto promueve el diálogo colectivo, la co-creación y la difusión abierta de conocimientos. A partir de una estrecha colaboración con varios agentes locales, la iniciativa busca así enraizar la práctica artística en el territorio y generar redes de cooperación a largo plazo.
Study of Bi-functional Applications of ZnO Nanoparticles Synthesized via Sonochemical Route
Authors: Raghupathy D.A. , Ramgopal G. , Kumar V.G. Dileep , Kumar T. Naveen , Ravikumar C.R.
Published: December 2023

The sonochemical synthesis involved the dispersion of zinc oxide (ZnO) precursor in a suitable solvent, followed by ultrasonic irradiation to induce chemical reactions and nucleation of ZnO nanoparticles. The resulting nanomaterials exhibited a uniform particle size distribution, which is crucial for their photocatalytic efficiency. ZnO nanoparticles with a uniform particle size of 25 nm were successfully synthesized using a sonochemical route and were employed for the degradation of direct green and fast orange dyes under UV light irradiation. The band gap of the ZnO nanoparticles was determined to be 3.35 eV, indicating its potential as a photocatalyst for dye degradation. The degradation efficiency of the dyes was evaluated by monitoring the change in their  concentration over time. The ZnO nanoparticles demonstrated excellent photocatalytic activity, efficiently degrading both dyes within a relatively short duration. The electrochemical studies further confirmed the potential applicability of the synthesized ZnO nanoparticles in various electrochemical systems. The ZnO electrode that was produced could detect lead in an acidic solution. The ZnO electrode is a promising electrode material for making sensor applications because of its higher electrochemical behaviour. Overall, this research contributes to the development of efficient and environmentally friendly approaches for wastewater treatment and lead sensor.
Synthesis of Pyrrole-N-vinylcarbazole Neat Copolymer (Py-NVK) and ZnO Nanocomposite (Py-NVK_ZnO)
Authors: Kirtesh Kirtesh Pratap Khare , Kathal Rachana , Shukla Neelima , Srivastava Reena , Srivastava Anurag
Published: December 2023

The present work focused on the synthesis of neat copolymer (Py-NVK) and ZnO Nanocomposite from their pyrrole (Py) and N-vinylcarbazole (NVK) host monomers and creating new conducting materials (Py-NVK & Py-NVK_ZnO). The choice of neat copolymer and ZnO Nanocomposite was motivated by the unique properties of their host monomers (Py & NVK). The neat and ZnO Nanocomposite copolymer was prepared by the sol-gel method using FeCl3 as an initiator. Structural analyses were performed using Field emission scanning electron microscopy (FESEM), High-resolution transmission electron microscopy (HRTEM), X-Ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR).
Promising Biomass Derived Functional Carbon from Brassica oleracea (Leaf) for Super Capacitor Applications
Authors: Kaviyashri R. , Manimegalai S. , Dhivya C. , Prithiba A. , Mathina A.
Published: December 2023

The progress in development of novel electrode materials is critical for invention of energy storage devices as increased energy consumption necessitates extremely effective energy conversion. The biomass material (waste) obtained from Brassica oleracea (Leaf) was successfully transformed into functional carbon for use as electrode materials in electrochemical applications. The samples BOL-800 and BOL-900 were characterized using FT-IR spectroscopy and elemental analysis, which indicated the presence of functional carbon. The XRD analysis confirmed the amorphous nature of the synthesized samples, whereas SEM images clearly confirmed the formation of micro-size pores. Thermogravimetric analysis of BOL-800 indicated the progression of gasification reaction. Specific capacitance values for samples BOL-800 and 900 were calculated using cyclic voltammetry and galvanostatic charge discharge at current density of 0.5 A/g. Among the tested electrodes, BOL-900 electrode was found to exhibit superior specific conductance.
Problems of Mine Construction and Mechanization of Coal Mining in the Kemerovo Mine during the First Five-Year Plan
Authors: Morozov N.M.
Published: December 2023

The problems ofmine construction and mechanization of technological processes at the Kemerovo mine are considered - one of the main ways to increase the volume of coal production provided for by the plans of the the first five-year plan. During 1928-1932 it was planned to build six large mines there. There is an unsatisfactory provision of their construction in the required amount of financial and material resources, without preliminary accounting for the state of the soils, careful geological exploration of reserves. The facilities construction was carried out in a artisanal way without machines and mechanisms, without observing safety precautions. Based on the situation, production problems, including poor organization of labor, were not solved quickly enough in the current regime.

With an improvement in the level of mechanization of underground work and the commissioning of the mine "Pioneer" in the last year of the five-year period at the mine significantly (by 135%) the volume of coal production increased. The factor holding it back was still the problem of the lack of mechanization in many labor-intensive jobs, both on the surface and in underground mines, as well as the general unsatisfactory level of qualification of miners.
Spatial-Temporal Regularities of Hydrooptical Characteristics of the Ob River
Authors: Akulova O.B. , Bukaty V.I. , Kirillov V.V.
Published: December 2023

Field studies conducted in spring (March 26 — April 9, 2022) and summer (June 5-16, 2022) in the Ob River mouth region at the three hydromorphological stations „Kazym-Mys“, „Azovy“, and „Salemal“ (YaNAO) to obtain new data on the hydrooptical characteristics of water in the Lower Ob river. Also, the trophic status and ecological state of the Lower Ob river region were assessed. The greatly varying light attenuation coefficient ε(λ) was calculated at the four characteristic wavelengths of 430, 450, 550, and 670 nm, respectively. It ranges from 9.3 m-1 to 22.1 m-1 during the winter low water (freeze-up) period and from 7.3 m-1 to 33.0 m-1 during the open water (high water) period. The calculated relative spectral contributions of major optically active components of water (pure water, suspension, yellow substance, chlorophyll) to ε(λ) suggest that suspension and yellow substance make up the maximal contribution at different horizons. Additionally, the calculated coefficient of light absorption by yellow substance кys(λ) varies within the ranges from 5.5 m-1 to 9.9 m-1 (spring) and from 3.1 m-1 to 17.0 m-1 (summer), respectively. The relative transparency was measured using the Secchi disc. The concentrations of yellow substance and major photosynthetic pigments — chlorophylls a, b, c, and carotenoids — were estimated alongside. The obtained results could be useful for environmental monitoring and predicting the dynamics of aquatic ecosystems in the region under climate change and increased anthropogenic pressure caused by the use of natural resources.
Rayleigh — Benard problem for Polymer Solution
Authors: Pukhnachev V.V. , Frolovskaya O.A.
Published: December 2023

There are three mathematical models describing the motion of aqueous solutions of polymers: the second grade fluid model (Rivlin — Eriksen), the hereditary model (Voitkunsky — Amfilokhiev — Pavlovsky), and its asymptotic simplification (Pavlovsky). This work considers the problem of fluid equilibrium stability in a horizontal fluid layer heated from below or from above. Also, equations of thermal gravitational convection for all three models are derived. Three types of boundary conditions are considered: two solid boundaries; the lower solid boundary and the upper free boundary; two free boundaries (the Rayleigh problem). For the case of heating from below, the principle of perturbation monotonicity is established that ensures the spectral problem eigenvalues to be of real type. This greatly simplifies the determination of the critical Rayleigh numbers. It turned out that these numbers coincide with the critical Rayleigh numbers in the classical Rayleigh — Benard problem. In the case of heating from above at large temperature gradients, the perturbation decrements become complex, but their real parts are negative. The conclusion that the relaxation properties of a second grade fluid and an aqueous solution of polymers do not lead to a change in the critical Rayleigh number may seem strange at first glance. According to our assumption, it is explained by the base state of the liquid being a state of rest.
First record of Bacillicladium lobatum (Chaetothyriales) in Caucasus (second finding in the world)
Authors: Kirtsideli Irina Yu. , Iliushin Vadim A. , Vlasov Dmitry Yu. , Barantsevich Elena P.
Published: December 2023

Bacillicladium lobatum was isolated from cryoconits at the mountains of the Caucasus, and it is represented by strain CZ-25. Macro- and micromorphology of the isolate were examined along with partial sequences of internal transcribed spacer of rDNA (ITS1-5.8S-ITS2). The isolate Bacillicladium lobatum CZ-25 had a number of features that distinguished it from the strain Bacillicladium lobatum from speleothem biofilm covering bare granite walls in the KungstraÈdgården metro station in Stockholm. Strain from Caucasus had conidia larger and hyphae wide, and the maximum growth temperature was higher. As a result of our study, we first discovered the microfungi Bacillicladium lobatum at the Caucasus. Our study shows that Bacillicladium lobatum is a species found at towns of Northern Europe and at the mountains of Caucasus.
INDIKATOR MASYARAKAT CERDAS COVID-19 DALAM MEWUJUDKAN KAMPUNG TANGGUH NUSANTARA: KASUS STUDI BANDAR LAMPUNG
Authors: Sinatra Fran , Hidayatullah Ricky , Affandi Muhammad Irfan
Published: December 2023

Kampung Tangguh Nusantara (KTN) merupakan program pemerintah dalam penanganan pandemi Covid-19 di era new normal. Keberhasilan mewujudkan KTN memerlukan peranan berbagai pihak salah satunya peran masyarakat yang cerdas. Penelitian ini bertujuan untuk menyusun indikator dan mengkaji potensi masyarakat cerdas dalam mendukung KTN. Metode analisis deskriptif kualitatif digunakan dalam menyusun indikator dan deskriptif kuantitatif digunakan untuk menghitung potensi masyarakat cerdas Covid-19 (MCC-19). Terdapat empat dimensi dan enam belas indikator MCC-19, meliputi: Pertama, dimensi Kesehatan dan Keamanan dengan indikator jumlah kasus terkonfirmasi Covid-19, keamanan lingkungan, akses fasilitas kesehatan, kesadaran dan kebersihan lingkungan. Kedua, dimensi sosial dan ekonomi dengan indikator tingkat toleransi penduduk, respon terhadap suspek Covid-19, kemandirian ekonomi, dan akses logistik. Ketiga dimensi partisipasi dan transparansi yang terdiri dari indikator tingkat partisipasi dalam program KTN, keterbukaan informasi, ketersediaan layanan pengaduan berbasis digital, dan partisipasi masyarakat dalam pencegahan. Keempat dimensi, pemberdayaan dan kapasitas dengan indikator akses terhadap sarana pendidikan, akses telekomunikasi, pelatihan dan pengembangan masyarakat, serta kemampuan adaptasi dan inovasi dalam menghadapi pandemi. Secara keseluruhan, masyarakat Kelurahan Pinang Jaya memiliki potensi masyarakat cerdas dalam mendukung Kampung Tangguh Nusantara di Kelurahan Pinang Jaya. Kelurahan Pinang Jaya unggul pada dimensi sosial ekonomi dan dimensi partisipasi dan transparansi.
KONDISI DAYA DUKUNG AIR TERHADAP KETERSEDIAAN SUMBERDAYA AIR DI KECAMATAN SAWANGAN KOTA DEPOK
Authors: Sukwika Tatan , Firmansyah Irman
Published: December 2023

Fenomena urban sprawl di Kota Depok diperkirakan telah menyebabkan degradasi lingkungan yang membahayakan daya dukung sumber daya air. Selain itu, Kecamatan Sawangan sebagai Sub Pusat Pelayanan Kota sejak tahun 2015 menjadi tujuan baru perumahan dan kegiatan lainnya. Penelitian ini bertujuan untuk menganalisis daya dukung sumber daya air di Kecamatan Sawangan Kota Depok. Analisis dilakukan dengan mengestimasi ketersediaan dan kebutuhan air, yang menggunakan analisis sistem spasial dan dinamis. Selanjutnya, menggunakan koefisien limpasan berdasarkan informasi penggunaan lahan dan data curah hujan tahunan untuk memperkirakan ketersediaan air. Mengkonversi kebutuhan harian standar untuk memperkirakan kebutuhan air. Hasil penelitian menunjukkan bahwa kebutuhan dan ketersediaan air di Sawangan masing-masing diperkirakan 16.266 dan 20.728 juta liter/tahun. Dengan demikian, total ada surplus sekitar 4.462 juta liter/tahun, meskipun terjadi defisit air di 5 dari 6 desa. Sedangkan proyeksi jangka panjang menunjukkan kebutuhan air akan mencapai 25.161 juta liter/tahun pada tahun 2030. Kesimpulannya Sawangan secara total surplus air, tetapi masih defisit di 5 desa. Ada juga tantangan besar untuk memastikan pemenuhan kebutuhan air dalam jangka panjang. Oleh karena itu, diperlukan kebijakan untuk memastikan: pemulihan lingkungan di daerah tangkapan air yang rusak, terutama di sekitar desa-desa defisit; dan pemeliharaan daya dukung sumber daya air untuk menjamin pemenuhan kebutuhan air di masa mendatang. Sementara itu, perlu dilakukan kemungkinan untuk mendistribusikan air dari daerah surplus ke daerah defisit melalui promosi inovasi teknologi.
FAKTOR EKSTERNAL DAN INTERNAL PERILAKU KESELAMATAN BERKENDARA PEKERJA KANTORAN PENGGUNA SEPEDA MOTOR (Wilayah Studi: Kota Tangerang Selatan)
Authors: Manullang Okto Risdianto , Waspodo Arya Satrio Wicaksono Putra
Published: December 2023

Kecelakaan lalu lintas yang terjadi di kawasan perkotaan terus meningkat, seiring dengan terus meningkatnya jumlah kendaraan di jalanan. Kecelakaan lalu lintas yang terjadi di Indonesia, sebagian besar disebabkan oleh faktor manusia. Salah satu upaya untuk mengatasi kecelakaan lalu lintas berdasarkan faktor manusia, dapat dilakukan dengan menganalisis perilaku pengguna jalan. Penelitian ini menggunakan metode structural equation modelling (SEM) untuk mengidentifikasi seberapa besar pengaruh faktor eksternal dan internal terhadap perilaku keselamatan berkendara pada pekerja kantoran pengguna sepeda motor di Kota Tangerang Selatan. Faktor Eksternal dilihat dari Theory of Planned Behavior, jarak tempuh, dan waktu tempuh perjalanan. Faktor internal dilihat dari trait kepribadian ekstraversi, kooperatif, neurotisme, dan kesadaran. Analisis dilakukan terhadap masing-masing golongan darah, sehingga dapat melihat faktor yang dominan. Berdasarkan hasil analisis perilaku keselamatan berkendara golongan darah A, B, dan AB lebih dipengaruhi oleh variabel dari faktor eksternal, sedangkan golongan darah O lebih dipengaruhi oleh variabel dari faktor internal.
Pengaruh Kegiatan Pemasaran di Media Sosial, Ulasan Elektronik dari Mulut ke Mulut, dan Penyokong Selebriti terhadap Niat Membeli dengan Kesadaran Merek sebagai Variabel Intervening (Studi Kasus pada Scarlett Whitening di Kalangan Generasi Z Kota Semarang
Authors: Amartya Dewi , Santosa Suryono Budi
Published: December 2023

This study aims to analyze the effect of social media marketing activities, electronic word of mouth, celebrity endorsement, and brand awareness on purchasing intention making (a study on Scarlett Whitening in Generation Z Semarang City), as well as to find out the variables that most influence purchasing intention  so that it can be an overview in making strategies to increase purchasing intention for Scarlett Whitening. This research was conducted for residents residing in Semarang. The number of samples in this study were 114 respondents with the criteria being active Instagram users that knowing and had visited @scarlett_whitening before who are 17 – 27 years old and domiciled in Semarang City. The data collection method used in this study is through a questionnaire. This study uses Structural Equation Modeling (SEM) as an analytical tool. The results of this study indicate that social media marketing activities has a positive and significant effect on brand awareness, electronic word of mouth has a positive and significant effect on brand awareness, celebrity endorsement has a positive and significant effect on brand awarenes, brand awareness has a positive and significant effect on purchase intention. In other hand, social media marketing activities, electronic word of mouth, and celebrity endorsement have no effect on purchase intention.
Przestrzeń w grze wideo Dark Souls jako narzędzie do kreowania światoopowieści
Authors: Mróz Michał
Published: December 2023

The aim of the article is to analyze how space in the video game “Dark Souls” affects various aspects of the interactive text, especially its plot and gameplay. The author focuses on the role of space in the narrative structure of the game, using storyworld concept, analyzing architecture, and the importance of items and their descriptions in constructing the narrative, which is crucial for the reconstruction of story points and also a proper understanding of the game’s religious motives. He goes on to focus on the storyworld events generated by gameplay, describing how it is influenced by space arrangement.
ContTune: Continuous Tuning by Conservative Bayesian Optimization for Distributed Stream Data Processing Systems
Authors: Lian Jinqing , Zhang Xinyi , Shao Yingxia , Pu Zenglin , Xiang Qingfeng , Li Yawen , Cui Bin
Published: December 2023

The past decade has seen rapid growth of distributed stream data processing systems. Under these systems, a stream application is realized as a Directed Acyclic Graph (DAG) of operators, where the level of parallelism of each operator has a substantial impact on its overall performance. However, finding optimal levels of parallelism remains challenging. Most existing methods are heavily coupled with the topological graph of operators, unable to efficiently tune under-provisioned jobs. They either insufficiently use previous tuning experience by treating successively tuning independently, or explore the configuration space aggressively, violating the Service Level Agreements (SLA).

To address the above problems, we propose ContTune, a continuous tuning system for stream applications. It is equipped with a novel Big-small algorithm, in which the Big phase decouples the tuning from the topological graph by decomposing the job tuning problem into sub-problems that can be solved concurrently. We propose a conservative Bayesian Optimization (CBO) technique in the Small phase to speed up the tuning process by utilizing the previous observations. It leverages the state-of-the-art (SOTA) tuning method as conservative exploration to avoid SLA violations. Experimental results show that ContTune reduces up to 60.75% number of reconfigurations under synthetic workloads and up to 57.5% number of reconfigurations under real workloads, compared to the SOTA method DS2.
GraphOS: Towards Oblivious Graph Processing
Authors: Chamani Javad Ghareh , Demertzis Ioannis , Papadopoulos Dimitrios , Papamanthou Charalampos , Jalili Rasool
Published: December 2023

We propose GraphOS, a system that allows a client that owns a graph database to outsource it to an untrusted server for storage and querying. It relies on
doubly-oblivious
primitives and
trusted hardware
to achieve a very strong privacy and efficiency notion which we call
oblivious graph processing
: the server learns nothing besides the number of graph vertexes and edges, and for each query its type and response size. At a technical level, GraphOS stores the graph on a
doubly-oblivious data structure
, so that all vertex/edge accesses are indistinguishable. For this purpose, we propose Omix++, a novel doubly-oblivious map that outperforms the previous state of the art by up to 34×, and may be of independent interest. Moreover, to avoid any leakage from CPU instruction-fetching during query evaluation, we propose algorithms for four fundamental graph queries (BFS/DFS traversal, minimum spanning tree, and single-source shortest paths) that have a
fixed execution trace
, i.e., the sequence of executed operations is independent of the input. By combining these techniques, we eliminate all information that a hardware adversary observing the memory access pattern within the protected enclave can infer. We benchmarked GraphOS against the best existing solution, based on oblivious relational DBMS (translating graph queries to relational operators). GraphOS is not only significantly more performant (by up to two orders of magnitude for our tested graphs) but it eliminates leakage related to the graph topology that is practically inherent when a relational DBMS is used unless all operations are "padded" to the worst case.
Evaluación de la prueba fecal Liaison® Calprotectin de DiaSorin adaptada al derrame pleural
Authors: de Paz Poves Cristina , Barneo-Caragol Clara , Cillero Sánchez Ana Isabel , Jiménez Mendiguchia Lucía , Quirós Caso Covadonga , Moreno Rodríguez María , López González Francisco J. , Prieto García Mª Belén
Published: December 2023

Objetivos

La calprotectina (CP) es una proteína de unión a calcio y zinc que se suele determinar en muestras fecales, aunque su cuantificación en otros fluidos biológicos podría ser de interés. El objetivo del presente estudio es validar la determinación de CP en líquido pleural mediante quimioluminiscencia.

Métodos

Para la cuantificación de CP en líquido pleural, se utilizó LIAISON®XL, un autoanalizador de quimioluminiscencia. Se diseñó un protocolo de validación empleando tanto materiales de control de calidad suministrados por el fabricante, como soluciones de muestras de líquido pleural. Se evaluaron la estabilidad, imprecisión, sesgo, linealidad, capacidad de detección y efecto de arrastre.

Resultados

La CP permaneció estable en líquido pleural refrigerado durante al menos una semana, y durante cuatro semanas a −80 °C. La imprecisión intradía e interdía observada fue del 2,2 % y del 6,49 %, respectivamente, con un sesgo negativo del 5,51 %. La linealidad del método se verificó hasta los 2000 ng/mL. El límite de cuantificación (LoQ) de la prueba fue de 48,52 ng/mL. Se observó un efecto de arrastre estadísticamente significativo tras medir concentraciones de CP superiores al límite máximo de linealidad. Sin embargo, dada la magnitud observada, no se debe esperar un impacto clínicamente relevante.

Conclusiones

La prueba Liaison® Calprotectin de DiaSorin es fiable para la determinación de CP en líquido pleural.
Asociación entre la 25-hidroxivitamina D y el antígeno prostático específico: un estudio retrospectivo en hombres sin patologías prostáticas
Authors: Laguna Javier , Wijngaard Robin , Hidalgo Susana , González-Escribano Cristina , Ortiz Victoria , Bedini José Luis , Filella Xavier
Published: December 2023

Objetivos

Aunque estudios recientes asocian la vitamina D con el cáncer de próstata, otros estudios descartan una asociación entre esta vitamina y el cáncer de próstata o el antígeno prostático específico (PSA). Dado que no se pueden extraer conclusiones de los datos existentes, realizamos un estudio para analizar la relación entre el PSA y la 25-hidroxivitamina D [25(OH)D].

Métodos

Un total de 415 sujetos sin patologías prostáticas fueron seleccionados, y se clasificaron por edad y concentraciones de 25(OH)D. El análisis estadístico se realizó con la prueba de Shapiro-Wilk, la prueba t de Student, ANOVA, y el coeficiente de correlación de Pearson. Además, se calculó el tamaño mínimo de muestra requerido para obtener resultados estadísticamente significativos en función de la concentración de 25(OH)D. Así mismo, se realizó la prueba t de Student para muestras pareadas para analizar a los individuos con dos determinaciones de PSA espaciadas en el tiempo en los que las concentraciones de 25(OH)D aumentaron o disminuyeron más de un 25 %.

Resultados

Observamos una leve correlación entre la edad y el PSA (r=0,379, p<0,001). Sin embargo, al comparar la concentración de PSA entre grupos en función de 25(OH)D, no se hallaron diferencias significativas (p=0,891): 1,25±1,32 μg/L (grupo con 25(OH)D<50 nmol/L) y 1,17±0,90 (grupo con 25(OH)D≥50 nmol/L). El coeficiente de correlación de Pearson fue casi 0. El tamaño mínimo de la muestra necesario para obtener resultados estadísticamente significativos fue de 815.346 hombres. No observamos diferencias en las concentraciones de PSA en los individuos que se sometieron a dos determinaciones.

Conclusiones

Nuestros resultados muestran que no existe asociación entre los niveles de 25(OH)D y de PSA en hombres sin patologías prostáticas.