bluuebunny/crossref_metadata_2025 huggingface dataset:
Personifikasi dalam Lirik Lagu “Mencari Cinta” dan “Menemaniku” Band Noah dalam Album Keterkaitan Keterikatan
Authors: Amin Mujid
Published: December 2020

This paper was prepared with the aim of knowing the function of the personification style in the lyrics of the song Finding Love and Menemaniku, which was created by the Band Noah. The method used in this research includes two methods, namely methods in linguistics and stylistics. The results obtained in this study are that the personified language style is a language style that can give strength to something as if it can carry out activities / actions such as activities / actions carried out by living things (animals, humans,). The personified language style has a function to describe the atmosphere as if it were real and alive, and can also bring out the atmosphere, impressions / images of certain senses; at the same time it can create beauty (aesthetics) that is in the song lyrics.
THE ‘RIGHT TO THE CITY’ ON VARIOUS SCALES
Authors: NOWAK MAREK
Published: December 2020

The introduction to this volume pursues two aims. On the one hand, it refers to the problem of distinguishing between ‘right to the city’ initiatives and ‘urban city movements’ as phenomena embedded in different structural moments of society. On the other hand, it attempts to propose a supplement to the discussion about the aforementioned phenomena. This supplement addresses the need to take into account different scales by which the phenomena of self-organisation in the city are analysed. The article offers an example of such analysis referring to the Central European and the Polish perspectives, treating the two stories as separate to a certain extent. As it turns out, each of them offers a slightly different reasoning and different contexts for understanding the evolution of phenomena as well as separate decisive factors shaping the empowerment processes. The reader finds here references to research analysis in sociology, urban and economic history, supplementing the existing knowledge. The proposed interpretation is intended to lead to a discussion on the need to comprehend local and regional specifics in universalising studies.
Corina Löwe & Åsa Nilsson Skåve (red.), Didaktiska perspektiv på hållbarhetsteman i barn- och ungdomslitteratur
Authors: Källström Lisa
Published: December 2020

Review/Recension
CBCT Imaging Of A Giant Sialolith (Megalith)
Authors: Ahmad Buch Sajad , G Babu Subhas , Hegde Shruthi , Rao Shruthi , Ajila Vidya
Published: December 2020

Background: A 25-year-old man presented to the Department of Oral Medicine and Radiology with a painful and persistent discharge under the tongue on right side of the mouth. The patient complained of repeated episodes of pain before, during and after food intake with a recent episode of fever. Panoramic radiograph showed a radio-opaque mass superimposing over right mandibular angle region (Figure 1). Cone Beam Computed Tomography (CBCT) was obtained for the description and location of the radio-opaque mass. Multiple planar images were constructed which showed a round sialolith measuring around 22 mm x 18mm, in coronal section (Figure 2) and Three-Dimensional (3D) reconstruction (Figure 3). Key words: Sialolithiasis; sialography; cone beam computed tomography;
Endogenous Cholinergic Signaling Modulates Sound-Evoked Responses of the Medial Nucleus of the Trapezoid Body
Authors: Zhang Chao , Beebe Nichole L. , Schofield Brett R. , Pecka Michael , Burger R. Michael
Published: December 2020

The medial nucleus of trapezoid body (MNTB) is a major source of inhibition in auditory brainstem circuitry. The MNTB projects well-timed inhibitory output to principal sound-localization nuclei in the superior olive (SOC) as well as other computationally important centers. Acoustic information is conveyed to MNTB neurons through a single calyx of Held excitatory synapse arising from the cochlear nucleus. The encoding efficacy of this large synapse depends on its activity rate, which is primarily determined by sound intensity and stimulus frequency. However, MNTB activity rate is additionally influenced by inhibition and possibly neuromodulatory inputs, albeit their functional role is unclear. Happe and Morley (2004) discovered prominent expression of α7 nAChRs in rat SOC, suggesting possible engagement of ACh-mediated modulation of neural activity in the MNTB. However, the existence and nature of this putative modulation have never been physiologically demonstrated. We probed nicotinic cholinergic influences on acoustic responses of MNTB neurons from adult gerbils (Meriones unguiculatus) of either sex. We recorded tone-evoked MNTB single-neuron activityin vivousing extracellular single-unit recording. Piggyback multibarrel electrodes enabled pharmacological manipulation of nAChRs by reversibly applying antagonists to two receptor types, α7 and α4β2. We observed that tone-evoked responses are dependent on ACh modulation by both nAChR subtypes. Spontaneous activity was not affected by antagonist application. Functionally, we demonstrate that ACh contributes to sustaining high discharge rates and enhances signal encoding efficacy. Additionally, we report anatomic evidence revealing novel cholinergic projections to MNTB arising from pontine and superior olivary nuclei.

SIGNIFICANCE STATEMENTThis study is the first to physiologically probe how acetylcholine, a pervasive neuromodulator in the brain, influences the encoding of acoustic information by the medial nucleus of trapezoid body, the most prominent source of inhibition in brainstem sound-localization circuitry. We demonstrate that this cholinergic input enhances neural discrimination of tones from noise stimuli, which may contribute to processing important acoustic signals, such as speech. Additionally, we describe novel anatomic projections providing cholinergic input to the MNTB. Together, these findings shed new light on the contribution of neuromodulation to fundamental computational processes in auditory brainstem circuitry and to a more holistic understanding of modulatory influences in sensory processing.
Transition of young adults with endocrine and metabolic diseases: the ‘TRANSEND’ cohort
Authors: Le Roux Enora , Menesguen Florence , Tejedor Isabelle , Popelier Marc , Halbron Marine , Faucher Pauline , Malivoir Sabine , Pinto Graziella , Léger Juliane , Hatem Stephane , Polak Michel , Poitou Christine , Touraine Philippe
Published: December 2020

Objective

The transition from paediatric to adult medicine involves risks of poor patient outcomes and of significant losses of patients to follow up. The research aimed to analyse the implementation in an initial cohort of patients of a new programme of transition to adult care based on a case management approach.

Design

A longitudinal study of the case management approach to transition, initiated in a university hospital in France in September 2016.

Methods

Patients with the endocrine or metabolic disease diagnosed during childhood and transferred to adult care were included. The transition programme includes three steps based on case management: liaising with paediatric services, personalising care pathways, and liaising with structures outside the hospital (general practitioners, agencies in the educational and social sector).

Results

The cohort included 500 patients, with malignant brain tumour (n = 56 (11%)), obesity (n = 55 (11%)), type 1 diabetes (n = 54 (11%)), or other disease (n = 335 (67%)). Their median age at transfer was 19, and the sex ratio was 0.5. At median 21 months of follow-up, 439 (88%) had a regular follow-up in or outside the hospital, 47 (9%) had irregular follow-up (absence at the last appointment or no appointment scheduled within the time recommended), 4 had stopped care on doctor’s advice, 4 had died, 3 had moved, and 3 had refused care. The programme involved 9615 case management actions; 7% of patients required more than 50 actions. Patients requiring most support were usually those affected by a rare genetic form of obesity.

Conclusions

Case managers successfully addressed the complex needs of patients. Over time, the cohort will provide unprecedented long-term outcome results for patients with various conditions who experienced this form of transition.
Overcoming oncogene addiction in breast and prostate cancers: a comparative mechanistic overview
Authors: Blatt Eliot B , Kopplin Noa , Kumar Shourya , Mu Ping , Conzen Suzanne D , Raj Ganesh V
Published: December 2020

Prostate cancer (PCa) and breast cancer (BCa) are both hormone-dependent cancers that require the androgen receptor (AR) and estrogen receptor (ER, ESR1) for growth and proliferation, respectively. Endocrine therapies that target these nuclear receptors (NRs) provide significant clinical benefit for metastatic patients. However, these therapeutic strategies are seldom curative and therapy resistance is prevalent. Because the vast majority of therapy-resistant PCa and BCa remain dependent on the augmented activity of their primary NR driver, common mechanisms of resistance involve enhanced NR signaling through overexpression, mutation, or alternative splicing of the receptor, coregulator alterations, and increased intracrine hormonal synthesis. In addition, a significant subset of endocrine therapy-resistant tumors become independent of their primary NR and switch to alternative NR or transcriptional drivers. While these hormone-dependent cancers generally employ similar mechanisms of endocrine therapy resistance, distinct differences between the two tumor types have been observed. In this review, we compare and contrast the most frequent mechanisms of antiandrogen and antiestrogen resistance, and provide potential therapeutic strategies for targeting both advanced PCa and BCa.
Cytokine concentrations direct endothelial function in pregnancy and preeclampsia
Authors: Mauro Amanda K , Khurshid Nauman , Berdahl Danielle M , Ampey Amanda C , Adu Daniel , Shah Dinesh M , Boeldt Derek S
Published: December 2020

Endothelial dysfunction is a prominent feature of preeclampsia, a hypertensive disorder of pregnancy, and contributes to multiple symptoms characteristic of the syndrome. A myriad of growth factors and cytokines are dysregulated in preeclampsia as compared to normal pregnancy, however, a complete appreciation of the effect of changing concentrations of these factors on endothelial function is lacking. In this study, we evaluate the effect of a variety of growth factors and cytokines on Ca2+ signaling and monolayer integrity. We report that VEGF165, TNFα, EGF, and IL-1β either improve or inhibit Ca2+ signaling depending on dose, whereas TNFα and IL-1β reduce monolayer integrity and bFGF increases monolayer integrity. Additionally, to model the effects of combinations of growth factors and cytokines, we screened for Ca2+ signaling changes in response to 16 dose combinations of VEGF165 and TNFα together. This revealed an optimal combination capable of supporting pregnancy-adapted Ca2+ signaling, and that changes in either VEGF165 or TNFα dose would result in a shift toward suppressed function. This study shows in detail how growth factor or cytokine concentration effects endothelial cell function. Such data can be used to model how changing growth factor and cytokine levels in normal pregnancy may contribute to healthy endothelial function and in preeclampsia may promote endothelial dysfunction. The results of VEGF165 and TNFα combination treatments suggest that more complex growth factor and cytokine combination modeling may be important in order to more accurately understand the effects of circulating factors on the endothelial function.
Factores de satisfacción e insatisfacción en los docentes administrativos de instituciones de educación superior: Un estudio exploratorio en periodo de COVID-19
Authors: Nataly Guiñez Cabrera , Fabiola Jeldes Delgado , Katherine Mansilla Obando , Francisco Ganga Contreras
Published: December 2020

La pandemia del COVID-19 fue declarada por la organización mundial de la salud (OMS) una emergencia de salud pública de preocupación internacional el 30 de enero de 2020. Esta contingencia sanitaria mundial provocó grandes cambios en muchos ámbitos y la educación superior no fue la excepción. La migración masiva de la educación presencial a la educación online desafió el quehacer de muchos, entre ellos a los docentes administrativos de instituciones de educación superior (IES). El objetivo de este estudio fue explorar los principales factores de satisfacción e insatisfacción en los docentes administrativos de IES que están enfrentando el gran desafío de administrar las instituciones de forma remota a distancia, por la protección sanitaria de la población en tiempos de COVID-19, con la finalidad de generar información que posibilite mejorar las decisiones cuando se tengan que enfrentar contingencias similares. Para ello se realizó una investigación cualitativa con 26 docentes administrativos de IES utilizando la técnica de incidentes críticos para recopilar y analizar los datos, recolectando un total de 181 incidentes críticos. Los incidentes críticos fueron analizados con la teoría de los dos factores de Herzberg (1959) y la teoría de los sucesos situacionales de la satisfacción laboral de Quarstein et al. (1992) para analizar los factores de satisfacción e insatisfacción de los docentes administrativos de IES a luz de tres categorías: “presupuestos institucionales”, “tiempo y carga laboral” y “condiciones físicas de trabajo”. Los resultados de este estudio muestran que la satisfacción y la insatisfacción frente a la labor a distancia de los docentes administrativos de IES en tiempos de pandemia son heterogéneos según género, edad e institución a las que pertenecen. Se abordan las limitaciones relacionadas con el sector específico de las IES y la naturaleza transversal de los datos.
PROTOCOLO DE VALORACIÓN Y DIAGNÓSTICO EN PRACTICANTES DE VOLEIBOL SENTADO
Authors: Jeason Morales Aguilar
Published: December 2020

El Voleibol sentado, es una de las disciplinas deportivas en vía de desarrollo para personas en condición de discapacidad. En este campo, el análisis de la condición física de los deportistas se ha convertido en un objetivo prioritario para la mayoría de investigadores y entrenadores, siendo fundamental aplicar “…análisis biomecánico de gestos deportivos… (lo que) aporta parámetros de amplitud y frecuencia que permite realizar estudios descriptivos y comparativos”. El presente estudio busca diseñar un protocolo de valoración y diagnóstico de la condición física y comportamiento biomecánico para practicantes de voleibol sentado. Materiales y métodos: Se realizó en deportistas pertenecientes a la selección Colombia de voleibol sentado. Se seleccionan test y medidas basadas en la evidencia, los cuales se aplican en una prueba piloto para su validación. Los test de aptitud física seleccionados son el Bent Arm Hang, el Squat Jump Adaptado Al Tren Superior, el Shoulder Stretch, Flexión lateral de tronco, Modified Thomas Test, basados en el Manual de condición física de Brockoport, el Flexitest, el FMS Scoring Criteria validados en personas con discapacidad. Por otra parte se realizó un estudio del comportamiento biomecánico que incluye electromiografía, análisis cinético y cinemático de las diferentes técnicas de voleibol sentado (Plataforma BTS P-6000; Sistema opto electrónico de alta precisión (BTS SMARTDX); Equipo electromiográfico inalámbrico (BTS FREEEMG). Resultados: Las pruebas evidenciaron retracción en el test de rotación de hombro y en flexión lateral de tronco en la mayoría de la población, obteniendo valores de 3/3 en FMS y una puntuación de 1/4 respectivamente. El análisis biomecánico permitió como determinante de la fuerza de reacción, la presencia de la amputación y las alteraciones en la estabilidad de tronco. Igualmente en la electromiografía se describe la participación del trapecio en la fase inicial de la técnica, luego una activación del deltoides medio y pectoral mayor, finalizando el ciclo con los músculos estabilizadores de tronco. Los resultados obtenidos muestran que las pruebas diseñadas en el protocolo permiten conocer no solo el nivel de condición física de cada deportista, sino además el comportamiento muscular en el momento de ejecución de la técnica y el patrón biomecánico del tren superior que se expresa durante todo el ciclo de cada ejecución. Lo que hace de este protocolo una propuesta de evaluación integral de cada deportista que permita potenciar el desempeño del practicante de voleibol sentado.
Los procesos de aprendizaje en las sociedades prehistóricas: Un enfoque etnoarqueológico
Authors: Rubio de Miguel Isabel
Published: December 2020

El aprendizaje en el contexto de sociedades prehistóricas no ha sido tratado en profundidad, de forma específica, más que en escasos estudios. Se ha abordado a partir del resto material mismo o mediante la observación de sociedades vivas que suministran posibilidades de interpretación, sobre todo para los aspectos sociales y rituales. La Etnoarqueología puede aportar explicaciones interesantes, resultando su enfoque especialmente idóneo para las Arqueologías de género y de la infancia.
Las estelas de guerrero del valle medio del Tajo. Recreación experimental del proceso de elaboración
Authors: Gutiérrez Sáez Carmen , Muñoz Moro Pedro , Pereira Juan , Chapa Brunet Teresa
Published: December 2020

Presentamos los resultados de la recreación experimental de una estela de guerrero utilizando como modelos seis estelas del Valle Medio del Tajo: Las Herencias I, Arroyo Manzanas (o Las Herencias II) y Barranca del Águila (Talavera de la Reina) en la zona norte, próximas al río Tajo, así como las dos de Aldeanueva de San Bartolomé y La Estrella en la comarca de la Jara. La réplica se ha elaborado a lo largo de 4 horas con cinceles de bronce sobre una losa rectangular de esquisto grauváquico procedente de la Jara toledana. Se han grabado mediante incisiones y repiqueteados algunos motivos característicos de estas piezas como una figura de guerrero tocada con cuernos y armada con espada, lanza y escudo, un lingote, un espejo y un carro con dos caballos. A partir de esta experiencia se aportan algunas reflexiones en torno a la elaboración de las estelas del Bronce final[1].
El final de los “poblados de hoyos”: la ocupación del Hierro Antiguo en el yacimiento de Soto del Henares (Torrejón de Ardoz, Madrid)
Authors: Blasco Concepción , Galindo Lorenzo , M. Sánchez Vicente , Ríos Patricia , Liesau Corina
Published: December 2020

El trabajo da a conocer una reducida ocupación del Hierro Antiguo localizada en la vega baja del Henares. Representa la última etapa de un “poblado de hoyos” instalado a finales del Neolítico. La arquitectura de esta última fase compagina las subestructuras de hoyos similares a los de las etapas precedentes con las cabañas aéreas de perfil rectilíneo sustentadas por postes leñosos. Este tipo de instalaciones son conocidas en yacimientos coetáneos de distintas regiones de Europa Occidental e interpretadas como granjas. Entre los restos muebles que ha entregado destaca un lote de pequeños recipientes de cuidada decoración realizada con incisión y pintura postcocción.
Una nueva cetaria en Rota y el garum de sardinas en época altoimperial
Authors: Bernal-Casasola Darío , Gabriel Sonia , Hernández-Tórtoles Alicia , Lavado-Florido María Luisa
Published: December 2020

Presentamos los resultados de una reciente intervención arqueológica preventiva (2018-2019) en la c/ Almenas de Rota (Cádiz), junto al Mercado Central de Abastos. Se ha podido identificar parte de una factoría de salazones romana totalmente desconocida, de la cual se han excavado tres piletas correspondientes con una esquina del edificio conservero. El análisis arqueoictiológico de los restos piscícolas hallados en posición primaria sobre el fondo de las cubetas ha determinado que el último procesado que allí se hizo fue garum, elaborado con clupeidos (principalmente Sardina pilchardus; sardina), planteando la importancia de la explotación de este recurso en el siglo I d.C. Estos nuevos hallazgos, totalmente inéditos hasta la fecha, son relevantes para el conocimiento arqueológico de Rota en la Antigüedad y de las actividades conserveras en la bahía de Cádiz; y para la reflexión sobre las artesanías haliéuticas durante el Alto Imperio, fechas para las cuales aún contamos con escasos contextos conserveros como el que aquí se presenta.
Un modelo de implantación de Roma en el Noroeste peninsular: la construcción de graneros sobreelevados en los castros
Authors: Salido Domínguez Javier
Published: December 2020

En este artículo analizamos la economía agraria durante el proceso de implantación romana en el noroeste peninsular. A diferencia de lo que evidencian los resultados de los análisis arqueobotánicos, con pocos cambios importantes en la producción cerealista, destacamos un fenómeno muy particular del noroeste peninsular que comprende la construcción de graneros sobreelevados (horrea) en los castros. A partir de este estudio planteamos que esta concentración del excedente agrario es producto de los procedimientos de control, gestión y administración de las reservas dentro de una acción, planificación y programación de Roma en la región noroccidental de Hispania.
El ocultamiento de bronces altoimperiales hallado en la parroquia de Cenero, Gijón (Asturias)
Authors: Gil Sendino Fernando , Requejo Pagés Otilia
Published: December 2020

El “tesoro de Cenero” es un depósito de monedas de bronce altoimperiales encontrado al sur del concejo de Gijón (Asturias, España). Las circunstancias de su descubrimiento, que permitieron recuperar el conjunto al completo, y la buena conservación de los ejemplares hacen de este hallazgo un ejemplo excepcional para el estudio de los atesoramientos altoimperiales conocidos en la península ibérica, así como una excelente fuente de conocimiento sobre el aprovisionamiento de moneda y valores circulantes en la segunda mitad del siglo II d.C. en la vertiente cantábrica.
Un taller de huesos de época romana en Regina (Casas de Reina, Badajoz)
Authors: Rodríguez Martín F. Germán
Published: December 2020

En las excavaciones realizadas en el yacimiento de Regina (Casas de Reina, Badajoz), en el verano de 1996, se localizó material óseo de época romana procedente de un taller, cuya ubicación desconocemos. Dichos vertidos formaron parte, junto con otros materiales, del arreglo de una calle cercana al Decumanus máximo, en las proximidades de una de las termas de la ciudad. La oficina estuvo en funcionamiento entre finales del siglo III y IV d.C. Elaboró principalmente: acus, acus crinalis y objetos relacionados con el mundo textil. Sus productos, a tenor de los resultados, tuvieron una dispersión de ámbito local-regional.
Vicente Paredes Guillén y la de vía de la Plata. Un arqueólogo adelantado a su tiempo
Authors: Durán Cabello Rosalía María , Salas Álvarez Jesús de la Ascensión
Published: December 2020

El presente trabajo es una reflexión sobre las prospecciones que realizó el ingeniero y arqueólogo D. Vicente Paredes Guillén, en Extremadura en general, y sobre el camino de la Plata, en particular. Fruto de estas investigaciones son una serie de mapas y fotografías, algunas de ellas inéditas. Aquí incidiremos especialmente en la manera que tuvo de abordar el estudio de la “Vía de la Plata” en el que demuestra una modernidad notable. En efecto, se adelantó a su tiempo al acometer un estudio que hoy denominaríamos contextual, como demuestra el rigor que aplica al reseñar todas las evidencias arqueológicas que la jalonan el mencionado camino romano. Se trata de una obra de gran valor no sólo por lo minucioso de su trabajo, si no por estar basado en prospecciones directas sobre el terreno.
Estabilidad de Taludes del Tajo Abierto Jésica considerando el Macizo Rocoso Isotrópico y Anisotrópico
Authors: Herrera Carranza Editta , Solórzano Poma Lloyd Williams
Published: December 2020

El trabajo de investigación analiza la estabilidad del talud global, en seis (6) tipos de alteración hidrotermal presentes en el tajo abierto Jésica, considerando al macizo rocoso isotrópico es decir que no tiene orientación preferencial de discontinuidades y anisotrópico teniendo en cuenta las discontinuidades paralelas o subparalelas al talud. Para el análisis de estabilidad de taludes del macizo rocoso isotrópico y anisotrópico se utilizó el criterio de rotura de Hoek-Brown Generalizado y Anisotrópico Generalizado respectivamente, ambos en el software Slide versión 6.0.

En el análisis de estabilidad anisotrópico se consideraron dos (2) familias de discontinuidades subparalelas al talud F1 (buzamiento de 72° a 82°) y F2 (buzamiento de 45° a 55°). Los factores de seguridad obtenidos considerando el macizo rocoso anisotrópico son menores hasta en 29% respecto a los obtenidos en el macizo rocoso isotrópico; así mismo a mayor calidad del macizo rocoso, mayor es la variación de los factores de seguridad, esta diferencia es más marcada en la zona de sulfuros con la familia F2, donde en un macizo rocoso con RMR 40 el factor de seguridad disminuye en 8%, mientras que en un macizo rocoso con RMR 61 el factor de seguridad disminuye en 29%.
Reducción del zinc mediante sulfato de aluminio y superfloc a-110: nivel laboratorio
Authors: Cuadros Oria Saida Margarita , Uriarte Ortiz Alex Santiago , Javier Silva Luz Alexandra
Published: December 2020

El presente artículo aborda la contaminación por la presencia de zinc en la laguna Pajuscocha, debido a que efluentes mineros que vienen siendo descargados a la laguna con un caudal promedio diario de 52 l/s aproximadamente, excediendo los límites máximos permisibles para efluentes mineros (> 1,5 mg/l). Para los fines del estudio, se realizaron dos acciones, el primero determinar el pH del caudal y la concentración de zinc del efluente, permitiendo plantear una segunda acción relacionado a la formulación de ocho muestras en función de las variables pH, coagulante Sulfato de Aluminio Al2(SO4)3.14H2O y floculante Superfloc A-110 a nivel de laboratorio, para la elección del coagulante y el floculante se consideró la eficiencia en costo y beneficio con la finalidad de reducir la concentración del zinc del efluente minero; además de su accesibilidad en el mercado. Finalmente, mediante la ejecución de las dos acciones se logró reducir la concentración del zinc a 0,79 mg/l, mediante las condiciones: coagulante: 6 ml, floculante: 1ml y pH: 8,8.
Formulación óptima de anfo aluminizado para voladuras en minería subterránea
Authors: Giraldo Paredez Emiliano Mauro
Published: December 2020

La perforación y voladura en una operación minera o civil, es esencial, puesto que de ello depende la eficiencia de las operaciones subsiguientes. Sin embargo, las voladuras también tienen efectos negativos, que pueden minimizarse, seleccionando explosivos de acuerdo al tipo de terreno. El explosivo más usado actualmente, es el ANFO, cuya potencia puede regularse, adicionando aluminio en distintos porcentajes en función del tipo de terreno (según la clasificación Bieniawski o Barton). Para materializar este estudio, se hicieron pruebas de voladura en la Mina Condestable, con ANFO aluminizado hasta el 6% de aluminio en polvo, cargando los taladros con aire comprimido a 80 PSI de presión y cebando con emulsión encartuchada. Bajo estas condiciones, se determinaron las concentraciones lineales de carga y la carga total por taladro. Del análisis de 20 parámetros, se concluye que la formulación óptima del ANFO aluminizado para las voladuras primarias en los tajeos A, B1, B2 Y C de Condestable es el ANFO aluminizado al 4 %, donde los tipos de terreno son de clase II y III-II. Asimismo, se determina que el porcentaje de aluminio adicionado al ANFO guarda una relación directa con el tipo de roca.
Mega sistema estructural Cajamarca, configuración estructural sugerida en relación con la mineralización de pórfidos y epitermales en el Norte del Perú
Authors: Torres Guerra Jesús A. , Tumi Pacheco José , Samanez Trigoso Mariel , Caycho Vilca Yordy
Published: December 2020

El norte del Perú se caracteriza por la presencia de yacimientos tipo pórfido (Cu-Au, y Cu-Mo) y epitermales (Au) de clase mundial, ubicados en el sector occidental de los Andes centrales en el norte del Perú. Estas minas y depósitos mineralizados se presentan en relación temporo-estructural asociados a magmatismo del Neógeno con edades desde 24 Ma a 7 Ma., intruyendo rocas silicoclásticas del Cretáceo superior, que por efectos de las deformaciones tectónicas particularmente en el Cenozoico (fases Incaica y Quechua), ocasionaron la ocurrencia de mega controles estructurales complejos como el que se propone en la siguiente publicación y espera abrir una ventana de debate en su entorno. Estructuralmente, los yacimientos en el norte del Perú, están controlados por mega sistemas estructurales que contienen en el sector oriental como principal accidente estructural la falla Punre – Canchis (Rivera et al., 2008) así como los pliegues y fallas del sistema estructural del Marañón, y en el sector occidental incluyen fallas al este de Chongoyape que limitan el Batolito de la Costa hacia el borde oriental, así como los silicoclásticos del Mesozoico, poniéndolos en contacto con volcánicos del Cenozoico. La cuenca en su sector occidental habría sufrido cambios en los estados de esfuerzos regionales, produciendo movimientos epirogénicos, desde el Cretácico superior, jugando un importante rol las grandes fallas regionales controlando la cuenca extensiva a través de fallas normales (Pardo‐Casas & Molnar, 1987). La subducción se dio de manera oblicua y con un bajo ángulo, generando así zonas permeables, de dimensiones kilométricas, generando mega estructuras paralelas y conjugadas que dieron lugar a jogs estructurales. Luego del análisis y evaluación de la información recopilada, nos permiten sugerir un nuevo concepto para definir el comportamiento estructural de este sector de los andes peruanos, proponiendo la denominación Mega Sistema Estructural Cajamarca, a un sistema de cinemática sinextral compresivo y de dirección andina, en el Mioceno, también consideramos que en este sector norte del país, se ha desarrollado una zona de convergencia oblicua de las placas en la zona de subducción, así como la variación del ángulo de subducción (15°), como rasgos importantes para la creación de depósitos minerales. En este sentido, este concepto tiene como principal objetivo involucrar un macro mecanismo general de entendimiento e interpretación de conjunto, que involucran estudios estructurales antes realizados. Palabras clave: Exámenes médicos pre-ocupacionales y periódicos; salud ocupacional; hipoacusia; planta de teñidos textil.
Overcoming Vanitas, or Showing One’s Cards
Authors: Kubeckienė Vaiva
Published: December 2020

In the article the painting Card Player Showing His Hand by T. Rombouts (17th c. Netherlands) is being interpreted. It is noticed that two existential manifestations may interact in this composition: the gambler’s and Vanitas. In the first part of this article, an analysis is made how Rombouts presents card play as a way of being and how he integrates it into the genre of Vanitas. In the second part the hypothesis, is it proven that the composition of the painting continues the theme of Vanitas and questions it at the same time.
СЕМАНТИКА ВРЕМЕН ГОДА В РОМАНЕ Л. ТОЛСТОГО «ВОСКРЕСЕНИЕ»
Authors: Masolova Elena
Published: December 2020

The article is devoted to the revealing of the seasons semantics in Tolstoy’s novel “Resurrection”. Having examined the events happening to the characters of Tolstoy’s novel during 15 years of their life we came to the conclusion that in the “Resurrection” the depicted seasons are associated with reconstruction of humanity’s steady movement towards God. The description of spring at the beginning of the novel is a parable-like prologue that affirms the idea of mankind’s future spiritual resurrection. In spring, 29 year-old Nekhlyudov decided to redeem himself in front of Maslova. When the main character recollected the spring of his youth, he realized social ill-being and the need to find the lost harmony with the world thus, he abdicated from his right to the land ownership. Student Nekhlyudov saw in summer nature a source of inspiration; in summer, escorting prisoners to hard labor, the character understood the roots of social evil, and prisoner Maslova returned to her original pure self. The spiritual spring of Nekhlyudov takes place in a calendar spring, and his spiritual resurrection happened in autumn; Maslova’s spiritual spring coincides with a calendar summer. The character comes to the adoption of Christianity in fall reading the Gospel. In the finale of the novel, early winter “rushes” the earth’s renewal; Nekhlyudov’s enlightenment is predetermined by changes in nature and by the indisputable rightness of God’s Word which had been revealed to him. In the “Resurrection”, the seasons become the markers of being and gain the ontological significance. Spring symbolizes future moral enlightenment of the mankind; summer is a symbol of life; fall “strengthens” Nekhlyudov’s religious searches, “convincing” him to build life according to God’s covenants; winter is a cleansing preparatory period that precedes the spiritual resurrection of people. The epic character by Tosltoy emerges due to the correlation of natural calendar with the semantics of seasons developed in Old Russian literature. The novel “Resurrection” is an artistic work of Christian realism that continues the tradition of Old Russian literature.
LE BOURGEOIS GENTILHOMME В РОМАНЕ Л. Н. ТОЛСТОГО «ВОЙНА И МИР»
Authors: Stroganov Mikhail
Published: December 2020

L. N. Tolstoy does not make any direct statements about the great French Revolution, although a probe into the writer’s attitude to this historical event allows us to understand his interpretation of phenomena contemporary to him. In this sense, the analysis of the early drafts of the novel War and Peace (1864) conducted in this article is of great interest. In these drafts, French politicians of the Directory period are called ‘rich upstarts’ and ‘yesterday’s bourgeois gentilhommes.’ Bonaparte himself is referred to as “a clever, cunning and evil successful bourgeois.” And in the outline of the preface to the novel Tolstoy repeats this comparison again: “funny and disgusting, like a Philistine in the nobility.” All of these formulas date back to the famous comedy by J. B. Moliere Le Bourgeois Gentilhomme (1670). Although Napoleon Bonaparte was not a bourgeois by birth, his origins in the provincial Corsica led to a mention of him as a “bourgeois nobleman,” or parvenu in the drafts of War and Peace. This expression had a negative connotation due to the hereditary pride and prejudice of the aristocrat Tolstoy against the lower classes and his reaction to the novel by N. G. Chernyshevsky’s What Is to Be Done? (1863). In the final text of War and Peace, influenced by the news of the civil execution and exile of Chernyshevsky, Tolstoy removed these direct characteristics, although the overall negative assessment of Napoleon remained. Later Tolstoy repeatedly used images of this comedy, but did not attach negative connotations to them. Establishing the connection between the image of Napoleon and the “bourgeois gentilhommes” in the drafts for Tolstoy’s novel War and Peace allows us to more accurately determine the writer’s political views in the mid-1860s.
Exciton-polaritons in 2d macroporous silicon structures with nano-coatings
Authors:   V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, Karachevtseva L. A. , Lytvynenko O. O. ,   V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, Onyshchenko V. F. ,   V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, Strelchuk V. V. ,   V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, Boyko V. A. ,   V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine
Published: December 2020

In this paper, we investigated high-resolution IR absorption and reflection spectra in one-sided periodical 2D macroporous silicon structures with nano-coatings of SiO2 and CdS, ZnO nanoparticles, as well as two-sided structures of macroporous silicon without nano-coatings. After changing the resolution of spectra measurements from 2 to 1 cm–1, the oscillation period of Wannier-Stark electro-optical effect decreases by 3 times, and absorption increases by 60–100 times; and for two-sided structures the oscillation period decreases by 1.5 times and absorption increases by 25–30 %. In addition, giant absorption oscillations with positive and negative amplitudes of 107 arb. un. were evaluated in spectral regions of Si–Si–bonds and Pb centers. Similar oscillations in the reflection spectra have much less amplitudes up to 4·104 arb. un. In the spectral area of the transverse phonon ωTO (Si–Si–bonds) absorption spectra of 2D macroporous silicon structures consistent fully with data for phonon polaritons in microresonators as a result of resonance interaction of dipole-active vibrations with the frequency of ωTO in thin films with the surface modes of microresonator. In addition, microresonators interact both with each other in one-sided macroporous silicon structures and in the system of two-sided macroporous silicon. The giant absorption oscillations testify the strong interaction of surface polaritons with photons. The coherence of oscillations and large-scale spatial correlation are а result of exciton-polariton condensation on macropores as microresonators. In 2D macroporous silicon structures with nano-coatings band bending on the surface of the macropores are significant. Therefore, the generated photoelectrons link with holes, forming electron-hole pairs named as exciton-polaritons according to phenomenon of Bose-Einstein condensation.
Investigation of some volcanic glasses of georgian deposits
Authors:   Iv. Javakhishvili Tbilisi State University, Tsintskaladze G. P. ,   P.Melikishvili Institute of Physical and Organic Chemistry Georgia, Eprikashvili L. G. ,   Iv. Javakhishvili Tbilisi State University; P.Melikishvili Institute of Physical and Organic Chemistry Georgia, Kordzakhia T. N. ,   Iv. Javakhishvili Tbilisi State University; P.Melikishvili Institute of Physical and Organic Chemistry Georgia, Sharashenidze T. V. ,   Iv. Javakhishvili Tbilisi State University; P.Melikishvili Institute of Physical and Organic Chemistry Georgia, Zautashvili M. G. ,   Iv. Javakhishvili Tbilisi State University; P.Melikishvili Institute of Physical and Organic Chemistry Georgia, Gabunia V. M. ,   Iv. Javakhishvili Tbilisi State University; P.Melikishvili Institute of Physical and Organic Chemistry Georgia
Published: December 2020

The paper presents research materials on some hydrogen-containing volcanic glasses of Transcaucasia of acidic composition, concentrated in areas of late Tertiary-Quaternary volcanism, in particular, the central part of the Akhalkalaki plateau, within the Akhaltsikhe valley (Georgia). Studies of natural materials of perlite, obsidian and pechstein were carried out by geological, physico-chemical: petrography, chemical analysis, X-ray diffractometry, and IR spectroscopic methods. The work shows the genesis, structural features and prospects of using these minerals. It has been found that the chemical composition of the minerals studied is characterized by a different content of aluminum oxide Al2O3. It is shown that silicon oxide SiO2, which is a part of volcanic glasses, occurs in an amorphous state. Perlites of the studied deposits differ from each other both visually and in composition. The perlites of the Toloshi deposit are dark gray in color and the Paravani deposits are white. In the perlite spectra of the Tolosh deposit, the vibrational frequencies of both the intratetrahedral and in the intertetrahedral space of Si-O-Si (Al) indicate that silicon is replaced by aluminum to a lesser extent than in the perlite of the Paravan deposit. The prospects of using expanded volcanic glasses are also shown.
Reinforcement of epoxy polymers with hydride-silylated fumed silica
Authors:   Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kuzema P. O. , Starokadomsky D. L. ,   Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Tkachenko O. O. ,   Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Tertykh V. A. ,   Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
Published: December 2020

Fumed silica (FS) is widely used in numerous fields of application, the plastics industry being one of the most significance, where FS has proved to be successful as an efficient thickening, thixotropic, and anti-settling agent, as well as reinforcing filler. Chemical modification of silica surface enlarges its functional capabilities. In particular, silica with grafted silicon hydride groups was found to be active in the processes of hydrosilylation of alkene and alkyne bonds in monomers during their polymerization, resulting in the formation of reinforced polymeric composites. Recently, specific epoxy resins have gained significance, and FS was found to be useful, particularly as rheological additive. The aim of this study was to evaluate the efficiency of hydride-silylated FS (HFS) as a potentially active reinforcing component for epoxy-based polymers. The activation energy for hydrosilylation of olefins is higher than that for ring-opening polymerization of epoxides, therefore, one may expect the latter process with participation of ≡SiH groups to proceed more readily. HFS was obtained via FS treatment with triethoxysilane. The presence of grafted silicon hydride groups was confirmed by means of IR spectroscopy, and their concentration measured by titrimetric and spectrophotometric analysis was found to be about 0.4 mmol/g. FS-epoxy and HFS-epoxy composites were prepared by the corresponding filler introduction (2 wt. % loading) into the mixture of epoxy monomer and amine hardener. The resulted materials after curing were subject to compression, bending, and adhesion tests. Compression tests revealed that filling with FS and HFS reduced the compressive strength by 10%, however, HFS-epoxy composite was found to possess an increased by 20 % Young’s modulus for compression as compared to that for the unfilled epoxy polymer. Upon this, 2 wt. % loading with silicas keeps the ductility of the polymer. Also, silica-containing epoxy polymers showed an improved bending strength and bending modulus, the former being two times higher for HFS-epoxy composite than that for the unfilled polymer. The adhesion to steel was found to increase by more than 2 times upon filling with silicas, HFS-epoxy composite being also superior as compared to the FS-epoxy one. Thus, preliminary results indicate that fumed silica with grafted silicon hydride groups shows promise as active reinforcing filler for epoxy polymers.
UV irradiation effect on paramagnetic properties of nanomagnetite doped with Ag(I) and Au(III) cations
Authors:   Frantsevych Institute of Problems of Materials Science of National Academy of Sciences of Ukraine, Lavrynenko O. M. , Zahornyi M. N. ,   Frantsevych Institute of Problems of Materials Science of National Academy of Sciences of Ukraine, Bataiev M. M. ,   Frantsevych Institute of Problems of Materials Science of National Academy of Sciences of Ukraine, Bataiev Yu. M. ,   Frantsevych Institute of Problems of Materials Science of National Academy of Sciences of Ukraine, Pavlenko O. Yu. ,   Frantsevych Institute of Problems of Materials Science of National Academy of Sciences of Ukraine, Kornienko O. A. ,   Frantsevych Institute of Problems of Materials Science of National Academy of Sciences of Ukraine
Published: December 2020

Nowadays nanocomposites based on magnetite doped with noble metal cations or core&shell type nanocomposites including superparamagnetic core and precious metal shells are widely used in new kinds of biocompatible materials creation. The following structures are characterized by unique complexes of physical-chemical properties. The noble metal coatings formed on the magnetite nanoparticles surface supply their corrosive biological media stabilization and effects on electrical, magnetic, catalytic, optical properties of core&shell type nanocomposites as well. This work studies the effect of UV irradiation (253 nm) on the paramagnetic characteristics of biocompatible core&shell type nanocomposites based on magnetite and precious metals (silver, gold). Nanoparticles of magnetite and core&shell type composites Fe3O4&Ag0 and Fe3O4&Au0 were formed under the rotation-corrosion dispergation conditions on the steel 3 (St3) surface contacting with distilled water and aqueous solutions of silver nitrate and tetrachloroauric acid at a free flow of oxygen into the reaction zone. Solutions of precious metals contained from 0.5 to 20 mg/dm3 of Ag(I) and Au(III) aquaforms. The composite nanoparticles were characterized using X-ray diffraction data, scanning electron microscopy and electron paramagnetic resonance spectroscopy. Because of expecting photocatalytic activity of as-prepared nanocomposites, we performed their illumination by ultraviolet irradiation. The effect of UV irradiation (253 nm) on the paramagnetic characteristics of biocompatible core&shell nanocomposites based on magnetite and precious metals (silver, gold) was studied by EPR analysis. The obtained data suggests that after UV irradiation the contribution of Fe2+ spins increases, the band gap for Fe3O4 decreases, the rate of charge redistribution at the oxide-metal interface increases, the number of spins in the composite increases. The study of the occurrence of paramagnetic centers mechanism in the nanocomposites based on magnetite and precious metals may be relevant for determining their bactericidal and photocatalytic activity. Also, such nanocomposites can be used in the creation of technical means for prevention of the spread of infectious diseases in the transport, public places, and hospitals.