bluuebunny/crossref_metadata_2025 huggingface dataset:
Musical Quests in the Kitchen
Authors: Parkinson Tom
Published: October 2022

In this contribution, composer Tom Parkinson discusses his project Musical Experiments for After Dinner, a series of after-dinner musical games. He outlines the origins of the project, the production, and the challenges, and he reflects on the purpose and aims of what it sought to achieve.
Physical properties of Cu2MgSnS4 thin films prepared by chemical spray pyrolysis technique: The effect of thiourea concentration
Authors:   Department of Physics, College of Science, University of Diyala, Iraq, Abdullah Rafal A. , Bakr Nabeel A. ,   Department of Physics, College of Science, University of Diyala, Iraq, Diwate Kiran D. ,   Department of Physics, The P.G.K. Mandal's Haribhai V. Desai College, Pune 411002, India
Published: October 2022

In this work, chemical spray pyrolysis is employed to prepare Cu2MgSnS4 thin films using different concentrations of thiourea (0.14, 0.16, 0.18, 0.20, 0.22, 0.24) M at a substrate temperature of 400 ℃ and thickness of (300±10) nm. The XRD results displayed that all thin films are polycrystalline with tetragonal structure and favorite orientation along the (112) plane. The crystallite size of films is estimated by Scherrer's equation and it was found that it increases with increasing thiourea concentration up to 0.20 M and then it decreases with further increase in thiourea concentration. The FESEM result exhibited the appearance of nanostructures with different particle sizes and shapes. The band gap was estimated using Tauc's relationship and it was found that the value of the band gap increases with increasing thiourea concentration from 1.68 eV at 0.14 M to 1.83 eV at 0.20 M and then it decreases to 1.60 eV at 0.24 M. Raman spectroscopy investigation confirms the purity of the sample formation phase. The main peak for all films is located at about 330 cm-1 . The broadening of this peak in solid solutions can be attributed to the disturbance effects related to the locations of the metal and sulfur atoms in the tetrahedral lattice due to chemical substitutions in the crystalline positions. Hall effect results showed that all films are P-type. The increase in carrier concentration and its motility with increasing thiourea concentrations leads to a decrease in the resistance of the films.
Effect of thulium oxide on structural, refractive index, and optical band gap of bismuth-boro-tellurite glass system
Authors:   Faculty of Defence Science and Technology, National Defence University of Malaysia, Sungai Besi Camp, 57000 Kuala Lumpur, Malaysia, Falihan R. , Hasnimulyati L. ,   Faculty of Applied Sciences, Universiti Teknologi Mara Pahang, 26400 Jengka, Pahang, Malaysia, Abdul-Manaf N. A. ,   Centre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysia, 57000 Kuala Lumpur, Malaysia, Yusoff W. Y. W. ,   Centre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysia, 57000 Kuala Lumpur, Malaysia, Azmi A. H. ,   Centre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysia, 57000 Kuala Lumpur, Malaysia, Azuraida A. ,   Centre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysia, 57000 Kuala Lumpur, Malaysia
Published: October 2022

The bismuth-boro-tellurite glass has been chosen by various analysts from all around the world due to its advantages and ability the improvement of glass technologies. This paper aims to study the structural and optical properties of the bismuth-boro-tellurite glass system with different amounts of thulium oxide as a glass dopant. Four glass sample from chemical composition of [(B2O3)0.25 (TeO2)0.75]0.75 [(Bi2O3)0.25]1-x [Tm2O3]x (x = 0.000, 0.005, 0.010, and 0.015 mol%) were prepared by melt-quenching method with suitable melting and quenching temperature. The Ultraviolet-Visible Spectroscopy (UV-Vis) was used for recording their optical absorption spectra. These optical absorption spectra were used to determine the optical band gap energy, refractive index, and polarizability of all glass samples. While the structural changes are observed using X-ray diffractometer (XRD) and Fourier Transform Infrared Spectroscopy (FTIR).
Effect of Ni content, temperature on the electrical and colorimetric properties of nano NixZn(1-x)O blue pigments
Authors:   Chemistry Department, Faculty of Science, Benha University, Benha, Egypt, Khairy M. , Magdy N. ,   Chemistry Department, Faculty of Science, Benha University, Benha, Egypt, Omran Z. A. ,   Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
Published: October 2022

Nanosized Ni doped ZnO (NixZn1-xO, with 20 ≤ × ≤ 70) were synthesized by simple coprecipitation method at different calcinations temperature (400, 600, 800 and 1000 o C). All synthesized oxides well characterized by XRD, scanning electron microscopy (SEM). The electrical properties and the colorimetric parameters (CIEL L* a* b*) were measured. The results obviously show that Ni2+ ions incorporated into the ZnO structure without difficulty. For the highest concentration of Ni2+ for x = 0.40 and 0.70 of Ni2+ doping, the XRD revealed an extra diffraction peak characteristic to NiO, indicating an upper limit of Ni concentration. The crystallite size was discovered to be between 13 and 109 nm. With the addition of Ni to the ZnO, the temperature dependency of electrical conductivity of samples increases. The temperature dependence of dielectric constant of samples is found to decrease with incorporation of Ni in the solution. The samples show very good blue color with load 20% of Ni.
Study on the photodynamic performance of non-stoichiometric nano-tungsten oxide probe
Authors:   School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, China, Dai L. R. , Zhou J. ,   School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, China, Gao X. F. ,   School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, China, Li J. B. ,   School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, China, Feng B. Y. ,   School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, China, Yao Y. Z. ,   School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, China, Wang Y. M. ,   School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, China, Cui W. W. ,   School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, China, Li X. J. ,   School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, China
Published: October 2022

Photodynamic therapy (PDT) is an effective and new method for tumor therapy but limited by the poor penetration depth of tissue of ultraviolet or visible light as irradiation source. Herein a near-infrared light-responsive W18O49 nanoprobe was synthesized by the solvothermal method for PDT. The structure, morphology, infrared absorption property and the photodynamic performance were analyzed. The results showed that the samples had high crystallinity, uniform and dispersed spindle morphology and an obvious absorption of NIR light. Under the irradiation of 808 nm near-infrared light, 1,3- diphenylisobenzofuran (DPBF) was used as a capture agent for singlet oxygen, and the samples showed excellent photodynamic performance. Then in vitro cell experiments further indicated that the samples good biocompatibility and an evident inhibition effect on tumor cell growth under near-infrared irradiation. The nanoprobe will have a wide application prospect in photodynamic cancer therapy.
Synthesis of Co, Fe co-doped SnO2: characterization and applications
Authors:   Faculty of Mathematics and Material Sciences, Univ. Ouargla, Ouargla 30000, Algeria, Chedala K. , Benhaoua A. ,   Lab. VTRS, Faculty of Science & Technology, Univ. El-Oued, El Oued 39000, Algeria, Hima A. ,   Faculty of Mathematics and Material Sciences, Univ. Ouargla, Ouargla 30000, Algeria, Gheriani R. ,   Department of Electrical Engineering, Fac. Technology, University of El Oued, El Oued, 39000, Algeria, Segueni L. ,   Lab. VTRS, Faculty of Science & Technology, Univ. El-Oued, El Oued 39000, Algeria, Ayachi L. ,   Lab. VTRS, Faculty of Science & Technology, Univ. El-Oued, El Oued 39000, Algeria
Published: October 2022

Thin films of iron and cobalt co-doped tin oxide were deposited by spray pyrolysis technique on heated glass at 480°C with moving nozzle method. The weight ratio of Fe/Co co-doped SnO2 (Fe CTO) changed in the range of 4-16 wt.%. The structural, optical and biological characteristics were carried out by using different characterization techniques, Results from XRD, SEM, EDX and UV-Vis analyses demonstrated successful synthesis shows polycrystalline structures with cassiterite tetragonal crystal phase with a preferential orientation for co-doped SnO2 toward (211), The average grain size of the thin films was found to be 39.29 nm, SEM images showed that all sample having uniform morphology with variant shape upon increasing dopant concentration, Transmittance spectra of all the thin films display high transparency more than 80% in the visible region, and band gap (Eg) varies from 3.49 to 3.75 eV. Antibacterial activity of the doped SnO2 thin films is studied were investigated by agar method as showed good activity against both Gramnegative Escherichia coli (E.coli) and Gram-positive bacteria Staphylococcus aureus (S.aureus).confirming these as future broad-spectrum antibacterial. Thus the preparation is a good candidate for further development into therapeutic formulations.
Field-Dependent Viscoelastic Properties of Graphite-based Magnetorheological Grease
Authors: N.A.M. Nasir  , Nurhazimah  , N. Mohamad  , S.A. Mazlan  , N.A. Nordin  , E.F. Shair  , M.A.A. Rahman
Published: October 2022

This paper highlights the effect of graphite on the dynamic viscoelastic properties of magnetorheological grease (MRG). Two types of MRG namely MRG and graphite-MRG, GMRG with 0 wt.% and 10 wt. % of graphite respectively was synthesized by using a mechanical stirrer. The rheological properties of both sample at various magnetic field strength from 0 to 0.603 T was analyzed via rheometer under oscillatory mode with strain ranging from 0.001 to 1% with fixed frequency at 1 Hz for strain sweep and frequency ranging from 0.1 to 80 Hz at a constant strain of 0.01 % for frequency sweep. Based on the result obtained, the value of storage and loss modulus are dependent on the graphite content. A high value of storage modulus was achieved in the GMRG sample at all applied magnetic field strengths within all frequency ranges. These phenomena related to the contribution of graphite to forming the chain structure with CIPs and offered a more stable and stronger structure as compared with MRG. Moreover, the reduction in the value of loss modulus in GMRG was noticed compared to MRG at on-state conditions reflected by the stable structure obtained by GMRG. Lastly, both samples displayed a strong solid-like (elastic) behavior due to the high value of storage modulus, G’ acquired compared to loss modulus, G’’ at all frequency ranges. Therefore, the utilization of graphite in MRG can be used in wide applications such as brake and seismic dampers.
Deformation Behaviour and Mechanical Response of Closed-cell Cellular Materials under Projectile Impact Using Various Shapes Impactors
Authors: Md. Ashraful Islam  , M.A. Hasib  , M. Hasan  , S. Talapatra
Published: October 2022

Closed-cell cellular materials gained tremendous interest in their application in aerospace, shipbuilding and defence industries due to their exceptional impact energy absorption and lightweight characteristics. To assess the suitability of these materials in practical utilisation, a proper characterisation in dynamic loading is necessary. This paper investigates closed-cell aluminium foam's deformation behaviour due to low-velocity projectile impact in experimentation and finite element analysis. The collapse mechanism was numerically and empirically examined. The experiment and the finite element analysis were found to be in good agreement. The low-velocity projectile impact tests were conducted using an instrumented drop-tower with several projectile tips with an impact energy of 105 J. Finite Element modelling using ABAQUS explicit was undertaken. The results reveal that FE modelling of true foam properties using solid geometry has a good correlation with experimental results. In this study, four impactors/indenters (flat-faced, hemispheric, conical, and truncated-conical) were used. A detailed structural collapse during the low-velocity dynamic impact has been explored with XCT data and finite element tools.
Determination of plasma and tissue distribution of 27-hydroxycholesterol after a single oral administration in a mouse model
Authors: Leoni Valerio , Caccia Claudio , Vitarelli Federica , Civra Andrea , Lembo David , Cavalli Roberta , Adami Marco , Risso Davide , Menta Roberto , Poli Giuseppe
Published: October 2022

Background

The side chain 27-hydroxycholesterol has been reported to inhibit the replication of several pathogen viruses, including herpes simplex virus, rhinovirus, rotavirus and SARS-CoV-2, in in vitro and ex vivo models.

Objective

In view of a future potential therapeutic use of 27-hydroxycholesterol, a pilot pharmacokinetic study was set up.

Methods

This active substance was complexed with 2-hydroxypropyl-β-cyclodextrin and orally administered in a single dose to CD1 male mice; its recovery in plasma and a few tissues up to 24 h post-treatment was evaluated.

Results

The absorption of the oxysterol by the small intestine was moderate, due to its physicochemical properties, but still relevant and rapid, showing a peak at 1 h after supplementation and being almost completed 24 h after treatment. 27-Hydroxycholesterol appeared to be a high hepatic extraction drug, possibly with an extrahepatic component contributing to the total clearance.

Conclusions

Following the oral 25 mg/kg dosing, plasma levels of 27-hydroxycholesterol showed an average steady-state concentration similar to that shown to be able to inhibit the replication of all viruses tested so far in in vitro models.

Significance statement

The first pharmacokinetic data relative to a natural oxysterol administered p.o. are reported. Data should contribute to further elucidate oxysterol pathophysiology and guide non-clinical studies aiming at investigating possible therapeutic use of 27-hydroxycholesterol or its analogs.
Revisión taxonómica de la ictiología marina de Galicia: Clases Cephalaspidomorphi y Elasmobranchi
Authors: Bañón Díaz Rafael
Published: October 2022

En este trabajo se realiza una revisión taxonómica de los peces de Galicia (Clases Cephalaspidomorphi y Elasmobranchi) a través de los distintos tratados y publicaciones ictiológicas publicadas a lo largo de la historia. Se listan un total de 83 especies, de las cuales 14 se consideran dudosas, al no estar su presencia suficientemente demostrada o hay dudas sobre su estatus taxonómico. Una revisión de la nomenclatura científica utilizada nos ha permitido reasignar cinco antiguas denominaciones a nuevas especies, subsanando errores de identificación de otros autores. Esta revisión permite además conocer la primera cita para cada especie en Galicia y establecer una cronología precisa del conocimiento taxonómico histórico de los peces de estos grupos.
Risieri Frondizi o la divergencia axiológica entre holismo metodológico y reduccionismo epistémico
Authors: Diaz Navarro David Ernesto
Published: October 2022

El presente artículo tiene como propósito criticar y reformular la teoría de valores del autor y filósofo argentino Risieri Frondizi. Para ello, se someterán a falsacionismo las tesis según las cuales la cualidad estructural es, primero, estructuralista y no analítica y, segundo, empírica, de acuerdo con la metodología holista de la ciencia. La crítica, así, se desarrollará a partir de los siguientes interrogantes. Inicialmente, ¿el autor acude al holismo o al reduccionismo como enfoques metodológicos de desarrollo? Finalmente, ¿cuál es la distinción lógica entre el valor como cualidad sui géneris y el valor como cualidad estructural?
Tutoría en 1º de Educación Secundaria Obligatoria (ESO). Necesidad de adultos de referencia en el tránsito del Centro de Educación Infantil y Primaria (CEIP) al Instituto de Educación Secundaria (IES) en la Comunidad de Madrid
Authors: Muñoz Agustín
Published: October 2022

El curso de 1.º de ESO es de especial relevancia por la doble transición que vive el alumnado: psicológica, al pasar de la niñez a la adolescencia, y de entorno físico-afectivo, con el paso del CEIP al IES en la enseñanza pública. En este entorno adquiere importancia el papel del tutor como adulto de referencia visible encargado de que el tránsito sea lo más llevadero y educativo. Esta investigación es posible desde la metodología cualitativa que nos permite trabajar en un entorno natural conocido, utilizando como técnica concreta de investigación el grupo de discusión, que posibilita la obtención de datos desde una interacción directa entre la figura del investigador y los participantes en la misma. La muestra está formada por 32 alumnos de 1.º de ESO y 23 profesores con especial incidencia en el mismo nivel. Se enriquece con las aportaciones teóricas pertinentes. Se procede a la realización de los grupos de discusión con el alumnado por un lado y el profesorado por otro. Después del análisis e interpretación de los datos se llega a los resultados, que se enmarcan en una triple implicación: para la persona del tutor, para el IES y para la administración educativa. Por último, se valora su utilidad y se analizan limitaciones y propuestas de mejora.
«Elige tu propia aventura». Recorrido de lectura en pantallas: representaciones adolescentes sobre la lectura en soportes digitales
Authors: Vizio Paula S.
Published: October 2022

Este artículo surge de la tesis Lectura en pantallas: Representaciones adolescentes sobre la lectura en soportes digitales para la Maestría en Tecnología Educativa de la Universidad de Buenos Aires (Argentina). El principal objetivo fue dar cuenta de lo que sucede en cuanto a las prácticas de lectura en soportes digitales y de las representaciones que tienen los jóvenes de los últimos años de la escuela secundaria sobre este tipo de procedimiento, sobre las elecciones en los recorridos de lectura. Se apuntó a realizar un abordaje cualitativo, desde una lógica inductiva, que buscó la generación de categorías de análisis que permitiesen conocer el fenómeno en profundidad. Se utilizó el diseño de teoría fundamentada y el método comparativo constante y el muestreo teórico. Se tomó como unidad de análisis una muestra intencional de alumnos de quinto y sexto año de una escuela secundaria y, a través de entrevistas en profundidad, se apuntó a comprender lo que los jóvenes relatan sobre sus mecanismos de lectura. En un segundo momento, se realizaron observaciones de las prácticas de lectura propiamente dichas y, posteriormente, se agregaron nuevas entrevistas para profundizar lo observado. La finalidad de este trabajo fue caracterizar los recorridos de lectura y así construir nuevos marcos conceptuales para brindar herramientas teóricas que permitan intervenir y modificar los procedimientos ligados a este proceso desde la práctica en las aulas, incorporando conceptos que apunten al desarrollo de estas nuevas capacidades y habilidades que, hasta hoy, han sido desarrolladas de manera intuitiva, no guiada.
Dos modelos de maestra en la escuela de la transición. Un estudio a través de relatos biográficos
Authors: Marcos Martín Raúl , Sonlleva Velasco Miriam , Torrego Egido Luis
Published: October 2022

Este trabajo recoge el testimonio de dos maestras formadas como tales en el final del franquismo y en la transición democrática. Explora cuál fue el papel de las docentes en la transformación de la escuela y en la puesta en marcha de las reformas educativas en el último tercio del siglo XX, una línea de investigación poco abordada en la literatura histórico-educativa. Utiliza como metodología dos relatos de vida, construidos por medio de dieciséis entrevistas semiestructuradas, y complementados con el análisis de documentos públicos y otros aportados por las propias maestras. La investigación muestra cómo, pese a compartir una formación inicial carente de relación con la práctica y de capacitación didáctica, las maestras encarnan, desde sus inicios profesionales, dos maneras diferentes de concebir su compromiso con la educación: uno más crítico, volcado con la renovación y la transformación social y educativa, y otro más tradicional, más cercano a un papel maternal, con mayor consideración de valores como el esfuerzo o la obediencia. La investigación evidencia la importancia de introducir una perspectiva de género en el estudio del papel del profesorado y de las influencias recibidas en el proceso de transformación de la escuela a partir de la transición democrática.
Utilización de cotilos 3D en defectos acetabulares graves
Authors: Troncoso Ignacio , Sabatella Carlos , Blanco O´dena Gonzalo Javier
Published: October 2022

Introducción: Ante el aumento de las artroplastias de cadera en el último siglo, los defectos acetabulares graves son eventos cada vez más frecuentes. Su tratamiento representa un verdadero desafío, debido al déficit y la pobre calidad ósea, habitual en estos pacientes.

Materiales y Métodos: Se presentan 6 pacientes tratados entre 2016 y 2021. Cinco casos de disrupción pélvica por revisiones fallidas, clasificadas como tipo IIIB de Paprosky y una fractura transversal de acetábulo, posible opción de tratamiento en casos de pacientes osteoporóticos.

Resultados: Los pacientes tratados con esta técnica multidisciplinaria fueron controlados durante un promedio de 20 meses, ninguno presentó complicaciones posoperatorias. Los resultados valorados con escalas analógicas son prometedores e invitan a establecer este procedimiento como el patrón de referencia.

Conclusiones: La evaluación estricta es necesaria en los defectos acetabulares. La inclusión de ingeniería informática médica permite estudiar la necesidad de usar injerto de banco, fabricar implantes a medida de titanio/tantalio trabecular multiporos, lo que es ideal paralograr la osteointegración, sumado a la posibilidad de planificar la dirección y la longitud de los tornillos al hueso remanente, según su calidad. La cementación de un cotilo de doble movilidad dentro del implante a medida disminuye el riesgo de luxación y de sobrecarga de este último, al eliminar la fricción metal-metal.
Carta al Editor
Authors: Moya Daniel , Olivieri Herminio , Crosa Juan Ignacio
Published: October 2022

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The Copenhagen Wooden Stela AAd6 from the National Museum of Denmark: An unusual Testimony of the 22nd Dynasty
Authors: Wüthrich Annik
Published: October 2022

The subject of this article is a wooden stela (AAd6) kept in the National Museum of Denmark in Copenhagen. By iconographical and typological criteria, this object is datable to the 22nd Dynasty and probably comes from the Theban area. The stela displays several particularities, among others, one of the longest genealogies preserved on this object type. Alongside a careful investigation of the different iconographical elements and a new translation of the text, this contribution looks into the onomastic and the prosopographical material, examining different titles such as “ḥnk-nw.w-priest in southern Heliopolis” or “wab-priest in chief of the estate of Mut, the great one, the mistress of Isheru.” This study not only reconstitutes the family tree but also connects this object with three others, that are datable to a timeframe from the 21st Dynasty to the beginning of the 26th Dynasty. An excursus focusing on the painting sequence of the text and depictions contributes to a better understanding of the creation of wooden stelae in the Third intermediate Period.
Alterações micrometeorológicas com uso de cobertura plástica em cultivo de videira ‘Niágara rosada’
Authors: Schöffel Edgar Ricardo , Borges Amanda da Fonseca , Novelini Liliane , Santos Patricia Marques , Trentin Roberto
Published: October 2022

Cultivos protegidos são alternativas diante da sazonalidade e adversidades climáticas. Estudos que avaliem diferentes ambientes de cultivo são importantes para compreender os processos adaptativos das espécies. O trabalho teve como objetivo determinar variações na radiação solar e na temperatura do ar ocasionadas pelo uso de cobertura plástica em cultivo de videira ‘Niágara rosada’. O experimento foi realizado numa propriedade familiar, por duas safras, em um ambiente com cobertura plástica impermeável e em outro ambiente sem cobertura, cultivados com videira no sistema de condução latada. Na safra 2014/15, com baixa nebulosidade, a radiação solar global média foi de 22,4 MJ m-2 dia-1, no ambiente sem cobertura, e de 14,4 MJ m-2 dia-1, no ambiente com cobertura plástica. Na safra 2015/16, com grande nebulosidade, a radiação solar global foi de 12,9 e de 8,9 MJ m-2 dia-1, nos ambientes sem e com cobertura plástica, respectivamente. As temperaturas mínimas do ar não foram afetadas pela cobertura plástica e as temperaturas médias e máximas foram maiores no ambiente coberto. Acima do dossel, as temperaturas médias do ar foram acrescidas em mais de 2,0 °C e as temperaturas máximas em mais de 8,6 °C.
Palavras-chave: Microclima; plasticultura; uva de mesa; elementos meteorológicos.
Construção Axiomática dos Números Racionais à Luz dos Três Mundos da Matemática
Authors: Viaro Flôres Marcia , Bisognin Vanilde
Published: October 2022

Os números racionais são trabalhados na Educação Básica, porém se questiona qual o lugar que ocupam nos cursos de licenciatura e qual abordagem é dada quando esse conteúdo é ministrado para futuros professores de matemática. Nesse contexto, o objetivo do trabalho é investigar como os princípios da teoria dos Três Mundos da Matemática, preconizada por David Tall, podem sustentar uma proposta de formação de futuros licenciados em matemática sobre conceitos relacionados aos números racionais e perceber quais resultados a proposta produz nas aprendizagens desses conceitos. Os sujeitos desse estudo são oito estudantes de um Curso de Licenciatura em Matemática. Essa pesquisa é qualitativa, sendo organizada com base em uma sequência de ensino fundamentada na teoria escolhida. Além do auxílio na construção das tarefas, a teoria também foi utilizada nas análises dos dados, os quais foram coletados por meio das produções dos estudantes. Com os resultados, percebeu-se que a maioria dos estudantes teve suas produções com características do Mundo Simbólico, com indícios do Mundo Formal, ilustrando, assim, a importância da construção axiomática dos números racionais na formação dos estudantes.
Palavras-chave: Ensino; aprendizagem; formação de professores.
Enhanced camber and deflection estimation for AASHTO prestressed concrete girders
Authors: Almohammedi Ahmed , Dang Canh N. , Murray Cameron D. , Hale W. Micah
Published: October 2022

The current camber prediction procedure in the PCI Design Handbook: Precast and Prestressed Concrete results in variations between the design and the actual camber. These variations create difficulties in maintaining the design thickness of the bridge deck and the design longitudinal profile. This research aims at enhancing the PCI design method of estimating long-term camber and deflection of prestressed concrete girders. Field measurements included monitoring cambers for a total of 94 girders from fabrication through the erection at bridge sites. Compressive strength and modulus of elasticity were measured for several girders, and the results were compared with the design properties. The differences between the design and actual concrete properties were found to be the main reason for overestimation in camber and deflection. A modification to the PCI camber prediction method is proposed to improve the accuracy of predicting the erection camber based on field measurements and material tests on four types of bridge girders.
Behavior of reinforcing bar connections of hollow-core slabs to masonry walls under in-plane forces
Authors: Brito Susana Hernandez , Mahmoud Karam , Truderung Karl , El-Salakawy Ehab
Published: October 2022

Integrity ties are necessary in hollow-core slab floors as connections to prevent floor displacements under lateral loads and maintain the overall structural integrity of buildings. In Eastern Canada, the integrity tie for hollow-core slabs on masonry walls usually consists of a 10M (no. 3), L-shaped steel bar that is hammered into the supporting wall and grouted to the slabs. However, current North American design codes do not offer sufficient provisions to determine the capacity or predict the mode of failure of these ties and connections. This paper introduces the results of testing nine full-scale reinforcing bar connection assemblies under monotonic in-plane forces (compression, tension, and shear) until failure. Test parameters in this study included direction and orientation of the in-plane loading, the bearing type of the hollow-core slabs, and the use of adhesive. Test results showed that connections with dry-fit bars tested under compression failed by bar yielding followed by masonry beam crushing. In addition, the mode of failure under tension forces was governed by the loss of bearing of the slabs due to bar pullout and cover spalling. Under shear forces, the connection failed by bar yielding. Finally, the connections with adhesive had a similar mode of failure compared to their counterparts with dry-fit bars, but these did not show bar pullout from the masonry beam, therefore demonstrating higher stiffness.
Time domain speech scrambler based on particle swarm optimization
Authors: Hasan Zahraa A. , Hadi Suha M. , Mahmoud Waleed A.
Published: October 2022

Speech scrambler is used to transform clear speech into an unintelligible signal to prevent eavesdropping. The speech scrambling algorithm involves the permutation of speech segments depending on a specific permutation matrix which may be fixed or dynamic during encryption. A fixed permutation matrix is easy to break and has given high residual intelligibility in the scrambled signal. The proposed scheme used a particle swarm optimization algorithm to generate a dynamic permutation array that can attain a high degree of security. The outcome of the scrambled speech signal does not have any residual intelligibility, and the quality of the descrambled speech is extremely satisfying, with zero mean squared error.
Multimodal amusement resonance as a conversation interactional device
Authors: Tao Hongyin
Published: October 2022

The incorporation of materials from the previous speaker in subsequent speaker talk has been variably characterised as repetition (Tannen, 1987), format tying (M. Goodwin, 1990), resonance (Du Bois, 2014) and so forth (henceforth “resonance”). Resonance has been shown to be a pervasive feature of everyday talk-in-interaction. This paper, with data from Mandarin Chinese and American English, shows first that resonance can manifest in multiple modalities, namely morphosyntax, prosody and embodied actions, often simultaneously. Second, it will be shown that the next speaker often does this in the service of creating an amusing effect, or conversational humour. It is proposed that multimodal resonance with amusing effects is an uplifting device in conversation that has a unique impact on the way interaction is managed. As such, investigating such a practice can further our understanding of resonance as a pervasive interactional phenomenon and how multimodality is deployed for coherent courses of action.
Max Steiner’s Jewish Identity and Score to Symphony of Six Million (1932)
Authors: Fruchtman Aaron
Published: October 2022

Max Steiner was one of a significant group of Jewish composers who flourished during Hollywood’s Golden Age. Steiner’s Jewish heritage is rarely discussed in connection with his film music. However, his original underscore for Symphony of Six Million (1932) is revealing. In this essay, I consider how Steiner dealt with Jewish identity when presenting an “insider’s view” of the Lower East Side to a mainstream American audience. Steiner may have used Jewish musical materials for “local color” in a manner typical of evocations of musical exoticism in Hollywood. While aspects of this score border on melodramatic pastiche, a searching analysis reveals that Steiner drew from Jewish sacred and secular musical materials to create a trenchant, intertextual context. Steiner’s relationship to his Jewish identity is enigmatic. The Steiner family envisioned themselves as completely assimilated and thoroughly Viennese. Even so, one could not help but have a Jewish identity in fin de siècle Vienna. Steiner’s words, music, and philanthropy reveal a complex Jewish identity.
Composing Himself
Authors: Platte Nathan
Published: October 2022

The beginning of Steiner’s Hollywood career is typically overlooked in studies of the composer, in part because scrutiny of his work hinges on film scores attached to celebrated films. This article argues that Steiner’s initial years are vital in understanding how a former Broadway music director exploited musical opportunities in Hollywood to develop a new career profile grounded in composition. Through his eclectic labors at RKO Radio Pictures and his connections with commentators in the trade press, Steiner formed a new and necessary position that extended beyond the arranging of numbers for musicals to the composition of incidental music for films of various genres.
AVALIAÇÃO DA COMPLETUDE DOS REGISTROS DE LEISHMANIOSE TEGUMENTAR AMERICANA EM ÁREA ENDÊMICA DO MARANHÃO DE 2017 A 2020
Authors: Oliveira Lorena de Albuquerque Pinheiro , Assunção Anne Karine Martins , Simoes Neto Eudes Alves , Silva Mayara da
Published: October 2022

Este trabalho objetiva avaliar a completude dos dados das fichas de notificação compulsória de Leishmaniose Tegumentar Americana (LTA) em área endêmica do Maranhão no período de 2017 a 2020. Estudo descritivo e quantitativo realizado a partir de dados das fichas de notificação de diagnosticados com LTA registradas na Regional de Saúde de Pinheiro – MA no período referido. Os campos de preenchimento das fichas foram categorizados em campos-chave, de preenchimento obrigatório e de preenchimento essencial. A completude dos dados foi avaliada em completude boa, regular, baixa e muito baixa. Os dados foram codificados e inseridos no programa Excel for Windows® 2016, versão 1807, segundo as variáveis de interesse no estudo. A análise estatística foi realizada no programa Excel e no software SPSS, versão 24.0, incluindo o cálculo de incidência de cada ano e o de frequências absolutas e relativas, apresentadas na forma de tabelas. Predominou a completude boa geral das fichas e das variáveis obrigatórias, porém as variáveis essenciais apresentaram escores expressivos de completude regular, baixa e muito baixa. Com a capacitação dos preenchedores e atualização no instrucional de preenchimento, espera-se melhorar a qualidade das informações referentes à LTA no Estado.
PREPARATION AND APPLICATION OF CHITOSAN/ATTAPULGITE COMPOSITE FLOCCULANT
Authors: Zhong Yuan , Wu Jie , Wang Su-Zhen , Tang Seng
Published: October 2022

A chitosan/attapulgite (CS/ATP) composite flocculant with excellent adsorption was prepared from chitosan (CS) and attapulgite clay (ATP). The micro morphology and structure of the composite flocculant were characterized with SEM and IR. The effect of the CS/ATP composite flocculant on the recovery of the main components from the bezafibrate (BZ) wastewater of a pharmaceutical plant was investigated. The influences of the flocculation temperature, mixing time and standing time on the flocculation effect were investigated by determining the BZ content of the recovered crude products as the evaluation index so as to obtain the best recovery process. The experimental results show that the best flocculation condition is created when we add 20 mg/mL of CS/ATP to the waste liquid, stir it at 30 °C for 10 min and allow it to stand for 30 min. Compared with the traditional recovery process, the BZ content of the recovered crude products can be increased from 47 % to 74 % when using the CS/ATP composite flocculant. This flocculant can effectively overcome the defects of single material residues and difficult separation, accelerate the settlement of impurities in a waste liquid effectively, and can be used in the field of solution clearing and waste liquid separation.
Tüketicilerin Açık Artırma Siteleri Hakkındaki Tutumlarını Belirlemeye Yönelik Bir Uygulama
Authors: TÜRKOĞLU Musa , DURAN Gülhan , YETİŞEN Serdar
Published: October 2022

Literatürde bu konuda yapılan çalışmaların eksikliği nedeniyle konu ele alınmıştır. Çalışma; tüketicilerin alışveriş alışkanlıkları ile çevrimiçi açık artırma hizmetlerinin kullanımı, hizmet kalitesinde yaşanan sorunların belirlenmesi, tüketicinin istek ve ihtiyaçlarının belirlenerek tüketicilere uygun zaman tasarrufu sağlayan ve yenilikçi hizmetin oluşturulması amacıyla hazırlanmıştır. Tüketiciden tüketiciye açık artırma sistemlerine kapsamlı yaklaşmayı, tüketicilerin e-açık artırma siteleri hakkındaki tutumlarını belirlemeyi amaçladığı için önem arz etmektedir. Anket yöntemi kullanılarak veri toplanmış ve toplanan veriler üzerinde faktör ve Anova analizi uygulaması yapılmıştır. Tüketicilerin açık artırma siteleri hakkındaki düşünceleri “güven”, “satın alma süreci”, “rekabet”, “bütçe” faktörleri çerçevesinde değerlendirilmiştir. Tüketicilerin faktör ve Anova testleri ile tüketici davranışları üzerinde “güven” P: 0,047 < 0,05 gelire bağlı olarak anlamlı şekilde farklılık gösterdiği, “satın alma süreci” P: 0,013 < 0,05 yaşa bağlı olarak anlamlı farklılık olduğu, “rekabet”, P:0,032 <0,05 cinsiyete bağlı olarak anlamlı, “bütçe” P: 0,046 < 0,05) gelire ve eğitime (F: 3, 422 - P: 0,031 <0,05) bağlı olarak anlamlı bir şekilde farklılık gösterdiği tespit edilmiştir.
Temel Makroekonomik Faktörler ve Nüfusun İşsizliğe Etkileri: OECD Ülkeleri Üzerine Panel Veri Analizi
Authors: ALKAYA Aylin , IŞIK Perihan
Published: October 2022

Çalışmanın amacı, işsizlik boyutları üzerinde makroekonomik faktörlerden enflasyon, kamu büyüklüğü, yatırım, dışa açıklık, işgücü piyasası düzenlemeleri ve demografik faktörlerden nüfusun etkisini araştırmaktır. Çalışmada işsizliğin; toplam işsizlik, genç işsizlik, kadın işsizlik, eğitimli işsizlik ve uzun dönem işsizlik boyutları ele alınmıştır. OECD üyesi ülkelerin 2010-2018 dönemine ait çalışma değişkenleri panel verilerine dayalı panel veri analizi uygulanmıştır. Panel veri analizlerinden biri olan panel regresyon analiziyle çalışmanın amacı gerçekleştirilmeye çalışılmıştır. Panel regresyon analizi sonucunda dışa açıklık, kamu büyüklüğü, yatırım, enflasyon, işgücü piyasası düzenlemeleri ve nüfusun işsizliğin tüm boyutları üzerinde birlikte istatistiksel olarak anlamlı etkisinin olduğu belirlenmiştir.
Адаптация мигрантов из сельской местности Дагестана в Махачкале и Астрахани: причины различий
Authors: Стародубровская Ирина Викторовна , Идрисов Эльдар Шамигуллович , Казенин Константин Игоревич
Published: October 2022

В статье сопоставляются особенности интеграции мигрантов из сельского Дагестана в двух крупных городах – Астрахани и Махачкале. Миграция дагестанских горцев в эти два города, хотя и в разных масштабах, проходила практически одновременно, однако ее социальные результаты, как показало полевое исследование авторов, в двух городах были принципиально разными. Если в Астрахани реализовывалась модель интеграции в мейнстрим принимающего сообщества, то миграция горцев в Махачкалу дала яркий пример так называемой сегментной ассимиляции: там для второго поколения мигрантов было характерно вписывание в первую очередь в криминальную и радикальную исламскую контркультуры, что вело к значительному росту уровня конфликтности в городской среде. Возможные причины выявленных различий рассматриваются в контексте современных теоретических подходов к исследованию миграции. Показано, что успешность адаптации мигрантов в городах определяется не только особенностями переселенческого сообщества, но и характеристиками принимающего социума. Проведенное исследование демонстрирует, что в условиях позитивного настроя местного сообщества по отношению к мигрантам вероятным исходом даже для культурно замкнутых традиционных групп может быть не добровольная сепарация, которую нередко ожидают в таких случаях специалисты, а постепенная, хотя и медленная, интеграция в культуру принимающего сообщества.
Избыточная летняя смертность детей и подростков: эффект длинных школьных каникул?
Authors: Кузнецова Полина Олеговна , Малева Татьяна Михайловна
Published: October 2022

В работе представлен анализ сезонности общей смертности в младших возрастах в России на фоне других стран. Для декомпозиции временного ряда на тренд, сезонность и случайную компоненту и проведения тестов на сезонность использовали процедуру TRAMO SEATS, примененную к краткосрочным данным о смертности Short-term Mortality Fluctuations Human Mortality Database в 2000-2020 гг. Летнюю сезонность оценивали как соотношение средней смертности летом к средней смертности за год после исключения из временного ряда трендовой компоненты.

В России наблюдается значительная летняя сезонность смертности детей и подростков: в возрасте 5-9 лет смертность в летние месяцы превышает смертность в среднем за год на 21%, 10-14 лет – на 32%, 15-19 лет – на 19%.

В подавляющем большинстве стран, включенных в анализ, сезонность детской смертности в целом и летняя сезонность в частности выражены заметно слабее, чем в России, особенно в возрастных группах 5-9 и 10-14 лет. Лишь после 15 лет избыточная летняя смертность в младших возрастах в других странах становится относительно распространенным явлением.

Выраженная сезонность смертности в младших возрастных группах наряду с прочим может быть следствием длинных школьных каникул, во время которых многие дети оказываются предоставленными самим себе. Для проверки этой гипотезы мы сопоставили длительность каникул в странах, присутствующих в базе данных STMF, с сезонностью смертности детей и подростков. Было показано, что существует значимая положительная зависимость между этими показателями: большая длительность каникул соответствуют более ярко выраженной летней сезонности в количестве смертей, причем этот результат сохраняется для различных возрастных групп.
Мобилизуя одиноких матерей: демографическая политика в послевоенном СССР
Authors: Россман Элла
Published: October 2022

Рецензия на монографию Миэ Накачи, посвященную исследованию советской демографической политики при Сталине и Хрущеве, и основанной на ранее скрытых архивных материалах, которая показывает, что решения, принятые во время и после Второй мировой войны под рубриками «семейного права» и пронатализма, создавали общество несостоятельных браков, «безотцовщины» и абортной культуры. Эта книга обязательна к прочтению всем, кто хочет узнать не только о репродуктивном поведении в условиях демографической катастрофы, но и о кухне советских политиков.
LAPAROSKOPİK ve AÇIK YÖNTEM İLE KOLOREKTAL CERRAHİ YAPILAN HASTALARIN KARŞILAŞTIRILMASI
Authors: TAMAM Selim , ERGÜL Zafer , TOKGÖZ Serhat , KAYA İsmail Oskay
Published: October 2022

Amaç

Laparoskopik kolorektal cerrahi günümüzde birçok

merkezde yaygın olarak kullanılan bir yöntem halini

almıştır. Çalışmamızda laparoskopik ve açık kolorektal

cerrahi uygulanan olgularda postoperatif klinik ve

onkolojik sonuçların karşılaştırılması ve literatür ile kıyaslanması

amaçlanmıştır.

Gereç ve Yöntem

Dışkapı Yıldırım Beyazıt Eğitim ve Araştırma Hastanesi

genel cerrahi kliniğinde Ocak 2012 ile Aralık

2018 tarihleri arasında kolorektal cerrahi uygulanan

hastaların verileri retrospektif olarak incelenmiştir.

Bulgular

Çalışmamıza 438’i (%80,5) açık, 73’ü (%13,4) laparoskopik,

33’ü (%6,1) konversiyon ile rezeksiyon

uygulanan toplam 544 hasta dahil edildi. Seride acil

opere edilen vaka sayısı 158 (%29,0), elektif vaka sayısı

386’dır (%71,0). Toplam 156 (%28,7) postoperatif

komplikasyon saptanmış olup, gruplara göre değerlendirildiğinde;

laparoskopik cerrahi grubunda postoperatif

komplikasyon 20 (%27,4), açık cerrahi grubunda

126 (%28,8), konversiyon grubunda 10 (%30,3)

postoperatif komplikasyon saptanmıştır. Rektum

kanserlerinde ortalama çıkarılan lenf nodu sayıları

açık prosedürde 19,0±9,7, laparoskopik prosedürde

22,3±11,6’ dir (p:0,198). Laparoskopik ve açık cerrahi

grubundaki rektum kanseri olgularında sırasıyla 1

(%2,3) ve 8 (%5,9) hastada pozitif çevresel cerrahi

sınır saptanmıştır (p:0,456). Ortalama distal cerrahi

sınır açık grupta 45,1±39,8, laparoskopik grupta

41,1±37,7 ’dir (p:0,608).

Sonuç

Laparoskopik kolorektal kanser cerrahisi klinik ve onkolojik

sonuçlar yönünden açık prosedür ile karşılaştırılabilir

sonuçlara sahiptir. Minimal invaziv cerrahinin

bilinen birçok avantajı göz önüne alındığında laparoskopik

cerrahi muhtemelen kolon kanseri için standart

tedavi haline gelecektir.
Visibilidad del deporte femenino en la prensa deportiva digital española
Authors: Roca Marín Delfina , Navarro García Eva María
Published: October 2022

Las noticias deportivas tienen una gran demanda social en España. Sin embargo, a pesar de que hombres y mujeres están interesados en este tipo de publicaciones, y de que ambos practican deporte, los medios de comunicación españoles se centran casi exclusivamente en dar cobertura a los eventos deportivos protagonizados por el sexo masculino. Esta investigación se centra en analizar cuál es la visibilidad dada al deporte femenino en comparación con el masculino y conocer qué grado de desigualdad existe entre ambos sexos en la prensa digital mediante una metodología centrada en el análisis de contenido. Se demuestra que el deporte femenino es totalmente invisible en la prensa digital deportiva española (Marca y AS) estudiada y que, a día de hoy, no se están tomando medidas para mejorar la situación que sufren las deportistas ni para lograr una igualdad efectiva entre géneros. Las aportaciones realizadas ponen de relieve la necesidad de que se implanten medidas concretas en materia de difusión de la información deportiva a nivel nacional, para conseguir que el deporte femenino esté más presente en los medios de comunicación y se haga un tratamiento mediático menos estereotipado y un uso del espacio informativo igualitario.
Joining and Gaining Knowledge From Digital Literacy Courses: How Perceptions of Internet and Technology Outweigh Socio-Demographic Factors
Authors: Lev-On Azi , Abu-Kishk Hama , Steinfeld Nili
Published: October 2022

Many government-sponsored policies and programs have been implemented in recent years to reduce digital inequality, but research on the effectiveness of such programs is severely lacking. We examine the short-term effects of participation in Lehava, the largest such program in Israel. Participants in our study completed a survey before and after taking introductory computer and internet classes. The findings demonstrate that motivations for participating in the program (measured before taking the course), as well as knowledge gains (i.e., differences between levels of familiarity with concepts before and after taking the course), were predicted almost exclusively by participants’ perceptions of technology and the internet, and not by socio-demographic or other variables. We conclude by discussing the significance of perceptions over and above socio-demographic considerations for bridging digital inequality gaps.